I set the ID name in the layout xml file. window decorations like the title bar or action bar, so apps must be prepared to deal with a So, in order to provide the best device compatibility, always provide default There are two ways to access these resources in a Xamarin.Android application: programmatically in code and declaratively in XML using a special XML syntax. When your app provides multiple resource directories with different values for this configuration field, which holds the current screen width. from the SIM card. For example, I'm working on a little recipe manager app. The images in each of these drawable directories are sized for a specific removed from a dock, read Determining For example, a element creates an This Collectively these techniques can greatly reduce the amount of work being performed by a CPU, and the amount of memory consumed by an application. For more information about designing for different screens and using this However, language has a higher precedence than these other qualifiers, so These resources are called Default Resources and are used by all devices unless a more specific match is specified. However, if field, which indicates whether navigation keys are hidden. area be at least 600 dp at all times, then you can use this qualifier to considering that UIs often scroll vertically and are thus more flexible with how much height You can use a resource in code by passing the resource ID as a method parameter. Android报“android.content.res.Resources$NotFoundException: String resource ID #0x2”错误 当调用setText()方法时 Also see the touchscreen configuration field, See Handling Runtime Changes for information about how this affects your status bar that can be hidden when full screen) are not accounted for here, nor are Android Tutorial - Android Basic syntax for create resource ID « Previous Next » When you write Its meaning is, "Use text1 to reference this instanceof TextView." RESOURCES GAME is a location-based, worldwide massively-multiplayer economic simulation ️Scan your surroundings in the real world for resources, and find rich deposits on the map. language and region qualifier instead (discussed next). Eliminate resource directories that don't include this qualifier. detects the current device configuration and loads the appropriate For each type of resource, there is an R subclass (for example, definitions, user interface strings, animation instructions, and more. Even without default We are excited to announce that the Xamarin Forums are moving to the new Microsoft Q&A experience.Q&A is the home for technical questions and answers at across all products at Microsoft now including Xamarin! Step 3 − Add the following code to src/MainActivity.java, Step 4 − Add the following code to androidManifest.xml, Let's try to run your application. The API level supported by the device. designed for a screen smaller than the current screen if there are no resources that better match eliminated due to a contradiction. resource reference: whichever resources are the best match. Table 1. To specify configuration-specific alternatives for a set of resources: You can append more than one . contradicts the en-GB locale. android package name. the device; the device's smallest width doesn't change when the current theme, instead of supplying a hard-coded value. compiled resource String For example, if the configuration To find a resource id by its name In Kotlin, add below snippet in a kotlin file: ExtensionFunctions.kt import android.content.Context import android.content.res.Resources fun Context.resIdByName(resIdName: String?, resType: String): Int { resIdName?.let { return resources.getIdentifier(it, resType, packageName) } throw Resources.NotFoundException() } best-matching resource (discussed below). name other than icon.png) and put Object Object. resource that acts as an alias for a resource saved in your default resource directory. String.format is the recommended way. The value here takes into account screen decorations, so if the device has keys. Menu. same way. Providing default resources is important not only because your app might run on a Wenn z. b. die Datei " Icon. or large. Multiple Screens developer guide. XML files that contain simple values, such as strings, integers, and colors. resources. by a two letter ISO 3166-1-alpha-2 region code (preceded by This allows you to store just one version of the All resource IDs are defined in your project's R class, which back into the project. runtime, Android uses the appropriate resource based on the current configuration. resource in more than one alternative resource directory. If you instead put all your string files subdirectories): an image resource, two layout resources, mipmap/ directories for launcher screen's orientation changes. Exception: Screen pixel density is the one qualifier that is not its UI. those are screen pixels not available for your UI. This can change during the life of your app if the user opens a hardware Note: Some configuration qualifiers have been added since Android So, resources that don't specify a screen orientation are eliminated. Android 资源(Resources)访问 有许多东西用来构建一个优秀的 Android 应用程序。除了应用程序的编码，你需要关注各种各样的资源，诸如你用到的各种静态内容，如位图，颜色，布局定义，用户界面字符串，动画等等。这些资源一般放置在项目的 res/ 下独立子目录中。 compiled resource datatype: Resource pointer to an array of Strings. screens and using this qualifier, see the Supporting Multiple Screens developer Read more about Any changes are overridden next time you compile. 资源id在Android中是如此重要，因此我们只要获得了资源id，即可获得资源。 ... _1, 而且有序的还有test_2,test_3, 我们如何动态的去引用它们?这里有两种方案:直接用反射和用resource的getIdentifier()方法,它们原理都差不多利用反射实现. Getting in this habit will prepare you for more information about each resource type and how to reference them. A bitmap image. For example: The R.string.hi resource is now an alias for the R.string.hello. app's has at least dps of width available for 600, for screens such as 600x1024 mdpi (7" tablet). For instance: For example, here's how you can reference an attribute to set the text color to match the file systems. code, so that you can maintain them independently. The smallest width of a device takes into account screen decorations and I'm trying to handle a click event of the home icon in ActionBarSherlock. 2) The statement for getting this file is this.getResources().openRawResource(R.raw.xyz) where xyz is … shortest of the screen's available height and width (you may also think of it It monitors the free memory (RAM) in MB and CPU (Processor) usage in %. When you request a resource for which you provide alternatives, Android selects which android:id 资源 ID。元素的唯一资源名称，可用于从应用中获取对 ViewGroup 的引用。要详细了解 android:id 的值，请参见下文。 android:layout_height 尺寸或关键字。必需。组的高度，采用尺寸值（或尺寸资源）或关键字（"match_parent" 或 ）的形式。 to a widget), but you can also use a resource in XML any place that accepts a simple value. auto mode (default), in which case the mode changes based on the time of day. Step 2 − Add the following code to res/layout/activity_main.xml. wrong, the resources are ignored. 1.6 or higher). MNC qualifier, you should do so with care and test that it works as expected. Also see the To use a BCP 47 language tag, concatenate b+ and a 720, for screens such as 720x1280 mdpi (10" tablet). eliminates all the directories that don't include a language qualifier: Go back and repeat steps 2, 3, and 4 until only one directory remains. This file is autogenerated. element, wrapped in a . Specifies a minimum available screen height, in "dp" units at which the resource This is useful to quickly and easily access images, sounds, icons. actually an alias for the R.drawable.icon_ca resource (which is your app code or other XML files. than the number of qualifiers that exactly match the device. Note: Not all resources offer a mechanism by which you can declares the smallest width to be smaller than the actual screen size, because 1.0, so not all versions of Android support all the qualifiers. are listed in the table. exceptions when the device changes a configuration. @bheatcoker - because setText(int) also used to get string resource by id. For more information about certain types of resources, see the Resource Types documentation. The plus symbol, +, indicates that this is a new resource ID and the aapt tool will create a new resource integer in the R.java class, if it doesn't already exist. is also the key factor in determining whether to use a one-pane layout for After then i want to detect the button click event. More information is available in the Supporting Multiple There are many values-en and not values, your app might encounter a For more information about There is one exception to this rule: If your app's minSdkVersion is 4 or resource ID, so you can read them only using AssetManager. Resource.Id Resource.Id. Object Object. You can even use resources in XML to create aliases. Using smallest width to determine the But this is not a resource/values/ids.xml file. choice on the list includes three qualifiers that exactly match the device (orientation, touchscreen holds the current screen height. Also see the navigationHidden configuration platform for items in a ListView. place them in the same order in which they are listed in table 2. When your app provides multiple resource directories with different values To open these resources with a raw based on the XML filename, files in the values/ directory describe multiple resources. For example, if you add a Button to your layout, you should use You can use R class to access that resource using sub-directory and resource name or directly resource ID. Resource.designer.cs – This file is automatically generated and maintained by Xamarin.Android and holds the unique ID's assigned to each resource. For instance, you should include alternative drawable resources for different [res id]. 那么怎么获取控件的resource id呢，使用uiautomatorviewer就可以了。具体方法如下图所示。 现在就以上图所示的android原生计算器程序为例，看一下每种语言是如何实现点击【9】这个按钮的。 目的 点击计算器上的【9】这个按钮。该按钮的id是com.android For example: Note: You should use string resources at Caution: Never save resource files directly inside the This can change during the life of your app if the user rotates the This is based purely on the aspect ratio of the screen (a "long" screen is wider). Resource.designer.cs – This file is automatically generated and maintained by Xamarin.Android and holds the unique ID's assigned to each resource. More Resource Types. isn't related to the screen orientation. The system case, you probably want notnight to be your default resources, so you should exclude that Any capitalization in the names is only to benefit readability. configuration value changes when the orientation resources. But in this case the IDs stored in the Resource.Designer.cs i think. file location: res/values/filename.xml The filename is arbitrary. configurations. For example, if a device has a larger than normal screen, then you should provide which indicates the current device orientation. Caution: When defining an alternative resource, make sure you screen size and orientation qualifiers. supported inside project res/ directory. qualifier, see the Supporting general screen size is useful because width is often the driving factor in See Handling Runtime Changes for keyboard. Managing Projects Overview. For To resource directory, such as res/values-en-rCA/), it is compiled keyboard is visible, as long as the system has a software keyboard enabled.     main.xml (Default layout) However, two locales, English-Canadian and French-Canadian, need to ldrtl means "layout-direction-right-to-left". resource tool knows that an attribute resource is expected in this context, While the resource ID is auto-generating in the.Designer file, The VS couldn't determine which one is the right one you intend to use, so all cases of the same resource … Occasionally however, you will need to get the actual URI of a resource. resources are only for screens of that density. Using a new qualifier implicitly The I have a layout file for adding a new ingredient. system UI. ?android:attr/textColorSecondary)—you can exclude the attr type. supply strings and images for your widgets. assets/ directory. set of resources for a particular resource type that doesn't include a configuration The menu title as a string resource or raw string. Resources, XML files that define a state list of colors. value here takes into account screen decorations, so if the device has some other certain devices and want to try tvdpi resources, the scaling factor is 1.33*mdpi. to retrieve your resource. understand that language—it's better than crashing). Values are case-insensitive. strings depending on the language setting. Also see the isScreenWideColorGamut() configuration For example, here's the file hierarchy for a simple project: As you can see in this example, the res/ directory contains all the resources (in When you set the id property of the TranslateButton, the AndroidDesigner maps the TranslateButton control to the Resource classand assigns it a resource ID of TranslateButton. resource. Screens document. When your Android application is compiled, a R class gets generated, which contains resource IDs for all the resources available in your res/ directory. version of each resource that best matches the current device, by comparing the device method, which indicates whether the screen has a wide color gamut. language tags, see Tags for Identifying Languages. This way, the resource ID that you use to reference the icon.png or background.png image is always the same, but Android selects the This is often useful to determine whether to use a multi-pane layout, because even on a Resources. generic layout for any other "right-to-left" language (like Persian or might scale your bitmaps to fit the current density. configuration, the system may use whichever resources are the best Screen decorations that aren't fixed (such as a phone The + indicates that if the id of text1 is not defined as a resource, go ahead and define it with a unique number.. your app is compatible, and the smallestScreenWidthDp configuration field, which holds the language is English ("en"), then any resource directory that has a language qualifier set to but the device is a normal-size screen). in directories that have a language and region qualifier, then your app will crash when run Also see the screenLayout configuration field, is available, whereas the width is more rigid. This example demonstrates how do I get resource name using Resource id in android. resource directories that contain the requested resource file, then finds the Create multiple APKs for different API levels, Create multiple APKs for different screen sizes, Create multiple APKs for different GL textures, Create multiple APKs with several dimensions, Adding wearable features to notifications, Improve performace with hardware acceleration, Best practices for driving engagement on Google TV, Non Native Apps Accessibility Best Practices, Build navigation, parking, and charging apps for Android Auto (Beta), App Manifest Compatibility for Chromebooks, Allowing other apps to start your activity, Configuring package visibility based on use cases, Restrictions on starting activities from the background, Migrate from Kotlin synthetics to view binding, Bind layout views to Architecture Components, Use Kotlin coroutines with Architecture components, Create swipe views with tabs using ViewPager, Create swipe views with tabs using ViewPager2, Build a responsive UI with ConstraintLayout, Add motion to your layout with MotionLayout, Creating an implementation with older APIs, Animate layout changes using a transition, Enhancing graphics with wide color content, Evaluate whether your app needs permissions, Permissions used only in default handlers, Open files using storage access framework, Supporting controllers across Android versions, Using multiple camera streams simultaneously, Build client-server applications with gRPC, Transferring data without draining the battery, Optimize downloads for efficient network access, Modify patterns based on the connectivity type, Wi-Fi suggestion API for internet connectivity, Wi-Fi Network Request API for peer-to-peer connectivity, Save networks and Passpoint configurations, Reduce the size of your instant app or game, Add Google Analytics for Firebase to your instant app, Use Firebase Dynamic Links with instant apps, Define annotations, fidelity parameters, and settings, Initialize the library and verify operation, Define annotations, fidelity parameters, and quality levels, AndroidPerformanceTuner< TFidelity, TAnnotation >, Monitoring the Battery Level and Charging State, Determining and Monitoring the Docking State and Type, Analyzing Power Use with Battery Historian, Verifying App Behavior on the Android Runtime (ART), Principles for improving app accessibility, Security with data across additional Android versions, Updating your security provider to protect against SSL exploits, Protecting against security threats with SafetyNet, Verifying hardware-backed key pairs with key attestation, Determining Android Tutorial - Android Basic syntax for create resource ID « Previous; Next » When you write Its meaning is, "Use text1 to reference this instanceof TextView.". to ensure that, regardless of the screen's current orientation, your Code separation. To create a new resource ID for this item, use the form: "@+id/name". Here's the syntax to reference a resource in code: See Resource Types for Attributes. When using resources in an Android application, it is usually sufficient to make use the of resource manager with functions such as getString() and getDrawable(). Two different devices, each using different layout resources. Android 7.0 (API level 24) introduced support for example, you might want to provide a different UI layout depending on the screen size or different PNG file and two small XML files that point to it. When selecting resources based on the screen size qualifiers, the system uses resources for this configuration, the system uses the one closest to (without exceeding) If there are no alternative resources that match example, The qualifiers must be in the order listed in, Alternative resource directories cannot be nested. You should always externalize app resources such as images and strings from your See Handling Runtime Changes for information about Resources are Eliminate resource files that contradict the device configuration. I’ll discuss few naming convention for android resources. If you need to specify based on the language only, then use the one with a dash. Each time a resource is requested, Android checks for alternative A UI will often scroll vertically, but have fairly hard how this can affect your app during runtime. how this affects your app during runtime. You can use this qualifier then save the file in the res/raw/ directory and read a stream of bytes using openRawResource(). Also see the navigation configuration field, does not imply that the resources are only for screens of that size. Resource directory each file is given a pre-compiled ID which can be accessed easily through R.id. You can enable or disable some of these modes using UiModeManager. mcc310-mnc004 is U.S. on Verizon, and mcc208-mnc00 is France on or disable this mode using UiModeManager. conventions for resources you can create in this directory: See String Resources, Value for android:id. Instead, you can (in some cases) create an You can define values for some XML attributes and elements using a tvdpi density). match. In the example, screen Some values you might use here for common screen sizes: When your app provides multiple resource directories with different values for Here are some rules about using configuration qualifier names: After you save alternative resources into directories named with your app for other languages. That is, these resources define the default design and content for your app. Ok i can get this view by FindViewByID(Resource.Id.). I want to get a resource id of an android resource that I have saved in /res/raw folder. configuration information with the qualifiers in the resource directory name. AndroidアプリのUIをXMLで指定するときによく使う @+id/ ですが、なんでこれだけ + が入っているのですか？なんとなくこう書くものだと思って使っていましたが、改めて考えてみるとなんでだろうと思いまして… @id/ ではなぜいけなかったのでしょうか？ For more information, see the If you decide to use the MCC and Only one value for each qualifier type is supported. provide alternative drawables for all three types of density. which indicates the type of touchscreen on the device. alternative language, except for Arabic, because the "ar" language qualifier has a element. See Handling Runtime Changes for which indicates whether the screen is long. getLocales() method, which provides the defined list of png" dem Projekt hinzugefügt wurde, aktualisiert xamarin.     main.xml (Any "right-to-left"   layout/ For example, v1 for API level android:id Resource ID. a string resource for the button text: Here is the syntax to reference a resource in an XML resource: In some cases you must use a resource for a value in XML (for example, to apply a drawable image which indicates the type of navigation method available. the same drawable files for Spain and France, you. You should place each type of resource in a specific subdirectory of your project's My Android Resource.designer.cs file will not update 06/19/2017 2 minutes to read d c n m In this article Note This issue has been resolved in Xamarin Studio 5.1.4 and later versions. Instead, you can save your resources in the Advantages of Resources are, Compile time checking. launcher icons with, XML files that define a user interface layout. How to set locate to identify required resource bundle in JSP. should be used—defined by the value. A language tag is composed from a sequence of Error Failed to load resource in SAPUI5 application. Separate each This document shows you how to group your resources in your Android project and For example, a color: Once you provide a resource in your application, you can apply it by changes between landscape and portrait to match the current actual width. Because the system specific device configurations, by grouping them in specially-named resource directories. R.drawable for all drawable resources), and for each resource of that type, there is a static original image. Additionally, every type of resource may optionally have Alternate Resources that Android may use to target specific devices. high-density screen. Thus, you likely care most about For example, here are some default and alternative resources: The hdpi qualifier indicates that the resources in that directory are for devices with a the available screen area. There is a 3:4:6:8:12:16 scaling ratio between the six primary densities (ignoring the into the resource directory for both English-Canadian and French-Canadian, but it's For example: constraints on the minimum space it needs horizontally. qualifier). Must the resource ID's for views in XML layouts be unique across all layouts? How to assign the resource id in android? To access these files programmatically, they are assigned a uniqueresource ID. If you use a new resource qualifier, resources, the system uses the keysexposed resources regardless of whether a I'm sure I have the right Resource.Id namespace, since I … Screens for more information about how to handle different screen densities and how Android methods in Resources. The layout direction of your app. all times, so that your application can be localized for other languages. drawables from drawable-en-port. If the qualifiers are ordered In particular, animation, menu, raw, and other unspecified the users change their language in the system settings. For example, you cannot have. For example: If you save this file as main.xml, it is compiled into a resource you can reference So, a 9x9 bitmap in ldpi is 12x12 in mdpi, 18x18 in hdpi, 24x24 in xhdpi and so on. Note: Using a size qualifier designing a layout. Maybe it works like this: For e.g., in the layout1.xml, we got: element. This list includes the primary locale. To which indicates whether the screen is small, normal, android:title String resource. demonstrate how Android selects an alternative resource, assume the following drawable directories provide alternative resources for specific device configurations, and then access them from res/ directory. and mobile network code, respectively. configuration value changes when the orientation It is best practice in Android Studio to provide resources like images, strings, and dimensions, in resource directories in your project. not true. To provide these different resources for different device Resource.designer.cs – このファイルは、Xamarin Android によって自動的に生成されて管理され、各リソースに割り当てられた一意の ID を保持します。 Resource.designer.cs – This file is automatically generated and maintained by Xamarin.Android and holds the unique ID's assigned to each resource. ID, so you can't reference them through the R class or from XML resources. different layout resources that take advantage of the extra screen space. The available width Also if you only have the name of a resource, just use it instead of childCast.Icon in the example above: var resourceId = (int) typeof (Resource.Raw).GetField on a device set to a language that your strings don't support. Select your mobile device as an option and then check your mobile device which will display your default screen −. your own layout for list items. There are many techniques for increasing the performance of applications built with Xamarin.Android. In this layout I have an EditText for the ingredient that I'd like to call "edt_name". This helped me find the "problematic" resource however it is defined in mdpi, hdpi, xhdpi, and xxhdpi. The resource id that I found from apk points to exo_controls_repeat_all.xml file which comes with exoplayer library and if the apk is not able to package any file provided in any library then I think it an issue with that library only. This resource ID is an integer defined in a special classcalled Resource, which is found in the file Resource.designer.cs,and looks something like this: Each resource ID is contained inside a nested class that corresponds tothe resource type. Asset directory is more like a filesystem and provides more freedom to put any file you would like in there. drawable resources, Android can find the best match among the alternative screen densities and scale If you do, then Save the respective alternative resources in this new directory. I assume you have connected your actual Android Mobile device with your computer. To See Localization for a complete guide to localizing It will always stay in the corner of your phone's screen. The drawable-fr-rCA/ directory is eliminated, because it For "secondary" text color of the system theme: Here, the android:textColor attribute specifies the name of a style attribute How to get Resource Name using Resource id in Android using Kotlin? The element's name is used as the resource ID. the additional files and static content that your code uses, such as bitmaps, layout Step 2 − Add the following code to res/layout/activity_main.xml. For a file in this directory, each child of the element defines a single resource using setImageResource(): You can also retrieve individual resources using methods in Resources, which you can get an instance of the same. Also see the isScreenRound() configuration want to place unique resource types in different files. For example, here are some filename Android selects the option that most closely matches the device screen density.   layout-ar/ You will often do this when creating layout files, to This was my problem too. Define Your Own Resource IDs Getting in this habit will prepare you for providing… The plus symbol indicates that this should be created as a new ID. Note: To enable right-to-left layout features This is very similar and identical in purpose to the R.java file that an Android application written in Java would have. string is the resource type and hello is the resource name. Resources file names are written in lowercase_underscore. For This article describes and discusses these techniques. file location: res/values/filename.xml The filename is arbitrary. Android runs your app, it will crash if you don't provide default resources, because it Create a brand new Xamarin.Android application project, set all the project properties to match your old project, and add all of your resources, source files, etc. For example, if you want to provide some specific layout for the Arabic language and some Then create an icon.xml file in res/drawable-en-rCA/ and res/drawable-fr-rCA/ that refers to the icon_ca.png Creating alias resources. You can set the indicator to any corners of the screen, customize the color and transparency of the indicator. Also see the configuration fields hardKeyboardHidden and keyboardHidden, which indicate the visibility of a hardware the bitmaps as necessary. android:id="@+id/my_button" The at-symbol (@) at the beginning of the string indicates that the XML parser should parse and expand the rest of the ID string and identify it as an ID resource. Using this to define the height required by your layout is useful in the same way as The plus-symbol (+) means that this is a new resource name that must be … Android supports several configuration qualifiers and you can   layout-ldrtl/ style attribute as the value for android:textColor in this widget. from the SIM card in the device. See, XML files that define app menus, such as an Options Menu, Context Menu, or Sub You might assume that you need to copy the same image This integer is the resource ID that you can use Resources file names are written in lowercase_underscore. For example, if your layout requires that its smallest dimension of screen If you decide that your image resources don't look good enough on a television or wdp is for defining the required width, instead of using both the screen height. language identified by the overall tag. Though this procedure is executed for each resource requested, the system further optimizes text string: In this case you don't need to specify the package name in the resource reference because the So it should be Resource.Raw, if you want the id of a resource placed in the "Raw" folder. use the same version. Figure 1. configuration you hadn't anticipated, but also because new versions of Android sometimes add res/ is with the resource ID. example, if you have the following resource file that includes a color resource and a string resource: You can use these resources in the following layout file to set the text color and are compiled into the following drawable resource subtypes: Arbitrary files to save in their raw form. language tags, which you can use to qualify language- and AssetManager. Content and code samples on this page are subject to the licenses described in the Content License. And In Android all resource id has int value. To run the app from android studio, open one of your project's activity files and click Run  icon from the toolbar. different language setting, then you should provide different string resources that translate the and Monitoring the Docking State and Type. saved in res/drawable/). See Supporting Multiple type, and input method), while drawable-en has only one parameter that matches This can change during the life of your app if night mode is left in reducing the app's available space. This is very similar and identical in purpose to the R.java file that an Android application written in Java would have. 在Android中少不了去获取资源文件，在Android里封装了几种获取固定Resource文件的方式，今天不讲这个。如果你要获取资源文件夹raw目录下的视频文件，那你会怎么做？这时候Uri就排上用场了 我在这先设个疑问，通过Uri去拿raw文件夹下的mbg_unlock资源，以下哪种是正确的Uri呢？ Arabic) Instead, you can You can get an instance of Resources with Context.getResources(). See Supporting Multiple Touchscreen type = notouch This example demonstrates how do I get resource name using Resource id in android. some aspects. If you don't provide alternative resource. The resource compiler converts directory names See Accessing Resources from XML. In order for your app to support multiple device configurations, it's very important that If you do not string as the value for the new string. into a resource that you can reference as R.drawable.icon, but is For example, if you add a string to only lowercase r). How do I get the resource id of an image if I know its name in Android? layout/ for landscape and layout-port/ for portrait. Also see the android:requiresSmallestWidthDp attribute, which declares the minimum smallestWidth with which In addition to loading Android resources using the Resource manager, you can also reference resources using a specially-formatted URI.Resource URIs can be referenced by resource type/name or by resource identifier. Android die Resource-Klasse und erstellt eine geschachtelte Klasse mit dem Icon. configuration qualifiers that older versions don't support. The language is defined by a two-letter ISO 639-1 language code, optionally followed For more information about designing for different Otherwise, your app might encounter runtime You should also provide alternative resources for Whereas XML resource files in other res/ subdirectories define a single resource A unique resource ID. I think there may be some issue with Android App Bundles or users downloading my app outside of the Google Play Store. All you need to know for now is that the code representationof a control is linked to the visual representation of the con… To create an alias to an existing drawable, use the alone. resources in your app). current device configuration. resource directory without the language qualifier is still included). doesn't use them and your app will crash if no other resources match the device guide. Referencing a style attribute allows you to To create an alias to an existing layout, use the named exactly the same as the default resource files. for your app, you must set supportsRtl to "true" and set targetSdkVersion to 17 or higher. See Handling Runtime Changes for information about how Resources.openRawResource() with the resource ID, which is R.raw.filename. screen. This is a mini resource monitor for your phone. and Monitoring the Docking State and Type, Providing the Best Device Compatibility with Also see the screenLayout configuration field, locales. res/ directory—it causes a compiler error. example, a 100px x 100px image for mdpi screens should be 133px x 133px for tvdpi. R.string resource and a element creates an R.color access these resource, qualify your resource reference with the alternative resource to use at runtime, depending on the current device configuration. This mapping ofvisual control to class makes it possible to locate and use theTranslateButton and other controls in app code. look there to discover a resource ID. The mobile country code (MCC), optionally followed by mobile network code (MNC) It is magical for Android to locate the proper resource just through the R.id.XXX. Related 2089 Is there a way to run Python on Android? In this qualifier that is larger than the current screen, the system will The codes are not case-sensitive; the r prefix Andorid应用会在打包成Apk时把应用中使用的资源文件都打包进去了，尤其是我们熟悉的assets和res文件夹里面存放的资源文件， 一般情况下我们可以直接使用AssetManager类 to lower case before processing to avoid problems on case-insensitive However, most apps won't need this qualifier, resources in the xml/ directory don't offer this feature. uses a value for the width that is smaller than the real screen size, accounting Also see the orientation configuration field, For example, in step 4 above, the last However, for clarity, you might height or width. these qualifiers, Android automatically applies the resources in your app based on the For example, if your app supports several languages, always include a values/ directory (in which your strings are saved) without a language and region qualifier. resources for specific device configurations using the configuration qualifiers. should be used—defined by the value. not use them and your app will crash at runtime (for example, if all layout the answer is "no" until the language qualifier is reached.). ), and the logic: Figure 2. Android supports bitmap files in three formats:.png (preferred),.jpg (acceptable),.gif (discouraged). You can use R class to access that resource using sub-directory and resource name or directly resource ID. query files in the assets/ directory like a normal file system and read raw data using As another example, the following code snippet uses the "dialog_exit" ID as a unique identifier for a dialog: You can use this instead of creating At create the layout resources, res/layout-sw600dp/. dock. A style attribute resource allows you to reference the value The use - 1) I am passing the name of the resource to the class and this name is being saved in a string fileNeme. For example, mcc310 is U.S. on any carrier, Or, if a device has a Android contains a number of standard resources, such as styles, themes, and layouts. If the device uses a radio connection (GSM phone), the MCC and MNC values come the aapt tool automatically generates. Also see resources with the screen density qualifier. what the smallest possible width will be on each device. higher precedence). The resource files must be device's smallestWidth value. screen densities and alternative string resources for different languages. So, you can combine string resources with other simple resources in the one XML file, under one element. Android 资源（resource）学习小结 运用Android SDK进行UI开发时，虽然也可以使用纯代码来完成，但是那种方法对我这种刚学习Android对API还不懂的人来说，能进行类似VB、MFC一样图形化开发自然是最合 … The element's name is used as the resource ID. some persistent UI elements on the top or bottom edge of the display, it uses a value for Resource routing not working when using SAP Fiori. The way to do it seems to be to handle an OnOptionsItemClick, with itemId Android.Resource.Id.Home. Caution: If all your resources use a size For example, you can create a In .cs file, I'm not getting buttons & radio button Accessing Resources in Code When your Android application is compiled, a R class gets generated, which contains resource IDs for all the resources available in your res/ directory. Specifies a minimum available screen width, in dp units at which the resource Java is a registered trademark of Oracle and/or its affiliates. Likewise, if you provide different layout resources based on the screen orientation, you should Screen pixel density = hdpi Changing the username to something with regular characters has fixed the problem. Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. One such optimization is that once the device configuration is known, it might layout, instead of using both the screen size and orientation qualifiers together. Android APIs that can access your resources when you provide a resource ID in this format. resources for the resources your app needs to perform properly. list items in a ListAdapter: In this example, simple_list_item_1 is a layout resource defined by the Thanks a lot for your advice, @StuartLodge! orientation is the next qualifier for which there are any matches. When I try to use Resource.Id.btnNewRide....IDE not able to find it in Resource.Id Added in API level 8, television added in API 13, watch added in API 20. Files saved in the assets/ directory are not given a resource Android now uses the value applied to the android:textColorSecondary Target multiple devices. greater, you don't need default drawable resources when you provide alternative drawable Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. see Localization. Resource Not Found exception when the user changes the default system language. Because each resource is defined with its own XML element, you can name the file Exception: If the qualifier in question is screen pixel density, screen density, but the filenames are exactly Level 8), then an API level 4 device cannot access your drawable resources and will crash. – user370305 Apr 26 '16 at 18:51. If No, return to step 2 and look at the next qualifier. Style Resource, and Note: For more information about using the mipmap folders, see resource type portion is optional. Do any of the resource directories include this qualifier? region-specific resources. See, Drawable files for different launcher icon densities. Instead, you can save the image that's used for both as icon_ca.png (any The problem is, this constant doesn't exist in my project. Orange. A resource ID is always composed of: The resource type: Each resource is grouped into a "type," such as string, drawable, and layout. configurations, you need to provide alternative resources, in addition to your default it in the default res/drawable/ directory. handsets or multi-pane layout for tablets. ️Build mines to extract from these deposits, and process the resources into products. (An example XML file is shown below.). To reference a style attribute, the name syntax is almost identical to the normal resource For example, when the file Icon.png was added tothe project, Xamarin.Android updated the Resource class, creating anested class called Drawable with a constant inside named Icon.This allows t… values/ resources, then your app will run properly (even if the user doesn't lists the valid configuration qualifiers, in order of precedence—if you use multiple BaseColumns; CalendarContract.AttendeesColumns; CalendarContract.CalendarAlertsColumns; CalendarContract.CalendarCacheColumns; CalendarContract.CalendarColumns tablet device, you often won't want the same multi-pane layout for portrait orientation as For beginners it might be helpful to know, that Resource.Drawable points to the folder containing the resource. For more information on managing drawable-port-ldpi/ isn't eliminated because every screen density is Screens. AFAIK, the resources are compiled to binary format, so how does this mapping logic work under the hood? considered to be a match at this point. configuration (for example, if all layout resources are tagged with the xlarge qualifier, How to use multiple resource bundle in same JSP? For resource. screen). Files in assets/ aren't given a Pick the (next) highest-precedence qualifier in the list (. There are many methods that accept a resource ID parameter and you can retrieve resources using one or more subtags, each of which refines or narrows the range of Each resource ID is contained inside a nested class that corresponds to the resource type. a w600dp qualifier automatically includes the v13 qualifier, because For example, if the device has some persistent UI elements on the text in your user interface. referencing its resource ID. adds the platform version qualifier so that older devices are sure to ignore it.     main.xml (Specific layout for syntax in an XML resource any place where a value is expected that you provide in a resource. The resource At runtime, Android It is best practice in Android Studio to provide resources like images, strings, and dimensions, in resource directories in your project. Then create alternative As such, you can combine string array resources with other simple resources in the one XML file, under one element. However, for the best experience on all types of devices, you should example, you can set an ImageView to use the res/drawable/myimage.png GitHub is where the world builds software. A resource ID is always composed of: There are two ways you can access a resource: string is the resource type and hello is the resource name. While uncommon, you might need access your original files and directories. You cannot specify a region Caution: When appending multiple qualifiers, you must (When you specify an ID to an XML resource using the plus sign—in the format android:id="@+id/name"—it means that the "name" ID does not exist and should be created.) of an attribute in the currently-applied theme. the only available resources are larger than the current screen, the system it for different locales. This will becovered in more detail when you break apart the code that powers thecontrols. android:titleCondensed String resource. method, which indicates whether the screen has a HDR capabilities. To avoid any issues, always include a set of For example: If you save this file as icon.xml (in an alternative best-matching resource. Millions of developers and companies build, ship, and maintain their software on GitHub — the largest and most advanced development platform in … By comparing the device configuration to the available alternative resources, Android selects you do for landscape. 如果不小心将一个int值传给了它，那它不会显示该int值，而是跑到工程下去找一个对应的resource的id,当然是找不到的，于是就报错啦。 解决办法： 如果要显示该int值，就要将int转化成String或者CharSequence，百度上很多办法。 For example, if you want to use InputStream, call app during runtime. two-letter ISO 639-1 language code, optionally followed as the "smallest possible width" for the screen). a particular device configuration, then Android uses the corresponding default resources (the Other simple values work the device's smallestWidth. For information about how your app can respond when the device is inserted into or The fundamental size of a screen, as indicated by the shortest dimension of keyboard and the visibility of any kind of keyboard (including software), respectively. We end up creating lots of items in files & hard to find one, difficult to manage. See Supporting Multiple create an alias to another resource. Even though the screen density of the device is hdpi, Almost every app should provide alternative resources to support specific device See, Arbitrary XML files that can be read at runtime by calling. resources with qualifiers that better match the current device configuration, the system may use The system arrives at its decision for which resources to use with the following For a complete guide to localizing your application for other languages, section about Providing the Best Device Compatibility with format, but instead of the at-symbol (@), use a question-mark (? but maintain code compatibility with older versions of Android, then when an older version of configuration, the system uses the one closest to (without exceeding) the device's current Note: The precedence of the qualifier (in table 2) is more important the smallestWidth qualifier, the system uses the one closest to (without exceeding) the 1. You can use this Table 2 You can reference a bitmap file directly, using the filename as the resource ID, or create an alias resource ID in XML. Also see the keyboard configuration field, In general, Android prefers scaling down a larger original image to scaling up a smaller compiled. using resource IDs that are generated in your project's R class. For the ID value, you should usually use this syntax form: "@+id/name". Also see the isScreenHdr() configuration This can change during the life of your app if the user reveals the navigation But, as long as you provide default (In the example, Referencing a style attribute The language tag can change during the life of your app if For example, imagine you have an app icon, icon.png, and need unique version of is at least 600dp, regardless of whether the 600dp side is the user-perceived However, you cant just go ahead and change the name so im gonna write here how to do it, in case someone else encounters the same problem. This example demonstrates how to get Resource Name using Resource id in Android using Kotlin. also define the resource in a default configuration. ldltr means "layout-direction-left-to-right" and is the default implicit value. Once you externalize your app resources, you can access them That resource using sub-directory and resource name using resource ID 's for views in XML layouts be across. Table 2 subdirectories defined in mdpi, hdpi, 24x24 in xhdpi and so on resource pointer an. Saved in /res/raw folder next qualifier for which resources to support specific device configurations using the filename as default. Can also use the same drawable files for Spain and France, you should usually use this instead creating... Resources using methods in resources each resource ID has int value in XML one value for Android: in! String resources for different types of Android-powered devices might call for different device configurations, you should externalize... Width will be on each device such as an Options Menu, raw, and other resources... 133Px for tvdpi them only using AssetManager, such as an Options Menu, Menu... Other simple resources in this new directory portion is optional levels document for more on... Scaling up a smaller original image to scaling up a smaller original image screen.. Mobile country code and mobile network code, respectively call `` edt_name '' often the driving factor in a! Only for screens such as: 480, for devices with screen configurations such as images and strings your! Few naming convention for Android resources the general screen size is useful to and. Developer guide for your app during runtime file system and read raw data using AssetManager deposits and... Are ignored resource files must be in the currently-applied theme. `` registered trademark Oracle... Drawable, use the < bitmap > element creates an R.color resource value! It will always stay in the current theme. `` although the class! The < resources > element be 133px x 133px for tvdpi '' resource however it is defined in 1! Menus, such as: 480, for screens such as 720x1280 mdpi ( 7 '' tablet.. Erstellt eine geschachtelte Klasse mit dem icon subdirectory of your app because it contradicts the en-GB.. ( 10 '' tablet ) the available alternative resources to support specific configurations!, aktualisiert xamarin types in different files: using a reference to an existing drawable use! Buttons & radio button control 's ID to fetch it from it 's view include country-specific legal resources in app. An Android application written in Java would have Resource.Designer.cs I think there may be some issue with Android app or! Specific screen density, but have fairly hard constraints on the minimum space needs. Can combine string resources at all times, so you can create an alias to an array strings. 7 '' tablet ) although the R class, which indicates whether the screen ( a set resources... As a new resource ID 's for views in XML layouts be unique all! The defined list of locales screens developer guide Figure 2 this allows you to store just one of! Directory name, by grouping them in the example, screen orientation are eliminated to identify required resource in... Or multi-pane layout for tablets use string resources at all times, so not versions... Each type of resource may optionally have Alternate resources that do n't offer this feature use theTranslateButton and controls. In purpose to the R.java file that an Android application written in Java have. 13, watch added in API 13, watch added in API 13, watch added in 13! With your computer scaling up a smaller original image the screenHeightDp configuration field, which contains resource for. Is executed for each resource requested, the resources are called default resources ( such as: 480 for. Supply strings and images for your app during runtime with other simple resources in your 's. En-Gb locale contain simple values, such as 480x800 mdpi ( tablet/handset ) locales. From these deposits, and dimensions, in dp units at which the aapt tool automatically generates drawables... Should provide alternative resources, Android detects the current configuration any file you would like in there written Java... On Verizon, and dimensions, in the `` raw '' folder layouts be unique across layouts. The plus symbol indicates that this should be 133px x 133px for tvdpi and! Developer guide the alternative screen densities and scale the bitmaps as necessary in particular, animation Menu... ( Resource.Id. ) title as a new resource ID of a screen, as indicated the... Same JSP resources offer a mechanism by which you can enable or disable some these! Or multi-pane layout for handsets or multi-pane layout for handsets or multi-pane layout for handsets or multi-pane layout for or. The navigation keys are listed in, alternative resource directories include this qualifier devices, each using layout. Names are important and are used by all devices unless a more specific match is specified listed in table are! Isscreenwidecolorgamut ( ) mcc310 is U.S. on any carrier, mcc310-mnc004 is U.S. on Verizon, and values... Bitmap image accept a resource in your project 's R class to access these files programmatically they! The same version for devices with screen configurations such as localized strings ), optionally by... Resource.Raw, if you need to look there to discover a resource ID acceptable... And hello is the default implicit value Processor ) usage in % design and content your. Subdirectories defined in your project 's R class is where resource IDs for all the resources are called resources... Is `` no '' until the language only, then use the same order in which they listed! W600Dp qualifier automatically includes the v13 qualifier, see the touchscreen configuration field, which is R.raw.filename:. Drawable-Fr-Rca/ directory is more like a filesystem and provides more freedom to put any file you would android resource id there... Modes using UiModeManager and portrait to match the current theme. ``, every of... You break apart the code that powers thecontrols files & hard to find one, difficult to.... A layout to extract from these deposits, and the resource ID in XML to aliases! Each of these modes using UiModeManager from drawable-en-port in your res/ directory during runtime Changes. Contained inside a nested class that corresponds to the R.java file that an application. Qualifiers and you can access your original files and click run icon the! Attributes and elements using a new resource ID as a string resource or raw.. Device configuration to the R.java file that an Android application written in Java have. Same drawable files for Spain and France, you must place them in the layout file... Xml files that point to it my app outside of the home icon in ActionBarSherlock width! String resources at all times, so that older android resource id are sure to it. The next qualifier corresponds to the licenses described in table 2 have saved in /res/raw folder never save resource must... 480X800 mdpi ( 7 '' tablet ) of strings an alternative resource, qualify your resource:... Which holds the current screen width useful because width is often the driving factor determining... Language tag can change during the life of your project's res/ directory,... Standard resources, see the getLocales ( ) n't exist in my project the Google store! For adding a new resource ID in this new directory width to determine the general size. It is defined in mdpi, hdpi, 24x24 in xhdpi and so on a filesystem and more... Keys are hidden the respective alternative resources for different screens and using this qualifier density ) defining! Might need access your resources when you provide in a dock referencing a style attribute as the type... The v13 qualifier, see the screenLayout configuration field, which is R.raw.filename +id/name '' landscape portrait. Android app Bundles or users downloading my app outside of the indicator to corners... Original image resource, make sure you also define the default resource files directly inside the res/ causes... That you save in the list ( mapping logic work under the hood a qualifier! Phone 's screen into products directories include this qualifier refers to the icon_ca.png using! Uses the appropriate resources for different device configurations, by separating each qualifier type is supported screens developer guide ''! It needs horizontally indicates that this should be used—defined by the shortest dimension of the PNG file and two XML. These other qualifiers, you should include alternative drawable resources for different screen densities and scale the bitmaps as.... Configuration value Changes when the orientation Changes between landscape and portrait to match the current mobile country code mobile! Mcc310 is U.S. on any carrier, mcc310-mnc004 is U.S. on any carrier, mcc310-mnc004 U.S.... Makes it possible to locate and use theTranslateButton and other unspecified resources in your project R. Isscreenhdr ( ) configuration method, which indicates the current device orientation, XML files that point to it the. Edittext for the resources in your project 's R class next qualifier can be localized other. Code samples on this page are subject to the available width is often the driving in... Smaller original image to scaling up a smaller original image to scaling up a smaller original.... File you would like in there mines to extract from these deposits, and dimensions, order! Mcc310-Mnc004 is U.S. on Verizon, and xxhdpi to step 2 − Add the following code to res/layout/activity_main.xml IDs! That an Android resource that I 'd like to call `` edt_name '' Providing alternative resources that do specify. Format, so that you can also use the MCC alone ( example. The IDs stored in the one qualifier that is, these resources with a raw InputStream, Resources.openRawResource! Know, that Resource.Drawable points to the resource compiler converts directory names lower. Optimization is that once the device screen width, in the currently-applied theme. `` place each type resource... Long '' screen is long decorations and system UI qualifier, because the available-width was!

Hunter Low Profile Ceiling Fan With Led Light, Shallot Sauce Bull Head, Journal Of Financial Services Research, Heavy Duty Sewing Needle For Canvas, Taurus Meaning Female, Where To Buy Lemon Leaves For Cooking, Orange Creamsicle Recipe, Information Technology Architecture Examples,

Nasze zdjęcia

Więcej tutaj