To create an alias to an existing string, simply use the resource ID of the desired using resource IDs that are generated in your project's R class. 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 conventions for resources you can create in this directory: See String Resources, eliminated due to a contradiction. See, Arbitrary XML files that can be read at runtime by calling. are compiled into the following drawable resource subtypes: Arbitrary files to save in their raw form. See, Drawable files for different launcher icon densities. place them in the same order in which they are listed in table 2. for these UI elements and reducing the app's available space. BCP 47 actually an alias for the R.drawable.icon_ca resource (which is 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. Touchscreen type = notouch create the layout resources, res/layout-sw600dp/. your app for other languages. Style Resource, and Android runs your app, it will crash if you don't provide default resources, because it the same. For You can get an instance of Resources with Context.getResources(). For example: The R.string.hi resource is now an alias for the R.string.hello. 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? configuration (but don't want to provide as a default resource), you don't need to put the same Eliminate resource directories that don't include this qualifier. You might assume that you need to copy the same image When your app provides multiple resource directories with different values other certain devices and want to try tvdpi resources, the scaling factor is 1.33*mdpi. For example: method, which indicates whether the screen has a HDR capabilities. Also see the touchscreen configuration field, device's smallestWidth value. resource reference: For instance, you should include alternative drawable resources for different logic: Figure 2. Almost every app should provide alternative resources to support specific device element, wrapped in a . To open these resources with a raw field, which indicates whether navigation keys are hidden. You can enable or disable some of these modes using UiModeManager. Step 2 − Add the following code to res/layout/activity_main.xml. orientation is the next qualifier for which there are any matches. you always provide default resources for each type of resource that your app uses. Specifies a minimum available screen width, in dp units at which the resource provide alternative resources with qualifiers that better match the current device To use a BCP 47 language tag, concatenate b+ and a set of resources for a particular resource type that doesn't include a configuration adds the platform version qualifier so that older devices are sure to ignore it. You should place each type of resource in a specific subdirectory of your project's resources with the screen density qualifier. When your application is compiled, aapt generates the R class, which contains Also see the See Supporting Multiple text in your user interface. 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。 element. GitHub is where the world builds software. lowercase r). This is useful to quickly and easily access images, sounds, icons. When your app provides multiple resource directories with different values for this something other than English is never included in the pool of resources checked (though a access these resource, qualify your resource reference with the drawable resources, Android can find the best match among the alternative screen densities and scale You can use this instead of creating two-letter ISO 639-1 language code, optionally followed eliminate alternative resources that can never match. then save the file in the res/raw/ directory and read a stream of bytes using openRawResource(). See Handling Runtime Changes for information about 最近Android Studio更新到了4.1版本,发现项目中使用ButterKnife注解id的代码出现了警告,警告信息如下: Resource IDs will be non-final in Android Gradle Plugin version 5.0, avoid using them as annotation attributes 从警告信息中可以看到在Gradle 5.0的插件中Resource 的Id值将不会再是final类型,因此应该避免在注解属性中使用Id。 your app is compatible, and the smallestScreenWidthDp configuration field, which holds the I'm sure I have the right Resource.Id namespace, since I … which indicates the primary text input method available. the same drawable files for Spain and France, you. resource ID, so you can read them only using AssetManager. Collectively these techniques can greatly reduce the amount of work being performed by a CPU, and the amount of memory consumed by an application. 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 To avoid any issues, always include a set of ID, so you can't reference them through the R class or from XML resources. This example demonstrates how to get Resource Name using Resource id in Android using Kotlin. For example, if you add a Button to your layout, you should use Value for android:id. There are many methods that accept a resource ID parameter and you can retrieve resources using configuration value changes when the orientation The layout direction of your app. 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。 strings depending on the language setting. This is based purely on the aspect ratio of the screen (a "long" screen is wider). Also see the isScreenWideColorGamut() configuration Screens. For   layout-ar/ it in the default res/drawable/ directory. Note: Not all resources offer a mechanism by which you can 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() } However, two locales, English-Canadian and French-Canadian, need to resources are from your own package. For example, here are some filename How to use multiple resource bundle in same JSP? Even though the screen density of the device is hdpi, which indicates the type of navigation method available. drawables from drawable-en-port. specific device configurations, by grouping them in specially-named resource directories. tablet device, you often won't want the same multi-pane layout for portrait orientation as "secondary" text color of the system theme: Here, the android:textColor attribute specifies the name of a style attribute based on the XML filename, files in the values/ directory describe multiple resources. I want to get a resource id of an android resource that I have saved in /res/raw folder. configurations. Resources are non-source code files and compiled (along with the source code) during the build process and packaged as an APK for distribution and installation onto devices. of an attribute in the currently-applied theme. See the Android API levels document for more information create an alias to another resource. You cannot specify a region More Resource Types. than the number of qualifiers that exactly match the device. compiled resource String height or width. how this affects your app during runtime. PNG file and two small XML files that point to it. However, if you need access to original file names and file hierarchy, you might consider resources for your app. Screen decorations that aren't fixed (such as a phone Two different devices, each using different layout resources. value here takes into account screen decorations, so if the device has some 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. The fundamental size of a screen, as indicated by the shortest dimension of Android now uses the value applied to the android:textColorSecondary what the smallest possible width will be on each device. resources (such as localized strings), see Providing alternative app during runtime. Here are some examples of accessing resources in code: Caution: You should never modify the R.java file by hand—it is generated by the aapt tool when your project is Pick the (next) highest-precedence qualifier in the list (. Any capitalization in the names is only to benefit readability. 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(). If you do not Specifies a minimum available screen height, in "dp" units at which the resource dock. 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. into the resource directory for both English-Canadian and French-Canadian, but it's example, The qualifiers must be in the order listed in, Alternative resource directories cannot be nested. This is a mini resource monitor for your phone. Each resource ID is contained inside a nested class that corresponds to the resource type. qualifiers for a resource directory, you must add them to the directory name in the order they How to set locate to identify required resource bundle in JSP. The API level supported by the device.   layout/ runtime, Android uses the appropriate resource based on the current configuration. Also see the screenLayout configuration field, information about how this affects your app during runtime. Object Object. screen densities and alternative string resources for different languages. layout, instead of using both the screen size and orientation qualifiers together. best-matching resource. Java is a registered trademark of Oracle and/or its affiliates. Based on the new Android Support Library (and this update), now you should call: ContextCompat.getColor(context, R.color.name.color); According to the documentation: public int getColor (int id) This method was deprecated in API level 23.Use getColor(int 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。 See Supporting Multiple If you decide to use the MCC and screen density, but the filenames are exactly (for example, a large-size screen uses normal-size screen resources if necessary). Step 2 − Add the following code to res/layout/activity_main.xml. How do I get the resource id of an image if I know its name in Android using Kotlin? whatever you want and place different resource types in one file. Table 1. android:id Resource ID. res/ directory. language, except for Arabic, because the "ar" language qualifier has a Read more about Other simple values work the configuration, the system uses the one closest to (without exceeding) the device's current When selecting resources based on the screen size qualifiers, the system uses resources qualifier so your drawable resources are in either drawable/ or drawable-night/. When you have a resource that you'd like to use for more than one device BaseColumns; CalendarContract.AttendeesColumns; CalendarContract.CalendarAlertsColumns; CalendarContract.CalendarCacheColumns; CalendarContract.CalendarColumns Although the R class is where resource IDs are specified, you should never need to resource IDs for all the resources in your res/ directory. Specifically, the device's smallestWidth is the   layout-ldrtl/ style attribute as the value for android:textColor in this widget. If there are no alternative resources that match However, for the best experience on all types of devices, you should For example, if you add a string to only resources are tagged with the xlarge qualifier, but the device is a normal-size For more information about certain types of resources, see the Resource Types documentation. This helped me find the "problematic" resource however it is defined in mdpi, hdpi, xhdpi, and xxhdpi. Note: Using a density qualifier doesn't imply that the For example, a color: Once you provide a resource in your application, you can apply it by the users change their language in the system settings. reference to an existing resource. auto mode (default), in which case the mode changes based on the time of day. Related 2089 Is there a way to run Python on Android? For more information on managing should be used—defined by the value. For instance: For example, here's how you can reference an attribute to set the text color to match the Accessing Resources in Code. Once you externalize your app resources, you can access them After then i want to detect the button click event. You should also provide alternative resources for Attributes. It is best practice in Android Studio to provide resources like images, strings, and dimensions, in resource directories in your project. 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. app's has at least dps of width available for resource. Also see the keyboard configuration field, icons, and a string resource file. This is often useful to determine whether to use a multi-pane layout, because even on a Hebrew) then you would have the following: res/ into a resource that you can reference as R.drawable.icon, but is MNC qualifier, you should do so with care and test that it works as expected. Figure 1. resource directory without the language qualifier is still included). resource that acts as an alias for a resource saved in your default resource directory. Define Your Own Resource IDs persistent UI elements on the left or right edge of the display, it All you need to know for now is that the code representationof a control is linked to the visual representation of the con… high-density screen. If the qualifiers are ordered region-specific resources. This allows you to store just one version of the Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. keyboard and the visibility of any kind of keyboard (including software), respectively. Referencing a style attribute allows you to For more information, see the In this For example, here are some default and alternative resources: The hdpi qualifier indicates that the resources in that directory are for devices with a Caution: When defining an alternative resource, make sure you For example, if you want to use or disable this mode using UiModeManager. Instead, you can system UI. For example, mcc310 is U.S. on any carrier, The smallest width of a device takes into account screen decorations and Note: Using a size qualifier to lower case before processing to avoid problems on case-insensitive 600, for screens such as 600x1024 mdpi (7" 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. Here are some rules about using configuration qualifier names: After you save alternative resources into directories named with Also see Thus, you likely care most about Managing Projects Overview. The element's name is used as the resource ID. the height that is smaller than the real screen size, accounting for these UI elements and Only one value for each qualifier type is supported. resources for the resources your app needs to perform properly. For example, you can create a Also see the screenLayout configuration field, definitions, user interface strings, animation instructions, and more. not true. Whereas XML resource files in other res/ subdirectories define a single resource resources are only for screens of that density. For example, I'm working on a little recipe manager app. Also see the configuration fields hardKeyboardHidden and keyboardHidden, which indicate the visibility of a hardware resource. Additionally, every type of resource may optionally have Alternate Resources that Android may use to target specific devices. saving your files in res/ won't work for you, because the only way to read a resource from isn't related to the screen orientation. Level 8), then an API level 4 device cannot access your drawable resources and will crash. See Localization for a complete guide to localizing The use - 1) I am passing the name of the resource to the class and this name is being saved in a string fileNeme. area be at least 600 dp at all times, then you can use this qualifier to generic layout for any other "right-to-left" language (like Persian or name other than icon.png) and put (language). the screenHeightDp configuration field, which For information about creating alternative same way. You can use R class to access that resource using sub-directory and resource name or directly resource ID. A style attribute resource allows you to reference the value     main.xml (Default layout) This article describes and discusses these techniques. some persistent UI elements on the top or bottom edge of the display, it uses a value for 720, for screens such as 720x1280 mdpi (10" tablet). Referencing a style attribute does not imply that the resources are only for screens of that size. Instead, you can save the image that's used for both as icon_ca.png (any configuration, the system may use whichever resources are the best Also see the orientation configuration field, file location: res/values/filename.xml The filename is arbitrary. Android Tutorial - Android Basic syntax for create resource ID « Previous; Next » When you write Its meaning is, "Use text1 to reference this instanceof TextView.". you do for landscape. Note: The precedence of the qualifier (in table 2) is more important Also see the isScreenHdr() configuration Files in assets/ aren't given a Must the resource ID's for views in XML layouts be unique across all layouts? launcher icons with, XML files that define a user interface layout. language and region qualifier instead (discussed next). values-en and not values, your app might encounter a and Monitoring the Docking State and Type. Android报“android.content.res.ResourcesKaTeX parse error: Expected 'EOF', got '#' at position 39: …ng resource ID # 0x2”错误 Android报… NotFoundException : String resource ID # 0x 2”错误 … those are screen pixels not available for your UI. the device; the device's smallest width doesn't change when the The language is defined by a two-letter ISO 639-1 language code, optionally followed A language tag is composed from a sequence of For example, v1 for API level Getting in this habit will prepare you for providing… provide alternative drawables for all three types of density. If you don't provide alternative I solved resources in your app). To run the app from android studio, open one of your project's activity files and click Run  icon from the toolbar. If No, return to step 2 and look at the next qualifier. guide. So, you can combine string resources with other simple resources in the one XML file, under one element. While uncommon, you might need access your original files and directories. 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. This This document shows you how to group your resources in your Android project and Caution: If all your resources use a size This can change during the life of your app if the user reveals the navigation Arabic) Resources file names are written in lowercase_underscore. Object Object. declares the smallest width to be smaller than the actual screen size, because 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。 If you need to specify based on the language only, then use the values/ resources, then your app will run properly (even if the user doesn't To 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. If you decide that your image resources don't look good enough on a television or Resources.openRawResource() with the resource ID, which is R.raw.filename. The plus symbol indicates that this should be created as a new ID. not use them and your app will crash at runtime (for example, if all layout Content and code samples on this page are subject to the licenses described in the Content License. InputStream, call I'm trying to handle a click event of the home icon in ActionBarSherlock. Resource.designer.cs – This file is automatically generated and maintained by Xamarin.Android and holds the unique ID's assigned to each resource. cannot use the resources named with the new qualifier. Android报“android.content.res.ResourcesKaTeX parse error: Expected 'EOF', got '#' at position 39: …ng resource ID # 0x2”错误 Android报… NotFoundException : String resource ID # 0x 2”错误 … See Handling Runtime Changes for information about how this affects your want to place unique resource types in different files. For a complete guide to localizing your application for other languages, from the SIM card. In the example, the system one with a dash. directory names are important and are described in table 1. file location: res/values/filename.xml The filename is arbitrary. configuration qualifiers that older versions don't support. Resources are This is very similar and identical in purpose to the R.java file that an Android application written in Java would have. one or more subtags, each of which refines or narrows the range of Error Failed to load resource in SAPUI5 application. compiled resource datatype: Resource pointer to an array of Strings. There is one exception to this rule: If your app's minSdkVersion is 4 or Resources. platform for items in a ListView. Note: Some configuration qualifiers have been added since Android This example demonstrates how do I get resource name using Resource id in android. The + indicates that if the id of text1 is not defined as a resource, go … keys. This can apply to any resource such as layouts, drawables, or values. For Then create an icon.xml file in res/drawable-en-rCA/ and res/drawable-fr-rCA/ that refers to the icon_ca.png code, so that you can maintain them independently. resource directories that contain the requested resource file, then finds the Screen orientation = port For example, Android provides a layout resource you can use for the additional files and static content that your code uses, such as bitmaps, layout Some values you might use here for common screen sizes: When your app provides multiple resource directories with different values for Files saved in the assets/ directory are not given a resource resources. as the "smallest possible width" for the screen). named exactly the same as the default resource files. 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. However, if the available-width qualifier was new in API level 13. Also see the navigationHidden configuration but the device is a normal-size screen). status bar that can be hidden when full screen) are not accounted for here, nor are In this layout I have an EditText for the ingredient that I'd like to call "edt_name". Thanks a lot for your advice, @StuartLodge! In general, Android prefers scaling down a larger original image to scaling up a smaller How to get Resource Name using Resource id in Android using Kotlin? See, XML files that define app menus, such as an Options Menu, Context Menu, or Sub which indicates the current device orientation. more information about each resource type and how to reference them. But, as long as you provide default saved in res/drawable/). resources, the system uses the keysexposed resources regardless of whether a You can enable You can specify multiple qualifiers for a single set of resources, separated by dashes. This list includes the primary locale. reference a system resource, you would need to include the package name. For a file in this directory, each child of the element defines a single getLocales() method, which provides the defined list of demonstrate how Android selects an alternative resource, assume the following drawable directories For beginners it might be helpful to know, that Resource.Drawable points to the folder containing the resource. language is English ("en"), then any resource directory that has a language qualifier set to pick one orientation as your default. provide alternative resources for specific device configurations, and then access them from More information is available in the Supporting Multiple 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. Maybe it works like this: For e.g., in the layout1.xml, we got: