Android.support.v7.app.AppCompatActivity Base class for activities that use the support library action bar features. You can add an ActionBar to your activity when running on API level 7 or higher by extending this class for your activity and setting the activity theme to Theme.AppCompat or a similar theme. Nov 12, 2013 For example, when creating the the v7 appcompat project, add both the android-support-v4.jar and android-support-v7-appcompat.jar files to the build path. (don't import v4 now. It could be create incompatibilities if your project already imported it).
Android Support V7 Appcompat Jar Download For Android Studio FreeIn this document
See also
How you setup the Android Support Libraries in your development project depends on what features you want to use and what range of Android platform versions you want to support with your application.
This document guides you through downloading the Support Library package and adding libraries to your development environment.
Downloading the Support Libraries
The Android Support Library package is provided as a supplemental download to the Android SDK and is available through the Android SDK Manager. Follow the instructions below to obtain the Support Library files.
To download the Support Library through the SDK Manager:
Android-support-v7-appcompat.jar Download For Android Studio
Figure 1. The Android SDK Manager with theAndroid Support Library selected.
After downloading, the tool installs the Support Library files to your existing Android SDK directory. The library files are located in the following subdirectory of your SDK:
<sdk>/extras/android/support/ directory.
Choosing Support Libraries
Before adding a Support Library to your application, decide what features you want to include and the lowest Android versions you want to support. For more information on the features provided by the different libraries, see Support Library Features.
Adding Support Libraries
In order to use a Support Library, you must modify your application's project's classpath dependencies within your development environment. You must perform this procedure for each Support Library you want to use.
Appcompat V7 Download
Some Support Libraries contain resources beyond compiled code classes, such as images or XML files. For example, the v7 appcompat and v7 gridlayout libraries include resources.
If you are not sure if a library contains resources, check the Support Library Features page. The following sections describe how to add a Support Library with or without resources to your application project.
Adding libraries without resources
To add a Support Library without resources to your application project:
Adding libraries with resources
To add a Support Library with resources (such as v7 appcompat for action bar) to your application project:
Create a libraryproject based on the support library code:
You now have a library project for your selected Support Library that you can use with one or more application projects.
Add the library to your application project:
Note: If you are using the
android-support-v7-mediarouter support library, you should note that it depends on the android-support-v7-appcompat library. In order for the v7 mediarouter library to compile, you must import both library projects into your development workspace. Then follow the procedure above to add the v7 appcompat project as a library to the v7 mediarouter library project.
Using Support Library APIs
Support Library classes that provide support for existing framework APIs typically have the same name as framework class but are located in the
android.support class packages, or have a *Compat suffix.
Caution: When using classes from the Support Library, be certain you import the class from the appropriate package. For example, when applying the
ActionBar class:
Note: After including the Support Library in your application project, we strongly recommend using the ProGuard tool to prepare your application APK for release. In addition to protecting your source code, the ProGuard tool also removes unused classes from any libraries you include in your application, which keeps the download size of your application as small as possible. For more information, see ProGuard.
Further guidance for using some Support Library features is provided in the Android developer training classes, guides and samples. For more information about the individual Support Library classes and methods, see the
android.support packages in the API reference.
Manifest Declaration Changes
If you are increasing the backward compatibility of your existing application to an earlier version of the Android API with the Support Library, make sure to update your application's manifest. Specifically, you should update the
android:minSdkVersion element of the <uses-sdk> tag in the manifest to the new, lower version number, as shown below:
The manifest setting tells Google Play that your application can be installed on devices with Android 2.1 (API level 7) and higher.
If you are using Gradle build files, the
minSdkVersion setting in the build file overrides the manifest settings.
In this case, the build file setting tells Google Play that the default build variant of your application can be installed on devices with Android 2.2 (API level 8) and higher. For more information about build variants, see Build System Overview.
Note: If you are including the v4 support and v7 appcompat libraries in your application, you should specify a minimum SDK version of
'7' (and not '4' ). The highest support library level you include in your application determines the lowest API version in which it can operate.
Code Samples
Each Support Library includes code samples to help you get started using the supportAPIs. The code is included in the download from the SDK Manager and is placed inside the AndroidSDK installation directory, as listed below:
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Note: With the release of Android 9.0 (API level 28) there is a new version of the support library called AndroidX which is part of Jetpack. The AndroidX library contains the existing support library and also includes the latest Jetpack components.
You can continue to use the support library. Historical artifacts (those versioned 27 and earlier, and packaged as android.support.* ) will remain available on Google Maven. However, all new library development will occur in the AndroidX library.We recommend using the AndroidX libraries in all new projects. You should also consider migrating existing projects to AndroidX as well.
How you setup the Android Support Libraries in your development project depends on what features you want to use and what range of Android platform versions you want to support with your application.
This document guides you through downloading the Support Library package and adding libraries to your development environment.
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The support libraries are now available through Google's Mavenrepository. We no longer support downloading the libraries through the SDKManager, and that functionality will be removed soon.
Choosing Support Libraries
Before adding a Support Library to your application, decide what features you want to include and the lowest Android versions you want to support. For more information on the features provided by the different libraries, see Support Library Features.
Adding Support Libraries
In order to use a Support Library, you must modify your application's project's classpath dependencies within your development environment. You must perform this procedure for each Support Library you want to use.
To add a Support Library to your application project:
Caution: Using dynamic dependencies (for example,
palette-v7:23.0.+ ) can cause unexpected version updates and regression incompatibilities. We recommend that you explicitly specify a library version (for example, palette-v7:28.0.0 ).
Using Support Library APIs
Support Library classes that provide support for existing framework APIs typically have the same name as framework class but are located in the
android.support class packages, or have a *Compat suffix.
Caution: When using classes from the Support Library, be certain you import the class from the appropriate package. For example, when applying the
ActionBar class:
Note: After including the Support Library in your application project, we strongly recommend that you shrink, obfuscate, and optimize your app for release. In addition to protecting your source code with obfuscation, shrinking removes unused classes from any libraries you include in your application, which keeps the download size of your application as small as possible.
Further guidance for using some Support Library features is provided in the Android developer training classes, guides and samples. For more information about the individual Support Library classes and methods, see the
android.support packages in the API reference.
Manifest Declaration Changes
If you are increasing the backward compatibility of your existing application to an earlier version of the Android API with the Support Library, make sure to update your application's manifest. Specifically, you should update the
android:minSdkVersion element of the <uses-sdk> tag in the manifest to the new, lower version number, as shown below:
The manifest setting tells Google Play that your application can be installed on devices with Android 4.0 (API level 14) and higher.
If you are using Gradle build files, the
minSdkVersion setting in the build file overrides the manifest settings.
In this case, the build file setting tells Google Play that the default build variant of your application can be installed on devices with Android 4.1 (API level 16) and higher. For more information about build variants, see Build System Overview.
Note: If you are including several support libraries, the minimum SDK version must be the highest version required by any of the specified libraries. For example, if your app includes both the v14 Preference Support library and the v17 Leanback library, your minimum SDK version must be 17 or higher.
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