Android's instructions for <uses-feature>

<uses-feature> is mostly used by play. Example:

<uses-featureandroid:name="Android.hardware.touchscreen"  android:required = "true" />

If the device does not have this touchscreen hardware, Play will not install the app on this device. False will still be installed.

Android Apps can declare hardware feature requirements in the app manifest to ensure that they does not get Installe D on devices This does not provide those features. If you is extending an existing app for use on TV, closely review your app ' s manifest for any hardware requirement Declar Ations that might prevent it from being installed on a TV device.

Some features has subfeatures like Android.hardware.camera.front, as described in the Feature Reference. Be sure to mark as required= "false" any subfeatures also used in your app.

For example, my app will use the camera, but it's not necessary. For this I announced the camera's <uses-permission>, but omitted <uses-feature>.

<uses-permissionandroid:name="android.permission. CAMERA  "  />

this time Google Play discovered this <uses-permission>, and will be the camera as necessary to go through the discard, without the camera device will not see my app, which is different from the results I want. Setting to False will not be the problem anymore!

In addition, the app can also determine whether to support this hardware

Check If the camera hardware feature is Available.if (Getpackagemanager (). Hassystemfeature ("Android.hardware.camera" ) {    log.d ("Camera Test", "Camera available!"),} else {    log.d ("Camera Test", "No camera available"). View and edit features only. ");}

Android's instructions for <uses-feature>