获取android 11（API 30）中所有已安装的应用程序，如何获取android 11中安装的所有其他应用程序？

Question

How can we get all installed applications in android 11? for Android 10 it is working fine but when I updated to android 11 then all of them are gone.

Answer 1

From Android 11 Google has introduced a new permission to query all installed apps on android devices. So if you want to get all applications in yours app for some reason then just add following permission in your manifest

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

or for specific category of apps you can use this in your manifest. for example if you want only apps with android.intent.category.HOME category then add this code.

<queries>
   <intent>
     <action android:name="android.intent.action.MAIN" />
     <category android:name="android.intent.category.HOME" />
    </intent>
</queries> 

also you can filter apps more specifically by adding more categories to it like shown below

<queries>
   <intent>
     <action android:name="android.intent.action.MAIN" />
     <category android:name="android.intent.category.HOME,android.intent.category.DEFAULT" />
  </intent>
</queries> 

Answer 2

Update to Above Ali's answer

The queries tag does not work inside the application tag, so you have to add it inside the manifest tag, but outside the application tag like this

<manifest
    <uses-permission
        android:name="android.permission.QUERY_ALL_PACKAGES"
        tools:ignore="QueryAllPackagesPermission" />
    <uses-permission
        android:name="android.permission.PACKAGE_USAGE_STATS"
        tools:ignore="ProtectedPermissions" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
    </application>
    <queries>
        <intent>
            <action android:name="android.intent.action.MAIN" />
        </intent>
    </queries>
</manifest>