安卓P: UsageStatsManager getAppStandbyBucket

Question

我想用安卓P测试版下的设备显示我的应用程序的电流桶。因此，我尝试像这样使用UsageStatsManager类：

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    if (Build.VERSION.SDK_INT >= 28) {
        UsageStatsManager usageStatsManager = (UsageStatsManager) getSystemService(USAGE_STATS_SERVICE);
        if (usageStatsManager != null) {
            Log.d(TAG, "getAppStandbyBucket():" + usageStatsManager.getAppStandbyBucket()); 
        }
    }
}

我的声明拥有android.permission.PACKAGE_USAGE_STATS的权限：

<uses-permission 
    android:name="android.permission.PACKAGE_USAGE_STATS" 
    tools:ignore="ProtectedPermissions" />

但是当我启动我的应用程序时，我遇到了一次崩溃：

07-24 10:23:39.061 26967-26967/com.app.bucket E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.app.bucket, PID: 26967
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.app.bucket/com.app.bucket.MainActivity}: java.lang.SecurityException: MATCH_ANY_USER flag requires INTERACT_ACROSS_USERS permission at com.android.server.pm.PackageManagerService.getPackageUid:4343 com.android.server.pm.PackageManagerService$PackageManagerInternalImpl.getPackageUid:23964 com.android.server.usage.UsageStatsService$BinderService.getAppStandbyBucket:927 android.app.usage.IUsageStatsManager$Stub.onTransact:274 android.os.Binder.execTransact:731 : Neither user 10118 nor current process has android.permission.INTERACT_ACROSS_USERS.
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.lang.SecurityException: MATCH_ANY_USER flag requires INTERACT_ACROSS_USERS permission at com.android.server.pm.PackageManagerService.getPackageUid:4343 com.android.server.pm.PackageManagerService$PackageManagerInternalImpl.getPackageUid:23964 com.android.server.usage.UsageStatsService$BinderService.getAppStandbyBucket:927 android.app.usage.IUsageStatsManager$Stub.onTransact:274 android.os.Binder.execTransact:731 : Neither user 10118 nor current process has android.permission.INTERACT_ACROSS_USERS.
        at android.os.Parcel.createException(Parcel.java:1942)
        at android.os.Parcel.readException(Parcel.java:1910)
        at android.os.Parcel.readException(Parcel.java:1860)
        at android.app.usage.IUsageStatsManager$Stub$Proxy.getAppStandbyBucket(IUsageStatsManager.java:658)
        at android.app.usage.UsageStatsManager.getAppStandbyBucket(UsageStatsManager.java:479)
        at com.app.bucket.MainActivity.onCreate(MainActivity.java:60)

我似乎错过了一个权限，但即使添加了以下权限：

  <uses-permission
        android:name="android.permission.INTERACT_ACROSS_USERS"
        tools:ignore="ProtectedPermissions" />

我还是有同样的死机。我在想，也许我错过了对权限的运行时调用，但就像文档规定的那样：

注意:这个API上的大多数方法都需要权限android.permission.PACKAGE_USAGE_STATS。但是，声明该权限意味着要使用API，设备的用户仍然需要通过Settings应用程序授予权限。见Settings.ACTION_USAGE_ACCESS_SETTINGS。只返回调用包信息的方法不需要此权限。例如getAppStandbyBucket()和queryEventsForSelf(长，长)。

这没必要。即使知道我试图使用运行时权限，但仍然会崩溃。如果有人看到缺少的东西，我真的很感激你的帮助。

Answer 1

我觉得是个虫子。在问题跟踪器中有一个未解决的问题：https://issuetracker.google.com/issues/111102580。