android - Android 6 UsageStatsManager isAppInactive() permission

Question

I'm using isAppInactive() method from UsageStatsManager class on Android 6 (API 23) to detect the standby state of the app I'm developing.

The docs affirm that it is necessary to request PACKAGE_USAGE_STATS permission but I'm able to use that method without requesting the permission.

Is this a bug?

Answer 1

有UsageStatsService一个hasPermission [1]方法检查是否PACKAGE_USAGE_STATS授予权限。它用于以下方法：

• queryEvents [2]
• queryConfigurations [3]
• queryUsageStats [4]
• queryAndAggregateUsageStats（它使用相同的方法queryUsageStats）

这是isAppInactive [5]的代码，你可以看到没有请求权限：

@Override
public boolean isAppInactive(String packageName, int userId) {
    try {
        userId = ActivityManagerNative.getDefault().handleIncomingUser(Binder.getCallingPid(),
                Binder.getCallingUid(), userId, false, true, "isAppInactive", null);
    } catch (RemoteException re) {
        return false;
    }
    final long token = Binder.clearCallingIdentity();
    try {
        return UsageStatsService.this.isAppIdleFilteredOrParoled(packageName, userId, -1);
    } finally {
        Binder.restoreCallingIdentity(token);
    }
}

正如您在添加的提交isAppInactive消息中看到的那样（最初被调用isAppIdle，然后被重命名），API 应该是公共的：

Add ability to get and set idle state of apps
Add am shell command to set and get idle
Add public API to check if an app is idle

我不认为这是一个错误，而只是一个不清楚的文档。