android - 获取锁屏的可见性

Question

我如何从服务中检查 KeyGuard（锁屏）是否可见？我想支持原始和自定义锁屏。

Answer 1

仅当设备关闭屏幕时屏幕才会锁定。

您应该扩展BroadcastReceiver和实现onReceive，如下所示：

public class YourBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (Intent.ACTION_SCREEN_OFF.equalsIgnoreCase(intent.getAction())) {
            //screen has been switched off!
        }
    }
}

然后你只需要注册它，当屏幕关闭时你就会开始接收事件：

IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
appBroadcastReceiver = new AppBroadcastReceiver(yourActivity);
registerReceiver(appBroadcastReceiver, filter);

有一种极端情况，用户将他们的设备设置为n在屏幕关闭后锁定几秒钟，您可能需要在广播接收器中添加一个检查ACTION_SCREEN_ON并检查它们之间的时间。