我正在创建一个闹钟,并在睡觉时使用WakeLock唤醒手机。
我在活动中使用此代码进行唤醒锁定:
public void onCreate(Bundle savedInstateState) {
super.onCreate(savedInstateState);
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON | PowerManager.ACQUIRE_CAUSES_WAKEUP, "My Wake Log");
mWakeLock.acquire();
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN |
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON,
WindowManager.LayoutParams.FLAG_FULLSCREEN |
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
setContentView(R.layout.activity_screen);
}
但当时间到了,我的应用程序崩溃了,出现了日志猫错误:
java.lang.IllegalArgumentException: Must specify a valid wake lock level.
我已经为AndroidManifest:添加了权限
<uses-permission android:name="android.permission.WAKE_LOCK" />
我想我已经指定了唤醒锁定级别。我能做些什么来解决这个问题?请帮帮我。谢谢
WindowManager.LaoutParams.FLAG_KEEP_SCREEN_ON
不是PowerManager.newWakeLock()
的有效标志/级别。你最有可能的意图是:
PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP
。
正确的解决方案如下:将ACQUIRE_CAUSES_WAKEUP
与PARTIAL_WAKE_LOCK
结合使用以唤醒设备。然后使用WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
保持屏幕打开。PARTIAL_WAKE_LOCK
已弃用而不是,并且仍然有效。这里有一些示例代码,我的服务唤醒设备,启动适当的活动,并使用唤醒锁保持设备运行,直到活动有时间设置必要的标志以保持设备和屏幕打开。
// start the activity, wake up the screen if required. This would typically
// be done in an onReceive() method, or in my case it's when a Bluetooth device has been connected.
PowerManager pm = (PowerManager) getApplicationContext().getSystemService(Context.POWER_SERVICE);
final PowerManager.WakeLock wakeLock = pm.newWakeLock((PowerManager.PARTIAL_WAKE_LOCK|PowerManager.ACQUIRE_CAUSES_WAKEUP), "BlueMaxService");
wakeLock.acquire();
Intent intent = new Intent(this, EmaxActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
handler.postDelayed(new Runnable() {
@Override
public void run() {
wakeLock.release();
}
}, 10000L);
在活动中,我设置了各种标志来打开屏幕、解除锁定屏幕和保持屏幕打开。这些标志必须很早设置,所以最好在onAttachedToWindow()
中
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON |
WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD |
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
}
如果活动已经启动,则需要重新创建它,以便可以设置这些标志。这可以通过调用onNewIntent()
中的recreate()
来完成
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
recreate();
}