我正在创建一个闹钟并使用WakeLock在睡着时唤醒手机。
我在我的Activity中使用此代码作为唤醒锁:
library(data.table)#v1.9.5+
setDT(fitchRatings)[,
.SD[which.min(as.numeric(levels(LongTermTransformed))[LongTermTransformed])],
by = .(Country, Year)]
但是当时间满足时,我的应用程序崩溃了这个日志cat错误:
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);
}
我已经添加了对AndroidManifest的许可:
java.lang.IllegalArgumentException: Must specify a valid wake lock level.
我以为我已经指定了唤醒锁等级。我该怎么做才能解决这个问题?请帮我。谢谢
答案 0 :(得分:4)
WindowManager.LaoutParams.FLAG_KEEP_SCREEN_ON
不是PowerManager.newWakeLock()
的有效标记/级别。你很可能打算这样做:
PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP
。
答案 1 :(得分:0)
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
保持屏幕开启。 PARTIAL_WAKE_LOCK
未已弃用且仍可使用。下面是一些示例代码,我的服务唤醒设备,启动相应的活动,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,关闭锁定屏幕,并保持屏幕开启。这些标志必须尽早设置,因此最佳位置在onAttachedToWindow()
@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);
}
如果活动已经开始,则需要重新创建,以便可以设置这些标记。这可以通过在recreate()
onNewIntent()
来完成
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
recreate();
}