这是我的代码:
Activity :
@Override
public void onCreate(Bundle savedInstanceState) {
...
Intent intent = new Intent(this, MyReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(
this.getApplicationContext(), 234324243, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()
+ (5 * 1000), pendingIntent);
...
}
广播接收器:
public class MyReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Intent service = new Intent(context, StartNotificationService.class);
context.startService(service);
}
服务:
public class StartNotificationService extends Service {
@Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
this.intent = intent;
showNotification();
}
private void showNotification() {
Date date = new Date(pror.getFirstMillis());
Log.i("date", date.toString());
Timer timer = new Timer();
TimerTask timerTask = new TimerTask() {
@Override
public void run() {
createNotification(contentTitle, contentText, tickerText);
pror.calculateVak();
pror.setFirstMillis(pror.getNextVak());
createStatusBarNotification(contentTitle, contentText, tickerText);
}
};
timer.schedule(timerTask, date);
}
}
AndroidManifest
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:icon="@drawable/icon"
android:label="@string/app_name" >
<activity android:name=".ShowSettingsActivity" />
<receiver android:name=".MyReceiver"/>
<service android:name=".service.StartNotificationService"/>
<activity android:name=".PreferencesActivity" android:label="@string/app_name">
</activity>
<activity
android:label="@string/app_name"
android:name=".VakActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
当手机进入休眠状态时,alarmManager 无法启动通知/服务。
如果我将手机保持在“Activity ”-解锁状态,则会在特定时间触发通知。
我哪里出错了?
最佳答案
有两种方法可以实现它。
- 如果您所做的只是创建状态栏通知,那么只需在
BroadcastReceiver
中执行此操作 - 如果您需要在发出通知之前运行服务,并且需要在设备处于 sleep 状态时执行此操作,则需要获取
WAKE_LOCK
因此,对于您所需服务的类主体中的方法2:
PowerManager pm;
PowerManager.WakeLock wl;
然后在您的 onCreate
中您需要:
pm = (PowerManager)getSystemService(Context.POWER_SERVICE);
wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "My Tag");
wl.acquire();
然后在您的 onDestroy
中您需要输入:
wl.release();
我从PowerManager
获得的所有这些信息
关于android - AlarmManager 与唤醒,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8858640/