PowerManager.PARTIAL_WAKE_LOCK机器人 [英] PowerManager.PARTIAL_WAKE_LOCK android

问题描述

我很困惑是否获取此wakelock。例如。我有这种类型的code，它是从的onReceive称为（）的 BroadcastReceiever （CONNECTIVITY_CHANGE，BOOT_COMPLETED等）异步也就是我发动 IntentService 从的onReceive（）其执行繁重的任务。

I am very confused whether to acquire this wakelock. E.g. I have this type of code that is called from onReceive() of a BroadcastReceiever (CONNECTIVITY_CHANGE, BOOT_COMPLETED etc) asynchronously i.e. I am launching an IntentService from onReceive() which performs heavy lifting.

private static void insertInDatabase(Context context /*, some data to be inserted in database*/) {
        Database helper = Database.getInstance(context);
        PowerManager pm = (PowerManager) context
            .getSystemService(Context.POWER_SERVICE);
        final WakeLock wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, wakelockName); 
        wakeLock.acquire();
        try { 
            SQLiteDatabase db = helper.getWritableDatabase();
            ContentValues cv = new ContentValues();
            // insert data in database here  
        } finally {
            wakeLock.release();
        }
    }

这是方案中的合适的人选来获取 PowerManager.PARTIAL_WAKE_LOCK ？

推荐答案

由@paha答案忽略了一个很重要的一点：IntentService是不够的。在的onReceive（）结束，IntentService启动手机可能会再次入睡。你需要一个（静态）锁弥合这一差距 - 这是马克Murpphy的 WakefulIntentService实施

The answer by @paha misses an important point : IntentService is not enough. Between onReceive() ends and the IntentService is started the phone might fall asleep again. You need a (static) lock to bridge this gap - this is implemented in Mark Murpphy's WakefulIntentService

因此​​，保持了AlarmManager和接收器，但推出的 WakefulIntentService 的从你的的onReceive（）。

So keep the AlarmManager and receiver but launch a WakefulIntentService from your onReceive().

请参阅：

• <一个href="http://stackoverflow.com/questions/12417541/android-deep-sleep-and-wake-locks/16268293#16268293">Android深睡眠和唤醒锁
• <一个href="http://stackoverflow.com/questions/17471028/powermanager-wakelock-not-waking-device-up-from-service/17496029#17496029">PowerManager wakelock不是从服务中唤醒设备最多

• Android deep sleep and wake locks
• PowerManager wakelock not waking device up from service

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