在下面的广播接收器中,程序在“scpuWakeLock.acquire()”行上遇到“source not found”崩溃;当AlarmReceiver调用类“AlarmAlertWakeLock”时.
知道发生了什么事吗？有没有更好的方法来做我想做的事情？

在一个文件中：

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class AlarmReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(final Context context,Intent intent) {
        AlarmAlertWakeLock.acquirecpuWakeLock(context);

    }    
}

在单独的文件中：

import android.content.Context;
import android.os.PowerManager;

public class AlarmAlertWakeLock {

    private static PowerManager.WakeLock scpuWakeLock;

    static void acquirecpuWakeLock(Context context) {

        if (scpuWakeLock != null) {
            return;
        }
        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);


        scpuWakeLock = pm.newWakeLock(
                PowerManager.PARTIAL_WAKE_LOCK |
                PowerManager.ACQUIRE_CAUSES_WAKEUP,"okTag");
        scpuWakeLock.acquire();
    }

    static void releasecpuLock() {
        if (scpuWakeLock != null) {
            scpuWakeLock.release();
            scpuWakeLock = null;
        }
    }
}