从广播接收器获取唤醒锁时出现问题

发布于 2024-09-14 01:04:10 字数 1325 浏览 6 评论 0原文

我有一个问题。我正在尝试让广播接收器获取唤醒锁,以便我的闹钟将手机从睡眠模式唤醒。

在下面的广播接收器中,当 AlarmReceiver 调用“AlarmAlertWakeLock”类时,程序崩溃,并在“sCpuWakeLock.acquire();”行上出现“找不到源”。 知道发生了什么事吗?有更好的方法来做我想做的事情吗?

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;
        }
    }
}

I have a problem. I am trying to make a broadcast receiver acquire a wake lock so my alarm will wake the phone from sleep mode.

In the broadcast receiver below, the program crashes with "source not found" on line "sCpuWakeLock.acquire(); when the class "AlarmAlertWakeLock" is called by AlarmReceiver.
Any idea what's going on? Is there a better way to do what I'm trying to do?

In one file:

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);

    }    
}

In a separate file:

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;
        }
    }
}

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梦罢 2024-09-21 01:04:10

没关系,我想通了 - 我需要在清单中添加唤醒锁权限:

uses-permission android:name="android.permission.WAKE_LOCK"

现在工作正常!

Never mind, I figured it out - I needed to add wake lock permission to the manifest:

uses-permission android:name="android.permission.WAKE_LOCK"

Works fine now!

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