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我正在尝试在我的应用中接收电源按钮事件。我在我的 Manifest 文件中添加了以下代码,然后在广播接收器类的接收方法中显示了一个 toast,但代码仍然无法正常工作。我错过了什么吗?

 <receiver android:name="com.xxxxx">
    <intent-filter>
        <action android:name="android.intent.action.SCREEN_OFF"></action>
        <action android:name="android.intent.action.SCREEN_ON"></action>
        <action android:name="android.intent.action.ACTION_POWER_CONNECTED"></action>
        <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED"></action>
         <action android:name="android.intent.action.ACTION_SHUTDOWN"></action>
    </intent-filter>
</receiver>

问候

4

1 回答 1

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是的,您想要做的可能只是我想清除的几件事,在屏幕关闭时显示 toast 没有用,还检测电源按钮和屏幕状态是相同的,我将向您展示如何检测屏幕状态并显示 toast只是,但是电源按钮我仍然不知道如何检测它,因为电源按钮仅由系统管理,我认为您需要root来调整或添加电源按钮的功能。这里的任何方式都是您需要的代码:

1 - 你需要一个可以启动/停止检测屏幕状态的活动,一个让你的应用程序在后台运行的服务,最后是广播接收器。因此,您应该从活动开始服务:

startService(new Intent(MainActivity.this, yourservice.class));

完成后确保停止它

stopService(new Intent(MainActivity.this, yourservice.class));

2-这里你的服务应该是这样的:

public class yourservice extends Service{
private BroadcastReceiver mReceiver;

public void onCreate() {
    super.onCreate();
    IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
    filter.addAction(Intent.ACTION_SCREEN_OFF);
    this.mReceiver = new your receiver();
    this.registerReceiver(this.mReceiver, filter);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (yourbroasdcast.screenOff) {
            //here screen is off do your stuff
    } else {
            //here screen is on do your stuff example your toast
Toast.makeText(getApplicationContext(), "write your toast here", Toast.LENGTH_LONG).show();
    }

    return START_STICKY;
}

3 - 你的广播接收器:

public class yourbroadcast extends BroadcastReceiver{

public static boolean screenOff;
@Override
public void onReceive(Context context, Intent intent) {

    if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
        screenOff = true;
    }else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
        screenOff = false;
    }
    Intent i = new Intent(context, yourservice.class);
    i.putExtra("screen state", screenOff);
    context.startService(i);
}

}

4 - 清单应如下所示

<service
        android:enabled="true"
        android:name=".yourservice"/>
    <receiver android:name=".yourbroadcast" android:enabled="true">  
    <intent-filter>
        <action android:name="android.intent.action.SCREEN_OFF" />
        <action android:name="android.intent.action.SCREEN_ON" />
    </intent-filter>
    </receiver>

希望我能帮上忙……如果你需要什么就问我:)

于 2013-08-21T18:48:09.513 回答