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:)