android - 解锁屏幕时启动服务

Question

解锁屏幕后如何启动服务？可能是 AlarmAanger 之类的东西!

context.startService(new Intent(context, Widget.class));

Answer 1

为了检测屏幕打开和屏幕关闭，注册一个广播接收器，如:

AndroidManifest.xml:

 <receiver android:name="receiverScreen">
        <intent-filter> 
            <action android:name="android.intent.action.SCREEN_ON" />
            <action android:name="android.intent.action.SCREEN_OFF" />
<action android:name="android.Intent.ACTION_USER_PRESENT" />
        </intent-filter> 
    </receiver>

在 Activity 或服务中:

 try {
              IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);

              filter.addAction(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_USER_PRESENT);

              BroadcastReceiver mReceiver = new receiverScreen();

              registerReceiver(mReceiver, filter);
         } catch (Exception e) {

         }

如果屏幕打开/关闭，系统会通知您的接收代码:

public class receiverScreen extends BroadcastReceiver {

     @Override
     public void onReceive(Context context, Intent intent) {

         if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)){

         }
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)){

         }
if (intent.getAction().equals(Intent.ACTION_USER_PRESENT)){

         }
     }

    }