您好我是Android的新手,我几乎完成了我的应用程序。但我现在坚持这个问题。我想运行一项仅在互联网连接或断开连接时才能运行的服务。我使用了Brodcast接收器,并在应用程序的活动中注册了brodcast。但是,当我尝试app被杀时它不起作用,接收器被调用,但它显示没有连接互联网。
Brodcast Receiver:
public class ImageDownloadReceiver extends BroadcastReceiver {
public static boolean isConnected(Context context){
ConnectivityManager
cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
return activeNetwork != null
&& activeNetwork.isConnectedOrConnecting();
}
@Override
public void onReceive(Context context, Intent intent) {
Log.i("Info", "onReceive in ImageDownloadReceiver get called ... ");
if(isConnected(context)){
Log.i("Info", "Internet connected !!!...Service starts ... ");
Intent myService = new Intent(context, ImagesDownloadService.class);
context.startService(myService);
}else{
Log.i("Info", "Internet disconnected !!!...Service stops ... ");
Intent myService = new Intent(context, ImagesDownloadService.class);
context.stopService(myService);
}
}
}
清单:
<receiver
android:name=".receiver.ImageDownloadReceiver"
android:enabled="true"
android:exported="true"
android:label="RestartServiceWhenStopped">
<intent-filter>
<action android:name="com.example.app.RestartImageDownloadService"/>
<action
android:name="android.net.conn.CONNECTIVITY_CHANGE" />
<action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
<action android:name="android.net.wifi.STATE_CHANGE" />
</intent-filter>
</receiver>
答案 0 :(得分:0)
我建议您更喜欢使用JobScheduler来处理您的案例。 JobScheduler为您提供服务和许多条件来启动服务。当然,这些条件包括互联网连接。 在这里:https://developer.android.com/reference/android/app/job/JobScheduler.html