[英]Android Internet Connection checker OUTSIDE the app
每当连接互联网时,我的应用程序都需要执行某些操作,反之亦然。 不过,我需要做的这超出了我的申请。 有很多的想法,并帮助这里计算器,但它总是内的应用程序。 我知道AlarmManager在应用程序外部运行,但是如果我每隔5分钟检查一次Internet连接,那只会耗尽电池电量。 我想要的是检查应用程序外部的连接以下载某些内容。
我还发现Intent Service也可以在应用程序外部运行。 我试图将其放入Wakeful Broadcast Receiver中。 但是,它仍然没有被调用。
有人可以帮我吗? 谢谢!
这是我的唤醒广播接收器
public class ConnectivityOutsideAppReceiver extends WakefulBroadcastReceiver {
private static final String LOG_TAG = ConnectivityOutsideAppReceiver.class.getSimpleName();
private ConnectivityManager connectivityManager;
private static boolean connection = false;
@Override
public void onReceive(Context context, Intent intent){
ComponentName comp = new ComponentName(context.getPackageName(),
ConnectivityOutsideAppService.class.getName());
// Start the service, keeping the device awake while it is
// launching.
startWakefulService(context, (intent.setComponent(comp)
));
}
}
这是意向服务
公共类ConnectivityOutsideAppService扩展了IntentService {
private static final String LOG_TAG = ConnectivityOutsideAppService.class.getSimpleName();
private ConnectivityManager connectivityManager;
private static boolean connection = false;
private Context context;
public ConnectivityOutsideAppService() {
super(ConnectivityOutsideAppService.class.getSimpleName());
this.context = context;
}
@Override
protected void onHandleIntent(Intent intent) {
connectivityManager =
(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
checkConnectionOnDemand();
Log.e(LOG_TAG, " ## onHandleIntent##");
if (connection == true
&& intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY,
false)) {
Log.e(LOG_TAG, " ## connection == true ##");
connection = false;
} else if (connection == false
&& !intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY,
false)) {
Log.e(LOG_TAG, " ## connection == false ##");
connection = true;
}
ConnectivityOutsideAppReceiver.completeWakefulIntent(intent);
}
public static boolean hasConnection() {
return connection;
}
private void checkConnectionOnDemand() {
Log.e(LOG_TAG, " ## checkConnectionOnDemand ##");
final NetworkInfo info = connectivityManager.getActiveNetworkInfo();
if (info == null || info.getState() != NetworkInfo.State.CONNECTED) {
if (connection == true) {
Log.e(LOG_TAG, " ## connection == true ##");
connection = false;
}
} else {
if (connection == false) {
Log.e(LOG_TAG, " ## connection == false ##");
connection = true;
}
}
}
}
这是我的Android清单
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<service
android:name="com.timetrackermobilelog.BusinessServices.ConnectivityOutsideAppService"
android:exported="false"/>
<receiver android:name="com.timetrackermobilelog.Utilities.ConnectivityOutsideAppService"
android:enabled="true"
android:process=":remote">
<intent-filter android:priority="1000" >
<action android:name="com.timetrackermobilelog.Utilities.ConnectivityOutsideAppService" />
<category android:name="com.Utilities" />
</intent-filter>
</receiver>
我已经尝试在Activity中注册接收者,但效果不佳。
IntentFilter intentFilter = new IntentFilter("com.pointwest.timetrackermobilelog.Utilities.ConnectivityOutsideAppReceiver");
ConnectivityOutsideAppReceiver connectivityOutsideAppReceiver = new ConnectivityOutsideAppReceiver();
registerReceiver(connectivityOutsideAppReceiver, intentFilter);
有什么我想念的吗?
感谢@Mike M.做出了几处更改,就给出了答案。
在Android清单中,将其更改为:
<intent-filter android:priority="1000" >
<action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
</intent-filter>
然后将该服务的onHandleIntent更改为:
connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
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