Android 如何访问清单中声明的广播接收器并更改某些属性
我在AndroidManifest.xml中声明了一个接收方:Android 如何访问清单中声明的广播接收器并更改某些属性,android,android-intent,broadcastreceiver,intentfilter,Android,Android Intent,Broadcastreceiver,Intentfilter,我在AndroidManifest.xml中声明了一个接收方: <receiver android:name=".receivers.ConnectionUpdateReceiver"> <intent-filter> <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/> </intent-filter> &
<receiver android:name=".receivers.ConnectionUpdateReceiver">
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
</intent-filter>
</receiver>
public class ConnectionUpdateReceiver extends BroadcastReceiver {
private Listener listener;
public void setListener(Listener listener) {
this.listener = listener;
}
@Override
public void onReceive(Context context, Intent intent) {
ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
final NetworkInfo networkInfo = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (networkInfo != null && networkInfo.isConnected()) {
if (listener != null) {
listener.onWifiConnected(networkInfo);
}
}
}
public interface Listener {
void onWifiConnected(NetworkInfo networkInfo);
}
}
但我不知道传递给IntenetFilter构造函数的是什么,因为
android.net.conn.CONNECTIVITY_CHANGE
无法在此访问。若要侦听网络更改事件,您的活动必须注册侦听连接更改的广播接收器: 例如:
public void onCreate(Bundle savedInstanceState) {
registerReceiver(new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
Log.i(TAG, "Hey, net?");
}}, new IntentFilter("android.net.conn.CONNECTIVITY_CHANGE"));
}
我希望大家支持你的问题
我必须向这个类注册一个侦听器
这是不可能的,因为在Android发送和处理匹配的广播之前,没有清单注册的BroadcastReceiver
我尝试在运行时以通常的方式在活动的onResume中注册此接收器:
registerReceiver(connectionUpdateReceiver, new IntentFilter(...));
只有当你去掉清单条目,这才有意义
但我不知道该传递给IntenetFilter构造函数什么,因为那里无法访问android.net.conn.CONNECTIVITY\u CHANGE
欢迎您将“android.net.conn.CONNECTIVITY\u CHANGE”传递给IntentFilter
构造函数。它也可以作为ConnectivityManager.CONNECTIVITY\u ACTION
提供