【总结备用】Android监听网络状态实现(BroadcastReceiver + Service)

Android网络应用程序开发中，经常要判断网络连接是否可用，因此经常有必要监听网络状态的变化。

Android的网络状态监听可以用BroadcastReceiver来接收网络状态改变的广播，具体实现如下：

/** * ConnectionChangeReceiver *  * @author benny Yang on 2011-12-23 * */public class ConnectionChangeReceiver extends BroadcastReceiver {    private static final String TAG =ConnectionChangeReceiver.class.getSimpleName();        @Override     public void onReceive(Context context, Intent intent) {     Log.e(TAG, "网络状态改变");     boolean success = false;     //获得网络连接服务     ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);     // State state = connManager.getActiveNetworkInfo().getState();     // 获取WIFI网络连接状态    State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();     // 判断是否正在使用WIFI网络     if (State.CONNECTED == state) {    success = true;     }     // 获取GPRS网络连接状态     state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();    // 判断是否正在使用GPRS网络     if (State.CONNECTED == state){     success = true;     }     if (!success) {     Toast.makeText(context, context.getString(R.string.your_network_has_disconnected), Toast.LENGTH_LONG).show();     }      }

记得在Manifest文件里面进行权限声明，和广播接收器注册。

< !-- Needed to check when the network connection changes -->
< uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
< receiver android:name="you_package_name.ConnectionChangeReceiver" android:label="NetworkConnection">
< intent-filter>
< action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
< /intent-filter>
< /receiver>

使用方式一：

1. 在Activity的onCreate中:
//注册网络监听
IntentFilter filter = new IntentFilter();
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
registerReceiver(mNetworkStateReceiver, filter);
2. 在Activity中的onDestroy中:
//取消监听
unregisterReceiver(mNetworkStateReceiver);

使用方式二：

1. 应用启动时，启动Service，在Service的onCreate方法中注册网络监听：

//注册网络监听
IntentFilter filter = new IntentFilter();
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
registerReceiver(mNetworkStateReceiver, filter);

2. 应用退出时，Service关闭，在Service的onDestroy方法中取消监听：
//取消监听
unregisterReceiver(mNetworkStateReceiver);

更多相关文章

随机推荐