Android杂谈之网络实时监测

Android监测网络状态分四步步进行

1.定义一个广播接收者

private BroadcastReceiver myNetReceiver = new BroadcastReceiver() {                 @Override         public void onReceive(Context context, Intent intent) {                      String action = intent.getAction();                if (action.equals(ConnectivityManager.CONNECTIVITY_ACTION)) {                                         mConnectivityManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);                    netInfo = mConnectivityManager.getActiveNetworkInfo();                    TextView networkState = (TextView) MainActivity.this.findViewById(R.id.network_state);                   if(netInfo != null && netInfo.isAvailable()) {                                                 String name = netInfo.getTypeName();                         if(netInfo.getType()==ConnectivityManager.TYPE_WIFI || netInfo.getType()==ConnectivityManager.TYPE_ETHERNET || netInfo.getType()==ConnectivityManager.TYPE_MOBILE){                      //网络连接 ,隐藏控件                     networkState.setVisibility(View.GONE);                       }                      } else {                          //网络断开 ，显示控件                      networkState.setVisibility(View.VISIBLE);                   }                }                     }     };

2.重写onDestroy()，在Activity销毁时注销广播

@Override    public void onDestroy() {         super.onDestroy();        //注销广播        if(myNetReceiver!=null){                unregisterReceiver(myNetReceiver);         }    }

3.在onCreate方法中注册广播

//注册广播IntentFilter mFilter = new IntentFilter();mFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);registerReceiver(myNetReceiver, mFilter);

最后别忘了配置权限

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

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