android 通過廣播監聽網路連接狀況

標籤：android   style   blog   class   code   java   

首先添加以下許可權

<uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /><uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /><uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" /><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

new一個廣播NetStateChangeBroadcast

package aviationboss.broadcast;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.net.ConnectivityManager;import android.net.NetworkInfo.State;import android.util.Log;import android.widget.Toast;import aviationboss.data.SystemData;public class NetStateChangeBroadcast extends BroadcastReceiver {    private ConnectivityManager connectivity;    private boolean isConnect = false;    @Override    public void onReceive(Context arg0, Intent arg1) {        // TODO Auto-generated method stub        connectivity = (ConnectivityManager) arg0                .getSystemService(arg0.CONNECTIVITY_SERVICE);        State wifiState = connectivity.getNetworkInfo(                ConnectivityManager.TYPE_WIFI).getState();        if (State.CONNECTED == wifiState) {            isConnect = true;        }                if(connectivity.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)!=null){            State mobileState = connectivity.getNetworkInfo(                    ConnectivityManager.TYPE_MOBILE).getState();            if (State.CONNECTED == mobileState) {                isConnect = true;            }        }                Intent intent = new Intent();        intent.setAction("netConnect");        if (isConnect) {            if (!SystemData.NetState) {                Toast.makeText(arg0, "網路已串連", Toast.LENGTH_SHORT).show();                SystemData.NetState = true;                intent.putExtra("netActions", "網路已串連");                arg0.sendBroadcast(intent);            }        } else {            if (SystemData.NetState) {                Toast.makeText(arg0, "網路已斷開", Toast.LENGTH_SHORT).show();                SystemData.NetState = false;                intent.putExtra("netActions", "網路已斷開");                arg0.sendBroadcast(intent);            }        }    }}

判斷wifi的串連狀態

connectivity.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState()

判斷移動網的串連狀態

connectivity.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState()

 

在設定檔中添加該廣播，並設定監聽的動作

<receiver android:name="aviationboss.broadcast.NetStateChangeBroadcast" >    <intent-filter>        <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />    </intent-filter></receiver>