android 实时检测网络状态

左手的ㄟ右手 2022-06-18 09:22 228阅读 0赞

xml添加权限:

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

onCreate:注册帧听  
NetState receiver = new NetState();  
IntentFilter filter = new IntentFilter();

filter.addAction(ConnectivityManager.CONNECTIVITY\_ACTION);  
this.registerReceiver(receiver, filter);  
receiver.onReceive(this, null);

**添加类:**

class NetState extends BroadcastReceiver{ 
    
        @Override
        public void onReceive(Context context, Intent arg1) {
            ConnectivityManager manager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo gprs = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
            NetworkInfo wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
            if(!gprs.isConnected() && !wifi.isConnected())
            {
                AlertDialog.Builder ab = new AlertDialog.Builder(context);
                ab.setMessage("网络连接断开，请检查网络");
                ab.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // TODO Auto-generated method stub
                        dialog.dismiss();
                    }
                }).show();
    
            }
            else{
                AlertDialog.Builder ab = new AlertDialog.Builder(context);
                ab.setMessage("网络连接成功");
                ab.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // TODO Auto-generated method stub
                        dialog.dismiss();
                    }
                }).show();               
    
            }
        }
    }