广播判断网络状态

来源：互联网发布：帝国时代3兵种数据编辑：程序博客网时间：2024/05/16 06:21

联网权限与网络状态权限
<uses-permission android:name="android.permission.INTERNET"></uses-permission><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
注册广播

<receiver android:name=".MainActivity$MyBroadcast"></receiver>

package com.example.mybroadcastreceiver;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.Toast;public class MainActivity extends AppCompatActivity {    private MyBroadcast myBroadcast;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //实例化内部类        myBroadcast = new MyBroadcast();        //动态注册        IntentFilter filter=new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);        registerReceiver(myBroadcast,filter);    }   public class MyBroadcast extends BroadcastReceiver    {        @Override        public void onReceive(Context context, Intent intent) {            //得到网络连接状态管理            ConnectivityManager manager= (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);            //网络连接状态            NetworkInfo info = manager.getActiveNetworkInfo();            //!=null为有网状态            if(info!=null)            {                Toast.makeText(MainActivity.this, "网络连接,做有网操作", Toast.LENGTH_SHORT).show();            }            else            {                Toast.makeText(MainActivity.this, "网络无连接,做无网操作", Toast.LENGTH_SHORT).show();            }        }    }    @Override    protected void onDestroy() {        super.onDestroy();        //动态广播需要销毁        unregisterReceiver(myBroadcast);    }}

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