安卓检测设备网络变化

Love The Way You Lie 2022-07-13 13:52 202阅读 0赞

NetWorkStateReceiver

package cn.edu.jlnu.checknetstate.receiver;
    
    import android.content.BroadcastReceiver;
    import android.content.Context;
    import android.content.Intent;
    import android.net.ConnectivityManager;
    import android.net.Network;
    import android.net.NetworkInfo;
    import android.os.Build;
    import android.widget.Toast;
    
    /**
     * Created by Administrator on 2017/1/11.
     */
    
    public class NetWorkStateReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            //检测API是不是小于23
            if(android.os.Build.VERSION.SDK_INT< Build.VERSION_CODES.LOLLIPOP){
                //获取ConnectivityManager对象
                ConnectivityManager manager= (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
                //获取ConnectivityManager对象对应的NetworkInfo对象
                //获取WIFI连接的信息
                NetworkInfo wifiNetInfo=manager.getNetworkInfo(manager.TYPE_WIFI);
                //获取移动数据连接的信息
                NetworkInfo mobileNetworkInfo=manager.getNetworkInfo(manager.TYPE_MOBILE);
                if(wifiNetInfo.isConnected()&&mobileNetworkInfo.isConnected()){
                    Toast.makeText(context,"Wifi已经连接，移动数据已经连接",Toast.LENGTH_SHORT).show();
                }else if(wifiNetInfo.isConnected()&&!mobileNetworkInfo.isConnected()){
                    Toast.makeText(context,"Wifi已经连接,移动数据已经断开",Toast.LENGTH_SHORT).show();
                }else if(!wifiNetInfo.isConnected()&&mobileNetworkInfo.isConnected()){
                    Toast.makeText(context,"Wifi已经断开,移动数据已经连接",Toast.LENGTH_SHORT).show();
                }else{
                    Toast.makeText(context,"Wifi已经断开,移动数据已经断开",Toast.LENGTH_SHORT).show();
                }
    
            }else{
                //获取ConnectivityManager对象
                ConnectivityManager manager= (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
                //获取所有网络连接的信息
                Network[] networks=manager.getAllNetworks();
                //用于存放网络连接的信息
                StringBuilder sb=new StringBuilder();
                //通过循环将网络信息逐个读出来
                if(networks.length==0){
                    Toast.makeText(context,"没有网络信息！",Toast.LENGTH_SHORT).show();
                }else{
                    for(int i=0;i<networks.length;i++){
                        //获取ConnectivityManager对象对应的NetworkInfo对象
                        NetworkInfo networkInfo=manager.getNetworkInfo(networks[i]);
                        sb.append(networkInfo.getTypeName()+"connect is:"+networkInfo.isConnected());
                    }
                    Toast.makeText(context,sb.toString(),Toast.LENGTH_SHORT).show();
                }
            }
        }
    }
    注册注销

@Override
        protected void onPause() {
            super.onPause();
            unregisterReceiver(mReceiver);
            Log.e("liuchen","注销");
        }
    
        //在OnResume方法注册
        @Override
        protected void onResume() {
            super.onResume();
            if(mReceiver==null){
                mReceiver=new NetWorkStateReceiver();
            }
            IntentFilter filter=new IntentFilter();
            filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
            registerReceiver(mReceiver,filter);
            Log.e("liuchen","注册");
        }AndroidManifest.xml