Android BroadcastReceiver实现网络状态实时监听

/**
 * 网络状态类型改变的监听接口
 */
public interface NetStatusMonitor {
 void onNetChange(boolean netStatus);
}

/**
 * 设置网络状态监听接口
 */
public void setStatusMonitor(NetStatusMonitor netStatusMonitor) {
 this.netStatusMonitor = netStatusMonitor;
}

/**
 * Created by ruancw on 2018/5/27.
 * 网络状态工具类
 */

public class NetUtil {
 //网络未连接
 private static final boolean NETWORK_NONE = false;
 //移动数据或无线网络连接
 private static final boolean NETWORK_AVAILABLE = true;

 /**
  * 获取当前网络状态
  * @param context 上下文对象
  * @return boolean
  */
 public static boolean getNetStatus(Context context) {
  // 获取系统连接管理器对象
  ConnectivityManager connectivityManager = (ConnectivityManager) context
    .getSystemService(Context.CONNECTIVITY_SERVICE);
  //获取网络状态信息
  NetworkInfo activeNetworkInfo = connectivityManager != null ? connectivityManager
    .getActiveNetworkInfo() : null;
  //判断网络NetworkInfo是否不为空且连接
  if (activeNetworkInfo != null && activeNetworkInfo.isConnected()) {
   //网络连接可用
   return NETWORK_AVAILABLE;
   
  } else {
   return NETWORK_NONE;//网络不可用（未连接）
  }
 
 }
}

/**
 * Created by ruancw on 2018/5/27.
 * 用于实时监听app的网络状态
 */

public class NetBroadcastReceiver extends BroadcastReceiver {
 //网络状态监听接口
 private NetStatusMonitor netStatusMonitor;

 @Override
 public void onReceive(Context context, Intent intent) {

  if (intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
   //获取网络状态的类型
   boolean netStatus = NetUtil.getNetStatus(context);
   if (netStatusMonitor != null)
    // 接口传递网络状态的类型到注册广播的页面
    netStatusMonitor.onNetChange(netStatus);
  }
 }

 /**
  * 网络状态类型改变的监听接口
  */
 public interface NetStatusMonitor {
  void onNetChange(boolean netStatus);
 }

 /**
  * 设置网络状态监听接口
  */
 public void setStatusMonitor(NetStatusMonitor netStatusMonitor) {
  this.netStatusMonitor = netStatusMonitor;
 }
}

@Override
protected void onResume() {
 super.onResume();
 //注册网络状态监听的广播
 registerBroadcastReceiver();

}

/**
 * 注册网络状态广播
 */
private void registerBroadcastReceiver() {
 //注册广播
 if (netBroadcastReceiver == null) {
  netBroadcastReceiver = new NetBroadcastReceiver();
  IntentFilter filter = new IntentFilter();
  filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
  registerReceiver(netBroadcastReceiver, filter);
  //设置监听
  netBroadcastReceiver.setStatusMonitor(this);
 }
}

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

@Override
public void onNetChange(boolean netStatus) {
 this.netStatus = netStatus;
 isNetConnect();
}

/**
 * 监听网络状态做出相应改变
 */
private void isNetConnect() {
 Message message=new Message();
 if (netStatus){
  message.what=99;
  handler.sendMessage(message);
 }else {
  UIUtil.toast("当前网络不可用");
  message.what=100;
  handler.sendMessage(message);
 }

}

@SuppressLint("HandlerLeak")
Handler handler = new Handler(){
 @Override
 public void handleMessage(Message msg) {
  super.handleMessage(msg);
  if (msg.what==100){
   tvNet.setVisibility(View.VISIBLE);
  }else {
   tvNet.setVisibility(View.GONE);
  }
 }
};