Android 网络监听

1.添加权限

    <uses-permission android:name="android.permission.INTERNET"/>                   <!-- 网络权限 -->
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>       <!-- 网络检测 -->

2.BaseActivity

public class BaseActivity extends Activity {

    private OnNetListener onNetListener;
    protected NetBroadcastReceiver netBroadcastReceiver;

    /**
     * 注册net广播
     */
    @Override
    protected void onStart() {
        // TODO Auto-generated method stub
        IntentFilter filter = new IntentFilter();
        filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
        netBroadcastReceiver = new NetBroadcastReceiver();
        registerReceiver(netBroadcastReceiver, filter);
        super.onStart();
    }

    @Override
    protected void onStop() {
        // TODO Auto-generated method stub
        super.onStop();
    }
    /**
     * 关闭net广播
     */
    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        unregisterReceiver(netBroadcastReceiver);
    }

    /**
     * 网络广播监听
     * @author Administrator
     *
     */
    class NetBroadcastReceiver extends BroadcastReceiver{

        @Override
        public void onReceive(Context context, Intent intent) {
            // TODO Auto-generated method stub
            int NetType = -1;
            String NetName = "没有网络";
            ConnectivityManager mConnectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo netInfo = mConnectivityManager.getActiveNetworkInfo();
            if(netInfo != null && netInfo.isAvailable()){
                switch (netInfo.getType()) {
                case ConnectivityManager.TYPE_MOBILE:NetType = 0;break;
                case ConnectivityManager.TYPE_WIFI:NetType = 1;break;
                case ConnectivityManager.TYPE_ETHERNET:NetType = 2;break;
                default:
                    break;
                }
                NetName = netInfo.getTypeName();
            }
            onNetListener.onNetLoader(NetType,NetName);

        }


    }
    public void setOnNetListener(OnNetListener onNetListener){
        this.onNetListener = onNetListener;
    }
    public abstract interface OnNetListener{
        /**
         * -1 ：无网络   0:2g/3G     1：wifi 2：有线网
         * @param netType
         * @param NetName
         */
        public abstract void onNetLoader(int netType,String NetName);
    }

}

1. 继承BaseActivity ,在使用的地方调用回调函数

setOnNetListener(new OnNetListener() {
            @Override
            public void onNetLoader(int netType, String NetName) {
                // TODO Auto-generated method stub
                Toast.makeText(LoginActivity.this, NetName, Toast.LENGTH_SHORT).show();
            }
        });