1. 新建一个基类BasicActivity.class，在基类中注册网络监听广播NetworkChangeReceiver.class，所有页面的Activity都继承此基类BasicActivity.class

(1)网络状态改变监听类：NetWorkChangReceiver.class

/** * 监听网络状态变化 * Created by Travis on 2017/10/11. */public class NetWorkChangReceiver extends BroadcastReceiver {    /**     * 获取连接类型     *     * @param type     * @return     */    private String getConnectionType(int type) {        String connType = "";        if (type == ConnectivityManager.TYPE_MOBILE) {            connType = "3G网络数据";        } else if (type == ConnectivityManager.TYPE_WIFI) {            connType = "WIFI网络";        }        return connType;    }    @Override    public void onReceive(Context context, Intent intent) {        if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())) {// 监听wifi的打开与关闭，与wifi的连接无关            int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);            Log.e("TAG", "wifiState:" + wifiState);            switch (wifiState) {                case WifiManager.WIFI_STATE_DISABLED:                    break;                case WifiManager.WIFI_STATE_DISABLING:                    break;            }        }        // 监听网络连接，包括wifi和移动数据的打开和关闭,以及连接上可用的连接都会接到监听        if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {            //获取联网状态的NetworkInfo对象            NetworkInfo info = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);            if (info != null) {                //如果当前的网络连接成功并且网络连接可用                if (NetworkInfo.State.CONNECTED == info.getState() && info.isAvailable()) {                    if (info.getType() == ConnectivityManager.TYPE_WIFI || info.getType() == ConnectivityManager.TYPE_MOBILE) {                        Log.i("TAG", getConnectionType(info.getType()) + "连上");                        Toast.makeText(context, getConnectionType(info.getType()) + "连上", Toast.LENGTH_SHORT).show();                    }                } else {                    Log.i("TAG", getConnectionType(info.getType()) + "断开");                    Toast.makeText(context, getConnectionType(info.getType()) + "断开", Toast.LENGTH_SHORT).show();                }            }        }    }}

(2)基类 BasicActivity

/** * Activity基类:实时获取网络状态 * create by Travis1022 on 2017-10-11 */public class BasicActivity extends AppCompatActivity {    private boolean isRegistered = false;    private NetWorkChangReceiver netWorkChangReceiver;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        //注册网络状态监听广播        netWorkChangReceiver = new NetWorkChangReceiver();        IntentFilter filter = new IntentFilter();        filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);        filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);        filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);        registerReceiver(netWorkChangReceiver, filter);        isRegistered = true;    }    @Override    protected void onDestroy() {        super.onDestroy();        //解绑        if (isRegistered) {            unregisterReceiver(netWorkChangReceiver);        }    }}

　(3) 在AndroidManifest.xml中声明广播以及对应的网络权限