《Android版Web服务器实现(三)HTTP响应》实现了HTTP的响应，那么在界面上要如何控制呢？界面上的控制，只需简单的几个选项。
1、配置web服务的根路径。
2、配置端口。
3、启动与停止服务。
下面是实现的代码。
MainActivity.java
package com.sparkle.webservice;
import java.net.InetAddress;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.InputType;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
private Button _startStop_button = null;
private EditText _root_text = null;
private TextView _ip_text = null;
private EditText _port_text = null;
private MyLog _myLog = new MyLog(getClass().getName());
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
Init();
}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
UiUpdater.registerClient(_handler);
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
UiUpdater.registerClient(_handler);
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
UiUpdater.unregisterClient(_handler);
}
@Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
UiUpdater.unregisterClient(_handler);
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
UiUpdater.unregisterClient(_handler);
}
private void Init() {
FetchUIControls();
BindingEvnents();
InitUI();
}
private void FetchUIControls() {
_startStop_button = (Button) findViewById(R.id.startStop_button);
_root_text = (EditText) findViewById(R.id.root_text);
_ip_text = (TextView) findViewById(R.id.ip_text);
_port_text = (EditText) findViewById(R.id.port_text);
}
private void BindingEvnents() {
if (_startStop_button != null) {
_startStop_button.setOnClickListener(new ClickListener());
}
}
private void InitUI() {
if (_root_text != null) {
_root_text.setText(Defaults.getRoot());
}
if (_port_text != null) {
_port_text.setText(String.format("%1d",Defaults.getPort()));
}
}
@SuppressLint("HandlerLeak")
private Handler _handler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MESSAGES.UPDATE_UI:
UpdateUi();
break;
default:
break;
}
}
};
public void UpdateUi() {
if (WebServer.isRunning()) {
_myLog.l(Log.DEBUG, "updateUi: server is running", true);
_startStop_button.setText(R.string.stop);
_root_text.setEnabled(false);
_port_text.setEnabled(false);
_root_text.setInputType(InputType.TYPE_NULL);
_port_text.setInputType(InputType.TYPE_NULL);
InetAddress address = WebServer.getWifiIp(MainActivity.this);
if (address != null) {
_ip_text.setText("http://" + address.getHostAddress() + ":"
+ WebServer.getPort() + "/");
} else {
_myLog.l(Log.VERBOSE, "Null address from getServerAddress()",
true);
_ip_text.setText(R.string.can_not_get_ip);
}
} else {
_startStop_button.setText(R.string.start);
_ip_text.setText(R.string.can_not_get_ip);
_root_text.setEnabled(true);
_port_text.setEnabled(true);
_root_text.setInputType(InputType.TYPE_CLASS_TEXT);
_port_text.setInputType(InputType.TYPE_CLASS_NUMBER);
}
}
private class ClickListener implements OnClickListener {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.startStop_button: {
StartOrStop();
break;
}
default: {
break;
}
}
}
private void StartOrStop() {
try {
String startString = getString(R.string.start);
String stopString = getString(R.string.stop);
String buttonText = _startStop_button.getText().toString();
if (buttonText.equals(startString)) {
Start();
} else if (buttonText.equals(stopString)) {
Stop();
} else {
// Do nothing
_myLog.l(Log.ERROR, "Unrecognized start/stop text");
}
} catch (Exception e) {
// TODO: handle exception
}
}
private void Start() {
InitSetting();
StartListen();
}
private void InitSetting() {
Defaults.setRoot(_root_text.getText().toString());
Defaults.setPort(Integer.parseInt(_port_text.getText().toString()));
}
private void StartListen() {
Context context = getApplicationContext();
WebServer.Start(context);
}
private void Stop() {
Context context = getApplicationContext();
WebServer.Stop(context);
}
}
}
注：
1、使用Handler来通信，并依据消息更新界面。
2、通过UiUpdater来管理handler。
UiUpdater.java
package com.sparkle.webservice;
import java.util.ArrayList;
import java.util.List;
import android.os.Handler;
public class UiUpdater {
protected static MyLog myLog = new MyLog("UiUpdater");
protected static List clients = new ArrayList();
public static void registerClient(Handler client) {
if(!clients.contains(client)) {
clients.add(client);
}
}
public static void unregisterClient(Handler client) {
while(clients.contains(client)) {
clients.remove(client);
}
}
public static void updateClients() {
for (Handler client : clients) {
client.sendEmptyMessage(MESSAGES.UPDATE_UI);
}
}
}
相关的权限：
实现的效果图
