Android Socket通信(下)
Android Socket通信(下)
在Android Socket通信(上),我们完成了一个模拟器上运行的android socket通信实例程序:
今天我们将它移植到真实的android手机上,不过要先确保环境配置正确,请参考上一讲。
主机的lwan0的ip地址是路由器自动分配的:192.168.1.100,android手机的ip地址是路由器自动分配的:192.168.1.101,可以在主机上ping手机,理论上是通的,不过很奇怪,我经常会碰到ping不通的情况,然后我在android手机里装了一个模拟终端,ping主机,一般都是通的,难道是android手机的问题?
下面直接上代码,和上一讲的代码基本没有差别,改动的部分如下:
1.
ip地址修改过了
2.
端口由9400改为了9500(呵呵,这是任意的,不改也可以的)
2.
src/RealclientActivity.java
- package real.client.com;
- import java.io.IOException;
- import java.io.PrintStream;
- import java.net.Socket;
- import java.net.UnknownHostException;
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.View;
- import android.widget.Button;
- import android.widget.EditText;
- import android.widget.Toast;
- public class RealclientActivity extends Activity
- {
- /* 服务器地址 */
- private final String SERVER_HOST_IP = "192.168.1.100";
- /* 服务器端口 */
- private final int SERVER_HOST_PORT = 9500;
- private Button btnConnect;
- private Button btnSend;
- private EditText editSend;
- private Socket socket;
- private PrintStream output;
- public void toastText(String message)
- {
- Toast.makeText(this, message, Toast.LENGTH_LONG).show();
- }
- public void handleException(Exception e, String prefix)
- {
- e.printStackTrace();
- toastText(prefix + e.toString());
- }
- /** Called when the activity is first created. */
- @Override
- public void onCreate(Bundle savedInstanceState)
- {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- initView();
- btnConnect.setOnClickListener(new Button.OnClickListener()
- {
- @Override
- public void onClick(View v)
- {
- initClientSocket();
- }
- });
- btnSend.setOnClickListener(new Button.OnClickListener()
- {
- @Override
- public void onClick(View v)
- {
- sendMessage(editSend.getText().toString());
- }
- });
- }
- public void initView()
- {
- btnConnect = (Button)findViewById(R.id.btnConnect);
- btnSend = (Button)findViewById(R.id.btnSend);
- editSend = (EditText)findViewById(R.id.sendMsg);
- btnSend.setEnabled(false);
- editSend.setEnabled(false);
- }
- public void closeSocket()
- {
- try
- {
- output.close();
- socket.close();
- }
- catch (IOException e)
- {
- handleException(e, "close exception: ");
- }
- }
- private void initClientSocket()
- {
- try
- {
- /* 连接服务器 */
- socket = new Socket(SERVER_HOST_IP, SERVER_HOST_PORT);
- /* 获取输出流 */
- output = new PrintStream(socket.getOutputStream(), true, "utf-8");
- btnConnect.setEnabled(false);
- editSend.setEnabled(true);
- btnSend.setEnabled(true);
- }
- catch (UnknownHostException e)
- {
- handleException(e, "unknown host exception: " + e.toString());
- }
- catch (IOException e)
- {
- handleException(e, "io exception: " + e.toString());
- }
- }
- private void sendMessage(String msg)
- {
- output.print(msg);
- }
- }
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