以前寫過PC與Android之間經過WIFI通訊(經過Socket,能夠在博客裏面搜索),PC做爲主機,Android做爲客戶機,如今手頭有一臺儀器經過wifi傳輸數據,若是儀器做爲主機發射WIFI熱點信號,Android須要鏈接到該熱點才能進一步進行通訊,可是因爲主機並無鏈接到網絡,因此在該種狀況下Android設備沒法使用網絡實現相關的網絡服務(好比關鍵數據的上傳,網絡數據的獲取等等),因此儀器在開始設計的時候將其做爲客戶端,Android設備做爲主機(網上的相關資料大可能是將Android設備做爲客戶端),當Android設備開啓熱點後,儀器會主動嘗試鏈接固定的熱點信息,其中網絡SSID和密碼已經寫死了,因此須要手機端手動修改熱點名稱:java
在開啓熱點以後,此時手機至關於一個路由器,這個路由器的IP地址是固定的(本人測試過3臺Android設備,其默認的路由器地址:192.168.43.1,iPhone的默認路由器地址:172.20.10.1),這個Demo主要實現的目標是Android設備客戶端發送信息,服務端接受到信息後再發送信息給客戶端。那麼Android設備建立的SocketServer代碼以下:android
只有一個按鈕,實如今線程中啓動相對應的服務,因此在這裏就不上圖了,直接放代碼:服務器
package com.example.socketserver; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.ServerSocket; import java.net.Socket; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.Toast; import com.koushikdutta.async.callback.CompletedCallback; import com.koushikdutta.async.http.WebSocket; import com.koushikdutta.async.http.WebSocket.StringCallback; import com.koushikdutta.async.http.libcore.RequestHeaders; import com.koushikdutta.async.http.server.AsyncHttpServer; import com.koushikdutta.async.http.server.AsyncHttpServer.WebSocketRequestCallback; import com.koushikdutta.async.http.server.AsyncHttpServerRequest; import com.koushikdutta.async.http.server.AsyncHttpServerResponse; import com.koushikdutta.async.http.server.HttpServerRequestCallback; public class MainActivity extends Activity { private Button btnStart; private ServerSocket serverSocket; private BufferedReader in; private PrintWriter out; private Handler hander = new Handler(){ @Override public void handleMessage(Message msg) { // TODO Auto-generated method stub super.handleMessage(msg); String s = (String)msg.obj; Toast.makeText(MainActivity.this, s, Toast.LENGTH_LONG).show(); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btnStart = (Button)findViewById(R.id.button1); btnStart.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub new ServerThread().start();//在新線程中啓動SocketServer... } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } @Override protected void onStop() { // TODO Auto-generated method stub super.onStop(); } private class ServerThread extends Thread{ @Override public void run() { // TODO Auto-generated method stub super.run(); try { // serverSocket = new ServerSocket(50005);//默認的路由器地址爲Address: 192.168.43.1 serverSocket = new ServerSocket(5000); while (true) { Socket clientSocket = serverSocket.accept();//阻塞等待處理... String remoteIP = clientSocket.getInetAddress().getHostAddress(); int remotePort = clientSocket.getLocalPort(); System.out.println("A client connected. IP:" + remoteIP+ ", Port: " + remotePort); System.out.println("server: receiving............."); // 得到 client 端的輸入輸出流,爲進行交互作準備 in = new BufferedReader(new InputStreamReader( clientSocket.getInputStream())); out = new PrintWriter(clientSocket.getOutputStream(), false); // 得到 client 端發送的數據 String tmp = in.readLine(); // String content = new String(tmp.getBytes("utf-8")); System.out.println("Client message is: " + tmp); // 向 client 端發送響應數據 out.println("Your message has been received successfully!."); // 關閉各個流 out.close(); in.close(); Message message = hander.obtainMessage(); message.obj=tmp; hander.sendMessage(message); try { Thread.sleep(100); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }
客戶端實現的代碼與網上相關的資料相差無幾,比較簡單:網絡
package com.example.serverclient; import java.io.BufferedInputStream; 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.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; public class MainActivity extends Activity { private Button sendBtn,sendMessageBtn; private Socket socket; private PrintStream output; private BufferedInputStream bufferedInputStream; private ReadThread readThread; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); sendBtn = (Button) findViewById(R.id.button1); sendMessageBtn = (Button) findViewById(R.id.button2); sendBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub new Thread(runnable).start();//開啓線程 } }); sendMessageBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub sendMessage("hello,i am from client message"); } }); } Runnable runnable = new Runnable() { @Override public void run() { // TODO Auto-generated method stub initClientSocket(); readThread = new ReadThread(); readThread.start(); } }; public void initClientSocket() { try { socket = new Socket("192.168.43.1", 5000); output = new PrintStream(socket.getOutputStream(), true, "gbk"); } catch (UnknownHostException e) { // TODO Auto-generated catch block System.out.println("請檢查端口號是否爲服務器IP"); e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block System.out.println("服務器未開啓"); e.printStackTrace(); } output.println("this is the message from client"); } public byte[] receiveData() { if (socket == null || socket.isClosed()) { try { socket = new Socket("192.168.43.1", 5000); } catch (Exception e) { e.printStackTrace(); } } byte[] data = null; if (socket.isConnected()) { try { bufferedInputStream = new BufferedInputStream(socket.getInputStream()); data = new byte[bufferedInputStream.available()]; bufferedInputStream.read(data); } catch (IOException e) { e.printStackTrace(); } } else { data = new byte[1]; } return data; } private void sendMessage(String str) { output.println(str); } public void closeSocket() { try { output.close(); socket.close(); } catch (IOException e) { System.out.println("error"+e); } } private class ReadThread extends Thread{ @Override public void run() { // TODO Auto-generated method stub super.run(); while (true) { byte[] data = receiveData(); if (data.length > 1) { System.out.println(new String(data)); } } } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } }