android編程之多線程編程執行個體分析_Android

本文執行個體講述了android編程之多線程編程實現方法。分享給大家供大家參考。具體分析如下：

該功能與前面《android開發socket編程之udp發送執行個體分析》中一樣，當按下鍵後，發送文字框中資料給PC。不同的是把發送資料的功能放在一個線程socket_send中。

一、環境：

win7 + eclipse + ndk

二、代碼：

主類test_socket.java

package test.soket; //import com.test_button.R; import java.io.DataOutputStream; import java.io.IOException; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; import java.net.Socket; import java.net.SocketException; import java.net.UnknownHostException; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; public class test_socket extends Activity {  public static TextView show;  public static Button press;  public static boolean flag;  /** Called when the activity is first created. */  @Override  public void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.main);   //開闢控制項空間   show = (TextView)findViewById(R.id.editText1);   press = (Button)findViewById(R.id.button1);   flag = false;   soket_send thread = new soket_send();   thread.init();   thread.start();   press.setOnClickListener(new Button.OnClickListener()   {    @Override    public void onClick(View v)    {     flag = true;    }   });  } }

線程類socke_sendt.java:

package test.soket; import java.io.DataOutputStream; import java.io.IOException; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; import java.net.Socket; import java.net.SocketException; import java.net.UnknownHostException; import java.util.LinkedList; import android.media.AudioFormat; import android.media.AudioRecord; import android.media.MediaRecorder; import android.util.Log;  public class soket_send extends Thread {  private static final int MAX_DATA_PACKET_LENGTH = 40;  private byte[] buffer = new byte[MAX_DATA_PACKET_LENGTH];  private DatagramPacket dataPacket;  private DatagramSocket udpSocket;  public void init()  {   try   {    udpSocket = new DatagramSocket(5554);   }   catch (SocketException e)   {    // TODO Auto-generated catch block    e.printStackTrace();   }   dataPacket = new DatagramPacket(buffer, MAX_DATA_PACKET_LENGTH);   String str = "hello,jdh"; //這是要傳輸的資料   byte out [] = str.getBytes(); //把傳輸內容分解成位元組   dataPacket.setData(out);   dataPacket.setLength(out.length);   dataPacket.setPort(5554);   try   {    InetAddress broadcastAddr = InetAddress.getByName("192.168.0.248");    dataPacket.setAddress(broadcastAddr);    udpSocket.send(dataPacket);   }   catch (IOException e)   {    // TODO Auto-generated catch block    e.printStackTrace();   }   }  public void run()  {   while (true)   {    if (test_socket.flag)    {     //獲得輸入框文本     CharSequence str =test_socket.show.getText();     byte out[] = str.toString().getBytes();     dataPacket.setData(out);     dataPacket.setLength(out.length);     try     {             InetAddress broadcastAddr = InetAddress.getByName("192.168.0.248");      dataPacket.setAddress(broadcastAddr);      udpSocket.send(dataPacket);     }     catch (IOException e)     {      // TODO Auto-generated catch block      e.printStackTrace();     }     test_socket.flag = false;    }   }  } }

注意：程式中採用的線程間通訊的方法是把需要共用的變數設定成public屬性

希望本文所述對大家的Android程式設計有所協助。