android编程之多线程编程实例分析
本文实例讲述了android编程之多线程编程实现方法。分享给大家供大家参考。具体分析如下:
该功能与前面《android开发socket编程之udp发送实例分析》中一样,当按下键后,发送文本框中数据给PC。不同的是把发送数据的功能放在一个线程socket_send中。
一、环境:
win7+eclipse+ndk
二、代码:
主类test_socket.java
packagetest.soket; //importcom.test_button.R; importjava.io.DataOutputStream; importjava.io.IOException; importjava.net.DatagramPacket; importjava.net.DatagramSocket; importjava.net.InetAddress; importjava.net.Socket; importjava.net.SocketException; importjava.net.UnknownHostException; importandroid.app.Activity; importandroid.os.Bundle; importandroid.view.View; importandroid.widget.Button; importandroid.widget.TextView; publicclasstest_socketextendsActivity{ publicstaticTextViewshow; publicstaticButtonpress; publicstaticbooleanflag; /**Calledwhentheactivityisfirstcreated.*/ @Override publicvoidonCreate(BundlesavedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.main); //开辟控件空间 show=(TextView)findViewById(R.id.editText1); press=(Button)findViewById(R.id.button1); flag=false; soket_sendthread=newsoket_send(); thread.init(); thread.start(); press.setOnClickListener(newButton.OnClickListener() { @Override publicvoidonClick(Viewv) { flag=true; } }); } }
线程类socke_sendt.java:
packagetest.soket; importjava.io.DataOutputStream; importjava.io.IOException; importjava.net.DatagramPacket; importjava.net.DatagramSocket; importjava.net.InetAddress; importjava.net.Socket; importjava.net.SocketException; importjava.net.UnknownHostException; importjava.util.LinkedList; importandroid.media.AudioFormat; importandroid.media.AudioRecord; importandroid.media.MediaRecorder; importandroid.util.Log; publicclasssoket_sendextendsThread { privatestaticfinalintMAX_DATA_PACKET_LENGTH=40; privatebyte[]buffer=newbyte[MAX_DATA_PACKET_LENGTH]; privateDatagramPacketdataPacket; privateDatagramSocketudpSocket; publicvoidinit() { try { udpSocket=newDatagramSocket(5554); } catch(SocketExceptione) { //TODOAuto-generatedcatchblock e.printStackTrace(); } dataPacket=newDatagramPacket(buffer,MAX_DATA_PACKET_LENGTH); Stringstr="hello,jdh";//这是要传输的数据 byteout[]=str.getBytes();//把传输内容分解成字节 dataPacket.setData(out); dataPacket.setLength(out.length); dataPacket.setPort(5554); try { InetAddressbroadcastAddr=InetAddress.getByName("192.168.0.248"); dataPacket.setAddress(broadcastAddr); udpSocket.send(dataPacket); } catch(IOExceptione) { //TODOAuto-generatedcatchblock e.printStackTrace(); } } publicvoidrun() { while(true) { if(test_socket.flag) { //获得输入框文本 CharSequencestr=test_socket.show.getText(); byteout[]=str.toString().getBytes(); dataPacket.setData(out); dataPacket.setLength(out.length); try { InetAddressbroadcastAddr=InetAddress.getByName("192.168.0.248"); dataPacket.setAddress(broadcastAddr); udpSocket.send(dataPacket); } catch(IOExceptione) { //TODOAuto-generatedcatchblock e.printStackTrace(); } test_socket.flag=false; } } } }
注意:程序中采用的线程间通信的方法是把需要共享的变量设置成public属性
希望本文所述对大家的Android程序设计有所帮助。