标签:
线程间通讯
java
方法一 通过访问共享变量的方式(注:需要处理同步问题)
通过内部类实现线程的共享变量
通过实现Runnable接口实现线程的共享变量
方法二 通过管道流
方法一 通过内部类实现线程的共享变量
public class Innersharethread {
public static void main(String[] args) {
Mythread mythread = new Mythread();
mythread.getThread().start();
mythread.getThread().start();
mythread.getThread().start();
mythread.getThread().start();
}
}
class Mythread {
int index = 0;
private class InnerThread extends Thread {
public synchronized void run() {
while (true) {
System.out.println(Thread.currentThread().getName()
+ "is running and index is " + index++);
}
}
}
public Thread getThread() {
return new InnerThread();
}
}
方法二(通过管道流)
public class CommunicateWhitPiping {
public static void main(String[] args) {
/**
* 创建管道输出流
*/
PipedOutputStream pos = new PipedOutputStream();
/**
* 创建管道输入流
*/
PipedInputStream pis = new PipedInputStream();
try {
/**
* 将管道输入流与输出流连接 此过程也可通过重载的构造函数来实现
*/
pos.connect(pis);
} catch (IOException e) {
e.printStackTrace();
}
/**
* 创建生产者线程
*/
Producer p = new Producer(pos);
/**
* 创建消费者线程
*/
Consumer c = new Consumer(pis);
/**
* 启动线程
*/
p.start();
c.start();
}
}
/**
* 生产者线程(与一个管道输入流相关联)
*
*/
class Producer extends Thread {
private PipedOutputStream pos;
public Producer(PipedOutputStream pos) {
this.pos = pos;
}
public void run() {
int i = 8;
try {
pos.write(i);
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 消费者线程(与一个管道输入流相关联)
*
*/
class Consumer extends Thread {
private PipedInputStream pis;
public Consumer(PipedInputStream pis) {
this.pis = pis;
}
public void run() {
try {
System.out.println(pis.read());
} catch (IOException e) {
e.printStackTrace();
}
}
}
android
android提供了以下几种方法,用于实现后台线程与UI线程的交互。
更新UI的5种方式 1.handler机制 2.Asynctask-实际 FutureTask Handler 封装 3.Activity中的runOnUIThread - mHandler.post(action); - Handler.sendMessageDelayed(getPostMessage(r), 0); 4.view.post(Runnable); 5.view.postDelayed(Runnable,long);
handler机制
View -
public boolean post(Runnable action) {
final AttachInfo attachInfo = mAttachInfo;
if (attachInfo != null) {
return attachInfo.mHandler.post(action);
}
// Assume that post will succeed later
ViewRootImpl.getRunQueue().post(action);
return true;
}
public boolean postDelayed(Runnable action, long delayMillis) {
final AttachInfo attachInfo = mAttachInfo;
if (attachInfo != null) {
return attachInfo.mHandler.postDelayed(action, delayMillis);
}
// Assume that post will succeed later
ViewRootImpl.getRunQueue().postDelayed(action, delayMillis);
return true;
}
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原文地址:http://my.oschina.net/kylinhuang/blog/472142