帶傳回值的多線程樣本

只列出關鍵程式碼片段

class A

new Thread()

        {
            @Override
            public void run()
            {
                String isStop = main_imageview.startAnim();
                if(isStop.equals("stop")){
                System.out.println("loading end,start another activity...");
                }
            }

        }.start();

/**********************************************************************************/

class B implements Callable<String>  //這個類一定要實現Callable介面

public String startAnim()
{
String isstop=null;
try {
isstop = (String) call();
} catch (Exception e) {
e.printStackTrace();
}
return isstop;
}

/* 帶有傳回值的多線程
* @see java.util.concurrent.Callable#call()
*/
@Override
public String call() throws Exception {
while(!isStop)
{
//計時
long currentTime = System.currentTimeMillis();
if((currentTime-startTime)>5000){
return "stop";
}
index = ++index % length;
//重新整理介面
postInvalidate();
try
{
Thread.sleep(400);
}
catch (InterruptedException e)
{
e.printStackTrace();
}
}
return null;
}