相关疑难解决方法(0)

我正在阅读AsyncTask,我尝试了下面的简单程序.但它似乎没有用.我怎样才能使它工作？

public class AsyncTaskActivity extends Activity {

    Button btn;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        btn = (Button) findViewById(R.id.button1);
        btn.setOnClickListener((OnClickListener) this);
    }

    public void onClick(View view){
        new LongOperation().execute("");
    }

    private class LongOperation extends AsyncTask<String, Void, String> {
        @Override
        protected String doInBackground(String... params) {
            for(int i=0;i<5;i++) {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            TextView txt = (TextView) findViewById(R.id.output); …

我有一个方法HandlerThread.一个值在内部发生变化Thread,我想将它返回给test()方法.有没有办法做到这一点？

public void test()
{   
    Thread uiThread = new HandlerThread("UIHandler"){
        public synchronized void run(){
            int value; 
            value = 2; //To be returned to test()
        }
    };
    uiThread.start();
}

假设我们有这个简单的例子:

public Example extends Thread{

    String temp;    

    public Example(){
    }

    @Override
    public void run(){
        .
        .
        .
        .
        temp = "a_value";
    }

    public static void main(String[] args) {

        Example th = new Example();
        th.start();
    }

}

Thread完成工作后怎么能给我返回String temp？