Question

Thread thread;     

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_yippi);  
final Handler hn=new Handler();
final TextView text=(TextView)findViewById(R.id.TextView01);
final Runnable r = new Runnable()
{
    public void run() 
    {
        text.settext("hi");
    }
};
thread = new Thread()
{

    @Override
    public void run() {
        try {
            while(true) {
                sleep(1750);
                hn.post(r);
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
};
    thread.start();
thread.stop();}

The code here. I can not stop the runnable thread. Also, thread.stop() and thread.destroy() are deprecated. Can somebody help me? And also I don’t understand how to stop the thread with the thread.interrupt() method. What’s wrong?

Answer 1

The JavaDoc for Thread.stop() lists the following article as explanation for why stop() is deprecated: http://docs.oracle.com/javase/6/docs/technotes/guides/concurrency/threadPrimitiveDeprecation.html

Most uses of stop should be replaced by code that simply modifies some variable to indicate that the target thread should stop running. The target thread should check this variable regularly, and return from its run method in an orderly fashion if the variable indicates that it is to stop running. To ensure prompt communication of the stop-request, the variable must be volatile (or access to the variable must be synchronized).

interrupt() is more suitable to stop some Thread from waiting for something, that is probably not coming anymore. If you want to end the thread, it’s best to let its run() method return.