How to fix UnsupportedOperationException android

Question

I am writing an android application that consists of timer with 2 minutes. When timer finishes its 2 minutes alert dialog will prompts with alert ring, Here i wrote the alert ring in a thread when i click ok button in alert dialog it is showing an exception "java.lang.UnsupportedOperationException" please tell me how to solve it this is my activity code:

    public class CounterClass extends CountDownTimer 
    {

        public CounterClass(long millisInFuture, long countDownInterval)
        {
            super(millisInFuture, countDownInterval);

        }

        @SuppressLint("NewApi")
        @TargetApi(Build.VERSION_CODES.GINGERBREAD)
        @Override
        public void onTick(long millisUntilFinished) 
        {
            // TODO Auto-generated method stub

            long millis = millisUntilFinished;
            String hms = String.format("%02d:%02d", TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
                    TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)));
            System.out.println(hms);
            timer_text.setText(hms);
        }

        @Override
        public void onFinish()
        {
            // TODO Auto-generated method stub
            Test_Status=false;
            Time_Completed = true;;
            timer_alert_dialog = new AlertDialog.Builder(LifeTest.this);
            timer_alert_dialog.setIcon(R.drawable.ok);
            timer_alert_dialog.setTitle("2C1 PANEL");
            timer_alert_dialog.setMessage("Test Got Completed");
            timer_alert_dialog.setCancelable(false);


            timer_alert_dialog.setPositiveButton("OK", new DialogInterface.OnClickListener()
            {

                @Override
                public void onClick(DialogInterface dialog, int which)
                {

                    Alert_Thread.stop(); 

                }
            });

            AlertDialog Dialog_Center_Finished = timer_alert_dialog.show();
            TextView message_center_finished = (TextView)Dialog_Center_Finished.findViewById(android.R.id.message);
            message_center_finished.setGravity(Gravity.CENTER);
            Alert_Ring = MediaPlayer.create(LifeTest.this,R.raw.completed);
            Alert_Thread = new Thread(new Runnable()
            {

                @Override
                public void run() 
                {

                    while(true)
                    {
                        Alert_Ring.start();
                    }

                }
            });

            Alert_Thread.start(); 
        }

 }

This is my Logcat:

03-10 12:22:47.024: E/AndroidRuntime(4637): FATAL EXCEPTION: main
03-10 12:22:47.024: E/AndroidRuntime(4637): Process: com.example.testpanel2c1, PID: 4637
03-10 12:22:47.024: E/AndroidRuntime(4637): java.lang.UnsupportedOperationException
03-10 12:22:47.024: E/AndroidRuntime(4637):     at java.lang.Thread.stop(Thread.java:1052)
03-10 12:22:47.024: E/AndroidRuntime(4637):     at java.lang.Thread.stop(Thread.java:1042)
03-10 12:22:47.024: E/AndroidRuntime(4637):     at com.example.testpanel2c1.LifeTest$CounterClass$1.onClick(LifeTest.java:370)
03-10 12:22:47.024: E/AndroidRuntime(4637):     at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:166)
03-10 12:22:47.024: E/AndroidRuntime(4637):     at android.os.Handler.dispatchMessage(Handler.java:110)
03-10 12:22:47.024: E/AndroidRuntime(4637):     at android.os.Looper.loop(Looper.java:193)
03-10 12:22:47.024: E/AndroidRuntime(4637):     at android.app.ActivityThread.main(ActivityThread.java:5292)
03-10 12:22:47.024: E/AndroidRuntime(4637):     at java.lang.reflect.Method.invokeNative(Native Method)
03-10 12:22:47.024: E/AndroidRuntime(4637):     at java.lang.reflect.Method.invoke(Method.java:515)
03-10 12:22:47.024: E/AndroidRuntime(4637):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:824)
03-10 12:22:47.024: E/AndroidRuntime(4637):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:640)
03-10 12:22:47.024: E/AndroidRuntime(4637):     at dalvik.system.NativeStart.main(Native Method)

And ideally as short but complete code as possible - we don't need to see the commented out part, if it's not relevant to the question. — Jon Skeet, Mar 10 '15 at 06:50
What do you think `Thread.stop` does, and what does the documentation say it does? — user253751, Mar 10 '15 at 06:55
@RDDivisionMedequip Please have a look on the [Java Coding Conventions](http://www.oracle.com/technetwork/java/codeconventions-135099.html). You should use [camelCase](https://en.wikipedia.org/wiki/CamelCase) (start with lower case) for you variables. — Alexander_Winter, Mar 10 '15 at 08:39

score 1 · Accepted Answer · edited May 23 '17 at 11:50

1

Do not use Thread.stop(). See this topic to properly close a thread.

edited May 23 '17 at 11:50

Community

1
1

answered Mar 10 '15 at 07:00

ThomasThiebaud

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score 1 · Answer 2 · answered Mar 10 '15 at 07:03

If you read the documentation for Thread.stop you would see that it always throws UnsupportedOperationException. It does not stop the thread.

There is no way to stop a thread; threads must stop themselves. You might create a volatile boolean field, and set it to true when the button is clicked, and make the thread stop looping when it detects the field is true.

How to fix UnsupportedOperationException android

2 Answers2