erasing EditText and EditView in Android

This is linked to a previous post:
My layout is like this:

INPUT TEXT (EditText)

BUTTON

OUTPUT TEXT (TextView)

Task:
When the user enters an input & upon button click the output text appears.
I have to make sure I make the input & output disappear some 10 seconds after the button click(and after the output text appears).

Now, I cannot add a “TextWatcher” on TextView.
Initially I tried to use Handler on inputText which can have a TextWatcher. But somehow the Handler keeps running all the time in the background & I cannot “cancel” it.

So I switched to using timers. I used a method in the button onCick() method:

onClick(){...    eraseText();....}public void eraseText(){TimerTask task = new TimerTask() {            public void run() {               inputText.setText("");               outputText.setText("");            }        };        Timer timer = new Timer();        timer.schedule(task, 1000,10000);}

And after 10 seconds I would like to call timer.cancel() ( yet don’t know where!!)
As you can see the problem is that I obtain an error complaining that only UI threads can alter views. How can do this ?

Thanks

I would use Handler class. You can easily post delayed code & cancel it. It will run in correct Thread. Also, you can add TextWatcher or OnFocusChangeListener to detect & cancel text erasing when a user starts editing text again.

Handler handler;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    handler = new Handler();    final TextView textView = (TextView) findViewById(R.id.textView2);    final EditText editText = (EditText) findViewById(R.id.editText1);    final Runnable eraseText = new Runnable() {        @Override        public void run() {            textView.setText("");            editText.setText("");        }    };    editText.addTextChangedListener(new TextWatcher() {        @Override        public void onTextChanged(CharSequence s, int start, int before, int count) {            handler.removeCallbacks(eraseText);        }        @Override        public void beforeTextChanged(CharSequence s, int start, int count,                int after) {            // TODO Auto-generated method stub        }        @Override        public void afterTextChanged(Editable s) {            // TODO Auto-generated method stub        }    });    editText.setOnFocusChangeListener(new OnFocusChangeListener() {        @Override        public void onFocusChange(View arg0, boolean arg1) {            handler.removeCallbacks(eraseText);        }    });    findViewById(R.id.button1).setOnClickListener(new OnClickListener() {        @Override        public void onClick(View arg0) {            textView.setText(editText.getText().toString());            handler.removeCallbacks(eraseText);            handler.postDelayed(eraseText, 1000);        }    });}