EditText TextWatcher

Question

I do login Activity, which has basically EditTexttwo Buttons. It looks like this:

http://img249.imageshack.us/img249/9108/loginm.png http://img249.imageshack.us/img249/9108/loginm.png

EditTexthas TextWatcherwhich verifies the user with AsyncTaskwho enters the web service.

The code:

public class Login extends Activity {

    private EditText mUserNameET;
    private Drawable mCorrect;
    private Drawable mIncorrect;
    private ProgressBar mProgressBar;
    private MyApp mApp;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);

        mApp = (MyApp) getApplication();
        mUserNameET = (EditText) findViewById(R.id.user_name_et);
        mUserNameET.addTextChangedListener(new LoginValidator());

        mCorrect = getResources().getDrawable(R.drawable.correct);
        mIncorrect = getResources().getDrawable(R.drawable.incorrect);
        mProgressBar = new ProgressBar(this);
    }

    private class LoginValidator implements TextWatcher {

        private ValidateUserAsyncTask validator = new ValidateUserAsyncTask();

        @Override
        public void afterTextChanged(Editable s) {

            String value = s.toString();

            if ( value.length() == 0 )
                return;

            /* If it running, cancel it. */
            /* Issue #2 */
            if ( AsyncTask.Status.RUNNING == validator.getStatus() ) {
                validator.cancel(true);
                validator = new ValidateUserAsyncTask();
            } else if ( AsyncTask.Status.FINISHED == validator.getStatus() ) {
                validator = new ValidateUserAsyncTask();
            }

            validator.execute(value);
            /* Issue #1 */
            mUserNameET.setCompoundDrawables(null, null, mProgressBar.getProgressDrawable(), null);
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {
        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before,
                int count) {
        }
    }

    class ValidateUserAsyncTask extends AsyncTask<String, Void, Boolean> {

        @Override
        protected void onPostExecute(Boolean result) {
            super.onPostExecute(result);

            if ( result ) {
                mUserNameET.setCompoundDrawablesWithIntrinsicBounds(null, null, mCorrect, null);
            } else {
                mUserNameET.setCompoundDrawablesWithIntrinsicBounds(null, null, mIncorrect, null);
            }
        }

        @Override
        protected Boolean doInBackground(String... params) {
            return mApp.validateUser(params[0]);
        }
    }
}

My problems:

While it works AsyncTask, I want to show the ProgressBar inside EditText. I tried to do this using:

mUserNameET.setCompoundDrawables(null, null, mProgressBar.getProgressDrawable(), null);

but that will not work.

And I'm also a little worried about creating new instances AsyncTask. Am I a memory leak?

Answer 1

While AsyncTask is working, I want to show the ProgressBar inside the EditText

AnimationDrawable, , setCompoundDrawables().

AsyncTask. ?

, AsyncTask - . , AsyncTask , AsyncTasks, , . , , , 1 , -.

Answer 2

, . , EditText..

http://iserveandroid.blogspot.com/2011/01/how-to-bring-spinner-at-end-of-button.html

http://iserveandroid.blogspot.com/2011_01_01_archive.html