It is very common that the Android's Edit text needs to clear all filled data in one hit, rather than clearing every single text using keyboard's 'X' button.

It is a good practice that enable user to clear all the text using Edit Text drawable.

public class ClearEdit extends AppCompatAutoCompleteTextView implements View.OnTouchListener, View.OnFocusChangeListener, TextWatcher {
    private Drawable clrIcon;
    private OnFocusChangeListener mOnFocusChangeListener;
    private OnTouchListener mOnTouchListener;


    public ClearEdit(final Context context) {
        super(context);
        init(context);
    }

    public ClearEdit(final Context context, final AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    public ClearEdit(final Context context, final AttributeSet attrs, final int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context);
    }

    @Override
    public void setOnFocusChangeListener(OnFocusChangeListener onFocusChangeListener) {
        mOnFocusChangeListener = onFocusChangeListener;
    }

    @Override
    public void setOnTouchListener(OnTouchListener onTouchListener) {
        mOnTouchListener = onTouchListener;
    }

    private void setClearIconVisible(final boolean visible) {
        clrIcon.setVisible(visible, false);
        final Drawable[] compoundDrawables = getCompoundDrawables();
        setCompoundDrawables(
                compoundDrawables[0],
                compoundDrawables[1],
                visible ? clrIcon : null,
                compoundDrawables[3]);
    }

    private void init(final Context context) {
        // add your drawable here
        final Drawable drawable = ContextCompat.getDrawable(context, R.drawable.abc_ic_clear_mtrl_alpha);
        final Drawable wrappedDrawable = DrawableCompat.wrap(drawable); //Wrap the drawable so that it can be tinted pre Lollipop
        DrawableCompat.setTint(wrappedDrawable, getCurrentHintTextColor());
        clrIcon = wrappedDrawable;
        clrIcon.setBounds(0, 0, clrIcon.getIntrinsicHeight(), clrIcon.getIntrinsicHeight());
        setClearIconVisible(false);
        super.setOnTouchListener(this);
        super.setOnFocusChangeListener(this);
        addTextChangedListener(this);
    }
    @Override
    public void onFocusChange(View v, boolean hasFocus) {

        if (hasFocus) {
            setClearIconVisible(getText().length() > 0);
        } else {
            setClearIconVisible(false);
        }





        if (mOnFocusChangeListener != null) {
            mOnFocusChangeListener.onFocusChange(v, hasFocus);
        }
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        final int x = (int) event.getX();
        if (clrIcon.isVisible() && x > getWidth() - getPaddingRight() - clrIcon.getIntrinsicWidth()) {
            if (event.getAction() == MotionEvent.ACTION_UP) {
                setText("");
            }
            return true;
        }
        return mOnTouchListener != null && mOnTouchListener.onTouch(v, event);
    }

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

    }

    @Override
    public void afterTextChanged(Editable s) {

    }

    @Override
    public void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
        if (isFocused()) {
            setClearIconVisible(text.length() > 0);
        }
    }
}