Android Clearable EditText

ClearableEditText

package com.tryear.jandroidlib.widget;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.EditText;

/**
 * <p/>
 * Created by JAY on 2015/4/18.
 */
public class ClearableEditText extends EditText implements View.OnTouchListener,
        View.OnFocusChangeListener, TextWatcher {


    public interface ClearListener {
        void didClearText();
    }

    public void setClearListener(ClearListener clearListener) {
        this.clearListener = clearListener;
    }

    private Drawable clearDrawable;
    private ClearListener clearListener;

    public ClearableEditText(Context context) {
        super(context);
        init();
    }

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

    public ClearableEditText(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    @Override
    public void setOnTouchListener(OnTouchListener l) {
        this.l = l;
    }

    @Override
    public void setOnFocusChangeListener(OnFocusChangeListener f) {
        this.f = f;
    }

    private OnTouchListener l;
    private OnFocusChangeListener f;

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (getCompoundDrawables()[2] != null) {
            boolean tappedX = event.getX() > (getWidth() - getPaddingRight() - clearDrawable
                    .getIntrinsicWidth());
            if (tappedX) {
                if (event.getAction() == MotionEvent.ACTION_UP) {
                    setText("");
                    if (clearListener != null) {
                        clearListener.didClearText();
                    }
                }
                return true;
            }
        }
        if (l != null) {
            return l.onTouch(v, event);
        }
        return false;
    }

    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        if (hasFocus) {
            setClearIconVisible(isNotEmpty(getText()));
        } else {
            setClearIconVisible(false);
        }
        if (f != null) {
            f.onFocusChange(v, hasFocus);
        }
    }

    @Override
    public void onTextChanged(CharSequence s, int start, int count, int after) {
        if (isFocused()) {
            setClearIconVisible(isNotEmpty(s));
        }
    }

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

    }

    @Override
    public void afterTextChanged(Editable s) {

    }

    private void init() {
        clearDrawable = getCompoundDrawables()[2];
        if (clearDrawable == null) {
            clearDrawable = getResources()
                    .getDrawable(android.R.drawable.presence_offline);
        }
        clearDrawable.setBounds(0, 0, clearDrawable.getIntrinsicWidth(), clearDrawable.getIntrinsicHeight());
        setClearIconVisible(false);
        super.setOnTouchListener(this);
        super.setOnFocusChangeListener(this);
        addTextChangedListener(this);
    }

    protected void setClearIconVisible(boolean visible) {
        boolean wasVisible = (getCompoundDrawables()[2] != null);
        if (visible != wasVisible) {
            Drawable x = visible ? clearDrawable : null;
            setCompoundDrawables(getCompoundDrawables()[0],
                    getCompoundDrawables()[1], x, getCompoundDrawables()[3]);
        }
    }

    private boolean isNotEmpty(CharSequence str) {
        return !TextUtils.isEmpty(str);
    }
}