带删除的edittext

package com.sixin.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.EditText;

import com.sixin.R;

/**
 * 带删除图标的EditText
 * 
 * @author shidongxue
 * 
 */
public class EditTextWithDel extends EditText {
    private Drawable imgInable;
    private Context mContext;
    private Paint mPaint;

    public EditTextWithDel(Context context) {
        super(context);
        mContext = context;
        init();
    }

    public EditTextWithDel(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        mContext = context;
        init();
    }

    public EditTextWithDel(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
        init();
    }

    private void init() {
        mPaint = new Paint();
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setColor(Color.GRAY);
        imgInable = mContext.getResources().getDrawable(R.drawable.btn_del);
        addTextChangedListener(new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }

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

            @Override
            public void afterTextChanged(Editable s) {
                setDrawable();
            }
        });
        setDrawable();
    }

    // 设置删除图片
    public void setDrawable() {
        if (length() > 0 && isFocused()) {
            setCompoundDrawablesWithIntrinsicBounds(null, null, imgInable, null);
        } else {
            setCompoundDrawablesWithIntrinsicBounds(null, null, null, null);
        }
    }

    @Override
    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
        super.onFocusChanged(focused, direction, previouslyFocusedRect);
        if (focused) {
            setCursorVisible(true);
        } else {
            setCursorVisible(false);
        }
        setDrawable();
    }

    // 处理删除事件
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (imgInable != null && event.getAction() == MotionEvent.ACTION_UP) {
            int eventX = (int) event.getRawX();
            int eventY = (int) event.getRawY();
            Rect rect = new Rect();
            int r = getPaddingRight();
            getGlobalVisibleRect(rect);
            rect.left = rect.right - r - 60;
            rect.right = rect.right - r;
            if (rect.contains(eventX, eventY))
                setText("");
        }
        return super.onTouchEvent(event);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
    }

    @Override
    protected void finalize() throws Throwable {
        super.finalize();
    }

}