自定义带有删除功能的edittext实例，在登录，搜索等地方经常用到可以直接用_an...

package com.sunday.customs;


import com.example.customs.R;

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

/**
 * @author sunday
 * 2013-12-04
 */
public class EditTextWithDel extends EditText {
	private final static String TAG = "EditTextWithDel";
	private Drawable imgInable;
	private Drawable imgAble;
	private Context mContext;

	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() {
		imgInable = mContext.getResources().getDrawable(R.drawable.delete_gray);
		imgAble = mContext.getResources().getDrawable(R.drawable.delete);
		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
	private void setDrawable() {
		if(length() < 1)
			setCompoundDrawablesWithIntrinsicBounds(null, null, imgInable, null);
		else
			setCompoundDrawablesWithIntrinsicBounds(null, null, imgAble, null);
	}
	
	 // 处理删除事件
  @Override
  public boolean onTouchEvent(MotionEvent event) {
    if (imgAble != null && event.getAction() == MotionEvent.ACTION_UP) {
      int eventX = (int) event.getRawX();
      int eventY = (int) event.getRawY();
      Log.e(TAG, "eventX = "  eventX  "; eventY = "  eventY);
      Rect rect = new Rect();
      getGlobalVisibleRect(rect);
      rect.left = rect.right - 50;
      if(rect.contains(eventX, eventY)) 
      	setText("");
    }
    return super.onTouchEvent(event);
  }

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

}