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

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();
    }

}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.sunday.customs.EditTextWithDel
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:hint="输入"
        android:padding="7dp"
        android:singleLine="true" />

    <com.sunday.customs.EditTextWithDel
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:hint="输入"
        android:padding="7dp"
        android:singleLine="true" />

</LinearLayout>