ClearEditText在github上的链接地址是：https://github.com/zhangphil/ClearEditText
用法十分简单，在布局中使用ClearEditText，在JAVA中setShakeAnimation()即可。
<RelativeLayout 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:background="#95CAE4"> <com.example.clearedittext.ClearEditText
android:id="@+id/username"
android:layout_marginTop="60dp"
android:layout_width="fill_parent"
android:background="@drawable/login_edittext_bg"
android:drawableLeft="@drawable/icon_user"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
android:singleLine="true"
android:drawableRight="@drawable/delete_selector"
android:hint="输入用户名"
android:layout_height="wrap_content" > </com.example.clearedittext.ClearEditText> <com.example.clearedittext.ClearEditText
android:id="@+id/password"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
android:layout_marginTop="10dip"
android:drawableLeft="@drawable/account_icon"
android:hint="输入密码"
android:singleLine="true"
android:password="true"
android:drawableRight="@drawable/delete_selector"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/username"
android:background="@drawable/login_edittext_bg" >
</com.example.clearedittext.ClearEditText> <Button
android:id="@+id/login"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
android:background="@drawable/login_button_bg"
android:textSize="18sp"
android:textColor="@android:color/white"
android:layout_below="@+id/password"
android:layout_marginTop="25dp"
android:text="登录" /> </RelativeLayout>
package com.example.clearedittext; import android.content.Context;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.view.animation.Animation;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.EditText; public class ClearEditText extends EditText implements
OnFocusChangeListener, TextWatcher {
/**
* 删除按钮的引用
*/
private Drawable mClearDrawable;
/**
* 控件是否有焦点
*/
private boolean hasFoucs; public ClearEditText(Context context) {
this(context, null);
} public ClearEditText(Context context, AttributeSet attrs) {
//这里构造方法也很重要，不加这个很多属性不能再XML里面定义
this(context, attrs, android.R.attr.editTextStyle);
} public ClearEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
} private void init() {
//获取EditText的DrawableRight,假如没有设置我们就使用默认的图片,右边位置图片
mClearDrawable = getCompoundDrawables()[2];
if (mClearDrawable == null) {
// throw new NullPointerException("You can add drawableRight attribute in XML");
mClearDrawable = getResources().getDrawable(R.drawable.delete_selector);
} mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(), mClearDrawable.getIntrinsicHeight());
//默认设置隐藏图标
setClearIconVisible(false);
//设置焦点改变的监听
setOnFocusChangeListener(this);
//设置输入框里面内容发生改变的监听
addTextChangedListener(this);
} /**
* 因为我们不能直接给EditText设置点击事件，所以我们用记住我们按下的位置来模拟点击事件
* 当我们按下的位置 在 EditText的宽度 - 图标到控件右边的间距 - 图标的宽度 和
* EditText的宽度 - 图标到控件右边的间距之间我们就算点击了图标，竖直方向就没有考虑
*/
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_UP) {
if (getCompoundDrawables()[2] != null) { boolean touchable = event.getX() > (getWidth() - getTotalPaddingRight())
&& (event.getX() < ((getWidth() - getPaddingRight()))); if (touchable) {
this.setText("");
}
}
} return super.onTouchEvent(event);
} /**
* 当ClearEditText焦点发生变化的时候，判断里面字符串长度设置清除图标的显示与隐藏
*/
@Override
public void onFocusChange(View v, boolean hasFocus) {
this.hasFoucs = hasFocus;
if (hasFocus) {
setClearIconVisible(getText().length() > 0);
} else {
setClearIconVisible(false);
}
} /**
* 设置清除图标的显示与隐藏，调用setCompoundDrawables为EditText绘制上去
* @param visible
*/
protected void setClearIconVisible(boolean visible) {
Drawable right = visible ? mClearDrawable : null;
setCompoundDrawables(getCompoundDrawables()[0],
getCompoundDrawables()[1], right, getCompoundDrawables()[3]);
} /**
* 当输入框里面内容发生变化的时候回调的方法
*/
@Override
public void onTextChanged(CharSequence s, int start, int count,
int after) {
if(hasFoucs){
setClearIconVisible(s.length() > 0);
}
} @Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) { } @Override
public void afterTextChanged(Editable s) { } /**
* 设置晃动动画
*/
public void setShakeAnimation(){
this.setAnimation(shakeAnimation(5));
} /**
* 晃动动画
* @param counts 1秒钟晃动多少下
* @return
*/
public static Animation shakeAnimation(int counts){
Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);
translateAnimation.setInterpolator(new CycleInterpolator(counts));
translateAnimation.setDuration(1000);
return translateAnimation;
} }