<pre name="code" class="java" style="font-size: 13.3333px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong><u>效果图:</u></strong></span>
<span style="font-family:Arial, Helvetica, sans-serif;"><strong><u>
</u></strong></span>
<span style="font-family:Arial, Helvetica, sans-serif;"><strong><u><img src="https://img-blog.csdn.net/20160911123735879" alt="" />
</u></strong></span>
<img src="https://img-blog.csdn.net/20160911123801629" alt="" />
package myself.cleanedittext;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.InputFilter;
import android.text.Selection;
import android.text.Spanned;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.EditText;
/**
* Description: 在焦点变化时和输入内容发生变化时均要判断是否显示右边clean图标
* Copyright : Copyright (c) 2016
* Email : [email protected]
* Author : Jusenr
* Date : 2016/9/11 0011 上午 11:11
*/
public class CleanableEditText extends EditText implements View.OnFocusChangeListener, TextWatcher {
private Drawable mRightDrawable;
private boolean isHasFocus;
private int maxLength;
public CleanableEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initStyteable(context, attrs);
init();
}
public CleanableEditText(Context context, AttributeSet attrs) {
super(context, attrs);
initStyteable(context, attrs);
init();
}
public CleanableEditText(Context context) {
super(context);
init();
}
private void initStyteable(Context context, AttributeSet attrs) {
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CleanableEditText);
maxLength = a.getInteger(R.styleable.CleanableEditText_maxLength, Integer.MAX_VALUE);
a.recycle();
}
private void init() {
Drawable[] drawables = getCompoundDrawables();
mRightDrawable = drawables[2];
if (mRightDrawable == null)
if (isInEditMode())
mRightDrawable = getResources().getDrawable(android.R.drawable.presence_offline);
else
mRightDrawable = getResources().getDrawableForDensity(android.R.drawable.presence_offline,
getResources().getDisplayMetrics().densityDpi);
setOnFocusChangeListener(this);//设置焦点变化的监听
addTextChangedListener(this);//设置EditText文字变化的监听
setClearDrawableVisible(false);//初始化时让右边clean图标不可见
}
public void setMaxLenght(int maxLength) {
this.maxLength = maxLength;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_UP:
boolean isClear = (event.getX() > (getWidth() - getTotalPaddingRight())) &&
(event.getY() < (getWidth() - getPaddingRight()));
if (isClear) setText("");
break;
}
return super.onTouchEvent(event);
}
@Override
public void onFocusChange(View v, boolean hasFocus) {
isHasFocus = hasFocus;
if (isHasFocus) {
boolean isVisible = getText().length() >= 1;
setClearDrawableVisible(isVisible);
} else {
setClearDrawableVisible(false);
}
}
@Override
public void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
Editable editable = getText();
int len = editable.length();
if (len > maxLength) {
int selEndIndex = Selection.getSelectionEnd(editable);
String str = editable.toString();
//截取字符串
String newStr = str.substring(0, maxLength);
setText(newStr);
editable = getText();
//新字符串的长度
int newLen = editable.length();
if (selEndIndex > newLen)//旧光标位置超过字符串长度
selEndIndex = editable.length();
Selection.setSelection(editable, selEndIndex);
setSelection(newLen);
} else {
setSelection(len);
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
boolean isVisible = getText().length() >= 1;
setClearDrawableVisible(isVisible);
}
/**
* 隐藏或者显示右边clean的图标
*
* @param isVisible 是否显示
*/
private void setClearDrawableVisible(boolean isVisible) {
Drawable rightDrawable;
if (isVisible)
rightDrawable = mRightDrawable;
else
rightDrawable = null;
setCompoundDrawables(getCompoundDrawables()[0], getCompoundDrawables()[1], rightDrawable, getCompoundDrawables()[3]);
}
/**
* 显示一个动画,以提示用户输入
*/
public void setShakeAnimation() {
this.setAnimation(shakeAnimation(5));
}
/**
* CycleTimes动画重复的次数putao
*
* @param CycleTimes 重复的次数
* @return 动画实例
*/
public Animation shakeAnimation(int CycleTimes) {
Animation translateAnimation = new TranslateAnimation(0, 10, 0, 10);
translateAnimation.setInterpolator(new CycleInterpolator(CycleTimes));
translateAnimation.setDuration(1000);
return translateAnimation;
}
public static class EmojiInputFilter implements InputFilter {
@Override
public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
return filterEmoji(source);
}
}
public static CharSequence filterEmoji(CharSequence source) {
if (!containsEmoji(source)) {
return source;//如果不包含,直接返回
} else {
return "";
}
}
private static boolean containsEmoji(CharSequence source) {
int len = source.length();
for (int i = 0; i < len; i++) {
char codePoint = source.charAt(i);
if (isEmojiCharacter(codePoint)) {
return true;
}
}
return false;
}
private static boolean isEmojiCharacter(char codePoint) {
boolean temp = (codePoint == 0x0) || (codePoint == 0x9)
|| (codePoint == 0xA) || (codePoint == 0xD)
|| ((codePoint >= 0x20) && (codePoint <= 0xD7FF))
|| ((codePoint >= 0xE000) && (codePoint <= 0xFFFD))
|| ((codePoint >= 0x10000)
&& (codePoint <= 0x10FFFF));
return !temp;
}
}
.../res/values/attrs.xml
<pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?>
<resources>
<!--CleanableEditText-->
<declare-styleable name="CleanableEditText">
<attr name="maxLength" format="integer" />
</declare-styleable>
</resources>
.../res/drawable/close_selector.xml
<pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/btn_20_close_p_sel" android:state_pressed="true" />
<item android:drawable="@drawable/btn_20_close_p_nor" android:state_pressed="false" />
</selector>
使用:
<pre name="code" class="html"> <myself.cleanedittext.CleanableEditText
android:id="@+id/et_nickname"
android:layout_width="match_parent"
android:layout_height="44dp"
android:background="#fff"
android:drawableRight="@drawable/close_selector"
android:hint="这里显示用户昵称"
android:maxLength="20"
android:maxLines="1"
android:paddingLeft="10dp"
android:textColor="#313131" />