package com.mjj.clearedittext;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.v4.content.ContextCompat;
import android.support.v4.graphics.drawable.DrawableCompat;
import android.support.v7.widget.AppCompatEditText;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.animation.Animation;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
/**
* Created by 家杰 on 2015/11/20.
*/
public class ClearEditText extends AppCompatEditText {
//按钮资源
private final int CLEAR = R.drawable.clearfill;
//动画时长
private final int ANIMATOR_TIME = 200;
//按钮左右间隔,单位DP
private final int INTERVAL = 5;
//清除按钮宽度,单位DP
private final int WIDTH_OF_CLEAR = 23;
//间隔记录
private int Interval;
//清除按钮宽度记录
private int mWidth_clear;
//右内边距
private int mPaddingRight;
//清除按钮的bitmap
private Bitmap mBitmap_clear;
//清除按钮出现动画
private ValueAnimator mAnimator_visible;
//消失动画
private ValueAnimator mAnimator_gone;
//是否显示的记录
private boolean isVisible = false;
//右边添加其他按钮时使用
private int mRight = 0;
public ClearEditText(final Context context) {
super(context);
init(context);
}
public ClearEditText(final Context context,final AttributeSet attrs) {
super(context, attrs);
init(context);
}
public ClearEditText(final Context context,final AttributeSet attrs,final int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context);
}
private void init(Context context) {
mBitmap_clear = createBitmap(CLEAR,context);
Interval = dp2px(INTERVAL);
mWidth_clear = dp2px(WIDTH_OF_CLEAR);
mPaddingRight = Interval + mWidth_clear + Interval ;
mAnimator_gone = ValueAnimator.ofFloat(1f, 0f).setDuration(ANIMATOR_TIME);
mAnimator_visible = ValueAnimator.ofInt(mWidth_clear + Interval,0).setDuration(ANIMATOR_TIME);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
//设置内边距
setPadding(getPaddingLeft(), getPaddingTop(), mPaddingRight+ mRight, getPaddingBottom());
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.setDrawFilter(new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG));//抗锯齿
if (mAnimator_visible.isRunning()) {
int x = (int) mAnimator_visible.getAnimatedValue();
drawClear(x,canvas);
invalidate();
}else if (isVisible){
drawClear(0,canvas);
}
if(mAnimator_gone.isRunning()){
float scale = (float) mAnimator_gone.getAnimatedValue();
drawClearGone(scale, canvas);
invalidate();
}
}
/**
* 绘制清除按钮出现的图案
* @param translationX 水平移动距离
* @param canvas
*/
protected void drawClear( int translationX,Canvas canvas){
int right = getWidth()+getScrollX() - Interval - mRight +translationX;
int left = right-mWidth_clear;
int top = (getHeight()-mWidth_clear)/2;
int bottom = top + mWidth_clear;
Rect rect = new Rect(left,top,right,bottom);
canvas.drawBitmap(mBitmap_clear, null, rect, null);
}
/**
* 绘制清除按钮消失的图案
* @param scale 缩放比例
* @param canvas
*/
protected void drawClearGone( float scale,Canvas canvas){
int right = (int) (getWidth()+getScrollX()- Interval - mRight -mWidth_clear*(1f-scale)/2f);
int left = (int) (getWidth()+getScrollX()- Interval - mRight -mWidth_clear*(scale+(1f-scale)/2f));
int top = (int) ((getHeight()-mWidth_clear*scale)/2);
int bottom = (int) (top + mWidth_clear*scale);
Rect rect = new Rect(left,top,right,bottom);
canvas.drawBitmap(mBitmap_clear, null, rect, null);
}
/**
* 开始清除按钮的显示动画
*/
private void startVisibleAnimator() {
endAnaimator();
mAnimator_visible.start();
invalidate();
}
/**
* 开始清除按钮的消失动画
*/
private void startGoneAnimator() {
endAnaimator();
mAnimator_gone.start();
invalidate();
}
/**
* 结束所有动画
*/
private void endAnaimator(){
mAnimator_gone.end();
mAnimator_visible.end();
}
/**
* Edittext内容变化的监听
* @param text
* @param start
* @param lengthBefore
* @param lengthAfter
*/
@Override
protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
super.onTextChanged(text, start, lengthBefore, lengthAfter);
if(text.length()>0) {
if (!isVisible) {
isVisible = true;
startVisibleAnimator();
}
}else{
if (isVisible) {
isVisible = false;
startGoneAnimator();
}
}
}
/**
* 触控执行的监听
* @param event
* @return
*/
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_UP) {
boolean touchable = ( getWidth() - Interval - mRight - mWidth_clear < event.getX() ) && (event.getX() < getWidth() - Interval - mRight);
if (touchable) {
setError(null);
this.setText("");
}
}
return super.onTouchEvent(event);
}
/**
* 开始晃动动画
*/
public void startShakeAnimation(){
if(getAnimation() == null){
this.setAnimation(shakeAnimation(4));
}
this.startAnimation(getAnimation());
}
/**
* 晃动动画
* @param counts 0.5秒钟晃动多少下
* @return
*/
private Animation shakeAnimation(int counts){
Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);
translateAnimation.setInterpolator(new CycleInterpolator(counts));
translateAnimation.setDuration(500);
return translateAnimation;
}
/**
* 给图标染上当前提示文本的颜色并且转出Bitmap
* @param resources
* @param context
* @return
*/
public Bitmap createBitmap(int resources,Context context) {
final Drawable drawable = ContextCompat.getDrawable(context, resources);
final Drawable wrappedDrawable = DrawableCompat.wrap(drawable);
DrawableCompat.setTint(wrappedDrawable, getCurrentHintTextColor());
return drawableToBitamp(wrappedDrawable);
}
/**
* drawable转换成bitmap
* @param drawable
* @return
*/
private Bitmap drawableToBitamp(Drawable drawable)
{
int w = drawable.getIntrinsicWidth();
int h = drawable.getIntrinsicHeight();
Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565;
Bitmap bitmap = Bitmap.createBitmap(w, h, config);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, w, h);
drawable.draw(canvas);
return bitmap;
}
public int dp2px(float dipValue) {
final float scale = getResources().getDisplayMetrics().density;
return (int) (dipValue * scale + 0.5f);
}
//----------------以下方法为方便子类继承，只使用ClearEditText就没有用处---------------------------------------------------------------------
public int getInterval() {
return Interval;
}
public int getmWidth_clear() {
return mWidth_clear;
}
public Bitmap getmBitmap_clear() {
return mBitmap_clear;
}
public void addRight(int right){
mRight += right;
}
}