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Android自定义View实现点赞控件

分类：Android作者：编程之家

本文实例为大家分享了Android点赞控件的具体代码，供大家参考，具体内容如下

预览效果

Android自定义View实现点赞控件


目录

图片类：LikeImageView
文字类：LikeCharTextView
整合类：LikeView.java
自定义属性：attrs.xml

代码

LikeCharTextView

public class LikeCharTextView extends View {

 public static final int DEFAULT_TEXTCOLOR = Color.BLACK;
 public static final int DEFAULT_TEXTSIZE = 36;

 private TextPaint newTextPaint,oldTextPaint;

 private AnimatorSet addAnimator;
 private AnimatorSet minusAnimator;

 private int  measureWidth;
 private int  measureHeight;

 private int  textColor  = DEFAULT_TEXTCOLOR;
 private int  textSize  = DEFAULT_TEXTSIZE;

 private int  num;
 private int  oldNum;
 private int  newNum;

 private int  animatorOldY;
 private float  animatorOldAlpha = 1;

 private int  animatorNewY;
 private float  animatorNewAlpha = 0;
 private int  baseline;

 public LikeCharTextView(Context context) {
 super(context);

 init();
 }

 public LikeCharTextView(Context context,@Nullable AttributeSet attrs) {
 super(context,attrs);

 initAttr(context,attrs);

 init();
 }

 public LikeCharTextView(Context context,@Nullable AttributeSet attrs,int defStyleAttr) {
 super(context,attrs,defStyleAttr);

 initAttr(context,attrs);

 init();
 }

 /**
 * 初始化属性
 *
 * @param context
 * @param attrs
 */
 private void initAttr(Context context,@Nullable AttributeSet attrs) {
 TypedArray typedArray = context.obtainStyledAttributes(attrs,R.styleable.LikeCharTextView);
 textColor = typedArray.getColor(R.styleable.LikeCharTextView_textColor,DEFAULT_TEXTCOLOR);
 textSize = typedArray.getDimensionPixelSize(R.styleable.LikeCharTextView_textSize,DEFAULT_TEXTSIZE);
 num = typedArray.getInt(R.styleable.LikeCharTextView_number,0);
 if (0 > num || num > 10) {
  throw new IllegalArgumentException("Number is only 0-9");
 }
 oldNum = num;

 typedArray.recycle();
 }

 /**
 * 初始化
 */
 private void init() {
 initPaints();
 initParams();
 }

 /**
 * 初始化画笔
 */
 private void initPaints() {
 newTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
 newTextPaint.setStyle(Paint.Style.FILL);
 newTextPaint.setTextSize(textSize);
 newTextPaint.setColor(textColor);
 newTextPaint.setTextAlign(Paint.Align.CENTER);

 oldTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
 oldTextPaint.set(newTextPaint);
 }

 /**
 * 初始化参数
 */
 private void initParams() {
 Paint.FontMetrics fontMetrics = newTextPaint.getFontMetrics();
 measureWidth = (int) newTextPaint.measureText(String.valueOf(num));
 measureHeight = (int) (fontMetrics.bottom - fontMetrics.top);

 float distance = (fontMetrics.bottom - fontMetrics.top) / 2 - fontMetrics.bottom;
 baseline = (int) (measureHeight * 1.0f / 2 + distance);

 animatorOldY = baseline;
 }

 @Override
 protected void onMeasure(int widthMeasureSpec,int heightMeasureSpec) {
 super.onMeasure(widthMeasureSpec,heightMeasureSpec);

 int widthMode = MeasureSpec.getMode(widthMeasureSpec);
 int widthSize = MeasureSpec.getSize(widthMeasureSpec);
 switch (widthMode) {
  case MeasureSpec.UNSPECIFIED:
  break;
  case MeasureSpec.AT_MOST:
  widthSize = measureWidth;
  break;
  case MeasureSpec.EXACTLY:
  break;
 }

 int heightMode = MeasureSpec.getMode(widthMeasureSpec);
 int heightSize = MeasureSpec.getSize(widthMeasureSpec);
 switch (heightMode) {
  case MeasureSpec.UNSPECIFIED:
  break;
  case MeasureSpec.AT_MOST:
  heightSize = measureHeight;
  break;
  case MeasureSpec.EXACTLY:
  break;
 }

 setMeasuredDimension(widthSize,heightSize);
 }

 @Override
 protected void onDraw(Canvas canvas) {
 super.onDraw(canvas);
 int width = getWidth();
 int height = getHeight();
 oldTextPaint.setAlpha((int) (255 * animatorOldAlpha));
 canvas.drawText(String.valueOf(oldNum),width / 2,animatorOldY,oldTextPaint);

 newTextPaint.setAlpha((int) (255 * animatorNewAlpha));
 canvas.drawText(String.valueOf(newNum),animatorNewY,newTextPaint);
 }

 public void setTextColor(int textColor) {
 this.textColor = textColor;
 init();
 invalidate();
 }

 public void setTextSize(int textSize) {
 this.textSize = textSize;
 init();
 invalidate();
 }

 public void setAnimatorOldY(int animatorOldY) {
 this.animatorOldY = animatorOldY;
 invalidate();
 }

 public void setAnimatorOldAlpha(float animatorOldAlpha) {
 this.animatorOldAlpha = animatorOldAlpha;
 invalidate();
 }

 public void setAnimatorNewY(int animatorNewY) {
 this.animatorNewY = animatorNewY;
 invalidate();
 }

 public void setAnimatorNewAlpha(float animatorNewAlpha) {
 this.animatorNewAlpha = animatorNewAlpha;
 invalidate();
 }

 public void setNum(int num) {
 this.num = num;
 if (0 > num || num > 10) {
  throw new IllegalArgumentException("Number is only 0-9");
 }
 oldNum = num;
 invalidate();
 }

 public void add() {
 Logger.e("执行加动画.基线：" + baseline);
 ObjectAnimator oldYAnimator = ObjectAnimator.ofInt(this,"animatorOldY",baseline,0);
 ObjectAnimator oldAlphaAnimator = ObjectAnimator.ofFloat(this,"animatorOldAlpha",1,0);
 ObjectAnimator newYAnimator = ObjectAnimator.ofInt(this,"animatorNewY",baseline * 2,baseline);
 ObjectAnimator newAlphaAnimator = ObjectAnimator.ofFloat(this,"animatorNewAlpha",1);

 addAnimator = new AnimatorSet();
 addAnimator.playTogether(oldYAnimator,oldAlphaAnimator,newYAnimator,newAlphaAnimator);
 addAnimator.setInterpolator(new LinearInterpolator());
 addAnimator.setDuration(300);
 addAnimator.start();
 }

 public void minus() {
 Logger.e("执行减动画.基线:" + baseline);
 ObjectAnimator oldYAnimator = ObjectAnimator.ofInt(this,baseline * 2);
 ObjectAnimator oldAlphaAnimator = ObjectAnimator.ofFloat(this,1);

 minusAnimator = new AnimatorSet();
 minusAnimator.playTogether(oldYAnimator,newAlphaAnimator);
 minusAnimator.setInterpolator(new LinearInterpolator());
 minusAnimator.setDuration(300);
 minusAnimator.start();
 }

 public void change(boolean isAdd) {
 Logger.e("charTextVie.点击事件:" + isAdd);
 if (isAdd) {
  if (null != addAnimator && addAnimator.isstarted()) {
  Logger.e("charTextVie.加动画已执行.取消");
  addAnimator.cancel();
  }
  if (null != minusAnimator && minusAnimator.isstarted()) {
  Logger.e("charTextVie.减动画已执行.取消");
  minusAnimator.cancel();
  }
  sumNum(false);
  minus();
 } else {
  if (null != minusAnimator && minusAnimator.isstarted()) {
  Logger.e("charTextVie.减动画已执行.取消");
  minusAnimator.cancel();
  }
  if (null != addAnimator && addAnimator.isstarted()) {
  Logger.e("charTextVie.加动画已执行.取消");
  addAnimator.cancel();
  }
  sumNum(true);
  add();
 }
 }

 /**
 * 重新计算绘画的值
 *
 * @param isAdd
 */
 private void sumNum(boolean isAdd) {
 Logger.e("计算值开始");
 oldNum = num;
 newNum = num + (isAdd ? 1 : -1);
 if (newNum < 0) {
  newNum = 9;
 } else if (newNum > 9) {
  newNum = 0;
 }
 num = newNum;
 Logger.e("计算值结束：" + num);
 }
}

LikeImageView

public class LikeImageView extends View {

 private Paint imagePaint,shiningPaint;

 private int shiningMoveX;
 private int shiningMoveY;

 private int measureWidth;
 private int measureHeight;
 private Bitmap selectedBtimap;
 private Bitmap selectedShiningBtimap;
 private Bitmap unSelectedBtimap;

 private boolean isAdd = false;

 private float shiningalpha = isAdd ? 1f : 0f;

 public LikeImageView(Context context) {
 super(context);

 init();
 }

 public LikeImageView(Context context,attrs);

 init();
 }

 public LikeImageView(Context context,defStyleAttr);

 init();
 }

 private void init() {
 imagePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
 shiningPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

 selectedBtimap = BitmapFactory.decodeResource(getResources(),R.mipmap.ic_like_selected);
 selectedShiningBtimap = BitmapFactory.decodeResource(getResources(),R.mipmap.ic_like_selected_shining);
 unSelectedBtimap = BitmapFactory.decodeResource(getResources(),R.mipmap.ic_like_unselected);
 }

 @Override
 protected void onMeasure(int widthMeasureSpec,heightMeasureSpec);

 int widthMode = MeasureSpec.getMode(widthMeasureSpec);
 int widthSize = MeasureSpec.getSize(widthMeasureSpec);
 switch (widthMode) {
  case MeasureSpec.UNSPECIFIED:
  break;
  case MeasureSpec.AT_MOST:
  widthSize = Math.max(selectedBtimap.getWidth(),unSelectedBtimap.getWidth());
  shiningMoveX = (int) (widthSize * 1.0f - selectedShiningBtimap.getWidth()) - 2;
  break;
  case MeasureSpec.EXACTLY:
  break;
 }

 int heightMode = MeasureSpec.getMode(widthMeasureSpec);
 int heightSize = MeasureSpec.getSize(widthMeasureSpec);
 switch (heightMode) {
  case MeasureSpec.UNSPECIFIED:
  break;
  case MeasureSpec.AT_MOST:
  heightSize = Math.max(selectedBtimap.getHeight(),unSelectedBtimap.getHeight());
  shiningMoveY = (int) (selectedShiningBtimap.getHeight() * 1.0f / 3);
  heightSize += shiningMoveY;
  break;
  case MeasureSpec.EXACTLY:
  break;
 }

 setMeasuredDimension(widthSize,heightSize);
 }

 @Override
 protected void onDraw(Canvas canvas) {
 super.onDraw(canvas);

 int width = getWidth();
 int height = getHeight();
 Rect src = new Rect(0,width,height);
 Rect selectDst = new Rect(0,shiningMoveY,selectedBtimap.getWidth(),height);
 if (isAdd) {
  //画红赞
  canvas.drawBitmap(selectedBtimap,src,selectDst,imagePaint);
  //画阴影
  shiningPaint.setAlpha((int) (255 * shiningalpha));
  Rect shiningDst = new Rect(shiningMoveX,shiningMoveX + selectedShiningBtimap.getWidth(),selectedShiningBtimap.getHeight());
  canvas.drawBitmap(selectedShiningBtimap,shiningDst,shiningPaint);
 } else {
  //画灰赞
  canvas.drawBitmap(unSelectedBtimap,imagePaint);
 }
 }

 public void setShiningalpha(float shiningalpha) {
 this.shiningalpha = shiningalpha;
 invalidate();
 }

 public void setAdd(boolean add) {
 isAdd = add;
 shiningalpha = 1.0f;
 invalidate();
 }

 public void changeLike(boolean isAdd) {
 this.isAdd = !isAdd;
 invalidate();
 anim();
 }

 private void anim() {
 ObjectAnimator scaleXAnim = ObjectAnimator.ofFloat(this,"scaleX",0.7f,1f);
 scaleXAnim.setDuration(500);
 ObjectAnimator scaleYAnim = ObjectAnimator.ofFloat(this,"scaleY",1f);
 scaleYAnim.setDuration(500);
 ObjectAnimator alphaAnim = ObjectAnimator.ofFloat(this,"shiningalpha",0f,1f);
 alphaAnim.setDuration(500);
 AnimatorSet animatorSet = new AnimatorSet();
 animatorSet.playTogether(scaleXAnim,scaleYAnim,alphaAnim);
 animatorSet.setInterpolator(new BounceInterpolator());
 animatorSet.start();
 }
}

LikeView

public class LikeView extends LinearLayout {
 private final int IMAGEPADDING = 4;

 private boolean isAdd = false;

 private int num;
 private int textSize;
 private int textColor;

 private int imagePadding;

 private List<LikeCharTextView> charTvs = new ArrayList<>();
 private LikeImageView likeImageView;

 public LikeView(Context context) {
 super(context);
 init();
 }

 public LikeView(Context context,attrs);

 init();
 }

 public LikeView(Context context,attrs);

 init();
 }

 private void initAttr(Context context,AttributeSet attrs) {
 TypedArray typedArray = context.obtainStyledAttributes(attrs,R.styleable.LikeView);
 textColor = typedArray.getColor(R.styleable.LikeView_textColor,LikeCharTextView.DEFAULT_TEXTCOLOR);
 textSize = typedArray.getDimensionPixelSize(R.styleable.LikeView_textSize,LikeCharTextView.DEFAULT_TEXTSIZE);
 num = typedArray.getInt(R.styleable.LikeView_number,0);
 imagePadding = typedArray.getDimensionPixelSize(R.styleable.LikeView_imagePadding,IMAGEPADDING);

 typedArray.recycle();
 }

 /**
 * 初始化
 */
 private void init() {

 initView();
 }

 protected void initView() {
 removeAllViews();

 likeImageView = new LikeImageView(getContext());
 likeImageView.setAdd(isAdd);
 LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT);
 layoutParams.rightMargin = imagePadding;
 likeImageView.setLayoutParams(layoutParams);
 addView(likeImageView);

 charTvs.clear();
 String str_num = String.valueOf(num);
 for (int i = 0; i < str_num.length(); i++) {
  LikeCharTextView textView = new LikeCharTextView(getContext());
  int show_num = Integer.valueOf(str_num.substring(i,i + 1));
  Log.e("zanview","show_num:" + show_num);
  textView.setTextSize(textSize);
  textView.setTextColor(textColor);
  textView.setNum(show_num);
  addView(textView);
  charTvs.add(textView);
 }
 }

 public void setNum(int num) {
 this.num = num;
 init();
 invalidate();
 }

 public void setAdd(boolean add) {
 isAdd = add;
 }

 @Override
 protected void onMeasure(int widthMeasureSpec,heightMeasureSpec);
 //计算出所有的childView的宽高
 measureChildren(widthMeasureSpec,heightMeasureSpec);
 setMeasuredDimension(measureWidth(widthMeasureSpec),measureHeight(heightMeasureSpec));
 }

 /**
 * 测量宽度
 *
 * @param widthMeasureSpec
 * @return
 */
 private int measureWidth(int widthMeasureSpec) {
 int widthMode = MeasureSpec.getMode(widthMeasureSpec);
 int widthSize = MeasureSpec.getSize(widthMeasureSpec);
 switch (widthMode) {
  case MeasureSpec.UNSPECIFIED:
  break;
  case MeasureSpec.AT_MOST:
  widthSize = 0;
  for (int i = 0; i < getChildCount(); i++) {
   View childView = getChildAt(i);
   //获取子view的宽
   int cWidth = childView.getMeasuredWidth();
   MarginLayoutParams params = (MarginLayoutParams) childView.getLayoutParams();
   widthSize += cWidth + params.leftMargin + params.rightMargin;
  }
  break;
  case MeasureSpec.EXACTLY:
  break;
 }
 return widthSize;
 }

 /**
 * 测量高度
 *
 * @param widthMeasureSpec
 * @return
 */
 private int measureHeight(int widthMeasureSpec) {
 int heightMode = MeasureSpec.getMode(widthMeasureSpec);
 int heightSize = MeasureSpec.getSize(widthMeasureSpec);
 switch (heightMode) {
  case MeasureSpec.UNSPECIFIED:
  break;
  case MeasureSpec.AT_MOST:
  heightSize = 0;
  for (int i = 0; i < getChildCount(); i++) {
   View childView = getChildAt(i);
   //获取子view的宽
   int cWidth = childView.getMeasuredHeight();
   MarginLayoutParams params = (MarginLayoutParams) childView.getLayoutParams();
   int height = cWidth + params.leftMargin + params.rightMargin;
   heightSize = Math.max(heightSize,height);
  }
  break;
  case MeasureSpec.EXACTLY:
  break;
 }
 return heightSize;
 }

 private boolean click = false;

 private final int MOHUFANWEI = 10;

 private float lastX = 0;
 private float lastY = 0;

 @Override
 public boolean onTouchEvent(MotionEvent event) {
 super.onTouchEvent(event);
 float x = event.getX();
 float y = event.getY();

 switch (event.getAction()) {
  case MotionEvent.ACTION_DOWN:
  if (1 == event.getPointerCount()) {
   click = true;
  }
  break;
  case MotionEvent.ACTION_UP:
  if (click) {
   onClick();
  }
  break;
  case MotionEvent.ACTION_MOVE:
  if (Math.abs(lastX - x) > MOHUFANWEI || Math.abs(lastY - y) > MOHUFANWEI) {
   click = false;
  }
  break;
 }

 lastX = x;
 lastY = y;
 return true;
 }

 private void onClick() {
 Logger.e("点击事件" + isAdd);
 String str_num = String.valueOf(num);
 Logger.e("点击事件,str_num:" + str_num);
 boolean nextAnim = false;
 if (isAdd) {
  likeImageView.changeLike(true);
  for (int i = (str_num.length() - 1); i >= 0; i--) {
  int chr_num = Integer.valueOf(str_num.substring(i,i + 1));
  Logger.e("点击事件,chr_num:%d,charTvs.size:%d,i:%d",chr_num,charTvs.size(),i);
  Logger.e("是否执行动画:" + (charTvs.size() > i));
  if (charTvs.size() > i) {
   if (i == (str_num.length() - 1) || nextAnim) {
   Logger.e("点击事件,执行个位动画||%b执行执行上%d位动画",nextAnim,i);
   charTvs.get(i).change(true);

   chr_num--;
   Logger.e("chr_num:%d，是否执行上一位动画:",(chr_num < 0));
   if (chr_num < 0) {
    nextAnim = true;
   } else {
    nextAnim = false;
   }

   Logger.e("nextAnim:" + nextAnim);
   }
  }
  }
  num--;
  isAdd = !isAdd;
 } else {
  likeImageView.changeLike(false);
  for (int i = (str_num.length() - 1); i >= 0; i--) {
  int chr_num = Integer.valueOf(str_num.substring(i,i);
   charTvs.get(i).change(false);

   chr_num++;
   Logger.e("chr_num:%d，是否执行上一位动画:",(chr_num > 9));
   if (chr_num > 9) {
    nextAnim = true;
   } else {
    nextAnim = false;
   }
   Logger.e("nextAnim:" + nextAnim);
   }
  }
  }
  num++;
  isAdd = !isAdd;
 }
 }
}

attrs.xml

<attr name="textSize" format="dimension" />
 <attr name="textColor" format="color" />
 <attr name="number" format="integer" />

 <attr name="imageWidth" format="dimension" />
 <attr name="imageHeight" format="dimension" />

 <declare-styleable name="LikeView">
 <attr name="textSize" />
 <attr name="textColor" />
 <attr name="number" />
 <attr name="imageWithd" />
 <attr name="imageHeight" />
 <attr name="imagePadding" format="dimension" />
 </declare-styleable>

 <declare-styleable name="LikeCharTextView">
 <attr name="textSize" />
 <attr name="textColor" />
 <attr name="number" />
 </declare-styleable>

 <declare-styleable name="LikeImageView">
 <attr name="imageWithd" />
 <attr name="imageHeight" />
</declare-styleable>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。

原文地址：https://www.jb51.cc/android/534597.html

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