Android自定义View仿微博运动积分动画效果

<&＃63;xml version="1.0" encoding="utf-8"&＃63;>

 //自定义属性名,定义公共属性
 
 
 
 
 

 //自定义控件的主题样式
 
  
  
  
  
 

/**
 * Created by tangyangkai on 16/5/23.
 */
public class MySportView extends View {


 private String text;
 private int textColor;
 private int textSize;
 private int outCircleColor;
 private int inCircleColor;
 private Paint mPaint, circlePaint;
 //绘制文本的范围
 private Rect mBound;
 private RectF circleRect;
 private float mCurrentAngle;
 private float mStartSweepValue;
 private int mCurrentPercent, mTargetPercent;

 public MySportView(Context context) {
  this(context, null);
 }

 public MySportView(Context context, AttributeSet attrs) {
  this(context, attrs, 0);
 }

 public MySportView(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);


  //获取我们自定义的样式属性
  TypedArray array = context.getTheme().obtainStyledAttributes(attrs, R.styleable.MySportView, defStyleAttr, 0);
  int n = array.getIndexCount();
  for (int i = 0; i 

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

 @Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
//如果布局里面设置的是固定值,这里取布局里面的固定值和父布局大小值中的最小值;如果设置的是match_parent,则取父布局的大小
  int widthMode = MeasureSpec.getMode(widthMeasureSpec);
  int widthSize = MeasureSpec.getSize(widthMeasureSpec);
  int heightMode = MeasureSpec.getMode(heightMeasureSpec);
  int heightSize = MeasureSpec.getSize(heightMeasureSpec);
  int width;
  int height;
  if (widthMode == MeasureSpec.EXACTLY) {
   width = widthSize;
  } else {
   mPaint.setTextSize(textSize);
   mPaint.getTextBounds(text, 0, text.length(), mBound);
   float textWidth = mBound.width();
   int desired = (int) (getPaddingLeft() + textWidth + getPaddingRight());
   width = desired;
  }

  if (heightMode == MeasureSpec.EXACTLY) {
   height = heightSize;
  } else {
   mPaint.setTextSize(textSize);
   mPaint.getTextBounds(text, 0, text.length(), mBound);
   float textHeight = mBound.height();
   int desired = (int) (getPaddingTop() + textHeight + getPaddingBottom());
   height = desired;
  }
  //调用父类方法,把View的大小告诉父布局。
  setMeasuredDimension(width, height);
 }

 @Override
 protected void onDraw(Canvas canvas) {
  //设置外圆的颜色
  mPaint.setColor(outCircleColor);
  //设置外圆为空心
  mPaint.setStyle(Paint.Style.STROKE);
  //画外圆
  canvas.drawCircle(getWidth() / 2, getWidth() / 2, getWidth() / 2, mPaint);
  //设置字体颜色
  mPaint.setColor(textColor);
  //设置字体大小
  mPaint.setTextSize(textSize);
  //得到字体的宽高范围
  text = String.valueOf(mCurrentPercent);
  mPaint.getTextBounds(text, 0, text.length(), mBound);
  //绘制字体
  canvas.drawText(text, getWidth() / 2 - mBound.width() / 2, getWidth() / 2 + mBound.height() / 2, mPaint);

  //设置字体大小
  mPaint.setTextSize(textSize / 3);
  //绘制字体
  canvas.drawText("分", getWidth() * 3 / 4, getWidth() / 3, mPaint);

  circlePaint.setAntiAlias(true);
  circlePaint.setStyle(Paint.Style.STROKE);
  //设置圆弧的宽度
  circlePaint.setStrokeWidth(10);
  //设置圆弧的颜色
  circlePaint.setColor(inCircleColor);
  //圆弧范围
  circleRect = new RectF(20, 20, getWidth() - 20, getWidth() - 20);
  //绘制圆弧
  canvas.drawArc(circleRect, mStartSweepValue, mCurrentAngle, false, circlePaint);
  //判断当前百分比是否小于设置目标的百分比
  if (mCurrentPercent