android 抽奖盘动画

public class LotterPlate extends View {    private Context context;    private Paint dPaint = new Paint();    private Paint sPaint = new Paint(Paint.ANTI_ALIAS_FLAG);    private Paint textPaint = new Paint(Paint.ANTI_ALIAS_FLAG);    private int[] images = new int[]{R.mipmap.huawei,R.mipmap.image_one,R.mipmap.iphone,R.mipmap.macbook,R.mipmap.meizu,R.mipmap.xiaomi};    private String[] strs = {"0","1","2","3","4","5"};    private List<Bitmap> bitmaps = new ArrayList<>();    private ScrollerCompat scroller;    private  ValueAnimator unfromanimtor;    private int InitAngle = -150;    private int radius = 0;    private int number=images.length;    private  int flag=360/number;    private  int DesRotate;    public LotterPlate(Context context) {        this(context,null);    }    public LotterPlate(Context context, AttributeSet attrs) {        this(context, attrs,0);    }    public LotterPlate(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        this.context = context;        scroller = ScrollerCompat.create(context);        dPaint.setColor(Color.rgb(255,133,132));        dPaint.setStrokeWidth(74);        dPaint.setAntiAlias(true);        dPaint.setStyle(Paint.Style.STROKE);        sPaint.setColor(Color.BLACK);        textPaint.setColor(Color.WHITE);        textPaint.setTextSize(Util.dip2px(context,16));        for(int i=0;i<number;i++){            Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), images[i]);            bitmaps.add(bitmap);        }    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        // TODO Auto-generated method stub        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        //wrap_content value        int mHeight = Util.dip2px(context, 450);        int mWidth = Util.dip2px(context, 450);        int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);        int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);        int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);        int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);        if(widthSpecMode == MeasureSpec.AT_MOST && heightSpecMode == MeasureSpec.AT_MOST){            setMeasuredDimension(mWidth, mHeight);        }else if(widthSpecMode == MeasureSpec.AT_MOST){            setMeasuredDimension(mWidth, heightSpecSize);        }else if(heightSpecMode == MeasureSpec.AT_MOST){            setMeasuredDimension(widthSpecSize, mHeight);        }    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);            final int paddingLeft = getPaddingLeft();            final int paddingRight = getPaddingRight();            final int paddingTop = getPaddingTop();            final int paddingBottom = getPaddingBottom();            int width = getWidth() - paddingLeft - paddingRight;            int height = getHeight() - paddingTop - paddingBottom;            int MinValue = Math.min(width,height);            radius = MinValue/2;            RectF rectF = new RectF(getPaddingLeft()+250,getPaddingTop()+250,width-250,height-250);  //调整圆的半径            for(int i= 0;i<number;i++){                drawIcon(width/2, height/2, radius+100, InitAngle, i, canvas);                canvas.drawArc(rectF,InitAngle-flag/2,1f,false,dPaint);                drawText(InitAngle+flag/2,strs[i], radius, textPaint, canvas,rectF);                InitAngle += flag;        }    }    private void drawText(float startAngle, String string,int mRadius,Paint mTextPaint,Canvas mCanvas,RectF mRange)    {        Path path = new Path();        path.addArc(mRange, startAngle, flag);        float textWidth = mTextPaint.measureText(string);        float hOffset = (float) (mRadius * Math.PI / 7 / 2 - textWidth / 2);        float vOffset = mRadius / 2/4 ;        mCanvas.drawTextOnPath(string, path, hOffset, vOffset, mTextPaint);    }    private void drawIcon(int xx,int yy,int mRadius,float startAngle, int i,Canvas mCanvas)    {        int imgWidth = mRadius / 4;        float angle = (float) Math.toRadians(flag+startAngle);        float x = (float) (xx + mRadius/3*2   * Math.cos(angle));        float y = (float) (yy + mRadius/3*2   * Math.sin(angle));        // 确定绘制图片的位置        RectF rect = new RectF(x - imgWidth *3/ 4, y - imgWidth*3 / 4, x + imgWidth                *3/ 4, y + imgWidth*3/4);        Bitmap bitmap = bitmaps.get(i);        mCanvas.drawBitmap(bitmap, null, rect, null);    }    public void setImages(List<Bitmap> bitmaps){        this.bitmaps = bitmaps;        this.invalidate();    }    public void setStr(String... strs){        this.strs = strs;        this.invalidate();    }    //旋转一圈所需要的时间    private static final long ONE_WHEEL_TIME = 1000;    /**     * 开始转动     * @param pos 如果 pos = -1 则随机，如果指定某个值，则转到某个指定区域     */    public void startRotate(int pos){        int lap = (int) (Math.random()*12);        int angle = 0;        if(pos < 0){            angle = (int) (Math.random() * 360);        }else{            int initPos  = queryPosition();            if(pos > initPos){                angle = (pos - initPos)*60;                lap -= 1;                angle = 360 - angle;            }else if(pos < initPos){                angle = (initPos - pos)*60;            }else{                //nothing to do.            }        }        int increaseDegree = lap * 360 + angle;        long time = (lap + angle / 360) * ONE_WHEEL_TIME;         DesRotate = increaseDegree + InitAngle;        int offRotate = DesRotate % 360 % flag;        DesRotate -= offRotate;        DesRotate += 30;//        ferrisWheel(time,InitAngle,DesRotate);        turntable(time,InitAngle,DesRotate);//        unfromanimtor.cancel();    }    public void unifromAnim(){  //匀速旋转        clearAnimation();         unfromanimtor = ValueAnimator.ofInt(0,360);        unfromanimtor.setInterpolator(new LinearInterpolator());        unfromanimtor.setDuration(2000);        unfromanimtor.setRepeatCount(-1);        unfromanimtor.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {            @Override            public void onAnimationUpdate(ValueAnimator animation) {                int updateValue = (int) animation.getAnimatedValue();                InitAngle = (updateValue % 360 + 360) % 360;                ViewCompat.postInvalidateOnAnimation(LotterPlate.this);            }        });        unfromanimtor.start();    }    private void ferrisWheel( long time,int starAngle,int endAngle){ // TODO: 2017/7/6 图片会随位置改变而调整角度        ValueAnimator  valueAnimator = ValueAnimator.ofInt(starAngle,endAngle);        valueAnimator.setInterpolator(new AccelerateDecelerateInterpolator());        valueAnimator.setDuration(time);        valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {            @Override            public void onAnimationUpdate(ValueAnimator animation) {                int updateValue = (int) animation.getAnimatedValue();                InitAngle = (updateValue % 360 + 360) % 360;                ViewCompat.postInvalidateOnAnimation(LotterPlate.this);            }        });        valueAnimator.addListener(new AnimatorListenerAdapter() {            @Override            public void onAnimationEnd(Animator animation) {                super.onAnimationEnd(animation);                if(valueAnimatorListenter != null)                    valueAnimatorListenter.endAnimation(queryPosition());            }        });        valueAnimator.start();        clearAnimation();    }    private void turntable(long time,int startAngle,int endAngle){ // TODO: 2017/7/6 图片自身不会变动        RotateAnimation rotate  = new RotateAnimation(startAngle, endAngle, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);        rotate.setInterpolator(new LinearInterpolator());        rotate.setDuration(time);//设置动画持续时间        rotate.setRepeatCount(0);//设置重复次数        rotate.setFillAfter(true);//动画执行完后是否停留在执行完的状态        startAnimation(rotate);        rotate.setAnimationListener(new Animation.AnimationListener() {            @Override            public void onAnimationStart(Animation animation) {}            @Override            public void onAnimationEnd(Animation animation) {                if(valueAnimatorListenter != null) {                    InitAngle=DesRotate;                    int index=queryPosition();                    valueAnimatorListenter.endAnimation(index);                    for(int i=0;i<index;i++){                        bitmaps.add(bitmaps.size(),bitmaps.get(i));                        bitmaps.remove(i);                    }                }            }            @Override            public void onAnimationRepeat(Animation animation) {}        });    }    //查寻初始位置  可根据需求调整    private int queryPosition(){        InitAngle = (InitAngle % 360 + 360) % 360;        int pos = InitAngle / flag;        return calcumAngle(pos);    }    private int calcumAngle(int pos){        if(pos >= 0 && pos <= 3){            pos = 3 - pos;        }else{            pos = (6-pos) + 3;        }        return pos;    }    public interface AnimationEndListener{        void endAnimation(int position);    }    private AnimationEndListener valueAnimatorListenter;    public void setAnimationEndListener(AnimationEndListener valueAnimatorListenter){        this.valueAnimatorListenter = valueAnimatorListenter;    }    @Override    protected void onDetachedFromWindow() {        super.onDetachedFromWindow();        clearAnimation();    }    public static int dip2px(Context context, float dpValue) {        final float scale = context.getResources().getDisplayMetrics().density;        return (int) (dpValue * scale + 0.5f);    }}