圆环交替

[windows phone]代码库

public CustomView(Context context, AttributeSet attrs) {
        super(context, attrs);
        TypedArray typedArray=context.obtainStyledAttributes(attrs,R.styleable.customColor);
        /*firstColor=typedArray.getColor(R.styleable.customColor_firstColor, Color.parseColor("#00ff00"));
        secondColor=typedArray.getColor(R.styleable.customColor_secondColor,Color.parseColor("#ff0000"));
        circleWidth=(int)typedArray.getDimension(R.styleable.customColor_circleWidth,10);*/
        typedArray.recycle();
}

protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        paint.setAntiAlias(true);
        paint.setStyle(Paint.Style.STROKE);
        paint.setStrokeWidth(circleWidth);
        if(flag){
            paint.setColor(firstColor);
            canvas.drawCircle(getWidth()/2,getHeight()/2,100,paint);
            paint.setColor(secondColor);
            canvas.drawArc(new RectF(getWidth()/2-100,getHeight()/2-100,getWidth()/2+100,getHeight()/2+100),-90,progress,false,paint);
        }else{
            paint.setColor(secondColor);
            canvas.drawCircle(getWidth()/2,getHeight()/2,100,paint);
            paint.setColor(firstColor);
            canvas.drawArc(new RectF(getWidth()/2-100,getHeight()/2-100,getWidth()/2+100,getHeight()/2+100),-90,progress,false,paint);
        }

        /*if(thread==null){
            thread=new MyThread();
            thread.start();
        }*/

    }

class MyThread extends Thread{
        @Override
        public void run() {
            super.run();
            while(true){
                progress+=3;
                if(progress==360){
                    progress=0;
                    if(flag){
                        flag=false;
                    }else{
                        flag=true;
                    }
                }

                postInvalidate();
                try {
                    Thread.sleep(50);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }