Android:自定义view实现动画

在做android APP开发时，我们需要自定义View和自定义动画，例如：
实现过程为
代码：
package com.example.administrator.view;import android.content.Context;import android.graphics.Canvas;import android.graphics.Paint;import android.util.AttributeSet;import android.util.Log;import android.view.View;import android.view.animation.Animation;import android.view.animation.LinearInterpolator;import android.view.animation.Transformation;/** * Created by HBL on 2016/2/1. */public class AmountView extends View {    Paint paint;    int count = 120; //总刻度数    int tempcount = 0;    private BarAnimation anim;    public AmountView(Context context, AttributeSet attrs) {        super(context, attrs);        paint = new Paint();        paint.setColor(0xff388e3c);        paint.setStrokeJoin(Paint.Join.ROUND);        paint.setStrokeCap(Paint.Cap.ROUND);        paint.setStrokeWidth(3);        paint.setAntiAlias(true);        paint.setStyle(Paint.Style.STROKE);        anim = new BarAnimation();    }    public AmountView(Context context) {        super(context);    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        canvas.translate(canvas.getWidth() / 2, canvas.getHeight() / 2);        Paint tmpPaint = new Paint(paint); //小刻度画笔        tmpPaint.setStrokeWidth(2);        float y = 180;        for (int i = 0; i < tempcount; i++) {            canvas.drawLine(0f, y, 0f, y + 45f, tmpPaint);            canvas.rotate(360 / count, 0f, 0f); //旋转画纸            Log.d("AmountView", "canvas.restore();" + i);        }    }    public void startAnim() {        this.startAnimation(anim);    }    public class BarAnimation extends Animation {        @Override        protected void applyTransformation(float interpolatedTime, Transformation t) {            super.applyTransformation(interpolatedTime, t);            if (interpolatedTime < 1.0f) {                tempcount = (int) (count * interpolatedTime);                postInvalidate();                Log.d("AmountView", "tempcount:" + tempcount);            } else {                tempcount=count;            }        }        @Override        public void initialize(int width, int height, int parentWidth, int parentHeight) {            super.initialize(width, height, parentWidth, parentHeight);            setDuration(700);            //设置动画结束后保留效果            setFillAfter(true);            tempcount = 0;            setInterpolator(new LinearInterpolator());        }    }}
http://wang-peng1.iteye.com/blog/572886
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