android Launcher 自定义View 高仿hola一键清理效果

package com.example.administrator.cleanviewactivity;

import android.animation.Animator;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.DecelerateInterpolator;

/**
* ferris
* 2015年10月17日 14:37:02
* TODO: 一键清理View
*/
public class CleanProgressView extends View {
private final float mStartAngle = -90;
private float mSweepAngle = 0;
private float mMaxSweepAngle = 360;
private int mAnimationDuration = 400;
private int mMaxProgress = 100;
private Paint mPaint;
private RectF outerRect;
private int outerWidth,middleWidth,progressWidth;
public CleanProgressView(Context context) {
super(context);
init(null, 0);
}

public CleanProgressView(Context context, AttributeSet attrs) {
super(context, attrs);
init(attrs, 0);
}

public CleanProgressView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(attrs, defStyle);
}

private void init(AttributeSet attrs, int defStyle) {
// Load attributes
//        final TypedArray a = getContext().obtainStyledAttributes(
//                attrs, R.styleable.CleanProgressView, defStyle, 0);
//
//        mExampleString = a.getString(
//                R.styleable.CleanProgressView_exampleString);
//        mExampleColor = a.getColor(
//                R.styleable.CleanProgressView_exampleColor,
//                mExampleColor);
//        // Use getDimensionPixelSize or getDimensionPixelOffset when dealing with
//        // values that should fall on pixel boundaries.
//        mExampleDimension = a.getDimension(
//                R.styleable.CleanProgressView_exampleDimension,
//                mExampleDimension);
//
//        if (a.hasValue(R.styleable.CleanProgressView_exampleDrawable)) {
//            mExampleDrawable = a.getDrawable(
//                    R.styleable.CleanProgressView_exampleDrawable);
//            mExampleDrawable.setCallback(this);
//        }
//
//        a.recycle();

}

private void initClean(int width,int hight){
int cleanSize = Math.min(width, hight);
outerWidth=(cleanSize-getPaddingLeft()-getPaddingRight())/3;
middleWidth=outerWidth/3*2;
progressWidth=middleWidth/2;
if(outerRect==null){
outerRect=new RectF();
}
outerRect.set(getPaddingLeft(), getPaddingTop(), cleanSize - getPaddingRight(), cleanSize - getPaddingBottom());
}

private Paint getBasePaint(){
mPaint=new Paint();
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
mPaint.setAntiAlias(true);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeCap(Paint.Cap.ROUND);
return mPaint;
}

private Paint getOuterPaint(){
if(mPaint==null){
mPaint=getBasePaint();
}
mPaint.setColor(Color.BLACK);
mPaint. setStrokeWidth(outerWidth);
mPaint.setAlpha(30);
return mPaint;
}

private Paint getMiddlePaint(){
if(mPaint==null){
mPaint=getBasePaint();
}
mPaint.setColor(Color.BLACK);
mPaint. setStrokeWidth(middleWidth);
mPaint.setAlpha(100);
return mPaint;
}
private Paint getProgressPaint(){
if(mPaint==null){
mPaint=getBasePaint();
}
mPaint.setColor(Color.GREEN);
mPaint. setStrokeWidth(progressWidth);
mPaint.setAlpha(200);
return mPaint;
}

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawArc(outerRect, 0, 360, false, getOuterPaint());
canvas.drawArc(outerRect, 0, 360, false, getMiddlePaint());
canvas.drawArc(outerRect, mStartAngle, mSweepAngle, false, getProgressPaint());
}
private float calcSweepAngleFromProgress(int progress) {
return (mMaxSweepAngle / mMaxProgress) * progress;
}
private int calcProgressFromSweepAngle(float sweepAngle) {
return (int) ((sweepAngle * mMaxProgress) / mMaxSweepAngle);
}

//直接设置进度信息
public void setFastProgress(int progress) {
mSweepAngle = calcSweepAngleFromProgress(progress);
invalidate();
}

public void setProgress(int progress) {
ValueAnimator animator = ValueAnimator.ofFloat(mSweepAngle,
calcSweepAngleFromProgress(progress));
animator.setInterpolator(new DecelerateInterpolator());
animator.setDuration(mAnimationDuration);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
mSweepAngle = (Float) valueAnimator.getAnimatedValue();
invalidate();
}
});
animator.addListener(new Animator.AnimatorListener() {

@Override
public void onAnimationStart(Animator animation) {
// TODO Auto-generated method stub

}

@Override
public void onAnimationRepeat(Animator animation) {
// TODO Auto-generated method stub

}

@Override
public void onAnimationEnd(Animator animation) {
// TODO Auto-generated method stub

}

@Override
public void onAnimationCancel(Animator animation) {
// TODO Auto-generated method stub

}
});
animator.start();
}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
initClean(w,h);
}
}