SuperLoadingProgress，一款优美的加载器

SuperLoadingProgress，一款优美的加载器

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介绍：
SuperLoadingProgress，一款优美的加载器，根据进度设置加载效果

本例子主要由自定义类实现SuperLoadingProgress。

项目来源：http://www.itlanbao.com/code/100698.html

效果截图：

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代码如下：

调用类代码

mSuperLoadingProgress = (SuperLoadingProgress) findViewById(R.id.pro);
        findViewById(R.id.btn).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                new Thread(){
                    @Override
                    public void run() {
                        try {
                            mSuperLoadingProgress.setProgress(0);
                            while(mSuperLoadingProgress.getProgress()<100) {
                                Thread.sleep(10);
                                mSuperLoadingProgress.setProgress(mSuperLoadingProgress.getProgress() + 1);
                            }
                            mSuperLoadingProgress.finishFail();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                }.start();
            }
        });

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SuperLoadingProgress类主要实现代码：

package com.example.kaiyicky.myapplication;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PathMeasure;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Region;
import android.graphics.RegionIterator;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;

import com.example.kaiyicky.myapplication.R;

import java.security.KeyStore;
import java.security.PublicKey;

/**
 * @author crazychen
 * @version 1.0
 * @date 2015/12/9
 */
public class SuperLoadingProgress extends View {
    /**
     * 当前进度
     */
    private int progress = 0;
    /**
     * 最大进度
     */
    private static final int maxProgress = 100;
    /**
     * 小方块抛出动画
     */
    private ValueAnimator mRotateAnimation;
    /**
     * 小方块下落
     */
    private ValueAnimator mDownAnimation;
    /**
     * 小方块下落
     */
    private ValueAnimator mForkAnimation;
    /**
     * 打钩
     */
    private ValueAnimator mTickAnimation;
    /**
     * 绘制感叹号
     */
    private ValueAnimator mshockAnimation;
    /**
     * 绘制感叹号震动
     */
    private ValueAnimator mCommaAnimation;
    private int mWidth,mHeight;
    private RectF mRectF = new RectF();
    private Paint circlePaint = new Paint();
    private Paint smallRectPaint = new Paint();
    private Paint downRectPaint = new Paint();
    private Paint commaPaint = new Paint();
    private Paint tickPaint = new Paint();
    /**
     * 画笔宽度
     */
    private int strokeWidth = 20; 
    /**
     * 
     */
    private float radius = 0;
    //0画圆,1抛出方块,2下落变粗,挤压圆形,3,绘制三叉，圆形恢复,4,绿色勾,5,红色感叹号出现，6,红色感叹号震动
    private int status = 0;
    /**
     * 测量下落路径
     */
    private PathMeasure downPathMeasure1;
    private PathMeasure downPathMeasure2;
    /**
     * 测量分叉
     */
    private PathMeasure forkPathMeasure1;
    private PathMeasure forkPathMeasure2;
    private PathMeasure forkPathMeasure3;
    /**
     * 测量打钩
     */
    private PathMeasure tickPathMeasure;
    /**
     * 感叹号
     */
    private PathMeasure commaPathMeasure1;
    private PathMeasure commaPathMeasure2;
    /**
     * 下落百分比
     * @param context
     */
    float downPrecent = 0;
    /**
     * 分叉百分比
     * @param context
     */
    float forkPrecent = 0;
    /**
     * 打钩百分比
     * @param context
     */
    float tickPrecent = 0;
    /**
     * 感叹号百分比
     * @param context
     */
    float commaPrecent = 0;
    /**
     * 震动百分比
     * @param context
     */
    int shockPrecent = 0;
    /**
     * 是否loading成功
     */
    public boolean isSuccess = false;
    /**
     * 起始角度
     */
    private static final float startAngle = -90;
    /**
     * 扫过角度
     */
    private float curSweepAngle = 0;
    /**
     * 震动角度
     */
    private int shockDir = 20;

    public SuperLoadingProgress(Context context) {
        super(context);
        init();
    }

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

    public SuperLoadingProgress(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }
    
    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        mWidth = w;
        mHeight = h;
        radius = Math.min(getMeasuredWidth(),getMeasuredHeight())/4-strokeWidth;
        mRectF.set(new RectF(radius+strokeWidth, radius+strokeWidth, 3 * radius+strokeWidth, 3 * radius+strokeWidth));
        //初始化下落路径
        Path downPath1 = new Path();
        downPath1.moveTo(2*radius+strokeWidth,strokeWidth);
        downPath1.lineTo(2 * radius+strokeWidth, radius+strokeWidth);
        Path downPath2 = new Path();
        downPath2.moveTo(2 * radius+strokeWidth, strokeWidth);
        downPath2.lineTo(2 * radius+strokeWidth, 2 * radius+strokeWidth);
        downPathMeasure1 = new PathMeasure(downPath1,false);
        downPathMeasure2 = new PathMeasure(downPath2,false);
        //初始化分叉路径
        Path forkpath1 = new Path();
        forkpath1.moveTo(2*radius+strokeWidth,2*radius+strokeWidth);
        forkpath1.lineTo(2 * radius+strokeWidth, 3 * radius+strokeWidth);
        float sin60 = (float) Math.sin(Math.PI/3);
        float cos60 = (float) Math.cos(Math.PI / 3);
        Path forkpath2 = new Path();
        forkpath2.moveTo(2 * radius+strokeWidth, 2 * radius+strokeWidth);
        forkpath2.lineTo(2*radius-radius*sin60+strokeWidth, 2*radius+radius*cos60+strokeWidth);
        Path forkpath3 = new Path();
        forkpath3.moveTo(2 * radius+strokeWidth, 2 * radius+strokeWidth);
        forkpath3.lineTo(2 * radius + radius * sin60+strokeWidth, 2 * radius + radius * cos60+strokeWidth);
        forkPathMeasure1 = new PathMeasure(forkpath1,false);
        forkPathMeasure2 = new PathMeasure(forkpath2,false);
        forkPathMeasure3 = new PathMeasure(forkpath3,false);
        //初始化打钩路径
        Path tickPath = new Path();
        tickPath.moveTo(1.5f * radius+strokeWidth, 2 * radius+strokeWidth);
        tickPath.lineTo(1.5f * radius + 0.3f * radius+strokeWidth, 2 * radius + 0.3f * radius+strokeWidth);
        tickPath.lineTo(2*radius+0.5f * radius+strokeWidth,2*radius-0.3f * radius+strokeWidth);
        tickPathMeasure = new PathMeasure(tickPath,false);
        //感叹号路径
        Path commaPath1 = new Path();
        Path commaPath2 = new Path();
        commaPath1.moveTo(2f * radius+strokeWidth, 1.25f * radius+strokeWidth);
        commaPath1.lineTo(2f * radius+strokeWidth, 2.25f * radius+strokeWidth);
        commaPath2.moveTo(2f * radius+strokeWidth, 2.75f * radius+strokeWidth);
        commaPath2.lineTo(2f * radius+strokeWidth, 2.5f * radius+strokeWidth);
        commaPathMeasure1 = new PathMeasure(commaPath1,false);
        commaPathMeasure2 = new PathMeasure(commaPath2,false);
        super.onSizeChanged(w, h, oldw, oldh);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
        int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
        int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
        int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);
        setMeasuredDimension(widthSpecSize + 10 * strokeWidth, heightSpecSize + 10 * strokeWidth);
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
    }

    private float endAngle;
    private void init(){
        circlePaint.setAntiAlias(true);
        circlePaint.setColor(Color.argb(255, 48, 63, 159));
        circlePaint.setStrokeWidth(strokeWidth);
        circlePaint.setStyle(Paint.Style.STROKE);
        
        smallRectPaint.setAntiAlias(true);
        smallRectPaint.setColor(Color.argb(255, 48, 63, 159));
        smallRectPaint.setStrokeWidth(strokeWidth/2);
        smallRectPaint.setStyle(Paint.Style.STROKE);
        
        downRectPaint.setAntiAlias(true);
        downRectPaint.setColor(Color.argb(255, 48, 63, 159));
        downRectPaint.setStrokeWidth(strokeWidth);
        downRectPaint.setStyle(Paint.Style.FILL);

        commaPaint.setAntiAlias(true);
        commaPaint.setColor(Color.argb(255, 229, 57, 53));
        commaPaint.setStrokeWidth(strokeWidth);
        commaPaint.setStyle(Paint.Style.STROKE);
        
        tickPaint.setColor(Color.argb(255, 0, 150, 136));
        tickPaint.setAntiAlias(true);
        tickPaint.setStrokeWidth(strokeWidth);
        tickPaint.setStyle(Paint.Style.STROKE);
        
        //抛出动画
        endAngle = (float) Math.atan(4f/3);
        mRotateAnimation = ValueAnimator.ofFloat(0f, endAngle*0.9f );
        mRotateAnimation.setDuration(500);
        mRotateAnimation.setInterpolator(new AccelerateDecelerateInterpolator());
        mRotateAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                curSweepAngle = (float) animation.getAnimatedValue();
                invalidate();
            }
        });

        mRotateAnimation.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                curSweepAngle = 0;
                if (isSuccess) {
                    status = 2;
                    mDownAnimation.start();
                } else {
                    status = 5;
                    mCommaAnimation.start();
                }
            }
        });

//下落动画        
        mDownAnimation = ValueAnimator.ofFloat(0f, 1f );
        mDownAnimation.setDuration(500);
        mDownAnimation.setInterpolator(new AccelerateInterpolator());
        mDownAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                downPrecent = (float) animation.getAnimatedValue();
                invalidate();
            }
        });

        mDownAnimation.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                status = 3;
                mForkAnimation.start();
            }
        });

 //分叉动画        
        mForkAnimation = ValueAnimator.ofFloat(0f, 1f );
        mForkAnimation.setDuration(100);
        mForkAnimation.setInterpolator(new LinearInterpolator());
        mForkAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                forkPrecent = (float) animation.getAnimatedValue();
                invalidate();
            }
        });

        mForkAnimation.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationStart(Animator animation) {
                super.onAnimationStart(animation);
            }

            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                mTickAnimation.start();
            }
        });


        //打钩动画        
        mTickAnimation = ValueAnimator.ofFloat(0f, 1f);
        mTickAnimation.setStartDelay(1000);
        mTickAnimation.setDuration(500);
        mTickAnimation.setInterpolator(new AccelerateInterpolator());
        mTickAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                tickPrecent = (float) animation.getAnimatedValue();
                invalidate();
            }
        });

        mTickAnimation.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationStart(Animator animation) {
                super.onAnimationStart(animation);
                status = 4;
            }
        });
       

     //感叹号动画        
        mCommaAnimation = ValueAnimator.ofFloat(0f, 1f);
        mCommaAnimation.setDuration(300);
        mCommaAnimation.setInterpolator(new AccelerateInterpolator());
        mCommaAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {

            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                commaPrecent = (float) animation.getAnimatedValue();
                invalidate();
            }
        });

        mCommaAnimation.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                status = 6;
                mshockAnimation.start();
            }
        });

    //震动动画
        mshockAnimation = ValueAnimator.ofInt(-1, 0, 1, 0, -1, 0,1,0);
        mshockAnimation.setDuration(500);
        
        mshockAnimation.setInterpolator(new LinearInterpolator());
        mshockAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                shockPrecent = (int) animation.getAnimatedValue();
                invalidate();
            }

        });
    }

    @Override
    protected void onDraw(Canvas canvas) {
        switch (status){
            case 0:
                float precent = 1.0f*progress/maxProgress;
                canvas.drawArc(mRectF, startAngle-270*precent, -(60 + precent*300), false, circlePaint);
                break;
            case 1:
                drawSmallRectFly(canvas);
                break;
            case 2:
                drawRectDown(canvas);
                break;
            case 3:
                drawFork(canvas);
                break;
            case 4:
                drawTick(canvas);
                break;
            case 5:
                drawComma(canvas);
                break;
            case 6:
                drawShockComma(canvas);
                break;
        }
    }

  /**
     * 抛出小方块
     * @param canvas
     */
    private void drawSmallRectFly(Canvas canvas){
        canvas.save();
        canvas.translate(radius / 2 + strokeWidth, 2 * radius + strokeWidth);//将坐标移动到大圆圆心
        float bigRadius = 5*radius/2;//大圆半径
        float x1 = (float) (bigRadius*Math.cos(curSweepAngle));
        float y1 = -(float) (bigRadius*Math.sin(curSweepAngle));
        float x2 = (float) (bigRadius*Math.cos(curSweepAngle+0.05*endAngle+0.1*endAngle*(1-curSweepAngle/0.9*endAngle)));//
        float y2 = -(float) (bigRadius*Math.sin(curSweepAngle+0.05*endAngle+0.1*endAngle*(1-curSweepAngle/0.9*endAngle)));
        canvas.drawLine(x1, y1, x2, y2, smallRectPaint);
        canvas.restore();
        circlePaint.setColor(Color.argb(255, 48, 63, 159));
        canvas.drawArc(mRectF, 0, 360, false, circlePaint);
    }


    /**
     * 绘制下落过程
     * @param canvas
     */
    private void drawRectDown(Canvas canvas){
        //下落方块的起始端坐标
        float pos1[] = new float[2];
        float tan1[] = new float[2];
        downPathMeasure1.getPosTan(downPrecent * downPathMeasure1.getLength(), pos1, tan1);
        //下落方块的末端坐标
        float pos2[] = new float[2];
        float tan2[] = new float[2];
        downPathMeasure2.getPosTan(downPrecent * downPathMeasure2.getLength(), pos2, tan2);
        //椭圆形区域
        Rect mRect = new Rect(Math.round(mRectF.left),Math.round(mRectF.top+mRectF.height()*0.1f*downPrecent),
                Math.round(mRectF.right),Math.round(mRectF.bottom-mRectF.height()*0.1f*downPrecent));
        
        //非交集
        Region region1 = new Region(Math.round(pos1[0])-strokeWidth/4,Math.round(pos1[1]),Math.round(pos2[0]+strokeWidth/4),Math.round(pos2[1]));
        region1.op(mRect, Region.Op.DIFFERENCE);
        drawRegion(canvas, region1, downRectPaint);
        
        //交集
        Region region2 = new Region(Math.round(pos1[0])-strokeWidth/2,Math.round(pos1[1]),Math.round(pos2[0]+strokeWidth/2),Math.round(pos2[1]));
        boolean isINTERSECT = region2.op(mRect, Region.Op.INTERSECT);
        drawRegion(canvas, region2, downRectPaint);

        //椭圆形区域
        if(isINTERSECT) {//如果有交集
            float extrusionPrecent = (pos2[1]-radius)/radius;
            RectF rectF = new RectF(mRectF.left, mRectF.top + mRectF.height() * 0.1f * extrusionPrecent, mRectF.right, mRectF.bottom - mRectF.height() * 0.1f * extrusionPrecent);
            canvas.drawArc(rectF, 0, 360, false, circlePaint);
        }else{
            canvas.drawArc(mRectF, 0, 360, false, circlePaint);
        }
    }

    /**
     * 绘制分叉
     * @param canvas
     */
    private void drawFork(Canvas canvas) {
        float pos1[] = new float[2];
        float tan1[] = new float[2];
        forkPathMeasure1.getPosTan(forkPrecent * forkPathMeasure1.getLength(), pos1, tan1);
        float pos2[] = new float[2];
        float tan2[] = new float[2];
        forkPathMeasure2.getPosTan(forkPrecent * forkPathMeasure2.getLength(), pos2, tan2);
        float pos3[] = new float[2];
        float tan3[] = new float[2];
        forkPathMeasure3.getPosTan(forkPrecent * forkPathMeasure3.getLength(), pos3, tan3);
        
        canvas.drawLine(2 * radius+strokeWidth, radius+strokeWidth, 2 * radius+strokeWidth, 2 * radius+strokeWidth, downRectPaint);
        canvas.drawLine(2 * radius+strokeWidth, 2 * radius+strokeWidth, pos1[0], pos1[1], downRectPaint);
        canvas.drawLine(2 * radius+strokeWidth, 2 * radius+strokeWidth, pos2[0], pos2[1], downRectPaint);
        canvas.drawLine(2 * radius+strokeWidth, 2 * radius+strokeWidth, pos3[0], pos3[1], downRectPaint);
        //椭圆形区域
        RectF rectF = new RectF(mRectF.left, mRectF.top + mRectF.height() * 0.1f * (1-forkPrecent), 
                mRectF.right, mRectF.bottom - mRectF.height() * 0.1f * (1-forkPrecent));
        canvas.drawArc(rectF, 0, 360, false, circlePaint);
    }

    /**
     * 绘制打钩
     * @param canvas
     */
    private void drawTick(Canvas canvas) {
        Path path = new Path();
        /*
         * On KITKAT and earlier releases, the resulting path may not display on a hardware-accelerated Canvas. 
         * A simple workaround is to add a single operation to this path, such as dst.rLineTo(0, 0).
         */
        tickPathMeasure.getSegment(0, tickPrecent * tickPathMeasure.getLength(), path, true);
        path.rLineTo(0, 0);
        canvas.drawPath(path, tickPaint);
        canvas.drawArc(mRectF, 0, 360, false, tickPaint);
    }

    /**
     * 绘制感叹号
     */
    private void drawComma(Canvas canvas) {
        Path path1 = new Path();
        commaPathMeasure1.getSegment(0, commaPrecent * commaPathMeasure1.getLength(), path1, true);
        path1.rLineTo(0, 0);
        Path path2 = new Path();
        commaPathMeasure2.getSegment(0, commaPrecent * commaPathMeasure2.getLength(), path2, true);
        path2.rLineTo(0, 0);
        canvas.drawPath(path1, commaPaint);
        canvas.drawPath(path2, commaPaint);
        canvas.drawArc(mRectF, 0, 360, false, commaPaint);
    }

    /**
     * 绘制震动效果
     * @param canvas
     */
    private void drawShockComma(Canvas canvas) {
        Path path1 = new Path();
        commaPathMeasure1.getSegment(0, commaPathMeasure1.getLength(), path1, true);
        path1.rLineTo(0, 0);
        Path path2 = new Path();
        commaPathMeasure2.getSegment(0, commaPathMeasure2.getLength(), path2, true);
        path2.rLineTo(0, 0);
        
        if (shockPrecent!=0){
            canvas.save();
            if (shockPrecent==1)
                canvas.rotate(shockDir, 2 * radius, 2 * radius);
            else if(shockPrecent==-1)
                canvas.rotate(-shockDir, 2 * radius, 2 * radius);
        }
        canvas.drawPath(path1, commaPaint);
        canvas.drawPath(path2, commaPaint);
        canvas.drawArc(mRectF, 0, 360, false, commaPaint);
        if (shockPrecent!=0) {
            canvas.restore();
        }
    }
    
    /**
     * 绘制区域
     * @param canvas
     * @param rgn
     * @param paint
     */
    private void drawRegion(Canvas canvas,Region rgn,Paint paint) {
        RegionIterator iter = new RegionIterator(rgn);
        Rect r = new Rect();
        while (iter.next(r)) {
            canvas.drawRect(r, paint);
        }
    }

    /**
     * 开始完成动画
     */
    private void start(){
        post(new Runnable() {
            @Override
            public void run() {
                mRotateAnimation.start();
            }
        });
    }

    public void setProgress(int progress) {
        this.progress = Math.min(progress,maxProgress);
        postInvalidate();
        if (progress==0){
            status = 0;
        }
    }

    public int getProgress() {
        return progress;
    }

    /**
     * loading成功后调用
     */
    public void finishSuccess() {
        setProgress(maxProgress);
        this.isSuccess = true;
        status = 1;
        start();
    }

    /**
     * loading失败后调用
     */
    public void finishFail() {
        setProgress(maxProgress);
        this.isSuccess = false;
        status = 1;
        start();
    }
}

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SuperLoadingProgress，一款优美的加载器

原文：http://wuchengyi2015106.iteye.com/blog/2264708