Android自定义WaveProgressView实现水波纹加载需求

<cn.fanrunqi.waveprogressview.WaveProgressView
 android:id="@+id/waveProgressbar"
 android:background="@drawable/circle"
 <!--android:background="@drawable/bg_a"-->
 android:layout_width="130dp"
 android:layout_height="130dp" />

<?xml version="1.0" encoding="utf-8"?>
<shape
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:shape="oval">
 <solid android:color="#DDDDDD"/>
 <size android:width="150dp"
 android:height="150dp"/>
</shape>

//设置当前进度值和当前显示的文字
waveProgressbar.setCurrent(int currentProgress,String currentText); // 77, "788M/1024M"
//设置进度条的最大值
waveProgressbar.setMaxProgress(int maxProgress);
//设置显示文字的大小和颜色
waveProgressbar.setText(String mTextColor,int mTextSize);//"#FFFF00", 41
//设置水波的颜色
waveProgressbar.setWaveColor(String mWaveColor); //"#5b9ef4"
//设置波浪的高度和波浪的宽度（均为一个波峰的大小）
waveProgressbar.setWave(float mWaveHight,float mWaveWidth);
//设置波浪的上下震动的速度（这里注意值越大，震动的越小）
waveProgressbar.setmWaveSpeed(int mWaveSpeed);//The larger the value, the slower the vibration

private void Init() {
 /**
 * 获得背景
 */
 if(null==getBackground()){
 throw new IllegalArgumentException(String.format("background is null."));
 }else{
 backgroundBitmap = getBitmapFromDrawable(getBackground());
 }
 /**
 * 波浪画笔
 */
 mPath = new Path();
 mPathPaint = new Paint();
 mPathPaint.setAntiAlias(true);
 mPathPaint.setStyle(Paint.Style.FILL);
 /**
 * 进度画笔
 */
 mTextPaint = new Paint();
 mTextPaint.setAntiAlias(true);
 mTextPaint.setTextAlign(Paint.Align.CENTER);
　　　　　//开始不断自我绘制，让波浪动起来
 handler.sendEmptyMessageDelayed(INVALIDATE,100);
 }

 Paint paint = new Paint();
 paint.setAntiAlias(true);
 Bitmap finalBmp = Bitmap.createBitmap(width,height, Bitmap.Config.ARGB_8888);
 /**
 * 产生一个同样大小的画布
 */
 Canvas canvas = new Canvas(finalBmp);
 /**
 * 绘制波浪
 */
 float CurMidY = height*(maxProgress-currentProgress)/maxProgress;
 if(CurY>CurMidY){
 CurY = CurY - (CurY-CurMidY)/10;
 }
 mPath.reset();
 mPath.moveTo(0-distance,CurY);

 int waveNum = width/((int)mWaveHalfWidth*4)+1;
 int multiplier = 0;
 for(int i =0;i<waveNum;i++){
 mPath.quadTo(mWaveHalfWidth*(multiplier+1)-distance,CurY-mWaveHight,mWaveHalfWidth*(multiplier+2)-distance,CurY);
 mPath.quadTo(mWaveHalfWidth*(multiplier+3)-distance,CurY+mWaveHight,mWaveHalfWidth*(multiplier+4)-distance,CurY);
 multiplier+=4;
 }
 distance +=mWaveHalfWidth/mWaveSpeed;
 distance = distance%(mWaveHalfWidth*4);

 mPath.lineTo(width,height);
 mPath.lineTo(0,height);
 mPath.close();
 canvas.drawPath(mPath, mPathPaint);
 /**
 * 对图片给进行缩放
 */
 int min = Math.min(width,height);
 backgroundBitmap = Bitmap.createScaledBitmap(backgroundBitmap,min,min,false);
 /**
 * 使用DST_ATOP，取上层非交集部分与下层交集部分 。
 */
 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_ATOP));
 /**
 * 绘制图片
 */
 canvas.drawBitmap(backgroundBitmap,0,0,paint);
 /**
 * 绘制进度文字
 */
 canvas.drawText(currentText, width/2, height/2, mTextPaint);
 return finalBmp;

distance +=mWaveHalfWidth/mWaveSpeed;
distance = distance%(mWaveHalfWidth*4);

int waveNum = width/((int)mWaveHalfWidth*4)+1;
 int multiplier = 0;
 for(int i =0;i<waveNum;i++){
  mPath.quadTo(mWaveHalfWidth*(multiplier+1)-distance,CurY-mWaveHight,mWaveHalfWidth*(multiplier+2)-distance,CurY);
  mPath.quadTo(mWaveHalfWidth*(multiplier+3)-distance,CurY+mWaveHight,mWaveHalfWidth*(multiplier+4)-distance,CurY);
  multiplier+=4;
 }

mPath.reset();
mPath.moveTo(0-distance,CurY);

mPath.lineTo(width,height);
mPath.lineTo(0,height);
mPath.close();
canvas.drawPath(mPath, mPathPaint);

int min = Math.min(width,height);
backgroundBitmap = Bitmap.createScaledBitmap(backgroundBitmap,min,min,false);

mPathPaint.setColor(Color.parseColor(mWaveColor));
mTextPaint.setColor(Color.parseColor(mTextColor));
mTextPaint.setTextSize(mTextSize);
canvas.drawText(currentText, width/2, height/2, mTextPaint);

private static final int INVALIDATE = 0X777;
 private Handler handler = new Handler() {
 @Override
 public void handleMessage(Message msg) {
  super.handleMessage(msg);
  switch (msg.what) {
  case INVALIDATE:
   invalidate();
   sendEmptyMessageDelayed(INVALIDATE,RefreshGap);
   break;
  }
 }
 };

 /**
 * @param currentProgress 当前进度
 * @param currentText 当前显示的进度文字
 */
 public void setCurrent(int currentProgress,String currentText) {
 this.currentProgress = currentProgress;
 this.currentText = currentText;
 }

 /**
 * @param maxProgress 设置进度条的最大值，默认100
 */
 public void setMaxProgress(int maxProgress){
 this.maxProgress = maxProgress;
 }

 /**
 * @param mTextColor 文字的颜色
 * @param mTextSize 文字的大小
 */
 public void setText(String mTextColor,int mTextSize){
 this.mTextColor = mTextColor;
 this.mTextSize = mTextSize;
 }
 /**
 * @param mWaveHight 波峰的高度
 * @param mWaveWidth 一个波峰的宽度
 */
 public void setWave(float mWaveHight,float mWaveWidth){
 this.mWaveHight = mWaveHight;
 this.mWaveHalfWidth = mWaveWidth/2;
 }

 /**
 * @param mWaveColor 水的颜色
 */
 public void setWaveColor(String mWaveColor){
 this.mWaveColor = mWaveColor;
 }
 /**
 * 值越大震荡的越慢
 * @param mWaveSpeed
 */
 public void setmWaveSpeed(int mWaveSpeed){
 this.mWaveSpeed = mWaveSpeed;
 }