Android实现动态圆环的图片头像控件

public void setImageDrawable(Drawable drawable) {   super.setImageDrawable(drawable);   mBitmap = getBitmapFromDrawable(drawable);   setup(); } private Bitmap getBitmapFromDrawable(Drawable drawable) {    if (drawable == null) {    return null;   }    if (drawable instanceof BitmapDrawable) {    //从bitmap中间裁剪出最大的正方形    Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();    return getMaxSquareCenter(bitmap);    //return ((BitmapDrawable) drawable).getBitmap();   }    try {    Bitmap bitmap;     if (drawable instanceof ColorDrawable) {     bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION, COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);    } else {     int min = Math.min(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());     bitmap = Bitmap.createBitmap(min, min, BITMAP_CONFIG);    }     Canvas canvas = new Canvas(bitmap);    int left,top,right,buttom;    int width = canvas.getWidth();    int height = canvas.getHeight();    int abs = Math.abs(width - height);    if(width <= height){     left = 0;     top = (height - abs) / 2;     right = width;     buttom = height - top;    }else{     left = (width - abs) / 2;     top = 0;     right = width - left;     buttom = height;    }    //drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());    drawable.setBounds(left, top, right, buttom);    drawable.draw(canvas);    return bitmap;   } catch (OutOfMemoryError e) {    return null;   }  } /**   * 从bitmap中间裁剪出最大的正方形   * @param bitmap   * @return   */  private Bitmap getMaxSquareCenter(Bitmap bitmap){   int w = bitmap.getWidth(); // 得到图片的宽，高   int h = bitmap.getHeight();   int cropWidth = w >= h ? h : w;// 裁切后所取的正方形区域边长   return Bitmap.createBitmap(bitmap, (w - cropWidth)/2 , (h - cropWidth)/2, cropWidth, cropWidth, null, false);  } 

private void updateShaderMatrix() {   float scale;   float dx = 0;   float dy = 0;    mShaderMatrix.set(null);    if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width() * mBitmapHeight) {    scale = mDrawableRect.height() / (float) mBitmapHeight / 2; //将图片缩放在正中间 缩小一倍    dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;   } else {    scale = mDrawableRect.width() / (float) mBitmapWidth / 2; //将图片缩放在正中间 缩小一倍    dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;   }    mShaderMatrix.setScale(scale , scale );  //在x轴上平移mDrawableRadius，就在正中间了   mShaderMatrix.postTranslate((int) (dx + 0.5f) + mBorderWidth + mDrawableRadius, (int) (dy + 0.5f) + mBorderWidth);    mBitmapShader.setLocalMatrix(mShaderMatrix);  } 

 private float mChangeRateBorder;//记录外圆执行动画时半径变化率  private float mChangeRateOuter;//记录内圆执行动画时半径变化率  private float mChangeRateInner;//记录图片边框执行动画时半径变化率  private float mChangeRange;//变化范围，View半径的1/6 //*******执行动画*******//  //外圆执行动画时半径变化率  private float mRateOuter[] = {    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,    0,0.1f,0.2f,0.3f,0.4f,0.5f,0.6f,0.7f,0.8f,0.9f,1.0f    ,0.92f,0.88f,0.85f,0.82f,0.76f,0.72f,0.68f,0.60f,0.54f,0.48f,    0.40f,0.33f,0.28f,0.20f};  //内圆执行动画时半径变化率  private float mRateInner[] = {    -1,-1,-1,-1,-1,    0,0.1f,0.2f,0.3f,0.4f,0.5f,0.6f,0.7f,0.8f,0.9f,1.0f    ,0.92f,0.88f,0.84f,0.80f,0.72f,0.67f,0.60f,0.54f,0.48f,-1f    ,-1f,-1f,-1f,-1f,-1f,-1f,-1f,-1f,-1f};  //图片边框执行动画时半径变化率  private float mRateBorder[] = {    0,0.1f,0.2f,0.3f,0.4f,0.5f,0.6f,0.7f,0.8f,0.9f,1.0f    ,0.92f,0.90f,0.84f,0.78f,0.72f,0.64f,0.58f,-1f,-1f,-1f    ,-1f,-1f,-1f,-1f,-1f,-1f,-1f,-1f,-1f,-1f    ,-1f,-1f,-1f,-1f};   private int mRateIndex;//动画变化率的索引 

/**   * 按住执行动画   */  private Handler mHandler = new Handler(){   @Override   public void handleMessage(Message msg) {    super.handleMessage(msg);    int index = mRateIndex ++;    mChangeRateBorder = mRateBorder[(index)% mRateBorder.length];    setPaintCorlor(mBorderPaint,mChangeRateBorder,DEFAULT_BORDER_COLOR);    setPaintAlpha(mBorderPaint,(index)% mRateBorder.length,mRateBorder);    mChangeRateOuter = mRateOuter[(index) % mRateOuter.length];    setPaintCorlor(mOuterPaint,mChangeRateOuter,mOuterPaintColor);    setPaintAlpha(mOuterPaint,(index) % mRateOuter.length,mRateOuter);    mChangeRateInner = mRateInner[(index) % mRateInner.length];    setPaintCorlor(mInnerPaint,mChangeRateInner,mInnerPaintColor);    setPaintAlpha(mInnerPaint,(index) % mRateInner.length,mRateInner);     //System.out.println("---------mChangeRate:"+mChangeRateBorder);    invalidate();    mHandler.removeCallbacksAndMessages(null);    mHandler.sendEmptyMessageDelayed(0,30);   }  }; 

@Override  protected void onDraw(Canvas canvas) {    if (getDrawable() == null) {    return;   }    //画动画的图形   canvas.drawCircle(getWidth() / 2,getHeight() / 2,getChangeRadiusOuter(mOuterRadius),mOuterPaint);   canvas.drawCircle(getWidth() / 2,getHeight() / 2,getChangeRadiusInner(mInnerRadius),mInnerPaint);    canvas.drawCircle(getWidth() / 2, getHeight() / 2, mDrawableRadius, mBitmapPaint);   canvas.drawCircle(getWidth() / 2, getHeight() / 2, getChangeRadiusBorder(mBorderRadius), mBorderPaint);  } 

private float getChangeRadiusBorder(float radius){    return mChangeRateBorder * mChangeRange + radius;   }  private float getChangeRadiusOuter(float radius){    return mChangeRateOuter * mChangeRange + radius;   }  private float getChangeRadiusInner(float radius){    return mChangeRateInner * mChangeRange + radius;   } 

/**   * 开始动画   */  public void startAnim(){  //让外围的圆环动起来   mHandler.sendEmptyMessageDelayed(0,30);   }  /**   * 停止动画   */  public void stopAnim(){  //停止外圆环的动画，展示默认的大小   mHandler.removeCallbacksAndMessages(null);   mChangeRateBorder = 0;   mChangeRateOuter = 0;   mChangeRateInner = 0;    initAnimColor();    enterAnim();  }  /**   * 进入动画   */  public void enterAnim(){  //展示外圆环，显示默认大小   mHandlerEnter.sendEmptyMessage(0);  }   /**   * 退出动画   */  public void exitAnim(){  //隐藏外圆环   mHandlerExit.sendEmptyMessage(0);  } 

import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapShader; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.RectF; import android.graphics.Shader; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.ColorDrawable; import android.graphics.drawable.Drawable; import android.os.Handler; import android.os.Message; import android.util.AttributeSet; import android.widget.ImageView;  /**  * Created by cj_28 on 2016/10/15.  */ public class DynamicAvatarView extends ImageView {   private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP;   private static final int COLORDRAWABLE_DIMENSION = 1;  private static final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888;   private Bitmap mBitmap;  private BitmapShader mBitmapShader;   private final Matrix mShaderMatrix = new Matrix();  private final Paint mBitmapPaint = new Paint();  private final Paint mBorderPaint = new Paint();  private final Paint mOuterPaint = new Paint();  private final Paint mInnerPaint = new Paint();   private static final int DEFAULT_BORDER_WIDTH = 3;  private static final int DEFAULT_BORDER_COLOR = Color.WHITE;  private static final int OUTER_PAINT_COLOR = Color.parseColor("#55FFFFFF");  private static final int INNER_PAINT_COLOR = Color.parseColor("#66FFFFFF");   private int mBorderColor = DEFAULT_BORDER_COLOR;  private int mBorderWidth = DEFAULT_BORDER_WIDTH;   private int mOuterPaintColor = OUTER_PAINT_COLOR;  private int mInnerPaintColor = INNER_PAINT_COLOR;   private int mBitmapWidth;  private int mBitmapHeight;   private final RectF mDrawableRect = new RectF();  private final RectF mBorderRect = new RectF();   private float mDrawableRadius;//显示的图片  private float mBorderRadius;//..//显示的图片上的边框  private float mOuterRadius;//外层动画  private float mInnerRadius;//..//内层动画   private float mRealDrawableRadius;//这是View没有被缩放之前的mDrawableRadius的半径  private float mRealBorderRadius;//..   private boolean mReady;  private boolean mSetupPending;   private float mChangeRateBorder;//记录外圆执行动画时半径变化率  private float mChangeRateOuter;//记录内圆执行动画时半径变化率  private float mChangeRateInner;//记录图片边框执行动画时半径变化率  private float mChangeRange;//变化范围，View半径的1/6   //*******执行动画*******//  //外圆执行动画时半径变化率  private float mRateOuter[] = {    -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,    0,0.1f,0.2f,0.3f,0.4f,0.5f,0.6f,0.7f,0.8f,0.9f,1.0f    ,0.92f,0.88f,0.85f,0.82f,0.76f,0.72f,0.68f,0.60f,0.54f,0.48f,    0.40f,0.33f,0.28f,0.20f};  //内圆执行动画时半径变化率  private float mRateInner[] = {    -1,-1,-1,-1,-1,    0,0.1f,0.2f,0.3f,0.4f,0.5f,0.6f,0.7f,0.8f,0.9f,1.0f    ,0.92f,0.88f,0.84f,0.80f,0.72f,0.67f,0.60f,0.54f,0.48f,-1f    ,-1f,-1f,-1f,-1f,-1f,-1f,-1f,-1f,-1f};  //图片边框执行动画时半径变化率  private float mRateBorder[] = {    0,0.1f,0.2f,0.3f,0.4f,0.5f,0.6f,0.7f,0.8f,0.9f,1.0f    ,0.92f,0.90f,0.84f,0.78f,0.72f,0.64f,0.58f,-1f,-1f,-1f    ,-1f,-1f,-1f,-1f,-1f,-1f,-1f,-1f,-1f,-1f    ,-1f,-1f,-1f,-1f};   //private int mColor[] = {0x55FFFFFF,0x44FFFFFF,0x33FFFFFF,0x22FFFFFF,0x11FFFFFF,0x00FFFFFF,0x00FFFFFF,0x00FFFFFF,0x00FFFFFF,0x00FFFFFF};  private int mRateIndex;//动画变化率的索引   //*******进入动画*******//  //外圆执行动画时半径变化率  private float mRateOuterEnter[] = {    -2,-2,//外圆要缩小2个mChangeRange才会完全隐藏    -2,-2,-2,-2,-2,    -0.8f,-0.6f,-0.4f,-0.2f,-0.1f,    0,0.1f,0.2f,0.3f,0.4f,0.5f    ,0.44f,0.4f,0.35f,0.3f,0.25f    ,0.20f,0.15f,0.1f,0.0f};  //内圆执行动画时半径变化率  private float mRateInnerEnter[] = {    -1,-1,//外圆要缩小1个mChangeRange才会完全隐藏    -0.8f,-0.6f,-0.4f,-0.2f,-0.1f,    0,0.1f,0.2f,0.3f,0.35f,0.4f    ,0.45f,0.5f,0.45f,0.4f,0.35f    ,0.3f,0.25f,0.2f,0.15f,0.1f    ,0.05f,0f,0f,0f};  private int mRateIndexEnter;//进入动画变化率的索引   //*******退出动画*******//  //外圆执行动画时半径变化率  private float mRateOuterExit[] = {     0.0f,-0.2f,-0.4f,-0.6f,-0.8f    ,-1f,-1.2f,-1.4f,-1.6f,-1.8f    ,-2f};  //内圆执行动画时半径变化率  private float mRateInnerExit[] = {     0.0f,-0.1f,-0.2f,-0.3f,-0.4f    ,-0.5f,-0.6f,-0.7f,-0.8f,-0.9f    ,-1f};  private int mRateIndexExit;//进入动画变化率的索引    /**   * 按住执行动画   */  private Handler mHandler = new Handler(){   @Override   public void handleMessage(Message msg) {    super.handleMessage(msg);    int index = mRateIndex ++;    mChangeRateBorder = mRateBorder[(index)% mRateBorder.length];    setPaintCorlor(mBorderPaint,mChangeRateBorder,DEFAULT_BORDER_COLOR);    setPaintAlpha(mBorderPaint,(index)% mRateBorder.length,mRateBorder);    mChangeRateOuter = mRateOuter[(index) % mRateOuter.length];    setPaintCorlor(mOuterPaint,mChangeRateOuter,mOuterPaintColor);    setPaintAlpha(mOuterPaint,(index) % mRateOuter.length,mRateOuter);    mChangeRateInner = mRateInner[(index) % mRateInner.length];    setPaintCorlor(mInnerPaint,mChangeRateInner,mInnerPaintColor);    setPaintAlpha(mInnerPaint,(index) % mRateInner.length,mRateInner);     //System.out.println("---------mChangeRate:"+mChangeRateBorder);    invalidate();    mHandler.removeCallbacksAndMessages(null);    mHandler.sendEmptyMessageDelayed(0,30);   }  };   private Handler mHandlerEnter = new Handler(){   @Override   public void handleMessage(Message msg) {    super.handleMessage(msg);    int index = mRateIndexEnter ++;    if(index >= mRateOuterEnter.length) {     mRateIndexEnter = 0;     mHandlerEnter.removeCallbacksAndMessages(null);     return;    }     mChangeRateOuter = mRateOuterEnter[(index) % mRateOuterEnter.length];     mChangeRateInner = mRateInnerEnter[(index) % mRateInnerEnter.length];     invalidate();    mHandlerEnter.removeCallbacksAndMessages(null);    mHandlerEnter.sendEmptyMessageDelayed(0,20);   }  };   private Handler mHandlerExit = new Handler(){   @Override   public void handleMessage(Message msg) {    super.handleMessage(msg);    int index = mRateIndexExit ++;    if(index >= mRateOuterExit.length) {     mRateIndexExit = 0;     mHandlerExit.removeCallbacksAndMessages(null);     return;    }     mChangeRateOuter = mRateOuterExit[(index) % mRateOuterExit.length];     mChangeRateInner = mRateInnerExit[(index) % mRateInnerExit.length];     invalidate();    mHandlerExit.removeCallbacksAndMessages(null);    mHandlerExit.sendEmptyMessageDelayed(0,20);   }  };   /**   * 设置outer和inner的画笔颜色   * @param paint   * @param rate   * @param color   */  private void setPaintCorlor(Paint paint,float rate,int color){   if(rate < 0){    paint.setColor(Color.TRANSPARENT);   }else{    paint.setColor(color);   }  }   /**   * 设置透明度   * @param paint   * @param index   * @param rate   */  private void setPaintAlpha(Paint paint,int index,float[] rate){   int pre = index -1;   if(pre >= 0 ){    if(rate[pre] > rate[index] && rate[index] > 0){     int color = paint.getColor();      int colorTransparent = color & 0xff000000;     int colorValue = color & 0x00ffffff;     colorTransparent = colorTransparent >>> 7;     paint.setColor((int)(rate[index] * colorTransparent) << 7 | colorValue);     }   }  }   public DynamicAvatarView(Context context) {   this(context,null);  }   public DynamicAvatarView(Context context, AttributeSet attrs) {   this(context, attrs,0);   }   public DynamicAvatarView(Context context, AttributeSet attrs, int defStyleAttr) {   super(context, attrs, defStyleAttr);   super.setScaleType(SCALE_TYPE);    //可以执行了   mReady = true;    if (mSetupPending) {    setup();    mSetupPending = false;   }  }   @Override  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {    int widthMode = MeasureSpec.getMode(widthMeasureSpec);   int widthSize = MeasureSpec.getSize(widthMeasureSpec);   int heightMode = MeasureSpec.getMode(heightMeasureSpec);   int heightSize = MeasureSpec.getSize(heightMeasureSpec);    int size = Math.min(widthSize, heightSize);    super.onMeasure(MeasureSpec.makeMeasureSpec(size,widthMode), MeasureSpec.makeMeasureSpec(size,heightMode));  }   @Override  protected void onLayout(boolean changed, int left, int top, int right, int bottom) {    super.onLayout(changed, left, top, right, bottom);   enterAnim();  }   @Override  protected void onDraw(Canvas canvas) {    if (getDrawable() == null) {    return;   }    //画动画的图形   canvas.drawCircle(getWidth() / 2,getHeight() / 2,getChangeRadiusOuter(mOuterRadius),mOuterPaint);   canvas.drawCircle(getWidth() / 2,getHeight() / 2,getChangeRadiusInner(mInnerRadius),mInnerPaint);    canvas.drawCircle(getWidth() / 2, getHeight() / 2, mDrawableRadius, mBitmapPaint);   canvas.drawCircle(getWidth() / 2, getHeight() / 2, getChangeRadiusBorder(mBorderRadius), mBorderPaint);  }   private float getChangeRadiusBorder(float radius){    return mChangeRateBorder * mChangeRange + radius;   }  private float getChangeRadiusOuter(float radius){    return mChangeRateOuter * mChangeRange + radius;   }  private float getChangeRadiusInner(float radius){    return mChangeRateInner * mChangeRange + radius;   }   private void initAnimColor(){   mOuterPaint.setStyle(Paint.Style.FILL);   mOuterPaint.setAntiAlias(true);   mOuterPaint.setColor(mOuterPaintColor);   mInnerPaint.setStyle(Paint.Style.FILL);   mInnerPaint.setAntiAlias(true);   mInnerPaint.setColor(mInnerPaintColor);   //图片边框（默认白色）   mBorderPaint.setColor(mBorderColor);    mOuterRadius = mRealBorderRadius / 6 * 5;   mInnerRadius = mRealBorderRadius / 6 * 4;   mChangeRange = mRealBorderRadius / 6;   mRateIndex = 0;  }   /**   * 开始动画   */  public void startAnim(){   mHandler.sendEmptyMessageDelayed(0,30);   }  /**   * 停止动画   */  public void stopAnim(){   mHandler.removeCallbacksAndMessages(null);   mChangeRateBorder = 0;   mChangeRateOuter = 0;   mChangeRateInner = 0; //  mBorderPaint.setColor(DEFAULT_BORDER_COLOR); //  mOuterPaint.setColor(mOuterPaintColor); //  mInnerPaint.setColor(mInnerPaintColor); //  mRateIndex = 0;   initAnimColor();    //invalidate();   enterAnim();  }  /**   * 进入动画   */  public void enterAnim(){   mHandlerEnter.sendEmptyMessage(0);  }   /**   * 退出动画   */  public void exitAnim(){   mHandlerExit.sendEmptyMessage(0);  }   /**   * 设置外圆动画的颜色   * @param outerPaintColor   */  public void setOuterPaintColor(int outerPaintColor) {   if (outerPaintColor == mOuterPaintColor) {    return;   }   mOuterPaintColor = outerPaintColor;   mOuterPaint.setColor(mOuterPaintColor);   invalidate();  }   /**   * 设置内圆动画的颜色   * @param innerPaintColor   */  public void setInnerPaintColor(int innerPaintColor) {   if (innerPaintColor == mInnerPaintColor) {    return;   }   mInnerPaintColor = innerPaintColor;   mInnerPaint.setColor(mInnerPaintColor);   invalidate();  }   /**   * 设置图片边框的颜色   * @param borderColor   */  public void setBorderColor(int borderColor) {   if (borderColor == mBorderColor) {    return;   }    mBorderColor = borderColor;   mBorderPaint.setColor(mBorderColor);   invalidate();  }   /**   * 设置图片边框的宽度   * @param borderWidth   */  public void setBorderWidth(int borderWidth) {   if (borderWidth == mBorderWidth) {    return;   }    mBorderWidth = borderWidth;   setup();  }   @Override  public ScaleType getScaleType() {   return SCALE_TYPE;  }   @Override  public void setScaleType(ScaleType scaleType) {   if (scaleType != SCALE_TYPE) {    throw new IllegalArgumentException(String.format("ScaleType %s not supported.", scaleType));   }  }   @Override  protected void onSizeChanged(int w, int h, int oldw, int oldh) {   super.onSizeChanged(w, h, oldw, oldh);   //只有在此方法中调用setup，setup中的getWidth方法得到的值才不会是0，   setup();  }   @Override  public void setImageBitmap(Bitmap bm) {   super.setImageBitmap(bm);   mBitmap = getMaxSquareCenter(bm);   setup();  }   /**   * mxl中设置src就会走此方法   * @param drawable   */  @Override  public void setImageDrawable(Drawable drawable) {   super.setImageDrawable(drawable);   mBitmap = getBitmapFromDrawable(drawable);   setup();  }   @Override  public void setImageResource(int resId) {   super.setImageResource(resId);   mBitmap = getBitmapFromDrawable(getDrawable());   setup();  }   /**   * 从bitmap中间裁剪出最大的正方形   * @param bitmap   * @return   */  private Bitmap getMaxSquareCenter(Bitmap bitmap){   int w = bitmap.getWidth(); // 得到图片的宽，高   int h = bitmap.getHeight();   int cropWidth = w >= h ? h : w;// 裁切后所取的正方形区域边长   return Bitmap.createBitmap(bitmap, (w - cropWidth)/2 , (h - cropWidth)/2, cropWidth, cropWidth, null, false);  }   private Bitmap getBitmapFromDrawable(Drawable drawable) {    if (drawable == null) {    return null;   }    if (drawable instanceof BitmapDrawable) {    //从bitmap中间裁剪出最大的正方形    Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();    return getMaxSquareCenter(bitmap);    //return ((BitmapDrawable) drawable).getBitmap();   }    try {    Bitmap bitmap;     if (drawable instanceof ColorDrawable) {     bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION, COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);    } else {     int min = Math.min(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());     bitmap = Bitmap.createBitmap(min, min, BITMAP_CONFIG);    }     Canvas canvas = new Canvas(bitmap);    int left,top,right,buttom;    int width = canvas.getWidth();    int height = canvas.getHeight();    int abs = Math.abs(width - height);    if(width <= height){     left = 0;     top = (height - abs) / 2;     right = width;     buttom = height - top;    }else{     left = (width - abs) / 2;     top = 0;     right = width - left;     buttom = height;    }    //drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());    drawable.setBounds(left, top, right, buttom);    drawable.draw(canvas);    return bitmap;   } catch (OutOfMemoryError e) {    return null;   }  }   private void setup() {   //只有执行过构造函数之后，所有的成员才被初始化完毕   if (!mReady) {    mSetupPending = true;    return;   }    if (mBitmap == null) {    return;   }    mBitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);    mBitmapPaint.setAntiAlias(true);   mBitmapPaint.setShader(mBitmapShader);    mBorderPaint.setStyle(Paint.Style.STROKE);   mBorderPaint.setAntiAlias(true);   mBorderPaint.setColor(mBorderColor);   mBorderPaint.setStrokeWidth(mBorderWidth);    mBitmapHeight = mBitmap.getHeight();   mBitmapWidth = mBitmap.getWidth();   //图片边框设置的范围   mBorderRect.set(0, 0, getWidth(), getHeight());   mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2, (mBorderRect.width() - mBorderWidth) / 2) / 2;   mRealBorderRadius = 2 * mBorderRadius;   //图片显示的范围   mDrawableRect.set(mBorderWidth, mBorderWidth, mBorderRect.width() - mBorderWidth, mBorderRect.height() - mBorderWidth);   //让图片显示的范围是控件大小的一半   mDrawableRadius = Math.min(mDrawableRect.height() / 2, mDrawableRect.width() / 2) / 2;   mRealDrawableRadius = 2 * mDrawableRadius;    updateShaderMatrix();   initAnimColor();   invalidate();  }   private void updateShaderMatrix() {   float scale;   float dx = 0;   float dy = 0;    mShaderMatrix.set(null);    if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width() * mBitmapHeight) {    scale = mDrawableRect.height() / (float) mBitmapHeight / 2; //将图片缩放在正中间    dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;   } else {    scale = mDrawableRect.width() / (float) mBitmapWidth / 2;    dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;   }    mShaderMatrix.setScale(scale , scale );   mShaderMatrix.postTranslate((int) (dx + 0.5f) + mBorderWidth + mDrawableRadius, (int) (dy + 0.5f) + mBorderWidth);    mBitmapShader.setLocalMatrix(mShaderMatrix);  }  }