content: package com.cjj.bb.view;
  
  
  import android.content.Context;
  import android.content.res.TypedArray;
  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.net.Uri;
  import android.util.AttributeSet;
  import android.widget.ImageView;
  
  import com.cjj.bb.R;
  
  
  public class CircleImageView extends ImageView {
  
      private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP;
  
      private static final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888;
      private static final int COLORDRAWABLE_DIMENSION = 1;
  
      private static final int DEFAULT_BORDER_WIDTH = 0;
      private static final int DEFAULT_BORDER_COLOR = Color.BLACK;
  
      private final RectF mDrawableRect = new RectF();
      private final RectF mBorderRect = new RectF();
  
      private final Matrix mShaderMatrix = new Matrix();
      private final Paint mBitmapPaint = new Paint();
      private final Paint mBorderPaint = new Paint();
  
      private int mBorderColor = DEFAULT_BORDER_COLOR;
      private int mBorderWidth = DEFAULT_BORDER_WIDTH;
  
      private Bitmap mBitmap;
      private BitmapShader mBitmapShader;
      private int mBitmapWidth;
      private int mBitmapHeight;
  
      private float mDrawableRadius;
      private float mBorderRadius;
  
      private boolean mReady;
      private boolean mSetupPending;
  
      public CircleImageView(Context context) {
          super(context);
  
          init();
      }
  
      public CircleImageView(Context context, AttributeSet attrs) {
          this(context, attrs, 0);
      }
  
      public CircleImageView(Context context, AttributeSet attrs, int defStyle) {
          super(context, attrs, defStyle);
  
          TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircleImageView, defStyle, 0);
  
          mBorderWidth = a.getDimensionPixelSize(R.styleable.CircleImageView_border_width, DEFAULT_BORDER_WIDTH);
          mBorderColor = a.getColor(R.styleable.CircleImageView_border_color, DEFAULT_BORDER_COLOR);
  
          a.recycle();
  
          init();
      }
  
      private void init() {
          super.setScaleType(SCALE_TYPE);
          mReady = true;
  
          if (mSetupPending) {
              setup();
              mSetupPending = false;
          }
      }
  
      @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 onDraw(Canvas canvas) {
          if (getDrawable() == null) {
              return;
          }
  
          canvas.drawCircle(getWidth() / 2, getHeight() / 2, mDrawableRadius, mBitmapPaint);
          if (mBorderWidth != 0) {
              canvas.drawCircle(getWidth() / 2, getHeight() / 2, mBorderRadius, mBorderPaint);
          }
      }
  
      @Override
      protected void onSizeChanged(int w, int h, int oldw, int oldh) {
          super.onSizeChanged(w, h, oldw, oldh);
          setup();
      }
  
      public int getBorderColor() {
          return mBorderColor;
      }
  
      public void setBorderColor(int borderColor) {
          if (borderColor == mBorderColor) {
              return;
          }
  
          mBorderColor = borderColor;
          mBorderPaint.setColor(mBorderColor);
          invalidate();
      }
  
      public int getBorderWidth() {
          return mBorderWidth;
      }
  
      public void setBorderWidth(int borderWidth) {
          if (borderWidth == mBorderWidth) {
              return;
          }
  
          mBorderWidth = borderWidth;
          setup();
      }
  
      @Override
      public void setImageBitmap(Bitmap bm) {
          super.setImageBitmap(bm);
          mBitmap = bm;
          setup();
      }
  
      @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();
      }
  
      @Override
      public void setImageURI(Uri uri) {
          super.setImageURI(uri);
          mBitmap = getBitmapFromDrawable(getDrawable());
          setup();
      }
  
      private Bitmap getBitmapFromDrawable(Drawable drawable) {
          if (drawable == null) {
              return null;
          }
  
          if (drawable instanceof BitmapDrawable) {
              return ((BitmapDrawable) drawable).getBitmap();
          }
  
          try {
              Bitmap bitmap;
  
              if (drawable instanceof ColorDrawable) {
                  bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION, COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);
              } else {
                  bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), BITMAP_CONFIG);
              }
  
              Canvas canvas = new Canvas(bitmap);
              drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
              drawable.draw(canvas);
              return bitmap;
          } catch (OutOfMemoryError e) {
              return null;
          }
      }
  
      private void setup() {
          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();
  
          mBorderRect.set(0, 0, getWidth(), getHeight());
          mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2, (mBorderRect.width() - mBorderWidth) / 2);
  
          mDrawableRect.set(mBorderWidth, mBorderWidth, mBorderRect.width() - mBorderWidth, mBorderRect.height() - mBorderWidth);
          mDrawableRadius = Math.min(mDrawableRect.height() / 2, mDrawableRect.width() / 2);
  
          updateShaderMatrix();
          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;
              dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;
          } else {
              scale = mDrawableRect.width() / (float) mBitmapWidth;
              dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;
          }
  
          mShaderMatrix.setScale(scale, scale);
          mShaderMatrix.postTranslate((int) (dx + 0.5f) + mBorderWidth, (int) (dy + 0.5f) + mBorderWidth);
  
          mBitmapShader.setLocalMatrix(mShaderMatrix);
      }
  
  }