Android Open Source - RoundImageView Round Image View

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2015 The Android Open Source Project.
 */*from  w  ww  .  jav  a  2  s .  co  m*/
 *        yinglovezhuzhu@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.opensource.widget;


import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.TransitionDrawable;
import android.util.AttributeSet;
import android.widget.ImageView;

/**
 * 
 * ???????ImageView??????????????????<br>
 * 
 * <p>??????ImageView?????????????{@link Drawable}?<br>
 * ??{@link ImageView#getDrawable()}?????{@link Drawable}?<br>
 * ???{@link BitmapDrawable#getPaint()}????????<br>
 * ??saveLayer?????????????????<br>
 * ?????{@link Paint#setXfermode(android.graphics.Xfermode)}??PorterDuffXfermode?<br>
 * ??????????????<br>
 * <p>?????????ImageView?scaleType<br>
 * <p>???<br>
 * 1??????????????onDraw????ui???PorterDuffXfermode???SRC_IN?????????????
 * ??????????????????????????????????Anr?<br><br>
 * 2???????????????????????????????????{@link BitmapDrawable}?????????xml??????
 * ??????{@link ImageView#setImageBitmap(android.graphics.Bitmap)}??{@link ImageView#setImageResource(int)}
 * ?????????????????????????????{@link ImageView#setImageDrawable(Drawable)}????????,
 * ?????????{@link BitmapDrawable} ???????????????????????????????????????
 * ??????????{@link TransitionDrawable}????????????????
 * 
 * <p><font color="#FF0000">
 * ??????????????????????????????
 * ???????????????{@link ImageView.ScaleType#CENTER_CROP},??????????????????
 * ???????????????????????????????????????????????????????
 * ?????????????????????????????????
 * 
 * </font>
 * 
 * @author yinglovezhuzhu@gmail.com
 * 
 * @version 1.0
 * 
 */
public class RoundImageView extends BaseRoundImageView {
  
  private final PorterDuffXfermode mModeSrcIn = new PorterDuffXfermode(Mode.SRC_IN);
  private final PorterDuffXfermode mModeDstOver = new PorterDuffXfermode(Mode.DST_OVER);

  public RoundImageView(Context context) {
    super(context);
  }

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

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

  @Override
  protected void onDraw(Canvas canvas) {
      if(mCornerRate <= DEFAULT_CORNER_RATE && mCornerRadius <= DEFAULT_CORNER_RADIUS) {
        // ??????????????????????
        super.onDraw(canvas);
        return;
      }
      
    Drawable drawable = this.getDrawable();
    if (drawable == null) {
      super.onDraw(canvas);
      return;
    }

    if(mViewWidth <= 0 || mViewHeight <= 0) {
      super.onDraw(canvas);
      return;
    }
    
        if (drawable instanceof BitmapDrawable) {
          
          int diameter = mViewWidth > mViewHeight ? mViewHeight : mViewWidth;
            Paint paint = ((BitmapDrawable) drawable).getPaint();
            paint.setAntiAlias(true);
            paint.setStyle(Style.FILL);
            
            mDrawRect.set(0, 0, mViewWidth, mViewHeight);
            
            int saveCount = canvas.saveLayerAlpha(mDrawRect, 255, Canvas.MATRIX_SAVE_FLAG | Canvas.CLIP_SAVE_FLAG 
                | Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | Canvas.FULL_COLOR_LAYER_SAVE_FLAG  
                    | Canvas.CLIP_TO_LAYER_SAVE_FLAG);
      
            canvas.drawARGB(0, 0, 0, 0); 

          float radius = 0;
          if(mCornerRate > DEFAULT_CORNER_RATE) { // ????
            radius = ((float) diameter) / mCornerRate;
          } else if(mCornerRadius > DEFAULT_CORNER_RADIUS) { // ???????
            float halfDiameter = ((float) diameter) / 2;
            // ????????????????????????????????????
            radius = mCornerRadius > halfDiameter ? halfDiameter : mCornerRadius;
          } else { // ????????????
            super.onDraw(canvas);
            return;
          }
          
            if(mBorderThickness != DEFAUTL_BORDER_THICKNESS) { // ????
              
              float drawableRadius = radius - mBorderThickness;
              paint.setColor(mFillColor);
              mTempRect.set(mDrawRect.left + mBorderThickness, mDrawRect.top + mBorderThickness, 
                  mDrawRect.right - mBorderThickness, mDrawRect.bottom - mBorderThickness);
              canvas.drawRoundRect(mTempRect, drawableRadius, drawableRadius, paint);  
              paint.setXfermode(mModeSrcIn);  
              super.onDraw(canvas);

              paint.setXfermode(mModeDstOver);
              paint.setColor(mBorderColor);
              canvas.drawRoundRect(mDrawRect, radius, radius, paint);  
            } else if(mBorderInsideThickness != DEFAUTL_BORDER_THICKNESS 
                || mBorderOutsideThickness != DEFAUTL_BORDER_THICKNESS) { // ????
              
              float drawableRadius = radius - mBorderInsideThickness - mBorderOutsideThickness;
              
              if(mBorderInsideThickness == DEFAUTL_BORDER_THICKNESS) { // ??????
                  paint.setColor(mFillColor);
                  mTempRect.set(mDrawRect.left + mBorderOutsideThickness, mDrawRect.top + mBorderOutsideThickness, 
                      mDrawRect.right - mBorderOutsideThickness, mDrawRect.bottom - mBorderOutsideThickness);
                  canvas.drawRoundRect(mTempRect, drawableRadius, drawableRadius, paint);  
                  paint.setXfermode(mModeSrcIn);  
                  super.onDraw(canvas);
                  paint.setColor(mBorderOutsideColor);
              } else if(mBorderOutsideThickness == DEFAUTL_BORDER_THICKNESS) { // ??????
                
                paint.setColor(mFillColor);
                mTempRect.set(mDrawRect.left + mBorderInsideThickness, mDrawRect.top + mBorderInsideThickness, 
                    mDrawRect.right - mBorderInsideThickness, mDrawRect.bottom - mBorderInsideThickness);
                canvas.drawRoundRect(mTempRect, drawableRadius, drawableRadius, paint);  
                paint.setXfermode(mModeSrcIn);  
                super.onDraw(canvas);
                paint.setColor(mBorderInsideColor);
              } else { // ????
                
                paint.setColor(mFillColor);
                mTempRect.set(mDrawRect.left + mBorderInsideThickness + mBorderOutsideThickness, 
                    mDrawRect.top + mBorderInsideThickness + mBorderOutsideThickness, 
                    mDrawRect.right - mBorderInsideThickness - mBorderOutsideThickness, 
                    mDrawRect.bottom - mBorderInsideThickness - mBorderOutsideThickness);
                canvas.drawRoundRect(mTempRect, drawableRadius, drawableRadius, paint);  
                paint.setXfermode(mModeSrcIn);  
                super.onDraw(canvas);
                
                float insideBorderRadius = radius - mBorderOutsideThickness;
                paint.setXfermode(mModeDstOver);
                paint.setColor(mBorderInsideColor);
                mTempRect.set(mDrawRect.left + mBorderOutsideThickness, 
                    mDrawRect.top + mBorderOutsideThickness, 
                    mDrawRect.right - mBorderOutsideThickness, 
                    mDrawRect.bottom - mBorderOutsideThickness);
                canvas.drawRoundRect(mTempRect, insideBorderRadius, insideBorderRadius, paint);  
                
                paint.setColor(mBorderOutsideColor);
              }
              
              paint.setXfermode(mModeDstOver);
              canvas.drawRoundRect(mDrawRect, radius, radius, paint);
              
            } else { // ??
              paint.setColor(Color.WHITE);
              canvas.drawRoundRect(mDrawRect, radius, radius, paint);  
              paint.setXfermode(mModeSrcIn);  
              super.onDraw(canvas);
              
              paint.setXfermode(mModeDstOver);
              paint.setColor(Color.TRANSPARENT);
              canvas.drawRoundRect(mDrawRect, radius, radius, paint);  
              
            }
            canvas.restoreToCount(saveCount);
            
        } else {  
            super.onDraw(canvas);  
        }  
  }
}

Java Source Code List

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