Android(安卓)圆形和圆角图片 AppCompatImageView封装

源码下载：https://download.csdn.net/download/explorerqp/11317063
补充：
1.此Demo可以对任意矩形图片进行截取圆形。
2.矩形的圆角大小可以设置参数radius来调整圆角的大小。
效果图：
自定义RoundRecImageView：
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.Drawable;import android.support.v7.widget.AppCompatImageView;import android.util.AttributeSet;import com.dlzs.progress.demoprogress.R;public class RoundRecImageView extends AppCompatImageView {    private static final int DEFAULT_BORDER_WIDTH = 0;    private static final int DEFAULT_BORDER_COLOR = Color.WHITE;    private int mBorderColor;    private int mBorderWidth;    private Paint paintImage;    private Paint paintBorder;    /**     * 圆角的幅度     **/    private float mRadius;    /**     * 是否是圆形     **/    private boolean mIsCircle;    public RoundRecImageView(final Context context) {        this(context, null);    }    public RoundRecImageView(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public RoundRecImageView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        this.setScaleType(ScaleType.FIT_XY);        // 获取自定属性配置        TypedArray ta = context.obtainStyledAttributes(attrs,                R.styleable.CircleImageView, defStyle, 0);        mRadius = ta.getDimensionPixelSize(R.styleable.CircleImageView_radius, 0);        mIsCircle = ta.getBoolean(R.styleable.CircleImageView_circle, false);        mBorderColor = ta.getColor(R.styleable.CircleImageView_border_color, DEFAULT_BORDER_COLOR);        mBorderWidth = ta.getDimensionPixelSize(R.styleable.CircleImageView_border_width, DEFAULT_BORDER_WIDTH);        ta.recycle();        paintImage = new Paint();        paintImage.setAntiAlias(true);        paintBorder = new Paint();        paintBorder.setAntiAlias(true);    }    @Override    public void onDraw(Canvas canvas) {        // 去点padding值        int viewWidth = canvas.getWidth() - getPaddingLeft() - getPaddingRight();        int viewHeight = canvas.getHeight() - getPaddingTop() - getPaddingBottom();        // 获取iamgeView 中的drawable 并转成bitmap        Bitmap image = drawableToBitmap(getDrawable());        // 对获取到的bitmap 按照当前imageView的宽高进行缩放        Bitmap reSizeImage = reSizeImage(image, viewWidth, viewHeight);        int imgWidth = reSizeImage.getWidth();        int imgHight = reSizeImage.getHeight();        paintBorder.setColor(mBorderColor);        paintBorder.setStrokeWidth(mBorderWidth);        paintBorder.setStyle(Paint.Style.FILL_AND_STROKE);        // 判断当前需要绘制圆角还是圆        if (mIsCircle) {            //画边线            canvas.drawCircle(viewWidth / 2, viewHeight / 2, (Math.min(viewWidth, viewHeight) / 2) - mBorderWidth / 2, paintBorder);            //设置画笔            BitmapShader bitmapShader = new BitmapShader(reSizeImage, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);            paintImage.setShader(bitmapShader);            //画布移动(x,y),移动量为边框宽度            canvas.translate(mBorderWidth, mBorderWidth);            canvas.drawCircle(imgWidth / 2, imgHight / 2, Math.min(imgWidth, imgHight) / 2, paintImage);        } else {            //画边线            RectF rectB = new RectF(mBorderWidth / 2, mBorderWidth / 2, viewWidth - mBorderWidth / 2, viewHeight - mBorderWidth / 2);            canvas.drawRoundRect(rectB, mRadius, mRadius, paintBorder);            BitmapShader bitmapShader = new BitmapShader(reSizeImage, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);            paintImage.setShader(bitmapShader);            RectF rect = new RectF(0, 0, imgWidth, imgHight);            //弧度半径(有边框无圆角)            float radius = mBorderWidth == 0 ? mRadius : 0;            //画布移动(x,y),移动量为边框宽度            canvas.translate(mBorderWidth, mBorderWidth);            canvas.drawRoundRect(rect, radius, radius, paintImage);        }    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        int width = MeasureSpec.getSize(widthMeasureSpec);        int height = MeasureSpec.getSize(heightMeasureSpec);        setMeasuredDimension(width, height);    }    /**     * drawable转bitmap     *     * @param drawable     * @return     */    private Bitmap drawableToBitmap(Drawable drawable) {        if (drawable == null) {            return null;        } else if (drawable instanceof BitmapDrawable) {            return ((BitmapDrawable) drawable).getBitmap();        }//        //后加的判断xUtils注解时，需要单独处理//        else if(drawable instanceof AsyncDrawable){//            Bitmap b = Bitmap//                    .createBitmap(//                            getWidth(),//                            getHeight(),//                            drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888//                                    : Bitmap.Config.RGB_565);//            Canvas canvas1 = new Canvas(b);//            // canvas.setBitmap(bitmap);//            drawable.setBounds(0, 0, getWidth(),//                    getHeight());//            drawable.draw(canvas1);//            return b;//        }        Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicHeight(),                drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);        Canvas canvas = new Canvas(bitmap);        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());        drawable.draw(canvas);        return bitmap;    }    /**     * 重设Bitmap的宽高     *     * @param bitmap     * @param newWidth     * @param newHeight     * @return     */    private Bitmap reSizeImage(Bitmap bitmap, int newWidth, int newHeight) {        int width = bitmap.getWidth();        int height = bitmap.getHeight();        //取得正方形边长        int sideL = Math.min(width, height);        //取得原点轴坐标        int x = 0;        int y = 0;        if (width > height) {            x = (width - height) / 2;        } else {            y = (height - width) / 2;        }        Bitmap bitmapSquare = Bitmap.createBitmap(bitmap, x, y, sideL, sideL);        width = bitmapSquare.getWidth();        height = bitmapSquare.getHeight();        // 计算出缩放比        float scaleHeight = (float) (newHeight - (mBorderWidth * 2)) / height;        float scaleWidth = (float) (newWidth - (mBorderWidth * 2)) / width;        // 矩阵缩放bitmap        Matrix matrix = new Matrix();        matrix.postScale(scaleWidth, scaleHeight);        return Bitmap.createBitmap(bitmapSquare, 0, 0, width, height, matrix, true);    }}
attrs.xml：
layout：
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