自定义圆形控件 RoundImageView

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1、自定义圆形控件 RoundImageView

package com.ronye.CustomView;import android.content.Context;import android.content.res.TypedArray;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.PorterDuff;import android.graphics.PorterDuffXfermode;import android.graphics.Rect;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.graphics.drawable.NinePatchDrawable;import android.util.AttributeSet;import android.widget.ImageView;import com.ronye.R;/** * Created by ${zyj} on 2015/8/27. * 描述： 自定义圆形图片 */public class RoundImageView  extends ImageView {    private int mBorderThickness = 0;    private Context mContext;    private int defaultColor = 0xFFFFFFFF;    // 如果只有其中一个有值，则只画一个圆形边框    private int mBorderOutsideColor = 0;    private int mBorderInsideColor = 0;    // 控件默认长、宽    private int defaultWidth = 0;    private int defaultHeight = 0;    public RoundImageView(Context context) {        super(context);        mContext = context;    }    public RoundImageView(Context context, AttributeSet attrs) {        super(context, attrs);        mContext = context;        setCustomAttributes(attrs);    }    public RoundImageView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        mContext = context;        setCustomAttributes(attrs);    }    private void setCustomAttributes(AttributeSet attrs) {        TypedArray a = mContext.obtainStyledAttributes(attrs,R.styleable.roundedimageview);        mBorderThickness = a.getDimensionPixelSize(R.styleable.roundedimageview_border_thickness, 0);        mBorderOutsideColor = a.getColor(R.styleable.roundedimageview_border_outside_color,defaultColor);        mBorderInsideColor = a.getColor(R.styleable.roundedimageview_border_inside_color, defaultColor);    }    @Override    protected void onDraw(Canvas canvas) {        Drawable drawable = getDrawable() ;        if (drawable == null) {            return;        }        if (getWidth() == 0 || getHeight() == 0) {            return;        }        this.measure(0, 0);        if (drawable.getClass() == NinePatchDrawable.class)            return;        Bitmap b = ((BitmapDrawable) drawable).getBitmap();        Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);        if (defaultWidth == 0) {            defaultWidth = getWidth();        }        if (defaultHeight == 0) {            defaultHeight = getHeight();        }        int radius = 0;        if (mBorderInsideColor != defaultColor && mBorderOutsideColor != defaultColor) {// 定义画两个边框，分别为外圆边框和内圆边框            radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - 2 * mBorderThickness;            // 画内圆            drawCircleBorder(canvas, radius + mBorderThickness / 2,mBorderInsideColor);            // 画外圆            drawCircleBorder(canvas, radius + mBorderThickness + mBorderThickness / 2, mBorderOutsideColor);        } else if (mBorderInsideColor != defaultColor && mBorderOutsideColor == defaultColor) {// 定义画一个边框            radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - mBorderThickness;            drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderInsideColor);        } else if (mBorderInsideColor == defaultColor && mBorderOutsideColor != defaultColor) {// 定义画一个边框            radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - mBorderThickness;            drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderOutsideColor);        } else {// 没有边框            radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2;        }        Bitmap roundBitmap = getCroppedRoundBitmap(bitmap, radius);        canvas.drawBitmap(roundBitmap, defaultWidth / 2 - radius, defaultHeight / 2 - radius, null);    }    /**     * 获取裁剪后的圆形图片     * @param bmp     * @param radius  半径     * @return     */    public Bitmap getCroppedRoundBitmap(Bitmap bmp, int radius) {        Bitmap scaledSrcBmp;        int diameter = radius * 2;        // 为了防止宽高不相等，造成圆形图片变形，因此截取长方形中处于中间位置最大的正方形图片        int bmpWidth = bmp.getWidth();        int bmpHeight = bmp.getHeight();        int squareWidth = 0, squareHeight = 0;        int x = 0, y = 0;        Bitmap squareBitmap;        if (bmpHeight > bmpWidth) {// 高大于宽            squareWidth = squareHeight = bmpWidth;            x = 0;            y = (bmpHeight - bmpWidth) / 2;            // 截取正方形图片            squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth, squareHeight);        } else if (bmpHeight < bmpWidth) {// 宽大于高            squareWidth = squareHeight = bmpHeight;            x = (bmpWidth - bmpHeight) / 2;            y = 0;            squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth,squareHeight);        } else {            squareBitmap = bmp;        }        if (squareBitmap.getWidth() != diameter || squareBitmap.getHeight() != diameter) {            scaledSrcBmp = Bitmap.createScaledBitmap(squareBitmap, diameter,diameter, true);        } else {            scaledSrcBmp = squareBitmap;        }        Bitmap output = Bitmap.createBitmap(scaledSrcBmp.getWidth(),                scaledSrcBmp.getHeight(),                Bitmap.Config.ARGB_8888);        Canvas canvas = new Canvas(output);        Paint paint = new Paint();        Rect rect = new Rect(0, 0, scaledSrcBmp.getWidth(),scaledSrcBmp.getHeight());        paint.setAntiAlias(true);        paint.setFilterBitmap(true);        paint.setDither(true);        canvas.drawARGB(0, 0, 0, 0);        canvas.drawCircle(scaledSrcBmp.getWidth() / 2,                scaledSrcBmp.getHeight() / 2,                scaledSrcBmp.getWidth() / 2,                paint);        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));        canvas.drawBitmap(scaledSrcBmp, rect, rect, paint);        bmp = null;        squareBitmap = null;        scaledSrcBmp = null;        return output;    }    /**     * 边缘画圆     */    private void drawCircleBorder(Canvas canvas, int radius, int color) {        Paint paint = new Paint();        /* 去锯齿 */        paint.setAntiAlias(true);        paint.setFilterBitmap(true);        paint.setDither(true);        paint.setColor(color);        /* 设置paint的　style　为STROKE：空心 */        paint.setStyle(Paint.Style.STROKE);        /* 设置paint的外框宽度 */        paint.setStrokeWidth(mBorderThickness);        canvas.drawCircle(defaultWidth / 2, defaultHeight / 2, radius, paint);    }}

2、定义自己的属性配置文件：attr.xml

<?xml version="1.0" encoding="utf-8"?> <resources>     <declare-styleable name="roundedimageview">         <attr name="border_thickness" format="dimension" />         <attr name="border_inside_color" format="color" />         <attr name="border_outside_color" format="color"></attr>     </declare-styleable> </resources>

3、在xml配置中使用控件：activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     xmlns:imagecontrol="http://schemas.android.com/apk/res-auto"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="horizontal"     >        <!-- 没有指定圆形ImageView属性时，默认没有外边圆颜色 -->     <!-- 需要将图片资源自定为src ，或在程序中setImageResource(res) 不能设置background为图片，这样不能达到圆形效果-->     <com.dxd.roundimageview.RoundImageView          android:layout_width="100dp"         android:layout_height="100dp"         android:src="@drawable/img"         /> 
    <!-- border_outside_color 外部圆圈的颜色 -->     <!-- border_inside_color 内部部圆圈的颜色 -->     <!-- border_thickness 外圆和内圆的宽度 --> 
    <com.dxd.roundimageview.RoundImageView          android:layout_width="100dp"         android:layout_height="100dp"         android:src="@drawable/img"         imagecontrol:border_inside_color="#bc0978"         imagecontrol:border_outside_color="#ba3456"         imagecontrol:border_thickness="1dp"         /> </LinearLayout>

4、运行结果

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