如何在圆形imageView android上添加阴影和边框？

Question

我用这个问题创建了一个CircularImageView：Create circular image view in android

在GitHub

上下载项目

1）这是CircularImageView类：

public class CircularImageView extends ImageView {
    public CircularImageView(Context context) {
        super(context);
    }

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

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

    @Override
    protected void onDraw(Canvas canvas) {
        Drawable drawable = getDrawable();
        if (drawable == null) {
            return;
        }

        if (getWidth() == 0 || getHeight() == 0) {
            return; 
        }
        Bitmap b =  ((BitmapDrawable)drawable).getBitmap() ;
        Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);      

        Bitmap roundBitmap =  getCroppedBitmap(bitmap, getWidth());
        canvas.drawBitmap(roundBitmap, 0, 0, null);
    }

    public static Bitmap getCroppedBitmap(Bitmap bmp, int radius) {
        Bitmap sbmp;
        if(bmp.getWidth() != radius || bmp.getHeight() != radius)
            sbmp = Bitmap.createScaledBitmap(bmp, radius, radius, false);
        else
            sbmp = bmp;

        Bitmap output = Bitmap.createBitmap(sbmp.getWidth(), sbmp.getHeight(), Bitmap.Config.ARGB_8888);
        final Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight());

        Paint paint = new Paint();
        paint.setAntiAlias(true);
        paint.setFilterBitmap(true);
        paint.setDither(true);      
        paint.setColor(Color.parseColor("#BAB399"));

        Canvas c = new Canvas(output);        
        c.drawARGB(0, 0, 0, 0);
        c.drawCircle(sbmp.getWidth() / 2+0.7f, sbmp.getHeight() / 2+0.7f, sbmp.getWidth() / 2+0.1f, paint);
        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
        c.drawBitmap(sbmp, rect, rect, paint);

        return output;
    }
}

2）我在我的布局中使用如下：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#cccccc"
    android:gravity="center"
    android:orientation="vertical"
    android:padding="10dp" >

    <com.mikhaellopez.circularimageview.CircularImageView
        android:id="@+id/imageViewCircular"
        android:layout_width="@dimen/image_view_size"
        android:layout_height="@dimen/image_view_size"
        android:layout_gravity="center"
        android:background="@drawable/border"
        android:src="@drawable/image" />

</LinearLayout>

3）图片中的当前结果：

如何更改此代码，使我的imageView周围有阴影和圆形边框？

Objectif结果：

---

编辑2015年10月15日：

您可以使用 gradle依赖 gradle依赖，使用 GitHub库 CircularImageView 所有修复：

compile 'com.mikhaellopez:circularimageview:2.0.1'

Answer 1

我修改了CircularImageView found here以达到你想要的效果。

要在边框周围创建阴影，我只使用这两行：

this.setLayerType(LAYER_TYPE_SOFTWARE, paintBorder);
paintBorder.setShadowLayer(4.0f, 0.0f, 2.0f, Color.BLACK);

由于HoneyComb及更高版本的硬件加速，您需要setLayerType。当我尝试它时它没有它。

以下是完整代码：

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Shader;
import android.graphics.drawable.BitmapDrawable;
import android.util.AttributeSet;
import android.widget.ImageView;

public class CircularImageView extends ImageView
{
    private int borderWidth = 4;
    private int viewWidth;
    private int viewHeight;
    private Bitmap image;
    private Paint paint;
    private Paint paintBorder;
    private BitmapShader shader;

    public CircularImageView(Context context)
    {
        super(context);
        setup();
    }

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

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

    private void setup()
    {
        // init paint
        paint = new Paint();
        paint.setAntiAlias(true);

        paintBorder = new Paint();
        setBorderColor(Color.WHITE);
        paintBorder.setAntiAlias(true);
        this.setLayerType(LAYER_TYPE_SOFTWARE, paintBorder);
        paintBorder.setShadowLayer(4.0f, 0.0f, 2.0f, Color.BLACK);
    }

    public void setBorderWidth(int borderWidth)
    {
        this.borderWidth = borderWidth;
        this.invalidate();
    }

    public void setBorderColor(int borderColor)
    {
        if (paintBorder != null)
            paintBorder.setColor(borderColor);

        this.invalidate();
    }

    private void loadBitmap()
    {
        BitmapDrawable bitmapDrawable = (BitmapDrawable) this.getDrawable();

        if (bitmapDrawable != null)
            image = bitmapDrawable.getBitmap();
    }

    @SuppressLint("DrawAllocation")
    @Override
    public void onDraw(Canvas canvas)
    {
        // load the bitmap
        loadBitmap();

        // init shader
        if (image != null)
        {
            shader = new BitmapShader(Bitmap.createScaledBitmap(image, canvas.getWidth(), canvas.getHeight(), false), Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
            paint.setShader(shader);
            int circleCenter = viewWidth / 2;

            // circleCenter is the x or y of the view's center
            // radius is the radius in pixels of the cirle to be drawn
            // paint contains the shader that will texture the shape
            canvas.drawCircle(circleCenter + borderWidth, circleCenter + borderWidth, circleCenter + borderWidth - 4.0f, paintBorder);
            canvas.drawCircle(circleCenter + borderWidth, circleCenter + borderWidth, circleCenter - 4.0f, paint);
        }
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
    {
        int width = measureWidth(widthMeasureSpec);
        int height = measureHeight(heightMeasureSpec, widthMeasureSpec);

        viewWidth = width - (borderWidth * 2);
        viewHeight = height - (borderWidth * 2);

        setMeasuredDimension(width, height);
    }

    private int measureWidth(int measureSpec)
    {
        int result = 0;
        int specMode = MeasureSpec.getMode(measureSpec);
        int specSize = MeasureSpec.getSize(measureSpec);

        if (specMode == MeasureSpec.EXACTLY)
        {
            // We were told how big to be
            result = specSize;
        }
        else
        {
            // Measure the text
            result = viewWidth;
        }

        return result;
    }

    private int measureHeight(int measureSpecHeight, int measureSpecWidth)
    {
        int result = 0;
        int specMode = MeasureSpec.getMode(measureSpecHeight);
        int specSize = MeasureSpec.getSize(measureSpecHeight);

        if (specMode == MeasureSpec.EXACTLY)
        {
            // We were told how big to be
            result = specSize;
        }
        else
        {
            // Measure the text (beware: ascent is a negative number)
            result = viewHeight;
        }

        return (result + 2);
    }
}

我希望它有所帮助！

修改

我分叉你的CircularImageView并添加了对选择器叠加的支持。我也大大提高了绘图性能......

https://github.com/Pkmmte/CircularImageView

Answer 2

要通过将ImageView设为圆圈来添加边框，我做了一件简单的事情，我用这个类将图像设为圆圈

package com.fidenz.fexceller.fexceller;

/**
 * Created by Chathu Hettiarachchi on 5/18/2015.
 */
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.drawable.Drawable;

public class RoundedImg extends Drawable {
    private final Bitmap mBitmap;
    private final Paint mPaint;
    private final RectF mRectF;
    private final int mBitmapWidth;
    private final int mBitmapHeight;

    public RoundedImg(Bitmap bitmap) {
        mBitmap = bitmap;
        mRectF = new RectF();
        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        mPaint.setDither(true);
        final BitmapShader shader = new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
        mPaint.setShader(shader);

        mBitmapWidth = mBitmap.getWidth();
        mBitmapHeight = mBitmap.getHeight();
    }

    @Override
    public void draw(Canvas canvas) {
        canvas.drawOval(mRectF, mPaint);
    }

    @Override
    protected void onBoundsChange(Rect bounds) {
        super.onBoundsChange(bounds);
        mRectF.set(bounds);
    }

    @Override
    public void setAlpha(int alpha) {
        if (mPaint.getAlpha() != alpha) {
            mPaint.setAlpha(alpha);
            invalidateSelf();
        }
    }

    @Override
    public void setColorFilter(ColorFilter cf) {
        mPaint.setColorFilter(cf);
    }

    @Override
    public int getOpacity() {
        return PixelFormat.TRANSLUCENT;
    }

    @Override
    public int getIntrinsicWidth() {
        return mBitmapWidth;
    }

    @Override
    public int getIntrinsicHeight() {
        return mBitmapHeight;
    }

    public void setAntiAlias(boolean aa) {
        mPaint.setAntiAlias(aa);
        invalidateSelf();
    }

    @Override
    public void setFilterBitmap(boolean filter) {
        mPaint.setFilterBitmap(filter);
        invalidateSelf();
    }

    @Override
    public void setDither(boolean dither) {
        mPaint.setDither(dither);
        invalidateSelf();
    }

    public Bitmap getBitmap() {
        return mBitmap;
    }

}

并在onCreate上使用此功能，我已调用图像进行设置，

profilePic = (ImageView)findViewById(R.id.img_home_profile_pic);

Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.no_image);
roundedImage = new RoundedImg(bm);
profilePic.setImageDrawable(roundedImage);

添加边框我创建了一个这样的圆形XML，

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval" >
    <gradient android:startColor="@color/ring_color" android:endColor="@color/ring_color"
        android:angle="270"/>
</shape>

然后使用布局我在其中添加了RelativeLayout ImageView，使用填充和背景绘制wrap_content我设置RelativeLayout就像这样

<RelativeLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/lay_rel_img"
    android:layout_gravity="center"
    android:padding="5dp"
    android:background="@drawable/circle">

    <ImageView
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:layout_gravity="center"
        android:id="@+id/img_home_profile_pic"
        android:src="@drawable/no_image"
        android:layout_centerHorizontal="true"/>

</RelativeLayout>

现在它显示这样，我不知道添加阴影，对不起也是

Answer 3

1. 加 canvas.drawCircle(getWidth() / 2, getWidth() / 2, getWidth() / 2, paint); 之前 canvas.drawBitmap(roundBitmap, 0, 0, null);
2. 更改 c.drawCircle(sbmp.getWidth() / 2, sbmp.getHeight() / 2, sbmp.getWidth() / 2, paint); 至 c.drawCircle(sbmp.getWidth() / 2, sbmp.getHeight() / 2, sbmp.getWidth() / 2 - "the border with you prefer", paint);

希望它有所帮助。

也许是更好的解决方案here。

Answer 4

创建自定义drawable，并使用它来定义ImageView的背景属性。您可以使用LayeredDrawable为组件创建任意数量的组件。

查看此答案，创建一个自定义矩形（但与Oval \ Circle完全相同）：How to create Google + cards UI in a list view?

Answer 5

我找到了一个完全符合你的意愿的图书馆，对我来说很好。 看看这个。 https://android-arsenal.com/details/1/932

Answer 6

在绘制实际图像之前，只需使用具有更多宽度和高度的drawCircle（）方法。根据您的意愿增加新方法调用的宽度和高度，并在绘制上设置您想要的另一种颜色

Answer 7

此类是具有阴影，笔触，饱和度的自定义圆形图像视图，使用此自定义圆形ImageView，您可以使用“半径”将图像设置为圆形。圆形阴影ImageS的人不需要Github这个类就足够了。

将CircularImageView添加到您的布局

// Bitmap myimage = BitmapFactory.decodeResource（getResources（），R.drawable.pic）;     CircularImageView c = new CircularImageView（this，screen width，screen height，Bitmap myimage）;     yourLayout.addView（C）; **

public class CircularImageView extends android.support.v7.widget.AppCompatImageView  
{
    private final Context context;
    private final int width, height;
    private final Paint paint;
    private final Paint paintBorder,imagePaint;
    private final Bitmap bitmap2;
    private final Paint paint3;
    private Bitmap bitmap;
    private BitmapShader shader;
    private float radius = 4.0f;
    float x = 0.0f;
    float y = 8.0f;
    private float stroke;
    private float strokeWidth = 0.0f;
    private Bitmap bitmap3;
    private int corner_radius=50;


    public CircularImageView(Context context, int width, int height, Bitmap bitmap)     {
        super(context);
        this.context = context;
        this.width = width;
        this.height = height;

   //here "bitmap" is the square shape(width* width) scaled bitmap ..

        this.bitmap = bitmap;


        paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        paint.setAntiAlias(true);
        paint.setFilterBitmap(true);
        paint.setDither(true);


        paint3=new Paint();
        paint3.setStyle(Paint.Style.STROKE);
        paint3.setColor(Color.WHITE);
        paint3.setAntiAlias(true);

        paintBorder = new Paint();
        imagePaint= new Paint();

        paintBorder.setColor(Color.WHITE);
        paintBorder.setAntiAlias(true);
        this.setLayerType(LAYER_TYPE_SOFTWARE, paintBorder);


        this.bitmap2 = Bitmap.createScaledBitmap(bitmap, (bitmap.getWidth() - 40), (bitmap.getHeight() - 40), true);


        imagePaint.setAntiAlias(true);




        invalidate();
    }

    @Override
    protected void onDraw(Canvas canvas) 
    {
        super.onDraw(canvas);
        Shader b;
         if (bitmap3 != null)
            b = new BitmapShader(bitmap3, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
         else
            b = new BitmapShader(bitmap2, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
        imagePaint.setShader(b);
        canvas.drawBitmap(maskedBitmap(), 20, 20, null);
    }

    private Bitmap maskedBitmap()
    {
        Bitmap l1 = Bitmap.createBitmap(width,width, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(l1);
        paintBorder.setShadowLayer(radius, x, y, Color.parseColor("#454645"));
        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
        final RectF rect = new RectF();
        rect.set(20, 20, bitmap2.getWidth(), bitmap2.getHeight());

        canvas.drawRoundRect(rect, corner_radius, corner_radius, paintBorder);

        canvas.drawRoundRect(rect, corner_radius, corner_radius, imagePaint);

        if (strokeWidth!=0.0f)
        {
            paint3.setStrokeWidth(strokeWidth);
            canvas.drawRoundRect(rect, corner_radius, corner_radius, paint3);
        }

         paint.setXfermode(null);
        return l1;
    }




     // use seekbar here, here you have to pass  "0 -- 250"  here corner radius will change 

    public void setCornerRadius(int corner_radius)
    {
        this.corner_radius = corner_radius;
        invalidate();
    }



    -------->use seekbar here, here you have to pass  "0 -- 10.0f"  here shadow radius will change 

    public void setShadow(float radius)
    {
        this.radius = radius;
        invalidate();
    }

   // use seekbar here, here you have to pass  "0 -- 10.0f"  here stroke size  will change 

    public void setStroke(float stroke)
    {
        this.strokeWidth = stroke;
        invalidate();
    }

    private Bitmap updateSat(Bitmap src, float settingSat)
    {

        int w = src.getWidth();
        int h = src.getHeight();

        Bitmap bitmapResult =
                Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
        Canvas canvasResult = new Canvas(bitmapResult);
        Paint paint = new Paint();
        ColorMatrix colorMatrix = new ColorMatrix();
        colorMatrix.setSaturation(settingSat);
        ColorMatrixColorFilter filter = new ColorMatrixColorFilter(colorMatrix);
        paint.setColorFilter(filter);
        canvasResult.drawBitmap(src, 0, 0, paint);

        return bitmapResult;
    }




  // use seekbar here, here you have to pass  "0 -- 2.0f"  here saturation  will change 

    public void setSaturation(float sat)
    {
        System.out.println("qqqqqqqqqq            "+sat);
        bitmap3=updateSat(bitmap2, sat);

        invalidate();
    } 


}






        // Seekbar to change radius

                  radius_seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
                        @Override
                        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser)
                        {
                            text_radius.setText(""+progress);
                            circularImageView.setCornerRadius(progress);
                        }

                        @Override
                        public void onStartTrackingTouch(SeekBar seekBar) {

                        }

                        @Override
                        public void onStopTrackingTouch(SeekBar seekBar) {

                        }
                    });


     // Seekbar to change shadow

                    shadow_seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
                        @Override
                        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser)
                        {
                            float f= 4+progress/10.0f;
                            text_shadow.setText(""+progress);
                            circularImageView.setShadow(f);
                        }

                        @Override
                        public void onStartTrackingTouch(SeekBar seekBar) {

                        }

                        @Override
                        public void onStopTrackingTouch(SeekBar seekBar) {

                        }
                    });


           // Seekbar to change saturation

                    saturation_seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
                        @Override
                        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser)
                        {
                            int progressSat = saturation_seekbar.getProgress();
                            float sat = (float) ((progressSat*4 / 100.0f)-1.0f);
                            circularImageView.setSaturation(sat);

                            text_saturation.setText(""+progressSat);
                        }

                        @Override
                        public void onStartTrackingTouch(SeekBar seekBar) {

                        }

                        @Override
                        public void onStopTrackingTouch(SeekBar seekBar) {

                        }
                    });


    // Seekbar to change stroke

                    stroke_seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
                        @Override
                        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser)
                        {
                            if (progress==0)
                            {
                                float f=(progress*10.0f/100.0f);
                                circularImageView.setStroke(f);
                            }
                            else
                            {
                                float f=(progress*10.0f/100.0f);
                                circularImageView.setStroke(f);
                            }

                            text_stroke.setText(""+progress);
                        }

                        @Override
                        public void onStartTrackingTouch(SeekBar seekBar) {

                        }

                        @Override
                        public void onStopTrackingTouch(SeekBar seekBar) {

                        }
                    });




             //radius seekbar in xml file

             <SeekBar
                android:layout_width="match_parent"
                android:layout_gravity="center" 
                android:progress="50"
                android:max="250"
                android:id="@+id/radius_seekbar"
                android:layout_height="wrap_content" />





          //saturation seekbar in xml file

             <SeekBar
                android:layout_width="match_parent"
                android:layout_gravity="center" 
                android:progress="50"
                android:max="100"
                android:id="@+id/saturation_seekbar"
                android:layout_height="wrap_content" />





    //shadow seekbar in xml file

             <SeekBar
                android:layout_width="match_parent"
                android:layout_gravity="center" 
                android:progress="0"
                android:max="100"
                android:id="@+id/shadow_seekbar"
                android:layout_height="wrap_content" />




         //stroke seekbar in xml file

             <SeekBar
                android:layout_width="match_parent"
                android:layout_gravity="center" 
                android:progress="0"
                android:max="100"
                android:id="@+id/stroke _seekbar"
                android:layout_height="wrap_content" />