我想让任何图像从我的ImageView是圆形的边界。

我搜索了一下,但没有找到任何有用的信息(我尝试的任何方法都不管用)。

如何通过XML实现这一点: 创建一个ImageView与某些src,并使它与边界圆形?


当前回答

使用材质组件库只需使用ShapeableImageView。 Somethig:

<com.google.android.material.imageview.ShapeableImageView
    app:shapeAppearanceOverlay="@style/roundedImageViewRounded"
    app:strokeColor="@color/....."
    app:strokeWidth="1dp"
    ...
    />

:

  <style name="roundedImageViewRounded">
    <item name="cornerFamily">rounded</item>
    <item name="cornerSize">50%</item>
  </style>

注意:它至少需要1.2.0版本。


使用jetpack合成,你可以使用CircleShape应用剪辑修饰器:

Image(
    painter = painterResource(R.drawable.xxxx),
    contentDescription = "xxxx",
    contentScale = ContentScale.Crop,
    modifier = Modifier
        .size(100.dp)
        .clip(CircleShape)
        .border(2.dp, Color.Blue, CircleShape)
)

其他回答

这个类是自定义圆形Imageview,有阴影,描边,饱和度,使用这个自定义圆形Imageview,你可以让你的图像在半径的圆形形状。圆形阴影ImageView不需要Github这个类就足够了。

添加CircularImageView到你的布局

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" />

我用shape = "oval"代替下面的"ring"。这对我很有效。为了保持图像在边界内,我使用<padding>并在<ImageView>中设置<adjustViewBounds>为true。我尝试过大小在50 x 50 px到200x200 px之间的图像。

@Jyotman Singh,答案非常好(对于坚实的背景),所以我想通过分享可以根据你的需要重新着色的矢量绘图来增强它,而且这很方便,因为矢量整体形状是可伸缩的。

这是矩形-圆形状(@drawable/shape_round_profile_pic):

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:viewportWidth="284"
    android:viewportHeight="284"
    android:width="284dp"
    android:height="284dp">
    <path
        android:pathData="M0 142L0 0l142 0 142 0 0 142 0 142 -142 0 -142 0zm165 137.34231c26.06742 -4.1212 52.67405 -17.543 72.66855 -36.65787 11.82805 -11.30768 20.55487 -22.85153 27.7633 -36.72531C290.23789 158.21592 285.62874 101.14121 253.48951 58.078079 217.58149 9.9651706 154.68849 -10.125717 98.348685 8.5190299 48.695824 24.95084 12.527764 67.047123 3.437787 118.98655 1.4806194 130.16966 1.511302 152.96723 3.4990422 164.5 12.168375 214.79902 47.646316 256.70775 96 273.76783c21.72002 7.66322 44.26673 9.48476 69 5.57448z"
        android:fillColor="#ffffff" /> // you can change frame color
</vector>

用法是一样的:

<FrameLayout
        android:layout_width="70dp"
        android:layout_height="70dp">

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/YOUR_PICTURE" />

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/shape_round_profile_pic"/>

    </FrameLayout>

另一种不使用任何库的方法是使用ImageFilterView,并设置视图的圆百分比将使圆

app: roundPercent =“1”

  <androidx.constraintlayout.utils.widget.ImageFilterView
        android:id="@+id/ivProfile"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:src="@drawable/custom_button_1"
        app:roundPercent="1"
        android:scaleType="fitXY"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintBottom_toTopOf="@+id/etName"/>

另一个想法是使用ImageView的clipToOutline属性。

这是一个布局示例:

<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- Simple view to draw borders for an image,
         borders will be rounded because of the oval-shaped background. -->
    <View
        android:id="@+id/v_border"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:background="@drawable/shape_border"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <!-- Image itself: fits the border view, 
         a margin serves as a border width;
         the key point here - is a background shape which will clip the view to its forms. -->
    <ImageView
        android:id="@+id/iv_image"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="4dp"
        android:background="@drawable/shape_oval"
        android:src="@mipmap/ic_launcher"
        app:layout_constraintBottom_toBottomOf="@+id/v_border"
        app:layout_constraintEnd_toEndOf="@+id/v_border"
        app:layout_constraintStart_toStartOf="@+id/v_border"
        app:layout_constraintTop_toTopOf="@+id/v_border" />

</androidx.constraintlayout.widget.ConstraintLayout>

这是我们的shape_border可绘制对象:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval">
    <solid android:color="#FF00FF" />
</shape>

和shape_oval drawable:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval" />

你在代码中唯一要做的就是启用clipToOutline属性:

binding.ivImage.clipToOutline = true

当然,您甚至可以使用一些BindingAdapter来避免这一行代码。