其他的解决方法对我都不起作用。我发现它们都有明显的缺点:

使用滑动转换的解决方案不能使用占位符 使用圆形图像视图的解决方案不适用于动画(即交叉渐隐) 使用父类的通用方法来剪辑子类(即这里接受的答案)的解决方案不能很好地与glide一起工作

有趣的是，在摸索了一番之后，我发现了Fresco图书馆关于圆角和圆的页面，其中他们列出了基本相同的限制，并以声明结尾:

在Android上没有真正好的解决方案，人们必须在上述的权衡中做出选择

令人难以置信的是，在这个时候我们仍然没有一个真正的解决方案。基于上面的链接，我有一个替代的解决方案。这种方法的缺点是它假设你的背景是纯色的(角落不是真正透明的)。你可以这样使用它:

<RoundedCornerLayout ...>
    <ImageView ...>
</RoundedCornerLayout>

要点在这里，完整代码在这里:

public class RoundedCornerLayout extends RelativeLayout {
    private Bitmap maskBitmap;
    private Paint paint;
    private float cornerRadius;

    public RoundedCornerLayout(Context context) {
        super(context);
        init(context, null, 0);
    }

    public RoundedCornerLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs, 0);
    }

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

    private void init(Context context, AttributeSet attrs, int defStyle) {
        paint = new Paint(Paint.ANTI_ALIAS_FLAG);

        setWillNotDraw(false);
    }

    @Override
    public void draw(Canvas canvas) {
        super.draw(canvas);

        if (maskBitmap == null) {
            // This corner radius assumes the image width == height and you want it to be circular
            // Otherwise, customize the radius as needed
            cornerRadius = canvas.getWidth() / 2;
            maskBitmap = createMask(canvas.getWidth(), canvas.getHeight());
        }

        canvas.drawBitmap(maskBitmap, 0f, 0f, paint);
    }

    private Bitmap createMask(int width, int height) {
        Bitmap mask = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(mask);

        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        paint.setColor(Color.WHITE); // TODO set your background color as needed

        canvas.drawRect(0, 0, width, height, paint);

        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
        canvas.drawRoundRect(new RectF(0, 0, width, height), cornerRadius, cornerRadius, paint);

        return mask;
    }
}

使用这个转换，它会工作得很好。

public class CircleTransform extends BitmapTransformation {
public CircleTransform(Context context) {
    super(context);
}

@Override
protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
    return circleCrop(pool, toTransform);
}

private static Bitmap circleCrop(BitmapPool pool, Bitmap source) {
    if (source == null) return null;

    int borderColor = ColorUtils.setAlphaComponent(Color.WHITE, 0xFF);
    int borderRadius = 3;

    int size = Math.min(source.getWidth(), source.getHeight());
    int x = (source.getWidth() - size) / 2;
    int y = (source.getHeight() - size) / 2;

    // TODO this could be acquired from the pool too
    Bitmap squared = Bitmap.createBitmap(source, x, y, size, size);
    if (squared != source) {
        source.recycle();
    }

    Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888);
    if (result == null) {
        result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
    }

    Canvas canvas = new Canvas(result);
    Paint paint = new Paint();
    paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
    paint.setAntiAlias(true);
    float r = size / 2f;
    canvas.drawCircle(r, r, r, paint);

    // Prepare the background
    Paint paintBg = new Paint();
    paintBg.setColor(borderColor);
    paintBg.setAntiAlias(true);

    // Draw the background circle
    canvas.drawCircle(r, r, r, paintBg);

    // Draw the image smaller than the background so a little border will be seen
    canvas.drawCircle(r, r, r - borderRadius, paint);

    squared.recycle();

    return result;
}

@Override
public String getId() {
    return getClass().getName();
}} 

                Glide.with(MainActivity.this)
                        .load(personPhoto)
                        .transition(withCrossFade(500))
                        .apply(RequestOptions.circleCropTransform())
                        .thumbnail(0.5f)
                        .into(imageView);

            

implementation 'com.github.bumptech.glide:glide:4.8.0'
annotationProcessor 'com.github.bumptech.glide:compiler:4.8.0'


RequestOptions options=new RequestOptions();
        options.centerCrop().placeholder(getResources().getDrawable(R.drawable.user_placeholder));
        Glide.with(this)
                .load(preferenceSingleTon.getImage())
                .apply(options)
                .into(ProfileImage);

我发现了一个简单的解决方案，为imageview添加边界，其中的颜色想要设置或添加渐变图像。

步骤:

取一帧布局并添加两张图像。您可以根据您的要求设置大小。对于imgPlaceHolder，您需要一个想要设置的白色图像或颜色。

        <ImageView
            android:id="@+id/imgPlaceHolder"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:src="@drawable/white_bg"/>

        <ImageView
            android:id="@+id/imgPic"
            android:layout_width="190dp"
            android:layout_height="190dp"
            android:layout_gravity="center"
            android:src="@drawable/image01"/>
    </FrameLayout>

After placing this code on xml file , put below line in java file. Glide.with(this).load(R.drawable.image01).asBitmap().centerCrop().into(new BitmapImageViewTarget(imgPic) { @Override protected void setResource(Bitmap resource) { RoundedBitmapDrawable circularBitmapDrawable = RoundedBitmapDrawableFactory.create(getResources(), resource); circularBitmapDrawable.setCircular(true); imageView.setImageDrawable(circularBitmapDrawable); } }); Glide.with(this).load(R.drawable.white_bg).asBitmap().centerCrop().into(new BitmapImageViewTarget(imgPlaceHolder) { @Override protected void setResource(Bitmap resource) { RoundedBitmapDrawable circularBitmapDrawable = RoundedBitmapDrawableFactory.create(getResources(), resource); circularBitmapDrawable.setCircular(true); imgTemp2.setImageDrawable(circularBitmapDrawable); } });

这将使imageview的边界简单，没有任何额外的填充和边缘。

注意:白色图像是强制性的边界，否则它将不起作用。

快乐编码:)

您也可以使用这个实现，不过值得注意的是，这个实现是基于匕首柄的

提供程序实现

@Module
@Named("circleCrop")
@InstallIn(SingletonComponent::class)
object AppModule {
    @Singleton
    @Provides
    fun provideGlideInstance(
        @ApplicationContext context: Context
    ) = Glide.with(context).setDefaultRequestOptions(
        RequestOptions()
            .placeholder(R.drawable.logo)
            .error(R.drawable.logo)
            .apply(RequestOptions().circleCropTransform())
            .diskCacheStrategy(DiskCacheStrategy.DATA)
    )
}

依赖注入

@Inject
@Named("circleCrop")
 lateinit var glide: RequestManager

加载图片

    glide.load(hotel.image).into(imgItemSearch)