下面是最简单的方法之一，使用以下代码:

依赖关系

dependencies {
    ...
    compile 'de.hdodenhof:circleimageview:2.1.0'      // use this or use the latest compile version. In case u get bug.
}

XML代码

<de.hdodenhof.circleimageview.CircleImageView
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/profile_image"
    android:layout_width="96dp"             //  here u can adjust the width 
    android:layout_height="96dp"            //  here u can adjust the height 
    android:src="@drawable/profile"         //  here u can change the image 
    app:civ_border_width="2dp"              //  here u can adjust the border of the circle.  
    app:civ_border_color="#FF000000"/>      //  here u can adjust the border color

截图:

来源:Circular ImageView GitHub Repository

创建一个CustomImageview，然后简单地覆盖它的onDraw()方法如下:

@Override
protected void onDraw(Canvas canvas) {

    float radius = this.getHeight()/2;
    Path path = new Path();
    RectF rect = new RectF(0, 0, this.getWidth(), this.getHeight());
    path.addRoundRect(rect, radius, radius, Path.Direction.CW);
    canvas.clipPath(path);
    super.onDraw(canvas);

}

如果你想要的代码自定义小部件以及:-

CircularImageView.java

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Path;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

import androidx.annotation.Nullable;

public class CircularImageView extends ImageView {

    private Drawable image;

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

        init(null, 0);
    }

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

        init(attrs, 0);
    }

    public CircularImageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        init(attrs, defStyleAttr);
    }

    @Override
    protected void onDraw(Canvas canvas) {

        float radius = this.getHeight()/2;
        Path path = new Path();
        RectF rect = new RectF(0, 0, this.getWidth(), this.getHeight());
        path.addRoundRect(rect, radius, radius, Path.Direction.CW);
        canvas.clipPath(path);
        super.onDraw(canvas);

    }

    private void init(AttributeSet attrs, int defStyle) {
        TypedArray a = Utils.CONTEXT.getTheme().obtainStyledAttributes(attrs, R.styleable.CircularImageView, 0, 0);
        try {
            image = a.getDrawable(R.styleable.CircularImageView_src);
        } finally {
            a.recycle();
        }

        this.setImageDrawable(image);
    }
}

此外，在res/attrs.xml中添加以下代码来创建所需的属性

<declare-styleable name="CircularImageView">
        <attr name="src" format="reference" />
</declare-styleable>

在glide库和RoundedBitmapDrawableFactory类的帮助下，很容易实现。您可能需要创建圆形占位符映像。

滑翔V4:

Glide.with(context).load(url).apply(RequestOptions.circleCropTransform()).into(imageView);

滑翔V3:

    Glide.with(context)
        .load(imgUrl)
        .asBitmap()
        .placeholder(R.drawable.placeholder)
        .error(R.drawable.placeholder)
        .into(new BitmapImageViewTarget(imgProfilePicture) {
            @Override
            protected void setResource(Bitmap resource) {
                RoundedBitmapDrawable drawable = RoundedBitmapDrawableFactory.create(context.getResources(),
                        Bitmap.createScaledBitmap(resource, 50, 50, false));
                drawable.setCircular(true);
                imgProfilePicture.setImageDrawable(drawable);
            }
        });

对于Picasso RoundedTransformation，这是一个非常好的解决方案，提供了一个额外的选择，在顶部或底部边缘的图像。

我希望这对你有所帮助。

1） 可塑性图像视图

<com.google.android.material.imageview.ShapeableImageView
        android:layout_width="250dp"
        android:layout_height="250dp"
        android:padding="5dp"
        app:strokeWidth="10dp"
        app:strokeColor="@android:color/darker_gray"
        app:shapeAppearanceOverlay="@style/circleImageView"
        android:src="@drawable/profile"
        android:layout_margin="10dp"/>


 Style add here: res/values/styles.xml 
<style name="circleImageView" parent="">
    <item name="cornerFamily">rounded</item>
    <item name="cornerSize">50%</item>
  </style>

完整的描述请查看这里:来源在这里。

2） 圆图像视图

 <de.hdodenhof.circleimageview.CircleImageView
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/profile_image"
    android:layout_width="96dp"
    android:layout_height="96dp"
    android:src="@drawable/profile"
    app:civ_border_width="2dp"
    app:civ_border_color="#FF000000"/>

别忘了实现:Gradle Scripts > build。gradle (Module: app) >依赖项

     implementation 'de.hdodenhof:circleimageview:3.1.0'   
        

完整的描述请查看这里:来源在这里。

3） 循环图像视图

<com.mikhaellopez.circularimageview.CircularImageView
    android:layout_width="250dp"
    android:layout_height="250dp"
    android:src="@drawable/image"
    app:civ_border_color="#3f51b5"
    app:civ_border_width="4dp"
    app:civ_shadow="true"
    app:civ_shadow_radius="10"
    app:civ_shadow_color="#3f51b5"/>

别忘了实现:Gradle Scripts > build。gradle (Module: app) >依赖项

     implementation 'com.mikhaellopez:circularimageview:4.3.1'   
        

完整的描述请查看这里:来源在这里。

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"/>

@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>