Custom image view which is circle in shape & also extends NetworkImageView (volley) functionality.

CustomCircleCumNetworkImageView.java

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.support.annotation.ColorRes;
import android.support.annotation.DrawableRes;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.widget.ImageView;

import com.android.volley.VolleyError;
import com.android.volley.toolbox.ImageLoader;
import com.truple.customer.R;

/**
 * Created by vikram on 28/4/16.
 */
public class CustomCircleCumNetworkImageView extends ImageView {

    private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP;

    private static final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888;
    private static final int COLORDRAWABLE_DIMENSION = 2;

    private static final int DEFAULT_BORDER_WIDTH = 0;
    private static final int DEFAULT_BORDER_COLOR = R.color.PrimaryForeground;
    private static final boolean DEFAULT_BORDER_OVERLAY = false;

    private final RectF mDrawableRect = new RectF();
    private final RectF mBorderRect = new RectF();

    private final Matrix mShaderMatrix = new Matrix();
    private final Paint mBitmapPaint = new Paint();
    private final Paint mBorderPaint = new Paint();

    private int mBorderColor = DEFAULT_BORDER_COLOR;
    private int mBorderWidth = DEFAULT_BORDER_WIDTH;

    private Bitmap mBitmap;
    private BitmapShader mBitmapShader;
    private int mBitmapWidth;
    private int mBitmapHeight;

    private float mDrawableRadius;
    private float mBorderRadius;

    private ColorFilter mColorFilter;

    private boolean mReady;
    private boolean mSetupPending;
    private boolean mBorderOverlay;

    private String mUrl;
    private int mDefaultImageId;
    private int mErrorImageId;
    private ImageLoader mImageLoader;
    private ImageLoader.ImageContainer mImageContainer;

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

        init();
    }

    public CustomCircleCumNetworkImageView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

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

        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircleImageView, defStyle, 0);

        mBorderWidth = a.getDimensionPixelSize(R.styleable.CircleImageView_border_width, DEFAULT_BORDER_WIDTH);
        mBorderColor = a.getColor(R.styleable.CircleImageView_border_color, DEFAULT_BORDER_COLOR);
        mBorderOverlay = a.getBoolean(R.styleable.CircleImageView_border_overlay, DEFAULT_BORDER_OVERLAY);

        a.recycle();

        init();
    }

    public void setImageUrl(String url, ImageLoader imageLoader) {
        this.mUrl = url;
        this.mImageLoader = imageLoader;
        this.loadImageIfNecessary(false);
    }

    public void setDefaultImageResId(int defaultImage) {
        this.mDefaultImageId = defaultImage;
    }

    public void setErrorImageResId(int errorImage) {
        this.mErrorImageId = errorImage;
    }

    void loadImageIfNecessary(final boolean isInLayoutPass) {
        int width = this.getWidth();
        int height = this.getHeight();
        boolean wrapWidth = false;
        boolean wrapHeight = false;
        if (this.getLayoutParams() != null) {
            wrapWidth = this.getLayoutParams().width == -2;
            wrapHeight = this.getLayoutParams().height == -2;
        }

        boolean isFullyWrapContent = wrapWidth && wrapHeight;
        if (width != 0 || height != 0 || isFullyWrapContent) {
            if (TextUtils.isEmpty(this.mUrl)) {
                if (this.mImageContainer != null) {
                    this.mImageContainer.cancelRequest();
                    this.mImageContainer = null;
                }

                this.setDefaultImageOrNull();
            } else {
                if (this.mImageContainer != null && this.mImageContainer.getRequestUrl() != null) {
                    if (this.mImageContainer.getRequestUrl().equals(this.mUrl)) {
                        return;
                    }

                    this.mImageContainer.cancelRequest();
                    this.setDefaultImageOrNull();
                }

                int maxWidth = wrapWidth ? 0 : width;
                int maxHeight = wrapHeight ? 0 : height;
                ImageLoader.ImageContainer newContainer = this.mImageLoader.get(this.mUrl, new ImageLoader.ImageListener() {
                    public void onErrorResponse(VolleyError error) {
                        if (CustomCircleCumNetworkImageView.this.mErrorImageId != 0) {
                            CustomCircleCumNetworkImageView.this.setImageResource(CustomCircleCumNetworkImageView.this.mErrorImageId);
                        }

                    }

                    public void onResponse(final ImageLoader.ImageContainer response, boolean isImmediate) {
                        if (isImmediate && isInLayoutPass) {
                            CustomCircleCumNetworkImageView.this.post(new Runnable() {
                                public void run() {
                                    onResponse(response, false);
                                }
                            });
                        } else {
                            if (response.getBitmap() != null) {
                                CustomCircleCumNetworkImageView.this.setImageBitmap(response.getBitmap());
                            } else if (CustomCircleCumNetworkImageView.this.mDefaultImageId != 0) {
                                CustomCircleCumNetworkImageView.this.setImageResource(CustomCircleCumNetworkImageView.this.mDefaultImageId);
                            }

                        }
                    }
                }, maxWidth, maxHeight);
                this.mImageContainer = newContainer;
            }
        }
    }

    private void setDefaultImageOrNull() {
        if (this.mDefaultImageId != 0) {
            this.setImageResource(this.mDefaultImageId);
        } else {
            this.setImageBitmap((Bitmap) null);
        }

    }

    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        this.loadImageIfNecessary(true);
    }

    protected void onDetachedFromWindow() {
        if (this.mImageContainer != null) {
            this.mImageContainer.cancelRequest();
            this.setImageBitmap((Bitmap) null);
            this.mImageContainer = null;
        }

        super.onDetachedFromWindow();
    }

    protected void drawableStateChanged() {
        super.drawableStateChanged();
        this.invalidate();
    }

    private void init() {
        super.setScaleType(SCALE_TYPE);
        mReady = true;

        if (mSetupPending) {
            setup();
            mSetupPending = false;
        }
    }

    @Override
    public ScaleType getScaleType() {
        return SCALE_TYPE;
    }

    @Override
    public void setScaleType(ScaleType scaleType) {
        if (scaleType != SCALE_TYPE) {
            throw new IllegalArgumentException(String.format("ScaleType %s not supported", scaleType));
        }
    }

    @Override
    public void setAdjustViewBounds(boolean adjustViewBounds) {
        if (adjustViewBounds) {
            throw new IllegalArgumentException("adjustViewBounds not supported");
        }
    }

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

        canvas.drawCircle(getWidth() / 2, getHeight() / 2, mDrawableRadius, mBitmapPaint);
        if (mBorderWidth != 0) {
            canvas.drawCircle(getWidth() / 2, getHeight() / 2, mBorderRadius, mBorderPaint);
        }
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        setup();
    }

    public int getBorderColor() {
        return mBorderColor;
    }

    public void setBorderColor(int borderColor) {
        if (borderColor == mBorderColor) {
            return;
        }

        mBorderColor = borderColor;
        mBorderPaint.setColor(mBorderColor);
        invalidate();
    }

    public void setBorderColorResource(@ColorRes int borderColorRes) {
        setBorderColor(getContext().getResources().getColor(borderColorRes));
    }

    public int getBorderWidth() {
        return mBorderWidth;
    }

    public void setBorderWidth(int borderWidth) {
        if (borderWidth == mBorderWidth) {
            return;
        }

        mBorderWidth = borderWidth;
        setup();
    }

    public boolean isBorderOverlay() {
        return mBorderOverlay;
    }

    public void setBorderOverlay(boolean borderOverlay) {
        if (borderOverlay == mBorderOverlay) {
            return;
        }

        mBorderOverlay = borderOverlay;
        setup();
    }

    @Override
    public void setImageBitmap(Bitmap bm) {
        super.setImageBitmap(bm);
        mBitmap = bm;
        setup();
    }

    @Override
    public void setImageDrawable(Drawable drawable) {
        super.setImageDrawable(drawable);
        mBitmap = getBitmapFromDrawable(drawable);
        setup();
    }

    @Override
    public void setImageResource(@DrawableRes int resId) {
        super.setImageResource(resId);
        mBitmap = getBitmapFromDrawable(getDrawable());
        setup();
    }

    @Override
    public void setImageURI(Uri uri) {
        super.setImageURI(uri);
        mBitmap = getBitmapFromDrawable(getDrawable());
        setup();
    }

    @Override
    public void setColorFilter(ColorFilter cf) {
        if (cf == mColorFilter) {
            return;
        }

        mColorFilter = cf;
        mBitmapPaint.setColorFilter(mColorFilter);
        invalidate();
    }

    private Bitmap getBitmapFromDrawable(Drawable drawable) {
        if (drawable == null) {
            return null;
        }

        if (drawable instanceof BitmapDrawable) {
            return ((BitmapDrawable) drawable).getBitmap();
        }

        try {
            Bitmap bitmap;

            if (drawable instanceof ColorDrawable) {
                bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION, COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);
            } else {
                bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), BITMAP_CONFIG);
            }

            Canvas canvas = new Canvas(bitmap);
            drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
            drawable.draw(canvas);
            return bitmap;
        } catch (OutOfMemoryError e) {
            return null;
        }
    }

    private void setup() {
        if (!mReady) {
            mSetupPending = true;
            return;
        }

        if (mBitmap == null) {
            return;
        }

        mBitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);

        mBitmapPaint.setAntiAlias(true);
        mBitmapPaint.setShader(mBitmapShader);

        mBorderPaint.setStyle(Paint.Style.STROKE);
        mBorderPaint.setAntiAlias(true);
        mBorderPaint.setColor(mBorderColor);
        mBorderPaint.setStrokeWidth(mBorderWidth);

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

        mBorderRect.set(0, 0, getWidth(), getHeight());
        mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2, (mBorderRect.width() - mBorderWidth) / 2);

        mDrawableRect.set(mBorderRect);
        if (!mBorderOverlay) {
            mDrawableRect.inset(mBorderWidth, mBorderWidth);
        }
        mDrawableRadius = Math.min(mDrawableRect.height() / 2, mDrawableRect.width() / 2);

        updateShaderMatrix();
        invalidate();
    }

    private void updateShaderMatrix() {
        float scale;
        float dx = 0;
        float dy = 0;

        mShaderMatrix.set(null);

        if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width() * mBitmapHeight) {
            scale = mDrawableRect.height() / (float) mBitmapHeight;
            dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;
        } else {
            scale = mDrawableRect.width() / (float) mBitmapWidth;
            dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;
        }

        mShaderMatrix.setScale(scale, scale);
        mShaderMatrix.postTranslate((int) (dx + 0.5f) + mDrawableRect.left, (int) (dy + 0.5f) + mDrawableRect.top);

        mBitmapShader.setLocalMatrix(mShaderMatrix);
    }
}

layout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
  
  <CustomCircleCumNetworkImageView xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/header_icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="16dp"
        android:layout_marginTop="16dp"
        android:scaleType="centerCrop"
        android:src="@drawable/user_profile"
        app:border_color="@color/PrimaryForeground"
        app:border_width="1dp" />

</RelativeLayout>