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CircularImageView.javaAPI DocAndroid 5.1 API3902Thu Mar 12 22:22:50 GMT 2015com.android.ex.chips

CircularImageView

public class CircularImageView extends android.widget.ImageView
An ImageView class with a circle mask so that all images are drawn in a circle instead of a square.

Fields Summary
private static float
circularImageBorder
private final android.graphics.Matrix
matrix
private final android.graphics.RectF
source
private final android.graphics.RectF
destination
private final android.graphics.Paint
bitmapPaint
private final android.graphics.Paint
borderPaint
Constructors Summary
public CircularImageView(android.content.Context context)


       
        this(context, null, 0);
public CircularImageView(android.content.Context context, android.util.AttributeSet attrs)

        this(context, attrs, 0);
public CircularImageView(android.content.Context context, android.util.AttributeSet attrs, int defStyle)

        super(context, attrs, defStyle);

        matrix = new Matrix();
        source = new RectF();
        destination = new RectF();

        bitmapPaint = new Paint();
        bitmapPaint.setAntiAlias(true);
        bitmapPaint.setFilterBitmap(true);
        bitmapPaint.setDither(true);

        borderPaint = new Paint();
        borderPaint.setColor(Color.TRANSPARENT);
        borderPaint.setStyle(Paint.Style.STROKE);
        borderPaint.setStrokeWidth(circularImageBorder);
        borderPaint.setAntiAlias(true);
Methods Summary
public voiddrawBitmapWithCircleOnCanvas(android.graphics.Bitmap bitmap, android.graphics.Canvas canvas, android.graphics.RectF source, android.graphics.RectF dest)
Given the source bitmap and a canvas, draws the bitmap through a circular mask. Only draws a circle with diameter equal to the destination width.

param
bitmap The source bitmap to draw.
param
canvas The canvas to draw it on.
param
source The source bound of the bitmap.
param
dest The destination bound on the canvas.

        // Draw bitmap through shader first.
        BitmapShader shader = new BitmapShader(bitmap, Shader.TileMode.CLAMP,
                Shader.TileMode.CLAMP);
        matrix.reset();

        // Fit bitmap to bounds.
        matrix.setRectToRect(source, dest, Matrix.ScaleToFit.FILL);

        shader.setLocalMatrix(matrix);
        bitmapPaint.setShader(shader);
        canvas.drawCircle(dest.centerX(), dest.centerY(), dest.width() / 2f,
                bitmapPaint);

        // Then draw the border.
        canvas.drawCircle(dest.centerX(), dest.centerY(),
                dest.width() / 2f - circularImageBorder / 2, borderPaint);
protected voidonDraw(android.graphics.Canvas canvas)

        Drawable drawable = getDrawable();
        BitmapDrawable bitmapDrawable = null;
        // support state list drawable by getting the current state
        if (drawable instanceof StateListDrawable) {
            if (((StateListDrawable) drawable).getCurrent() != null) {
                bitmapDrawable = (BitmapDrawable) drawable.getCurrent();
            }
        } else {
            bitmapDrawable = (BitmapDrawable) drawable;
        }

        if (bitmapDrawable == null) {
            return;
        }
        Bitmap bitmap = bitmapDrawable.getBitmap();
        if (bitmap == null) {
            return;
        }

        source.set(0, 0, bitmap.getWidth(), bitmap.getHeight());
        destination.set(getPaddingLeft(), getPaddingTop(), getWidth() - getPaddingRight(),
                getHeight() - getPaddingBottom());

        drawBitmapWithCircleOnCanvas(bitmap, canvas, source, destination);