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CircularBitmapDrawable.javaAPI DocAndroid 5.1 API5748Thu Mar 12 22:22:50 GMT 2015com.android.bitmap.drawable

CircularBitmapDrawable

public class CircularBitmapDrawable extends ExtendedBitmapDrawable
Custom BasicBitmapDrawable implementation for circular images. This draws all bitmaps as a circle with an optional border stroke.

Fields Summary
private static android.graphics.Matrix
sMatrix
private final android.graphics.Paint
mBitmapPaint
private final android.graphics.Paint
mBorderPaint
private float
mBorderWidth
private android.graphics.Bitmap
mShaderBitmap
Constructors Summary
public CircularBitmapDrawable(android.content.res.Resources res, com.android.bitmap.BitmapCache cache, boolean limitDensity)


      
                
        this(res, cache, limitDensity, null);
public CircularBitmapDrawable(android.content.res.Resources res, com.android.bitmap.BitmapCache cache, boolean limitDensity, ExtendedOptions opts)

        super(res, cache, limitDensity, opts);

        mBitmapPaint.setAntiAlias(true);
        mBitmapPaint.setFilterBitmap(true);
        mBitmapPaint.setDither(true);

        mBorderPaint.setColor(Color.TRANSPARENT);
        mBorderPaint.setStyle(Style.STROKE);
        mBorderPaint.setStrokeWidth(mBorderWidth);
        mBorderPaint.setAntiAlias(true);
Methods Summary
protected voidonDrawBitmap(android.graphics.Canvas canvas, android.graphics.Rect src, android.graphics.Rect dst)

        onDrawCircularBitmap(getBitmap().bmp, canvas, src, dst, 1f);
protected voidonDrawCircularBitmap(android.graphics.Bitmap bitmap, android.graphics.Canvas canvas, android.graphics.Rect src, android.graphics.Rect dst)
Call this method with a given bitmap to draw it onto the given canvas, masked by a circular BitmapShader.

        onDrawCircularBitmap(bitmap, canvas, src, dst, 1f);
protected voidonDrawCircularBitmap(android.graphics.Bitmap bitmap, android.graphics.Canvas canvas, android.graphics.Rect src, android.graphics.Rect dst, float alpha)
Call this method with a given bitmap to draw it onto the given canvas, masked by a circular BitmapShader. The alpha parameter is the value from 0f to 1f to attenuate the alpha by.

        // Draw bitmap through shader first.
        BitmapShader shader = (BitmapShader) mBitmapPaint.getShader();
        if (shader == null || mShaderBitmap != bitmap) {
          shader = new BitmapShader(bitmap, TileMode.CLAMP, TileMode.CLAMP);
          mShaderBitmap = bitmap;
        }

        sMatrix.reset();
        // Fit bitmap to bounds.
        float scale = Math.max((float) dst.width() / src.width(),
                (float) dst.height() / src.height());
        sMatrix.postScale(scale, scale);
        // Translate bitmap to dst bounds.
        sMatrix.postTranslate(dst.left, dst.top);
        shader.setLocalMatrix(sMatrix);
        mBitmapPaint.setShader(shader);

        int oldAlpha = mBitmapPaint.getAlpha();
        mBitmapPaint.setAlpha((int) (oldAlpha * alpha));
        canvas.drawCircle(dst.centerX(), dst.centerY(), dst.width() / 2,
                mBitmapPaint);
        mBitmapPaint.setAlpha(oldAlpha);

        // Then draw the border.
        canvas.drawCircle(dst.centerX(), dst.centerY(),
                dst.width() / 2f - mBorderWidth / 2, mBorderPaint);
protected voidonDrawPlaceholderOrProgress(android.graphics.Canvas canvas, TileDrawable drawable)

        BitmapDrawable placeholder = (BitmapDrawable) drawable.getInnerDrawable();
        Bitmap bitmap = placeholder.getBitmap();
        float alpha = placeholder.getPaint().getAlpha() / 255f;
        sRect.set(0, 0, bitmap.getWidth(), bitmap.getHeight());
        onDrawCircularBitmap(bitmap, canvas, sRect, getBounds(), alpha);
public voidsetAlpha(int alpha)

        super.setAlpha(alpha);

        final int old = mBitmapPaint.getAlpha();
        mBitmapPaint.setAlpha(alpha);
        if (alpha != old) {
            invalidateSelf();
        }
public voidsetBorderColor(int color)
Set the border stroke color of this drawable. Set to {@link Color#TRANSPARENT} to disable.

        final boolean changed = mBorderPaint.getColor() != color;
        mBorderPaint.setColor(color);

        if (changed) {
            invalidateSelf();
        }
public voidsetBorderWidth(float borderWidth)
Set the border stroke width of this drawable.

        final boolean changed = mBorderPaint.getStrokeWidth() != borderWidth;
        mBorderPaint.setStrokeWidth(borderWidth);
        mBorderWidth = borderWidth;

        if (changed) {
            invalidateSelf();
        }
public voidsetColorFilter(android.graphics.ColorFilter cf)

        super.setColorFilter(cf);
        mPaint.setColorFilter(cf);