BottomItemView.java 文件源码

private void drawTargetBitmap(Canvas canvas,int alpha) {
//        mCanvas =canvas;
        mPaint = new Paint();
        mPaint.setColor(mSelectedColor);
        mPaint.setAntiAlias(true);
        mPaint.setDither(true);
        mPaint.setAlpha(alpha);
        mCanvas.drawRect(mIconRect, mPaint);
        mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
        mPaint.setAlpha(255);

        mCanvas.setDrawFilter(new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG));

        if (mIconBitmapSelected != null)
            mCanvas.drawBitmap(mIconBitmapSelected, mIconRect.left, mIconRect.top, mPaint);
        else
            mCanvas.drawBitmap(mIconBitmapNormal, mIconRect.left, mIconRect.top, mPaint);
        canvas.drawBitmap(mBitmap, 0, 0, null);

    }