Example usage for android.graphics Canvas drawCircle

List of usage examples for android.graphics Canvas drawCircle

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Introduction

In this page you can find the example usage for android.graphics Canvas drawCircle.

Prototype

public void drawCircle(float cx, float cy, float radius, @NonNull Paint paint)

Source Link

Document

Draw the specified circle using the specified paint.

Usage

From source file:com.mwm.loyal.libs.zxing.ViewfinderView.java

@SuppressLint("DrawAllocation")
@Override//from   w w  w .  j  a v  a 2  s.  co  m
public void onDraw(Canvas canvas) {
    if (cameraManager == null) {
        return; // not ready yet, early draw before done configuring
    }
    Rect frame = cameraManager.getFramingRect();
    Rect previewFrame = cameraManager.getFramingRectInPreview();
    if (frame == null || previewFrame == null) {
        return;
    }
    int width = canvas.getWidth();
    int height = canvas.getHeight();

    // Draw the exterior (i.e. outside the framing rect) darkened
    paint.setColor(resultBitmap != null ? resultColor : maskColor);
    canvas.drawRect(0, 0, width, frame.top, paint);
    canvas.drawRect(0, frame.top, frame.left, frame.bottom + 1, paint);
    canvas.drawRect(frame.right + 1, frame.top, width, frame.bottom + 1, paint);
    canvas.drawRect(0, frame.bottom + 1, width, height, paint);

    if (resultBitmap != null) {
        // Draw the opaque result bitmap over the scanning rectangle
        paint.setAlpha(CURRENT_POINT_OPACITY);
        canvas.drawBitmap(resultBitmap, null, frame, paint);
    } else {

        // Draw a red "laser scanner" line through the middle to permissionDialog decoding is active
        paint.setColor(laserColor);
        paint.setAlpha(SCANNER_ALPHA[scannerAlpha]);
        scannerAlpha = (scannerAlpha + 1) % SCANNER_ALPHA.length;
        int middle = frame.height() / 2 + frame.top;
        canvas.drawRect(frame.left + 2, middle - 1, frame.right - 1, middle + 2, paint);

        float scaleX = frame.width() / (float) previewFrame.width();
        float scaleY = frame.height() / (float) previewFrame.height();

        List<ResultPoint> currentPossible = possibleResultPoints;
        List<ResultPoint> currentLast = lastPossibleResultPoints;
        int frameLeft = frame.left;
        int frameTop = frame.top;
        if (currentPossible.isEmpty()) {
            lastPossibleResultPoints = null;
        } else {
            possibleResultPoints = new ArrayList<>(5);
            lastPossibleResultPoints = currentPossible;
            paint.setAlpha(CURRENT_POINT_OPACITY);
            paint.setColor(resultPointColor);
            synchronized (currentPossible) {
                for (ResultPoint point : currentPossible) {
                    canvas.drawCircle(frameLeft + (int) (point.getX() * scaleX),
                            frameTop + (int) (point.getY() * scaleY), POINT_SIZE, paint);
                }
            }
        }
        if (currentLast != null) {
            paint.setAlpha(CURRENT_POINT_OPACITY / 2);
            paint.setColor(resultPointColor);
            synchronized (currentLast) {
                float radius = POINT_SIZE / 2.0f;
                for (ResultPoint point : currentLast) {
                    canvas.drawCircle(frameLeft + (int) (point.getX() * scaleX),
                            frameTop + (int) (point.getY() * scaleY), radius, paint);
                }
            }
        }

        // Request another update at the animation interval, but only repaint the laser line,
        // not the entire viewfinder mask.
        postInvalidateDelayed(ANIMATION_DELAY, frame.left - POINT_SIZE, frame.top - POINT_SIZE,
                frame.right + POINT_SIZE, frame.bottom + POINT_SIZE);
    }
}

From source file:com.example1.ui.CirclePageIndicator.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if (mViewPager == null) {
        return;/*from  w ww .  j  ava2  s  .c o  m*/
    }
    final int count = mViewPager.getAdapter().getCount();
    if (count == 0) {
        return;
    }

    if (mCurrentPage >= count) {
        setCurrentItem(count - 1);
        return;
    }

    int longSize;
    int longPaddingBefore;
    int longPaddingAfter;
    int shortPaddingBefore;
    if (mOrientation == HORIZONTAL) {
        longSize = getWidth();
        longPaddingBefore = getPaddingLeft();
        longPaddingAfter = getPaddingRight();
        shortPaddingBefore = getPaddingTop();
    } else {
        longSize = getHeight();
        longPaddingBefore = getPaddingTop();
        longPaddingAfter = getPaddingBottom();
        shortPaddingBefore = getPaddingLeft();
    }

    final float threeRadius = mRadius * 3;
    final float shortOffset = shortPaddingBefore + mRadius;
    float longOffset = longPaddingBefore + mRadius;
    if (mCentered) {
        longOffset += ((longSize - longPaddingBefore - longPaddingAfter) / 2.0f)
                - ((count * threeRadius) / 2.0f) - ((count * mExtraSpace) / 2.0f);
    }

    float dX;
    float dY;

    float pageFillRadius = mRadius;
    if (mPaintStroke.getStrokeWidth() > 0) {
        pageFillRadius -= mPaintStroke.getStrokeWidth() / 2.0f;
    }

    //Draw stroked circles
    for (int iLoop = 0; iLoop < count; iLoop++) {
        float drawLong = longOffset + (iLoop * (threeRadius + mExtraSpace));
        if (mOrientation == HORIZONTAL) {
            dX = drawLong;
            dY = shortOffset;
        } else {
            dX = shortOffset;
            dY = drawLong;
        }
        // Only paint fill if not completely transparent
        if (mPaintPageFill.getAlpha() > 0) {
            canvas.drawCircle(dX, dY, pageFillRadius, mPaintPageFill);
        }

        // Only paint stroke if a stroke width was non-zero
        if (pageFillRadius != mRadius) {
            canvas.drawCircle(dX, dY, mRadius, mPaintStroke);
        }
    }

    //Draw the filled circle according to the current scroll
    float cx = (mSnap ? mSnapPage : mCurrentPage) * (threeRadius + mExtraSpace);
    if (!mSnap) {
        cx += mPageOffset * (threeRadius + mExtraSpace);
    }
    if (mOrientation == HORIZONTAL) {
        dX = longOffset + cx;
        dY = shortOffset;
    } else {
        dX = shortOffset;
        dY = longOffset + cx;
    }
    canvas.drawCircle(dX, dY, mRadius, mPaintFill);
}

From source file:com.dns.taxchina.ui.widget.CirclePageIndicator.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if (mViewPager == null) {
        return;// w w w . j  av  a2s. c  om
    }
    final int count = mViewPager.getAdapter().getCount();
    if (count == 0) {
        return;
    }

    if (mCurrentPage >= count) {
        setCurrentItem(count - 1);
        return;
    }

    int longSize;
    int longPaddingBefore;
    int longPaddingAfter;
    int shortPaddingBefore;
    if (mOrientation == HORIZONTAL) {
        longSize = getWidth();
        longPaddingBefore = getPaddingLeft();
        longPaddingAfter = getPaddingRight();
        shortPaddingBefore = getPaddingTop();
    } else {
        longSize = getHeight();
        longPaddingBefore = getPaddingTop();
        longPaddingAfter = getPaddingBottom();
        shortPaddingBefore = getPaddingLeft();
    }

    // final float threeRadius = mRadius * 5;
    // final float threeRadius = 24;
    final float shortOffset = shortPaddingBefore + mRadius;
    float longOffset = longPaddingBefore + mRadius;
    if (mCentered) {
        longOffset += ((longSize - longPaddingBefore - longPaddingAfter) / 2.0f)
                - ((count * threeRadius) / 2.0f);
    }

    float dX;
    float dY;

    float pageFillRadius = mRadius;
    if (mPaintStroke.getStrokeWidth() > 0) {
        pageFillRadius -= mPaintStroke.getStrokeWidth() / 2.0f;
    }

    // Draw stroked circles
    for (int iLoop = 0; iLoop < count; iLoop++) {
        float drawLong = longOffset + (iLoop * threeRadius);
        if (mOrientation == HORIZONTAL) {
            dX = drawLong;
            dY = shortOffset;
        } else {
            dX = shortOffset;
            dY = drawLong;
        }
        // Only paint fill if not completely transparent
        if (mPaintPageFill.getAlpha() > 0) {
            canvas.drawCircle(dX, dY, pageFillRadius, mPaintPageFill);
        }

        // Only paint stroke if a stroke width was non-zero
        if (pageFillRadius != mRadius) {
            canvas.drawCircle(dX, dY, mRadius, mPaintStroke);
        }
    }

    // Draw the filled circle according to the current scroll
    float cx = (mSnap ? mSnapPage : mCurrentPage) * threeRadius;
    if (!mSnap) {
        cx += mPageOffset * threeRadius;
    }
    if (mOrientation == HORIZONTAL) {
        dX = longOffset + cx;
        dY = shortOffset;
    } else {
        dX = shortOffset;
        dY = longOffset + cx;
    }
    canvas.drawCircle(dX, dY, mRadius, mPaintFill);
}

From source file:com.ipassistat.ipa.view.banner.CirclePageIndicator.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if (mViewPager == null) {
        return;// w  w w  .  j av  a2s.com
    }
    final int count = mViewPager.getAdapter().getCount();
    if (count == 0) {
        return;
    }

    if (mCurrentPage >= count) {
        setCurrentItem(count - 1);
        return;
    }

    int longSize;
    int longPaddingBefore;
    int longPaddingAfter;
    int shortPaddingBefore;
    if (mOrientation == HORIZONTAL) {
        longSize = getWidth();
        longPaddingBefore = getPaddingLeft();
        longPaddingAfter = getPaddingRight();
        shortPaddingBefore = getPaddingTop();
    } else {
        longSize = getHeight();
        longPaddingBefore = getPaddingTop();
        longPaddingAfter = getPaddingBottom();
        shortPaddingBefore = getPaddingLeft();
    }

    final float threeRadius = mRadius * gap; //  ?
    final float shortOffset = shortPaddingBefore + mRadius;
    float longOffset = longPaddingBefore + mRadius;
    if (mCentered) {
        longOffset += ((longSize - longPaddingBefore - longPaddingAfter) / 2.0f)
                - ((count * threeRadius) / 2.0f);
    }

    float dX;
    float dY;

    float pageFillRadius = mRadius; // ?
    if (mPaintStroke.getStrokeWidth() > 0) {
        pageFillRadius -= mPaintStroke.getStrokeWidth();
    }

    // Draw stroked circles
    for (int iLoop = 0; iLoop < count; iLoop++) {
        float drawLong = longOffset + (iLoop * threeRadius);
        if (mOrientation == HORIZONTAL) {
            dX = drawLong;
            dY = shortOffset;
        } else {
            dX = shortOffset;
            dY = drawLong;
        }
        // Only paint fill if not completely transparent
        if (mPaintPageFill.getAlpha() > 0) {
            canvas.drawCircle(dX, dY, pageFillRadius, mPaintPageFill);
        }

        // Only paint stroke if a stroke width was non-zero
        if (pageFillRadius != mRadius) {
            canvas.drawCircle(dX, dY, mRadius - mPaintStroke.getStrokeWidth() / 2, mPaintStroke);
        }
    }

    // Draw the filled circle according to the current scroll
    float cx = (mSnap ? mSnapPage : mCurrentPage) * threeRadius;
    if (!mSnap) {
        cx += mPageOffset * threeRadius;
    }
    if (mOrientation == HORIZONTAL) {
        dX = longOffset + cx;
        dY = shortOffset;
    } else {
        dX = shortOffset;
        dY = longOffset + cx;
    }
    canvas.drawCircle(dX, dY, mRadius, mPaintFill);
}

From source file:com.common.view.recyclerviewpage.indicator.RecyclerCirclePageIndicator.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if (mRecyclerView == null) {
        return;/* w  ww. j ava 2 s . co  m*/
    }
    final int count = mRecyclerView.getAdapter().getItemCount();
    if (count == 0) {
        return;
    }

    if (mCurrentPage >= count) {
        setCurrentItem(count - 1);
        return;
    }

    int longSize;
    int longPaddingBefore;
    int longPaddingAfter;
    int shortPaddingBefore;
    if (mOrientation == HORIZONTAL) {
        longSize = getWidth();
        longPaddingBefore = getPaddingLeft();
        longPaddingAfter = getPaddingRight();
        shortPaddingBefore = getPaddingTop();
    } else {
        longSize = getHeight();
        longPaddingBefore = getPaddingTop();
        longPaddingAfter = getPaddingBottom();
        shortPaddingBefore = getPaddingLeft();
    }

    final float threeRadius = mRadius * 3;
    final float shortOffset = shortPaddingBefore + mRadius;
    float longOffset = longPaddingBefore + mRadius;
    if (mCentered) {
        longOffset += ((longSize - longPaddingBefore - longPaddingAfter) / 2.0f)
                - ((count * threeRadius) / 2.0f);
    }

    float dX;
    float dY;

    float pageFillRadius = mRadius;
    if (mPaintStroke.getStrokeWidth() > 0) {
        pageFillRadius -= mPaintStroke.getStrokeWidth() / 2.0f;
    }

    //Draw stroked circles
    for (int iLoop = 0; iLoop < count; iLoop++) {
        float drawLong = longOffset + (iLoop * threeRadius);
        if (mOrientation == HORIZONTAL) {
            dX = drawLong;
            dY = shortOffset;
        } else {
            dX = shortOffset;
            dY = drawLong;
        }
        // Only paint fill if not completely transparent
        if (mPaintPageFill.getAlpha() > 0) {
            canvas.drawCircle(dX, dY, pageFillRadius, mPaintPageFill);
        }

        // Only paint stroke if a stroke width was non-zero
        if (pageFillRadius != mRadius) {
            canvas.drawCircle(dX, dY, mRadius, mPaintStroke);
        }
    }

    //Draw the filled circle according to the current scroll
    float cx = (mSnap ? mSnapPage : mCurrentPage) * threeRadius;
    if (!mSnap) {
        cx += mPageOffset * threeRadius;
    }
    if (mOrientation == HORIZONTAL) {
        dX = longOffset + cx;
        dY = shortOffset;
    } else {
        dX = shortOffset;
        dY = longOffset + cx;
    }
    canvas.drawCircle(dX, dY, mRadius, mPaintFill);
}

From source file:com.daocheng.girlshop.view.CirclePageIndicatorB.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    if (mViewPager == null) {
        return;//from  w w w.j  a va 2  s  .c o m
    }
    final int count = mViewPager.getAdapter().getCount();
    if (count == 0) {
        return;
    }

    //              if (mCurrentPage >= count) {
    //                  setCurrentItem(count - 1);
    //                  return;
    //              }

    int longSize;
    int longPaddingBefore;
    int longPaddingAfter;
    int shortPaddingBefore;
    if (mOrientation == HORIZONTAL) {
        longSize = getWidth();
        longPaddingBefore = getPaddingLeft();
        longPaddingAfter = getPaddingRight();
        shortPaddingBefore = getPaddingTop();
    } else {
        longSize = getHeight();
        longPaddingBefore = getPaddingTop();
        longPaddingAfter = getPaddingBottom();
        shortPaddingBefore = getPaddingLeft();
    }

    final float threeRadius = mRadius * 3;
    final float shortOffset = shortPaddingBefore + mRadius;
    float longOffset = longPaddingBefore + mRadius;
    if (mCentered) {
        longOffset += ((longSize - longPaddingBefore - longPaddingAfter) / 2.0f)
                - ((count * threeRadius) / 2.0f);
    }

    float dX;
    float dY;

    float pageFillRadius = mRadius;
    if (mPaintStroke.getStrokeWidth() > 0) {
        pageFillRadius -= mPaintStroke.getStrokeWidth() / 2.0f;
    }

    //Draw stroked circles
    for (int iLoop = 0; iLoop < count; iLoop++) {
        float drawLong = longOffset + (iLoop * threeRadius);
        if (mOrientation == HORIZONTAL) {
            dX = drawLong;
            dY = shortOffset;
        } else {
            dX = shortOffset;
            dY = drawLong;
        }
        // Only paint fill if not completely transparent
        if (mPaintPageFill.getAlpha() > 0) {
            canvas.drawCircle(dX, dY, pageFillRadius, mPaintPageFill);
        }

        // Only paint stroke if a stroke width was non-zero
        if (pageFillRadius != mRadius) {
            canvas.drawCircle(dX, dY, mRadius, mPaintStroke);
        }
    }

    //Draw the filled circle according to the current scroll
    float cx = (mSnap ? mSnapPage : (mCurrentPage % mViewPager.getAdapter().getCount())) * threeRadius;
    if (!mSnap) {
        cx += mPageOffset * threeRadius;
    }
    if (mOrientation == HORIZONTAL) {
        dX = longOffset + cx;
        dY = shortOffset;
    } else {
        dX = shortOffset;
        dY = longOffset + cx;
    }
    canvas.drawCircle(dX, dY, mRadius, mPaintFill);
}

From source file:com.pendulab.theExchange.widget.CirclePageIndicator.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if (mViewPager == null) {
        return;/*  w  w w  .j ava  2 s  . c  om*/
    }
    if (mViewPager.getAdapter() == null) {
        return;
    }
    final int count = mViewPager.getAdapter().getCount();
    if (count == 0) {
        return;
    }

    if (mCurrentPage >= count) {
        setCurrentItem(count - 1);
        return;
    }

    int longSize;
    int longPaddingBefore;
    int longPaddingAfter;
    int shortPaddingBefore;
    if (mOrientation == HORIZONTAL) {
        longSize = getWidth();
        longPaddingBefore = getPaddingLeft();
        longPaddingAfter = getPaddingRight();
        shortPaddingBefore = getPaddingTop();
    } else {
        longSize = getHeight();
        longPaddingBefore = getPaddingTop();
        longPaddingAfter = getPaddingBottom();
        shortPaddingBefore = getPaddingLeft();
    }

    final float threeRadius = mRadius * 3;
    final float shortOffset = shortPaddingBefore + mRadius;
    float longOffset = longPaddingBefore + mRadius;
    if (mCentered) {
        longOffset += ((longSize - longPaddingBefore - longPaddingAfter) / 2.0f)
                - ((count * threeRadius) / 2.0f);
    }

    float dX;
    float dY;

    float pageFillRadius = mRadius;
    if (mPaintStroke.getStrokeWidth() > 0) {
        pageFillRadius -= mPaintStroke.getStrokeWidth() / 2.0f;
    }

    //Draw stroked circles
    for (int iLoop = 0; iLoop < count; iLoop++) {
        float drawLong = longOffset + (iLoop * threeRadius);
        if (mOrientation == HORIZONTAL) {
            dX = drawLong;
            dY = shortOffset;
        } else {
            dX = shortOffset;
            dY = drawLong;
        }
        // Only paint fill if not completely transparent
        if (mPaintPageFill.getAlpha() > 0) {
            canvas.drawCircle(dX, dY, pageFillRadius, mPaintPageFill);
        }

        // Only paint stroke if a stroke width was non-zero
        if (pageFillRadius != mRadius) {
            canvas.drawCircle(dX, dY, mRadius, mPaintStroke);
        }
    }

    //Draw the filled circle according to the current scroll
    float cx = (mSnap ? mSnapPage : mCurrentPage) * threeRadius;
    if (!mSnap) {
        cx += mPageOffset * threeRadius;
    }
    if (mOrientation == HORIZONTAL) {
        dX = longOffset + cx;
        dY = shortOffset;
    } else {
        dX = shortOffset;
        dY = longOffset + cx;
    }
    canvas.drawCircle(dX, dY, mRadius, mPaintFill);
}

From source file:com.consumer.widget.CirclePageIndicator.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if (mViewPager == null) {
        return;/*from  www .  j a v  a  2 s  .co m*/
    }
    final int count = mViewPager.getAdapter().getCount();
    if (count == 0) {
        return;
    }

    if (mCurrentPage >= count) {
        setCurrentItem(count - 1);
        return;
    }

    int longSize;
    int longPaddingBefore;
    int longPaddingAfter;
    int shortPaddingBefore;
    if (mOrientation == HORIZONTAL) {
        longSize = getWidth();
        longPaddingBefore = getPaddingLeft();
        longPaddingAfter = getPaddingRight();
        shortPaddingBefore = getPaddingTop();
    } else {
        longSize = getHeight();
        longPaddingBefore = getPaddingTop();
        longPaddingAfter = getPaddingBottom();
        shortPaddingBefore = getPaddingLeft();
    }

    final float threeRadius = mRadius * 3;
    final float shortOffset = shortPaddingBefore + mRadius;
    float longOffset = longPaddingBefore + mRadius;
    if (mCentered) {
        longOffset += ((longSize - longPaddingBefore - longPaddingAfter) / 2.0f)
                - ((count * threeRadius) / 2.0f);
    }

    float dX;
    float dY;

    float pageFillRadius = mRadius;
    if (mPaintStroke.getStrokeWidth() > 0) {
        pageFillRadius -= mPaintStroke.getStrokeWidth() / 2.0f;
    }

    //Draw stroked circles
    for (int iLoop = 0; iLoop < count; iLoop++) {
        float drawLong = longOffset + (iLoop * threeRadius);
        if (mOrientation == HORIZONTAL) {
            dX = drawLong;
            dY = shortOffset;
        } else {
            dX = shortOffset;
            dY = drawLong;
        }

        if (count > 0 && iLoop < count - 1) {

            // Only paint fill if not completely transparent
            if (mPaintPageFill.getAlpha() > 0) {
                canvas.drawCircle(dX, dY, pageFillRadius, mPaintPageFill);
            }

            // Only paint stroke if a stroke width was non-zero
            if (pageFillRadius != mRadius) {
                mPaintStrokeTry.setColor(context.getResources().getColor(R.color.circleBlue));
                canvas.drawCircle(dX, dY, mRadius, mPaintStrokeTry);
            }
        } else {
            // mPaintStrokeTry.setColor(context.getResources().getColor(R.color.circleBlue));
            // canvas.drawCircle(dX, dY, mRadius, mPaintStrokeTry);
            canvas.drawCircle(dX, dY, mRadius, mPaintStroke);
        }
    }

    //Draw the filled circle according to the current scroll
    float cx = (mSnap ? mSnapPage : mCurrentPage) * threeRadius;
    if (!mSnap) {
        cx += mPageOffset * threeRadius;
    }
    if (mOrientation == HORIZONTAL) {
        dX = longOffset + cx;
        dY = shortOffset;
    } else {
        dX = shortOffset;
        dY = longOffset + cx;
    }
    canvas.drawCircle(dX, dY, mRadius, mPaintFill);
}

From source file:com.e.common.widget.viewpager.CirclePageIndicator.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if (mViewPager == null) {
        return;/*  w  w  w.j a v  a  2  s. c  o  m*/
    }
    final int count = mViewPager.getAdapter().getCount();
    if (count == 0 || count == 1) {
        return;
    }

    if (mCurrentPage >= count) {
        setCurrentItem(count - 1);
        return;
    }

    int longSize;
    int longPaddingBefore;
    int longPaddingAfter;
    int shortPaddingBefore;
    if (mOrientation == HORIZONTAL) {
        longSize = getWidth();
        longPaddingBefore = getPaddingLeft();
        longPaddingAfter = getPaddingRight();
        shortPaddingBefore = getPaddingTop();
    } else {
        longSize = getHeight();
        longPaddingBefore = getPaddingTop();
        longPaddingAfter = getPaddingBottom();
        shortPaddingBefore = getPaddingLeft();
    }

    final float threeRadius = mRadius * mMargin;
    final float shortOffset = shortPaddingBefore + mRadius;
    float longOffset = longPaddingBefore + mRadius;
    if (mCentered) {
        longOffset += ((longSize - longPaddingBefore - longPaddingAfter)
                - ((count - 1) * threeRadius + count * mRadius * 2)) / 2.0f;
    }

    float dX;
    float dY;

    float pageFillRadius = mRadius;
    if (mPaintStroke.getStrokeWidth() > 0) {
        pageFillRadius -= mPaintStroke.getStrokeWidth() / 2.0f;
    }

    // Draw stroked circles
    for (int iLoop = 0; iLoop < count; iLoop++) {
        float drawLong = longOffset + (iLoop * threeRadius) + iLoop * mRadius * 2;
        if (mOrientation == HORIZONTAL) {
            dX = drawLong;
            dY = shortOffset;
        } else {
            dX = shortOffset;
            dY = drawLong;
        }
        // Only paint fill if not completely transparent
        if (mPaintPageFill.getAlpha() > 0) {
            canvas.drawCircle(dX, dY, pageFillRadius, mPaintPageFill);
        }

        // Only paint stroke if a stroke width was non-zero
        if (pageFillRadius != mRadius) {
            canvas.drawCircle(dX, dY, mRadius, mPaintStroke);
        }
    }

    // Draw the filled circle according to the current scroll
    int currentPage = mSnap ? mSnapPage : mCurrentPage;
    float cx = currentPage * threeRadius + currentPage * mRadius * 2;
    if (!mSnap) {
        cx += mPageOffset * (mRadius * 2 + threeRadius);
    }
    if (mOrientation == HORIZONTAL) {
        dX = longOffset + cx;
        dY = shortOffset;
    } else {
        dX = shortOffset;
        dY = longOffset + cx;
    }
    canvas.drawCircle(dX, dY, mRadius, mPaintFill);
}

From source file:com.cmbb.smartkids.photopicker.widget.indication.CirclePageIndicator.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if (mViewPager == null) {
        return;//  w w w.  j ava2 s  .com
    }
    final int count = mViewPager.getAdapter().getCount();
    if (count == 0) {
        return;
    }

    if (mCurrentPage >= count) {
        setCurrentItem(count - 1);
        return;
    }

    int longSize;
    int longPaddingBefore;
    int longPaddingAfter;
    int shortPaddingBefore;
    if (mOrientation == HORIZONTAL) {
        longSize = getWidth();
        longPaddingBefore = getPaddingLeft();
        longPaddingAfter = getPaddingRight();
        shortPaddingBefore = getPaddingTop();
    } else {
        longSize = getHeight();
        longPaddingBefore = getPaddingTop();
        longPaddingAfter = getPaddingBottom();
        shortPaddingBefore = getPaddingLeft();
    }

    final float threeRadius = mRadius * 3;
    final float shortOffset = shortPaddingBefore + mRadius;
    float longOffset = longPaddingBefore + mRadius;
    if (mCentered) {
        longOffset += ((longSize - longPaddingBefore - longPaddingAfter) / 2.0f)
                - ((count * threeRadius) / 2.0f);
    } else {
        longOffset = longSize - longPaddingAfter - (count * threeRadius);
    }

    float dX;
    float dY;

    float pageFillRadius = mRadius;
    if (mPaintStroke.getStrokeWidth() > 0) {
        pageFillRadius -= mPaintStroke.getStrokeWidth() / 2.0f;
    }

    //Draw stroked circles
    for (int iLoop = 0; iLoop < count; iLoop++) {
        float drawLong = longOffset + (iLoop * threeRadius);
        if (mOrientation == HORIZONTAL) {
            dX = drawLong;
            dY = shortOffset;
        } else {
            dX = shortOffset;
            dY = drawLong;
        }
        // Only paint fill if not completely transparent
        if (mPaintPageFill.getAlpha() > 0) {
            canvas.drawCircle(dX, dY, pageFillRadius, mPaintPageFill);
        }

        // Only paint stroke if a stroke width was non-zero
        if (pageFillRadius != mRadius) {
            canvas.drawCircle(dX, dY, mRadius, mPaintStroke);
        }
    }

    //Draw the filled circle according to the current scroll
    float cx = (mSnap ? mSnapPage : mCurrentPage) * threeRadius;
    if (!mSnap) {
        cx += mPageOffset * threeRadius;
    }
    if (mOrientation == HORIZONTAL) {
        dX = longOffset + cx;
        dY = shortOffset;
    } else {
        dX = shortOffset;
        dY = longOffset + cx;
    }
    canvas.drawCircle(dX, dY, mRadius, mPaintFill);
}