Example usage for android.graphics Canvas drawLine

List of usage examples for android.graphics Canvas drawLine

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Introduction

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

Prototype

public void drawLine(float startX, float startY, float stopX, float stopY, @NonNull Paint paint)

Source Link

Document

Draw a line segment with the specified start and stop x,y coordinates, using the specified paint.

Usage

From source file:com.wangbb.naruto.app.view.PagerSlidingTabStrip.java

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

    if (isInEditMode() || tabCount == 0) {
        return;/*w w w  . j  a  va  2s .  co  m*/
    }

    final int height = getHeight();

    // draw underline
    rectPaint.setColor(underlineColor);
    canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);

    // draw indicator line
    rectPaint.setColor(indicatorColor);

    // default: line below current tab
    View currentTab = tabsContainer.getChildAt(currentPosition);
    float lineLeft = currentTab.getLeft() + iLinePadding;
    float lineRight = currentTab.getRight() - iLinePadding;

    // if there is an offset, start interpolating left and right coordinates
    // between current and next tab
    if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {

        View nextTab = tabsContainer.getChildAt(currentPosition + 1);
        final float nextTabLeft = nextTab.getLeft() + iLinePadding;
        final float nextTabRight = nextTab.getRight() - iLinePadding;

        lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
        lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);
    }

    canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height, rectPaint);

    // draw divider

    dividerPaint.setColor(dividerColor);
    for (int i = 0; i < tabCount - 1; i++) {
        View tab = tabsContainer.getChildAt(i);
        canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
    }
}

From source file:com.base.indicator.PagerIndicator.java

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

    if (isInEditMode() || tabCount == 0) {
        return;// ww w . j a v a2s.co  m
    }

    final int height = getHeight();

    // draw indicator line

    rectPaint.setColor(indicatorColor);

    // default: line below current tab
    View currentTab = tabsContainer.getChildAt(currentPosition);
    float lineLeft = currentTab.getLeft();
    float lineRight = currentTab.getRight();

    // if there is an offset, start interpolating left and right coordinates between current and next tab
    if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {

        View nextTab = tabsContainer.getChildAt(currentPosition + 1);
        final float nextTabLeft = nextTab.getLeft();
        final float nextTabRight = nextTab.getRight();

        lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
        lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);
    }

    if (shouldSameWidth) {
        canvas.drawRect(lineLeft + tabPadding, height - indicatorHeight, lineRight - tabPadding, height,
                rectPaint);
    } else {
        canvas.drawRect(lineLeft + tabPadding / 2, height - indicatorHeight, lineRight - tabPadding / 2, height,
                rectPaint);
    }

    // draw underline

    rectPaint.setColor(underlineColor);

    canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);

    // draw divider

    dividerPaint.setColor(dividerColor);
    for (int i = 0; i < tabCount - 1; i++) {
        View tab = tabsContainer.getChildAt(i);
        canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
    }
}

From source file:com.yktx.check.widget.OldPagerSlidingTabStrip.java

@SuppressLint("DrawAllocation")
@Override//  w ww .j  a  v  a2 s.com
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    if (isInEditMode() || tabCount == 0) {
        return;
    }

    final int height = getHeight();

    // draw underline
    rectPaint.setColor(underlineColor);
    canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);

    // draw indicator line
    rectPaint.setColor(indicatorColor);
    // default: line below current tab
    View currentTab = tabsContainer.getChildAt(currentPosition);
    float lineLeft = currentTab.getLeft();
    float lineRight = currentTab.getRight();

    // if there is an offset, start interpolating left and right coordinates
    // between current and next tab
    if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {

        View nextTab = tabsContainer.getChildAt(currentPosition + 1);
        final float nextTabLeft = nextTab.getLeft();
        final float nextTabRight = nextTab.getRight();

        lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
        lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);
    }

    canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height, rectPaint);
    // Bitmap bitmap = BitmapFactory.decodeResource(getResources(),
    // R.drawable.xinjian_tuijian_huakuai);
    // canvas.drawBitmap(bitmap, lineLeft, height - indicatorHeight,
    // rectPaint);
    // draw divider

    dividerPaint.setColor(dividerColor);
    for (int i = 0; i < tabCount - 1; i++) {
        View tab = tabsContainer.getChildAt(i);
        canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
    }
}

From source file:com.witmoon.xmb.ui.widget.PagerSlidingTabStrip.java

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

    if (isInEditMode() || tabCount == 0) {
        return;//from  w  w w. j av  a  2s . c o m
    }

    final int height = getHeight();

    // draw indicator line

    rectPaint.setColor(indicatorColor);

    // default: line below current tab
    View currentTab = tabsContainer.getChildAt(currentPosition);
    float lineLeft = currentTab.getLeft();
    float lineRight = currentTab.getRight();

    // if there is an offset, start interpolating left and right coordinates between current and next tab
    if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {

        View nextTab = tabsContainer.getChildAt(currentPosition + 1);
        final float nextTabLeft = nextTab.getLeft();
        final float nextTabRight = nextTab.getRight();

        lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
        lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);
    }

    canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height, rectPaint);

    // draw underline

    rectPaint.setColor(underlineColor);
    canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);

    // draw divider

    dividerPaint.setColor(dividerColor);
    for (int i = 0; i < tabCount - 1; i++) {
        View tab = tabsContainer.getChildAt(i);
        //            Log.e("height - dividerPadding", height - dividerPadding + "");
        //            Log.e("dividerColor", dividerColor + "");
        canvas.drawLine(tab.getRight() - 1, dividerPadding, tab.getRight() - 1, height - dividerPadding,
                dividerPaint);
    }
}

From source file:za.jamie.soundstage.widgets.PagerSlidingTabStrip.java

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

    if (isInEditMode() || tabCount == 0) {
        return;//w  w w . j a va 2 s  . co m
    }

    final int height = getHeight();

    // default: line below current tab
    TextView currentTab = (TextView) tabsContainer.getChildAt(currentPosition);
    float lineLeft = currentTab.getLeft();
    float lineRight = currentTab.getRight();

    // if there is an offset, start interpolating left and right coordinates between current and next tab
    if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {
        TextView nextTab = (TextView) tabsContainer.getChildAt(currentPosition + 1);
        final float nextTabLeft = nextTab.getLeft();
        final float nextTabRight = nextTab.getRight();

        lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
        lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);

        int currentTabColor = (Integer) tabTextColorEvaluator.evaluate(currentPositionOffset,
                tabSelectedTextColor, tabTextColor);
        currentTab.setTextColor(currentTabColor);

        int nextTabColor = (Integer) tabTextColorEvaluator.evaluate(currentPositionOffset, tabTextColor,
                tabSelectedTextColor);
        nextTab.setTextColor(nextTabColor);
    }

    canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height, indicatorPaint);

    // draw underline
    canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, underlinePaint);

    // draw divider
    for (int i = 0; i < tabCount - 1; i++) {
        final int tabRight = tabsContainer.getChildAt(i).getRight();
        canvas.drawLine(tabRight, dividerPadding, tabRight, height - dividerPadding, dividerPaint);
    }
}

From source file:net.droidsolutions.droidcharts.core.renderer.AbstractCategoryItemRenderer.java

/**
 * Draws a marker for the range axis./*from   w w  w. jav a  2s.co  m*/
 * 
 * @param g2
 *            the graphics device (not <code>null</code>).
 * @param plot
 *            the plot (not <code>null</code>).
 * @param axis
 *            the range axis (not <code>null</code>).
 * @param marker
 *            the marker to be drawn (not <code>null</code>).
 * @param dataArea
 *            the area inside the axes (not <code>null</code>).
 * 
 * @see #drawDomainMarker(Graphics2D, CategoryPlot, CategoryAxis,
 *      CategoryMarker, Rectangle2D)
 */
public void drawRangeMarker(Canvas g2, CategoryPlot plot, ValueAxis axis, Marker marker, Rectangle2D dataArea) {

    if (marker instanceof ValueMarker) {
        ValueMarker vm = (ValueMarker) marker;
        double value = vm.getValue();
        Range range = axis.getRange();

        if (!range.contains(value)) {
            return;
        }

        PlotOrientation orientation = plot.getOrientation();
        double v = axis.valueToJava2D(value, dataArea, plot.getRangeAxisEdge());
        Line2D line = null;
        if (orientation == PlotOrientation.HORIZONTAL) {
            line = new Line2D.Double(v, dataArea.getMinY(), v, dataArea.getMaxY());
        } else if (orientation == PlotOrientation.VERTICAL) {
            line = new Line2D.Double(dataArea.getMinX(), v, dataArea.getMaxX(), v);
        }

        Paint p = marker.getPaint();
        p.setAlpha(vm.getAlpha());
        p.setStrokeWidth(marker.getStroke());
        g2.drawLine((float) line.getX1(), (float) line.getY1(), (float) line.getX2(), (float) line.getY2(), p);

        String label = marker.getLabel();
        RectangleAnchor anchor = marker.getLabelAnchor();
        if (label != null) {
            Font labelFont = marker.getLabelFont();
            // g2.setFont(labelFont);

            Point2D coordinates = calculateRangeMarkerTextAnchorPoint(g2, orientation, dataArea,
                    line.getBounds2D(), marker.getLabelOffset(), LengthAdjustmentType.EXPAND, anchor);
            TextUtilities.drawAlignedString(label, g2, (float) coordinates.getX(), (float) coordinates.getY(),
                    marker.getLabelTextAnchor(), marker.getLabelPaint());
        }
        // g2.setComposite(savedComposite);
        p.setAlpha(255);
    } else if (marker instanceof IntervalMarker) {
        IntervalMarker im = (IntervalMarker) marker;
        double start = im.getStartValue();
        double end = im.getEndValue();
        Range range = axis.getRange();
        if (!(range.intersects(start, end))) {
            return;
        }

        double start2d = axis.valueToJava2D(start, dataArea, plot.getRangeAxisEdge());
        double end2d = axis.valueToJava2D(end, dataArea, plot.getRangeAxisEdge());
        double low = Math.min(start2d, end2d);
        double high = Math.max(start2d, end2d);

        PlotOrientation orientation = plot.getOrientation();
        Rectangle2D rect = null;
        if (orientation == PlotOrientation.HORIZONTAL) {
            // clip left and right bounds to data area
            low = Math.max(low, dataArea.getMinX());
            high = Math.min(high, dataArea.getMaxX());
            rect = new Rectangle2D.Double(low, dataArea.getMinY(), high - low, dataArea.getHeight());
        } else if (orientation == PlotOrientation.VERTICAL) {
            // clip top and bottom bounds to data area
            low = Math.max(low, dataArea.getMinY());
            high = Math.min(high, dataArea.getMaxY());
            rect = new Rectangle2D.Double(dataArea.getMinX(), low, dataArea.getWidth(), high - low);
        }
        Paint p = marker.getPaint();
        p.setAlpha((int) marker.getAlpha() * 100);// TODO ALPHA
        p.setStyle(Paint.Style.FILL);

        g2.drawRect((float) rect.getMinX(), (float) rect.getMinY(), (float) rect.getMaxX(),
                (float) rect.getMinY(), p);

        // now draw the outlines, if visible...
        if (im.getOutlinePaint() != null && im.getOutlineStroke() != 0.0f) {
            if (orientation == PlotOrientation.VERTICAL) {
                Line2D line = new Line2D.Double();
                double x0 = dataArea.getMinX();
                double x1 = dataArea.getMaxX();
                Paint paint = im.getOutlinePaint();
                paint.setStrokeWidth(im.getOutlineStroke());

                if (range.contains(start)) {
                    line.setLine(x0, start2d, x1, start2d);
                    g2.drawLine((float) line.getX1(), (float) line.getY1(), (float) line.getX2(),
                            (float) line.getY2(), paint);
                }
                if (range.contains(end)) {
                    line.setLine(x0, end2d, x1, end2d);
                    g2.drawLine((float) line.getX1(), (float) line.getY1(), (float) line.getX2(),
                            (float) line.getY2(), paint);
                }
            } else { // PlotOrientation.HORIZONTAL
                Line2D line = new Line2D.Double();
                double y0 = dataArea.getMinY();
                double y1 = dataArea.getMaxY();
                Paint paint = im.getOutlinePaint();
                paint.setStrokeWidth(im.getOutlineStroke());
                if (range.contains(start)) {
                    line.setLine(start2d, y0, start2d, y1);
                    g2.drawLine((float) line.getX1(), (float) line.getY1(), (float) line.getX2(),
                            (float) line.getY2(), paint);
                }
                if (range.contains(end)) {
                    line.setLine(end2d, y0, end2d, y1);
                    g2.drawLine((float) line.getX1(), (float) line.getY1(), (float) line.getX2(),
                            (float) line.getY2(), paint);
                }
            }
        }

        String label = marker.getLabel();
        RectangleAnchor anchor = marker.getLabelAnchor();
        if (label != null) {
            Font labelFont = marker.getLabelFont();
            // g2.setFont(labelFont);
            Paint pp = marker.getLabelPaint();
            // g2.setPaint(marker.getLabelPaint());
            Point2D coordinates = calculateRangeMarkerTextAnchorPoint(g2, orientation, dataArea, rect,
                    marker.getLabelOffset(), marker.getLabelOffsetType(), anchor);
            TextUtilities.drawAlignedString(label, g2, (float) coordinates.getX(), (float) coordinates.getY(),
                    marker.getLabelTextAnchor(), pp);
        }
        p.setAlpha(255);
    }
}

From source file:com.cssweb.android.view.KlineMini.java

private void drawMA(Canvas canvas, JSONObject quoteData, int begin, int count, double shapeWidth,
        double spaceWidth, double highPrice, double lowPrice, double highVolume, int actualDataLen)
        throws JSONException {
    if (quoteData == null)
        return;/*from  w  ww  .  j a  v  a2 s .co m*/

    int startX = klineX;
    int startY = klineY;
    double ma5Height = 0;
    double ma5x = 0;
    double ma5y = 0;
    double ma5 = 0;

    paint.setColor(GlobalColor.colorM5);
    for (int i = begin; i < (begin + count); i++) {
        //klineX = 0;

        ma5 = quoteData.getJSONArray("MA").getJSONArray(i).getDouble(1);

        if ((i - begin) == 0) {
            ma5x = startX + spaceWidth + shapeWidth / 2;
            ma5Height = (int) ((ma5 - lowPrice) * scale);
            ma5y = axisLabelHeight + klineHeight - ma5Height;
        } else {
            if (quoteData.getJSONArray("MA").getJSONArray(i - 1).getDouble(1) == 0) {
                ma5x = ma5x + spaceWidth + shapeWidth;
                ma5Height = (ma5 - lowPrice) * scale;
                ma5y = startY + klineHeight - ma5Height;
            } else {
                canvas.drawLine((float) ma5x, (float) ma5y, (float) (ma5x + spaceWidth + shapeWidth),
                        (float) (axisLabelHeight + klineHeight - (ma5 - lowPrice) * scale), paint);
                ma5x = ma5x + spaceWidth + shapeWidth;
                ma5Height = (ma5 - lowPrice) * scale;
                ma5y = startY + klineHeight - ma5Height;
            }
        }

    } // end for             

    double ma10x = 0;
    double ma10y = 0;
    double ma10Height = 0;
    double ma10 = 0;

    paint.setColor(GlobalColor.colorM10);

    for (int i = begin; i < (begin + count); i++) {
        //klineX = 0;

        ma10 = quoteData.getJSONArray("MA").getJSONArray(i).getDouble(2);

        if ((i - begin) == 0) {
            ma10x = startX + spaceWidth + shapeWidth / 2;
            ma10Height = (ma10 - lowPrice) * scale;
            ma10y = startY + klineHeight - ma10Height;
        } else {
            if (quoteData.getJSONArray("MA").getJSONArray(i - 1).getDouble(2) == 0) {
                ma10x = ma10x + spaceWidth + shapeWidth;
                ma10Height = (ma10 - lowPrice) * scale;
                ma10y = startY + klineHeight - ma10Height;
            } else {
                canvas.drawLine((float) ma10x, (float) ma10y, (float) (ma10x + spaceWidth + shapeWidth),
                        (float) (axisLabelHeight + klineHeight - (ma10 - lowPrice) * scale), paint);
                ma10x = ma10x + spaceWidth + shapeWidth;
                ma10Height = (ma10 - lowPrice) * scale;
                ma10y = startY + klineHeight - ma10Height;
            }
        }
    } // end for          

    double ma20x = 0;
    double ma20y = 0;
    double ma20Height = 0;
    double ma20 = 0;

    //paint.setColor(GlobalColor.colorM20);
    paint.setARGB(255, 255, 0, 255);
    for (int i = begin; i < (begin + count); i++) {
        //klineX = 0;

        ma20 = quoteData.getJSONArray("MA").getJSONArray(i).getDouble(3);

        if ((i - begin) == 0) {
            ma20x = startX + spaceWidth + shapeWidth / 2;
            ma20Height = (ma20 - lowPrice) * scale;
            ma20y = startY + klineHeight - ma20Height;
        } else {
            if (quoteData.getJSONArray("MA").getJSONArray(i - 1).getDouble(3) == 0) {
                ma20x = ma20x + spaceWidth + shapeWidth;
                ma20Height = (ma20 - lowPrice) * scale;
                ma20y = startY + klineHeight - ma20Height;
            } else {
                canvas.drawLine((float) ma20x, (float) ma20y, (float) (ma20x + spaceWidth + shapeWidth),
                        (float) (axisLabelHeight + klineHeight - (ma20 - lowPrice) * scale), paint);
                ma20x = ma20x + spaceWidth + shapeWidth;
                ma20Height = (ma20 - lowPrice) * scale;
                ma20y = startY + klineHeight - ma20Height;
            }
        }
    } // end for                                  

    double ma60x = 0;
    double ma60y = 0;
    double ma60Height = 0;
    double ma60 = 0;

    paint.setColor(GlobalColor.colorM60);
    for (int i = begin; i < (begin + count); i++) {
        //klineX = 0;

        ma60 = quoteData.getJSONArray("MA").getJSONArray(i).getDouble(4);

        if ((i - begin) == 0) {
            ma60x = startX + spaceWidth + shapeWidth / 2;
            ma60Height = (ma60 - lowPrice) * scale;
            ma60y = startY + klineHeight - ma60Height;
        } else {
            if (quoteData.getJSONArray("MA").getJSONArray(i - 1).getDouble(4) == 0) {
                ma60x = ma60x + spaceWidth + shapeWidth;
                ma60Height = (ma60 - lowPrice) * scale;
                ma60y = startY + klineHeight - ma60Height;
            } else {
                canvas.drawLine((float) ma60x, (float) ma60y, (float) (ma60x + spaceWidth + shapeWidth),
                        (float) (axisLabelHeight + klineHeight - (ma60 - lowPrice) * scale), paint);
                ma60x = ma60x + spaceWidth + shapeWidth;
                ma60Height = (ma60 - lowPrice) * scale;
                ma60y = startY + klineHeight - ma60Height;
            }
        }
    } // end for          
}

From source file:zz.itcast.jiujinhui.activity.PagerSlidingTabStrip.java

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

    if (isInEditMode() || tabCount == 0) {
        return;/*from  w w  w. jav a2s .  c o m*/
    }

    final int height = getHeight();

    // draw underline
    rectPaint.setColor(underlineColor);
    canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);

    // draw indicator line
    rectPaint.setColor(indicatorColor);

    // default: line below current tab
    View currentTab = tabsContainer.getChildAt(currentPosition);
    float lineLeft = currentTab.getLeft();
    float lineRight = currentTab.getRight();

    // if there is an offset, start interpolating left and right coordinates between current and next tab
    if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {

        View nextTab = tabsContainer.getChildAt(currentPosition + 1);
        final float nextTabLeft = nextTab.getLeft();
        final float nextTabRight = nextTab.getRight();

        lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
        lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);
    }

    if (maxLineWidth != 0 && lineRight - lineLeft > maxLineWidth) {

        canvas.drawRect(lineLeft + (lineRight - lineLeft - maxLineWidth) / 2, height - indicatorHeight,
                lineRight - (lineRight - lineLeft - maxLineWidth) / 2, height - underlineMarginTop, rectPaint);

    } else {

        canvas.drawRect(lineLeft, height - indicatorHeight, lineRight - underlineMarginTop, height, rectPaint);
    }

    // draw divider

    dividerPaint.setColor(dividerColor);
    for (int i = 0; i < tabCount - 1; i++) {
        View tab = tabsContainer.getChildAt(i);
        canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
    }
}

From source file:com.cs.widget.tab.PagerSlidingTabStrip.java

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

    if (isInEditMode() || tabCount == 0) {
        return;/* w  w  w . ja  va2s. c o  m*/
    }

    final int height = getHeight();

    // draw indicator line

    rectPaint.setColor(indicatorColor);

    // default: line below current tab
    View currentTab = tabsContainer.getChildAt(currentPosition);
    float lineLeft = currentTab.getLeft();
    float lineRight = currentTab.getRight();

    // if there is an offset, start interpolating left and right coordinates between current and next tab
    if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {

        View nextTab = tabsContainer.getChildAt(currentPosition + 1);
        final float nextTabLeft = nextTab.getLeft();
        final float nextTabRight = nextTab.getRight();

        lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
        lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);
    }

    if (lineGravity == 1) {//tab
        canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height, rectPaint);

        // draw underline
        rectPaint.setColor(underlineColor);
        canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);

    } else {//tab
        canvas.drawRect(lineLeft, 0, lineRight, indicatorHeight, rectPaint);

        // draw underline
        rectPaint.setColor(underlineColor);
        canvas.drawRect(0, 0, tabsContainer.getWidth(), underlineHeight, rectPaint);
    }

    // draw divider

    dividerPaint.setColor(dividerColor);
    for (int i = 0; i < tabCount - 1; i++) {
        View tab = tabsContainer.getChildAt(i);
        canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
    }
}

From source file:com.itheima.oschina.ui.view.PagerSlidingTab.java

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

    if (isInEditMode() || tabCount == 0) {
        return;//  ww  w.j ava2s.  co  m
    }

    final int height = getHeight();

    // draw indicator line

    rectPaint.setColor(indicatorColor);

    // default: line below current tab
    View currentTab = tabsContainer.getChildAt(currentPosition);
    float lineLeft = currentTab.getLeft();
    float lineRight = currentTab.getRight();

    // if there is an offset, start interpolating left and right coordinates between current and next tab
    if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {

        View nextTab = tabsContainer.getChildAt(currentPosition + 1);
        final float nextTabLeft = nextTab.getLeft();
        final float nextTabRight = nextTab.getRight();

        lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
        lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);
    }

    canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height, rectPaint);
    //      canvas.drawRect(lineLeft, 0, lineRight, height, rectPaint);
    //
    //      canvas.drawRect(lineLeft, 0, lineRight, indicatorHeight, rectPaint);
    //
    //      canvas.drawRect(lineLeft, height/2-indicatorHeight/2, lineRight, height/2+indicatorHeight/2, rectPaint);

    // draw underline

    rectPaint.setColor(underlineColor);
    canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);

    // draw divider

    dividerPaint.setColor(dividerColor);
    for (int i = 0; i < tabCount - 1; i++) {
        View tab = tabsContainer.getChildAt(i);
        canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
    }
}