Example usage for android.graphics LinearGradient LinearGradient

Introduction

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

Prototype

public LinearGradient(float x0, float y0, float x1, float y1, @ColorInt int color0, @ColorInt int color1,
        @NonNull TileMode tile) 

Source Link

Document

Create a shader that draws a linear gradient along a line.

Usage

From source file:jp.tkgktyk.xposed.forcetouchdetector.app.util.fab.CircularBorderDrawable.java

/**
 * Creates a vertical {@link LinearGradient}
 * @return/*from   w w  w . j av  a 2s. c  o m*/
 */
private Shader createGradientShader() {
    final Rect rect = mRect;
    copyBounds(rect);

    final float borderRatio = mBorderWidth / rect.height();

    final int[] colors = new int[6];
    colors[0] = ColorUtils.compositeColors(mTopOuterStrokeColor, mTintColor);
    colors[1] = ColorUtils.compositeColors(mTopInnerStrokeColor, mTintColor);
    colors[2] = ColorUtils.compositeColors(ColorUtils.setAlphaComponent(mTopInnerStrokeColor, 0), mTintColor);
    colors[3] = ColorUtils.compositeColors(ColorUtils.setAlphaComponent(mBottomInnerStrokeColor, 0),
            mTintColor);
    colors[4] = ColorUtils.compositeColors(mBottomInnerStrokeColor, mTintColor);
    colors[5] = ColorUtils.compositeColors(mBottomOuterStrokeColor, mTintColor);

    final float[] positions = new float[6];
    positions[0] = 0f;
    positions[1] = borderRatio;
    positions[2] = 0.5f;
    positions[3] = 0.5f;
    positions[4] = 1f - borderRatio;
    positions[5] = 1f;

    return new LinearGradient(0, rect.top, 0, rect.bottom, colors, positions, Shader.TileMode.CLAMP);
}

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From source file:project.pamela.slambench.fragments.AccuracyPlot.java

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    // Replace LinearLayout by the type of the root element of the layout you're trying to load
    LinearLayout llLayout = (LinearLayout) inflater.inflate(R.layout.fragment_plot, container, false);

    // Retrieve bench number
    Intent mIntent = super.getActivity().getIntent();
    final int intValue = mIntent.getIntExtra(ResultActivity.SELECTED_TEST_TAG, 0);
    SLAMResult value = SLAMBenchApplication.getResults().get(intValue);

    if (!value.isFinished()) {
        Log.e(SLAMBenchApplication.LOG_TAG,
                this.getResources().getString(R.string.debug_proposed_value_not_valid));
        return llLayout;
    }//from w w w .  j av  a 2  s .  c  o m

    // initialize our XYPlot reference:
    XYPlot plot = (XYPlot) llLayout.findViewById(R.id.mySimpleXYPlot);

    plot.setTitle(value.test.name);
    plot.setDomainLabel(this.getResources().getString(R.string.legend_frame_number));
    plot.setRangeLabel(this.getResources().getString(R.string.legend_ate));
    plot.setBackgroundColor(Color.WHITE);
    plot.getGraphWidget().getBackgroundPaint().setColor(Color.WHITE);
    plot.getGraphWidget().getGridBackgroundPaint().setColor(Color.WHITE);

    plot.getGraphWidget().getDomainLabelPaint().setColor(Color.BLACK);
    plot.getGraphWidget().getRangeLabelPaint().setColor(Color.BLACK);

    plot.getGraphWidget().getDomainOriginLabelPaint().setColor(Color.BLACK);
    plot.getGraphWidget().getDomainOriginLinePaint().setColor(Color.BLACK);
    plot.getGraphWidget().getRangeOriginLinePaint().setColor(Color.BLACK);

    plot.getGraphWidget().setRangeValueFormat(new DecimalFormat("#####.##"));

    int border = 60;
    int legendsize = 110;

    plot.getGraphWidget().position(border, XLayoutStyle.ABSOLUTE_FROM_LEFT, border,
            YLayoutStyle.ABSOLUTE_FROM_BOTTOM, AnchorPosition.LEFT_BOTTOM);
    plot.getGraphWidget()
            .setSize(new SizeMetrics(border + legendsize, SizeLayoutType.FILL, border, SizeLayoutType.FILL));

    // reduce the number of range labels
    plot.setDomainStep(XYStepMode.INCREMENT_BY_VAL, 10);
    plot.setDomainValueFormat(new DecimalFormat("#"));
    plot.setRangeStep(XYStepMode.SUBDIVIDE, 10);

    plot.getLayoutManager().remove(plot.getTitleWidget());

    // Set legend
    plot.getLegendWidget().setTableModel(new DynamicTableModel(4, 2));

    Paint bgPaint = new Paint();
    bgPaint.setColor(Color.BLACK);
    bgPaint.setStyle(Paint.Style.FILL);
    bgPaint.setAlpha(140);

    plot.getLegendWidget().setBackgroundPaint(bgPaint);

    plot.getLegendWidget()
            .setSize(new SizeMetrics(legendsize, SizeLayoutType.ABSOLUTE, 0, SizeLayoutType.FILL));

    plot.getLegendWidget().position(0, XLayoutStyle.ABSOLUTE_FROM_RIGHT, 0, YLayoutStyle.ABSOLUTE_FROM_TOP,
            AnchorPosition.RIGHT_TOP);

    plot.getDomainLabelWidget().position(0, XLayoutStyle.ABSOLUTE_FROM_CENTER, 0,
            YLayoutStyle.RELATIVE_TO_BOTTOM, AnchorPosition.BOTTOM_MIDDLE);

    int fillcolor = Color.rgb(255, 213, 226);
    int strokecolor = Color.rgb(225, 99, 70);

    Double accuracyNumbers[] = value.getATEList();
    XYSeries series = new SimpleXYSeries(Arrays.asList(accuracyNumbers), SimpleXYSeries.ArrayFormat.Y_VALS_ONLY,
            this.getResources().getString(R.string.legend_ate));
    LineAndPointFormatter seriesFormat = new LineAndPointFormatter(strokecolor, strokecolor, null, null);

    Paint lineFill = new Paint();
    lineFill.setAlpha(200);
    DisplayMetrics metrics = new DisplayMetrics();
    super.getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);
    lineFill.setShader(
            new LinearGradient(0, 0, 0, metrics.heightPixels, Color.WHITE, fillcolor, Shader.TileMode.MIRROR));
    seriesFormat.setPointLabeler(new PointLabeler() {
        @Override
        public String getLabel(XYSeries series, int index) {
            return "o";
        }
    });
    seriesFormat.setFillPaint(lineFill);
    plot.addSeries(series, seriesFormat);

    // same as above
    LineAndPointFormatter lineFormat = new LineAndPointFormatter(Color.BLACK, null, null, null);
    //change the line width
    Paint paint = lineFormat.getLinePaint();
    paint.setStrokeWidth(5);
    lineFormat.setLinePaint(paint);

    if (SLAMBenchApplication.getBenchmark() != null) {
        Number[] line = { 0, SLAMBenchApplication.getBenchmark().getMaxAccuracyError(),
                value.test.dataset.getFrameCount() - 1,
                SLAMBenchApplication.getBenchmark().getMaxAccuracyError() };
        XYSeries expected = new SimpleXYSeries(Arrays.asList(line),
                SimpleXYSeries.ArrayFormat.XY_VALS_INTERLEAVED,
                getResources().getString(R.string.legend_error_limit));
        plot.addSeries(expected, lineFormat);
    }

    plot.redraw();

    plot.calculateMinMaxVals();
    PointF maxXY = new PointF(plot.getCalculatedMaxX().floatValue(), plot.getCalculatedMaxY().floatValue());

    plot.setDomainBoundaries(0, value.test.dataset.getFrameCount() - 1, BoundaryMode.FIXED);
    plot.setRangeBoundaries(0, maxXY.y * 1.2f, BoundaryMode.FIXED);

    plot.redraw();

    return llLayout;
}

---

From source file:com.wareninja.opensource.gravatar4android.common.Utils.java

public static Bitmap getBitmapWithReflection(Bitmap originalImage) {

    //The gap we want between the reflection and the original image
    final int reflectionGap = 4;

    int width = originalImage.getWidth();
    int height = originalImage.getHeight();

    //This will not scale but will flip on the Y axis
    Matrix matrix = new Matrix();
    matrix.preScale(1, -1);// w w  w  .  j av  a  2  s  .  c  o m

    //Create a Bitmap with the flip matrix applied to it.
    //We only want the bottom half of the image
    Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0, height / 2, width, height / 2, matrix,
            false);

    //Create a new bitmap with same width but taller to fit reflection
    Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height / 2), Config.ARGB_8888);

    //Create a new Canvas with the bitmap that's big enough for
    //the image plus gap plus reflection
    Canvas canvas = new Canvas(bitmapWithReflection);
    //Draw in the original image
    canvas.drawBitmap(originalImage, 0, 0, null);
    //Draw in the gap
    Paint deafaultPaint = new Paint();
    canvas.drawRect(0, height, width, height + reflectionGap, deafaultPaint);
    //Draw in the reflection
    canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);

    //Create a shader that is a linear gradient that covers the reflection
    Paint paint = new Paint();
    LinearGradient shader = new LinearGradient(0, originalImage.getHeight(), 0,
            bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);
    //Set the paint to use this shader (linear gradient)
    paint.setShader(shader);
    //Set the Transfer mode to be porter duff and destination in
    paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
    //Draw a rectangle using the paint with our linear gradient
    canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint);

    return bitmapWithReflection;
}

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From source file:com.cooltechworks.views.ScratchImageView.java

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(w, h, oldw, oldh);
    mScratchBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
    mCanvas = new Canvas(mScratchBitmap);

    Rect rect = new Rect(0, 0, mScratchBitmap.getWidth(), mScratchBitmap.getHeight());
    mDrawable.setBounds(rect);// w  ww  . ja v  a  2  s .  c om

    int startGradientColor = ContextCompat.getColor(getContext(), R.color.scratch_start_gradient);
    int endGradientColor = ContextCompat.getColor(getContext(), R.color.scratch_end_gradient);

    mGradientBgPaint.setShader(new LinearGradient(0, 0, 0, getHeight(), startGradientColor, endGradientColor,
            Shader.TileMode.MIRROR));

    mCanvas.drawRect(rect, mGradientBgPaint);
    mDrawable.draw(mCanvas);
}

---

From source file:project.pamela.slambench.fragments.TemperaturePlot.java

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    // Replace LinearLayout by the type of the root element of the layout you're trying to load
    LinearLayout llLayout = (LinearLayout) inflater.inflate(R.layout.fragment_plot, container, false);

    // Retrieve bench number
    Intent mIntent = super.getActivity().getIntent();
    final int intValue = mIntent.getIntExtra(ResultActivity.SELECTED_TEST_TAG, 0);
    SLAMResult value = SLAMBenchApplication.getResults().get(intValue);

    if (!value.isFinished()) {
        Log.e(SLAMBenchApplication.LOG_TAG,
                this.getResources().getString(R.string.debug_proposed_value_not_valid));
        return llLayout;
    }//from  w  ww  . j  av  a  2s. co  m

    // initialize our XYPlot reference:
    XYPlot plot = (XYPlot) llLayout.findViewById(R.id.mySimpleXYPlot);

    plot.setBackgroundColor(Color.WHITE);
    plot.setTitle(value.test.name);
    plot.setDomainLabel(this.getResources().getString(R.string.legend_frame_number));
    plot.setRangeLabel(this.getResources().getString(R.string.legend_degrees));
    plot.setBackgroundColor(Color.WHITE);
    plot.getGraphWidget().getBackgroundPaint().setColor(Color.WHITE);
    plot.getGraphWidget().getGridBackgroundPaint().setColor(Color.WHITE);

    plot.getGraphWidget().getDomainLabelPaint().setColor(Color.BLACK);
    plot.getGraphWidget().getRangeLabelPaint().setColor(Color.BLACK);

    plot.getGraphWidget().getDomainOriginLabelPaint().setColor(Color.BLACK);
    plot.getGraphWidget().getDomainOriginLinePaint().setColor(Color.BLACK);
    plot.getGraphWidget().getRangeOriginLinePaint().setColor(Color.BLACK);

    plot.getGraphWidget().setRangeValueFormat(new DecimalFormat("#####.##"));

    int border = 60;
    int legendsize = 110;

    plot.getGraphWidget().position(border, XLayoutStyle.ABSOLUTE_FROM_LEFT, border,
            YLayoutStyle.ABSOLUTE_FROM_BOTTOM, AnchorPosition.LEFT_BOTTOM);
    plot.getGraphWidget()
            .setSize(new SizeMetrics(border + legendsize, SizeLayoutType.FILL, border, SizeLayoutType.FILL));

    // reduce the number of range labels
    plot.setDomainStep(XYStepMode.INCREMENT_BY_VAL, 10);
    plot.setDomainValueFormat(new DecimalFormat("#"));
    plot.setRangeStep(XYStepMode.SUBDIVIDE, 10);

    //Remove legend
    //plot.getLayoutManager().remove(plot.getLegendWidget());
    //plot.getLayoutManager().remove(plot.getDomainLabelWidget());
    //plot.getLayoutManager().remove(plot.getRangeLabelWidget());
    plot.getLayoutManager().remove(plot.getTitleWidget());

    // Set legend
    plot.getLegendWidget().setTableModel(new DynamicTableModel(4, 2));

    Paint bgPaint = new Paint();
    bgPaint.setColor(Color.BLACK);
    bgPaint.setStyle(Paint.Style.FILL);
    bgPaint.setAlpha(140);

    plot.getLegendWidget().setBackgroundPaint(bgPaint);

    plot.getLegendWidget()
            .setSize(new SizeMetrics(legendsize, SizeLayoutType.ABSOLUTE, 0, SizeLayoutType.FILL));

    plot.getLegendWidget().position(0, XLayoutStyle.ABSOLUTE_FROM_RIGHT, 0, YLayoutStyle.ABSOLUTE_FROM_TOP,
            AnchorPosition.RIGHT_TOP);

    plot.getDomainLabelWidget().position(0, XLayoutStyle.ABSOLUTE_FROM_CENTER, 0,
            YLayoutStyle.RELATIVE_TO_BOTTOM, AnchorPosition.BOTTOM_MIDDLE);

    int strokecolor = Color.rgb(67, 137, 192);
    int fillcolor = Color.rgb(213, 229, 255);

    Double temperatureNumbers[] = value.gettemperatureList();
    XYSeries series = new SimpleXYSeries(Arrays.asList(temperatureNumbers),
            SimpleXYSeries.ArrayFormat.Y_VALS_ONLY, this.getResources().getString(R.string.legend_degrees));
    LineAndPointFormatter seriesFormat = new LineAndPointFormatter(strokecolor, strokecolor, null, null);

    Paint lineFill = new Paint();
    lineFill.setAlpha(200);
    DisplayMetrics metrics = new DisplayMetrics();
    super.getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);
    lineFill.setShader(
            new LinearGradient(0, 0, 0, metrics.heightPixels, Color.WHITE, fillcolor, Shader.TileMode.MIRROR));
    seriesFormat.setPointLabeler(new PointLabeler() {
        @Override
        public String getLabel(XYSeries series, int index) {
            return "o";
        }
    });
    seriesFormat.setFillPaint(lineFill);
    plot.addSeries(series, seriesFormat);

    plot.redraw();

    plot.calculateMinMaxVals();
    PointF minXY = new PointF(plot.getCalculatedMinX().floatValue(), plot.getCalculatedMinY().floatValue());
    PointF maxXY = new PointF(plot.getCalculatedMaxX().floatValue(), plot.getCalculatedMaxY().floatValue());

    plot.setDomainBoundaries(0, value.test.dataset.getFrameCount() - 1, BoundaryMode.FIXED);
    plot.setRangeBoundaries(Math.min(0, minXY.y), maxXY.y * 1.2f, BoundaryMode.FIXED);

    plot.redraw();

    return llLayout;
}

---

From source file:project.pamela.slambench.fragments.PowerPlot.java

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    // Replace LinearLayout by the type of the root element of the layout you're trying to load
    LinearLayout llLayout = (LinearLayout) inflater.inflate(R.layout.fragment_plot, container, false);

    // Retrieve bench number
    Intent mIntent = super.getActivity().getIntent();
    final int intValue = mIntent.getIntExtra(ResultActivity.SELECTED_TEST_TAG, 0);
    SLAMResult value = SLAMBenchApplication.getResults().get(intValue);

    if (!value.isFinished()) {
        Log.e(SLAMBenchApplication.LOG_TAG,
                this.getResources().getString(R.string.debug_proposed_value_not_valid));
        return llLayout;
    }/*from w  ww .j  av  a 2s  . c  o  m*/

    // initialize our XYPlot reference:
    XYPlot plot = (XYPlot) llLayout.findViewById(R.id.mySimpleXYPlot);

    plot.setTitle(value.test.name);
    plot.setDomainLabel(this.getResources().getString(R.string.legend_frame_number));
    plot.setRangeLabel(this.getResources().getString(R.string.legend_power));
    plot.setBackgroundColor(Color.WHITE);
    plot.getBorderPaint().setColor(Color.WHITE);

    plot.getGraphWidget().getBackgroundPaint().setColor(Color.WHITE);
    plot.getGraphWidget().getGridBackgroundPaint().setColor(Color.WHITE);

    plot.getGraphWidget().getDomainLabelPaint().setColor(Color.BLACK);
    plot.getGraphWidget().getRangeLabelPaint().setColor(Color.BLACK);

    plot.getGraphWidget().getDomainOriginLabelPaint().setColor(Color.BLACK);
    plot.getGraphWidget().getDomainOriginLinePaint().setColor(Color.BLACK);
    plot.getGraphWidget().getRangeOriginLinePaint().setColor(Color.BLACK);

    plot.getGraphWidget().setRangeValueFormat(new DecimalFormat("#####.##"));

    int border = 60;
    int legendsize = 110;

    plot.getGraphWidget().position(border, XLayoutStyle.ABSOLUTE_FROM_LEFT, border,
            YLayoutStyle.ABSOLUTE_FROM_BOTTOM, AnchorPosition.LEFT_BOTTOM);
    plot.getGraphWidget()
            .setSize(new SizeMetrics(border + legendsize, SizeLayoutType.FILL, border, SizeLayoutType.FILL));

    // reduce the number of range labels
    plot.setDomainStep(XYStepMode.INCREMENT_BY_VAL, 10);
    plot.setDomainValueFormat(new DecimalFormat("#"));
    plot.setRangeStep(XYStepMode.SUBDIVIDE, 10);

    //Remove legend
    //plot.getLayoutManager().remove(plot.getLegendWidget());
    //plot.getLayoutManager().remove(plot.getDomainLabelWidget());
    //plot.getLayoutManager().remove(plot.getRangeLabelWidget());
    plot.getLayoutManager().remove(plot.getTitleWidget());

    // Set legend
    plot.getLegendWidget().setTableModel(new DynamicTableModel(4, 2));

    Paint bgPaint = new Paint();
    bgPaint.setColor(Color.BLACK);
    bgPaint.setStyle(Paint.Style.FILL);
    bgPaint.setAlpha(140);

    plot.getLegendWidget().setBackgroundPaint(bgPaint);

    plot.getLegendWidget()
            .setSize(new SizeMetrics(legendsize, SizeLayoutType.ABSOLUTE, 0, SizeLayoutType.FILL));

    plot.getLegendWidget().position(0, XLayoutStyle.ABSOLUTE_FROM_RIGHT, 0, YLayoutStyle.ABSOLUTE_FROM_TOP,
            AnchorPosition.RIGHT_TOP);

    plot.getDomainLabelWidget().position(0, XLayoutStyle.ABSOLUTE_FROM_CENTER, 0,
            YLayoutStyle.RELATIVE_TO_BOTTOM, AnchorPosition.BOTTOM_MIDDLE);

    int strokecolor = Color.rgb(91, 255, 159);
    int fillcolor = Color.rgb(91, 255, 184);

    Double powerNumbers[] = value.getPowerList();
    for (int i = 0; i < value.test.dataset.getFrameCount(); i++) {
        powerNumbers[i] = powerNumbers[i] / -1000;
    }
    XYSeries series = new SimpleXYSeries(Arrays.asList(powerNumbers), SimpleXYSeries.ArrayFormat.Y_VALS_ONLY,
            this.getResources().getString(R.string.legend_power));
    LineAndPointFormatter seriesFormat = new LineAndPointFormatter(strokecolor, strokecolor, null, null);

    Paint lineFill = new Paint();
    lineFill.setAlpha(200);
    DisplayMetrics metrics = new DisplayMetrics();
    super.getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);
    lineFill.setShader(
            new LinearGradient(0, 0, 0, metrics.heightPixels, Color.WHITE, fillcolor, Shader.TileMode.MIRROR));
    seriesFormat.setPointLabeler(new PointLabeler() {
        @Override
        public String getLabel(XYSeries series, int index) {
            return "o";
        }
    });
    seriesFormat.setFillPaint(lineFill);
    plot.addSeries(series, seriesFormat);

    // same as above
    LineAndPointFormatter lineFormat = new LineAndPointFormatter(Color.BLACK, null, null, null);
    //change the line width
    Paint paint = lineFormat.getLinePaint();
    paint.setStrokeWidth(5);
    lineFormat.setLinePaint(paint);

    Number[] line = { 0, 3, value.test.dataset.getFrameCount() - 1, 3 };
    XYSeries expected = new SimpleXYSeries(Arrays.asList(line), SimpleXYSeries.ArrayFormat.XY_VALS_INTERLEAVED,
            getResources().getString(R.string.legend_power_limit));
    plot.addSeries(expected, lineFormat);

    plot.redraw();

    plot.calculateMinMaxVals();
    PointF minXY = new PointF(plot.getCalculatedMinX().floatValue(), plot.getCalculatedMinY().floatValue());
    PointF maxXY = new PointF(plot.getCalculatedMaxX().floatValue(), plot.getCalculatedMaxY().floatValue());

    plot.setDomainBoundaries(0, value.test.dataset.getFrameCount() - 1, BoundaryMode.FIXED);
    plot.setRangeBoundaries(Math.min(0, minXY.y), maxXY.y * 1.2f, BoundaryMode.FIXED);

    plot.redraw();

    return llLayout;
}

---

From source file:com.shollmann.igcparser.ui.activity.FlightPreviewActivity.java

public PaintDrawable getColorScala() {
    ShapeDrawable.ShaderFactory shaderFactory = new ShapeDrawable.ShaderFactory() {
        @Override//from  ww w . j  a va  2s. c o m
        public Shader resize(int width, int height) {
            LinearGradient linearGradient = new LinearGradient(width, height, 0, 0,
                    new int[] { getResources().getColor(R.color.altitude_0_100),
                            getResources().getColor(R.color.altitude_100_300),
                            getResources().getColor(R.color.altitude_300_500),
                            getResources().getColor(R.color.altitude_500_1000),
                            getResources().getColor(R.color.altitude_1000_1500),
                            getResources().getColor(R.color.altitude_1500_2000),
                            getResources().getColor(R.color.altitude_2000_2500),
                            getResources().getColor(R.color.altitude_more_than_2500) },
                    new float[] { 0, 0.07f, 0.14f, 0.28f, 0.42f, 0.56f, 0.7f, 0.84f }, Shader.TileMode.REPEAT);
            return linearGradient;
        }
    };

    PaintDrawable paint = new PaintDrawable();
    paint.setShape(new RectShape());
    paint.setShaderFactory(shaderFactory);

    return paint;
}

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From source file:github.daneren2005.dsub.util.ImageLoader.java

private Bitmap createUnknownImage(int size, int primaryColor, String topText, String bottomText) {
    Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);

    Paint color = new Paint();
    color.setColor(primaryColor);//from   www . j av  a2  s  .c  o  m
    canvas.drawRect(0, 0, size, size * 2.0f / 3.0f, color);

    color.setShader(new LinearGradient(0, 0, 0, size / 3.0f, Color.rgb(82, 82, 82), Color.BLACK,
            Shader.TileMode.MIRROR));
    canvas.drawRect(0, size * 2.0f / 3.0f, size, size, color);

    if (topText != null || bottomText != null) {
        Paint font = new Paint();
        font.setFlags(Paint.ANTI_ALIAS_FLAG);
        font.setColor(Color.WHITE);
        font.setTextSize(3.0f + size * 0.07f);

        if (topText != null) {
            canvas.drawText(topText, size * 0.05f, size * 0.6f, font);
        }

        if (bottomText != null) {
            canvas.drawText(bottomText, size * 0.05f, size * 0.8f, font);
        }
    }

    return bitmap;
}

---

From source file:project.pamela.slambench.fragments.FrequencyPlot.java

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    // Replace LinearLayout by the type of the root element of the layout you're trying to load
    LinearLayout llLayout = (LinearLayout) inflater.inflate(R.layout.fragment_plot, container, false);

    // Retrieve bench number
    Intent mIntent = super.getActivity().getIntent();
    final int intValue = mIntent.getIntExtra(ResultActivity.SELECTED_TEST_TAG, 0);
    SLAMResult value = SLAMBenchApplication.getResults().get(intValue);

    if (!value.isFinished()) {
        Log.e(SLAMBenchApplication.LOG_TAG,
                this.getResources().getString(R.string.debug_proposed_value_not_valid));
        return llLayout;
    }/*from ww w.j a va2s. c o  m*/

    // initialize our XYPlot reference:
    XYPlot plot = (XYPlot) llLayout.findViewById(R.id.mySimpleXYPlot);

    plot.setBackgroundColor(Color.WHITE);
    plot.setTitle(value.test.name);
    plot.setDomainLabel(this.getResources().getString(R.string.legend_frame_number));
    plot.setRangeLabel(this.getResources().getString(R.string.frequency_domain));
    plot.setBackgroundColor(Color.WHITE);
    plot.getGraphWidget().getBackgroundPaint().setColor(Color.WHITE);
    plot.getGraphWidget().getGridBackgroundPaint().setColor(Color.WHITE);

    plot.getGraphWidget().getDomainLabelPaint().setColor(Color.BLACK);
    plot.getGraphWidget().getRangeLabelPaint().setColor(Color.BLACK);

    plot.getGraphWidget().getDomainOriginLabelPaint().setColor(Color.BLACK);
    plot.getGraphWidget().getDomainOriginLinePaint().setColor(Color.BLACK);
    plot.getGraphWidget().getRangeOriginLinePaint().setColor(Color.BLACK);

    plot.getGraphWidget().setRangeValueFormat(new DecimalFormat("#####.##"));

    int border = 60;
    int legendsize = 110;

    plot.getGraphWidget().position(border, XLayoutStyle.ABSOLUTE_FROM_LEFT, border,
            YLayoutStyle.ABSOLUTE_FROM_BOTTOM, AnchorPosition.LEFT_BOTTOM);
    plot.getGraphWidget()
            .setSize(new SizeMetrics(border + legendsize, SizeLayoutType.FILL, border, SizeLayoutType.FILL));

    // reduce the number of range labels
    plot.setDomainStep(XYStepMode.INCREMENT_BY_VAL, 10);
    plot.setDomainValueFormat(new DecimalFormat("#"));
    plot.setRangeStep(XYStepMode.SUBDIVIDE, 10);

    //Remove legend
    //plot.getLayoutManager().remove(plot.getLegendWidget());
    //plot.getLayoutManager().remove(plot.getDomainLabelWidget());
    //plot.getLayoutManager().remove(plot.getRangeLabelWidget());
    plot.getLayoutManager().remove(plot.getTitleWidget());

    // Set legend
    plot.getLegendWidget().setTableModel(new DynamicTableModel(4, 2));

    Paint bgPaint = new Paint();
    bgPaint.setColor(Color.BLACK);
    bgPaint.setStyle(Paint.Style.FILL);
    bgPaint.setAlpha(140);

    plot.getLegendWidget().setBackgroundPaint(bgPaint);

    plot.getLegendWidget()
            .setSize(new SizeMetrics(legendsize, SizeLayoutType.ABSOLUTE, 0, SizeLayoutType.FILL));

    plot.getLegendWidget().position(0, XLayoutStyle.ABSOLUTE_FROM_RIGHT, 0, YLayoutStyle.ABSOLUTE_FROM_TOP,
            AnchorPosition.RIGHT_TOP);

    plot.getDomainLabelWidget().position(0, XLayoutStyle.ABSOLUTE_FROM_CENTER, 0,
            YLayoutStyle.RELATIVE_TO_BOTTOM, AnchorPosition.BOTTOM_MIDDLE);

    for (int i = 0; i < value.getCPUCount(); i++) {

        int strokecolor = Color.rgb(i * (255 / value.getCPUCount()), 137, 192);
        int fillcolor = Color.rgb(i * (255 / value.getCPUCount()), 229, 255);

        Double frequencyNumbers[] = value.getfrequencyList(i);
        XYSeries series = new SimpleXYSeries(Arrays.asList(frequencyNumbers),
                SimpleXYSeries.ArrayFormat.Y_VALS_ONLY,
                this.getResources().getString(R.string.frequency_legend, i));
        LineAndPointFormatter seriesFormat = new LineAndPointFormatter(strokecolor, strokecolor, null, null);

        seriesFormat.setPointLabeler(new PointLabeler() {
            @Override
            public String getLabel(XYSeries series, int index) {
                return "o";
            }
        });

        Paint lineFill = new Paint();
        lineFill.setAlpha(150);
        DisplayMetrics metrics = new DisplayMetrics();
        super.getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);
        lineFill.setShader(new LinearGradient(0, 0, 0, metrics.heightPixels, Color.WHITE, fillcolor,
                Shader.TileMode.MIRROR));
        seriesFormat.setFillPaint(lineFill);

        plot.addSeries(series, seriesFormat);
    }

    plot.redraw();

    plot.calculateMinMaxVals();
    PointF minXY = new PointF(plot.getCalculatedMinX().floatValue(), plot.getCalculatedMinY().floatValue());
    PointF maxXY = new PointF(plot.getCalculatedMaxX().floatValue(), plot.getCalculatedMaxY().floatValue());

    plot.setDomainBoundaries(0, value.test.dataset.getFrameCount() - 1, BoundaryMode.FIXED);
    plot.setRangeBoundaries(Math.min(0, minXY.y), maxXY.y * 1.2f, BoundaryMode.FIXED);

    plot.redraw();

    return llLayout;
}

---

From source file:android.support.design.widget.CircularBorderDrawable.java

/**
 * Creates a vertical {@link LinearGradient}
 * @return// w  w w .j  ava 2 s .  c o  m
 */
private Shader createGradientShader() {
    final Rect rect = mRect;
    copyBounds(rect);

    final float borderRatio = mBorderWidth / rect.height();

    final int[] colors = new int[6];
    colors[0] = ColorUtils.compositeColors(mTopOuterStrokeColor, mCurrentBorderTintColor);
    colors[1] = ColorUtils.compositeColors(mTopInnerStrokeColor, mCurrentBorderTintColor);
    colors[2] = ColorUtils.compositeColors(ColorUtils.setAlphaComponent(mTopInnerStrokeColor, 0),
            mCurrentBorderTintColor);
    colors[3] = ColorUtils.compositeColors(ColorUtils.setAlphaComponent(mBottomInnerStrokeColor, 0),
            mCurrentBorderTintColor);
    colors[4] = ColorUtils.compositeColors(mBottomInnerStrokeColor, mCurrentBorderTintColor);
    colors[5] = ColorUtils.compositeColors(mBottomOuterStrokeColor, mCurrentBorderTintColor);

    final float[] positions = new float[6];
    positions[0] = 0f;
    positions[1] = borderRatio;
    positions[2] = 0.5f;
    positions[3] = 0.5f;
    positions[4] = 1f - borderRatio;
    positions[5] = 1f;

    return new LinearGradient(0, rect.top, 0, rect.bottom, colors, positions, Shader.TileMode.CLAMP);
}

---

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