Example usage for android.graphics Canvas drawColor

Introduction

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

Prototype

public void drawColor(@ColorInt int color) 

Source Link

Document

Fill the entire canvas' bitmap (restricted to the current clip) with the specified color, using srcover porterduff mode.

Usage

From source file:Main.java

public static Bitmap createIdenticon(byte[] hash, int background) {
    Bitmap identicon = Bitmap.createBitmap(5, 5, Bitmap.Config.ARGB_8888);

    float[] hsv = { Integer.valueOf(hash[3] + 128).floatValue() * 360.0f / 255.0f, 0.8f, 0.8f };
    int foreground = Color.HSVToColor(hsv);

    for (int x = 0; x < 5; x++) {
        //Enforce horizontal symmetry
        int i = x < 3 ? x : 4 - x;
        for (int y = 0; y < 5; y++) {
            int pixelColor;
            //toggle pixels based on bit being on/off
            if ((hash[i] >> y & 1) == 1)
                pixelColor = foreground;
            else/*from w w  w  . ja  v  a2s. com*/
                pixelColor = background;
            identicon.setPixel(x, y, pixelColor);
        }
    }

    Bitmap bmpWithBorder = Bitmap.createBitmap(48, 48, identicon.getConfig());
    Canvas canvas = new Canvas(bmpWithBorder);
    canvas.drawColor(background);
    identicon = Bitmap.createScaledBitmap(identicon, 46, 46, false);
    canvas.drawBitmap(identicon, 1, 1, null);

    return bmpWithBorder;
}

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From source file:Main.java

private static Bitmap decorate(Bitmap bitmap, char label, int color, boolean glossy) {

    Canvas canvas = new Canvas(bitmap);

    canvas.drawColor(color);

    String labelString = String.valueOf(label);
    Paint textPaint = getTextPaint(bitmap.getHeight() * 0.75f);
    float cx = bitmap.getWidth() / 2;
    float cy = bitmap.getHeight() / 2;
    float oy = 0;

    synchronized (junkRectangle) {
        textPaint.getTextBounds(labelString, 0, 1, junkRectangle);
        oy = (junkRectangle.top + junkRectangle.bottom) / 2;
    }/*w  w w.  java  2  s  .com*/

    canvas.drawText(labelString, cx, cy - oy, textPaint);

    if (glossy) {
        canvas.drawPath(gloss(bitmap.getWidth()), getGlossPaint());
    }

    return bitmap;

}

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From source file:Main.java

/** All dimensions are in pixels */
private static Bitmap createColorSwatchBitmap(int widthPixels, int heightPixels, int borderWidthPixels,
        int fillColor, int borderColor) {
    final Bitmap bitmap = Bitmap.createBitmap(widthPixels, heightPixels, Config.ARGB_8888);
    final Canvas canvas = new Canvas(bitmap);
    if (borderWidthPixels > 0) {
        canvas.drawColor(borderColor);
        canvas.clipRect(borderWidthPixels, borderWidthPixels, widthPixels - borderWidthPixels,
                heightPixels - borderWidthPixels);
    }/* ww w. j ava2 s  . co m*/
    canvas.drawColor(fillColor);
    return bitmap;
}

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From source file:Main.java

/**
 * save the bitmap to local,add give a white bg color
 * @param bitmap//from www. j  a v  a2s .c  o m
 * @param path
 * @return
 */
public static boolean saveBitmapNoBgToSdCard(Bitmap bitmap, String path) {
    BufferedOutputStream bos = null;
    try {
        File file = new File(path);
        if (file.exists())
            file.delete();
        bos = new BufferedOutputStream(new FileOutputStream(file));

        int w = bitmap.getWidth();
        int h = bitmap.getHeight();
        int w_new = w;
        int h_new = h;
        Bitmap resultBitmap = Bitmap.createBitmap(w_new, h_new, Bitmap.Config.ARGB_8888);
        //            Paint paint = new Paint();
        //            paint.setColor(Color.WHITE);
        Canvas canvas = new Canvas(resultBitmap);
        canvas.drawColor(Color.WHITE);
        canvas.drawBitmap(bitmap, new Rect(0, 0, w, h), new Rect(0, 0, w_new, h_new), null);
        resultBitmap.compress(Bitmap.CompressFormat.JPEG, 100, bos);
        bos.flush();
        resultBitmap.recycle();
        return true;
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (bos != null) {
            try {
                bos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return false;
}

---

From source file:Main.java

/**
 * Create a Bitmap that will be used as a mask to create the preview window in the background.
 * The Bitmap will be the given width and height. The Bitmap will be transparent except for a
 * gradient on the left and bottom sides.
 *
 * @param width Width of the mask./*from w w  w.j  av a 2s  . co  m*/
 * @param height Height of the mask.
 * @param gradientSize Size of the gradient.
 * @return Bitmap mask that will be used to create a preview window.
 */
private static Bitmap createPreviewWindowMask(int width, int height, int gradientSize) {

    // Do nothing if the size is invalid
    if (width <= 0 || height <= 0) {
        return null;
    }

    // Initialize the mask
    Bitmap mask = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(mask);
    canvas.drawColor(Color.TRANSPARENT);

    // If the gradient size is zero, don't draw the gradients
    if (gradientSize <= 0) {
        return mask;
    }

    // Calculate gradient rects
    Rect leftGradientRect = new Rect(0, 0, gradientSize, height - gradientSize);
    Rect bottomGradientRect = new Rect(leftGradientRect.right, height - gradientSize, width, height);
    Rect cornerGradientRect = new Rect(leftGradientRect.left, leftGradientRect.bottom, bottomGradientRect.left,
            bottomGradientRect.bottom);

    // Create left gradient
    Paint leftGradientPaint = new Paint();
    leftGradientPaint.setDither(true);
    leftGradientPaint.setShader(new LinearGradient(leftGradientRect.left, 0, leftGradientRect.right, 0,
            Color.BLACK, Color.TRANSPARENT, Shader.TileMode.CLAMP));

    // Create right gradient
    Paint bottomGradientPaint = new Paint();
    bottomGradientPaint.setDither(true);
    bottomGradientPaint.setShader(
            new LinearGradient(leftGradientRect.right, bottomGradientRect.bottom, leftGradientRect.right,
                    bottomGradientRect.top, Color.BLACK, Color.TRANSPARENT, Shader.TileMode.CLAMP));

    // Create corner gradient
    Paint cornerGradientPaint = new Paint();
    cornerGradientPaint.setDither(true);
    cornerGradientPaint.setShader(new RadialGradient(cornerGradientRect.right, cornerGradientRect.top,
            gradientSize, Color.TRANSPARENT, Color.BLACK, Shader.TileMode.CLAMP));

    // Draw the gradients
    canvas.drawRect(leftGradientRect, leftGradientPaint);
    canvas.drawRect(bottomGradientRect, bottomGradientPaint);
    canvas.drawRect(cornerGradientRect, cornerGradientPaint);

    return mask;
}

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From source file:Main.java

/**
 * Save PNG image with background color//from w w  w  . j a va 2s  .c  o m
 * @param strFileName Save file path
 * @param bitmap Input bitmap
 * @param nBackgroundColor background color
 * @return whether success or not
 */
public static boolean saveBitmapPNGWithBackgroundColor(String strFileName, Bitmap bitmap,
        int nBackgroundColor) {
    boolean bSuccess1 = false;
    boolean bSuccess2 = false;
    boolean bSuccess3;
    File saveFile = new File(strFileName);

    if (saveFile.exists()) {
        if (!saveFile.delete())
            return false;
    }

    int nA = (nBackgroundColor >> 24) & 0xff;

    // If Background color alpha is 0, Background color substitutes as white
    if (nA == 0)
        nBackgroundColor = 0xFFFFFFFF;

    Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(newBitmap);
    canvas.drawColor(nBackgroundColor);
    canvas.drawBitmap(bitmap, rect, rect, new Paint());

    OutputStream out = null;

    try {
        bSuccess1 = saveFile.createNewFile();
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }

    try {
        out = new FileOutputStream(saveFile);
        bSuccess2 = newBitmap.compress(CompressFormat.PNG, 100, out);
    } catch (Exception e) {
        e.printStackTrace();
    }

    try {
        if (out != null) {
            out.flush();
            out.close();
            bSuccess3 = true;
        } else
            bSuccess3 = false;

    } catch (IOException e) {
        e.printStackTrace();
        bSuccess3 = false;
    } finally {
        if (out != null) {
            try {
                out.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    return (bSuccess1 && bSuccess2 && bSuccess3);
}

---

From source file:Main.java

/**
 * Save jpeg image with background color
 * @param strFileName Save file path/* ww w  .  ja  v  a  2 s. c o  m*/
 * @param bitmap Input bitmap
 * @param nQuality Jpeg quality for saving
 * @param nBackgroundColor background color
 * @return whether success or not
 */
public static boolean saveBitmapJPEGWithBackgroundColor(String strFileName, Bitmap bitmap, int nQuality,
        int nBackgroundColor) {
    boolean bSuccess1 = false;
    boolean bSuccess2 = false;
    boolean bSuccess3;
    File saveFile = new File(strFileName);

    if (saveFile.exists()) {
        if (!saveFile.delete())
            return false;
    }

    int nA = (nBackgroundColor >> 24) & 0xff;

    // If Background color alpha is 0, Background color substitutes as white
    if (nA == 0)
        nBackgroundColor = 0xFFFFFFFF;

    Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(newBitmap);
    canvas.drawColor(nBackgroundColor);
    canvas.drawBitmap(bitmap, rect, rect, new Paint());

    // Quality limitation min/max
    if (nQuality < 10)
        nQuality = 10;
    else if (nQuality > 100)
        nQuality = 100;

    OutputStream out = null;

    try {
        bSuccess1 = saveFile.createNewFile();
    } catch (IOException e1) {
        e1.printStackTrace();
    }

    try {
        out = new FileOutputStream(saveFile);
        bSuccess2 = newBitmap.compress(CompressFormat.JPEG, nQuality, out);
    } catch (Exception e) {
        e.printStackTrace();
    }

    try {
        if (out != null) {
            out.flush();
            out.close();
            bSuccess3 = true;
        } else
            bSuccess3 = false;

    } catch (IOException e) {
        e.printStackTrace();
        bSuccess3 = false;
    } finally {
        if (out != null) {
            try {
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    return (bSuccess1 && bSuccess2 && bSuccess3);
}

---

From source file:Main.java

/**
 * Save jpeg image with background color
 * @param strFileName Save file path//  ww  w  .ja v a  2 s. c  o m
 * @param bitmap Input bitmap
 * @param nQuality Jpeg quality for saving
 * @param nBackgroundColor background color
 * @return whether success or not
 */
public static boolean saveBitmapJPEGWithBackgroundColor(String strFileName, Bitmap bitmap, int nQuality,
        int nBackgroundColor) {
    boolean bSuccess1 = false;
    boolean bSuccess2 = false;
    boolean bSuccess3;
    File saveFile = new File(strFileName);

    if (saveFile.exists()) {
        if (!saveFile.delete())
            return false;
    }

    int nA = (nBackgroundColor >> 24) & 0xff;

    // If Background color alpha is 0, Background color substitutes as white
    if (nA == 0)
        nBackgroundColor = 0xFFFFFFFF;

    Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(newBitmap);
    canvas.drawColor(nBackgroundColor);
    canvas.drawBitmap(bitmap, rect, rect, new Paint());

    // Quality limitation min/max
    if (nQuality < 10)
        nQuality = 10;
    else if (nQuality > 100)
        nQuality = 100;

    OutputStream out = null;

    try {
        bSuccess1 = saveFile.createNewFile();
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }

    try {
        out = new FileOutputStream(saveFile);
        bSuccess2 = newBitmap.compress(CompressFormat.JPEG, nQuality, out);
    } catch (Exception e) {
        e.printStackTrace();
    }

    try {
        if (out != null) {
            out.flush();
            out.close();
            bSuccess3 = true;
        } else
            bSuccess3 = false;

    } catch (IOException e) {
        e.printStackTrace();
        bSuccess3 = false;
    } finally {
        if (out != null) {
            try {
                out.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    return (bSuccess1 && bSuccess2 && bSuccess3);
}

---

From source file:Main.java

/**
 * Save jpeg image with background color
 * @param strFileName Save file path/*from  w  ww.j av a2  s  .c o m*/
 * @param bitmap Input bitmap
 * @param nQuality Jpeg quality for saving
 * @param nBackgroundColor background color
 * @return whether success or not
 */
public static boolean saveBitmapJPEGWithBackgroundColor(String strFileName, Bitmap bitmap, int nQuality,
        int nBackgroundColor) {
    boolean bSuccess1 = false;
    boolean bSuccess2 = false;
    boolean bSuccess3;
    File saveFile = new File(strFileName);

    if (saveFile.exists()) {
        if (!saveFile.delete())
            return false;
    }

    int nA = (nBackgroundColor >> 24) & 0xff;

    // If Background color alpha is 0, Background color substitutes as white
    if (nA == 0)
        nBackgroundColor = 0xFFFFFFFF;

    Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(newBitmap);
    canvas.drawColor(nBackgroundColor);
    canvas.drawBitmap(newBitmap, rect, rect, new Paint());
    canvas.drawBitmap(bitmap, rect, rect, new Paint());

    // Quality limitation min/max
    if (nQuality < 10)
        nQuality = 10;
    else if (nQuality > 100)
        nQuality = 100;

    OutputStream out = null;

    try {
        bSuccess1 = saveFile.createNewFile();
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }

    try {
        out = new FileOutputStream(saveFile);
        bSuccess2 = newBitmap.compress(CompressFormat.JPEG, nQuality, out);
    } catch (Exception e) {
        e.printStackTrace();
    }

    try {
        if (out != null) {
            out.flush();
            out.close();
            bSuccess3 = true;
        } else
            bSuccess3 = false;

    } catch (IOException e) {
        e.printStackTrace();
        bSuccess3 = false;
    } finally {
        if (out != null) {
            try {
                out.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    return (bSuccess1 && bSuccess2 && bSuccess3);
}

---

From source file:Main.java

public static Bitmap view2Bitmap(View view) {
    if (view == null)
        return null;
    Bitmap ret = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(ret);
    Drawable bgDrawable = view.getBackground();
    if (bgDrawable != null) {
        bgDrawable.draw(canvas);//from   w  w  w . ja va 2 s.  c  om
    } else {
        canvas.drawColor(Color.WHITE);
    }
    view.draw(canvas);
    return ret;
}

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