Example usage for android.graphics Canvas Canvas

Introduction

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

Prototype

@UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
public Canvas(long nativeCanvas) 

Source Link

Usage

From source file:Main.java

private static Bitmap composeBitmap(Bitmap firstBitmap, Bitmap secondBitmap, int direction) {
    if (firstBitmap == null) {
        return null;
    }/*from  w ww  . j av  a 2  s  . c  o m*/
    if (secondBitmap == null) {
        return firstBitmap;
    }
    final int fw = firstBitmap.getWidth();
    final int fh = firstBitmap.getHeight();
    final int sw = secondBitmap.getWidth();
    final int sh = secondBitmap.getHeight();
    Bitmap bitmap = null;
    Canvas canvas = null;
    if (direction == TOP) {
        bitmap = Bitmap.createBitmap(sw > fw ? sw : fw, fh + sh, Config.ARGB_8888);
        canvas = new Canvas(bitmap);
        canvas.drawBitmap(secondBitmap, 0, 0, null);
        canvas.drawBitmap(firstBitmap, 0, sh, null);
    } else if (direction == BOTTOM) {
        bitmap = Bitmap.createBitmap(fw > sw ? fw : sw, fh + sh, Config.ARGB_8888);
        canvas = new Canvas(bitmap);
        canvas.drawBitmap(firstBitmap, 0, 0, null);
        canvas.drawBitmap(secondBitmap, 0, fh, null);
    } else if (direction == LEFT) {
        bitmap = Bitmap.createBitmap(fw + sw, sh > fh ? sh : fh, Config.ARGB_8888);
        canvas = new Canvas(bitmap);
        canvas.drawBitmap(secondBitmap, 0, 0, null);
        canvas.drawBitmap(firstBitmap, sw, 0, null);
    } else if (direction == RIGHT) {
        bitmap = Bitmap.createBitmap(fw + sw, fh > sh ? fh : sh, Config.ARGB_8888);
        canvas = new Canvas(bitmap);
        canvas.drawBitmap(firstBitmap, 0, 0, null);
        canvas.drawBitmap(secondBitmap, fw, 0, null);
    }
    return bitmap;
}

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From source file:Main.java

/**
 * Creates a <tt>Bitmap</tt> with rounded corners.
 * @param bitmap the bitmap that will have it's corners rounded.
 * @param factor factor used to calculate corners radius based on width
 *               and height of the image.
 * @return a <tt>Bitmap</tt> with rounded corners created from given
 *         <tt>bitmap</tt>./*from w  w  w .  java  2 s.  co  m*/
 */
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float factor) {
    Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final int color = 0xff424242;
    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    final RectF rectF = new RectF(rect);

    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);

    float rX = ((float) bitmap.getWidth()) * factor;
    float rY = ((float) bitmap.getHeight()) * factor;
    //float r = (rX+rY)/2;

    canvas.drawRoundRect(rectF, rX, rY, paint);

    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);

    return output;
}

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From source file:Main.java

public static Drawable convertViewToDrawable(View view) {
    int spec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
    view.measure(spec, spec);//  w  w  w.  j  av a  2s .co m
    view.layout(UPPER_LEFT_X, UPPER_LEFT_Y, view.getMeasuredWidth(), view.getMeasuredHeight());
    Bitmap b = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(b);
    c.translate(-view.getScrollX(), -view.getScrollY());
    view.draw(c);
    view.setDrawingCacheEnabled(true);
    Bitmap cacheBmp = view.getDrawingCache();
    Bitmap viewBmp = cacheBmp.copy(Bitmap.Config.ARGB_8888, true);
    view.destroyDrawingCache();
    return new BitmapDrawable(viewBmp);
}

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From source file:Main.java

public static Bitmap toRoundBitmap(Bitmap bitmap) {
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    float roundPx;
    float left, top, right, bottom, dst_left, dst_top, dst_right, dst_bottom;
    if (width <= height) {
        roundPx = width / 2 - 5;/*from w  w w .  j  a  va  2s  .  c  o  m*/
        top = 0;
        bottom = width;
        left = 0;
        right = width;
        height = width;
        dst_left = 0;
        dst_top = 0;
        dst_right = width;
        dst_bottom = width;
    } else {
        roundPx = height / 2 - 5;
        float clip = (width - height) / 2;
        left = clip;
        right = width - clip;
        top = 0;
        bottom = height;
        width = height;
        dst_left = 0;
        dst_top = 0;
        dst_right = height;
        dst_bottom = height;
    }

    Bitmap output = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final int color = 0xff424242;
    final Paint paint = new Paint();
    final Rect src = new Rect((int) left, (int) top, (int) right, (int) bottom);
    final Rect dst = new Rect((int) dst_left, (int) dst_top, (int) dst_right, (int) dst_bottom);
    final RectF rectF = new RectF(dst_left + 15, dst_top + 15, dst_right - 20, dst_bottom - 20);

    paint.setAntiAlias(true);

    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);

    canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    canvas.drawBitmap(bitmap, src, dst, paint);
    return output;
}

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From source file:Main.java

public static Bitmap scaleAndFrame(Bitmap bitmap, int width, int height) {
    final int bitmapWidth = bitmap.getWidth();
    final int bitmapHeight = bitmap.getHeight();

    final float scale = Math.min((float) width / (float) bitmapWidth, (float) height / (float) bitmapHeight);

    final int scaledWidth = (int) (bitmapWidth * scale);
    final int scaledHeight = (int) (bitmapHeight * scale);

    final Bitmap decored = Bitmap.createScaledBitmap(bitmap, scaledWidth, scaledHeight, true);
    final Canvas canvas = new Canvas(decored);

    final int offset = (int) (PHOTO_BORDER_WIDTH / 2);
    sStrokePaint.setAntiAlias(false);/*from  w w w  .  j ava2s .  com*/
    canvas.drawRect(offset, offset, scaledWidth - offset - 1, scaledHeight - offset - 1, sStrokePaint);
    sStrokePaint.setAntiAlias(true);

    return decored;

}

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From source file:Main.java

/**
 * Save PNG image with background color/*from  w ww  . jav a2 s  . 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);
}

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From source file:Main.java

/**
 * Crop bitmap image into a round shape/*  w  w  w  .j  av a2  s.  c  om*/
 *
 * @param bitmap   the bitmap
 * @param diameter the diameter of the resulting image
 * @return the rounded bitmap
 */
private static Bitmap getRoundedShape(@NonNull Bitmap bitmap, int diameter) {

    Bitmap resultBitmap = Bitmap.createBitmap(diameter, diameter, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(resultBitmap);
    Path path = new Path();
    path.addCircle(((float) diameter - 1) / 2, ((float) diameter - 1) / 2, (((float) diameter) / 2),
            Path.Direction.CCW);

    canvas.clipPath(path);
    resultBitmap.setHasAlpha(true);
    canvas.drawBitmap(bitmap, new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()),
            new Rect(0, 0, diameter, diameter), null);
    return resultBitmap;
}

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From source file:Main.java

public static Bitmap toRoundCorner(Bitmap bitmap, int pixels) {

    Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final int color = 0xff424242;
    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    final RectF rectF = new RectF(rect);
    final float roundPx = pixels;

    paint.setAntiAlias(true);/*from   ww  w  .  j a v  a  2s . co  m*/
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);

    return output;
}

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From source file:Main.java

public static Bitmap getCircleBitmap(Bitmap bitmap) {
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();
    float roundPx;
    float left, top, right, bottom, dst_left, dst_top, dst_right, dst_bottom;
    if (width <= height) {
        roundPx = width / 2;// w  w  w  . j a  v a2  s. c om
        top = 0;
        bottom = width;
        left = 0;
        right = width;
        height = width;
        dst_left = 0;
        dst_top = 0;
        dst_right = width;
        dst_bottom = width;
    } else {
        roundPx = height / 2;
        float clip = (width - height) / 2;
        left = clip;
        right = width - clip;
        top = 0;
        bottom = height;
        width = height;
        dst_left = 0;
        dst_top = 0;
        dst_right = height;
        dst_bottom = height;
    }

    Bitmap output = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final int color = 0xff424242;
    final Paint paint = new Paint();
    final Rect src = new Rect((int) left, (int) top, (int) right, (int) bottom);
    final Rect dst = new Rect((int) dst_left, (int) dst_top, (int) dst_right, (int) dst_bottom);
    final RectF rectF = new RectF(dst);

    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(bitmap, src, dst, paint);
    return output;
}

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From source file:Main.java

/**
 * draw the image to viewBitmap in scale mode.
 * @param viewBitmap Bitmap to be displayed on the device.
 * @param bitmap Bitmap image./*  www .  ja va 2s.c o m*/
 */
public static void drawImageForScalesMode(final Bitmap viewBitmap, final Bitmap bitmap) {

    float startGridX = 0;
    float startGridY = 0;

    float getSizeW = bitmap.getWidth();
    float getSizeH = bitmap.getHeight();

    float scale;
    final int width = viewBitmap.getWidth();
    final int height = viewBitmap.getHeight();
    if ((getSizeW / width) > (getSizeH / height)) {
        scale = width / getSizeW;
    } else {
        scale = height / getSizeH;
    }

    int targetW = (int) Math.ceil(scale * getSizeW);
    int targetH = (int) Math.ceil(scale * getSizeH);

    Bitmap resizedBitmap = Bitmap.createScaledBitmap(bitmap, targetW, targetH, false);

    if ((getSizeW / width) > (getSizeH / height)) {
        startGridY = (height / 2 - targetH / 2);
    } else {
        startGridX = (width / 2 - targetW / 2);
    }

    Canvas canvas = new Canvas(viewBitmap);
    canvas.drawBitmap(resizedBitmap, startGridX, startGridY, null);
}

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