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

public static Bitmap addLabelToBitmap(Bitmap src, String label) {
    float densityFactor = Resources.getSystem().getDisplayMetrics().density;
    final float textPadding = src.getWidth() * 0.05f;

    Bitmap result = Bitmap.createBitmap(src.getWidth(), src.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(result);
    Paint textPaint = new Paint();
    textPaint.setAntiAlias(true);/*from  www .  ja v a  2 s  .  c  o  m*/
    textPaint.setTextSize(12 * densityFactor);
    textPaint.setColor(Color.WHITE);
    textPaint.setStrokeWidth(2 * densityFactor);
    textPaint.setShadowLayer(1 * densityFactor, 0, 0, Color.BLACK);

    float textWidth = textPaint.measureText(label);

    float scaleFactor = (src.getWidth() - textPadding * 2) / textWidth;

    canvas.drawBitmap(src, 0, 0, textPaint);

    canvas.save();
    canvas.scale(scaleFactor, scaleFactor);
    float textPosX = (src.getWidth() / scaleFactor - textWidth) / 2;
    float textPosY = (src.getHeight() - textPadding) / scaleFactor;

    canvas.drawText(label, textPosX, textPosY, textPaint);
    canvas.restore();
    return result;
}

From source file:Main.java

public static Bitmap changeImageColor(Bitmap sourceBitmap, int color) {
    Bitmap resultBitmap = Bitmap.createBitmap(sourceBitmap, 0, 0, sourceBitmap.getWidth() - 1,
            sourceBitmap.getHeight() - 1);
    Paint p = new Paint();
    p.setColor(color);/*from w  ww  . j  av  a2  s  .  c  om*/
    ColorFilter filter = new LightingColorFilter(color, 1);

    Canvas canvas = new Canvas(resultBitmap);
    canvas.drawBitmap(resultBitmap, 0, 0, p);
    return resultBitmap;
}

From source file:Main.java

static Bitmap drawableToBitmap(Drawable drawable) {
    int width = drawable.getIntrinsicWidth();
    int height = drawable.getIntrinsicHeight();
    Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Config.ARGB_8888 : Config.RGB_565;
    Bitmap bitmap = Bitmap.createBitmap(width, height, config);
    Canvas canvas = new Canvas(bitmap);
    drawable.setBounds(0, 0, width, height);
    drawable.draw(canvas);/*  www.j  av a  2s . c o  m*/
    return bitmap;
}

From source file:Main.java

public static Bitmap drawableToBitmap(Drawable drawable) {
    if (null == drawable)
        return null;
    int w = drawable.getIntrinsicWidth();
    int h = drawable.getIntrinsicHeight();
    Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
            : Bitmap.Config.RGB_565;/* w  w  w  .j  a v  a2  s  .c  om*/
    Bitmap bitmap = Bitmap.createBitmap(w, h, config);
    Canvas canvas = new Canvas(bitmap);
    drawable.setBounds(0, 0, w, h);
    drawable.draw(canvas);
    return bitmap;
}

From source file:Main.java

public static Bitmap drawableToBitmap(Drawable drawable) {
    if (drawable instanceof BitmapDrawable) {
        return ((BitmapDrawable) drawable).getBitmap();
    }//w w w.  j  a v  a2s. c o m

    Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(),
            Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
    drawable.draw(canvas);

    return bitmap;
}

From source file:Main.java

/**
 * draw the image to viewBitmap in fill mode.
 * @param viewBitmap Bitmap to be displayed on the device.
 * @param bitmap Bitmap image./*from w  w  w  . j a  v a2  s . com*/
 */
public static void drawImageForFillsMode(final Bitmap viewBitmap, final Bitmap bitmap) {

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

    Canvas canvas = new Canvas(viewBitmap);

    final int width = viewBitmap.getWidth();
    final int height = viewBitmap.getHeight();
    for (int drawY = 0; drawY <= height; drawY += getSizeH) {
        for (int drawX = 0; drawX <= width; drawX += getSizeW) {
            canvas.drawBitmap(bitmap, drawX, drawY, null);
        }
    }
}

From source file:Main.java

/**
 * Method to remove colors in a Bitmap, creating a gray scale image.
 *
 * @param source The original Bitmap.//w  w w. j a va2s .  c  om
 * @return The gray scale Bitmap.
 */
public static Bitmap toGrayscale(Bitmap source) {
    Bitmap bmpGrayscale = Bitmap.createBitmap(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bmpGrayscale);
    canvas.drawBitmap(source, 0, 0, getGrayScalePaint());
    return bmpGrayscale;
}

From source file:Main.java

public static Bitmap createRoundCornerBitmap(Bitmap bitmap, float roundPx) {
    Bitmap roundCornerBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(),
            Bitmap.Config.ARGB_8888);//w ww.j a  v  a 2s.c  o m
    Canvas canvas = new Canvas(roundCornerBitmap);
    Paint paint = new Paint();
    Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    RectF rectF = new RectF(rect);

    int color = 0xff424242;
    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, rect, rect, paint);
    return roundCornerBitmap;
}

From source file:Main.java

public static byte[] bmpToByteArray2(final Bitmap bmp, final boolean needRecycle) {

    int i;/*from  w ww.j  av a2s  .c  om*/
    int j;
    if (bmp.getHeight() > bmp.getWidth()) {
        i = bmp.getWidth();
        j = bmp.getWidth();
    } else {
        i = bmp.getHeight();
        j = bmp.getHeight();
    }

    Bitmap localBitmap = Bitmap.createBitmap(i, j, Bitmap.Config.RGB_565);
    Canvas localCanvas = new Canvas(localBitmap);

    while (true) {
        localCanvas.drawBitmap(bmp, new Rect(0, 0, i, j), new Rect(0, 0, i, j), null);
        if (needRecycle)
            bmp.recycle();
        ByteArrayOutputStream localByteArrayOutputStream = new ByteArrayOutputStream();
        localBitmap.compress(Bitmap.CompressFormat.JPEG, 100, localByteArrayOutputStream);
        localBitmap.recycle();
        byte[] arrayOfByte = localByteArrayOutputStream.toByteArray();
        try {
            localByteArrayOutputStream.close();
            return arrayOfByte;
        } catch (Exception e) {
            //F.out(e);
        }
        i = bmp.getHeight();
        j = bmp.getHeight();
    }
}

From source file:Main.java

public static Bitmap createScreenshot4(View view, int thumbnailWidth, int thumbnailHeight) {
    if (view != null) {
        Bitmap mCapture;/*from  w  w  w.  j  a v  a2  s . c o m*/
        try {
            mCapture = Bitmap.createBitmap(thumbnailWidth, thumbnailHeight, Bitmap.Config.RGB_565);
        } catch (OutOfMemoryError e) {
            return null;
        }
        Canvas c = new Canvas(mCapture);
        Paint transPainter = new Paint();
        transPainter.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
        c.drawRect(0, 0, mCapture.getWidth(), mCapture.getHeight(), transPainter);
        try {
            view.draw(c);
        } catch (Exception e) {
        }
        return mCapture;
    }
    return null;
}