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

/**
 * Gets the bitmap with rounded corners//from   ww w.ja  v  a 2  s . c om
 *
 * @param bitmap Bitmap for processing
 * @param pixels Picture diameter in pixels
 * @return Rounded picture
 */
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, int pixels) {
    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);
    final float roundPx = pixels;

    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, rect, rect, paint);

    return output;
}

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From source file:Main.java

public static Bitmap BITMAP_RESIZER(Bitmap bitmap, int newWidth, int newHeight) {
    Bitmap scaledBitmap = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);

    float ratioX = newWidth / (float) bitmap.getWidth();
    float ratioY = newHeight / (float) bitmap.getHeight();
    float middleX = newWidth / 2.0f;
    float middleY = newHeight / 2.0f;

    Matrix scaleMatrix = new Matrix();
    scaleMatrix.setScale(ratioX, ratioY, middleX, middleY);

    Canvas canvas = new Canvas(scaledBitmap);
    canvas.setMatrix(scaleMatrix);//  w  w w .j  a v  a2s . c  o m
    canvas.drawBitmap(bitmap, middleX - bitmap.getWidth() / 2, middleY - bitmap.getHeight() / 2,
            new Paint(Paint.FILTER_BITMAP_FLAG));

    return scaledBitmap;

}

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From source file:Main.java

/**
 * Create rounded corner bitmap.//  ww  w .  j  a  v  a 2  s.  com
 *
 * @param bitmap bitmap.
 * @return rounded bitmap.
 */
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {
    Bitmap source = Bitmap.createScaledBitmap(bitmap, 480, 480, false);
    Bitmap output = Bitmap.createBitmap(source.getWidth(), source.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, source.getWidth(), source.getHeight());
    final RectF rectF = new RectF(rect);
    final float roundPx = source.getWidth();

    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(source, rect, rect, paint);

    return output;
}

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From source file:Main.java

public static Bitmap changeBitmapColor(@NonNull Bitmap sourceBitmap, @IntegerRes int color) {

    Bitmap resultBitmap = Bitmap.createBitmap(sourceBitmap, 0, 0, sourceBitmap.getWidth() - 1,
            sourceBitmap.getHeight() - 1);
    Paint p = new Paint();
    ColorFilter filter = new LightingColorFilter(color, 1);
    p.setColorFilter(filter);//w  w w.j av  a  2  s. c o  m

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

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From source file:Main.java

public static Bitmap makeCircleBitmap(Bitmap original) {
    final int width = original.getWidth();
    final int height = original.getHeight();
    final float radius = Math.min(width, height) / 2;

    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

    Paint paint = new Paint();
    paint.setAntiAlias(true);//  ww w. j ava2  s  . c  om
    paint.setShader(new BitmapShader(original, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));

    Canvas canvas = new Canvas(bitmap);
    canvas.drawCircle(radius, radius, radius, paint);

    original.recycle();
    return bitmap;
}

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From source file:Main.java

@Deprecated
public static Bitmap getCombinedByPieces(List<Bitmap> bitmapList, int numStages) {
    //TODO add here the method to greyscale to use the same canvas but to draw a grayscale version
    //i mean, don't use greyscale, but add here all the functionalities to reuse the canvas
    int originalTotalWidth = bitmapList.get(0).getWidth() * numStages;
    Bitmap finalBitmap = Bitmap.createBitmap(originalTotalWidth, bitmapList.get(0).getHeight(),
            Bitmap.Config.ARGB_8888);//  w  w w .j  av  a2 s  .  c o m
    float delta = 0f;
    Canvas comboImage = new Canvas(finalBitmap);
    for (int i = 0; i < numStages; i++) {
        comboImage.translate(delta, 0f);
        comboImage.drawBitmap(bitmapList.get(i), 0f, 0f, null);
        delta = originalTotalWidth / numStages;
    }
    return finalBitmap;
}

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From source file:Main.java

public static void blur(Context context, Bitmap bkg, View view, int width, int height) {
    float radius = 20;
    Log.i("hulixia", bkg.getWidth() + "w,h" + bkg.getDensity());
    Bitmap overlay = Bitmap.createBitmap(bkg.getWidth(), bkg.getHeight(), Bitmap.Config.ARGB_8888);

    Canvas canvas = new Canvas(overlay);
    canvas.translate(-view.getLeft(), -view.getTop());
    canvas.drawBitmap(bkg, 0, 0, null);// ww  w  .j a  v  a2 s . c  o m

    RenderScript rs = RenderScript.create(context);

    Allocation overlayAlloc = Allocation.createFromBitmap(rs, overlay);
    ScriptIntrinsicBlur blur = ScriptIntrinsicBlur.create(rs, overlayAlloc.getElement());
    blur.setInput(overlayAlloc);
    blur.setRadius(radius);
    blur.forEach(overlayAlloc);
    overlayAlloc.copyTo(overlay);
    view.setBackground(new BitmapDrawable(context.getResources(), overlay));
    rs.destroy();
}

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From source file:Main.java

/**
 * Create a rounded corner bitmap from current bitmap
 *
 * @param bitmap//from ww  w  .  j  a  v a2  s. c  o m
 * @return
 */
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {
    try {
        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
        Canvas canvas = new Canvas(output);
        final Paint paint = new Paint();
        final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
        final RectF rectF = new RectF(new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()));
        final float roundPx = 50;
        paint.setAntiAlias(true);
        canvas.drawARGB(0, 0, 0, 0);
        paint.setColor(Color.BLACK);
        canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));

        final Rect src = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());

        canvas.drawBitmap(bitmap, src, rect, paint);
        return output;
    } catch (Exception e) {
        return bitmap;
    }
}

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From source file:Main.java

public static Bitmap roundCorners(final Bitmap source, final float radius) {
    int width = source.getWidth();
    int height = source.getHeight();

    Paint paint = new Paint();
    paint.setAntiAlias(true);//  w ww  . j a v  a2s.c  o m
    paint.setColor(Color.WHITE);

    Bitmap clipped = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    Canvas canvas = new Canvas(clipped);
    canvas.drawRoundRect(new RectF(0, 0, width, height), radius, radius, paint);
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));

    Bitmap rounded = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    canvas = new Canvas(rounded);
    canvas.drawBitmap(source, 0, 0, null);
    canvas.drawBitmap(clipped, 0, 0, paint);

    source.recycle();
    clipped.recycle();

    return rounded;
}

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From source file:Main.java

/**
 * Drawable to Bitmap/*from  ww w  .  ja  va 2  s . co  m*/
 */
public static Bitmap drawableToBitmap(Drawable drawable) {
    if (drawable instanceof BitmapDrawable)
        ((BitmapDrawable) drawable).getBitmap();
    int width = drawable.getIntrinsicWidth();
    int height = drawable.getIntrinsicHeight();
    Bitmap bitmap = createBitmapSafely(width, height, Bitmap.Config.ARGB_8888, 1);
    Canvas canvas = new Canvas(bitmap);
    drawable.setBounds(0, 0, width, height);
    drawable.draw(canvas);
    return bitmap;
}

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