Example usage for android.graphics Canvas Canvas

List of usage examples for android.graphics Canvas Canvas

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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 getRoundedCornerBitmap(Bitmap bitmap, float roundPx) {
    if (bitmap == null) {
        return null;
    }/*  w  ww  .  j  a  v a 2 s .co m*/
    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);
    canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);
    return output;
}

From source file:Main.java

public static Bitmap getBitmap(Drawable drawable) {
    Bitmap bitmap;/* w  w w  .  j a va2  s  . co m*/
    if (drawable instanceof BitmapDrawable) {
        bitmap = ((BitmapDrawable) drawable).getBitmap();
    } else {
        if (drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
            bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.RGB_565);
        } else {
            bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(),
                    Bitmap.Config.RGB_565);
        }
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);
    }
    return bitmap;
}

From source file:Main.java

/**
 * Extract an underlying bitmap from a drawable
 *
 * @param sourceDrawable The source drawable
 * @return The underlying bitmap//  w  w w.  java2s  .  c om
 */
public static Bitmap getBitmapFromDrawable(Drawable sourceDrawable) {
    if (sourceDrawable == null) {
        return null;
    }

    if (sourceDrawable instanceof BitmapDrawable) {
        return ((BitmapDrawable) sourceDrawable).getBitmap();
    } else {
        //copying drawable object to not manipulate on the same reference
        Drawable.ConstantState constantState = sourceDrawable.getConstantState();
        if (constantState == null) {
            return null;
        }
        Drawable drawable = constantState.newDrawable().mutate();

        Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(),
                Bitmap.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

/**
 * save the bitmap to local,add give a white bg color
 * @param bitmap//w ww.jav  a2 s  .  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

public static Bitmap flattenExtensionIcon(Drawable baseIcon, int color) {
    if (baseIcon == null) {
        return null;
    }//from   ww  w.  j a  va  2s. c  om

    Bitmap outBitmap = Bitmap.createBitmap(EXTENSION_ICON_SIZE, EXTENSION_ICON_SIZE, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(outBitmap);
    baseIcon.setBounds(0, 0, EXTENSION_ICON_SIZE, EXTENSION_ICON_SIZE);
    baseIcon.setColorFilter(color, PorterDuff.Mode.SRC_IN);
    baseIcon.draw(canvas);
    baseIcon.setColorFilter(null);
    baseIcon.setCallback(null); // free up any references
    return outBitmap;
}

From source file:Main.java

/** Return a bitmap identical to src with rounded corners. */
public static final Bitmap roundCornersRGB888(Bitmap src, int roundPixles) {
    final Bitmap output = Bitmap.createBitmap(src.getWidth(), src.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    // TODO: document what is special about this color
    final int color = 0xff424242;
    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, src.getWidth(), src.getHeight());
    final RectF rectF = new RectF(rect);

    paint.setAntiAlias(true);//from  w  ww.j  av  a  2s.  c o m
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    canvas.drawRoundRect(rectF, roundPixles, roundPixles, paint);

    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(src, 0, 0, paint);

    return output;
}

From source file:Main.java

private static Bitmap resizeBitmapByScale(final Bitmap bitmap, final float scale, final boolean recycle) {
    final int width = Math.round(bitmap.getWidth() * scale);
    final int height = Math.round(bitmap.getHeight() * scale);
    if (width == bitmap.getWidth() && height == bitmap.getHeight())
        return bitmap;
    final Bitmap target = Bitmap.createBitmap(width, height, getConfig(bitmap));
    final Canvas canvas = new Canvas(target);
    canvas.scale(scale, scale);// w w w  .  j a va 2  s .  c o m
    final Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.DITHER_FLAG);
    canvas.drawBitmap(bitmap, 0, 0, paint);
    if (recycle) {
        bitmap.recycle();
    }
    return target;
}

From source file:Main.java

public static Bitmap getCroppedBitmap(Bitmap bitmap) {
    if (bitmap == null)
        return null;

    bitmap = cropToSquare(bitmap);//  w  w w  .j  a  va2s .  c  om

    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());

    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    // canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
    canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2, bitmap.getWidth() / 2, paint);
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);
    //      Bitmap _bmp = Bitmap.createScaledBitmap(output, 60, 60, false);
    //      return _bmp;
    return output;
}

From source file:Main.java

public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float roundPx) {
    int w = bitmap.getWidth();
    int h = bitmap.getHeight();
    Bitmap output = Bitmap.createBitmap(w, h, Config.ARGB_8888);
    Canvas canvas = new Canvas(output);
    final int color = 0xff424242;
    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, w, h);
    final RectF rectF = new RectF(rect);
    paint.setAntiAlias(true);/*from   ww w  . jav a2 s .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;
}

From source file:Main.java

/**
 * Creates a bitmap with rounded corners
 *
 * @param bitmap    source bitmap/* w  w w  . j a  va  2  s.com*/
 * @param maxHeight maximal height for result bitmap
 * @param pixels    corner radius
 * @return a new bitmap if succeed, nil instead
 */
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, int maxHeight, int pixels) {
    if (bitmap == null || sApplicationContext == null) {
        return bitmap;
    }
    maxHeight = (int) (sApplicationContext.getResources().getDisplayMetrics().density * maxHeight);
    float scale = bitmap.getHeight() * 1.0f / maxHeight;
    int newWidth = (int) (bitmap.getWidth() / scale);

    Bitmap output = Bitmap.createBitmap(newWidth, maxHeight, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

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

    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    canvas.drawRoundRect(rectF, (float) pixels, (float) pixels, paint);

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

    return output;
}