本文整理了Java中android.graphics.Bitmap.setHasAlpha()方法的一些代码示例，展示了Bitmap.setHasAlpha()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Bitmap.setHasAlpha()方法的具体详情如下：
包路径：android.graphics.Bitmap
类名称：Bitmap
方法名：setHasAlpha

Bitmap.setHasAlpha介绍

暂无

代码示例

代码示例来源：origin: bumptech/glide

private Bitmap getNextBitmap() {
  Bitmap.Config config = isFirstFrameTransparent == null || isFirstFrameTransparent
    ? Bitmap.Config.ARGB_8888 : bitmapConfig;
  Bitmap result = bitmapProvider.obtain(downsampledWidth, downsampledHeight, config);
  result.setHasAlpha(true);
  return result;
 }
}

代码示例来源：origin: bumptech/glide

/**
 * Sets the alpha of the Bitmap we're going to re-use to the alpha of the Bitmap we're going to
 * transform. This keeps {@link android.graphics.Bitmap#hasAlpha()}} consistent before and after
 * the transformation for transformations that don't add or remove transparent pixels.
 *
 * @param inBitmap The {@link android.graphics.Bitmap} that will be transformed.
 * @param outBitmap   The {@link android.graphics.Bitmap} that will be returned from the
 *                    transformation.
 */
public static void setAlpha(Bitmap inBitmap, Bitmap outBitmap) {
 outBitmap.setHasAlpha(inBitmap.hasAlpha());
}

代码示例来源：origin: bumptech/glide

private static void normalize(Bitmap bitmap) {
 bitmap.setHasAlpha(true);
 maybeSetPreMultiplied(bitmap);
}

代码示例来源：origin: wasabeef/glide-transformations

@Override
protected Bitmap transform(@NonNull Context context, @NonNull BitmapPool pool,
              @NonNull Bitmap toTransform, int outWidth, int outHeight) {
 int width = toTransform.getWidth();
 int height = toTransform.getHeight();
 Bitmap bitmap = pool.get(width, height, Bitmap.Config.ARGB_8888);
 bitmap.setHasAlpha(true);
 Canvas canvas = new Canvas(bitmap);
 Paint paint = new Paint();
 paint.setAntiAlias(true);
 paint.setShader(new BitmapShader(toTransform, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));
 drawRoundRect(canvas, paint, width, height);
 return bitmap;
}

代码示例来源：origin: wasabeef/glide-transformations

@Override
protected Bitmap transform(@NonNull Context context, @NonNull BitmapPool pool,
              @NonNull Bitmap toTransform, int outWidth, int outHeight) {
 int width = toTransform.getWidth();
 int height = toTransform.getHeight();
 Bitmap bitmap = pool.get(width, height, Bitmap.Config.ARGB_8888);
 bitmap.setHasAlpha(true);
 Drawable mask = Utils.getMaskDrawable(context.getApplicationContext(), maskId);
 Canvas canvas = new Canvas(bitmap);
 mask.setBounds(0, 0, width, height);
 mask.draw(canvas);
 canvas.drawBitmap(toTransform, 0, 0, paint);
 return bitmap;
}

代码示例来源：origin: koral--/android-gif-drawable

/**
 * Retrieves a copy of currently buffered frame.
 *
 * @return current frame
 */
public Bitmap getCurrentFrame() {
  final Bitmap copy = mBuffer.copy(mBuffer.getConfig(), mBuffer.isMutable());
  copy.setHasAlpha(mBuffer.hasAlpha());
  return copy;
}

代码示例来源：origin: bumptech/glide

private Bitmap createBitmapWithRedCircle(int width, int height) {
 int minEdge = Math.min(width, height);
 float radius = minEdge / 2f;
 Bitmap result = Bitmap.createBitmap(minEdge, minEdge, Bitmap.Config.ARGB_8888);
 result.setHasAlpha(true);
 Canvas canvas = new Canvas(result);
 Paint paint = new Paint();
 paint.setAntiAlias(true);
 paint.setColor(Color.RED);
 canvas.drawCircle(radius, radius, radius, paint);
 return result;
}

代码示例来源：origin: bumptech/glide

/**
 * Rotate and/or flip the image to match the given exif orientation.
 *
 * @param pool            A pool that may or may not contain an image of the necessary
 *                        dimensions.
 * @param inBitmap        The bitmap to rotate/flip.
 * @param exifOrientation the exif orientation [1-8].
 * @return The rotated and/or flipped image or toOrient if no rotation or flip was necessary.
 */
public static Bitmap rotateImageExif(@NonNull BitmapPool pool, @NonNull Bitmap inBitmap,
  int exifOrientation) {
 if (!isExifOrientationRequired(exifOrientation)) {
  return inBitmap;
 }
 final Matrix matrix = new Matrix();
 initializeMatrixForRotation(exifOrientation, matrix);
 // From Bitmap.createBitmap.
 final RectF newRect = new RectF(0, 0, inBitmap.getWidth(), inBitmap.getHeight());
 matrix.mapRect(newRect);
 final int newWidth = Math.round(newRect.width());
 final int newHeight = Math.round(newRect.height());
 Bitmap.Config config = getNonNullConfig(inBitmap);
 Bitmap result = pool.get(newWidth, newHeight, config);
 matrix.postTranslate(-newRect.left, -newRect.top);
 result.setHasAlpha(inBitmap.hasAlpha());
 applyMatrix(inBitmap, result, matrix);
 return result;
}

代码示例来源：origin: bumptech/glide

result.setHasAlpha(true);

代码示例来源：origin: bumptech/glide

@Test
public void
testFitCenterSetsOutBitmapToNotHaveAlphaIfInBitmapDoesNotHaveAlphaAndOutBitmapIsReused() {
 Bitmap toTransform = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
 Bitmap toReuse = Bitmap.createBitmap(50, 50, Bitmap.Config.ARGB_8888);
 reset(bitmapPool);
 when(bitmapPool.get(eq(toReuse.getWidth()), eq(toReuse.getHeight()), eq(toReuse.getConfig())))
   .thenReturn(toReuse);
 toReuse.setHasAlpha(true);
 toTransform.setHasAlpha(false);
 Bitmap result = TransformationUtils.fitCenter(bitmapPool, toTransform, toReuse.getWidth(),
   toReuse.getHeight());
 assertEquals(toReuse, result);
 assertFalse(result.hasAlpha());
}

代码示例来源：origin: bumptech/glide

@Test
public void testCenterCropSetsOutBitmapToHaveAlphaIfInBitmapHasAlphaAndOutBitmapIsReused() {
 Bitmap toTransform = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
 Bitmap toReuse = Bitmap.createBitmap(50, 50, Bitmap.Config.ARGB_8888);
 reset(bitmapPool);
 when(bitmapPool.get(eq(50), eq(50), eq(Bitmap.Config.ARGB_8888)))
   .thenReturn(toReuse);
 toReuse.setHasAlpha(false);
 toTransform.setHasAlpha(true);
 Bitmap result = TransformationUtils.centerCrop(bitmapPool, toTransform, toReuse.getWidth(),
   toReuse.getHeight());
 assertEquals(toReuse, result);
 assertTrue(result.hasAlpha());
}

代码示例来源：origin: bumptech/glide

@Test
public void
testCenterCropSetsOutBitmapToNotHaveAlphaIfInBitmapDoesNotHaveAlphaAndOutBitmapIsReused() {
 Bitmap toTransform = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
 Bitmap toReuse = Bitmap.createBitmap(50, 50, Bitmap.Config.ARGB_8888);
 reset(bitmapPool);
 when(bitmapPool.get(eq(50), eq(50), eq(Bitmap.Config.ARGB_8888))).thenReturn(toReuse);
 toReuse.setHasAlpha(true);
 toTransform.setHasAlpha(false);
 Bitmap result = TransformationUtils.centerCrop(bitmapPool, toTransform, toReuse.getWidth(),
   toReuse.getHeight());
 assertEquals(toReuse, result);
 assertFalse(result.hasAlpha());
}

代码示例来源：origin: bumptech/glide

@Test
public void testFitCenterSetsOutBitmapToHaveAlphaIfInBitmapHasAlphaAndOutBitmapIsReused() {
 Bitmap toTransform = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
 Bitmap toReuse = Bitmap.createBitmap(50, 50, Bitmap.Config.ARGB_8888);
 reset(bitmapPool);
 when(bitmapPool.get(eq(toReuse.getWidth()), eq(toReuse.getHeight()), eq(toReuse.getConfig())))
   .thenReturn(toReuse);
 toReuse.setHasAlpha(false);
 toTransform.setHasAlpha(true);
 Bitmap result = TransformationUtils.fitCenter(bitmapPool, toTransform, toReuse.getWidth(),
   toReuse.getHeight());
 assertEquals(toReuse, result);
 assertTrue(result.hasAlpha());
}

代码示例来源：origin: bumptech/glide

@Test
public void testFitCenterSetsOutBitmapToHaveAlphaIfInBitmapHasAlpha() {
 Bitmap toTransform = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
 toTransform.setHasAlpha(true);
 Bitmap result = TransformationUtils.fitCenter(bitmapPool, toTransform,
   toTransform.getWidth() / 2, toTransform.getHeight() / 2);
 assertTrue(result.hasAlpha());
}

代码示例来源：origin: bumptech/glide

@Test
public void testCenterCropSetsOutBitmapToNotHaveAlphaIfInBitmapDoesNotHaveAlpha() {
 Bitmap toTransform = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
 toTransform.setHasAlpha(false);
 Bitmap result = TransformationUtils.centerCrop(bitmapPool, toTransform,
   toTransform.getWidth() / 2, toTransform.getHeight() / 2);
 assertFalse(result.hasAlpha());
}

代码示例来源：origin: bumptech/glide

@Test
public void testFitCenterSetsOutBitmapToNotHaveAlphaIfInBitmapDoesNotHaveAlpha() {
 Bitmap toTransform = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
 toTransform.setHasAlpha(false);
 Bitmap result = TransformationUtils.fitCenter(bitmapPool, toTransform,
   toTransform.getWidth() / 2, toTransform.getHeight() / 2);
 assertFalse(result.hasAlpha());
}

代码示例来源：origin: bumptech/glide

@Test
public void testCenterCropSetsOutBitmapToHaveAlphaIfInBitmapHasAlpha() {
 Bitmap toTransform = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
 toTransform.setHasAlpha(true);
 Bitmap result = TransformationUtils.centerCrop(bitmapPool, toTransform,
   toTransform.getWidth() / 2, toTransform.getHeight() / 2);
 assertTrue(result.hasAlpha());
}

代码示例来源：origin: robolectric/robolectric

@Test
public void hasAlpha() {
 Bitmap bitmap = Bitmap.createBitmap(100, 200, Bitmap.Config.ARGB_8888);
 assertThat(bitmap.hasAlpha()).isFalse();
 bitmap.setHasAlpha(true);
 assertThat(bitmap.hasAlpha()).isTrue();
}

代码示例来源：origin: bumptech/glide

@Test
public void testEncoderEncodesPngWithNullFormatAndBitmapWithAlpha() throws IOException {
 harness.setFormat(null);
 harness.bitmap.setHasAlpha(true);
 assertThat(harness.encode()).isEqualTo(harness.expectedData(CompressFormat.PNG, 90));
}

代码示例来源：origin: bumptech/glide

@Test
public void testEncoderEncodesJpegWithNullFormatAndBitmapWithoutAlpha() throws IOException {
 harness.setFormat(null);
 harness.bitmap.setHasAlpha(false);
 assertThat(harness.encode()).isEqualTo(harness.expectedData(CompressFormat.JPEG, 90));
}