I am displaying an image in full screen mode,but whenever going to display large image then nothing display in the image view. Below code try to resize bitmap but got same result blank imageview.
public static Bitmap getResizedBitmap(Bitmap bm, int newHeight, int newWidth) {
int width = bm.getWidth();
int height = bm.getHeight();
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
Matrix matrix = new Matrix();
// RESIZE THE BIT MAP
matrix.postScale(scaleWidth, scaleHeight);
// RECREATE THE NEW BITMAP
Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width, height,
matrix, false);
return resizedBitmap;
}
You solve your problem from two mehtods
Method 1
call this method(function)
public Bitmap decodeImage(int resourceId) {
try {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeResource(getResources(), resourceId, o);
// The new size we want to scale to
final int REQUIRED_SIZE = 100; // you are free to modify size as your requirement
// Find the correct scale value. It should be the power of 2.
int scale = 1;
while (o.outWidth / scale / 2 >= REQUIRED_SIZE && o.outHeight / scale / 2 >= REQUIRED_SIZE)
scale *= 2;
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
return BitmapFactory.decodeResource(getResources(), resourceId, o2);
} catch (Throwable e) {
e.printStackTrace();
}
return null;
}
add this before your adapter
picture.setImageBitmap((decodeImage(item.drawableId));
instead of
picture.setImageResource(item.drawableId);
Mehtod 2
You need to adjust your image size. The better way is to decode the image to a bitmap, and set the bitmap to the ImageView. For example:
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inSampleSize = 4;
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), item.drawableId, opts);
picture.setImageBitmap (bitmap);
I had the same problem. Got is solved through the following code.
Provide the filepath, desired width and desired height to the method. For more reference see here
public static Bitmap decodeScaledBitmapFromSdCard(String filePath, int reqWidth,
int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(filePath, options);
}
public static int calculateInSampleSize(BitmapFactory.Options options,
int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
// Calculate ratios of height and width to requested height and width
final int heightRatio = Math.round((float) height / (float) reqHeight);
final int widthRatio = Math.round((float) width / (float) reqWidth);
// Choose the smallest ratio as inSampleSize value, this will guarantee
// a final image with both dimensions larger than or equal to the
// requested height and width.
inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
}
return inSampleSize;
}
Probably the image size is too large that the system cannot allocate enough memory to load it.
you can try loading your image after scaling it it with BitmapFactory.Options sampleSize
check this link for more info
http://developer.android.com/training/displaying-bitmaps/load-bitmap.html
may be this will work for you
public static Bitmap decodeSampledBitmapFromResource(String pathName,
int reqWidth, int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(pathName, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth,
reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(pathName, options);
}
public static int calculateInSampleSize(BitmapFactory.Options options,
int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and
// keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) > reqHeight
&& (halfWidth / inSampleSize) > reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
You solve your problem in Fragment
Add method in adapter
public Bitmap decodeImage(int gridViewImageId) {
try {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeResource(mContext.getResources(), gridViewImageId, o);
// The new size we want to scale to
final int REQUIRED_SIZE = 100; // you are free to modify size as your requirement
// Find the correct scale value. It should be the power of 2.
int scale = 1;
while (o.outWidth / scale / 2 >= REQUIRED_SIZE && o.outHeight / scale / 2 >= REQUIRED_SIZE)
scale *= 2;
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
return BitmapFactory.decodeResource(mContext.getResources(), gridViewImageId, o2);
} catch (Throwable e) {
e.printStackTrace();
}
return null;
}
and add this line
imageViewAndroid.setImageBitmap(decodeImage(gridViewImageId[i]));
Related
In an android studio project, I get an image from the gallery using the BitmapFactory.decodeStream method. But the received bitmap is always in landscape orientation, so pictures with a height greater than the width are rotated by 90 degrees. How to solve the problem? Here is the getter code
public static Bitmap decodeSampledBitmapFromResource(Context context, Uri resourceUri, int reqWidth, int reqHeight) throws IOException {
InputStream imageStream = context.getContentResolver().openInputStream(resourceUri);
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(imageStream, null, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
imageStream.close();
imageStream = context.getContentResolver().openInputStream(resourceUri);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
//the bitmap is always in landscape orientation
return BitmapFactory.decodeStream(imageStream, null, options);
}
private static int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of the image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) >= reqHeight
&& (halfWidth / inSampleSize) >= reqWidth) {
inSampleSize += 1;
}
}
return inSampleSize;
}
I am displaying Images on RecyclerView in ImageView with dimensions as 50*50. I have used the guide Guide given by google to display Bitmaps using Scaling etc.Along, with guide I have also use Glide library to set Image.The code to Sample Image is
public static int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 2;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) >= reqHeight
&& (halfWidth / inSampleSize) >= reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
This is a code to DecodeSampleBitmap
public static Bitmap decodeSampledBitmapFromResource(int reqWidth, int reqHeight,byte[] bytes) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
options.inInputShareable=true;
options.inPurgeable=true;
// BitmapFactory.decodeResource(res, resId, options);
BitmapFactory.decodeByteArray(bytes,0,bytes.length,options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeByteArray(bytes,0,bytes.length,options);
}
This is code to set Image to ImageView using Glide
BitmapFactory.Options options = new BitmapFactory.Options();
BitmapFactory.decodeByteArray(imageBytes,0,imageBytes.length,options);
options.inJustDecodeBounds = true;
options.inInputShareable=true;
options.inPurgeable=true;
int imageHeight = options.outHeight;
int imageWidth = options.outWidth;
String imageType = options.outMimeType;
Drawable d=new BitmapDrawable(getResources(),decodeSampledBitmap(50,50));
Glide.with(getActivity())
.load(d).into(offerBinding.restImg);
In-spite of doing all this calculations I am always getting OutOfMemory error and app get crashed when more Images are load. How to resolve this ?
For your base64String to Imageview use it like this
Glide.with(context)
.load(Base64.decode(base64String, Base64.DEFAULT))
.placeholder(R.drawable.placeholder) // load at start
.error(R.drawable.imagenotfound) // in case of error
.override(50,50)
.skipMemoryCache(true)
.into(rowImageView);
I Hope it will works fine
I'm scaling down some bitmaps and getting low quality results.The result image looks different than original image.. I have used following code to scale down image,
Options options = new BitmapFactory.Options();
options.inScaled = false;
Bitmap ib=BitmapFactory.decodeResource(getResources(), R.drawable.card,options);
Bitmap mm=Bitmap.createScaledBitmap(ib,ib.getWidth()/5,ib.getHeight()/5, true);
AND
BitmapFactory.Options m_bmpFactoryOptions = new BitmapFactory.Options();
m_bmpFactoryOptions.inJustDecodeBounds = true;
Bitmap m_bitmap = BitmapFactory.decodeFile(p_file, m_bmpFactoryOptions);
int m_heightRatio =
(int) Math.ceil(m_bmpFactoryOptions.outHeight / (float) p_height);
int m_widthRatio =
(int) Math.ceil(m_bmpFactoryOptions.outWidth / (float) p_width);
if (m_heightRatio > 1 || m_widthRatio > 1)
{
if (m_heightRatio > m_widthRatio)
{
m_bmpFactoryOptions.inSampleSize = m_heightRatio;
}
else
{
m_bmpFactoryOptions.inSampleSize = m_widthRatio;
}
}
m_bmpFactoryOptions.inJustDecodeBounds = false;
m_bitmap = BitmapFactory.decodeFile(p_file, m_bmpFactoryOptions);
*Please help If there are any filters like lanczos,catrom to improve image quality after scale down *
Use this method
public static Bitmap decodeSampledBitmapFromResource(Resources res, int resId,
int reqWidth, int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(res, resId, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeResource(res, resId, options);
}
public static int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
// Calculate ratios of height and width to requested height and width
final int heightRatio = Math.round((float) height / (float) reqHeight);
final int widthRatio = Math.round((float) width / (float) reqWidth);
// Choose the smallest ratio as inSampleSize value, this will guarantee
// a final image with both dimensions larger than or equal to the
// requested height and width.
inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
}
return inSampleSize;
}
Replace options.inScaled = false; with
options.inSampleSize =2
I have this
Bitmap appWidgetBitmap = Bitmap.createBitmap(availableWidth, availableHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(appWidgetBitmap);
And in the log console I see this
"dalvikvm-heap Grow heap (frag case) to......byte allocation
How can I make Bitmap with the lowest resources possible?
I saw something on BitmapFactory, but how to do it because the code above is createBitmap, not from resources.
Use below methods for resizing the image as aspect ratio:
public static int calculateInSampleSize(BitmapFactory.Options options,
int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and
// keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) > reqHeight
&& (halfWidth / inSampleSize) > reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
public static Bitmap decodeSampledBitmapFromResource(Resources res,
int resId, int reqWidth, int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(res, resId, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth,
reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
// BitmapFactory.decodeResource(res, resId, options);
return Bitmap.createScaledBitmap(
BitmapFactory.decodeResource(res, resId, options), reqWidth,
reqHeight, true);
}
Then decode your image into bitmap format and set into the Canvas:
Bitmap src = decodeSampledBitmapFromResource(getResources(),
R.drawable.ic_bg_box, imgWidth, imgHeight);
Canvas canvas = new Canvas(src);
I hope this will help you.
i follow the steps in developers.android.com in best practice for Loading Large Bitmaps Efficiently, but i cant let the video thumbnail image apear in the imageview, what is the problem?
holder.imageHolder.setImageBitmap(decodeSampledBitmapFromResource(
aListData.get(position).path, 130, 100));
public Bitmap decodeSampledBitmapFromResource(String path,
int reqWidth, int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
BitmapFactory.decodeFile(path, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth,
reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(path, options);
}
public int calculateInSampleSize(BitmapFactory.Options options,
int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2
// and keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) > reqHeight
&& (halfWidth / inSampleSize) > reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
If it came from the developers.android.com it should work but i follow the guide but it didn't work.
reference: http://developer.android.com/training/displaying-bitmaps/load-bitmap.html