Develop Reference

Bitmap not setting in imageView random issue

I am trying to fetch file from device storage and showing it in image view .
Sometimes it is working perfectly fine, but sometimes not. Although bitmap is there but image view remains black.
Kindly suggest.
storage file Location
file:/storage/emulated/0/Download/Full-hd-nature-wallpapers-free-download2.jpg
method which is returning bitmap
public static Bitmap convertToBitmap(File file) {
URI uri = null;
try {
uri = file.toURI();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 1;
Bitmap bmp = BitmapFactory.decodeStream(uri.toURL().openStream(), new Rect(), options);
//bmp.recycle();
return bmp;
} catch (Exception e) {
return null;
}//catch
}
setting image
imageViewPatientImage.setImageBitmap(convertToBitmap(new File(mImagePath));

Try this:
Bitmap bitmap = getThumbnail(uri);
showImage.setImageBitmap(bitmap);
Pass Bitmap for Optimization:
public Bitmap getThumbnail(Uri uri) throws FileNotFoundException, IOException{
InputStream input = getContext().getContentResolver().openInputStream(uri);
BitmapFactory.Options onlyBoundsOptions = new BitmapFactory.Options();
onlyBoundsOptions.inJustDecodeBounds = true;
onlyBoundsOptions.inDither=true;//optional
onlyBoundsOptions.inPreferredConfig=Bitmap.Config.ARGB_8888;//optional
BitmapFactory.decodeStream(input, null, onlyBoundsOptions);
input.close();
if ((onlyBoundsOptions.outWidth == -1) || (onlyBoundsOptions.outHeight == -1))
return null;
int originalSize = (onlyBoundsOptions.outHeight > onlyBoundsOptions.outWidth) ? onlyBoundsOptions.outHeight : onlyBoundsOptions.outWidth;
double ratio = (originalSize > 500) ? (originalSize / 500) : 1.0;
BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
bitmapOptions.inSampleSize = getPowerOfTwoForSampleRatio(ratio);
bitmapOptions.inDither=true;//optional
bitmapOptions.inPreferredConfig=Bitmap.Config.ARGB_8888;//optional
input = getContext().getContentResolver().openInputStream(uri);
Bitmap bitmap = BitmapFactory.decodeStream(input, null, bitmapOptions);
input.close();
return bitmap;
}
private static int getPowerOfTwoForSampleRatio(double ratio){
int k = Integer.highestOneBit((int)Math.floor(ratio));
if(k==0) return 1;
else return k;
}

Android create file from drawable

Is there any way to create file from image drawable to send it via MultypartEntity? I having error all the time.
fileUri = Uri.parse("android.resource://com.wellbread/drawable/placeholder_avatar.png");
mCurrentPhotoPath = fileUri.toString();
java.io.FileNotFoundException: android.resource:/com.wellbread/drawable/placeholder_avatar.png: open failed: ENOENT (No such file or directory)
08-25 12:01:53.134 3663-3684/? W/System.err﹕ at libcore.io.IoBridge.open(IoBridge.java:456)

Try the following sample code:
Drawable drawable = getResources().getDrawable(R.drawable.ic_action_home);
if (drawable != null) {
Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
final byte[] bitmapdata = stream.toByteArray();
String url = "http://10.0.2.2/api/fileupload";
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
// Add binary body
if (bitmapdata != null) {
ContentType contentType = ContentType.create("image/png");
String fileName = "ic_action_home.png";
builder.addBinaryBody("file", bitmapdata, contentType, fileName);
httpEntity = builder.build();
...
}
...
}

try this:
try
{
File f=new File("file name");
InputStream inputStream = getResources().openRawResource(id); // id drawable
OutputStream out=new FileOutputStream(f);
byte buf[]=new byte[1024];
int len;
while((len=inputStream.read(buf))>0)
out.write(buf,0,len);
out.close();
inputStream.close();
}
catch (IOException e){}
}

You can open an InputStream from your drawable resource using following code:
try
{
File f=new File("your file name");
//id is some like R.drawable.b_image
InputStream inputStream = getResources().openRawResource(id);
OutputStream out=new FileOutputStream(f);
byte buf[]=new byte[1024];
int len;
while((len=inputStream.read(buf))>0)
out.write(buf,0,len);
out.close();
inputStream.close();
}
catch (IOException e){}
}

You have to get Bitmap from drawable:
public static Bitmap decodeAndSetWidthHeight(Resources res, int resId, int reqWidth, int reqHeight){
Bitmap btm = BitmapHelper.decodeSampledBitmapFromResource(res, resId, reqWidth, reqHeight);
return decodeAndSetWidthHeight(btm, reqWidth, reqHeight);
}
Then you can create file from bitmap
public static File bitmapToFile(Bitmap bitmap){
File outFile = FileHelper.getImageFilePNG();
FileOutputStream out = null;
try {
out = new FileOutputStream(outFile);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
try {
if (out != null) {
out.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return outFile;
}
UPDATE (sorry, forget to provide some methods):
public static File getImageFilePNG() {
File sdCard = Environment.getExternalStorageDirectory();
File dir = new File(sdCard.getAbsolutePath() + "/any name folder");
dir.mkdirs();
String fileName = String.format("%d.png", System.currentTimeMillis());
return new File(dir, fileName);
}
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);
Log.d("ANT", "options.inSampleSize : " + options.inSampleSize);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeResource(res, resId, options);
}
public static Bitmap decodeAndSetWidthHeight(Bitmap btm, int reqWidth, int reqHeight){
Matrix m = new Matrix();
RectF inRect = new RectF(0, 0, btm.getWidth(), btm.getHeight());
RectF outRect = new RectF(0, 0, reqWidth, reqHeight);
m.setRectToRect(inRect, outRect, Matrix.ScaleToFit.FILL);
float[] values = new float[9];
m.getValues(values);
return Bitmap.createScaledBitmap(btm, (int) (btm.getWidth() * values[0]), (int) (btm.getHeight() * values[4]), true);
}

Android: mPrevCallback to JPG, results in black pictures

I am trying to capture the preview of the camera on a surfaceview ,to save it as a JPEG in the internal memory. I found some code here on this site, that does mostly I want but saves the image to the SD Card. I changed that, and came up with the following code.
Camera.PreviewCallback mPrevCallback = new Camera.PreviewCallback()
{
#Override
public void onPreviewFrame( byte[] data, Camera Cam ) {
//Log.d(TAG, "FRAME");
Camera.Parameters parameters = Cam.getParameters();
int format = parameters.getPreviewFormat();
//Log.d(TAG, "FORMAT:" + format);
//YUV formats require more conversion
if (format == ImageFormat.NV21 || format == ImageFormat.YUY2 || format == ImageFormat.NV16) {
int w = parameters.getPreviewSize().width;
int h = parameters.getPreviewSize().height;
// Get the YuV image
YuvImage yuv_image = new YuvImage(data, format, w, h, null);
// Convert YuV to Jpeg
Rect rect = new Rect(0, 0, w, h);
ByteArrayOutputStream output_stream = new ByteArrayOutputStream();
yuv_image.compressToJpeg(rect, 100, output_stream);
byte[] byt = output_stream.toByteArray();
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream("/data/data/com.example.max.camtest/files/test"+System.currentTimeMillis()+".jpg");
outStream.write(byt);
outStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
}
}
};
The preview is shown on the surfaceview and the mPrevCallback is triggered.It successfully saves pictures that have diffrent sizes (250~500Kb) but they are all black. When I try to capture a picture with the camera.takePicture function is it also black.
What Am I doing wrong? How can I debug this?
Thanks!

Use this intent to take picture
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = new File(android.os.Environment.getExternalStorageDirectory(), AppInfo.getInstance().getCurrentLoginUserInfo().getId()+".jpg");
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
intent.putExtra("return-data", true);
startActivityForResult(intent, 1);
and on Your Activity Result.... Note Bitmap bitmap = getScaledBitmap(uri.getPath(), 200, true); 200 is your max image size.
if(requestCode == 1)
{
String base = Environment.getExternalStorageDirectory().getAbsolutePath().toString();
final String imgPath = base + "/" +AppInfo.getInstance().getCurrentLoginUserInfo().getId()+".jpg";
File file = new File(imgPath);
if (file.exists())
{
Uri uri = Uri.fromFile(file);
Log.d(TAG, "Image Uri path: " + uri.getPath());
Bitmap bitmap = getScaledBitmap(uri.getPath(), 200, true);
}}
This method ll return image bitmap after resizing it-
private Bitmap getScaledBitmap(String imagePath, float maxImageSize, boolean filter) {
FileInputStream in;
BufferedInputStream buf;
try {
in = new FileInputStream(imagePath);
buf = new BufferedInputStream(in);
Bitmap realImage = BitmapFactory.decodeStream(buf);
float ratio = Math.min(
(float) maxImageSize / realImage.getWidth(),
(float) maxImageSize / realImage.getHeight());
int width = Math.round((float) ratio * realImage.getWidth());
int height = Math.round((float) ratio * realImage.getHeight());
Bitmap newBitmap = Bitmap.createScaledBitmap(realImage, width, height, filter);
return newBitmap;
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
Now you have scaled bitmap image.
Hope this ll help you.

How to save image bitmap after rotation? [duplicate]

This question already has answers here:
Android saving file to external storage
(13 answers)
Closed 2 years ago.
I develop app that save images to sd Card and all the pictures are upside i want to rotate them and save them in the rotate position i choose .
i know how to rotate on my code but the image is not saved permanently.
here is my code :
//Rotate the picture
public static Bitmap rotate(Bitmap source, float angle) {
Matrix matrix = new Matrix();
matrix.postRotate(angle);
return Bitmap.createBitmap(source, 0, 0, source.getWidth(),source.getHeight(), matrix, false);
}
//Resize image
public void resizeImage(String path , int Wdist,int Hdist){
try
{
int inWidth = 0;
int inHeight = 0;
InputStream in = new FileInputStream(path);
// decode image size (decode metadata only, not the whole image)
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(in, null, options);
in.close();
in = null;
// save width and height
inWidth = options.outWidth;
inHeight = options.outHeight;
// decode full image pre-resized
in = new FileInputStream(path);
options = new BitmapFactory.Options();
// calc rought re-size (this is no exact resize)
options.inSampleSize = Math.max(inWidth/Wdist, inHeight/Hdist);
// decode full image
Bitmap roughBitmap = BitmapFactory.decodeStream(in, null, options);
// calc exact destination size
Matrix m = new Matrix();
RectF inRect = new RectF(0, 0, roughBitmap.getWidth(), roughBitmap.getHeight());
RectF outRect = new RectF(0, 0, Wdist, Hdist);
m.setRectToRect(inRect, outRect, Matrix.ScaleToFit.CENTER);
float[] values = new float[9];
m.getValues(values);
// resize bitmap
Bitmap resizedBitmap = Bitmap.createScaledBitmap(roughBitmap, (int) (roughBitmap.getWidth() * values[0]), (int) (roughBitmap.getHeight() * values[4]), true);
// save image
try
{
FileOutputStream out = new FileOutputStream(path);
resizedBitmap.compress(Bitmap.CompressFormat.JPEG, 80, out);
}
catch (Exception e)
{
Log.e("Image", e.getMessage(), e);
}
}
catch (IOException e)
{
Log.e("Image", e.getMessage(), e);
}
}
thanks for the helpers :)

You'll need to save the Bitmap back.
try {
File dir = new File("path/to/directory");
if(!dir.exists())
dir.mkdirs();
File file = new File(dir, "original_img_name.png");
FileOutputStream out;
out = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.PNG, 90, out);
} catch (Exception e) {
e.printStackTrace();
} finally {
try{
out.close();
} catch(Throwable ignore) {}
}
Edit 1 :
Replace
bmp.compress(Bitmap.CompressFormat.PNG, 90, out); with
resizedBitmap.compress(Bitmap.CompressFormat.JPEG, 80, out); and set correct values for the directory path and the image name. If you want to replace the previous images, use the original path and image name.
Also, make sure you include the following permission.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

You can also try this one
return Bitmap.createBitmap(source, 0, 0, source.getWidth(),source.getHeight(), matrix, true);
Go through this link
how to rotate a bitmap 90 degrees

The following code can help you compress and resize the bitmap.
Note:
Create a String type variable with name of photoPath and store the photo url in it.
public void compressImage(){
Log.i("compressPhoto", "Compress and resize photo started.");
// Getting Image
InputStream in = null;
try {
in = new FileInputStream(photoPath);
} catch (FileNotFoundException e) {
Log.e("TAG","originalFilePath is not valid", e);
}
BitmapFactory.Options options = new BitmapFactory.Options();
Bitmap bitmap = BitmapFactory.decodeStream(in, null, options);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap = bitmap.createScaledBitmap(bitmap,(int)(bitmap.getWidth()*0.2), (int)(bitmap.getHeight()*0.2), true);
bitmap.compress(Bitmap.CompressFormat.JPEG, 50, stream);
byte[] byteArray = stream.toByteArray();
// Storing Back
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(photoPath);
outStream.write(byteArray);
outStream.close();
} catch (Exception e) {
Log.e("TAG","could not save", e);
}
}

How to prevent out of memory exception while trying to convert input stream object into bitmap in android?

I had used following code to convert inputstream object into bitmap. But it returns "out of memory error", and BitmapFactory Options always returns Zero.
S3ObjectInputStream inputStreamReceiptObject = objectReceiptFromAmazonS3
.getObjectContent();
Bitmap bitmapImageFromAmazon = null;
try {
if (inputStreamReceiptObject != null){
BitmapFactory.Options o = new BitmapFactory.Options();
o.inSampleSize = 8;
o.inJustDecodeBounds = true;
bitmapImageFromAmazon = BitmapFactory.decodeStream(inputStreamReceiptObject,null,o); // o is always null
if(bitmapImageFromAmazon == null){
System.out.println("Bitmap null");
}
}
Advance Thanks for any help !
SOLUTION : ( Lot of thanks to Honourable Don and Honourable Akshat )
ByteArrayOutputStream baos = null ;
InputStream is1 = null,is2 = null;
try {
baos = new ByteArrayOutputStream();
// Fake code simulating the copy
// You can generally do better with nio if you need...
// And please, unlike me, do something about the Exceptions :D
byte[] buffer = new byte[1024];
int len;
while ((len = inputStreamReceiptObject.read(buffer)) > -1 ) {
baos.write(buffer, 0, len);
}
baos.flush();
// Open new InputStreams using the recorded bytes
// Can be repeated as many times as you wish
is1 = new ByteArrayInputStream(baos.toByteArray());
is2 = new ByteArrayInputStream(baos.toByteArray());
bitmapImageFromAmazon = getBitmapFromInputStream(is1,is2);
if(bitmapImageFromAmazon == null)
System.out.println("IMAGE NULL");
else
System.out.println("IMAGE NOT NULL");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
baos.close();
is1.close();
is2.close();
}
public Bitmap getBitmapFromInputStream(InputStream is1,InputStream is2) throws IOException {
Bitmap bitmap = null;
try {
//Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(is1,null,o);
//Find the correct scale value. It should be the power of 2.
int scale=1;
//Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize=scale;
bitmap = BitmapFactory.decodeStream(is2, null, o2);
} catch (Exception e) {
e.printStackTrace();
}
return bitmap;
}

Why dont you try and scale the bitmap image down? Thats mostly the reason why your app showed OOM exception
BitmapFactory.Options o = new BitmapFactory.Options();
o.inScaled = false;
o.inJustDecodeBounds = true;
FileInputStream stream1 = new FileInputStream(f);
BitmapFactory.decodeStream(stream1, null, o);
stream1.close();
// Find the correct scale value. It should be the power of 2.
final int REQUIRED_SIZE = 70; //This is the max size of the bitmap in kilobytes
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp / 2 < REQUIRED_SIZE
|| height_tmp / 2 < REQUIRED_SIZE)
break;
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
FileInputStream stream2 = new FileInputStream(f);
Bitmap bitmap = BitmapFactory.decodeStream(stream2, null, o2);
stream2.close();
return bitmap;

The Out Of Memory error should be as it says: you do not have enough memory on your device to render the entire image. You need to ensure that the image you're downloading from S3 is not too big for the device.
To help you debug, try running downloading a smaller image to see if you are still receiving the OOM errors
URLConnection conn = new URL("http://upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Victoria_Parade_postcard.jpg/120px-Victoria_Parade_postcard.jpg").openConnection();
InputStream stream = conn.getInputStream();
Bitmap image = BitmapFactory.decodeStream(stream, null, null);
The o you pass into decodeStream is null because of the OOM error (it must have gone out of scope when you examined it in the debugger).