Develop Reference

What is the correct URI to send to handleSamplingAndRotationBitmap?

I have the common problem of display a picture in the correct rotation. My images are stored on a server. I call an image and display it in my app. Each image is rotated. So I found a correction with handleSamplingAndRotationBitmap.
public static Bitmap handleSamplingAndRotationBitmap(Context context, Uri selectedImage)
throws IOException {
int MAX_HEIGHT = 1024;
int MAX_WIDTH = 1024;
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
InputStream imageStream = context.getContentResolver().openInputStream(selectedImage);
BitmapFactory.decodeStream(imageStream, null, options);
imageStream.close();
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, MAX_WIDTH, MAX_HEIGHT);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
imageStream = context.getContentResolver().openInputStream(selectedImage);
Bitmap img = BitmapFactory.decodeStream(imageStream, null, options);
img = rotateImageIfRequired(img, selectedImage);
return img;
}
But it's impossible for me to send the correct Uri selectedImage.
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon = null;
final String myUrlStr = urldisplay;
URL url;
try {
url = new URL(myUrlStr);
uri = Uri.fromFile(new File(urldisplay));
uri2 = Uri.parse((urldisplay).toString());
mIcon = handleSamplingAndRotationBitmap(getContext(),uri2);
} catch (MalformedURLException e1) {
e1.printStackTrace();
}
I have the error
} catch (FileNotFoundException e) {
InputStream in = null;
try {
in = new URL(DataConstantes.lien_URLEtb + "Aucune_photo_etablissement.png").openStream();
} catch (IOException e1) {
flagError = true;
}
mIcon = BitmapFactory.decodeStream(in);
} catch (Exception e) {
flagError=true;
}
java.io.FileNotFoundException:
/http:/$$$$$$$$$$/appli/android_connect/Etablissement/abordage.jpg (No
such file or directory)
Do you know how I can send the correct URI ?
Thanks

how to take screenshot and not save it on gallery in android

I use below code for ScreenShot:
public class startActivity{
Bitmap layoutBitmap = Bitmap.createBitmap(mReLayout.getWidth(), mReLayout.getHeight(), Bitmap.Config.ARGB_4444);
Canvas canvas = new Canvas(layoutBitmap);
mReLayout.draw(canvas);
Uri uri = getImageUri(getApplicationContext(), layoutBitmap);
Intent mIntent = new Intent(CategoryActivity.this, MainActivity.class);
mIntent.putExtra(Constant.BYTE_IMAGE, uri.toString());
startActivity(mIntent);
}
MainActivity.class
private void setUpImageBitmap() {
Uri uri = Uri.parse(getIntent().getExtras().getString(Constant.BYTE_IMAGE));
String selectedImagePath = getPath(uri);
mImageCube.setImageBitmap(Utils.decodeSampledBitmapFromResource(selectedImagePath, 200, 200));
}
public String getPath(Uri uri) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
return cursor.getString(idx);
}
Class Utils
public static Bitmap decodeSampledBitmapFromResource(String resId,
int reqWidth, int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(resId, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(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 = 2;
if (height > reqHeight || width > reqWidth) {
if (width > height) {
inSampleSize = Math.round((float) height / (float) reqHeight);
} else {
inSampleSize = Math.round((float) width / (float) reqWidth);
}
}
return inSampleSize;
}
How can I take a screenshot without saving it in the gallery?

Here Below code for how to take screenshot for any android control, means ImageView or Layout. below code for ImageView.
ImageView iv = (ImageView) findViewById(R.id.imageView1);
View v1 = getWindow().getDecorView().getRootView();
// View v1 = iv.getRootView(); //even this works
// View v1 = findViewById(android.R.id.content); //this works too
// but gives only content
v1.setDrawingCacheEnabled(true);
myBitmap = v1.getDrawingCache();
saveBitmap(myBitmap);
saveBitmap(myBitmap);
public void saveBitmap(Bitmap bitmap) {
String filePath = Environment.getExternalStorageDirectory()
+ File.separator + "Pictures/screenshot.png";
String nomedia = Environment.getExternalStorageDirectory()
+ File.separator + "Pictures/.nomedia";
File nomediaFile= new File(nomedia);
if(!nomediaFile.exists()){
nomediaFile.createNewFile();
}
File imagePath = new File(filePath);
FileOutputStream fos;
try {
fos = new FileOutputStream(imagePath);
bitmap.compress(CompressFormat.PNG, 100, fos);
fos.flush();
fos.close();
sendMail(filePath);
} catch (FileNotFoundException e) {
Log.e("GREC", e.getMessage(), e);
} catch (IOException e) {
Log.e("GREC", e.getMessage(), e);
}
}
Now you dont want to show any images in gallery then you have to ceate .nomedia file in folder of screenshot save. see below code for that.
String nomedia = Environment.getExternalStorageDirectory()
+ File.separator + "Pictures/.nomedia";
File nomediaFile= new File(nomedia);
if(!nomediaFile.exists()){
nomediaFile.createNewFile();
}
Above code already implemented in saveBitmap() method. I think help you for you this...
Now you want to share this image then get path of image and share with below code.
public void shareImage(String path) {
Uri myUri = Uri.parse("file://" + path);
Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.putExtra(Intent.EXTRA_TEXT, "Hello");
shareIntent.putExtra(Intent.EXTRA_STREAM, myUri);
shareIntent.setType("image/jpeg");
shareIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(Intent.createChooser(shareIntent, "send"));
}

The image files have to be stored somewhere. I think your actual question is how to hide image files from the gallery app.
To hide them from your gallery app there are two ways doing this:
1. Create a .nomedia file:
In the folder where you save your images (given by uri) you have to create a file with the name .nomedia.
2. Prefix folder with a dot:
You can rename the folder itself with a dot. Example: .images.

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);
}
}

Saving bitmap to SdCard Android

I am writng a code to convert a png file back to bmp and save it on the sdcard. This is my current code.
FileInputStream in;
BufferedInputStream buf;
try {
in = new FileInputStream("File_Path_to_Read.png");
buf = new BufferedInputStream(in);
byte[] bMapArray= new byte[buf.available()];
buf.read(bMapArray);
Bitmap bMap = BitmapFactory.decodeByteArray(bMapArray, 0, bMapArray.length);
//Code segment to save on file
int numBytesByRow = bMap.getRowBytes() * bMap.getHeight();
ByteBuffer byteBuffer = ByteBuffer.allocate(numBytesByRow);
bMap.copyPixelsToBuffer(byteBuffer);
byte[] bytes = byteBuffer.array();
FileOutputStream fileOuputStream = new FileOutputStream("File_Path_To_Save.bmp");
fileOuputStream.write(bytes);
fileOuputStream.close();
if (in != null) {
in.close();
}
if (buf != null) {
buf.close();
}
} catch (Exception e) {
}
I am having problem in saving the bMap to the Sdcard. All the examples I found use bMap.compress(). Using this method I can't save as bmp. Can someone give an example on how to save the bitmap on the Sdcard?
Edit:
I can now save the file as .bmp to sdcard. However it won't get to the original size. Any sugguestions on converting the PNG to BMP?

File root = new File(Environment.getExternalStorageDirectory()
+ File.separator + "My_Folder" + File.separator);
root.mkdirs();
File myFile = new File(root, "ABC.jpg");
Bitmap bitmap = decodeFile(myFile, 800, 600);
OutputStream out = null;
File file = new File(mediaStorageDir.getAbsoluteFile() + "/DEF.jpg");
try {
out = new FileOutputStream(file);
bitmap .compress(Bitmap.CompressFormat.JPEG, 80, out);
out.flush();
out.close();
bitmap.recycle();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
public static Bitmap decodeFile(File f, int WIDTH, int HIGHT) {
try {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f), null, o);
// The new size we want to scale to
final int REQUIRED_WIDTH = WIDTH;
final int REQUIRED_HIGHT = HIGHT;
// Find the correct scale value. It should be the power of 2.
int scale = 2;
while (o.outWidth / scale / 2 >= REQUIRED_WIDTH
&& o.outHeight / scale / 2 >= REQUIRED_HIGHT)
scale *= 2;
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
} catch (FileNotFoundException e) {
}
return null;
}

android picture download

I return a Bitmap object according to a url, and the code for download picture:
URL url = new URL(imageUrlStr);
URLConnection conn = url.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream in = conn.getInputStream();
Bitmap bitmap = BitmapFactory.decodeStream(in);
in.close
Then I save it to sdcard. It is ok to save picture.
Now the problem is it download the picture A when use this url to access. But it now shows another B picture in SDCARD. How to solve this problem？

You can identify images by hash-code. Not a perfect solution, good for the demo
private Bitmap getBitmap(String url) {
String filename = String.valueOf(url.hashCode());
File f = new File(cacheDir, filename);
// from SD cache
Bitmap b = decodeFile(f);
if (b != null)
return b;
// from web
try {
Bitmap bitmap = null;
InputStream is = new URL(url).openStream();
OutputStream os = new FileOutputStream(f);
CopyStream(is, os);
os.close();
bitmap = decodeFile(f);
return bitmap;
} catch (Exception ex) {
ex.printStackTrace();
return null;
}
}
private void CopyStream(InputStream is, OutputStream os) {
final int buffer_size = 1024;
try {
byte[] bytes = new byte[buffer_size];
for (;;) {
int count = is.read(bytes, 0, buffer_size);
if (count == -1)
break;
os.write(bytes, 0, count);
}
} catch (Exception ex) {
}
}
/** decodes image and scales it to reduce memory consumption*/
private Bitmap decodeFile(File f) {
try {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPurgeable = true;
return BitmapFactory.decodeStream(new FileInputStream(f));
} catch (FileNotFoundException e) {
}
return null;
}
Use you just need to use method "getBitmap(String)" with your desired url as String