Develop Reference

How save the animated WebP Image into Android local storage?

How save the animated WebP Image into Android local storage?. I Wrote code to download webp images to Android local storage it is working fine to download static webp images but the problem comes into the picture when I tried to download the animated webp image. Only the first frame from the image gets saved
public void saveImage(Bitmap finaBitmap, String name, String identifier) {
String root = rootPath + File.separator + identifier;
File myDir = new File(root);
myDir.mkdirs();
File file = new File(myDir, name);
if (file.exists()) file.delete();
try {
FileOutputStream out = new FileOutputStream(file);
finalBitmap.compress(Bitmap.CompressFormat.WEBP, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}

I want to load an image using Picasso from a file path

I want to load an image from a file path which I have already defined, but don't want to instantiate another file object since I have already defined the path when saving the image.
I have tried retrieving the image with:
Picasso.with(this).load(filename).into(image_tv);
This is my code for saving the image;
Bitmap bitMapImg;
void saveImage() {
File filename;
try {
String path =
Environment.getExternalStorageDirectory().toString();
new File(path + "/folder/subfolder").mkdirs();
filename = new
File(path+"/folder/subfolder/image.jpg");
FileOutputStream out = new FileOutputStream(filename);
bitMapImg.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}

Use this
Picasso.with(context).load(Uri.parse("file://" + yourFilePath).into(imageView);

Save image in current view to sdcard using Android universal-image-loader

I'm a newbie Android developer. I have loaded an image using universal-image-loader and I would like to save it on my sd card. The file is created in the desired directory with the correct filename, but it always has a size of 0. What am I doing wrong?
A relevant snippet follows:
PS: The image already exists on disk, it's not being downloaded from the Internet.
private void saveImage(String imageUrls2, String de) {
String filepath = Environment.getExternalStorageDirectory()
.getAbsolutePath();
File SDCardRoot = Environment.getExternalStorageDirectory()
.getAbsoluteFile();
String filename = de;
File myDir = new File(SDCardRoot+"/testdir");
Bitmap mSaveBit = imageLoader.getMemoryCache();
File imageFile = null;
try {
//create our directory if it does'nt exist
if (!myDir.exists())
myDir.mkdirs();
File file = new File(myDir, filename);
if (file.exists())
file.delete();
FileOutputStream fileOutputStream = new FileOutputStream(file);
BufferedOutputStream bos = new BufferedOutputStream(fileOutputStream);
bos.flush();
bos.close();
} catch (IOException e) {
filepath = null;
e.printStackTrace();
Toast.makeText(getApplicationContext(),
R.string.diskful_error_message, Toast.LENGTH_LONG)
.show();
}
Log.i("filepath:", " " + filepath);
}

Yes, your code creates an file on sdcard_root/testdir/de only, and didn't write anything to it. Is "imageUrls2" the source image file? If yes, you can open that file with BufferedInputStream, read the data from BufferedInputStream, and copy them to output file with bos.write() before bos.flush() and bos.close().
Hope it helps.

Android, How to store image in internal storage?

I want to store bitmap image on internal storage (not external storage). I have written this code but it seems something has problem. Because when i download image from DDMS, I can't open it.
public String writeFileToInternalStorage(Context context, Bitmap outputImage) {
String fileName = Long.toString(System.currentTimeMillis()) + ".png";
try {
OutputStreamWriter osw = new OutputStreamWriter(context.openFileOutput(fileName, Context.MODE_PRIVATE));
osw.write(outputImage.toString());
Log.i(TAG, "Image stored at: " + fileName);
} catch (Exception e) {
Log.w(TAG, e.toString());
fileName = null;
}
return fileName;
}

outputImage.toString() is not the image :) the contant you put on the file is not the binary data, but some string!
A way to do it is this:
public String writeFileToInternalStorage(Context context, Bitmap outputImage) {
String fileName = Long.toString(System.currentTimeMillis()) + ".png";
final FileOutputStream fos = openFileOutput(fileName, Context.MODE_PRIVATE);
outputImage.compress(CompressFormat.PNG, 90, fos);
}
I coded directly into the browser, it is possible to have some syntax errors, but the code should work.

The problem is that you use .toString() instead of compressing the Bitmap into a FileOutputStream:
FileOutputStream out = new FileOutputStream(filename);
outputImage.compress(Bitmap.CompressFormat.PNG, 90, out);
The internal storage can be retrieved via the Context, too.
File cacheDir = context.getCacheDir();

StreamCorruptedException when reading Bitmap from SD card

I have a web service that returns a jpg. I read this jpg into a byte[], convert to a Bitmap, and save it to the SD card. The next time the user comes to this Activity, it will search the SD card to see if the image exists before hitting the web service.
However, the code that checks the SD card returns a StreamCorruptedException if the file exists.
Here is my code that writes to the SD card:
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
String root = Environment.getExternalStorageDirectory().toString();
new File(root + "/images").mkdirs();
try {
File file = new File(root + "/images", Integer.toString(intImageId) + "m.jpg");
FileOutputStream os = new FileOutputStream(file);
Bitmap theImageFromByteArray = BitmapFactory.decodeByteArray(image, 0, image.length);
theImageFromByteArray.compress(Bitmap.CompressFormat.JPEG, 80, os);
os.flush();
os.close();
}
catch (FileNotFoundException e) {
}
catch (IOException e) {
}
}
Here is my code that checks the SD card for the existing image:
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)
|| Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED_READ_ONLY)) {
try {
File file = new File(Environment.getExternalStorageDirectory() + "/images", Integer.toString(mImageId) + "m.jpg");
FileInputStream fis = new FileInputStream(file);
ObjectInputStream ois = new ObjectInputStream(fis);
mImage = (Bitmap)ois.readObject();
ois.close();
}
catch (Exception e) {
}
}
The exception happens during new ObjectInputStream(fis)

You cannot arbitrarily readObject() like this. writeObject() needs to be used in order for readObject() to detect a valid serialized object.