Develop Reference

ML Kit Android Studio java, how to Multible Images Text Recognition?

I have a folder with about 10 images which I like to OCR extract text.
That works excellent for 1 picture, but my java skills are not good enough to implement that for multiple images.
I'm really appreciate if someone could show me a clean solution for that.
Thanks a lot
br Lukas
TextView output1;
ArrayList<Bitmap> bitmapArray = new ArrayList<Bitmap>();
TextRecognizer recognizer = TextRecognition.getClient(TextRecognizerOptions.DEFAULT_OPTIONS);
private void OCR_list()
{
String path = Environment.getExternalStorageDirectory().toString()+"/folder_with_images";
File directory = new File(path);
File[] files = directory.listFiles();
for (int i = 0; i < files.length; i++) {
output1.setText(output1.getText() + ", " + files[i].getName());
File imgFile = files[i];
if (imgFile.exists()) {
bitmapArray.add(BitmapFactory.decodeFile(imgFile.getAbsolutePath()));
} else {
output1.setText(output1.getText()+"\n Bitmap not found!");
return;
}
}
InputImage image = InputImage.fromBitmap(bitmapArray.get(0), 0);
recognizer.process(image)
.addOnSuccessListener(
new OnSuccessListener<Text>() {
#Override
public void onSuccess(Text texts) {
processTextRecognitionResult(texts);
}
})
.addOnFailureListener(
new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
e.printStackTrace();
}
});
Edit:
I solved it now this way, but looks awful:
private void new_Recognition(InputImage image) {
recognizer.process(image)
.addOnSuccessListener(
new OnSuccessListener<Text>() {
#Override
public void onSuccess(Text texts) {
processTextRecognitionResult(texts);
bitmapArray.remove(0);
if (!bitmapArray.isEmpty()) {
InputImage image = InputImage.fromBitmap(bitmapArray.get(0), 0);
new_Recognition(image);
}
}
})
.addOnFailureListener(
new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
e.printStackTrace();
}
});
}

You can iterate on inputs directly, and recognition tasks will be queued up and then processed in order internally.
for (Bitmap input : inputs) {
recognizer.process(input)
.addOnSuccessListener(text -> ...)
}

Photo deleted but reappears when taking a new photo

The app I am making need to take pictures to send them to a server.
I need to take 6 photos at least. I have a recyclerView in which I am displaying a preview of my photo. It's working perfectly (I am using Picasso as photo library).
I need to be able to delete photos before sending them away (and consequently their preview). With a click on the preview, I remove it from my photo tab and update my recyclerview with notifyDataSetChanged().
The photo disappears.
When I take an other picture, I have its preview but the preview from the deleted picture is coming back.
If I delete three pictures and take a new one, I have the preview of the new one and the preview of the 3 deleted pictures.
Here's part of my adapter where I bind my view
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
mImageView = holder.mPhotoIV;
File mFile = new File(String.valueOf(Uri.parse(mListOfPhotos.get(position))));
int width = mImageView.getLayoutParams().width;
int height = mImageView.getLayoutParams().height;
Picasso.get()
.load(mFile)
.resize(200, 200)
.error(R.drawable.ic_no_photo_foreground)
.into(mImageView, new com.squareup.picasso.Callback() {
#Override
public void onSuccess() {
}
#Override
public void onError(Exception e) {
}
});
}
Here part of my activity where I'm calling my adapter
mTakePhotoFAB.setOnClickListener(view -> {
mDir = new File(getExternalCacheDir(), "PhotosAuthentifier");
boolean success = true;
if (!mDir.exists()) {
success = mDir.mkdir();
}
if (success) {
File mFile = new File(mDir, new SimpleDateFormat("yyyyMMdd-HHmmss", Locale.getDefault()).format(new Date()) + ".jpg");
mImageCapture.takePicture(mFile,
new ImageCapture.OnImageSavedListener() {
#Override
public void onImageSaved(#NonNull File file) {
mListOfPhotos.add(file.getAbsolutePath());
mNumberOfPhotoTV.setText(getResources().getString(R.string.minPhotos, mListOfPhotos.size()));
if (mListOfPhotos.size() >= 6) {
mSendPhotoFAB.setVisibility(View.VISIBLE);
}
mAdapter = new CameraPhotoAdapter(mListOfPhotos, getBaseContext());
mRecyclerView.setAdapter(mAdapter);
}
#Override
public void onError(#NonNull ImageCapture.ImageCaptureError imageCaptureError, #NonNull String message, #Nullable Throwable cause) {
String mMessage = "Photo capture failed: " + message;
Toast.makeText(CameraActivity.this, mMessage, Toast.LENGTH_SHORT).show();
assert cause != null;
cause.printStackTrace();
}
});
}
});
Function (in my adapter) to remove picture
protected void removePhoto(Context context, ArrayList<String> array, int position) {
File mDir = new File(context.getExternalCacheDir(), "PhotosAuthentifier");
File mFile = new File(array.get(position));
if (mDir.exists()) {
File[] mFilesIntoDir = mDir.listFiles();
if (mFilesIntoDir == null) {
return;
} else {
for (int i = 0; i < mFilesIntoDir.length; i++) {
if (mFilesIntoDir[i].getAbsolutePath().equals(mFile.getAbsolutePath())) {
boolean mSuccess = mFilesIntoDir[i].delete();
if (mSuccess) {
Picasso.get().invalidate(mFile.getAbsolutePath());
mListOfPhotos.remove(mFile.getAbsolutePath());
notifyDataSetChanged();
}
}
}
}
}
}
I tried to invalidate Picasso cache but when I take a new picture, instead of the deleted picture reappearing I have the default behavior when I don't have a good url to upload (a black cross)
Could anyone help please :)?

Sendbird group channel

Currently i have 2 users:
Tester1 and AnotherTester
I've been trying to create a public group channel using my Tester1
but whenever i try to create one.
It's not showing in my list using AnotherTester
Here is my code in creating public group channel
GroupChannelParams params = new GroupChannelParams()
.setPublic(true)
.setDiscoverable(true)
.setEphemeral(false)
// .addUserIds(users)
.setDistinct(false)
.setName(channelName);
GroupChannel.createChannel(params, new GroupChannel.GroupChannelCreateHandler() {
#Override
public void onResult(GroupChannel groupChannel, SendBirdException e) {
if (e != null) { // Error.
Toast.makeText(context, "" + e.getMessage(), Toast.LENGTH_SHORT).show();
Logs.logError(e.getMessage());
retrySendConnection(context, String.valueOf(e.getCode()), e.getMessage());
return;
} else {
// inviteUser(groupChannel);
Logs.logData(groupChannel.getUrl());
Intent i = new Intent(MainActivity.this, channelChatActivity.class);
i.putExtra("channelUrl", groupChannel.getUrl());
startActivity(i);
}
}
});
So Tester1 is the one that created a public group channel
but when i switch to AnotherTester, it doesn't show the public group channel.
Here is my code in retrieving AnotherTester channels
GroupChannelListQuery channelListQuery1 = GroupChannel.createMyGroupChannelListQuery();
channelListQuery1.setIncludeEmpty(true);
channelListQuery1.next(new GroupChannelListQuery.GroupChannelListQueryResultHandler() {
#Override
public void onResult(List<GroupChannel> list, SendBirdException e) {
if (e != null) {
Logs.logError(e.getMessage());// Error.
return;
} else {
groupChannelList.addAll(list);
groupChannelAdapter = new groupChannelAdapter(context, groupChannelList);
initializeRecyclerView(channelAdapter);
}
}
});
i hope you can help me.

You need to do atleast one message in that , then it will show to another user. Please try once to send one message.
Please try this code :-
private void createGroupChannel(List<String> userIds, boolean distinct, final String toID) {
GroupChannel.createChannelWithUserIds(userIds, distinct, "tsg-chat-" + SessionUtils.getCurrentMemberId(this) + "-" + toID, "", "", new GroupChannel.GroupChannelCreateHandler() {
#Override
public void onResult(GroupChannel groupChannel, SendBirdException e) {
if (e != null) {
// Error!
return;
}
}
});
}

Why is my ContentResolver batch operation only putting in 7 out of 21 entries?

I have three fragments in a FragmentPagerAdapter, and each of them would fetch a list of frames/data from a server using Volley. This data would later be used to update the Fragment's RecyclerView Adapter as a Cursor.
VolleyRestClientUtils.get(getString(R.string.PATH_SHOP), LOG_TAG, params, true, false, new JsonHttpResponseHandler() {
public void onSuccess(JSONObject response) {
Log.d(LOG_TAG, "request Response : " + response.toString());
try {
String status = response.getString("status");
if (RestClientUtils.STATUS_OK.equals(status)) {
final JSONArray frames = response.getJSONArray("items");
Log.d(LOG_TAG, "request Response : " + frames.length());
if (frames != null && frames.length() > 0) {
new AsyncTask<Void, Void, Boolean>() {
#Override
protected Boolean doInBackground(Void... voids) {
List<ContentValues> listShopFrame = ShopFrame.fromJSONArray(frames, sort);
if (listShopFrame.size() > 0 && isActivityActive()) {
ContentResolver cr = getActivity().getContentResolver();
if (!isRequestMore) {
cr.delete(ShopFrame.CONTENT_URI, ShopFrame.COLUMN_CATEGORY + "=?",
new String[]{sort});
paramSkip = frames.length();
} else {
paramSkip += frames.length();
}
ArrayList<ContentProviderOperation> operations = new ArrayList<>();
String log = listShopFrame.size()+" ";
for (int i = 0; i < listShopFrame.size(); i++) {
operations.add(ContentProviderOperation
.newInsert(ShopFrame.CONTENT_URI)
.withValues(listShopFrame.get(i))
.build());
log += listShopFrame.get(i).toString()+"\n";
}
Log.i("loader_callback_"+sort, log);
//cr.applyBatch(ShopFrame.CONTENT_AUTHORITY, operations);
ContentValues[] opsAsArray = new ContentValues[listShopFrame.size()];
listShopFrame.toArray(opsAsArray);
cr.bulkInsert(ShopFrame.CONTENT_URI, opsAsArray);
//return true;
}
return true;
}
#Override
protected void onPostExecute(Boolean result) {
dataRefreshed = true;
Log.i("loader_callback_"+sort, "response post execute");
if (result) {
loadSucceed();
PicMixApp.getInstance().setRefreshed(ShopFrameFragment.this.getClass().getName());
} else {
loadFailed(null);
}
}
}.execute();
} else {
//TODO
//Handle error
loadFailed(getString(R.string.err_load_s, getString(R.string.frame)));
}
} else if (VolleyRestClientUtils.STATUS_RESOURCE_NOT_FOUND.equals(status)) {
hasMore = false;
loadSucceed();
} else {
loadFailed(getString(R.string.err_load_s, getString(R.string.frame)));
}
} catch (Exception e) {
Log.e(LOG_TAG, "Exception:" + e.getMessage());
loadFailed(getString(R.string.err_load_s, getString(R.string.frame)));
}
}
#Override
public void onJSONError(String responseString) {
loadFailed(getString(R.string.err_load_s, getString(R.string.frame)));
}
#Override
public void onFailure(String errMessage, int statusCode, Map<String, String> headers, byte[] responseBytes) {
loadFailed(getString(R.string.err_load_s, getString(R.string.frame)));
}
});
Whereas loadSucceed() has this following code:
if (this.recyclerView != null) {
final RecyclerView.Adapter adapter = recyclerView.getAdapter();
if (adapter != null) {
adapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
#Override
public void onChanged() {
super.onChanged();
Log.i(DefaultRecyclerFragment.this.getClass().getName(), "onChanged");
adapter.unregisterAdapterDataObserver(this);
isLoading = false;
}
public void onItemRangeRemoved(int positionStart, int itemCount) {
Log.i(DefaultRecyclerFragment.this.getClass().getName(), "onItemRangeRemoved:" + positionStart + ", itemcount:" + itemCount);
adapter.unregisterAdapterDataObserver(this);
isLoading = false;
}
});
if (adapter instanceof CursorRecyclerAdapter && loadMoreView != null) {
((CursorRecyclerAdapter) adapter).removeFooter(loadMoreView);
}
}
}
I've put the code to initialize the loader in the onResume() method of each fragment:
int id = 100+Integer.valueOf(sort);
Loader l = getLoaderManager().getLoader(id);
Log.i("loader_callback_"+sort, "success loading volley "+l);
if(l == null) {
getLoaderManager().restartLoader(id, null, this);
}
My problem is that there seems to be some sort of race condition happening, that the currently viewed fragment's adapter seem to be updated twice, and sometimes thrice. The initial cursor fetched by the Fragment's Loader has 10 rows, sure, but after the update, most of the time it only has 7 of the 21 rows expected to be put in.
I thought all the ContentResolvers' operations are synchronous (can only be done one after another, not simultaneously). What's going on here?
EDIT: Should I just put the loader init code in the loadSuccess() callback?
EDIT2: I should note that these Fragments extend android.support.v4.app.Fragment, and I'm using the version 27.1.1 of the Support Library.

ownCloud Android DownloadRemoteFile File Name

I'm trying to download a list of RemoteFiles in Android using ownCloud. I can download the files perfectly fine but I'd like to notify the user when a file finishes. I'm downloading an entire directory:
#Override
public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
if (operation instanceof ReadRemoteFolderOperation) {
if (result.isSuccess()) {
Toast.makeText(this, "Finished reading folder", Toast.LENGTH_SHORT).show();
for (Object o : result.getData()) {
RemoteFile remoteFile = (RemoteFile) o;
String remotePath = remoteFile.getRemotePath();
File targetDirectory = new File(Environment.getExternalStorageDirectory().getAbsolutePath() +
"/owncloud_download");
downloadHelper.downloadFile(remoteFile, targetDirectory);
}
}
}
if (operation instanceof DownloadRemoteFileOperation) {
if (result.isSuccess()) {
// Notify the user here that the file finished
}
}
}
I've looked at the ownCloud library source but can't seem to find what a DownloadRemoteFileOperation returns as a result other than a boolean indicating success and an HTTP status code. I thought it might be in result.getLogMessage() but that just gives me an HTTP 200 status. How can I get the name of a file that's finished?
Edit: I also looked at result.getData() but that's null in a DownloadRemoteFileOperation.

Here's my workaround for the time being. I didn't want to modify the ownCloud library source (again) so instead I just do a check in onTransferProgress like so:
#Override
public void onTransferProgress(long rate, long transferred, long total, String fileName) {
if (transferred == total) {
runOnUiThread(new Runnable() {
// do the update here, file name is available
}
}
}
Here's another option. I needed the file being uploaded if the upload failed so I modified the ownCloud library source. This way I could return file names in the RemoteOperationResult.
RemoteOperationResult.java:
private String fileName;
public String getFileName() {
return fileName;
}
public void setFileName(String name) {
fileName = name;
}
DownloadRemoteFileOperation.java
#Override
protected RemoteOperationResult run(OwnCloudClient client) {
RemoteOperationResult result = null;
/// download will be performed to a temporal file, then moved to the final location
File tmpFile = new File(getTmpPath());
/// perform the download
try {
tmpFile.getParentFile().mkdirs();
int status = downloadFile(client, tmpFile);
result = new RemoteOperationResult(isSuccess(status), status,
(mGet != null ? mGet.getResponseHeaders() : null));
Log_OC.i(TAG, "Download of " + mRemotePath + " to " + getTmpPath() + ": " +
result.getLogMessage());
} catch (Exception e) {
result = new RemoteOperationResult(e);
Log_OC.e(TAG, "Download of " + mRemotePath + " to " + getTmpPath() + ": " +
result.getLogMessage(), e);
}
// Added this line
result.setFileName(mRemotePath);
return result;
}
UploadRemoteFileOperation.java:
#Override
protected RemoteOperationResult run(OwnCloudClient client) {
RemoteOperationResult result = null;
try {
// / perform the upload
synchronized (mCancellationRequested) {
if (mCancellationRequested.get()) {
throw new OperationCancelledException();
} else {
mPutMethod = new PutMethod(client.getWebdavUri() +
WebdavUtils.encodePath(mRemotePath));
}
}
int status = uploadFile(client);
if (mForbiddenCharsInServer){
result = new RemoteOperationResult(
RemoteOperationResult.ResultCode.INVALID_CHARACTER_DETECT_IN_SERVER);
} else {
result = new RemoteOperationResult(isSuccess(status), status,
(mPutMethod != null ? mPutMethod.getResponseHeaders() : null));
}
} catch (Exception e) {
// TODO something cleaner with cancellations
if (mCancellationRequested.get()) {
result = new RemoteOperationResult(new OperationCancelledException());
} else {
result = new RemoteOperationResult(e);
}
}
// Added this line
result.setFileName(mLocalPath);
return result;
}