Develop Reference

Firebase Uploader AsyncTask doinBackground() error android

I am using chat application. Upto Android 28sdk its worked fine but after i refract to androidx am facing this problem please check my code below and error screenshot.
Error Code Image 1
Error Code Image 2
private void compressAndUpload(final Context context, final String child, final File file) {
compressionTask = new AsyncTask<File, Void, String>() {
#Override
protected String doInBackground(File... files) {
String filePathCompressed = null;
Uri originalFileUri = Uri.fromFile(files[0]);
File tempFile = new File(context.getCacheDir(), originalFileUri.getLastPathSegment());
//tempFile = File.createTempFile(originalFileUri.getLastPathSegment(), null, context.getCacheDir());
if (child.equals("images")) {
filePathCompressed = SiliCompressor.with(context).compress(originalFileUri.toString(), tempFile);
} else {
try {
filePathCompressed = SiliCompressor.with(context).compressVideo(files[0].getPath(), context.getCacheDir().getPath());
} catch (URISyntaxException e) {
e.printStackTrace();
}
}
if (filePathCompressed == null)
filePathCompressed = "";
return filePathCompressed;
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
File compressed = new File(s);
fileUri = Uri.fromFile(compressed.length() > 0 ? compressed : file);
FirebaseStorage storage = FirebaseStorage.getInstance();
if (uploadRef == null)
uploadRef = storage.getReference().child(child).child(fileUri.getLastPathSegment());
if (replace) {
upload();
} else {
checkIfExists();
}
}
};
compressionTask.execute(file);
}

I want to save data in SecondActivity from FirstActivity using Room

I have three activities, I capture all data but one from DetailActivity upon button click and save in database using Room; My intention is to insert all these data into the database and start ReviewActivity so as to get the arraylist of reviews and also insert it in the database. Everything seems to work fine until when I want to view review offline because I believe it has been saved, reviews does not get loaded.
This is my DetailActivity,
TextView overview_tv; ImageView image_tv; TextView name_tv; TextView ratings; Context context; TextView release_date; ImageView backdrop_poster; private ExpandableHeightListView trailers; public static ArrayList<Youtube> youtube; public static ArrayList<Review> reviews; TrailerViewAdapter adapter; public static DataObject data; DataObject dataObject; ArrayList<Review> savedReview; private static final String IMAGE_URL = "http://image.tmdb.org/t/p/w185/"; private static final String THE_MOVIEDB_URL2 = "https://api.themoviedb.org/3/movie/"; private static final String MOVIE_QUERY2 = "api_key"; private static final String API_KEY2 = "6cc4f47bd4a64e0117e157b79072ae37"; private static String SEARCH_QUERY2 = "videos"; public static int movieId; Button viewReviews; Button favourite; String movieRating; private static final int YOUTUBE_SEARCH_LOADER = 23; private static final int REVIEW_SEARCH_LOADER = 24; File file; String name; String overview; String releaseDate; int switcher; public static ArrayList<Review> favouriteReviews; TextView trev; AppDatabase mDb; //Navigation arrow on the action bar #Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == android.R.id.home) { NavUtils.navigateUpFromSameTask(this); } return super.onOptionsItemSelected(item); } #Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_detail); mDb = AppDatabase.getInstance(getApplicationContext()); youtube = new ArrayList<Youtube>(); reviews = new ArrayList<Review>(); adapter = new TrailerViewAdapter(this, youtube); //Credit to Paolorotolo #github trailers = findViewById(R.id.expandable_list); trailers.setAdapter(adapter); trailers.setExpanded(true); //Navigation arrow on the acton bar; check also override onOptionsItemSelected ActionBar actionBar = this.getSupportActionBar(); if (actionBar != null) { actionBar.setDisplayHomeAsUpEnabled(true); } context = getApplicationContext(); Intent intent = getIntent(); if (intent == null) { closeOnError(); } switcher = getIntent().getIntExtra("switch", 3); overview_tv = findViewById(R.id.overview); image_tv = findViewById(R.id.image); name_tv = findViewById(R.id.name); ratings = findViewById(R.id.ratings); release_date = findViewById(R.id.release_date); backdrop_poster = findViewById(R.id.backdrop_poster); trev = findViewById(R.id.review_show); viewReviews = findViewById(R.id.review_button); favourite = findViewById(R.id.favourite_button); addListenerOnRatingBar(ratings); if (switcher != 2) { favourite.setVisibility(View.INVISIBLE); dataObject = (DataObject) getIntent().getParcelableExtra("array"); final String favouriteName = dataObject.getName(); final String favouriteOverview = dataObject.getOverview(); final String favouriteReleaseDate = dataObject.getReleaseDate(); ArrayList<Youtube> savedTrailer = dataObject.getTrailers(); savedReview = dataObject.getMovieReviews(); movieRating = dataObject.getRating(); name_tv.setText(favouriteName); overview_tv.setText(favouriteOverview); ratings.setText("Rating: " + movieRating); release_date.setText("Release Date: " + favouriteReleaseDate);// Toast.makeText(this, "Testing Reviews " + savedReview.get(0).getAuthor(), Toast.LENGTH_SHORT).show(); String imagePath = name_tv.getText().toString() + "0i"; String backdropPath = name_tv.getText().toString() + "1b"; try { DataObjectAdapter.downloadImage(imagePath, image_tv, this); } catch (Exception e) { e.printStackTrace(); } try { DataObjectAdapter.downloadImage(backdropPath, backdrop_poster, context); } catch (Exception e) { e.printStackTrace(); } if (savedTrailer != null) { TrailerViewAdapter lv = new TrailerViewAdapter(DetailActivity.this, savedTrailer); trailers.setAdapter(lv); switcher = 3; } } else { name = getIntent().getStringExtra("Name"); overview = getIntent().getStringExtra("Overview"); final String image = getIntent().getStringExtra("Image"); movieId = getIntent().getIntExtra("movieId", 1); final String backdrop = getIntent().getStringExtra("backdrop"); releaseDate = getIntent().getStringExtra("releaseDate"); movieRating = getIntent().getStringExtra("rating"); Log.i("this", "switch " + switcher); name_tv.setText(name); overview_tv.setText(overview); ratings.setText("Rating: " + movieRating); release_date.setText("Release Date: " + releaseDate); //load backdrop poster Picasso.with(context) .load(IMAGE_URL + backdrop) .fit() .placeholder(R.drawable.placeholder_image) .error(R.drawable.placeholder_image) .into(backdrop_poster); Picasso.with(context) .load(IMAGE_URL + image) .fit() .placeholder(R.drawable.placeholder_image) .error(R.drawable.placeholder_image) .into(image_tv); getSupportLoaderManager().initLoader(YOUTUBE_SEARCH_LOADER, null, this); //getSupportLoaderManager().initLoader(REVIEW_SEARCH_LOADER, null, this); //loadTrailers(); //loadReviews(); //populateKeys(); } /** * Here manages the views(list) for reviews */ viewReviews.setOnClickListener(new View.OnClickListener() { #Override public void onClick(View v) { if (switcher == 3) { startActivity(new Intent(DetailActivity.this, ReviewActivity.class) .putExtra("switch", 3)); } else { Log.i("this", "I am from initial" + switcher); startActivity(new Intent(DetailActivity.this, ReviewActivity.class).putExtra("id", movieId)); } } } ); favourite.setOnClickListener(new View.OnClickListener() { #Override public void onClick(View v) { data = new DataObject(); data.setName(name); data.setOverview(overview); data.setRating(movieRating); data.setReleaseDate(releaseDate); data.setTrailers(youtube);// data.setMovieReviews(reviews); try { saveImage(name_tv.getText().toString() + "0i", image_tv); saveImage(name_tv.getText().toString() + "1b", backdrop_poster); } catch (IOException e) { e.printStackTrace(); } Toast.makeText(context, "The movie is saved as a favourite", Toast.LENGTH_LONG).show(); AppExecutors.getInstance().diskIO().execute(new Runnable() { #Override public void run() { mDb.dataDao().insertData(data); } }); startActivity(new Intent(DetailActivity.this, ReviewActivity.class).putExtra("id", movieId) .putExtra(ReviewActivity.EXTRA_DATA_ID, 20)); } } ); }
And my ReviewActivity
public class ReviewActivity extends AppCompatActivity implements LoaderManager.LoaderCallbacks<ArrayList<Review>>{ public static ArrayList<Review> reviews; public static List<DataObject> favouriteReviews; public static RecyclerView reviewList; ArrayList<Review> r; private static final int REVIEW_SEARCH_LOADER = 24; private static final String MOVIE_QUERY3 = "api_key"; private static final String API_KEY3 = "6cc4f47bd4a64e0117e157b79072ae37"; private static String SEARCH_QUERY3 = "reviews"; private static final String THE_MOVIEDB_URL3 = "https://api.themoviedb.org/3/movie/"; private static int movId; public static final String EXTRA_DATA_ID = "extraDataId"; private static final int DEFAULT_TASK_ID = -1; private int mTaskId = DEFAULT_TASK_ID; DataObject data1; AppDatabase mDb; ReviewAdapter revAdapter; int loaderSwitch; #Override protected void onResume() { super.onResume(); } #Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_review); mDb = AppDatabase.getInstance(getApplicationContext()); reviews = new ArrayList<Review>(); favouriteReviews = new ArrayList<DataObject>(); reviewList = findViewById(R.id.review_list); LinearLayoutManager layoutManager = new LinearLayoutManager(getApplicationContext()); reviewList.setLayoutManager(layoutManager); reviewList.setHasFixedSize(true); int switcher = getIntent().getIntExtra("switch", 1); Intent intent = getIntent(); if (intent == null) { finish(); } Log.i("this", "swithcer " + switcher); Log.i("this loader", "Loader " + loaderSwitch); if (switcher == 3){ DataObject dataObject = (DataObject) getIntent().getParcelableExtra("ArrayOfReviews"); if (dataObject != null){ ArrayList<Review> movieReviews = dataObject.getMovieReviews(); Toast.makeText(this, "There are reviews saved", Toast.LENGTH_LONG).show(); revAdapter = new ReviewAdapter(this, movieReviews ); reviewList.setAdapter(revAdapter); } } else { movId = getIntent().getIntExtra("id", 20); revAdapter = new ReviewAdapter(this, reviews); reviewList.setAdapter(revAdapter); loadReviews(); //populateReview(); } DividerItemDecoration decoration = new DividerItemDecoration(this, VERTICAL); reviewList.addItemDecoration(decoration); } #Override protected void onStart() { super.onStart(); //loadReviews(); } public static URL buildUrl3(String stringUrl) { Uri uri = Uri.parse(THE_MOVIEDB_URL3).buildUpon() .appendPath(stringUrl) .appendPath(SEARCH_QUERY3) .appendQueryParameter(MOVIE_QUERY3, API_KEY3) .build(); URL url = null; try { url = new URL(uri.toString()); } catch (MalformedURLException exception) { Log.e(TAG, "Error creating URL", exception); } return url; } public void loadReviews(){ // COMPLETED (19) Create a bundle called queryBundle Bundle queryBundle = new Bundle(); // COMPLETED (20) Use putString with SEARCH_QUERY_URL_EXTRA as the key and the String value of the URL as the value// queryBundle.putString(SEARCH_QUERY_URL_EXTRA, url.toString()); // COMPLETED (21) Call getSupportLoaderManager and store it in a LoaderManager variable LoaderManager loaderManager = getSupportLoaderManager(); // COMPLETED (22) Get our Loader by calling getLoader and passing the ID we specified Loader<ArrayList<Review>> movieReviews = loaderManager.getLoader(REVIEW_SEARCH_LOADER); // COMPLETED (23) If the Loader was null, initialize it. Else, restart it. if (movieReviews == null) { loaderManager.initLoader(REVIEW_SEARCH_LOADER, queryBundle, this); } else { loaderManager.restartLoader(REVIEW_SEARCH_LOADER, queryBundle, this); } } #Override public Loader<ArrayList<Review>> onCreateLoader(int id, Bundle args) { return new AsyncTaskLoader<ArrayList<Review>>(this) { #Override protected void onStartLoading() { super.onStartLoading(); forceLoad(); } #Override public ArrayList<Review> loadInBackground() { String g = String.valueOf(movId); // Create URL object URL url = buildUrl3(g); // Perform HTTP request on the URL and receive a JSON response back String jsonResponse = ""; try { jsonResponse = getResponseFromHttpUrl(url); } catch (Exception e) { e.printStackTrace(); } reviews = MovieJsonUtils.parseReview(jsonResponse); return reviews; } }; } #Override public void onLoadFinished(Loader<ArrayList<Review>> loader, ArrayList<Review> dat) { if (reviews != null) { Intent intent = getIntent(); if (intent != null && intent.hasExtra(EXTRA_DATA_ID)) { //mButton.setText(R.string.update_button); if (mTaskId == DEFAULT_TASK_ID) { mTaskId = intent.getIntExtra(EXTRA_DATA_ID, DEFAULT_TASK_ID); AppExecutors.getInstance().diskIO().execute(new Runnable() { #Override public void run() { data.setMovieReviews(reviews); mDb.dataDao().updateData(data); //mDb.dataDao().insertData(data); final List<DataObject> task = mDb.dataDao().loadById(mTaskId); runOnUiThread(new Runnable() { #Override public void run() { populateUI(task); } }); } }); } } else { ReviewAdapter lv = new ReviewAdapter(ReviewActivity.this, reviews); reviewList.setAdapter(lv); } } } #Override public void onLoaderReset(Loader<ArrayList<Review>> loader) { }
Data gets loaded from MainActivity, the saved data is passed on to other activities as a parcellable bundle via intent, the passed data is displayed in DetailActivity but not in ReviewActivity.
Alternatively, if I can load reviews alongside YouTube keys from DetailActivity, I believe I can handle the database issue from there, but two Loaders wouldn't just work together, the app crashes; I am aware two AsyncTasks concurrently run together solved this problem, but I prefer to use Loaders because of performance on configuration change

Storing a string on mobile device using gluon mobile plugin

I want to save a string from a TextArea to the device and then reload it after reopening the app. I have tried following the examples (link) but cant get it to work. Main problem arises when i try to read the file and use a StringInputConverter.
private void saveAndLoad(TextArea textArea){
File textFile = new File(ROOT_DIR,"text_file");
String text2 = textArea.getText();
String loadedFile = "none";
if (textFile.exists()){
FileClient fileClient = FileClient.create(textFile);
loadedFile = DataProvider.retrieveObject(fileClient.createObjectDataReader(
new StringInputConverter()));
}
try(FileWriter writer = new FileWriter(textFile)){
writer.write(textArea.getText());
} catch (IOException e) {
e.printStackTrace();
}
textArea.setText(text2);
}
Edit: inserted code which i tried to start reading file with and image of the error i am getting

If you check the DataProvider::retrieveObject documentation:
Retrieves an object using the specified ObjectDataReader. A GluonObservableObject is returned, that will contain the object when the read operation completed successfully.
It returns GluonObservableObject<String>, which is an observable wrapper of the string, not the string itself.
You need to get first the observable, and when the operation ends successfully you can retrieve the string:
if (textFile.exists()) {
FileClient fileClient = FileClient.create(textFile);
GluonObservableObject<String> retrieveObject = DataProvider
.retrieveObject(fileClient.createObjectDataReader(new StringInputConverter()));
retrieveObject.stateProperty().addListener((obs, ov, nv) -> {
if (ConnectState.SUCCEEDED.equals(nv)) {
loadedFile = retrieveObject.get();
}
});
}
This is a quick implementation of this functionality:
public class BasicView extends View {
private static final File ROOT_DIR;
static {
ROOT_DIR = Services.get(StorageService.class)
.flatMap(StorageService::getPrivateStorage)
.orElseThrow(() -> new RuntimeException("Error"));
}
private final File textFile;
private final TextField textField;
private String loadedFile = "none";
public BasicView(String name) {
super(name);
textFile = new File(ROOT_DIR, "text_file");
textField = new TextField();
VBox controls = new VBox(15.0, textField);
controls.setAlignment(Pos.CENTER);
controls.setPadding(new Insets(30));
setCenter(controls);
}
#Override
protected void updateAppBar(AppBar appBar) {
appBar.setNavIcon(MaterialDesignIcon.MENU.button(e -> System.out.println("Menu")));
appBar.setTitleText("Basic View");
appBar.getActionItems().add(MaterialDesignIcon.SAVE.button(e -> save()));
appBar.getActionItems().add(MaterialDesignIcon.RESTORE_PAGE.button(e -> restore()));
}
private void save() {
try (FileWriter writer = new FileWriter(textFile)) {
writer.write(textField.getText());
} catch (IOException ex) {
ex.printStackTrace();
}
}
private void restore() {
if (textFile.exists()) {
FileClient fileClient = FileClient.create(textFile);
GluonObservableObject<String> retrieveObject = DataProvider
.retrieveObject(fileClient.createObjectDataReader(new StringInputConverter()));
retrieveObject.stateProperty().addListener((obs, ov, nv) -> {
if (ConnectState.SUCCEEDED.equals(nv)) {
loadedFile = retrieveObject.get();
textField.setText(loadedFile);
}
});
}
}
}

Android ANR Multithreading

So I'm working on a project which needs to cut up a video into multiple frames, and save them as Bitmaps on the device.
I'm using FFmpegMediaMetadataRetriever.getFrameAtTime() to obtain the individual frames, which is working, but is slow. To speed it up a bit I'm trying to implement multiple worker threads which go off and grab the frames, finally responding back to UI via an anonymous function.
I have a class MyVideoProcessor which handles the video processing, and this is called from my EditVideoActivity.
The threads start, and start processing, but shortly afterwards the EditVideoActivity dies (ANR).
From what I can see, there is nothing running on UI (apart from at the very end (which I confirm only runs once)) so not sure why the UI thread is being held up by the worker threads.
EDIT:
So I've switched out FFmpegMediaMetadataRetriever for the standard MediaMetadataRetriever and everything works. BUT I need to use FFmpegMediaMetadataRetriever, as the OPTION_CLOSEST in MMR doesn't work as it should.
EditVideoActivity:
if (mBackgroundThread==null || !mBackgroundThread.isAlive()) {
mBackgroundThread = new Thread(mMyVideoProcessor);
mBackgroundThread.start();
}
MyVideoProcessor:
public class MyVideoProcessor implements Runnable {
private static final String TAG = MyVideoProcessor.class.getSimpleName();
private MyVideo mMyVideo;
private final Context mContext;
public static final int FRAME_CUT_DURATION = 200;
private int mStartFrom = 0;
private int mCurrentDuration = 0;
private int mVideoDuration = 0;
private ArrayList<OnFrameUpdateListener> listeners = new ArrayList<>();
private ExecutorService mProcessors = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
public MyVideoProcessor(Context context, MyVideo myVideo) {
mContext = context;
mMyVideo = myVideo;
}
public void setOnFrameUpdateListener(OnFrameUpdateListener listener) {
listeners.add(listener);
}
public int getCurrentDuration() {
return mCurrentDuration;
}
public void setStartFrom(int startFrom) {
mStartFrom = startFrom;
}
#Override
public void run() {
if (!mMyVideo.getProcessed()) {
FFmpegMediaMetadataRetriever retriever = new FFmpegMediaMetadataRetriever();
retriever.setDataSource(mContext.getExternalFilesDir(null) + File.separator + mMyVideo.getVideo());
String time = retriever.extractMetadata(FFmpegMediaMetadataRetriever.METADATA_KEY_DURATION);
retriever.release();
mVideoDuration = Integer.parseInt(time);
int i = 0;
if (mStartFrom > 0) {
Log.d(TAG,"Attempting restore");
i = mStartFrom+1;
}
for ( i=i;i<mVideoDuration;i+=FRAME_CUT_DURATION) {
mProcessors.execute(new ExtractImageExecutor(i));
}
}
}
public class ExtractImageExecutor implements Runnable {
private int mTime;
public ExtractImageExecutor(int time) {
mTime = time;
}
#Override
public void run() {
FFmpegMediaMetadataRetriever retriever = new FFmpegMediaMetadataRetriever();
retriever.setDataSource(mContext.getExternalFilesDir(null) + File.separator + mMyVideo.getVideo());
mCurrentDuration = mTime;
long startTime = System.currentTimeMillis();
Bitmap bitmap = retriever.getFrameAtTime(mTime*1000, FFmpegMediaMetadataRetriever.OPTION_CLOSEST);
long endTime = System.currentTimeMillis();
Log.d(TAG, "Took: " + ((endTime - startTime) / 1000f));
if (bitmap != null) {
try {
int thisFrame = 0;
if (mTime>0) {
thisFrame = mTime/FRAME_CUT_DURATION;
}
//noinspection StringBufferReplaceableByString
StringBuilder frameFilename = new StringBuilder();
frameFilename.append("VIDEO_");
frameFilename.append(thisFrame).append("_");
frameFilename.append(new SimpleDateFormat("yyyyMMddHHmm", Locale.UK).format(new Date()));
frameFilename.append(".jpg");
File frameFile = new File(mContext.getExternalFilesDir(null), frameFilename.toString());
FileOutputStream fos = new FileOutputStream(frameFile);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
fos.close();
mMyVideo.addFrame(thisFrame, frameFile);
/*for (OnFrameUpdateListener listener : listeners) {
listener.onFrameUpdate(mMyVideo);
}*/
} catch (FileNotFoundException e) {
Log.d(TAG, "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d(TAG, "Error accessing file: " + e.getMessage());
}
}
retriever.release();
if ((mTime+FRAME_CUT_DURATION) > mVideoDuration) {
mMyVideo.setProcessed(true);
for (OnFrameUpdateListener listener : listeners) {
listener.onFrameUpdate(mMyVideo);
}
}
}
}
}
EditVideoActivity:
public class EditVideoActivity extends Activity {
private static final String TAG = EditVideoActivity.class.getSimpleName();
private ImageView mImageView;
private MyVideo mMyVideo;
private MyVideoProcessor mMyVideoProcessor;
private Thread mBackgroundThread;
private int mCurrentDuration = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit_video);
String videoFilename = getIntent().getStringExtra("videoFilename");
if (videoFilename != null) {
mMyVideo = new MyVideo(MyVideo.TYPE_EXTERIOR,"TEST",new File(videoFilename));
mMyVideoProcessor = new MyVideoProcessor(this,mMyVideo);
} else {
Log.d(TAG, "There was a problem with the video file");
}
}
#Override
protected void onSaveInstanceState(Bundle outState) {
Log.d(TAG,"Saving Instance State");
outState.putParcelable("video", mMyVideo);
outState.putInt("currentDuration", mMyVideoProcessor.getCurrentDuration());
super.onSaveInstanceState(outState);
}
#Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
Log.d(TAG,"Restoring Instance State");
super.onRestoreInstanceState(savedInstanceState);
mMyVideo = (MyVideo) savedInstanceState.getParcelable("video");
mCurrentDuration = savedInstanceState.getInt("currentDuration");
}
#Override
protected void onResume() {
super.onResume();
mMyVideoProcessor = new MyVideoProcessor(this,mMyVideo);
final TextView totalFrames = (TextView) findViewById(R.id.totalFrames);
mImageView = (ImageView) findViewById(R.id.imageView2);
final SeekBar seekBar = (SeekBar) findViewById(R.id.seekBar);
final ProgressBar progressBar = (ProgressBar) findViewById(R.id.progressBar);
progressBar.animate();
seekBar.setEnabled(false);
OnFrameUpdateListener onFrameUpdateListener = new OnFrameUpdateListener() {
#Override
public void onFrameUpdate(final MyVideo myVideo) {
if (myVideo.getProcessed()) {
File lastFrame = myVideo.getLastFrame();
totalFrames.setText(myVideo.getTotalFrames()+"");
mImageView.setImageBitmap(BitmapFactory.decodeFile(lastFrame.getAbsolutePath()));
seekBar.setEnabled(true);
progressBar.setVisibility(View.GONE);
}
}
};
mMyVideoProcessor.setOnFrameUpdateListener(onFrameUpdateListener);
if (mBackgroundThread==null || !mBackgroundThread.isAlive()) {
mBackgroundThread = new Thread(mMyVideoProcessor);
mBackgroundThread.start();
}
}
}

How to read text from an image using OCR in android

I want to implement OCR in Android. I.e. getting texts from a business card image. I used code from here.
But when I run this code I got the following error:
java.lang.NoClassDefFoundError:
org.apache.http.entity.mime.content.FileBody
I think it points to the following line:
final FileBody image = new FileBody(new File(filePath));
of the OCRServiceAPI class. How can I fix this?

Can't guess about your above error but I have done this task in Blackberry by using third party application ABBYY product of OCR on PHP server.
During my long R & D I have also worked on the below link of Github_Abbyy.
For using this code you should create a free account here: ocrsdk.com

Not all the Apache packages are available by default in Android, so you will have to download them from the Apache repositories and include those yourself. See the question Android libraries not found and the links provided in the answer there.
Edit: Specifically the sub-packages of org.apache.http.entity are not included, only the entity package itself.
In the example project given by the OCR API they have placed the mime package in a jar in the lib folder.

Checkout that whether you are getting correct path of the image which are selecting from the gallery.
I have also tried this demo and its working fine for me.
Here I'm posting my code:
OCRServiceAPI.java
public class OCRServiceAPI {
public final String m_serviceUrl = "http://api.ocrapiservice.com/1.0/rest/ocr";
private final String m_paramImage = "image";
private final String m_paramLanguage = "language";
private final String m_paramApiKey = "apikey";
private String m_apiKey, m_responseText;
private int m_responseCode;
public OCRServiceAPI(final String p_apiKey) {
this.m_apiKey = p_apiKey;
}
/*
* Convert image to text.
*
* #param language The image text language.
*
* #param filePath The image absolute file path.
*
* #return true if everything went okay and false if there is an error with
* sending and receiving data.
*/
public boolean convertToText(final String p_language,
final String p_filePath) {
try {
sendImage(p_language, p_filePath);
return true;
} catch (ClientProtocolException e) {
e.printStackTrace();
return false;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
/*
* Send image to OCR service and read response.
*
* #param language The image text language.
*
* #param filePath The image absolute file path.
*/
private void sendImage(final String p_language, final String p_filePath)
throws ClientProtocolException, IOException {
final HttpClient m_httpclient = new DefaultHttpClient();
final HttpPost m_httppost = new HttpPost(m_serviceUrl);
final FileBody m_image = new FileBody(new File(p_filePath));
final MultipartEntity m_reqEntity = new MultipartEntity();
m_reqEntity.addPart(m_paramImage, m_image);
m_reqEntity.addPart(m_paramLanguage, new StringBody(p_language));
m_reqEntity.addPart(m_paramApiKey, new StringBody(getApiKey()));
m_httppost.setEntity(m_reqEntity);
final HttpResponse m_response = m_httpclient.execute(m_httppost);
final HttpEntity m_resEntity = m_response.getEntity();
final StringBuilder m_sb = new StringBuilder();
if (m_resEntity != null) {
final InputStream m_stream = m_resEntity.getContent();
byte m_bytes[] = new byte[4096];
int m_numBytes;
while ((m_numBytes = m_stream.read(m_bytes)) != -1) {
if (m_numBytes != 0) {
m_sb.append(new String(m_bytes, 0, m_numBytes));
}
}
}
setResponseCode(m_response.getStatusLine().getStatusCode());
setResponseText(m_sb.toString());
}
public int getResponseCode() {
return m_responseCode;
}
public void setResponseCode(int p_responseCode) {
this.m_responseCode = p_responseCode;
}
public String getResponseText() {
return m_responseText;
}
public void setResponseText(String p_responseText) {
this.m_responseText = p_responseText;
}
public String getApiKey() {
return m_apiKey;
}
public void setApiKey(String p_apiKey) {
this.m_apiKey = p_apiKey;
} }
SampleActivity.java
public class SampleActivity extends Activity implements OnClickListener {
private final int RESPONSE_OK = 200;
private final int IMAGE_PICKER_REQUEST = 1;
private TextView m_tvPicNameText;
private EditText m_etLangCodeField, m_etApiKeyFiled;
private String m_apiKey; // T7GNRh7VmH
private String m_langCode; // en
private String m_fileName;
#Override
public void onCreate(Bundle p_savedInstanceState) {
super.onCreate(p_savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
m_tvPicNameText = (TextView) findViewById(R.id.imageName);
m_etLangCodeField = (EditText) findViewById(R.id.lanuageCode);
m_etApiKeyFiled = (EditText) findViewById(R.id.apiKey);
m_etApiKeyFiled.setText("T7GNRh7VmH");
final Button m_btnPickImage = (Button) findViewById(R.id.picImagebutton);
m_btnPickImage.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// Starting image picker activity
startActivityForResult(
new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI),
IMAGE_PICKER_REQUEST);
}
});
final Button m_btnConvertText = (Button) findViewById(R.id.convert);
m_btnConvertText.setOnClickListener(this);
}
public void onClick(View p_v) {
m_apiKey = m_etApiKeyFiled.getText().toString();
m_langCode = m_etLangCodeField.getText().toString();
// Checking are all fields set
if (m_fileName != null && !m_apiKey.equals("")
&& !m_langCode.equals("")) {
final ProgressDialog m_prgDialog = ProgressDialog.show(
SampleActivity.this, "Loading ...", "Converting to text.",
true, false);
final Thread m_thread = new Thread(new Runnable() {
public void run() {
final OCRServiceAPI m_apiClient = new OCRServiceAPI(
m_apiKey);
m_apiClient.convertToText(m_langCode, m_fileName);
// Doing UI related code in UI thread
runOnUiThread(new Runnable() {
public void run() {
m_prgDialog.dismiss();
// Showing response dialog
final AlertDialog.Builder m_alert = new AlertDialog.Builder(
SampleActivity.this);
m_alert.setMessage(m_apiClient.getResponseText());
m_alert.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(
DialogInterface p_dialog,
int p_id) {
}
});
// Setting dialog title related from response code
if (m_apiClient.getResponseCode() == RESPONSE_OK) {
m_alert.setTitle("Success");
} else {
m_alert.setTitle("Faild");
}
m_alert.show();
}
});
}
});
m_thread.start();
} else {
Toast.makeText(SampleActivity.this, "All data are required.",
Toast.LENGTH_SHORT).show();
}
}
#Override
protected void onActivityResult(int p_requestCode, int p_resultCode,
Intent p_data) {
super.onActivityResult(p_requestCode, p_resultCode, p_data);
if (p_requestCode == IMAGE_PICKER_REQUEST && p_resultCode == RESULT_OK) {
m_fileName = getRealPathFromURI(p_data.getData());
m_tvPicNameText.setText("Selected: en"
+ getStringNameFromRealPath(m_fileName));
}
}
/*
* Returns image real path.
*/
private String getRealPathFromURI(final Uri p_contentUri) {
final String[] m_proj = { MediaStore.Images.Media.DATA };
final Cursor m_cursor = managedQuery(p_contentUri, m_proj, null, null,
null);
int m_columnIndex = m_cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
m_cursor.moveToFirst();
return m_cursor.getString(m_columnIndex);
}
/*
* Cuts selected file name from real path to show in screen.
*/
private String getStringNameFromRealPath(final String bucketName) {
return bucketName.lastIndexOf('/') > 0 ? bucketName
.substring(bucketName.lastIndexOf('/') + 1) : bucketName;
} }