Android Studio – google.mlkit code never executes .addOnSuccessListener() and .addOnFailureListener()

I followed the istructions of the tutorial at com.google.codelab.mlkit.

Instead of using intent.data I am using FileProvider to get and analyze the full picture.

I replaced the virtural image in the emulation based on the recommendation in Android emulator camera custom image.

So I start my app (main activity), take a photo with the internal camera (which is the replaced virtual image) and get back to the main activity. I run into the code recognizeTextFromImage(), but I never run into .addOnSuccessListener() and .addOnFailureListener(). That surpises me because I even do not get a failure. Nothing is printed into the log.

I am using API-level 23 because the resultCode is 0 (instead of -1) if I am using a higher API.

My question is: why doesn’t my code run into .addOnSuccessListener() or at least into .addOnFailureListener() ?

1. Update

I tried "intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);“` and this changed the behavior. It took seconds to read the file. So I think @Danish was correct that the file was not created by the camera. But: same issue with addOnFailureListener(). Maybe the file is to big? Or did I send the wrong format? The Log says "W/e.codelab.mlki: Verification of java.lang.String com.google.codelab.mlkit.MainActivity.recognizeTextFromImage(com.google.mlkit.vision.common.InputImage) took 536.238ms"

2. Update

<?xml version="1.0" encoding="utf-8"?>

<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-files-path name="my_images" path="Pictures" />
</paths>

<?xml version="1.0" encoding="utf-8"?>


<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.google.codelab.mlkit">

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"  />
    <uses-feature
        android:name="android.hardware.camera"
        android:required="true"/>

    <queries>
        <intent>
            <action android:name="android.media.action.IMAGE_CAPTURE" />
        </intent>
    </queries>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity"
            android:screenOrientation="portrait"
            android:configChanges="keyboardHidden|orientation|screenSize">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <meta-data
            android:name="com.google.codelab.mlkit.vision.DEPENDENCIES"
            android:value="ocr" />
        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="${applicationId}.fileprovider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths">
            </meta-data>
        </provider>

    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layoutDescription="@xml/activity_main_scene"
    tools:context=".MainActivity" >

    <TableLayout
        android:layout_width="360dp"
        android:layout_height="539dp"
        android:layout_centerInParent="true">

        <TableRow
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TableLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <TableRow
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">

                    <TextView
                        android:id="@+id/textView_ServiceID"
                        android:layout_width="11dp"
                        android:layout_height="match_parent"
                        android:layout_weight="0.3"
                        android:gravity="center"
                        android:text="ServiceID"
                        android:textAlignment="viewStart" />

                    <EditText
                        android:id="@+id/editText_ServiceID"
                        android:layout_height="match_parent"
                        android:layout_weight="0.7
"
                        android:gravity="left"
                        android:inputType="text"
                        android:text="4711" />

                </TableRow>

            </TableLayout>
        </TableRow>

        <TableRow
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TableLayout
                android:layout_width="359dp"
                android:layout_height="match_parent">

                <TableRow
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">

                    <TextView
                        android:id="@+id/textView_Site"
                        android:layout_height="match_parent"
                        android:layout_weight="0.3"
                        android:gravity="center"
                        android:text="Site"
                        android:textAlignment="viewStart" />

                    <Spinner
                        android:id="@+id/spinner_Site"
                        android:layout_width="wrap_content"
                        android:layout_height="match_parent" />

                    <ImageButton
                        android:id="@+id/imageButton_Site"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        app:srcCompat="@drawable/ic_photo" />

                    <EditText
                        android:id="@+id/editText_Site"
                        android:layout_height="match_parent"
                        android:layout_weight="0.6"
                        android:inputType="text"
                        android:text="not yet reconized" />

                </TableRow>

 
            </TableLayout>

        </TableRow>

        <TableRow
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TableLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_gravity="end"  >

                <TableRow
                    android:layout_gravity="end"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"  >

                    <ImageButton
                        android:id="@+id/imageButton6"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        app:srcCompat="@drawable/ic_send" />

                    <ImageButton
                        android:id="@+id/imageButton7"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        app:srcCompat="@drawable/ic_save" />

                </TableRow>

            </TableLayout>
        </TableRow>

    </TableLayout>

</RelativeLayout>

package com.google.codelab.mlkit;

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
    private static final String TAG = "MainActivity";
    private ImageButton imageButton_Site;
    private EditText editText_Site;
    private Spinner spinner_Site;
    private InputImage createdImage;
    String recognizedText = "";
    String currentPhotoPath;
    static final int REQUEST_IMAGE_CAPTURE = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageButton_Site = findViewById(R.id.imageButton_Site);
        imageButton_Site.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dispatchTakePictureIntent();
            }
        });

        spinner_Site = findViewById(R.id.spinner_Site);
        String[] items = new String[]{"Chicago", "New York"}; // has to be retrieved from server based on GPS (satellite)
        ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_dropdown_item, items);
        spinner_Site.setAdapter(adapter);
        spinner_Site.setOnItemSelectedListener(this);
    }

    private void dispatchTakePictureIntent() {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        // Ensure that there's a camera activity to handle the intent
        if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
            // Create the File where the photo should go
            File photoFile = null;
            try {
                photoFile = createImageFile();
            } catch (IOException ex) {
                Toast.makeText(getApplicationContext(), "Error occurred while creating the File!",Toast.LENGTH_LONG).show();
            }
            // Continue only if the File was successfully created
            if (photoFile != null) {
                Uri photoURI = FileProvider.getUriForFile(this,
                        BuildConfig.APPLICATION_ID + ".fileprovider",
                        photoFile);
                if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
                    takePictureIntent.putExtra(Intent.EXTRA_RETURN_RESULT, true);
                    takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
                    takePictureIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); // new
                    startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
                }
            }
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult( requestCode, resultCode, data);
        // Log.d("OLR", "onActivityResult: "+ requestCode +" "+resultCode+" "+data);

        if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {

            Bitmap bitmap=BitmapFactory.decodeFile(currentPhotoPath);
            Bitmap imagebitmap=Bitmap.createBitmap(bitmap);//Just add this line and everything will work fine.I tried this code, its working like a charm.
            int check = bitmap.getWidth();
            InputImage inputImage = InputImage.fromBitmap(imagebitmap, 0);

            String text = recognizeTextFromImage(inputImage);
            if (text.isEmpty())
            {
                Toast.makeText(getApplicationContext(), "Nothing recognized. Please try again!",Toast.LENGTH_LONG).show();
                editText_Site.setText("Failed !");
            }
            else {
                editText_Site.setText(text);
            }
        }
        else {
            Toast.makeText(getApplicationContext(), "An issue occurred. Please inform app owner!",Toast.LENGTH_LONG).show();
        }
    }

    private File createImageFile() throws IOException {

        File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);

        // create directory if necessary
        if (!storageDir.exists()){
            storageDir.mkdir();
        }

        // Create an image file name
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",Locale.GERMANY).format(new Date());
        String imageFileName = "OLR_" + timeStamp + "_";
        File image = File.createTempFile(
                imageFileName,  // prefix
                ".jpg",   // suffix
                storageDir      // directory
        );

        // imageFile = image;
        currentPhotoPath = image.getAbsolutePath();

        return image;
    }

    private String recognizeTextFromImage(InputImage image) {

        TextRecognizer recognizer = TextRecognition.getClient(TextRecognizerOptions.DEFAULT_OPTIONS);
        Task<Text> task = recognizer.process(image);
        // recognizer.process(image)
        task
                .addOnSuccessListener(
                        new OnSuccessListener<Text>() {
                            @Override
                            public void onSuccess(Text texts) {
                                recognizedText = processTextRecognitionResult(texts);
                                Log.d(TAG,"Successful");
                            }
                        })

                /*.addOnSuccessListener(
                        new OnSuccessListener<Text>() {
                            @Override
                            public void onSuccess(Text texts) {
                                recognizedText = texts.getText();
                                editText_Site.setText(recognizedText);
                                Log.d(TAG,"Successful");
                            }
                        })*/
                .addOnFailureListener(
                        new OnFailureListener() {
                            @Override
                            public void onFailure(@NonNull Exception e) {
                                e.printStackTrace();
                                Log.d(TAG,"Not Successful");
                            }
                        });
        recognizer.close();
        return recognizedText;
    }

    private String processTextRecognitionResult(Text texts) {
        String recognizedText = "";
        List<Text.TextBlock> blocks = texts.getTextBlocks();
        if (blocks.size() == 0) {
            // No text found
        }
        else {
            for (int i = 0; i < blocks.size(); i++) {
                List<Text.Line> lines = blocks.get(i).getLines();
                for (int j = 0; j < lines.size(); j++) {
                    List<Text.Element> elements = lines.get(j).getElements();
                    for (int k = 0; k < elements.size(); k++) {
                        String elementText = elements.get(k).getText();
                        recognizedText = recognizedText + elementText;
                    }
                }
            }
        }
        return recognizedText;
    }
    private void showToast(String message) {
        Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
    }

    public void onItemSelected(AdapterView<?> parent, View v, int position, long id) {
        spinner_Site = findViewById(R.id.spinner_Site);
        editText_Site = findViewById(R.id.editText_Site);
        editText_Site.setText(spinner_Site.getSelectedItem().toString());
    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {
        // Do nothing
    }

}