Get text from image

dependencies {

  implementation 'com.google.android.gms:play-services-vision:15.0.2'

}

public class TextExtractUtil {

    public static String getText(Context context, ImageView imageView) {

        TextRecognizer textRecognizer = new TextRecognizer.Builder(context).build();

        Bitmap bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();

        Frame imageFrame = new Frame.Builder()

                .setBitmap(bitmap)

                .build();

        StringBuilder imageText = new StringBuilder();

        SparseArray<TextBlock> textBlocks = textRecognizer.detect(imageFrame);

        for (int i = 0; i < textBlocks.size(); i++) {

            TextBlock textBlock = textBlocks.get(textBlocks.keyAt(i));

            imageText.append(textBlock.getValue());

        }

        return String.valueOf(imageText);

    }

    public static String getText(Context context, Bitmap bitmap) {

        TextRecognizer textRecognizer = new TextRecognizer.Builder(context).build();

        Frame imageFrame = new Frame.Builder()

                .setBitmap(bitmap)

                .build();

        StringBuilder imageText = new StringBuilder();

        SparseArray<TextBlock> textBlocks = textRecognizer.detect(imageFrame);

        for (int i = 0; i < textBlocks.size(); i++) {

            TextBlock textBlock = textBlocks.get(textBlocks.keyAt(i));

            imageText.append(textBlock.getValue());

        }

        return String.valueOf(imageText);

    }

}

public class TextExtracterActivity extends AppCompatActivity {

    private ImageView mIVDocument;

    private TextView mTVResult;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_text_extracter);

        mIVDocument = findViewById(R.id.iv_document);

        mTVResult = findViewById(R.id.tv_result);

    }

    public void getText(View view) {

        mTVResult.setText(TextExtractUtil.getText(this,

                ((BitmapDrawable) mIVDocument.getDrawable()).getBitmap()));

    }

}

<?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"

    tools:context=".TextExtracterActivity">

    <ImageView

        android:id="@+id/iv_document"

        android:layout_width="wrap_content"

        android:layout_height="250dp"

        android:text="Hello World!"

        android:src="@drawable/document"/>

    <TextView

        android:id="@+id/tv_result"

        android:layout_below="@+id/iv_document"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" />

    <Button

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Get Text"

        android:layout_alignParentBottom="true"

        android:onClick="getText"/>

</RelativeLayout>