Upgrade to Mlkit Beta

fixes #6

Author: mtotschnig

app/build.gradle

@@ -30,6 +30,7 @@ android {
         mlkit {
             dimension "engine"
             applicationIdSuffix ".mlkit"
+            minSdkVersion 19
         }
         tesseract {
             dimension "engine"
@@ -74,7 +75,7 @@ dependencies {
     implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.4.1'
     implementation 'androidx.exifinterface:exifinterface:1.3.3'
     testImplementation 'junit:junit:4.13.2'
-    mlkitImplementation 'com.google.android.gms:play-services-mlkit-text-recognition:18.0.0'
+    mlkitImplementation 'com.google.mlkit:text-recognition:16.0.0-beta3'
     tesseractImplementation 'cz.adaptech:tesseract4android:4.1.1'
     implementation 'com.jakewharton.timber:timber:5.0.1'
     implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.1"

app/src/mlkit/java/org/totschnig/ocr/OcrViewModel.kt

@@ -6,6 +6,7 @@ import android.net.Uri
 import androidx.lifecycle.viewModelScope
 import com.google.mlkit.vision.common.InputImage
 import com.google.mlkit.vision.text.TextRecognition
+import com.google.mlkit.vision.text.latin.TextRecognizerOptions
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
@@ -22,7 +23,7 @@ class OcrViewModel(application: Application) : BaseViewModel(application) {
                     }?.let {
                         InputImage.fromBitmap(it, getOrientation(uri))
                     }?.let {
-                        TextRecognition.getClient().process(it)
+                        TextRecognition.getClient(TextRecognizerOptions.DEFAULT_OPTIONS).process(it)
                             .addOnSuccessListener { texts ->
                                 result.postValue(Result.success(texts.wrap()))
                             }