I’m a new android developer and trying to make image to text app. I watched some tutorials and pretty sure that i don’t make any mistakes. I’m using ML Kit for this project and got error when i tried to convert the image to text.
My main activity
package com.gorkemtand.textrecognition;
import androidx.activity.result.ActivityResult;
import androidx.activity.result.ActivityResultCallback;
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContract;
import androidx.activity.result.contract.ActivityResultContracts;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import android.Manifest;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.PopupMenu;
import android.widget.Toast;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.gms.tasks.Task;
import com.google.android.material.button.MaterialButton;
import com.google.android.material.imageview.ShapeableImageView;
import com.google.mlkit.vision.common.InputImage;
import com.google.mlkit.vision.text.Text;
import com.google.mlkit.vision.text.TextRecognition;
import com.google.mlkit.vision.text.TextRecognizer;
import com.google.mlkit.vision.text.latin.TextRecognizerOptions;
import java.io.IOException;
import java.security.Permission;
public class MainActivity extends AppCompatActivity {
private MaterialButton inputImageBtn;
private MaterialButton recognizeTextBtn;
private ShapeableImageView imageIv;
private EditText recognizedTextEt;
private static final String TAG = "MAIN_TAG";
private Uri imageUri = null;
//to handle the result of Camere/Gallery permissions
private static final int CAMERA_REQUEST_CODE = 100;
private static final int STORAGE_REQUEST_CODE = 101;
//arrays of permission required to pick image from Camera,gallery
private String[] cameraPermissions;
private String[] storagePermissions;
private ProgressDialog progressDialog;
private TextRecognizer textRecognizer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
inputImageBtn = findViewById(R.id.inputImageBtn);
recognizeTextBtn = findViewById(R.id.recognizeBtn);
imageIv = findViewById(R.id.imageIv);
recognizedTextEt = findViewById(R.id.recognizedTextEd);
cameraPermissions = new String[] {Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE};
storagePermissions = new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE};
progressDialog = new ProgressDialog(this);
progressDialog.setTitle("Please Wait");
progressDialog.setCanceledOnTouchOutside(false);
textRecognizer = TextRecognition.getClient(TextRecognizerOptions.DEFAULT_OPTIONS);
inputImageBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showInputImageDialog();
}
});
recognizeTextBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(imageUri == null){
Toast.makeText(MainActivity.this,"Pick image first...",Toast.LENGTH_SHORT).show();
}
else {
recognizeTextFromImage();
}
}
});
}
private void recognizeTextFromImage() {
Log.d(TAG, "recognizeTextFromImage: ");
progressDialog.setMessage("Preparing image...");
progressDialog.show();
try {
InputImage inputImage = InputImage.fromFilePath(this,imageUri);
progressDialog.setMessage("Recognizing text...");
Task<Text> textTaskResult = textRecognizer.process(inputImage).addOnSuccessListener(new OnSuccessListener<Text>() {
@Override
public void onSuccess(Text text) {
progressDialog.dismiss();
String recognizedText = text.getText();
Log.d(TAG, "onSuccess: recognizedText: "+recognizedText);
recognizedTextEt.setText(recognizedText);
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
progressDialog.dismiss();
Log.e(TAG, "onFailure: ",e);
Toast.makeText(MainActivity.this,"Failed recognizing text due to"+e.getMessage(),Toast.LENGTH_SHORT).show();
}
});
} catch (Exception e) {
progressDialog.dismiss();
Log.e(TAG, "recognizeTextFromImage: ",e);
Toast.makeText(MainActivity.this,"Failed preparing image due to"+e.getMessage(),Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
private void showInputImageDialog() {
PopupMenu popupMenu = new PopupMenu(this, inputImageBtn);
popupMenu.getMenu().add(Menu.NONE,1,1,"CAMERA");
popupMenu.getMenu().add(Menu.NONE,2,2,"GALLERY");
popupMenu.show();
popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
int id = item.getItemId();
if(id == 1){
Log.d(TAG, "onMenuItemClick: Camera Clicked...");
if(checkCameraPermissions()){
pickImageCamera();
}
else{
requestCameraPermissions();
}
}
else if(id == 2){
Log.d(TAG, "onMenuItemClick: Gallery Clicked...");
if(checkStoragePermision()){
pickImageGallery();
}
else{
requestStoragePermission();
}
}
return false;
}
});
}
private void pickImageGallery(){
Log.d(TAG, "pickImageGallery: ");
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");
galleryActivityResultLauncher.launch(intent);
}
private ActivityResultLauncher<Intent> galleryActivityResultLauncher = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
new ActivityResultCallback<ActivityResult>() {
@Override
public void onActivityResult(ActivityResult result) {
if(result.getResultCode() == Activity.RESULT_OK){
//image picked
Intent data = result.getData();
imageUri = data.getData();
Log.d(TAG, "onActivityResult: imageUri "+imageUri);
//set to imageview
imageIv.setImageURI(imageUri);
}
else{
Log.d(TAG, "onActivityResult: cancelled");
Toast.makeText(MainActivity.this,"Cancelled...",Toast.LENGTH_SHORT).show();
}
}
}
);
private void pickImageCamera(){
Log.d(TAG, "pickImageCamera: ");
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, "Sample Title");
values.put(MediaStore.Images.Media.DESCRIPTION, "Sample Description");
imageUri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,values);
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
cameraActivityResultLauncher.launch(intent);
}
private ActivityResultLauncher<Intent> cameraActivityResultLauncher = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
new ActivityResultCallback<ActivityResult>() {
@Override
public void onActivityResult(ActivityResult result) {
if(result.getResultCode() == Activity.RESULT_OK){
Log.d(TAG, "onActivityResult: imageUri "+imageUri);
imageIv.setImageURI(imageUri);
}
else{
Log.d(TAG, "onActivityResult: cancelled");
Toast.makeText(MainActivity.this,"Cancelled", Toast.LENGTH_SHORT).show();
}
}
}
);
private boolean checkStoragePermision(){
boolean result = ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == (PackageManager.PERMISSION_GRANTED);
return result;
}
private void requestStoragePermission(){
ActivityCompat.requestPermissions(this,storagePermissions,STORAGE_REQUEST_CODE);
}
private boolean checkCameraPermissions(){
boolean cameraResult = ContextCompat.checkSelfPermission(this,Manifest.permission.CAMERA) == (PackageManager.PERMISSION_GRANTED);
boolean storafeResult = ContextCompat.checkSelfPermission(this,Manifest.permission.WRITE_EXTERNAL_STORAGE) == (PackageManager.PERMISSION_GRANTED);
return cameraResult && storafeResult;
}
private void requestCameraPermissions(){
ActivityCompat.requestPermissions(this,cameraPermissions, CAMERA_REQUEST_CODE);
}
//handle permission results
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode){
case CAMERA_REQUEST_CODE:{
if (grantResults.length>0){
boolean cameraAccepted = grantResults[0] == PackageManager.PERMISSION_GRANTED;
boolean storageAccepted = grantResults[1] == PackageManager.PERMISSION_GRANTED;
if(cameraAccepted && storageAccepted){
pickImageCamera();
}
else {
Toast.makeText(this, "Camera && Storage permissions are required", Toast.LENGTH_SHORT).show();
}
}
else{
Toast.makeText(this,"Cancelled",Toast.LENGTH_SHORT).show();
}
}
break;
case STORAGE_REQUEST_CODE:{
if(grantResults.length>0){
boolean storageAccepted = grantResults[0] == PackageManager.PERMISSION_GRANTED;
if (storageAccepted) {
pickImageGallery();
}
else {
Toast.makeText(this, "Storage permission is required", Toast.LENGTH_SHORT).show();
}
}
}
break;
}
}
}
Also i implemented these two
implementation 'com.google.android.gms:play-services-mlkit-text-recognition:18.0.2'
implementation 'com.google.android.gms:play-services-mlkit-text-recognition-common:18.0.0'
And give the permissions to manifest:
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
And this is the error i got:
I searched the google and cnat find a solution. If u can help me i will be very happy.
I searched google and can’t find anything works.
2
Answers
I solved by implementing
com.google.mlkit:text-recognition:16.0.0-beta6Are you testing on device without play store services? For example on an emulator? In order to use com.google.android.gms:play-services-mlkit-text-recognition:18.0.2 it has to be on a device with play store services.