NullPointerException after Image Capture

[Syed-Affan-Hameed]

Below is the Error: " java.lang.RuntimeException: Unable to start activity ComponentInfo{com.labters.documentscannerandroid/com.labters.documentscannerandroid.ImageCropActivity}: java.lang.NullPointerException: contentResolver!!.openIn…odeStream(this) } must not be null ". The application works fine when I select the image from the gallery. But when I use camera to capture, the above error comes up in the console. is this a known issue?, can anyone help me resolve this? Thanks

[KamranKhanDemo]

All I can guess , it is image path error, you need to double check it is not happening to me either.

[KamranKhanDemo]

The follwoing code I have written in Java for ImageCropActivity, you can use that if you are using Java, or better to use Already written Kotlin Code `import androidx.appcompat.app.AppCompatActivity;

import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.ProgressBar;

import com.your_project.R;

import com.labters.documentscanner.DocumentScannerView;

import kotlin.Unit;

public class ImageCropActivity extends AppCompatActivity {

private static final String FILE_DIR = "FileDir";
DocumentScannerView documentScannerView;

ImageView resultImage;
ProgressBar progressBar;
Button btnImageCrop;

private static ImageCroppedCallBack callback;

public static Intent newIntent(Context context, String selectedFilePath, ImageCroppedCallBack imageCroppedCallBack) {
    Intent intent = new Intent(context, ImageCropActivity.class);
    intent.putExtra(FILE_DIR, selectedFilePath);
    //intent.putExtra("callback",callback);
    callback = imageCroppedCallBack;

    return intent;
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_image_crop);
    documentScannerView = findViewById(R.id.document_scanner);
    btnImageCrop = findViewById(R.id.btnImageCrop);
    progressBar = findViewById(R.id.progressBar);
    resultImage = findViewById(R.id.result_image);

    String filePath = getIntent().getStringExtra(FILE_DIR);
    Bitmap bitmap = assetToBitmap(filePath);

    //ImageProcessingUtils.processImage(filePath, filePath);

    LoadListenerFunction onLoadListener = new LoadListenerFunction() {
        @Override
        public Unit invoke(Boolean loading) {
            // Your implementation here
            if (loading) {
                // Handle loading state
            } else {
                // Handle not loading state
            }
            progressBar.setVisibility(loading ? View.VISIBLE : View.GONE);
            return Unit.INSTANCE;
        }
    };

    documentScannerView.setOnLoadListener(onLoadListener);

    documentScannerView.setImage(bitmap);

    btnImageCrop.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            progressBar.setVisibility(View.VISIBLE);
            // Simulate coroutine behavior using a separate thread or AsyncTask
            new Thread(new Runnable() {
                @Override
                public void run() {
                    final Bitmap image = documentScannerView.getCroppedImage();
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            progressBar.setVisibility(View.GONE);
                            resultImage.setVisibility(View.VISIBLE);
                            resultImage.setImageBitmap(image);
                            callback.onImageCropped(image);
                            finish();
                        }
                    });
                }
            }).start();
        }
    });
}

private Bitmap assetToBitmap(String file) {
    try {

        return BitmapFactory.decodeFile(file);
       

    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

} `

[markusGF]

I have the same problem. Using java not kotlin. Implemented all like described but when use .setImage(bitmap) I got an NullPointerException. The bitmap is given and valid, android studio show me the image in the debugger. The following error was thrown:

FATAL EXCEPTION: main Process: de.app, PID: 29949 java.lang.NullPointerException at com.labters.documentscanner.DocumentScannerView.getLifecycle(DocumentScannerView.kt:46) at com.labters.documentscanner.DocumentScannerView.getScope(DocumentScannerView.kt:50) at com.labters.documentscanner.DocumentScannerView.doWhenInitialised(DocumentScannerView.kt:183) at com.labters.documentscanner.DocumentScannerView.setImage(DocumentScannerView.kt:76) at de.app.layout.CallbackFragments.ViewImageFragment.initViews(ViewImageFragment.java:153) at de.app.layout.CallbackFragments.ViewImageFragment.onCreateView(ViewImageFragment.java:97) at androidx.fragment.app.Fragment.performCreateView(Fragment.java:3114) at androidx.fragment.app.DialogFragment.performCreateView(DialogFragment.java:775) at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:557) at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:272) at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1943) at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1845) at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1782) at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:565) at android.os.Handler.handleCallback(Handler.java:942) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loopOnce(Looper.java:226) at android.os.Looper.loop(Looper.java:313) at android.app.ActivityThread.main(ActivityThread.java:8762) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:604) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067)