WIP

app/build.gradle.kts

@@ -94,6 +94,7 @@ dependencies {
     implementation("androidx.preference:preference:1.2.1")
     implementation("com.google.android.material:material:1.12.0")
     implementation("com.github.yalantis:ucrop:2.2.9")
+    implementation("androidx.work:work-runtime:2.9.0")
     coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.0.4")
 
     // Splash Screen

app/src/main/AndroidManifest.xml

@@ -12,6 +12,8 @@
     <uses-sdk tools:overrideLibrary="com.google.zxing.client.android" />
 
     <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" android:maxSdkVersion="23" />
 
     <uses-feature
@@ -188,5 +190,6 @@
                 <action android:name="android.service.controls.ControlsProviderService" />
             </intent-filter>
         </service>
+        <service android:name=".importexport.ImportExportWorker"/>
     </application>
 </manifest>

app/src/main/java/protect/card_locker/ImportExportActivity.java

@@ -1,8 +1,9 @@
 package protect.card_locker;
 
 import android.content.ActivityNotFoundException;
-import android.content.DialogInterface;
+import android.content.Context;
 import android.content.Intent;
+import android.content.pm.PackageManager;
 import android.net.Uri;
 import android.os.Bundle;
 import android.text.InputType;
@@ -17,31 +18,31 @@ import android.widget.Toast;
 
 import androidx.activity.result.ActivityResultLauncher;
 import androidx.activity.result.contract.ActivityResultContracts;
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.widget.Toolbar;
+import androidx.work.Data;
+import androidx.work.ExistingWorkPolicy;
+import androidx.work.OneTimeWorkRequest;
+import androidx.work.OutOfQuotaPolicy;
+import androidx.work.WorkManager;
 
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.textfield.TextInputLayout;
 
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
-import protect.card_locker.async.TaskHandler;
 import protect.card_locker.databinding.ImportExportActivityBinding;
 import protect.card_locker.importexport.DataFormat;
-import protect.card_locker.importexport.ImportExportResult;
-import protect.card_locker.importexport.ImportExportResultType;
+import protect.card_locker.importexport.ImportExportWorker;
 
 public class ImportExportActivity extends CatimaAppCompatActivity {
     private ImportExportActivityBinding binding;
     private static final String TAG = "Catima";
 
-    private ImportExportTask importExporter;
-
     private String importAlertTitle;
     private String importAlertMessage;
     private DataFormat importDataFormat;
@@ -51,7 +52,10 @@ public class ImportExportActivity extends CatimaAppCompatActivity {
     private ActivityResultLauncher<String> fileOpenLauncher;
     private ActivityResultLauncher<Intent> filePickerLauncher;
 
-    final private TaskHandler mTasks = new TaskHandler();
+    private static final int PERMISSION_REQUEST_EXPORT = 100;
+    private static final int PERMISSION_REQUEST_IMPORT = 101;
+
+    private OneTimeWorkRequest mRequestedWorkRequest;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -80,15 +84,20 @@ public class ImportExportActivity extends CatimaAppCompatActivity {
                 Log.e(TAG, "Activity returned NULL uri");
                 return;
             }
-            try {
-                OutputStream writer = getContentResolver().openOutputStream(uri);
-                Log.e(TAG, "Starting file export with: " + result.toString());
-                startExport(writer, uri, exportPassword.toCharArray(), true);
-            } catch (IOException e) {
-                Log.e(TAG, "Failed to export file: " + result.toString(), e);
-                onExportComplete(new ImportExportResult(ImportExportResultType.GenericFailure, result.toString()), uri);
-            }
 
+            Data exportRequestData = new Data.Builder()
+                    .putString(ImportExportWorker.INPUT_URI, uri.toString())
+                    .putString(ImportExportWorker.INPUT_ACTION, ImportExportWorker.ACTION_EXPORT)
+                    .putString(ImportExportWorker.INPUT_FORMAT, DataFormat.Catima.name())
+                    .putString(ImportExportWorker.INPUT_PASSWORD, exportPassword)
+                    .build();
+
+            mRequestedWorkRequest = new OneTimeWorkRequest.Builder(ImportExportWorker.class)
+                    .setInputData(exportRequestData)
+                    .setExpedited(OutOfQuotaPolicy.RUN_AS_NON_EXPEDITED_WORK_REQUEST)
+                    .build();
+
+            PermissionUtils.requestPostNotificationsPermission(this, PERMISSION_REQUEST_EXPORT);
         });
         fileOpenLauncher = registerForActivityResult(new ActivityResultContracts.GetContent(), result -> {
             if (result == null) {
@@ -159,15 +168,24 @@ public class ImportExportActivity extends CatimaAppCompatActivity {
         importApplication.setOnClickListener(v -> chooseImportType(true, null));
     }
 
+    public static OneTimeWorkRequest buildImportRequest(DataFormat dataFormat, Uri uri, char[] password) {
+        Data importRequestData = new Data.Builder()
+                .putString(ImportExportWorker.INPUT_URI, uri.toString())
+                .putString(ImportExportWorker.INPUT_ACTION, ImportExportWorker.ACTION_IMPORT)
+                .putString(ImportExportWorker.INPUT_FORMAT, dataFormat.name())
+                .putString(ImportExportWorker.INPUT_PASSWORD, Arrays.toString(password))
+                .build();
+
+        return new OneTimeWorkRequest.Builder(ImportExportWorker.class)
+                .setInputData(importRequestData)
+                .setExpedited(OutOfQuotaPolicy.RUN_AS_NON_EXPEDITED_WORK_REQUEST)
+                .build();
+    }
+
     private void openFileForImport(Uri uri, char[] password) {
-        try {
-            InputStream reader = getContentResolver().openInputStream(uri);
-            Log.e(TAG, "Starting file import with: " + uri.toString());
-            startImport(reader, uri, importDataFormat, password, true);
-        } catch (IOException e) {
-            Log.e(TAG, "Failed to import file: " + uri.toString(), e);
-            onImportComplete(new ImportExportResult(ImportExportResultType.GenericFailure, e.toString()), uri, importDataFormat);
-        }
+        mRequestedWorkRequest = buildImportRequest(importDataFormat, uri, password);
+
+        PermissionUtils.requestPostNotificationsPermission(this, PERMISSION_REQUEST_IMPORT);
     }
 
     private void chooseImportType(boolean choosePicker,
@@ -232,20 +250,17 @@ public class ImportExportActivity extends CatimaAppCompatActivity {
                     new MaterialAlertDialogBuilder(this)
                             .setTitle(importAlertTitle)
                             .setMessage(importAlertMessage)
-                            .setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
-                                @Override
-                                public void onClick(DialogInterface dialog, int which) {
-                                    try {
-                                        if (choosePicker) {
-                                            final Intent intentPickAction = new Intent(Intent.ACTION_PICK);
-                                            filePickerLauncher.launch(intentPickAction);
-                                        } else {
-                                            fileOpenLauncher.launch("*/*");
-                                        }
-                                    } catch (ActivityNotFoundException e) {
-                                        Toast.makeText(getApplicationContext(), R.string.failedOpeningFileManager, Toast.LENGTH_LONG).show();
-                                        Log.e(TAG, "No activity found to handle intent", e);
+                            .setPositiveButton(R.string.ok, (dialog1, which1) -> {
+                                try {
+                                    if (choosePicker) {
+                                        final Intent intentPickAction = new Intent(Intent.ACTION_PICK);
+                                        filePickerLauncher.launch(intentPickAction);
+                                    } else {
+                                        fileOpenLauncher.launch("*/*");
                                     }
+                                } catch (ActivityNotFoundException e) {
+                                    Toast.makeText(getApplicationContext(), R.string.failedOpeningFileManager, Toast.LENGTH_LONG).show();
+                                    Log.e(TAG, "No activity found to handle intent", e);
                                 }
                             })
                             .setNegativeButton(R.string.cancel, null)
@@ -254,60 +269,12 @@ public class ImportExportActivity extends CatimaAppCompatActivity {
         builder.show();
     }
 
-    private void startImport(final InputStream target, final Uri targetUri, final DataFormat dataFormat, final char[] password, final boolean closeWhenDone) {
-        mTasks.flushTaskList(TaskHandler.TYPE.IMPORT, true, false, false);
-        ImportExportTask.TaskCompleteListener listener = new ImportExportTask.TaskCompleteListener() {
-            @Override
-            public void onTaskComplete(ImportExportResult result, DataFormat dataFormat) {
-                onImportComplete(result, targetUri, dataFormat);
-                if (closeWhenDone) {
-                    try {
-                        target.close();
-                    } catch (IOException ioException) {
-                        ioException.printStackTrace();
-                    }
-                }
-            }
-        };
-
-        importExporter = new ImportExportTask(ImportExportActivity.this,
-                dataFormat, target, password, listener);
-        mTasks.executeTask(TaskHandler.TYPE.IMPORT, importExporter);
-    }
-
-    private void startExport(final OutputStream target, final Uri targetUri, char[] password, final boolean closeWhenDone) {
-        mTasks.flushTaskList(TaskHandler.TYPE.EXPORT, true, false, false);
-        ImportExportTask.TaskCompleteListener listener = new ImportExportTask.TaskCompleteListener() {
-            @Override
-            public void onTaskComplete(ImportExportResult result, DataFormat dataFormat) {
-                onExportComplete(result, targetUri);
-                if (closeWhenDone) {
-                    try {
-                        target.close();
-                    } catch (IOException ioException) {
-                        ioException.printStackTrace();
-                    }
-                }
-            }
-        };
-
-        importExporter = new ImportExportTask(ImportExportActivity.this,
-                DataFormat.Catima, target, password, listener);
-        mTasks.executeTask(TaskHandler.TYPE.EXPORT, importExporter);
-    }
-
-    @Override
-    protected void onDestroy() {
-        mTasks.flushTaskList(TaskHandler.TYPE.IMPORT, true, false, false);
-        mTasks.flushTaskList(TaskHandler.TYPE.EXPORT, true, false, false);
-        super.onDestroy();
-    }
-
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         int id = item.getItemId();
 
         if (id == android.R.id.home) {
+            setResult(RESULT_CANCELED);
             finish();
             return true;
         }
@@ -315,19 +282,19 @@ public class ImportExportActivity extends CatimaAppCompatActivity {
         return super.onOptionsItemSelected(item);
     }
 
-    private void retryWithPassword(DataFormat dataFormat, Uri uri) {
-        AlertDialog.Builder builder = new MaterialAlertDialogBuilder(this);
+    public static void retryWithPassword(Context context, DataFormat dataFormat, Uri uri) {
+        AlertDialog.Builder builder = new MaterialAlertDialogBuilder(context);
         builder.setTitle(R.string.passwordRequired);
 
-        FrameLayout container = new FrameLayout(ImportExportActivity.this);
+        FrameLayout container = new FrameLayout(context);
 
-        final TextInputLayout textInputLayout = new TextInputLayout(ImportExportActivity.this);
+        final TextInputLayout textInputLayout = new TextInputLayout(context);
         textInputLayout.setEndIconMode(TextInputLayout.END_ICON_PASSWORD_TOGGLE);
         LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
         params.setMargins(50, 10, 50, 0);
         textInputLayout.setLayoutParams(params);
 
-        final EditText input = new EditText(ImportExportActivity.this);
+        final EditText input = new EditText(context);
         input.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
         input.setHint(R.string.exportPasswordHint);
 
@@ -336,75 +303,55 @@ public class ImportExportActivity extends CatimaAppCompatActivity {
         builder.setView(container);
 
         builder.setPositiveButton(R.string.ok, (dialogInterface, i) -> {
-            openFileForImport(uri, input.getText().toString().toCharArray());
+            OneTimeWorkRequest importRequest = ImportExportActivity.buildImportRequest(dataFormat, uri, input.getText().toString().toCharArray());
+            WorkManager.getInstance(context).enqueueUniqueWork(ImportExportWorker.ACTION_IMPORT, ExistingWorkPolicy.REPLACE, importRequest);
         });
         builder.setNegativeButton(R.string.cancel, (dialogInterface, i) -> dialogInterface.cancel());
 
         builder.show();
     }
 
-    private String buildResultDialogMessage(ImportExportResult result, boolean isImport) {
-        int messageId;
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
 
-        if (result.resultType() == ImportExportResultType.Success) {
-            messageId = isImport ? R.string.importSuccessful : R.string.exportSuccessful;
-        } else {
-            messageId = isImport ? R.string.importFailed : R.string.exportFailed;
-        }
-
-        StringBuilder messageBuilder = new StringBuilder(getResources().getString(messageId));
-        if (result.developerDetails() != null) {
-            messageBuilder.append("\n\n");
-            messageBuilder.append(getResources().getString(R.string.include_if_asking_support));
-            messageBuilder.append("\n\n");
-            messageBuilder.append(result.developerDetails());
-        }
-
-        return messageBuilder.toString();
+        onMockedRequestPermissionsResult(requestCode, permissions, grantResults);
     }
 
-    private void onImportComplete(ImportExportResult result, Uri path, DataFormat dataFormat) {
-        ImportExportResultType resultType = result.resultType();
+    public void onMockedRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        boolean granted = grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED;
+        Integer failureReason = null;
 
-        if (resultType == ImportExportResultType.BadPassword) {
-            retryWithPassword(dataFormat, path);
-            return;
+        if (requestCode == PERMISSION_REQUEST_EXPORT) {
+            if (granted) {
+                WorkManager.getInstance(this).enqueueUniqueWork(ImportExportWorker.ACTION_EXPORT, ExistingWorkPolicy.REPLACE, mRequestedWorkRequest);
+
+                Toast.makeText(this, R.string.exportStartedCheckNotifications, Toast.LENGTH_LONG).show();
+
+                // Import/export started
+                setResult(RESULT_OK);
+                finish();
+
+                return;
+            }
+
+            failureReason = R.string.postNotificationsPermissionRequired;
+        } else if (requestCode == PERMISSION_REQUEST_IMPORT) {
+            if (granted) {
+                WorkManager.getInstance(this).enqueueUniqueWork(ImportExportWorker.ACTION_IMPORT, ExistingWorkPolicy.REPLACE, mRequestedWorkRequest);
+
+                // Import/export started
+                setResult(RESULT_OK);
+                finish();
+
+                return;
+            }
+
+            failureReason = R.string.postNotificationsPermissionRequired;
         }
 
-        AlertDialog.Builder builder = new MaterialAlertDialogBuilder(this);
-        builder.setTitle(resultType == ImportExportResultType.Success ? R.string.importSuccessfulTitle : R.string.importFailedTitle);
-        builder.setMessage(buildResultDialogMessage(result, true));
-        builder.setNeutralButton(R.string.ok, (dialog, which) -> dialog.dismiss());
-
-        builder.create().show();
-    }
-
-    private void onExportComplete(ImportExportResult result, final Uri path) {
-        ImportExportResultType resultType = result.resultType();
-
-        AlertDialog.Builder builder = new MaterialAlertDialogBuilder(this);
-        builder.setTitle(resultType == ImportExportResultType.Success ? R.string.exportSuccessfulTitle : R.string.exportFailedTitle);
-        builder.setMessage(buildResultDialogMessage(result, false));
-        builder.setNeutralButton(R.string.ok, (dialog, which) -> dialog.dismiss());
-
-        if (resultType == ImportExportResultType.Success) {
-            final CharSequence sendLabel = ImportExportActivity.this.getResources().getText(R.string.sendLabel);
-
-            builder.setPositiveButton(sendLabel, (dialog, which) -> {
-                Intent sendIntent = new Intent(Intent.ACTION_SEND);
-                sendIntent.putExtra(Intent.EXTRA_STREAM, path);
-                sendIntent.setType("text/csv");
-
-                // set flag to give temporary permission to external app to use the FileProvider
-                sendIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
-
-                ImportExportActivity.this.startActivity(Intent.createChooser(sendIntent,
-                        sendLabel));
-
-                dialog.dismiss();
-            });
+        if (failureReason != null) {
+            Toast.makeText(this, failureReason, Toast.LENGTH_LONG).show();
         }
-
-        builder.create().show();
     }
 }

app/src/main/java/protect/card_locker/ImportExportTask.java

@@ -1,143 +0,0 @@
-package protect.card_locker;
-
-import android.app.Activity;
-import android.app.ProgressDialog;
-import android.content.Context;
-import android.content.DialogInterface;
-import android.database.sqlite.SQLiteDatabase;
-import android.util.Log;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.io.OutputStreamWriter;
-import java.nio.charset.StandardCharsets;
-
-import protect.card_locker.async.CompatCallable;
-import protect.card_locker.importexport.DataFormat;
-import protect.card_locker.importexport.ImportExportResult;
-import protect.card_locker.importexport.ImportExportResultType;
-import protect.card_locker.importexport.MultiFormatExporter;
-import protect.card_locker.importexport.MultiFormatImporter;
-
-public class ImportExportTask implements CompatCallable<ImportExportResult> {
-    private static final String TAG = "Catima";
-
-    private Activity activity;
-    private boolean doImport;
-    private DataFormat format;
-    private OutputStream outputStream;
-    private InputStream inputStream;
-    private char[] password;
-    private TaskCompleteListener listener;
-
-    private ProgressDialog progress;
-
-    /**
-     * Constructor which will setup a task for exporting to the given file
-     */
-    ImportExportTask(Activity activity, DataFormat format, OutputStream output, char[] password,
-                     TaskCompleteListener listener) {
-        super();
-        this.activity = activity;
-        this.doImport = false;
-        this.format = format;
-        this.outputStream = output;
-        this.password = password;
-        this.listener = listener;
-    }
-
-    /**
-     * Constructor which will setup a task for importing from the given InputStream.
-     */
-    ImportExportTask(Activity activity, DataFormat format, InputStream input, char[] password,
-                     TaskCompleteListener listener) {
-        super();
-        this.activity = activity;
-        this.doImport = true;
-        this.format = format;
-        this.inputStream = input;
-        this.password = password;
-        this.listener = listener;
-    }
-
-    private ImportExportResult performImport(Context context, InputStream stream, SQLiteDatabase database, char[] password) {
-        ImportExportResult importResult = MultiFormatImporter.importData(context, database, stream, format, password);
-
-        Log.i(TAG, "Import result: " + importResult);
-
-        return importResult;
-    }
-
-    private ImportExportResult performExport(Context context, OutputStream stream, SQLiteDatabase database, char[] password) {
-        ImportExportResult result;
-
-        try {
-            OutputStreamWriter writer = new OutputStreamWriter(stream, StandardCharsets.UTF_8);
-            result = MultiFormatExporter.exportData(context, database, stream, format, password);
-            writer.close();
-        } catch (IOException e) {
-            result = new ImportExportResult(ImportExportResultType.GenericFailure, e.toString());
-            Log.e(TAG, "Unable to export file", e);
-        }
-
-        Log.i(TAG, "Export result: " + result);
-
-        return result;
-    }
-
-    public void onPreExecute() {
-        progress = new ProgressDialog(activity);
-        progress.setTitle(doImport ? R.string.importing : R.string.exporting);
-
-        progress.setOnDismissListener(new DialogInterface.OnDismissListener() {
-            @Override
-            public void onDismiss(DialogInterface dialog) {
-                ImportExportTask.this.stop();
-            }
-        });
-
-        progress.show();
-    }
-
-    protected ImportExportResult doInBackground(Void... nothing) {
-        final SQLiteDatabase database = new DBHelper(activity).getWritableDatabase();
-        ImportExportResult result;
-
-        if (doImport) {
-            result = performImport(activity.getApplicationContext(), inputStream, database, password);
-        } else {
-            result = performExport(activity.getApplicationContext(), outputStream, database, password);
-        }
-
-        database.close();
-
-        return result;
-    }
-
-    public void onPostExecute(Object castResult) {
-        listener.onTaskComplete((ImportExportResult) castResult, format);
-
-        progress.dismiss();
-        Log.i(TAG, (doImport ? "Import" : "Export") + " Complete");
-    }
-
-    protected void onCancelled() {
-        progress.dismiss();
-        Log.i(TAG, (doImport ? "Import" : "Export") + " Cancelled");
-    }
-
-    protected void stop() {
-        // Whelp
-    }
-
-    @Override
-    public ImportExportResult call() {
-        return doInBackground();
-    }
-
-    interface TaskCompleteListener {
-        void onTaskComplete(ImportExportResult result, DataFormat format);
-    }
-
-}

app/src/main/java/protect/card_locker/MainActivity.java

@@ -26,9 +26,13 @@ import androidx.appcompat.view.ActionMode;
 import androidx.appcompat.widget.SearchView;
 import androidx.core.splashscreen.SplashScreen;
 import androidx.recyclerview.widget.RecyclerView;
+import androidx.work.Data;
+import androidx.work.WorkInfo;
+import androidx.work.WorkManager;
 
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
 import com.google.android.material.tabs.TabLayout;
 
 import java.io.UnsupportedEncodingException;
@@ -36,11 +40,15 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.ExecutionException;
 import java.util.concurrent.atomic.AtomicInteger;
 
 import protect.card_locker.databinding.ContentMainBinding;
 import protect.card_locker.databinding.MainActivityBinding;
 import protect.card_locker.databinding.SortingOptionBinding;
+import protect.card_locker.importexport.DataFormat;
+import protect.card_locker.importexport.ImportExportWorker;
 import protect.card_locker.preferences.SettingsActivity;
 
 public class MainActivity extends CatimaAppCompatActivity implements LoyaltyCardCursorAdapter.CardAdapterListener {
@@ -71,6 +79,7 @@ public class MainActivity extends CatimaAppCompatActivity implements LoyaltyCard
 
     private ActivityResultLauncher<Intent> mBarcodeScannerLauncher;
     private ActivityResultLauncher<Intent> mSettingsLauncher;
+    private ActivityResultLauncher<Intent> mImportExportLauncher;
 
     private ActionMode.Callback mCurrentActionModeCallback = new ActionMode.Callback() {
         @Override
@@ -304,6 +313,69 @@ public class MainActivity extends CatimaAppCompatActivity implements LoyaltyCard
             }
         });
 
+        mImportExportLauncher = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), result -> {
+            // User didn't ask for import or export
+            if (result.getResultCode() != RESULT_OK) {
+                return;
+            }
+
+            // Watch for active imports/exports
+            new Thread(() -> {
+                WorkManager workManager = WorkManager.getInstance(MainActivity.this);
+
+                Snackbar importRunning = Snackbar.make(binding.getRoot(), R.string.importing, Snackbar.LENGTH_INDEFINITE);
+
+                while (true) {
+                    try {
+                        List<WorkInfo> activeImports = workManager.getWorkInfosForUniqueWork(ImportExportWorker.ACTION_IMPORT).get();
+
+                        // We should only have one import running at a time, so it should be safe to always grab the latest
+                        WorkInfo activeImport = activeImports.get(activeImports.size() - 1);
+                        WorkInfo.State importState = activeImport.getState();
+
+                        if (importState == WorkInfo.State.RUNNING || importState == WorkInfo.State.ENQUEUED || importState == WorkInfo.State.BLOCKED) {
+                            importRunning.show();
+                        } else if (importState == WorkInfo.State.SUCCEEDED) {
+                            importRunning.dismiss();
+                            runOnUiThread(() -> {
+                                Toast.makeText(getApplicationContext(), getString(R.string.importSuccessful), Toast.LENGTH_LONG).show();
+                                updateLoyaltyCardList(true);
+                            });
+
+                            break;
+                        } else {
+                            importRunning.dismiss();
+
+                            Data outputData = activeImport.getOutputData();
+
+                            // FIXME: This dialog will asynchronously be accepted or declined and we don't know the status of it so we can't show the import state
+                            // We want to get back into this function
+                            // A cheap fix would be to keep looping but if the user dismissed the dialog that could mean we're looping forever...
+                            if (Objects.equals(outputData.getString(ImportExportWorker.OUTPUT_ERROR_REASON), ImportExportWorker.ERROR_PASSWORD_REQUIRED)) {
+                                runOnUiThread(() -> ImportExportActivity.retryWithPassword(
+                                        MainActivity.this,
+                                        DataFormat.valueOf(outputData.getString(ImportExportWorker.INPUT_FORMAT)),
+                                        Uri.parse(outputData.getString(ImportExportWorker.INPUT_URI))
+                                ));
+                            } else {
+                                runOnUiThread(() -> {
+                                    Toast.makeText(getApplicationContext(), getString(R.string.importFailed), Toast.LENGTH_LONG).show();
+                                    Toast.makeText(getApplicationContext(), activeImport.getOutputData().getString(ImportExportWorker.OUTPUT_ERROR_REASON), Toast.LENGTH_LONG).show();
+                                    Toast.makeText(getApplicationContext(), activeImport.getOutputData().getString(ImportExportWorker.OUTPUT_ERROR_DETAILS), Toast.LENGTH_LONG).show();
+                                });
+                            }
+
+                            break;
+                        }
+                    } catch (ExecutionException e) {
+                        throw new RuntimeException(e);
+                    } catch (InterruptedException e) {
+                        throw new RuntimeException(e);
+                    }
+                }
+            }).start();
+        });
+
         getOnBackPressedDispatcher().addCallback(this, new OnBackPressedCallback(true) {
             @Override
             public void handleOnBackPressed() {
@@ -641,7 +713,7 @@ public class MainActivity extends CatimaAppCompatActivity implements LoyaltyCard
 
         if (id == R.id.action_import_export) {
             Intent i = new Intent(getApplicationContext(), ImportExportActivity.class);
-            startActivity(i);
+            mImportExportLauncher.launch(i);
             return true;
         }
 

app/src/main/java/protect/card_locker/NotificationHelper.java

@@ -0,0 +1,63 @@
+package protect.card_locker;
+
+import static android.content.Context.NOTIFICATION_SERVICE;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+public class NotificationHelper {
+
+    // Do not change these IDs!
+    public static final String CHANNEL_IMPORT = "import";
+
+    public static final String CHANNEL_EXPORT = "export";
+
+    public static final int IMPORT_ID = 100;
+    public static final int IMPORT_PROGRESS_ID = 101;
+    public static final int EXPORT_ID = 103;
+    public static final int EXPORT_PROGRESS_ID = 104;
+
+
+    public static Notification.Builder createNotificationBuilder(@NonNull Context context, @NonNull String channel, @NonNull int icon, @NonNull String title, @Nullable String message) {
+        Notification.Builder notificationBuilder = new Notification.Builder(context)
+                .setSmallIcon(icon)
+                .setTicker(title)
+                .setContentTitle(title);
+
+        if (message != null) {
+            notificationBuilder.setContentText(message);
+        }
+
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+            NotificationManager notificationManager = (NotificationManager) context.getSystemService(NOTIFICATION_SERVICE);
+            NotificationChannel notificationChannel = new NotificationChannel(channel, getChannelName(channel), NotificationManager.IMPORTANCE_DEFAULT);
+            notificationManager.createNotificationChannel(notificationChannel);
+
+            notificationBuilder.setChannelId(channel);
+        }
+
+        return notificationBuilder;
+    }
+
+    public static void sendNotification(@NonNull Context context, @NonNull int notificationId, @NonNull Notification notification) {
+        NotificationManager notificationManager = (NotificationManager) context.getSystemService(NOTIFICATION_SERVICE);
+
+        notificationManager.notify(notificationId, notification);
+    }
+
+    private static String getChannelName(@NonNull String channel) {
+        switch(channel) {
+            case CHANNEL_IMPORT:
+                return "Import";
+            case CHANNEL_EXPORT:
+                return "Export";
+            default:
+                throw new IllegalArgumentException("Unknown notification channel");
+        }
+    }
+}

app/src/main/java/protect/card_locker/PermissionUtils.java

@@ -42,6 +42,16 @@ public class PermissionUtils {
         return ContextCompat.checkSelfPermission(activity, android.Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED;
     }
 
+    /**
+     * Check if post notifications permission is needed
+     *
+     * @param activity
+     * @return
+     */
+    public static boolean needsPostNotificationsPermission(Activity activity) {
+        return ContextCompat.checkSelfPermission(activity, Manifest.permission.POST_NOTIFICATIONS) != PackageManager.PERMISSION_GRANTED;
+    }
+
     /**
      * Call onRequestPermissionsResult after storage read permission was granted.
      * Mocks a successful grant if a grant is not necessary.
@@ -91,4 +101,37 @@ public class PermissionUtils {
             activity.onMockedRequestPermissionsResult(requestCode, permissions, mockedResults);
         }
     }
+
+
+    /**
+     * Call onRequestPermissionsResult after notification permission was granted.
+     * Mocks a successful grant if a grant is not necessary.
+     *
+     * @param activity
+     * @param requestCode
+     */
+    public static void requestPostNotificationsPermission(CatimaAppCompatActivity activity, int requestCode) {
+        int[] mockedResults = new int[]{ PackageManager.PERMISSION_GRANTED };
+
+        if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.TIRAMISU) {
+            String[] permissions = new String[0];
+            activity.onMockedRequestPermissionsResult(requestCode, permissions, mockedResults);
+            return;
+        }
+
+        String[] permissions = new String[]{ Manifest.permission.POST_NOTIFICATIONS};
+
+        if (needsPostNotificationsPermission(activity)) {
+            ActivityCompat.requestPermissions(activity, permissions, requestCode);
+        } else {
+            // FIXME: This points to onMockedRequestPermissionResult instead of to
+            // onRequestPermissionResult because onRequestPermissionResult was only introduced in
+            // Android 6.0 (SDK 23) and we and to support Android 5.0 (SDK 21) too.
+            //
+            // When minSdk becomes 23, this should point to onRequestPermissionResult directly and
+            // the activity input variable should be changed from CatimaAppCompatActivity to
+            // Activity.
+            activity.onMockedRequestPermissionsResult(requestCode, permissions, mockedResults);
+        }
+    }
 }

app/src/main/java/protect/card_locker/importexport/ImportExportWorker.java

@@ -0,0 +1,212 @@
+package protect.card_locker.importexport;
+
+import android.app.Notification;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.net.Uri;
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+import androidx.work.Data;
+import androidx.work.ForegroundInfo;
+import androidx.work.WorkManager;
+import androidx.work.Worker;
+import androidx.work.WorkerParameters;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.nio.charset.StandardCharsets;
+
+import protect.card_locker.DBHelper;
+import protect.card_locker.NotificationHelper;
+import protect.card_locker.R;
+
+public class ImportExportWorker extends Worker {
+    private final String TAG = "Catima";
+
+    public static final String INPUT_URI = "uri";
+    public static final String INPUT_ACTION = "action";
+    public static final String INPUT_FORMAT = "format";
+    public static final String INPUT_PASSWORD = "password";
+
+    public static final String ACTION_IMPORT = "import";
+    public static final String ACTION_EXPORT = "export";
+
+    public static final String OUTPUT_ERROR_REASON = "errorReason";
+    public static final String ERROR_GENERIC = "errorTypeGeneric";
+    public static final String ERROR_PASSWORD_REQUIRED = "errorTypePasswordRequired";
+    public static final String OUTPUT_ERROR_DETAILS = "errorDetails";
+
+    public ImportExportWorker(@NonNull Context context, @NonNull WorkerParameters workerParams) {
+        super(context, workerParams);
+    }
+
+    @NonNull
+    @Override
+    public Result doWork() {
+        Log.e("CATIMA", "Started import/export worker");
+
+        Context context = getApplicationContext();
+
+        Data inputData = getInputData();
+
+        String uriString = inputData.getString(INPUT_URI);
+        String action = inputData.getString(INPUT_ACTION);
+        String format = inputData.getString(INPUT_FORMAT);
+        String password = inputData.getString(INPUT_PASSWORD);
+
+        if (action.equals(ACTION_IMPORT)) {
+            Log.e("CATIMA", "Import requested");
+
+            setForegroundAsync(createForegroundInfo(NotificationHelper.CHANNEL_IMPORT, NotificationHelper.IMPORT_PROGRESS_ID, R.string.importing));
+
+            ImportExportResult result;
+
+            InputStream stream;
+            try {
+                stream = context.getContentResolver().openInputStream(Uri.parse(uriString));
+            } catch (FileNotFoundException e) {
+                throw new RuntimeException(e);
+            }
+
+            final SQLiteDatabase database = new DBHelper(context).getWritableDatabase();
+
+            try {
+                InputStreamReader writer = new InputStreamReader(stream, StandardCharsets.UTF_8);
+                result = MultiFormatImporter.importData(context, database, stream, DataFormat.valueOf(format), password.toCharArray());
+                writer.close();
+            } catch (IOException e) {
+                Log.e(TAG, "Unable to import file", e);
+                NotificationHelper.sendNotification(context, NotificationHelper.IMPORT_ID, NotificationHelper.createNotificationBuilder(context, NotificationHelper.CHANNEL_IMPORT, R.drawable.ic_import_export_white_24dp, context.getString(R.string.importFailedTitle), e.getLocalizedMessage()).build());
+
+                Data failureData = new Data.Builder()
+                        .putString(OUTPUT_ERROR_REASON, ERROR_GENERIC)
+                        .putString(OUTPUT_ERROR_DETAILS, e.getLocalizedMessage())
+                        .putString(INPUT_URI, uriString)
+                        .putString(INPUT_ACTION, action)
+                        .putString(INPUT_FORMAT, format)
+                        .putString(INPUT_PASSWORD, password)
+                        .build();
+
+                return Result.failure(failureData);
+            }
+
+            Log.i(TAG, "Import result: " + result);
+
+            if (result.resultType() == ImportExportResultType.Success) {
+                NotificationHelper.sendNotification(context, NotificationHelper.IMPORT_ID, NotificationHelper.createNotificationBuilder(context, NotificationHelper.CHANNEL_IMPORT, R.drawable.ic_import_export_white_24dp, context.getString(R.string.importSuccessfulTitle), context.getString(R.string.importSuccessful)).build());
+
+                return Result.success();
+            } else if (result.resultType() == ImportExportResultType.BadPassword) {
+                Log.e(TAG, "Needs password, unhandled for now");
+                NotificationHelper.sendNotification(context, NotificationHelper.IMPORT_ID, NotificationHelper.createNotificationBuilder(context, NotificationHelper.CHANNEL_IMPORT, R.drawable.ic_import_export_white_24dp, context.getString(R.string.importing), context.getString(R.string.passwordRequired)).build());
+
+                Data failureData = new Data.Builder()
+                        .putString(OUTPUT_ERROR_REASON, ERROR_PASSWORD_REQUIRED)
+                        .putString(OUTPUT_ERROR_DETAILS, result.developerDetails())
+                        .putString(INPUT_URI, uriString)
+                        .putString(INPUT_ACTION, action)
+                        .putString(INPUT_FORMAT, format)
+                        .putString(INPUT_PASSWORD, password)
+                        .build();
+
+                return Result.failure(failureData);
+            } else {
+                NotificationHelper.sendNotification(context, NotificationHelper.IMPORT_ID, NotificationHelper.createNotificationBuilder(context, NotificationHelper.CHANNEL_IMPORT, R.drawable.ic_import_export_white_24dp, context.getString(R.string.importFailedTitle), context.getString(R.string.importFailed)).build());
+
+                Data failureData = new Data.Builder()
+                        .putString(OUTPUT_ERROR_REASON, ERROR_GENERIC)
+                        .putString(OUTPUT_ERROR_DETAILS, result.developerDetails())
+                        .putString(INPUT_URI, uriString)
+                        .putString(INPUT_ACTION, action)
+                        .putString(INPUT_FORMAT, format)
+                        .putString(INPUT_PASSWORD, password)
+                        .build();
+
+                return Result.failure(failureData);
+            }
+        } else {
+            Log.e("CATIMA", "Export requested");
+
+            setForegroundAsync(createForegroundInfo(NotificationHelper.CHANNEL_EXPORT, NotificationHelper.EXPORT_PROGRESS_ID, R.string.exporting));
+
+            ImportExportResult result;
+
+            OutputStream stream;
+            try {
+                stream = context.getContentResolver().openOutputStream(Uri.parse(uriString));
+            } catch (FileNotFoundException e) {
+                throw new RuntimeException(e);
+            }
+
+            final SQLiteDatabase database = new DBHelper(context).getReadableDatabase();
+
+            try {
+                OutputStreamWriter writer = new OutputStreamWriter(stream, StandardCharsets.UTF_8);
+                result = MultiFormatExporter.exportData(context, database, stream, DataFormat.valueOf(format), password.toCharArray());
+                writer.close();
+            } catch (IOException e) {
+                Log.e(TAG, "Unable to export file", e);
+                NotificationHelper.sendNotification(context, NotificationHelper.EXPORT_ID, NotificationHelper.createNotificationBuilder(context, NotificationHelper.CHANNEL_EXPORT, R.drawable.ic_import_export_white_24dp, context.getString(R.string.exportFailedTitle), e.getLocalizedMessage()).build());
+
+                Data failureData = new Data.Builder()
+                        .putString(OUTPUT_ERROR_REASON, ERROR_GENERIC)
+                        .putString(OUTPUT_ERROR_DETAILS, e.getLocalizedMessage())
+                        .putString(INPUT_URI, uriString)
+                        .putString(INPUT_ACTION, action)
+                        .putString(INPUT_FORMAT, format)
+                        .putString(INPUT_PASSWORD, password)
+                        .build();
+
+                return Result.failure(failureData);
+            }
+
+            Log.i(TAG, "Export result: " + result);
+
+            if (result.resultType() == ImportExportResultType.Success) {
+                NotificationHelper.sendNotification(context, NotificationHelper.EXPORT_ID, NotificationHelper.createNotificationBuilder(context, NotificationHelper.CHANNEL_EXPORT, R.drawable.ic_import_export_white_24dp, context.getString(R.string.exportSuccessfulTitle), context.getString(R.string.exportSuccessful)).build());
+
+                return Result.success();
+            } else {
+                NotificationHelper.sendNotification(context, NotificationHelper.EXPORT_ID, NotificationHelper.createNotificationBuilder(context, NotificationHelper.CHANNEL_EXPORT, R.drawable.ic_import_export_white_24dp, context.getString(R.string.exportFailedTitle), context.getString(R.string.exportFailed)).build());
+
+                Data failureData = new Data.Builder()
+                        .putString(OUTPUT_ERROR_REASON, ERROR_GENERIC)
+                        .putString(OUTPUT_ERROR_DETAILS, result.developerDetails())
+                        .putString(INPUT_URI, uriString)
+                        .putString(INPUT_ACTION, action)
+                        .putString(INPUT_FORMAT, format)
+                        .putString(INPUT_PASSWORD, password)
+                        .build();
+
+                return Result.failure(failureData);
+            }
+        }
+    }
+
+    @NonNull
+    private ForegroundInfo createForegroundInfo(@NonNull String channel, int notificationId, int title) {
+        Context context = getApplicationContext();
+
+        String cancel = context.getString(R.string.cancel);
+        // This PendingIntent can be used to cancel the worker
+        PendingIntent intent = WorkManager.getInstance(context)
+                .createCancelPendingIntent(getId());
+
+        Notification.Builder notificationBuilder = NotificationHelper.createNotificationBuilder(context, channel, R.drawable.ic_import_export_white_24dp, context.getString(title), null);
+
+        Notification notification = notificationBuilder
+                .setOngoing(true)
+                // Add the cancel action to the notification which can
+                // be used to cancel the worker
+                .addAction(android.R.drawable.ic_delete, cancel, intent)
+                .build();
+
+        return new ForegroundInfo(notificationId, notification);
+    }
+}

app/src/main/java/protect/card_locker/importexport/MultiFormatImporter.java

@@ -45,7 +45,7 @@ public class MultiFormatImporter {
                 break;
         }
 
-        String error = null;
+        String error;
         if (importer != null) {
             File inputFile;
             try {

app/src/main/res/values/strings.xml

@@ -346,4 +346,7 @@
     <string name="failedLaunchingFileManager">Could not find a supported file manager</string>
     <string name="multipleBarcodesFoundPleaseChooseOne">Which of the found barcodes do you want to use?</string>
     <string name="pageWithNumber">Page <xliff:g>%d</xliff:g></string>
+    <string name="exportStartedCheckNotifications">Export started, check your notifications for the result</string>
+    <string name="importStartedCheckNotifications">Import started, check your notifications for the result</string>
+    <string name="postNotificationsPermissionRequired">Permission to show notifications needed for this action…</string>
 </resources>

app/src/test/java/protect/card_locker/ImportExportTest.java

@@ -574,72 +574,6 @@ public class ImportExportTest {
         }
     }
 
-    class TestTaskCompleteListener implements ImportExportTask.TaskCompleteListener {
-        ImportExportResult result;
-
-        public void onTaskComplete(ImportExportResult result, DataFormat dataFormat) {
-            this.result = result;
-        }
-    }
-
-    @Test
-    @LooperMode(LooperMode.Mode.PAUSED)
-    public void useImportExportTask() throws FileNotFoundException {
-        final int NUM_CARDS = 10;
-
-        final File sdcardDir = Environment.getExternalStorageDirectory();
-        final File exportFile = new File(sdcardDir, "Catima.csv");
-
-        TestHelpers.addLoyaltyCards(mDatabase, NUM_CARDS);
-
-        TestTaskCompleteListener listener = new TestTaskCompleteListener();
-
-        // Export to the file
-        final String password = "123456789";
-        FileOutputStream fileOutputStream = new FileOutputStream(exportFile);
-        ImportExportTask task = new ImportExportTask(activity, DataFormat.Catima, fileOutputStream, password.toCharArray(), listener);
-        TaskHandler mTasks = new TaskHandler();
-        mTasks.executeTask(TaskHandler.TYPE.EXPORT, task);
-
-        // Actually run the task to completion
-        mTasks.flushTaskList(TaskHandler.TYPE.EXPORT, false, false, true);
-        shadowOf(Looper.getMainLooper()).idleFor(Duration.ofMillis(5000));
-        ShadowLooper.runUiThreadTasksIncludingDelayedTasks();
-
-
-        // Check that the listener was executed
-        assertNotNull(listener.result);
-        assertEquals(ImportExportResultType.Success, listener.result.resultType());
-
-        TestHelpers.getEmptyDb(activity);
-
-        // Import everything back from the default location
-
-        listener = new TestTaskCompleteListener();
-
-        FileInputStream fileStream = new FileInputStream(exportFile);
-
-        task = new ImportExportTask(activity, DataFormat.Catima, fileStream, password.toCharArray(), listener);
-        mTasks.executeTask(TaskHandler.TYPE.IMPORT, task);
-
-        // Actually run the task to completion
-        // I am CONVINCED there must be a better way than to wait on this Queue with a flush.
-        mTasks.flushTaskList(TaskHandler.TYPE.IMPORT, false, false, true);
-        shadowOf(Looper.getMainLooper()).idleFor(Duration.ofMillis(5000));
-        ShadowLooper.runUiThreadTasksIncludingDelayedTasks();
-
-        // Check that the listener was executed
-        assertNotNull(listener.result);
-        assertEquals(ImportExportResultType.Success, listener.result.resultType());
-
-        assertEquals(NUM_CARDS, DBHelper.getLoyaltyCardCount(mDatabase));
-
-        checkLoyaltyCards();
-
-        // Clear the database for the next format under test
-        TestHelpers.getEmptyDb(activity);
-    }
-
     @Test
     public void importWithoutColorsV1() {
         InputStream inputStream = getClass().getResourceAsStream("catima_v1_no_colors.csv");