fix: Added a progress dialog while deleting the forms.

collect_app/src/main/java/org/odk/collect/android/fragments/DataManagerList.java

@@ -15,6 +15,7 @@
 package org.odk.collect.android.fragments;
 
 import android.app.AlertDialog;
+import android.app.ProgressDialog;
 import android.content.DialogInterface;
 import android.database.Cursor;
 import android.os.AsyncTask;
@@ -55,12 +56,12 @@ public class DataManagerList extends InstanceListFragment
     DeleteInstancesTask deleteInstancesTask = null;
     private AlertDialog alertDialog;
     private InstanceSyncTask instanceSyncTask;
+    private ProgressDialog progressDialog;
 
     public static DataManagerList newInstance() {
         return new DataManagerList();
     }
 
-
     @Nullable
     @Override
     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
@@ -193,12 +194,24 @@ public void onClick(DialogInterface dialog, int i) {
         alertDialog.show();
     }
 
+    @Override
+    public void progressUpdate(int progress, int total) {
+        String message = String.format(getResources().getString(R.string.deleting_form_dialog_update_message),progress,total);
+        progressDialog.setMessage(message);
+    }
+
     /**
      * Deletes the selected files. Content provider handles removing the files
      * from the filesystem.
      */
     private void deleteSelectedInstances() {
         if (deleteInstancesTask == null) {
+            progressDialog = new ProgressDialog(getContext());
+            progressDialog.setMessage(getResources().getString(R.string.form_delete_message));
+            progressDialog.setIndeterminate(true);
+            progressDialog.setCancelable(false);
+            progressDialog.show();
+
             deleteInstancesTask = new DeleteInstancesTask();
             deleteInstancesTask.setContentResolver(getActivity().getContentResolver());
             deleteInstancesTask.setDeleteListener(this);
@@ -230,12 +243,15 @@ public void deleteComplete(int deletedInstances) {
                     String.valueOf(toDeleteCount - deletedInstances),
                     String.valueOf(toDeleteCount)));
         }
+
         deleteInstancesTask = null;
         getListView().clearChoices(); // doesn't unset the checkboxes
         for (int i = 0; i < getListView().getCount(); ++i) {
             getListView().setItemChecked(i, false);
         }
         deleteButton.setEnabled(false);
+
+        progressDialog.dismiss();
     }
 
     @Override

collect_app/src/main/java/org/odk/collect/android/listeners/DeleteInstancesListener.java

@@ -22,4 +22,6 @@
  */
 public interface DeleteInstancesListener {
     void deleteComplete(int deletedInstances);
+
+    void progressUpdate(int progress, int total);
 }

collect_app/src/main/java/org/odk/collect/android/tasks/DeleteInstancesTask.java

@@ -30,7 +30,7 @@
  * @author norman86@gmail.com
  * @author mitchellsundt@gmail.com
  */
-public class DeleteInstancesTask extends AsyncTask<Long, Void, Integer> {
+public class DeleteInstancesTask extends AsyncTask<Long, Integer, Integer> {
 
 
     private ContentResolver contentResolver;
@@ -65,6 +65,10 @@ protected Integer doInBackground(Long... params) {
                 if (wasDeleted > 0) {
                     Collect.getInstance().getActivityLogger().logAction(this, "delete", deleteForm.toString());
                 }
+
+                successCount++;
+                publishProgress(successCount,toDeleteCount);
+
             } catch (Exception ex) {
                 Timber.e("Exception during delete of: %s exception: %s", param.toString(), ex.toString());
             }
@@ -73,6 +77,15 @@ protected Integer doInBackground(Long... params) {
         return deleted;
     }
 
+    @Override
+    protected void onProgressUpdate(Integer... values) {
+        synchronized (this) {
+            if (deleteInstancesListener != null) {
+                deleteInstancesListener.progressUpdate(values[0],values[1]);
+            }
+        }
+    }
+
     @Override
     protected void onPostExecute(Integer result) {
         contentResolver = null;

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

@@ -508,5 +508,7 @@
     <string name="invalid_email_address">Invalid email address!</string>
     <string name="sort_by">Sort by</string>
     <string name="server">Server</string>
+    <string name="form_delete_message">Deleting selected forms</string>
+    <string name="deleting_form_dialog_update_message">Deleting form: %1$d out of %2$d </string>
     <string name="search">Search</string>
 </resources>