Android: run openParentDirectory() in a different thread.

The Document Provider framework will implement access to network
services in the future, and network operations must be run in separate
threads.

Change-Id: Ifcba8f28cc4dbffaf2946c12749aa38d0eb11923

1 files changed, 17 insertions, 1 deletions

diff --git a/android/experimental/LOAndroid3/src/java/org/libreoffice/ui/LibreOfficeUIActivity.java b/android/experimental/LOAndroid3/src/java/org/libreoffice/ui/LibreOfficeUIActivity.java
index 5606b1c1b395..8c93b418a776 100644
--- a/android/experimental/LOAndroid3/src/java/org/libreoffice/ui/LibreOfficeUIActivity.java
+++ b/android/experimental/LOAndroid3/src/java/org/libreoffice/ui/LibreOfficeUIActivity.java
@@ -289,6 +289,22 @@ public class LibreOfficeUIActivity extends LOAbout implements ActionBar.OnNaviga
         }
     }
 
+    private void openParentDirectory() {
+        new AsyncTask<Void, Void, IFile>() {
+            @Override
+            protected IFile doInBackground(Void... dir) {
+                // this operation may imply network access and must be run in
+                // a different thread
+                return currentDirectory.getParent();
+            }
+
+            @Override
+            protected void onPostExecute(IFile result) {
+                openDirectory(result);
+            }
+        }.execute();
+    }
+
     private void share(int position) {
         File file = filePaths.get(position).getDocument();
         Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
@@ -323,7 +339,7 @@ public class LibreOfficeUIActivity extends LOAbout implements ActionBar.OnNaviga
         switch (item.getItemId()) {
             case android.R.id.home:
                 if( !currentDirectory.equals( homeDirectory ) ){
-                    openDirectory(currentDirectory.getParent());
+                    openParentDirectory();
                 }
                 break;
             case R.id.menu_view_toggle: