show warning on back pressed during update check

1 files changed, 16 insertions, 1 deletions

diff --git a/src/main/java/eu/siacs/conversations/ui/UpdaterActivity.java b/src/main/java/eu/siacs/conversations/ui/UpdaterActivity.java
index f18b8fdab..535fda29a 100644
--- a/src/main/java/eu/siacs/conversations/ui/UpdaterActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/UpdaterActivity.java
@@ -265,8 +265,23 @@ public class UpdaterActivity extends Activity {
         }
     };
 
-    //disable back button
+    //show warning on back pressed
     @Override
     public void onBackPressed() {
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+        builder.setMessage(R.string.cancel_update)
+                .setCancelable(false)
+                .setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int id) {
+                        UpdaterActivity.this.finish();
+                    }
+                })
+                .setNegativeButton(R.string.no, new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int id) {
+                        dialog.cancel();
+                    }
+                });
+        AlertDialog alert = builder.create();
+        alert.show();
     }
 }