commit b770659805c99fd71dbeba9af3b097c49f17e264
author Jack Yu <jackyu@google.com> Wed May 08 10:29:38 2019 -0700
committer Jack Yu <jackyu@google.com> Wed May 08 14:39:55 2019 -0700
tree 498c79647308ec97c0f8ca61958bacc79c37df02
parent 4f453788f69eb3ba0dbbf3ccef392220b28d3e35

Fixed no alert text shown when there is alert

Fixed by hiding the text when there is alert, and
then unhide it when there is no alerts at beginning
or after history cleared.

Test: Manual
Bug: 131642555
Merged-In: Ieca1bc28a6aee52a699ee408888087e30edf1d54
Change-Id: Ieca1bc28a6aee52a699ee408888087e30edf1d54
(cherry picked from commit 468b75b68ca0642cd3c4203760790f99072b373a)

src/com/android/cellbroadcastreceiver/CellBroadcastListActivity.java

diff --git a/src/com/android/cellbroadcastreceiver/CellBroadcastListActivity.java b/src/com/android/cellbroadcastreceiver/CellBroadcastListActivity.java
index 1c1bf21..dde4042 100644
--- a/src/com/android/cellbroadcastreceiver/CellBroadcastListActivity.java
+++ b/src/com/android/cellbroadcastreceiver/CellBroadcastListActivity.java
@@ -44,6 +44,7 @@
 import android.view.ViewGroup;
 import android.widget.CursorAdapter;
 import android.widget.ListView;
+import android.widget.TextView;
 
 import java.util.ArrayList;
 
@@ -166,6 +167,7 @@
             // old cursor once we return.)
             mAdapter.swapCursor(data);
             getActivity().invalidateOptionsMenu();
+            updateNoAlertTextVisibility();
         }
 
         @Override
@@ -206,6 +208,21 @@
                     }
                 };
 
+        private void updateNoAlertTextVisibility() {
+            TextView noAlertsTextView = getActivity().findViewById(R.id.empty);
+            if (noAlertsTextView != null) {
+                noAlertsTextView.setVisibility(!hasAlertsInHistory()
+                        ? View.VISIBLE : View.INVISIBLE);
+            }
+        }
+
+        /**
+         * @return {@code true} if the alert history database has any item
+         */
+        private boolean hasAlertsInHistory() {
+            return mAdapter.getCursor().getCount() > 0;
+        }
+
         @Override
         public boolean onContextItemSelected(MenuItem item) {
             Cursor cursor = mAdapter.getCursor();