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
Change-Id: Ieca1bc28a6aee52a699ee408888087e30edf1d54

1 files changed, 17 insertions, 0 deletions

diff --git a/src/com/android/cellbroadcastreceiver/CellBroadcastListActivity.java b/src/com/android/cellbroadcastreceiver/CellBroadcastListActivity.java
index 1c1bf217e..dde4042ad 100644
--- a/src/com/android/cellbroadcastreceiver/CellBroadcastListActivity.java
+++ b/src/com/android/cellbroadcastreceiver/CellBroadcastListActivity.java
@@ -44,6 +44,7 @@ import android.view.View.OnCreateContextMenuListener;
 import android.view.ViewGroup;
 import android.widget.CursorAdapter;
 import android.widget.ListView;
+import android.widget.TextView;
 
 import java.util.ArrayList;
 
@@ -166,6 +167,7 @@ public class CellBroadcastListActivity extends Activity {
             // old cursor once we return.)
             mAdapter.swapCursor(data);
             getActivity().invalidateOptionsMenu();
+            updateNoAlertTextVisibility();
         }
 
         @Override
@@ -206,6 +208,21 @@ public class CellBroadcastListActivity extends Activity {
                     }
                 };
 
+        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();