b/2555049 Will only query accounts once when entering Calendars screen

There was noticeable jitter on entering the Calendars screen including
misregistering taps due to the cursor requerying repeatedly during a
sync. This change makes it so we only query on accounts once and then
will requery every five seconds for about a minute. The view will only
be updated if a change has occurred.

Change-Id: I53610836e78d970d452d4c9724a2d3525cd85482

1 files changed, 48 insertions, 0 deletions

diff --git a/src/com/android/calendar/Utils.java b/src/com/android/calendar/Utils.java
index 8b2660de..adba8214 100644
--- a/src/com/android/calendar/Utils.java
+++ b/src/com/android/calendar/Utils.java
@@ -22,6 +22,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.database.Cursor;
+import android.database.MatrixCursor;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.GradientDrawable;
 import android.net.Uri;
@@ -91,6 +92,53 @@ public class Utils {
         return time;
     }
 
+    public static MatrixCursor matrixCursorFromCursor(Cursor cursor) {
+        MatrixCursor newCursor = new MatrixCursor(cursor.getColumnNames());
+        int numColumns = cursor.getColumnCount();
+        String data[] = new String[numColumns];
+        cursor.moveToPosition(-1);
+        while (cursor.moveToNext()) {
+            for (int i = 0; i < numColumns; i++) {
+                data[i] = cursor.getString(i);
+            }
+            newCursor.addRow(data);
+        }
+        return newCursor;
+    }
+
+    /**
+     * Compares two cursors to see if they contain the same data.
+     *
+     * @return Returns true of the cursors contain the same data and are not null, false
+     * otherwise
+     */
+    public static boolean compareCursors(Cursor c1, Cursor c2) {
+        if(c1 == null || c2 == null) {
+            return false;
+        }
+
+        int numColumns = c1.getColumnCount();
+        if (numColumns != c2.getColumnCount()) {
+            return false;
+        }
+
+        if (c1.getCount() != c2.getCount()) {
+            return false;
+        }
+
+        c1.moveToPosition(-1);
+        c2.moveToPosition(-1);
+        while(c1.moveToNext() && c2.moveToNext()) {
+            for(int i = 0; i < numColumns; i++) {
+                if(!c1.getString(i).equals(c2.getString(i))) {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+
     /**
      * If the given intent specifies a time (in milliseconds since the epoch),
      * then that time is returned. Otherwise, the current time is returned.