Question

Has anyone used this class and see if it is broken in android version 3.x and above? It worked fine for me in previous versions. Here’s an example:

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MatrixCursor cursorOne = new MatrixCursor(new String[]{ "_id", "name", "description" }); 

cursorOne.addRow(new Object[]{ 5, "Object 2", "Description 2" }); 
cursorOne.addRow(new Object[]{ 5, "Object 3", "Description 3" }); 
cursorOne.addRow(new Object[]{ 5, "Object 4", "Description 4" }); 
cursorOne.addRow(new Object[]{ 5, "Object 5", "Description 5" }); 

CursorAdapter cursorAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_2, cursorOne, new String[] { "name", "description" }, new int []{ android.R.id.text1, android.R.id.text2 }); 

MatrixCursor cursorTwo = new MatrixCursor(new String[]{ "_id", "name", "description" }); 

cursorTwo.addRow(new Object[]{ 5, "Object 2", "Description 2" }); 
cursorTwo.addRow(new Object[]{ 5, "Object 3", "Description 3" }); 
cursorTwo.addRow(new Object[]{ 5, "Object 4", "Description 4" }); 
cursorTwo.addRow(new Object[]{ 5, "Object 5", "Description 5" }); 

MergeCursor mergeCursor = new MergeCursor(new Cursor[] { cursorOne, cursorTwo }); 

cursorAdapter.changeCursor(mergeCursor);

setListAdapter(cursorAdapter); 
}

It doesn’t show anything, it seems like it’s cleaning the cursors. Am I missing something for the SDK > 3.x?

Answer 1

Okay, I found a solution:

I replaced the CursorAdapter and SimpleCursorAdapter imports for the ones on the compatibility package and used CursorAdapter.swapCursor instead of CursorAdapter.changeCursor.

Seems to be something related that swapCursor does not close the previous cursor.