import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
-// We have to use `AppCompatDialogFragment` instead of `DialogFragment` or an error is produced on API <=22.
+// `AppCompatDialogFragment` must be used instead of `DialogFragment` or an error is produced on API <=22.
import android.support.v7.app.AppCompatDialogFragment;
import android.view.View;
import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.Button;
import android.widget.CursorAdapter;
import android.widget.ImageView;
import android.widget.ListView;
// Create an `AlertDialog` from the `AlertDialog.Builder`.
final AlertDialog alertDialog = dialogBuilder.create();
- // We need to show the `AlertDialog` before we can modify items in the layout.
+ // Show the `AlertDialog` so the items in the layout can be modified.
alertDialog.show();
+ // Get a handle for the positive button.
+ final Button moveButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
+
+ // Initially disable the positive button.
+ moveButton.setEnabled(false);
+
// Initialize the `Cursor` and `CursorAdapter` variables.
Cursor foldersCursor;
CursorAdapter foldersCursorAdapter;
ListView foldersListView = (ListView) alertDialog.findViewById(R.id.move_to_folder_listview);
foldersListView.setAdapter(foldersCursorAdapter);
+ // Enable the move button when a folder is selected.
+ foldersListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+ @Override
+ public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+ // Enable the move button.
+ moveButton.setEnabled(true);
+ }
+ });
+
// `onCreateDialog` requires the return of an `AlertDialog`.
return alertDialog;
}