我有一个代码可以在我的应用程序中创建一个文件夹系统，并且我正在尝试安排文件夹以使最新版本保持在最顶层，但是现在最新的文件夹仍然存在。例如，第1个应该是第4个，而第4个应该是第1个（它应该是第1个，第2个，第3个和第4个），但是当我创建它时，它显示为（第4个，第3个，第2个和第1个）。
public void createNewFolder() {
View promptsView = inflater.inflate(R.layout.dialog_add_folder, null);
final Dialog alertDialogBuilder = new Dialog(mContext);
alertDialogBuilder.setContentView(promptsView);
alertDialogBuilder.setTitle("Create new Notebook.");
final EditText editTextName = (EditText) promptsView.findViewById(R.id.editTextName);
final Button buttonOk = (Button) promptsView.findViewById(R.id.buttonOk);
final Button buttonCancel = (Button) promptsView.findViewById(R.id.buttonCancel);
final View colorView = promptsView.findViewById(R.id.colorView);
final GridView gridView = (GridView) promptsView.findViewById(R.id.gridView);
gridView.setVisibility(View.VISIBLE);
final List<String> colors = getColorList();
gridView.setAdapter(new ColorAdapter(colors));
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
colorView.setTag(colors.get(i));
colorView.setBackgroundColor(Color.parseColor(colors.get(i)));
}
});
View.OnClickListener click = new View.OnClickListener() {
@Override
public void onClick(View view) {
if (view == buttonOk) {
String folderName = editTextName.getText().toString().trim();
if (folderName.equalsIgnoreCase("")) {
Toast.makeText(mContext, "Please enter name.", Toast.LENGTH_LONG).show();
return;
}
if (colorView.getTag() == null) {
Toast.makeText(mContext, "Please select note color.", Toast.LENGTH_LONG).show();
return;
}
if (db.folderExistInGroup(currentGroupId, folderName)) {
Toast.makeText(mContext, "Folder name already exist.", Toast.LENGTH_LONG).show();
return;
}
db.createGroup(currentGroupId, folderName, colorView.getTag().toString());
openCurrentGroup();
try {
InputMethodManager mgr = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
mgr.hideSoftInputFromWindow(editTextName.getWindowToken(), 0);
} catch (Exception ex) {
}
alertDialogBuilder.dismiss();
} else if (view == buttonCancel) {
try {
InputMethodManager mgr = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
mgr.hideSoftInputFromWindow(editTextName.getWindowToken(), 0);
} catch (Exception ex) {
}
alertDialogBuilder.dismiss();
}
}
};
buttonOk.setOnClickListener(click);
buttonCancel.setOnClickListener(click);
alertDialogBuilder.show();
}