如何在ListView中重命名项目,然后更新SharedPreferences以便活动(打开后)加载以前的内容而不是空白活动?
我尝试删除该项目,然后在已删除项目的位置添加新项目...点击后,它总是会打开一个新的空白活动...我怎么能让这个工作?提前致谢
switch (item.getItemId()) {
case R.id.rename:
final AlertDialog.Builder alert = new AlertDialog.Builder(getView().getContext());
alert.setTitle("Rename");
final EditText editText = new EditText(getActivity().getApplicationContext());
editText.setTextColor(Color.BLACK);
alert.setView(editText);
jsonArray = new JSONArray();
jsonArrayName = new JSONArray();
try {
jsonArray = new JSONArray(preferences.getString("ListNotes", jsonArray.toString()));
subCategoryName = jsonArray.getString(id);
jsonArrayName = new JSONArray(preferences_notes.getString("subjectNotes", jsonArrayName.toString()));
subCategoryNameRename = jsonArrayName.getString(id);
} catch (Exception e) { }
editText.setText(subCategoryName);
for(int i = 0; i < jsonArrayName.length(); i++) {
try {
arrayListItemName.add(jsonArrayName.get(i).toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
for (int i = 0; i < jsonArray.length(); i++) {
try {
arrayListRename.add(jsonArray.get(i).toString());
} catch (Exception e) {
e.printStackTrace();
}
}
alert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
newSubCategoryName = editText.getText().toString();
subCategoryName = newSubCategoryName;
subCategoryNameRename = subCategoryName;
arrayListRename.remove(id);
arrayListRename.add(id, newSubCategoryName);
Toast.makeText(getActivity().getApplicationContext(), "Updated text: " + subCategoryName, Toast.LENGTH_SHORT).show();
editorNotes.putString("subjectNotes", subCategoryNameRename).apply();
editor.putString("ListNotes", arrayListRename.toString()).apply();
m_adapter_notes.notifyDataSetChanged();
onResume();
}
});