我有一个带有多个EditText的活动，在输入数据后单击按钮SAVE将它们保存在数据库（Mysql）中它打开片段，其中ListView填充了来自数据库的这些数据。 的问题：
ListView没有显示我在活动中输入的新数据!!!，甚至新数据也正确地添加到我的ArrayList中。 但是，当我第二次启动此片段时，它会正确显示Listview的新数据。
我的片段
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_liste_symbole_monetaire, container, false);
symbolMonList.clear();
lv = (SwipeMenuListView) rootView.findViewById(R.id.lv_liste_symboleMon);
adapter = new SymbMoneLvAdapter(getActivity());
FloatingActionButton btn = (FloatingActionButton) rootView.findViewById(R.id.btnAjoutAjoutSymboleMon);
btn.setOnClickListener(new android.view.View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent intent = new Intent(getActivity(), AjouterSymbMoneActivity.class);
startActivity(intent);
}
});
deleteItemLv();
getListSymbolMon();
return rootView;
}
public void deleteItemLv(){
SwipeMenuCreator creator = new SwipeMenuCreator() {
@Override
public void create(SwipeMenu menu) {
// create "open" item
SwipeMenuItem openItem = new SwipeMenuItem(
getActivity());
// set item background
openItem.setBackground(new ColorDrawable(Color.GRAY));
// set item width
openItem.setWidth(dp2px(90));
// set item title
openItem.setTitle("Ouvrir");
// set item title fontsize
openItem.setTitleSize(18);
// set item title font color
openItem.setTitleColor(Color.WHITE);
// add to menu
menu.addMenuItem(openItem);
// create "delete" item
SwipeMenuItem deleteItem = new SwipeMenuItem(
getActivity());
// set item background
deleteItem.setBackground(new ColorDrawable(Color.rgb(0xC9, 0xC9,
0xCE)));
// set item width
deleteItem.setWidth(dp2px(90));
// set a icon
deleteItem.setIcon(R.drawable.ic_delete);
// add to menu
menu.addMenuItem(deleteItem);
}
};
lv.setMenuCreator(creator);
lv.setOnMenuItemClickListener(new SwipeMenuListView.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(int position, SwipeMenu menu, int index) {
switch (index) {
case 0:
//Ouvrir item
break;
case 1:
deleteItemDialog(position);
break;
}
// false : close the menu; true : not close the menu
return false;
}
});
}
public int dp2px(int dp) {
DisplayMetrics displayMetrics = getActivity().getResources().getDisplayMetrics();
int px = Math.round(dp * (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
return px;
}
//Dialog delete item:
public void deleteItemDialog(final int position){
Toast toast = Toast.makeText(getActivity(), "size:"+position, Toast.LENGTH_LONG);
toast.show();
Toast toat = Toast.makeText(getActivity(), "sizeTotal:"+symbolMonList.size(), Toast.LENGTH_LONG);
toat.show();
Toast oast = Toast.makeText(getActivity(), "code:"+symbolMonList.get(position).getCode(), Toast.LENGTH_LONG);
oast.show();
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
getActivity() );
alertDialogBuilder.setTitle("Supprimer");
alertDialogBuilder.setMessage("Voulez vous supprimer ce symbole monétaire?");
alertDialogBuilder
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
String Code = symbolMonList.get(position).getCode();
Call<Void> api =API.deleteSymboleMon("delete", Code);
api.enqueue(new Callback<Void>() {
@Override
public void onResponse(Call<Void> call, Response<Void> response) {
if(response.isSuccessful()){
Toast toast = Toast.makeText(getActivity(), "Symbole Monétaire supprimé", Toast.LENGTH_LONG);
toast.show();
symbolMonList.remove(position);
adapter.notifyDataSetChanged();
}else {
}
}
@Override
public void onFailure(Call<Void> call, Throwable t) {
}
});
}
}
)
.setNegativeButton("Annuler", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
}
);
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
//Get liste des SM
private void getListSymbolMon(){
final ProgressDialog mProgressDialog = new ProgressDialog(getActivity());
mProgressDialog.setIndeterminate(true);
mProgressDialog.setMessage("Chargement en cours...");
Call<List<SymbMoneItems>> api =API.getListSymbolMon();
api.enqueue(new Callback<List<SymbMoneItems>>() {
@Override
public void onResponse(Call<List<SymbMoneItems>> call, Response<List<SymbMoneItems>> response) {
if (response.isSuccessful()){
List<SymbMoneItems> List = response.body();
addListSymbolMon(List);
if (mProgressDialog.isShowing())
mProgressDialog.dismiss();
}else{
if (mProgressDialog.isShowing())
mProgressDialog.dismiss();
Toast toast = Toast.makeText(getActivity(), "Erreur", Toast.LENGTH_LONG);
toast.show();
}
}
@Override
public void onFailure(Call<List<SymbMoneItems>> call, Throwable t) {
Toast toast = Toast.makeText(getActivity(), "Erreur "+t, Toast.LENGTH_LONG);
toast.show();
if (mProgressDialog.isShowing())
mProgressDialog.dismiss();
}
});
}
public void addListSymbolMon(List<SymbMoneItems> lem){
for (int i=0;i< lem.size();i ++){
SymbMoneItems fac = lem.get(i);
symbolMonList.add(fac);
}
adapter.addAll(symbolMonList);
adapter.notifyDataSetChanged();
lv.setAdapter(adapter);
}
public void addAll(ArrayList<SymbMoneItems> result) {
this.listSymb = result;
this.notifyDataSetChanged();
}
感谢您的帮助。
答案 0 :(得分：0)
使用“=”设置数据实际上对适配器的数据集没有任何改变。
更改你的addAll（）方法，如下所示：
public void addAll(ArrayList<SymbMoneItems> result) {
this.listSymb.clear();
this.listSymb.addAll(result);
this.notifyDataSetChanged();
}