我在一个活动中有片段。其中一个片段包含一个recyclerview，它将列出添加在其他片段中的项目。当我去其他片段点击导航抽屉项目并回到列表碎片时，项目只是增加了消失。
这是我的列表片段
public class ListaIncidenciasTroncalFragment extends Fragment {
Context context;
Incidencia incidencia = new Incidencia();
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
if (savedInstanceState==null){}
else {}
}
private RecyclerView rvListaIncidencias;
private ListaIncidenciasTroncalAdapter mlistaIncidenciasTroncalAdapter;
public ListaIncidenciasTroncalFragment() {
// Required empty public constructor
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
@Override
public void onPause() {
super.onPause();
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
@Override
public void onViewStateRestored(@Nullable Bundle savedInstanceState) {
super.onViewStateRestored(savedInstanceState);
}
//METODO PARA CAPTURAR EL BOTON BACK EN UN FRAGMENTO
@Override
public void onResume() {
super.onResume();
if(getView() == null){
return;
}
getView().setFocusableInTouchMode(true);
getView().requestFocus();
getView().setOnKeyListener(new View.OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (event.getAction() == KeyEvent.ACTION_UP && keyCode == KeyEvent.KEYCODE_BACK){
return true;
}
return false;
}
});
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
setRetainInstance(true);
final View x = inflater.inflate(R.layout.listaincidenciastroncalfragment,null);
context = x.getContext();
detector = new GestureDetector(getActivity(), new RecyclerViewOnGestureListener());
rvListaIncidencias=(RecyclerView)x.findViewById(R.id.rv_listaIncidenciasTroncal);
// mLayoutManager = new LinearLayoutManager(getActivity());
rvListaIncidencias.setLayoutManager(new LinearLayoutManager(getContext()));
//rvListaIncidencias.setLayoutManager(mLayoutManager);
mlistaIncidenciasTroncalAdapter = new ListaIncidenciasTroncalAdapter();
rvListaIncidencias.setAdapter(mlistaIncidenciasTroncalAdapter);
mlistaIncidenciasTroncalAdapter.notifyDataSetChanged();
Bundle args = getArguments();
if (args != null) {
incidencia = args.getParcelable("newIncident");
mlistaIncidenciasTroncalAdapter.add(incidencia);
} else {
}
return x;
}
}
这是在添加片段
的createView内部 addbutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ListaIncidenciasTroncalFragment fragmentGet = new ListaIncidenciasTroncalFragment();
Bundle bundle = new Bundle();
bundle.putParcelable("NewIncidencia", incidencia);
fragmentGet.setArguments(bundle);
//Next lines is necessary to pass the bundle to the fragment but
//this means go to the listfragment after addclick (I DONT WANT IT).
//I want it to show another fragment after add click
FragmentManager manager= getFragmentManager();
manager.beginTransaction().replace(R.id.containerView,fragmentGet).commit();
}
这是适配器
public class ListaIncidenciasTroncalAdapter extends RecyclerView.Adapter<ListaIncidenciasTroncalAdapter.ListaIncidenciasTroncalAdapterViewHolder>
{
private List<Incidencia> mLstIncidencia = new ArrayList<>();
//private OnItemClickListener listener;
public void add(Incidencia incidencia){
mLstIncidencia.add(incidencia);
notifyItemInserted(mLstIncidencia.size()-1);
}
@Override
public ListaIncidenciasTroncalAdapter.ListaIncidenciasTroncalAdapterViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.listaincidencias_item,parent,false);
ListaIncidenciasTroncalAdapterViewHolder mlistaIncidenciasTroncalAdapterViewHolder = new ListaIncidenciasTroncalAdapterViewHolder(view);
return mlistaIncidenciasTroncalAdapterViewHolder;
}
@Override
public void onBindViewHolder(ListaIncidenciasTroncalAdapter.ListaIncidenciasTroncalAdapterViewHolder holder, final int position) {
final Incidencia incidencia= mLstIncidencia.get(position);
holder.tv_FechaRegistro.setText("Registro: "+ incidencia.getFechaRegistro()+" - "+incidencia.getHoraRegistro());
holder.tv_Falla.setText(incidencia.getTipoFalla());
holder.tv_Estacion.setText(incidencia.getNomEstacion());
holder.tv_FechaSolucion.setText("Solucion: "+incidencia.getFechaSolucion()+" - "+incidencia.getHoraSolucion());
}
@Override
public int getItemCount() {
return mLstIncidencia.size();
}
static class ListaIncidenciasTroncalAdapterViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
//private OnItemClickListener listener;
TextView tv_FechaRegistro, tv_Falla, tv_Estacion,tv_FechaSolucion;
LinearLayout linearLayout;
public DetalleIncidencia detalleincidencia;
public ListaIncidenciasTroncalAdapterViewHolder(View itemView) {
super(itemView);
tv_FechaRegistro= (TextView) itemView.findViewById(R.id.tvRegistro);
tv_Falla= (TextView) itemView.findViewById(R.id.tvFalla);
tv_Estacion= (TextView) itemView.findViewById(R.id.tvEstacion);
tv_FechaSolucion= (TextView) itemView.findViewById(R.id.tvSolucion);
final Context context = itemView.getContext();
//detalleincidencia=(DetalleIncidencia) itemView.findViewById(R.id.)
linearLayout=(LinearLayout) itemView.findViewById(R.id.linearItem);
}
@Override
public void onClick(View v) {
int pos = getAdapterPosition();
}
}}
这是包含片段的主要活动
public class MainActivity extends ActionBarActivity implements IngresoIncidenciaTroncalFragment.OnButtonClickedListener{
DrawerLayout mDrawerLayout;
NavigationView mNavigationView;
FragmentManager mFragmentManager;
FragmentTransaction mFragmentTransaction;
TextView tvNombre, tvEmail;
Bundle mContent;
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState != null) {
}
//SETEO EL DRAWERLAYOUT Y EL NAVIGATIONVIEW
final Toolbar mitoolbar = (Toolbar) findViewById(R.id.toolbar);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
mNavigationView = (NavigationView) findViewById(R.id.shitstuff) ;
setSupportActionBar(mitoolbar);
tvNombre=(TextView) findViewById(R.id.txtNombreUsuario);
//ACA INFLO EL PRIMER FRAGMENTO QUE SERA EL FONDO DEL NAVIGATION DRAWER CUANDO SE ABRA LA APP
mFragmentManager = getSupportFragmentManager();
mFragmentTransaction = mFragmentManager.beginTransaction();
mFragmentTransaction.replace(R.id.containerView,new FondoInicioFragment()).commit();
//EVENTO CLICK DE CADA ITEM DEL NAVIGATION VIEW
mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
mDrawerLayout.closeDrawers();
if (menuItem.getItemId() == R.id.nav_item_ingresoIncidencia) {
FragmentTransaction fragmentTransaction = mFragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.containerView,new IngresoIncidenciaTroncalFragment()).commit();
mitoolbar.setTitle("Ingreso Incidencia Troncal");
}
else if (menuItem.getItemId() == R.id.nav_item_listarIncidencia) {
FragmentTransaction fragmentTransaction = mFragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.containerView,new ListaIncidenciasTroncalFragment()).commit();
mitoolbar.setTitle("Lista Incidencias Troncal");
}
return false;
}
});
//SETUP DRAWER TOGGLE OF THE TOOLBAR
android.support.v7.widget.Toolbar toolbar = (android.support.v7.widget.Toolbar) findViewById(R.id.toolbar);
ActionBarDrawerToggle mDrawerToggle = new ActionBarDrawerToggle(this,mDrawerLayout, toolbar,R.string.app_name,
R.string.app_name);
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerToggle.syncState();
}
//METODO IMPLEMENTADO DE INGRESOINCIDENCIATRONCALFRAGMENT PARA PONERLE UN KEY A LA INCIDENCIA AGREGADA Y ASI
// SE LA PUEDA MANDAR A LA LISTA DE INCIDENCIAS
public void onButtonClicked(Incidencia incidencia){
ListaIncidenciasTroncalFragment fragment = new ListaIncidenciasTroncalFragment();
Bundle args = new Bundle();
args.putParcelable("newIncident", incidencia);
fragment.setArguments(args);
getSupportFragmentManager().beginTransaction().replace(R.id.containerView, fragment).commit();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item){
int id = item.getItemId();
return super.onOptionsItemSelected(item);
}
}