When I change the orientation of my mobile phone, the text content is not saved and the default text is put in the textview, in my android manifest in my activity Cafeteria I have this
android:configChanges="keyboardHidden|orientation"
Cafeteria
public class Cafeteria extends BaseActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_cafeteria);
/*Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);*/
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_cafeteria, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position){
case 0:
Oferta oferta = new Oferta();
return oferta;
case 1:
MenuCafe men = new MenuCafe();
return men;
case 2:
Carta carta = new Carta();
return carta;
default:
return null;
}
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return getString(R.string.ofertas);
case 1:
return getString(R.string.menu);
case 2:
return getString(R.string.carta);
}
return null;
}
}
MenuCafe
public class MenuCafe extends Fragment{
private RecyclerView recyclerView;
private LinearLayoutManager linearLayoutManager;
private AdaptadorMenu adapter;
private List<Menu> menu;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_menu, container, false);
recyclerView = (RecyclerView) rootView.findViewById(R.id.recycler_view_menu);
menu = new ArrayList<>();
load_data_from_server(0);
linearLayoutManager = new LinearLayoutManager(getContext());
recyclerView.setLayoutManager(linearLayoutManager);
adapter = new AdaptadorMenu(getContext(),menu);
recyclerView.setAdapter(adapter);
return rootView;
}
}
Thank you for the help
Try giving this in Android manifest file
android:screenOrientation="portrait"
You must save text content , because when rotation screen ,your activity will reset life cycle of android, same as first open.
See how to save the status here: Losing data when rotate screen
Related
I have two tabs in my application each having gridview holding 20+ imageviews. I successfully implemented what I want but problem is that when I swipe from first tab to the second, the transition is not smooth. I am using the same adapter for both the gridviews.
Below is my adapter implementation
public class LogoImageAdapter extends BaseAdapter{
private Context context;
private List<Integer> logoIds;
public LogoImageAdapter(Context context, List<Integer> logoIds) {
this.context = context;
this.logoIds = logoIds;
}
#Override
public int getCount() {
return logoIds.size();
}
#Override
public Object getItem(int position) {
return logoIds.get(position);
}
#Override
public long getItemId(int position) {
return logoIds.get(position);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View gridView;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
gridView = inflater.inflate(R.layout.grid_item, null);
} else {
gridView = convertView;
}
/*TextView title = (TextView) gridView.findViewById(R.id.siteNameTV);
title.setText("Title_" + position);*/
ImageView logoImage = (ImageView) gridView.findViewById(R.id.logoImageView);
logoImage.setImageResource(logoIds.get(position));
return gridView;
}
}
Please help me to get smooth tab transition.
Edit: ViewPager implementation
public class HomepageActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_homepage);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
if (getSupportActionBar()!=null)
getSupportActionBar().setDisplayShowTitleEnabled(false);
// Create the adapter that will return a fragment for each of the primary sections/tabs of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_items, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.mShare:
shareApplication();
break;
}
return super.onOptionsItemSelected(item);
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new Homepage();
case 1:
return new Classified();
case 2:
return new Tourism();
case 3:
return new Shopping();
case 4:
return new Travel();
default:
return null;
}
}
#Override
public int getCount() {
// number of tabs.
return Constants.TAB_NUMBER;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return Constants.TAB_HOMEPAGE;
case 1:
return Constants.TAB_CLASSIFIED;
case 2:
return Constants.TAB_TOURISM;
case 3:
return Constants.TAB_SHOPPING;
case 4:
return Constants.TAB_TRAVEL;
default:
return null;
}
}
}
}
It seams you use same adapter to load images for two tabs and so there can be some delay. Then check your images sizes whether large or small size of images(High Resolutions). Because large size of images grid view may cause to make same delay when load the adapter. I also had that experience before and i reduce the size of images and reduce the delay.
I am creating an application with 3 tabs. I have taken the code for a notepad-like app from here, and what I want is to put the notepad in a fragment inside a tab. I have done this but whenever I add a new note it is not reflected in the tab. I think I will have to use notifyDataSetChanged() but I am having difficulty as to where I can use it. Some help will be appreciated.
I have put a FAB in the tab. When I click it the app goes to the DisplayNote where I can enter the note title and content for the note as in the original app. I have confirmed that when I click "Save" the note is saved but the tab does not show this.
This is the relevant code for my MainActivity:
public class MainActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
}
}
This is the code for the Adapter:
class SectionsPagerAdapter extends FragmentStatePagerAdapter {
SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new Tab1();
case 1:
return new Tab2();
case 2:
return new Tab3();
default:
return null;
}
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Tab 1";
case 1:
return "Tab 2";
case 2:
return "Notes";
default:
return null;
}
}
And this is the code for the third tab:
public class Tab3Notes extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.mynotes, container, false);
FloatingActionButton add_note;
add_note = (FloatingActionButton) rootView.findViewById(R.id.add_note_button);
add_note.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Bundle dataBundle = new Bundle();
dataBundle.putInt("id", 0);
Intent intent = new Intent(getContext(), DisplayNote.class);
intent.putExtras(dataBundle);
startActivity(intent);
}
});
return rootView;
}
}
Add this to your SectionsPagerAdapter:
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
Then when you call notifyDatasetChanged, the adapter will think all the pages are new and recreate them
I have a Tabbed Activity with 3 Tabs. On each Tab are RecyclerViews with some list items. If you click on an item a new fragment should open and there should appear a Back-Button in the toolbar. My current screen looks like this:
And now I will show you my code. At first MainActivity.java with the TabLayout:
public class MainActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
private Toolbar toolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setTitle("Pflege");
setSupportActionBar(toolbar);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
tabLayout.getTabAt(0).setIcon(R.drawable.tab_icon_pflege);
tabLayout.getTabAt(1).setIcon(R.drawable.tab_icon_dokumentation);
tabLayout.getTabAt(2).setIcon(R.drawable.tab_icon_probleme);
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
switch(tab.getPosition()) {
case 0:
mViewPager.setCurrentItem(0);
toolbar.setTitle("Pflege");
break;
case 1:
mViewPager.setCurrentItem(1);
toolbar.setTitle("Daten");
break;
case 2:
mViewPager.setCurrentItem(2);
toolbar.setTitle("Probleme");
break;
default:
mViewPager.setCurrentItem(tab.getPosition());
toolbar.setTitle("Pflege");
break;
}
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch(position){
case 0:
Tab1Pflege tab1 = new Tab1Pflege();
return tab1;
case 1:
Tab2Dokumentation tab2 = new Tab2Dokumentation();
return tab2;
case 2:
Tab3Probleme tab3 = new Tab3Probleme();
return tab3;
default:
return null;
}
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Pflege";
case 1:
return "Daten";
case 2:
return "Probleme";
}
return null;
}
}
}
Here is the Fragment for the first tab with the RecyclerView:
public class Tab1Pflege extends Fragment {
private RecyclerView recyclerView;
private RecyclerView.Adapter rvAdapter;
private RecyclerView.LayoutManager rvLayoutManager;
private ArrayList<String> listItems;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.tab1_pflege, container, false);
listItems = new ArrayList<>();
listItems.add("Test1");
listItems.add("Test2");
listItems.add("Test3");
recyclerView = (RecyclerView) rootView.findViewById(R.id.recyclerView);
rvLayoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(rvLayoutManager);
rvAdapter = new RvAdapter(listItems);
recyclerView.setAdapter(rvAdapter);
return rootView;
}
}
And here is my RecyclerView Adapter:
public class RvAdapter extends RecyclerView.Adapter<RvAdapter.MyViewHolder> {
ArrayList<String> listItems;
public RvAdapter (ArrayList<String> listItems){
this.listItems = listItems;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.rv_item_layout, null);
return new MyViewHolder(itemView);
}
#Override
public void onBindViewHolder(MyViewHolder holder, final int position) {
holder.itemTitle.setText(listItems.get(position));
holder.itemImage.setImageResource(R.drawable.ic_keyboard_arrow_right);
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
System.out.println(listItems.get(position));
}
});
}
#Override
public int getItemCount() {
return listItems.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder{
TextView itemTitle;
ImageView itemImage;
public MyViewHolder(View itemView){
super(itemView);
itemTitle = (TextView) itemView.findViewById(R.id.itemTitle);
itemImage = (ImageView) itemView.findViewById(R.id.itemImage);
}
}
}
In this class is an onClickListener for clicking on a list item. And there I want to open a new fragment for example for Test1. On top of that there should appear a Back-Button in the toolbar to navigate back to the Tab1 Overview with the RecyclerView. But I have no idea how to do that. Can someone help me with it?
In onClick, you can do something like this (to load another fragment)
FragmentTransaction trans = getSupportFragmentManager().beginTransaction();
Fragment fragment = // TODO: initialise your fragment 'fragment'
mFragments.push(fragment);
// Animation, if need it
// trans.setCustomAnimations(R.anim.right_in, R.anim.left_out,
// R.anim.right_out, R.anim.left_in);
// _container is the id of 'fragment' container in the your xml
trans.replace(R.id._container, fragment);
// variable to identify this fragment, and title of the page as well
String name = // TODO: initialise
trans.addToBackStack(name);
trans.commit();
getSupportActionBar().setTitle(name);
and in onCreate of your activity, setup listener for back stack changes.
FragmentManager manager = getSupportFragmentManager();
manager.addOnBackStackChangedListener(mBackStackListener);
and you can change back icon in
private OnBackStackChangedListener mBackStackListener = new OnBackStackChangedListener() {
#Override
public void onBackStackChanged() {
FragmentManager manager = getSupportFragmentManager();
int count = manager.getBackStackEntryCount();
if(count > 0) {
// TODO: Show back icon
} else {
// TODO: Other icon
}
}
};
How can I hide the fab on the other tabs and only show it on the first tab? I'm using the GET_ARGUMENTS to select between activities. Help please. Here is my code. Thanks.
public class OwnerTabs extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
SharedPreferences pref;
SharedPreferences.Editor editor;
private Button btnStart, btnStop;
private TextView tvCoordinates;
private BroadcastReceiver broadcastReceiver;
FloatingActionButton fab;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_owner_tabs);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
pref = getSharedPreferences("Login.conf", Context.MODE_PRIVATE);
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setOffscreenPageLimit(2);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent in = new Intent(OwnerTabs.this, InsertActivity.class);
startActivity(in);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main,menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if(id == R.id.action_logout){
editor = pref.edit();
editor.clear();
editor.commit();
Intent in = new Intent (getApplicationContext(), MainActivity.class);
startActivity(in);
finish();
}
return super.onOptionsItemSelected(item);
}
public static class PlaceholderFragment extends Fragment {
private static final String ARG_SECTION_NUMBER = "section_number";
public PlaceholderFragment() {
}
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (getArguments().getInt(ARG_SECTION_NUMBER) == 1){
View rootView = inflater.inflate(R.layout.content_ownerhome, container, false);
return rootView;
}
else if(getArguments().getInt(ARG_SECTION_NUMBER) == 2){
View rootView = inflater.inflate(R.layout.content_rented, container, false);
return rootView;
}
else if (getArguments().getInt(ARG_SECTION_NUMBER) == 3){
View rootView = inflater.inflate(R.layout.content_gps, container, false);
return rootView;
}
else {
View rootView = inflater.inflate(R.layout.fragment_owner_tabs, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.section_label);
textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
}
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
return PlaceholderFragment.newInstance(position + 1);
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Your Cars";
case 1:
return "Pending Cars";
case 2:
return "GPS";
}
return null;
}
}
Thanks for the help guys, hoping to get a kind response and not an arrogant one. :)
Add a on tab selected listener, and then put on the tab index you want, and call fab.hide()
I am trying to figure out how to insert a listview inside a fragment (which is inside a tablayout and a viewpager). The app is crashing all time when I don't comment lstOpciones.setAdapter(adaptador);
The current code is this one:
Main Activity
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.appbar);
//Use NoActionBar theme in styles
setSupportActionBar(toolbar);
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
viewPager.setAdapter(new MainFragmentPageAdapter(
getSupportFragmentManager()));
TabLayout tabLayout = (TabLayout) findViewById(R.id.appbartabs);
tabLayout.setTabMode(TabLayout.MODE_FIXED);
tabLayout.setupWithViewPager(viewPager);
}
#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;
}
}
MainFragmentPageAdapter class:
public class MainFragmentPageAdapter extends FragmentPagerAdapter {
private final int NUMERO_PAGINAS = 3;
private final String tabTitles[] = new String[] {"Llamadas", "Chats", "Contactos"};
public MainFragmentPageAdapter(FragmentManager fm)
{
super(fm);
}
#Override
public Fragment getItem(int position) {
Fragment f = null;
switch(position)
{
case 0:
f = FragmentLlamadas.newInstance();
break;
case 1:
f = FragmentChats.newInstance();
break;
case 2:
f = FragmentContactos.newInstance();
break;
}
return f;
}
#Override
public int getCount() {
return NUMERO_PAGINAS;
}
#Override
public CharSequence getPageTitle(int position) {
// Generate title based on item position
return tabTitles[position];
}
}
Fragment Chats class:
public class FragmentChats extends Fragment {
public FragmentChats() {
//Tiene que estar vacío
}
public static FragmentChats newInstance() {
return new FragmentChats();
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final String[] datos =
new String[]{"Elem1","Elem2","Elem3","Elem4","Elem5"};
ArrayAdapter<String> adaptador =
new ArrayAdapter<String>(getActivity().getApplicationContext(),
android.R.layout.simple_list_item_1, datos);
ListView lstOpciones = (ListView)getActivity().findViewById(R.id.chatlist);
lstOpciones.setAdapter(adaptador);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_chats, container, false);
}
}
Thank you very much
Change your methods like this. You are referencing the listView at wrong place. I assume ListView chatlist is in layout fragment_chats
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_chats, container, false);
final String[] datos =
new String[]{"Elem1","Elem2","Elem3","Elem4","Elem5"};
ArrayAdapter<String> adaptador =
new ArrayAdapter<String>(getActivity().getApplicationContext(),
android.R.layout.simple_list_item_1, datos);
ListView lstOpciones = (ListView)view.findViewById(R.id.chatlist);
lstOpciones.setAdapter(adaptador);
return view;
}