I have a RecyclerView in a Fragment which is in a ViewPager hosted in an Activity. There's two Activities in this project MainActivity which lists items and DetailActivity which shows details about the item chosen in the first activity.
When I move from DetailsActivity to MainActivity I am always take to ViewPager Fragment position 0 which is the first Fragment. How can I restore the fragment position?
Bundle is always empty when I move from DetailActivity to MainActivity.
Here is the full code of the app.
MainActivity
public class MainActivity extends AppCompatActivity {
private ViewPager mViewPager;
private static final String LOG = MainActivity.class.getSimpleName();
private static final String VIEWPAGER_POSITION = "currentItem";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_titles);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mViewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(mViewPager);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
if (savedInstanceState != null) {
int pos = savedInstanceState.getInt(VIEWPAGER_POSITION, 0);
Log.d(LOG, "onCreate pos: " + pos);
mViewPager.setCurrentItem(pos);
} else {
Log.d(LOG, "onCreate savedInstanceState is null");
}
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new PopularFragment(), getResources().getString(R.string.popularity));
adapter.addFragment(new RatingFragment(), getResources().getString(R.string.rating));
adapter.addFragment(new FavoriteFragment().newInstance(), getResources().getString(R.string.favorite));
viewPager.setAdapter(adapter);
}
public static class ViewPagerAdapter extends FragmentStatePagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
#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) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onSaveInstanceState(Bundle bundle) {
super.onSaveInstanceState(bundle);
int pos = mViewPager.getCurrentItem();
Log.d(LOG, "onSaveInstanceState pos: " + pos);
bundle.putInt(VIEWPAGER_POSITION, mViewPager.getCurrentItem());
}
}
Thanks.
I am shooting, when you go back from DetailActivity, look for Bundle in
this.getIntent().getExtras().getInt(VIEWPAGER_POSITION, 0)
UPDATE:
if you need persist your current position in for example SharedPreferences in onPause and retrieve it in onResume. like:
private static String MY_PAGER_TAG = "tag_of_shared_vp_position";
public void onPause(){
super.onPause();
int pos = getCurrentViewPagerPosition();//custom function, implement it by //yourself
SharedPreferences sharedPref = this.getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putInt(MY_PAGER_TAG, pos);
editor.commit();
}
public void onResume(){
super.onResume();
SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
int pos = sharedPref.getInt(MY_PAGER_TAG,0);
setUpViewPagerOnPosition(pos);
}
I noticed that if I pressed the physical back button the ViewPager and RecyclerView were properly restored. So I wanted a way to set up button behavior same as onBackPressed(). Answer to which has already been posted in the question Make the “up” button behave like the “back” button on Android.
I made following changes in DetailActivity and my code started working just fine.
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == android.R.id.home) {
onBackPressed();
return true;
}
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
Related
I have a tab fragments app. The problem is when I go into an activity inside my app and want going back to my tabs layout it returns without the tabs row layout. I can see only the specific fragment page without the row above (the tab's row) that makes me able to navigate between the tabs.
Do you know what can I do to solve it? How can I see the tab's row too?
Thanks for any help,
This is the first tab that I want to see back from the activity:
public class Tab1MyProfile extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.tab1_my_profile, container, false);
return rootView;
}
}
This is the activity that contains code to go back to the fragment tab:
public class GameLive extends AppCompatActivity implements RecognitionListener {
private Intent intent;
private Button mStopButton;
public void stopGame (View view) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to finish the game?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
Tab1MyProfile fragment = new Tab1MyProfile();
fragmentTransaction.replace(android.R.id.content, fragment);
fragmentTransaction.commit();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.game_live);
mStopButton = (Button) findViewById(R.id.btnEndGame);
mStopButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
stopGame(view);
}
});
}
}
And this is the activity that contains all the tab's fragment:
public class StartActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
#TargetApi(Build.VERSION_CODES.M)
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_start);
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) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_start, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
Tab1MyProfile tab1=new Tab1MyProfile();
return tab1;
case 1:
Tab2StartGame tab2=new Tab2StartGame();
return tab2;
case 2:
Tab3StatsArea tab3=new Tab3StatsArea();
return tab3;
case 3:
Tab4Settings tab4=new Tab4Settings();
return tab4;
}
return null;
}
#Override
public int getCount() {
// Show 4 total pages.
return 4;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "My profile";
case 1:
return "Start Game";
case 2:
return "Stats Area";
case 3:
return "Settings";
}
return null;
}
}
}
Thank again!
What if you replace everything inside the onClick method of the DialogInterface.OnClickListener with GameLive.this.finish();. This will close the GameLive activity on click and return you to the previous activity, which should be the one that contains the missing navigation bar.
My fragment is not refreshing when I swipe back, so I want to know how I can refresh it when I swipe it back. I have seen many different answers online, but I don't why they don't work in my situation. It would be highly appreciated if someone could help me out, thanks.
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);
}
#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) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
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:
Profile tab1 = new Profile();
return tab1;
case 1:
Puzzles tab2 = new Puzzles();
return tab2;
default:
return null;
}
}
#Override
public int getCount() {
// Show 3 total pages.
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Profile";
case 1:
return "Puzzles";
}
return null;
}
}
}
I have tried setOffscreenPageLimit(0), detach attach fragment in onTabSelected, using FragmentStatePagerAdapter, notifyDataSetChanged(), and even
public int getItemPosition(Object object) {
return POSITION_NONE;
}
this doesn't work too. So I hope someone could help.
If you want to refresh the data in a particular Fragment, you have to do 2 things,
Store the updated data into Activity
Show the updated data in onResume() in that particular Fragment
If you want your data to be saved even after killing the app, store it in SharedPreference. Hope it helps!
On your fragment class add this.
#Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser) {
//Try adapter.notifyDataSetChanged or something like passing the new(updated) data to adapter from here.
}
}
Hope it helps.
I have 4 tabs in Fragment A.The first tab has a listview. I have attached a Navigation drawer switching between other 3 tabs, Fragment B, C and D. Now when I switch from Fragment A to Fragment B and back, the first tab doesn't show the listview. But when I switch from 3rd tab and come back to 1st tab it gets the listview data and loads it. What am I doing wrong? I have attached my MainActivity which has implemented navigation drawer and my HomeFragment which has four tabs.
MainActivity.java
public class MainActivity extends AppCompatActivity implements {
// index to identify current nav menu item
public static int navItemIndex = 0;
// tags used to attach the fragments
// toolbar titles respected to selected nav menu item
private String[] activityTitles;
// flag to load home fragment when user presses back key
private boolean shouldLoadHomeFragOnBackPress = true;
private Handler mHandler;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mDatabase1 = FirebaseDatabase.getInstance().getReference();
mHandler = new Handler();
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
navigationView = (NavigationView) findViewById(R.id.nav_view);
fab = (FloatingActionButton) findViewById(R.id.fab);
// Navigation view header
// load toolbar titles from string resources
activityTitles = getResources().getStringArray(R.array.nav_item_activity_titles);
// load nav menu header data
loadNavHeader();
// initializing navigation menu
setUpNavigationView();
if (savedInstanceState == null) {
navItemIndex = 0;
CURRENT_TAG = TAG_HOME;
loadHomeFragment();
}
}
/***
* Load navigation menu header information
* like background image, profile image
* name, website, notifications action view (dot)
*/
private void loadNavHeader() {
}
/***
* Returns respected fragment that user
* selected from navigation menu
*/
private void loadHomeFragment() {
// selecting appropriate nav menu item
selectNavMenu();
// set toolbar title
setToolbarTitle();
// if user select the current navigation menu again, don't do anything
// just close the navigation drawer
if (getSupportFragmentManager().findFragmentByTag(CURRENT_TAG) != null) {
drawer.closeDrawers();
// show or hide the fab button
toggleFab();
return;
}
// Sometimes, when fragment has huge data, screen seems hanging
// when switching between navigation menus
// So using runnable, the fragment is loaded with cross fade effect
// This effect can be seen in GMail app
Runnable mPendingRunnable = new Runnable() {
#Override
public void run() {
// update the main content by replacing fragments
Fragment fragment = getHomeFragment();
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.setCustomAnimations(android.R.anim.fade_in,
android.R.anim.fade_out);
fragmentTransaction.replace(R.id.frame, fragment, CURRENT_TAG);
fragmentTransaction.commitAllowingStateLoss();
}
};
// If mPendingRunnable is not null, then add to the message queue
if (mPendingRunnable != null) {
mHandler.post(mPendingRunnable);
}
// show or hide the fab button
toggleFab();
//Closing drawer on item click
drawer.closeDrawers();
// refresh toolbar menu
invalidateOptionsMenu();
}
private Fragment getHomeFragment() {
switch (navItemIndex) {
case 0:
// home
HomeFragment homeFragment = new HomeFragment();
return homeFragment;
case 1:
case 2:
case 3:
case 4:
default:
return new HomeFragment();
}
}
private void setToolbarTitle() {
getSupportActionBar().setTitle(activityTitles[navItemIndex]);
}
private void selectNavMenu() {
navigationView.getMenu().getItem(navItemIndex).setChecked(true);
}
private void setUpNavigationView() {
//Setting Navigation View Item Selected Listener to handle the item click of the navigation menu
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
// This method will trigger on item Click of navigation menu
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
//Check to see which item was being clicked and perform appropriate action
switch (menuItem.getItemId()) {
//Replacing the main content with ContentFragment Which is our Inbox View;
case R.id.nav_home:
navItemIndex = 0;
break;
case R.id.nav_live:
navItemIndex = 1;
break;
case R.id.nav_edit:
navItemIndex = 2;
break;
case R.id.nav_competitions:
navItemIndex = 3;
break;
case R.id.nav_settings:
navItemIndex = 4;
break;
case R.id.nav_about_us:
// launch new intent instead of loading fragment
startActivity(new Intent(MainActivity.this, CompetitionActivity.class));
drawer.closeDrawers();
return true;
case R.id.nav_report_bug:
// launch new intent instead of loading fragment
startActivity(new Intent(MainActivity.this, ReportBugActivity.class));
drawer.closeDrawers();
return true;
default:
navItemIndex = 0;
}
//Checking if the item is in checked state or not, if not make it in checked state
if (menuItem.isChecked()) {
menuItem.setChecked(false);
} else {
menuItem.setChecked(true);
}
menuItem.setChecked(true);
loadHomeFragment();
return true;
}
});
ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.openDrawer, R.string.closeDrawer) {
#Override
public void onDrawerClosed(View drawerView) {
// Code here will be triggered once the drawer closes as we dont want anything to happen so we leave this blank
super.onDrawerClosed(drawerView);
}
#Override
public void onDrawerOpened(View drawerView) {
// Code here will be triggered once the drawer open as we dont want anything to happen so we leave this blank
super.onDrawerOpened(drawerView);
}
};
//Setting the actionbarToggle to drawer layout
drawer.setDrawerListener(actionBarDrawerToggle);
//calling sync state is necessary or else your hamburger icon wont show up
actionBarDrawerToggle.syncState();
}
#Override
public void onBackPressed() {
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawers();
return;
}
// This code loads home fragment when back key is pressed
// when user is in other fragment than home
if (shouldLoadHomeFragOnBackPress) {
// checking if user is on other navigation menu
// rather than home
if (navItemIndex != 0) {
navItemIndex = 0;
CURRENT_TAG = TAG_HOME;
loadHomeFragment();
return;
}
}
new AlertDialog.Builder(this).setIcon(android.R.drawable.ic_dialog_alert).setTitle("Exit")
.setMessage("Are you sure?")
.setPositiveButton("yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finish();
}
}).setNegativeButton("no", null).show();
//System.exit(0);
//super.onBackPressed();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
// show menu only when home fragment is selected
if (navItemIndex == 0) {
getMenuInflater().inflate(R.menu.main, menu);
}
// when fragment is notifications, load the menu created for notifications
if (navItemIndex == 3) {
getMenuInflater().inflate(R.menu.notifications, menu);
}
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_logout) {
auth = FirebaseAuth.getInstance();
auth.signOut();
startActivity(new Intent(MainActivity.this, LoginActivity.class));
return true;
}
return super.onOptionsItemSelected(item);
}
// show or hide the fab
private void toggleFab() {
if (navItemIndex == 0)
fab.show();
else
fab.hide();
}
#Override
public void onFragmentInteraction(Uri uri) {
}
private int dpToPx(int dp)
{
float density = getApplication().getResources().getDisplayMetrics().density;
return Math.round((float)dp * density);
}
#Override
public void setActionBarTitle(String home) {
}`**
HomeFragment.java
public class HomeFragment extends android.support.v4.app.Fragment {
private AppCompatActivity aca=new AppCompatActivity();
//private class Act extends AppCompatActivity {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
//tabs
private String[] mPlanetTitles;
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
private int[] tabIcons = {
R.drawable.ic_question_answer_black_24dp,
R.drawable.ic_notifications_black_24dp,
R.drawable.ic_people_black_24dp,
R.drawable.ic_face_black_24dp,
};
private OnFragmentInteractionListener mListener;
private LayoutInflater inflator;
public ViewGroup container;
private Bundle savedInstancesState;
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* #param param1 Parameter 1.
* #param param2 Parameter 2.
* #return A new instance of fragment HomeFragment.
*/
// TODO: Rename and change types and number of parameters
public HomeFragment newInstance(String param1, String param2) {
HomeFragment fragment = new HomeFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
}
public HomeFragment() {
// Required empty public constructor
}
LayoutInflater inflater;
#Override
public void onCreate(Bundle savedInstanceState) {
setRetainInstance(true);
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Context context=getContext();
inflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
View v=inflater.inflate(R.layout.fragment_home, container, false);
viewPager = (ViewPager) v.findViewById(R.id.viewpager);
//viewPager.setOffscreenPageLimit(3);
setupViewPager(viewPager);
tabLayout = (TabLayout) v.findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
setupTabIcons();
return v;
}
private void setupTabIcons() {
tabLayout.getTabAt(0).setIcon(tabIcons[0]);
tabLayout.getTabAt(1).setIcon(tabIcons[1]);
tabLayout.getTabAt(2).setIcon(tabIcons[2]);
tabLayout.getTabAt(3).setIcon(tabIcons[3]);
ColorStateList colors;
colors = getResources().getColorStateList(R.color.tab_icon);
for (int i = 0; i < tabLayout.getTabCount(); i++) {
TabLayout.Tab tab = tabLayout.getTabAt(i);
Drawable icon = tab.getIcon();
if (icon != null) {
icon = DrawableCompat.wrap(icon);
DrawableCompat.setTintList(icon, colors);
}
}
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
#Override
public void onDestroyView(){
super.onDestroyView();
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter((getActivity()).getSupportFragmentManager());
adapter.addFrag();
adapter.addFrag();
adapter.addFrag();
adapter.addFrag();
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<android.support.v4.app.Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public android.support.v4.app.Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFrag(android.support.v4.app.Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
//return mFragmentTitleList.get(position);
return null;
}
}
public void setActionBarTitle(String title) {
aca.getSupportActionBar().setTitle(title);
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
/**
* This interface must be implemented by activities that contain this
* fragment to allow an interaction in this fragment to be communicated
* to the activity and potentially other fragments contained in that
* activity.
* <p/>
* See the Android Training lesson <a href=
* "http://developer.android.com/training/basics/fragments/communicating.html"
* >Communicating with Other Fragments</a> for more information.
*/
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
public void onFragmentInteraction(Uri uri);
void setActionBarTitle(String home);
}
}
I have tab layout in android with viewpager in my Main Activity. I have three Tab with three Fragment. And in first fragment i have button i want to intent on second tab from that button on click. how to intent please help me.
Here is my Code
public class MainActivity extends AppCompatActivity {
//Declaring All The Variables Needed
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
private ViewPagerAdapter viewPagerAdapter;
public static final String PREFS_NAME = "MyPrefsFile";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SharedPreferences settings = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
String name = settings.getString("first", "str1");
//str1 = intent.getStringExtra("first");
Toast.makeText(MainActivity.this, "" + name, Toast.LENGTH_SHORT).show();
toolbar = (Toolbar) findViewById(R.id.toolbar);
tabLayout = (TabLayout) findViewById(R.id.tabs);
viewPager = (ViewPager) findViewById(R.id.viewpager);
FragmentManager manager = getSupportFragmentManager();
ViewPagerAdapter adapter = new ViewPagerAdapter(manager);
viewPager.setAdapter(adapter);
tabLayout.setupWithViewPager(viewPager);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setTabsFromPagerAdapter(adapter);
tabLayout.setTabTextColors(ContextCompat.getColorStateList(this, R.drawable.tab_selector));
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
setSupportActionBar(toolbar);
final FloatingActionMenu floatingActionsMenu=(FloatingActionMenu) findViewById(R.id.material_design_android_floating_action_menu);
final FloatingActionButton floatingActionButton1=(FloatingActionButton)findViewById(R.id.material_design_floating_action_menu_item1);
floatingActionButton1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Table", Toast.LENGTH_SHORT).show();
viewPager.setCurrentItem(0);
floatingActionsMenu.close(true);
}
});
FloatingActionButton floatingActionButton2=(FloatingActionButton)findViewById(R.id.material_design_floating_action_menu_item2);
floatingActionButton2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Order", Toast.LENGTH_SHORT).show();
viewPager.setCurrentItem(1);
floatingActionsMenu.close(true);
}
});
FloatingActionButton floatingActionButton3=(FloatingActionButton)findViewById(R.id.material_design_floating_action_menu_item3);
floatingActionButton3.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Logout", Toast.LENGTH_SHORT).show();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
Intent tologin=new Intent(MainActivity.this,LoginPage.class);
startActivity(tologin);
return true;
}
return super.onOptionsItemSelected(item);
}
}
All the fragments are within the same ViewPager and you just want to go one to another fragment you can do like this...
The view pager is in Activity but the Button is inside Fragment so you need to do this create this method inside your activity
public void navigateFragment(int position){
viewPager.setCurrentItem(position, true);
}
and call inside your OnClickListener method of fragment:
((MainActivity)getActivity()).navigateFragment(POSITION_YOU_WANNA_SELECT);
Hope this will help you.
Recommended approach : you can implement a listener in second fragment and create reference in first fragment.
after onclick of a button from 1st fragment call method of listener which is defined in second fragment.
Second approach : you can maintain a static data from 1st fragment and on click just load 2nd fragment and access that static data.
In Android if I start new Activity B from within activity A, Android will automatically save all the state of Activity A. So when I click back button on the device in Activity B, A will be restored to the state when I had started Activity B (for example: Spinners, ListView and Toggle Buttons all are in their previous positions).
BUT when I click the back button in action bar activity A starts fresh with no stored state.
Is there any way to make this back button similar to the device's back or I have to use SharedPreferences and store every thing myself?
(api 8 and above for my app)
In one of the fragments in my app I have a ListView which is one of the fragments that needs to be in the same state when coming back from the next page. I have added the code below.
If any other part is needed please tell me and I will add the code.
The main activity code:
private ProgressDialog progress;
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a {#link FragmentPagerAdapter}
* derivative, which will keep every loaded fragment in memory. If this
* becomes too memory intensive, it may be best to switch to a
* {#link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle(Farsi.Convert(getString(R.string.app_name_farsi)));
setContentView(R.layout.activity_main);
final ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Create the adapter that will return a fragment for each of the three primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// When swiping between different sections, select the corresponding tab. We can also use ActionBar.Tab#select() to do this if we have a reference to the Tab.
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by the adapter. Also specify this Activity object, which implements the TabListener interface, as the callback (listener) for when this tab is selected.
actionBar.addTab(actionBar.newTab().setText(mSectionsPagerAdapter.getPageTitle(i)).setTabListener(this));
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will automatically handle clicks on the Home/Up button, so long as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
Intent intent=new Intent(MainActivity.this, AboutActivity.class);
startActivity(intent);
}
return super.onOptionsItemSelected(item);
}
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
Here is the code to my List Fragment:
public class SearchResultListFragment extends Fragment{
Pagination pagination;
boolean loadingMore = false;
ListView list;
TextView text1;
TextView text2;
TextView text3;
TextView text4;
TextView text5;
Button Btngetdata;
private static String url = "https://www.....com/api/property/search";
private static int currentFirstVisibleItem;
public SearchResultArrayListAdaptor adapter ;
LinearLayout linlaHeaderProgress;
JSONArray jsonArray = null;
JSONParse fetchclass = null;
public SearchResultListFragment() {
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
linlaHeaderProgress = (LinearLayout) getActivity().findViewById(R.id.linlaHeaderProgress);
ArrayAdapter<PropertyObject> aa =(ArrayAdapter<PropertyObject>) list.getAdapter();
if (aa!= null){
aa.clear();
aa.notifyDataSetChanged();
}
list.setOnItemClickListener((OnItemClickListener) getActivity());
adapter = new SearchResultArrayListAdaptor(getActivity(), R.layout.list_view_items, new ArrayList<PropertyObject>());
list.setAdapter(adapter);
pagination = new Pagination(0,15);
fetchclass = new JSONParse(getActivity());
fetchclass.execute(url);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_search_result_list, container, false);
list=(ListView)rootView.findViewById(R.id.listViewSearchResult);
list.setOnScrollListener(
new OnScrollListener(){
private int currentVisibleItemCount;
private int currentTotalItemCount;
private int currentScrollState;
#Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
this.currentScrollState = scrollState;
this.isScrollCompleted();
}
private void isScrollCompleted() {
if (currentFirstVisibleItem + currentVisibleItemCount >= currentTotalItemCount) {
if (this.currentVisibleItemCount > 0 && this.currentScrollState == SCROLL_STATE_IDLE) {
if(fetchclass!=null) {
pagination = new Pagination(this.currentTotalItemCount,15);
if(!(fetchclass.getStatus()== AsyncTask.Status.RUNNING)) {
fetchclass= new JSONParse(getActivity());
fetchclass.execute(url);
}
}
else {
fetchclass = new JSONParse(getActivity());
fetchclass.execute(url);
}
}
}
}
#Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
currentFirstVisibleItem = firstVisibleItem;
this.currentVisibleItemCount = visibleItemCount;
this.currentTotalItemCount = totalItemCount;
}
});
return rootView;
}
//*********************************** inner class
public class JSONParse extends AsyncTask<String, String, JSONObject> {
Context mContext;
int checkBoxRooms;
public JSONParse(Context context){
mContext = context;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
linlaHeaderProgress.setVisibility(View.VISIBLE);
}
#Override
protected JSONObject doInBackground(String... args) {
JSONObject json = null;
PropertyFilter searchFilter = SearchFilterManager.initializePropertyFilter(new PropertyFilter(), getArguments());
getActivity().setProgressBarIndeterminateVisibility(true);
JSONParserForSearch jParser = new JSONParserForSearch();
json = jParser.getJSONFromUrl(url, searchFilter, pagination);
return json;
}
#Override
protected void onPostExecute(JSONObject json) {
// SHOW THE SPINNER WHILE LOADING FEEDS
getActivity().setProgressBarIndeterminateVisibility(false);
PropertyObject propertyObject;
try {
jsonArray = json.getJSONArray("PropertyListings");
if (jsonArray == null || jsonArray.length()<1){
// list.setEmptyView(getActivity().findViewById(R.id.txtNoResult));
}
else {
for(int i = 0; i < jsonArray.length(); i++){
JSONObject c = jsonArray.getJSONObject(i);
propertyObject = new Gson().fromJson(c.toString(), new PropertyObject().getClass());
adapter.add(propertyObject);
adapter.notifyDataSetChanged();
}
}
// CHANGE THE LOADINGMORE STATUS TO PERMIT FETCHING MORE DATA
loadingMore = false;
// HIDE THE SPINNER AFTER LOADING FEEDS
linlaHeaderProgress.setVisibility(View.GONE);
}
catch (JSONException e) {
e.printStackTrace();
}
catch (Exception e) {
e.printStackTrace();
}
}
}
}
My layout XML:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
<ListView
android:id="#+id/listViewSearchResult"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_weight="2"
>
</ListView>
<LinearLayout
android:id="#+id/linlaHeaderProgress"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical"
android:visibility="gone"
>
My Adapter is ArrayAdapter.
I have implemented isEmpty and getCount too.
My Activity For List:
public class SearchResultListActivity extends ActionBarActivity implements OnItemClickListener{
static PropertyObject selectedPropertyObject;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
Bundle bundle=new Bundle();
bundle.putInt("intentionOfOwner", intent.getIntExtra("intentionOfOwner",0));
SearchResultListFragment fragobj=new SearchResultListFragment();
fragobj.setArguments(bundle);
///back button
setContentView(R.layout.activity_search_result_list);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction().add(R.id.container, fragobj).commit();
}
}
#Override
public void onItemClick(AdapterView<?> arg0, View textView, int rowNumber, long arg3) {
Intent intent = new Intent(this, PropertyDetailActivity.class);
PropertyObject po = (PropertyObject) arg0.getAdapter().getItem((int)arg3);
intent.putExtra("listingID",po.getID());
startActivity(intent);
}
EDIT:
All right. I changed my API level from 8 to 11 to.
Also I added getActionBar().setDisplayHomeAsUpEnabled(true); to onCreate() of activity.
And changes the onOptionsItemSelected as follows.
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_settings:
Intent intent=new Intent(PropertyDetailActivity.this, AboutActivity.class);
startActivity(intent);
return true;
case R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
case R.id.up:
NavUtils.navigateUpFromSameTask(this);
return true;
case R.id.homeAsUp:
NavUtils.navigateUpFromSameTask(this);
return true;
default:
break;
}
return super.onOptionsItemSelected(item);
BUT none of the switch cases gets the chance to run when I click the back button in the action bar!