I'm trying to make an application with multiple Tabs. For each tab I'm using different fragments. And when I leaf through tabs the information in them is changing.
How can I save the state of each tab when swiping?
Code for example:
MainActivity.java:
package com.tabs.example;
import java.util.Locale;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.PagerTabStrip;
import android.support.v4.view.ViewPager;
public class MainActivity extends FragmentActivity {
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
PagerTabStrip pagerTabStrip = (PagerTabStrip) findViewById(R.id.pager_tab_strip);
pagerTabStrip.setBackgroundColor(Color.BLACK);
pagerTabStrip.setTabIndicatorColor(Color.CYAN);
pagerTabStrip.setTextColor(Color.WHITE);
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
Fragment fragment;
switch (position) {
case 0:
fragment = new Fragment1();
break;
case 1:
fragment = new Fragment2();
break;
case 2:
fragment = new Fragment3();
break;
default:
fragment = null;
break;
}
return fragment;
}
#Override
public int getCount() {
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
case 2:
return getString(R.string.title_section3).toUpperCase(l);
}
return null;
}
}
}
Fragment1.java:
package com.tabs.example;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Fragment1 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.fragment1, container, false);
DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
Date date = new Date();
String time = dateFormat.format(date);
TextView tv1 = (TextView) root.findViewById(R.id.tv1);
tv1.setText(time);
return root;
}
}
Fragment2.java:
package com.tabs.example;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Fragment2 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.fragment2, container, false);
DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
Date date = new Date();
String time = dateFormat.format(date);
TextView tv2 = (TextView) root.findViewById(R.id.tv2);
tv2.setText(time);
return root;
}
}
Fragment3.java:
package com.tabs.example;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Fragment3 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.fragment3, container, false);
DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
Date date = new Date();
String time = dateFormat.format(date);
TextView tv3 = (TextView) root.findViewById(R.id.tv3);
tv1.setText(time);
return root;
}
}
You can cache them all by setting the ViewPagerAdapter like this:
mViewPager.setOffscreenPageLimit(3);
Related
Good day,
I am trying to display RecyclerView in the fragment of the app. But every time I run the app it crashes. As I understand there is a problem that teamList is on MainActivity and I need to take everything related to teamList to onCreate method at KomandosFragment. But every time I try to do it it just does not work.
Any help would be appreciated.
EDIT: Full code in GitHub https://github.com/Kirkoglu/Meginimas
Main Activity:
package com.anzelmasfile.meginimas;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.viewpager2.widget.ViewPager2;
import android.os.Bundle;
import com.google.android.material.badge.BadgeDrawable;
import com.google.android.material.tabs.TabLayout;
import com.google.android.material.tabs.TabLayoutMediator;
public class MainActivity extends AppCompatActivity {
RecyclerView teamList;
String s1[], s2[];
int images[] = {R.drawable.gargzdai, R.drawable.jonava, R.drawable.joniskis, R.drawable.kaunas,
R.drawable.klaipeda, R.drawable.marijampole, R.drawable.mazeikiai, R.drawable.moletai,
R.drawable.palanga, R.drawable.sakiai, R.drawable.silale, R.drawable.silute,
R.drawable.taurage, R.drawable.telsiai, R.drawable.vilnius};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//
// teamList = findViewById(R.id.teamList);
// s1 = getResources().getStringArray(R.array.komandos);
// s2 = getResources().getStringArray(R.array.treneriai);
//
// KomandosAdapter komandosAdapter = new KomandosAdapter(this, s1, s2, images);
//
// teamList.setAdapter(komandosAdapter);
// teamList.setLayoutManager(new LinearLayoutManager(this));
ViewPager2 viewPager2 = findViewById(R.id.viewPager);
viewPager2.setAdapter(new OrdersPagerAdapter(this));
final TabLayout tabLayout = findViewById(R.id.tabLayout);
TabLayoutMediator tabLayoutMediator = new TabLayoutMediator(tabLayout, viewPager2, new TabLayoutMediator.TabConfigurationStrategy() {
#Override
public void onConfigureTab(#NonNull TabLayout.Tab tab, int position) {
switch (position) {
case 0: {
tab.setText("Pradinis");
tab.setIcon(R.drawable.pradinis);
break;
}
case 1: {
tab.setText("Komandos");
tab.setIcon(R.drawable.komandos);
break;
}
case 2: {
tab.setText("Tvarkaraštis");
tab.setIcon(R.drawable.tvarkarastis);
break;
}
case 3: {
tab.setText("Rezultatai");
tab.setIcon(R.drawable.rezultatai);
break;
}
case 4: {
tab.setText("Lentelė");
tab.setIcon(R.drawable.lentele);
break;
}
}
}
});
tabLayoutMediator.attach();
}
}
KomandosAdapter:
package com.anzelmasfile.meginimas;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
public class KomandosAdapter extends RecyclerView.Adapter<KomandosAdapter.KomandosViewHolder> {
String data1[], data2[];
int images[];
Context context;
public KomandosAdapter(Context ct, String s1[], String s2[], int img[]) {
context = ct;
data1 = s1;
data2 = s2;
images = img;
}
#NonNull
#Override
public KomandosViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(context);
View view = inflater.inflate(R.layout.item_komandos, parent, false);
return new KomandosViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull KomandosViewHolder holder, int position) {
holder.myText1.setText(data1[position]);
holder.myText2.setText(data2[position]);
holder.myImage.setImageResource(images[position]);
}
#Override
public int getItemCount() {
return 15;
}
public static class KomandosViewHolder extends RecyclerView.ViewHolder {
TextView myText1, myText2;
ImageView myImage;
KomandosViewHolder(#NonNull View itemView) {
super(itemView);
myText1 = itemView.findViewById(R.id.teamName);
myText2 = itemView.findViewById(R.id.teamCoach);
myImage = itemView.findViewById(R.id.teamLogo);
}
}
}
KomandosFragment:
package com.anzelmasfile.meginimas;
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* A simple {#link Fragment} subclass.
*/
public class KomandosFragment extends Fragment {
public KomandosFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_komandos, container, false);
}
}
I have a tabbed activity with 2 fragments. I'm trying to transmit a string from the first fragment to the second fragment but I'm getting NULL POINTER EXCEPTION.
Here is the MainActivity.java:
package com.example.myapplication;
import android.os.Bundle;
import com.google.android.material.tabs.TabLayout;
import androidx.fragment.app.FragmentTransaction;
import androidx.viewpager.widget.ViewPager;
import androidx.appcompat.app.AppCompatActivity;
import com.example.myapplication.ui.main.SectionsPagerAdapter;
public class MainActivity extends AppCompatActivity implements Frag1.Exchange {
private static final String TAG = "MainActivity";
private SectionsPagerAdapter sectionsPagerAdapter;
private ViewPager viewPager;
private TabLayout tabLayout;
private void setupViewPager(ViewPager viewPager){
SectionsPagerAdapter sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
sectionsPagerAdapter.addFragment(new Frag1(), "FirstTab");
sectionsPagerAdapter.addFragment(new Frag2(), "SecondTab");
viewPager.setAdapter(sectionsPagerAdapter);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
viewPager = (ViewPager) findViewById(R.id.view_pager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
}
#Override
public void stringExchange(String s) {
Frag2 frag2 = (Frag2) getSupportFragmentManager().findFragmentByTag("SecondTab");
frag2.displayExchange(s);
}
}
Here is SectionsPagerAdapter.java
package com.example.myapplication.ui.main;
import android.content.Context;
import androidx.annotation.Nullable;
import androidx.annotation.StringRes;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentPagerAdapter;
import com.example.myapplication.R;
import java.util.ArrayList;
import java.util.List;
/**
* A [FragmentPagerAdapter] that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> fragmentList = new ArrayList<>();
private final List<String> stringList = new ArrayList<>();
public void addFragment(Fragment fragment, String title){
fragmentList.add(fragment);
stringList.add(title);
}
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a (defined as a static inner class below).
return fragmentList.get(position);
}
#Nullable
#Override
public CharSequence getPageTitle(int position) {
return stringList.get(position);
}
#Override
public int getCount() {
// Show 2 total pages.
return fragmentList.size();
}
}
Here is Frag1.java:
package com.example.myapplication;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentTransaction;
public class Frag1 extends Fragment{
private static final String TAG = "FirstTab";
private Button transfer;
private Exchange ex;
public interface Exchange{
public void stringExchange(String s);
}
#Nullable
#Override
public View onCreateView(#NonNull final LayoutInflater inflater, #Nullable final ViewGroup container, #Nullable Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.tab1_fragment, container, false);
transfer = (Button) view.findViewById(R.id.button2);
ex = (Exchange) getActivity();
transfer.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String s = "Test";
ex.stringExchange(s);
}
});
return view;
}
}
With its xlm tab1_fragment.xlm:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp"
android:id="#+id/tab1"
>
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/transfer"
android:layout_centerInParent="true"/>
</RelativeLayout>
And finally here is the Frag2.java:
package com.example.myapplication;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import java.util.ArrayList;
public class Frag2 extends Fragment {
private static final String TAG = "SecondTab";
private ListView listView;
private ArrayList<String> arrayList = new ArrayList<>();
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.tab2_fragment, container, false);
listView = (ListView) view.findViewById(R.id.list_view);
ArrayAdapter arrayAdapter = new ArrayAdapter(getContext(),android.R.layout.simple_list_item_1,arrayList);
listView.setAdapter(arrayAdapter);
return view;
}
public void displayExchange(String s){
arrayList.add(s);
}
}
I think the problem is in MainActivity when I call findFragmentByTag("SecondTab") because it's tag is not set to SecondTab but i don't know how to set it.
Any help will be apreciated!
Use ViewModel to share data between fragments. Refer: https://developer.android.com/topic/libraries/architecture/viewmodel.html#sharing
I have problem in my code
error is
incompatible types: DetailOneFragment cannot be converted to Fragment
in Android
incompatible types: DetailTwoFragment cannot be converted to Fragment
in Android
Which is wrong?
this is DetailActivity.java
import android.content.Intnet;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.TabLayout;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import org.adnroidtown.albaplanet.R;
import org.adnroidtown.albaplanet.review_view.Review1Activity;
public class DetailActivity extends AppCompatActivity {
ViewPager pager;
TabLayout tabLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detail);
//메인 액티비티에서 넘겨받은 인텐트 -시작-
ImageView iv = (ImageView) findViewById(R.id.detail_img);
TextView tvName = (TextView) findViewById(R.id.detail_store);
Intent intent = getIntent();
iv.setImageResource(intent.getIntExtra("img", 0));
tvName.setText(intent.getStringExtra("name"));
pager = (ViewPager) findViewById(R.id.detail_viewpager);
tabLayout = (TabLayout) findViewById(R.id.tab_layout);
FragmentManager manager = getSupportFragmentManager();
PagerAdapter adapter = new PagerAdapter(manager);
pager.setAdapter(adapter);
tabLayout.setupWithViewPager(pager);
// mTabLayout.setupWithViewPager(mPager1);
pager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setTabsFromPagerAdapter(adapter);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {#Override
public void onClick(View view) {
Intent intent = new Intent(DetailActivity.this, Review1Activity.class);
startActivity(intent);
}
});
}
}
this is PagerAdapter.java
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
public class PagerAdapter extends FragmentStatePagerAdapter {
public PagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
Fragment frag = null;
switch (position) {
case 0:
frag = new DetailOneFragment();
break;
case 1:
frag = new DetailTwoFragment();
break;
}
return frag;
}
#Override
public int getCount() {
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
String title = " ";
switch (position) {
case 0:
title = "Game";
break;
case 1:
title = "Movie";
break;
}
return title;
}
}
this is DetailOneFragment.java
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import org.adnroidtown.albaplanet.R;
public class DetailOneFragment extends Fragment {
public DetailOneFragment(){
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_detail_one, container, false);
}
}
This is error ScreenShot
See your screenshot. You Import/extend android.app.Fragment;in DetailOneFragment and use android.app.support...Fragment in your other class
replace
import android.app.Fragment;
with
import android.support.v4.app.Fragment;
in your fragments
As of 02-2021 the solution above did work for me but i had to replace :
import android.app.Fragment;
with
import androidx.fragment.app.Fragment;
instead
My app has the main activity with a Navigation Drawer, that allow the application to navigate between Fragments. Each item list of the navigation drawer shows a fragment.
In one of those Fragment I want a ViewPager, and here is where I got stuck. If I'm not wrong, this is a Fragment inside another Fragment (Nested Fragments) but I can't make this work.
This is the code of the fragment that contains the ViewPager
Seccion1.java
import android.app.Fragment;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
public class Seccion1 extends Fragment {
ViewPager vp;
private List<android.support.v4.app.Fragment> getFragments(){
List<android.support.v4.app.Fragment> list = new ArrayList<android.support.v4.app.Fragment>();
list.add(ModelFragment.newInstance("Hola como andas", "descriociones"));
list.add(ModelFragment.newInstance("0895452125x", "#FFFFEF59"));
list.add(ModelFragment.newInstance("22 Mart", "#FF9C63FF"));
list.add(ModelFragment.newInstance("Sak", "#72a83b"));
list.add(ModelFragment.newInstance("Android Studio", "#a83b97"));
return list;
}
//#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.seccion1, container, false);
vp = (ViewPager)rootView.findViewById(R.id.vp);
//vp.setPageTransformer(true, new RotateDownTransformer());
ControllerFragment cf = new ControllerFragment(getChildFragmentManager(), getFragments());
vp.setAdapter(cf);
return rootView;
}
}
I don't know how to fix this line:
ControllerFragment cf = new ControllerFragment(getChildFragmentManager(), getFragments());
Here the ControllerFragment code
ControllerFragment.java
import android.content.Context;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.widget.RelativeLayout;
import android.widget.TextView;
import java.util.List;
public class ControllerFragment extends FragmentPagerAdapter {
List<Fragment> fragments;
Context context;
public ControllerFragment(FragmentManager fm, List<Fragment> fragments){
super(fm);
this.fragments = fragments;
}
public Fragment getItem(int position){
return fragments.get(position);
}
public int getCount(){
return fragments.size();
}
public Object instantiateItem(View view, int position){
RelativeLayout relativeLayout = (RelativeLayout)view.inflate(context, R.layout.custom_fragment, null);
TextView tv_text = (TextView)relativeLayout.findViewById(R.id.tv_text);
TextView tv_description = (TextView)relativeLayout.findViewById(R.id.tv_description);
((ViewPager) view).addView(relativeLayout);
return relativeLayout;
}
}
Change this
import android.app.Fragment;
to
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
I want to create a sign up form where the form has been divided into three fragments.There is a next button in the fragment which causes the viewpager to move to the next fragment.But i want to pass values between the fragments how do i do that?
The main class:
package pl.looksok.viewpagerdemo;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
public class MainActivity extends FragmentActivity {
ViewPager pager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
MyPagerAdapter pageAdapter = new MyPagerAdapter(getSupportFragmentManager());
pager = (ViewPager)findViewById(R.id.myViewPager);
pager.setAdapter(pageAdapter);
}
public void selectFragment(int position){
pager.setCurrentItem(position, true);
// true is to animate the transaction
}
}
The first fragment:
package pl.looksok.viewpagerdemo;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
public class FragmentBlue extends Fragment {
Button btnnext1;
RelativeLayout frag1;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_blue, container, false);
btnnext1=(Button) view.findViewById(R.id.btnnext1);
frag1=(RelativeLayout) view.findViewById(R.id.frag1);
btnnext1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
((MainActivity)getActivity()).selectFragment(1);
}
});
return view;
}
}
The second fragment:
package pl.looksok.viewpagerdemo;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
public class FragmentGreen extends Fragment {
Button btnnext2;
RelativeLayout frag2;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_green, container, false);
btnnext2=(Button) view.findViewById(R.id.btnnext2);
frag2=(RelativeLayout) view.findViewById(R.id.frag2);
btnnext2.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
((MainActivity)getActivity()).selectFragment(2);
}
});
return view;
}
}
The third fragment:
package pl.looksok.viewpagerdemo;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.support.v4.app.Fragment;
public class FragmentPink extends Fragment {
Button btnnext3;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_pink, container, false);
btnnext3=(Button) view.findViewById(R.id.btnnext3);
btnnext3.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
}
});
return view;
}
}
I would place a submit button in the last fragment which would post data to the server,So the data in the first two fragments should be available in the last fragment.So i want to know how to pass data from the first two fragments to the last one?
Also is my approach a bad way of achieving the task?Would i be better of creating three different activities and using intent and bundle to pass data?
You can use SharedPreferences. Before you change the fragment save entered values:
SharedPreferences sp = getSharedPreferences("pref_name", MODE_PRIVATE);
SharedPreferences.Editor editor = mSharedPref.edit();
editor.putString("key", value);
editor.commit();
And in other fragment when you want to use saved value:
SharedPreferences sp = getSharedPreferences(MainActivity.PREF_NAME, MODE_PRIVATE);
String value = mSharedPref.getString("key", null);
if(value !=null){
//do something with value
}
Another approach is using interface-callback pattern. You can read more here.