I need to pass the String data to tab layout. i'm already pass the data from adapter to fragments in Tab layout. But my problem is I cannot to pass that data from activity to Adapter java class. I need to pass the data to more than one fragment. how can i do this?
Main Activity Code
package com.example.tablay;
import androidx.appcompat.app.AppCompatActivity;
import androidx.viewpager.widget.ViewPager;
import android.content.Intent;
import android.os.Bundle;
import android.provider.ContactsContract;
import com.google.android.material.tabs.TabLayout;
import java.util.List;
import java.util.Stack;
public class MainActivity extends AppCompatActivity {
private ViewPager pager;
private TabLayout tabs;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pager=(ViewPager) findViewById(R.id.pager);
tabs=(TabLayout) findViewById(R.id.tabs);
pager.setAdapter(new TabFragmentPagerAdapter(getSupportFragmentManager()));
tabs.setupWithViewPager(pager);
tabs.setTabGravity(TabLayout.GRAVITY_FILL);
}
}
Page Adapter Code :
package com.example.tablay;
import android.os.Bundle;
import android.provider.ContactsContract;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentPagerAdapter;
import java.util.Date;
import java.util.List;
public class TabFragmentPagerAdapter extends FragmentPagerAdapter {
String[] title = new String[]{
"Tab 1", "Tab 2", "Tab 3"
};
public TabFragmentPagerAdapter(#NonNull FragmentManager fm) {
super(fm);
}
#NonNull
#Override
public Fragment getItem(int position) {
Fragment fragment=null;
switch (position){
case 0:
tab1Fragment tab1Fragment=new tab1Fragment();
Bundle bundle = new Bundle();
bundle.putString("edttext", "data From Activity");
tab1Fragment.setArguments(bundle);
return tab1Fragment;
case 1:
tab2Fragment tab2Fragment=new tab2Fragment();
bundle = new Bundle();
bundle.putString("edttext1", "data From Activity1");
tab2Fragment.setArguments(bundle);
return tab2Fragment;
case 2:
tab3Fragment tab3Fragment=new tab3Fragment();
return tab3Fragment;
default:
fragment=null;
break;
}
return fragment;
}
#Nullable
#Override
public CharSequence getPageTitle(int position) {
return title[position];
}
#Override
public int getCount() {
return title.length;
}
}
Fragment Code:
package com.example.tablay;
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class tab1Fragment extends Fragment {
public tab1Fragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_tab1, container, false);
TextView tes=(TextView) view.findViewById(R.id.testtab1);
String strtext = getArguments().getString("edttext");
tes.setText(strtext);
return view;
}
}
I need to pass the String data to tab layout. i'm already pass the data from adapter to fragments in Tab layout. But my problem is I cannot to pass that data from activity to Adapter java class. I need to pass the data to more than one fragment. how can i do this?
You can pass data from activity to the adapter by constructor like this :
public class MainActivity extends AppCompatActivity {
private ViewPager pager;
private TabLayout tabs;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pager=(ViewPager) findViewById(R.id.pager);
tabs=(TabLayout) findViewById(R.id.tabs);
pager.setAdapter(new TabFragmentPagerAdapter(getSupportFragmentManager(),ActivityStringData));
tabs.setupWithViewPager(pager);
tabs.setTabGravity(TabLayout.GRAVITY_FILL);
}
to
public class TabFragmentPagerAdapter extends FragmentPagerAdapter {
String[] title = new String[]{
"Tab 1", "Tab 2", "Tab 3"
};
String data=null;
public TabFragmentPagerAdapter(#NonNull FragmentManager fm,String activityData) {
super(fm);
this.data=activityData
}
#NonNull
#Override
public Fragment getItem(int position) {
Fragment fragment=null;
switch (position){
case 0:
tab1Fragment tab1Fragment=new tab1Fragment();
Bundle bundle = new Bundle();
bundle.putString("edttext", "data From Activity");
tab1Fragment.setArguments(bundle);
return tab1Fragment;
case 1:
tab2Fragment tab2Fragment=new tab2Fragment();
bundle = new Bundle();
bundle.putString("edttext1", "data From Activity1");
tab2Fragment.setArguments(bundle);
return tab2Fragment;
case 2:
tab3Fragment tab3Fragment=new tab3Fragment();
return tab3Fragment;
default:
fragment=null;
break;
}
return fragment;
}
#Nullable
#Override
public CharSequence getPageTitle(int position) {
return title[position];
}
#Override
public int getCount() {
return title.length;
}
}
Related
I have a Fragment pager adapter with five fragments and inside the third fragment I want to call an other activity which sends a selected picture to the container. It works fine but, every time the picture is selected from the other activity and the pager adapter starts from the first fragment in the fragment-activity instead of third fragment-activity. Do I have to force the pager adapter from the other activity or should I change something in the fragment-activity?
Code:
Fragment-activity:
package com.example.android.womb_the_game;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import androidx.fragment.app.FragmentActivity;
import androidx.fragment.app.FragmentPagerAdapter;
import androidx.viewpager.widget.ViewPager;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import com.google.android.material.tabs.TabLayout;
public class Circulation extends FragmentActivity {
ViewPager vp;
public static FragmentPagerAdapter adapterViewPager;
#Override
protected void onCreate(Bundle onSavedInstanceState) {
super.onCreate(onSavedInstanceState);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_circulation);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
vp = findViewById(R.id.view_pager);
adapterViewPager=new Adapter_Circulation(getSupportFragmentManager(), this);
vp.setAdapter(adapterViewPager);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.setupWithViewPager(vp);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
}
FragmentPagerAdapter:
package com.example.android.womb_the_game;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentPagerAdapter;
import android.content.Context;
public class Adapter_Circulation extends FragmentPagerAdapter {
private static int NUM_ITEMS = 5;
Context context;
public Adapter_Circulation(FragmentManager fm, Context c) {
super(fm);
this.context = c;
}
#Override
public Fragment getItem(int position) {
switch (position)
{
case 0:
return Frg0.newInstance ();
case 1:
return Frg1.newInstance();
case 2:
return Frg2.newInstance();
case 3:
return Frg3.newInstance();
case 4:
return Frg4.newInstance();
}
return null; //does not happen
}
#Override
public int getCount() {
return NUM_ITEMS; //three fragments
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "RULES";
case 1:
return "EVENTS";
case 2:
return "PLAN";
case 3:
return "SHOOT";
case 4:
return "JUMP";
}
return null;
}
}
Fragment3:
package com.example.android.womb_the_game;
import android.os.Bundle;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageButton;
public class Frg3 extends Fragment{
private ImageButton shoot;
private ImageButton snipe;
private ImageButton aim;
public static Frg3 newInstance() {
Bundle args = new Bundle();
Frg3 fragment = new Frg3();
fragment.setArguments(args);
return fragment;
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable final Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View rootView = inflater.inflate(R.layout.fragment_frg3, container, false);
shoot = (ImageButton) rootView.findViewById(R.id.shoot);
snipe = (ImageButton) rootView.findViewById(R.id.snipe);
aim = (ImageButton) rootView.findViewById(R.id.aim);
final View.OnClickListener mListener = new View.OnClickListener() {
#Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.shoot:
FragmentManager FM0 = getFragmentManager();
FragmentTransaction FT0 = FM0.beginTransaction();
frg_shoot F10 = new frg_shoot();
FT0.add(R.id.fragment_container1, F10);
FT0.replace(R.id.fragment_container1, F10);
FT0.commit();
break;
case R.id.snipe:
FragmentManager FM = getFragmentManager();
FragmentTransaction FT = FM.beginTransaction();
frg_snipe F1 = new frg_snipe();
FT.add(R.id.fragment_container1, F1);
FT.replace(R.id.fragment_container1, F1);
FT.commit();
break;
case R.id.aim:
FragmentManager FM1 = getFragmentManager();
FragmentTransaction FT1 = FM1.beginTransaction();
frg_aim F11 = new frg_aim();
FT1.add(R.id.fragment_container1, F11);
FT1.replace(R.id.fragment_container1, F11);
FT1.commit();
break;
}
}
};
rootView.findViewById(R.id.shoot).setOnClickListener(mListener);
rootView.findViewById(R.id.snipe).setOnClickListener(mListener);
rootView.findViewById(R.id.aim).setOnClickListener(mListener);
return rootView;
}
}
Other Activity:
package com.example.android.womb_the_game;
import androidx.fragment.app.FragmentActivity;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageButton;
import android.widget.ImageView;
public class choose_dice_column extends FragmentActivity {
private ImageButton b1;
private ImageView im1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_choose_dice_column);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
b1 = (ImageButton) findViewById(R.id.b1);
im1 = findViewById(R.id.im1);
b1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent i = new Intent(choose_dice_column.this, Circulation.class);
i.putExtra("resid1",R.drawable.n1);
startActivity(i);
}
});
}
}
The problem is, whenever you get back to your activity, you are creating a new adapter. So add the following to your Circulation-Activity to keep the state of the adapter:
if(adapterViewPager == null)
{
adapterViewPager = new Adapter_Circulation(getSupportFragmentManager(), this);
}
Im trying to add a FAB that will add a card to the recycler view if clicked
FAB is located in the fragment where it contains the recyclerview
Here is my Adapter
package com.example.tmcpm;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import java.util.List;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.MyViewHolder> {
Context mContext ;
List<MediCard> mData;
public RecyclerViewAdapter(Context mContext, List<MediCard> mData) {
this.mContext = mContext;
this.mData = mData;
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v ;
v = LayoutInflater.from(mContext).inflate(R.layout.fragment_medicard_recycler,parent,false);
MyViewHolder vHolder = new MyViewHolder(v);
return vHolder;
}
#Override
public void onBindViewHolder(#NonNull MyViewHolder holder, final int position) {
int currentPosition = position;
final MediCard infoData = mData.get(position);
holder.tv_num.setText(mData.get(position).getMediCardNumber());
holder.buttonDelete.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(mContext,"Deleted Medication" , Toast.LENGTH_SHORT).show();
removeItem(infoData);
}
private void removeItem(MediCard infoData) {
int currPosition = mData.indexOf(infoData);
mData.remove(currPosition);
notifyItemRemoved(currPosition);
notifyItemRangeChanged(currPosition,mData.size());
notifyDataSetChanged();
}
});
/* holder.buttonAdd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(mContext,"ADDING", Toast.LENGTH_SHORT).show();
}
});*/
}
#Override
public int getItemCount() {
return mData.size();
}
public static class MyViewHolder extends RecyclerView.ViewHolder {
private TextView tv_num;
private Button buttonDelete;
public FloatingActionButton buttonAdd;
public MyViewHolder(#NonNull View itemView) {
super(itemView);
tv_num = (TextView) itemView.findViewById(R.id.word);
buttonDelete = (Button) itemView.findViewById(R.id.buttonDelete);
buttonAdd = (FloatingActionButton) itemView.findViewById(R.id.floatButtonAdd);
}
}
}
THIS is my Tabbed Activity Java
package com.example.tmcpm;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.material.tabs.TabLayout;
import java.util.ArrayList;
import java.util.List;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentPagerAdapter;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.viewpager.widget.ViewPager;
public class Prescribe extends AppCompatActivity {
// private final LinkedList<String> mWordList = new LinkedList<>();
private RecyclerView myrecyclerview;
private List<MediCard> lstnum;
/**
* The {#link androidx.viewpager.widget.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
* androidx.fragment.app.FragmentStatePagerAdapter.
*/
private SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_prescribe);
//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);
mViewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(mViewPager));
/* for (int i = 1; i < 6; i++) {
mWordList.addLast("Medicine # " + i);
}*/
;
}
#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_prescribe, 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 placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
public PlaceholderFragment() {
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
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) {
RecyclerView myrecyclerview;
List<MediCard> mData = new ArrayList<>();
mData.add(new MediCard("Medication 1"));
mData.add(new MediCard("Medication 2"));
mData.add(new MediCard("Medication 3"));
mData.add(new MediCard("Medication 4 "));
View rootView = null;
switch(getArguments().getInt(ARG_SECTION_NUMBER)){
case 1:
//do something
rootView = inflater.inflate(R.layout.fragment_prescribe, container, false);
break;
case 2:
//do something
rootView = inflater.inflate(R.layout.medicard_fragment,container,false);
myrecyclerview = rootView.findViewById(R.id.medicard_recyclerview);
RecyclerViewAdapter recyclerAdapter = new RecyclerViewAdapter(getContext(),mData);
myrecyclerview.setLayoutManager(new LinearLayoutManager(getActivity()));
myrecyclerview.setAdapter(recyclerAdapter);
new FragmentMedicard();
break;
case 3:
rootView = inflater.inflate(R.layout.medicard_fragment, container, false);
break;
}
//TextView textView = (TextView) rootView.findViewById(R.id.section_label);
// textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
}
/**
* 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) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position + 1);
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
}
}
and the Fragment that holds the recyclerView Java
package com.example.tmcpm;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import java.util.List;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.RecyclerView;
public class FragmentMedicard extends Fragment implements View.OnClickListener {
View v;
private RecyclerView myrecyclerview;
private List<MediCard> mData;
FloatingActionButton fabAdd;
Context mContext;
public View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedinstanceState) {
View myView = inflater.inflate(R.layout.medicard_fragment, container, false);
fabAdd = (FloatingActionButton) myView.findViewById(R.id.floatButtonAdd);
fabAdd.setOnClickListener(this);
return myView;
}
#Override
public void onClick(View v) {
Toast.makeText(mContext,"ADDING", Toast.LENGTH_SHORT).show();
}
}
I really dont know what to do anymore
I tried putting my code for the fab in the adapter which only cause a nullpointer exception which is i think is right since its in a different fragment
Create an instance variable to hold your recyclerAdapter in your fragment. Then you can have the FAB click listener add a MediaCard to mData.
Then call
recyclerAdapter.notifyDataSetChanged();
I have a custom viewPagerAdapter in this activity, when the first launch of the activity (When the main activity starts it with the intent) the pager displays the fragments correctly, but when I rotate the device, the recipe is got from the savedInstantState, and the adapter is started, but the fragments are not displayed and the getItem method doesn't get callled!
Here's the code for the Activity:
package com.ameer.bake.activities;
import android.content.Intent;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.NavUtils;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.ViewGroup;
import com.ameer.bake.Constants;
import com.ameer.bake.fragments.IngredientsFragment;
import com.ameer.bake.fragments.StepDetailsFragment;
import com.ameer.bake.fragments.StepsFragment;
import com.ameer.bake.R;
import com.ameer.bake.models.Recipe;
import com.ameer.bake.models.Step;
import com.google.gson.Gson;
import com.ogaclejapan.smarttablayout.SmartTabLayout;
public class DetailsActivity extends AppCompatActivity implements StepsFragment.StepCallback{
private Recipe recipe;
private IngredientsFragment ingredientsFragment;
private StepsFragment stepsFragment;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_details);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
if (savedInstanceState != null){
recipe = new Gson().fromJson(savedInstanceState.getString(Constants.RECIPE), Recipe.class);
setupViewPager();
} else if (getIntent().hasExtra(Constants.CURRENT_RECIPE_KEY) ) {
Gson gson = new Gson();
recipe = gson.fromJson(getIntent().getStringExtra(Constants.CURRENT_RECIPE_KEY), Recipe.class);
setTitle(recipe.getName());
setupViewPager();
}
}
#Override
public void onStepClicked(Step step) {
Intent intent = new Intent(DetailsActivity.this, StepActivity.class);
intent.putExtra(Constants.STEP_KEY, new Gson().toJson(step));
startActivity(intent);
}
private class RecipePagerAdapter extends FragmentPagerAdapter {
private static final int NUM_ITEMS = 2;
private final String[] titles = new String[]{
getString(R.string.ingredients), getString(R.string.steps)};
private RecipePagerAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
if (ingredientsFragment == null && stepsFragment == null) {
ingredientsFragment = new IngredientsFragment();
ingredientsFragment.setIngredients(recipe.getIngredients());
stepsFragment = new StepsFragment();
stepsFragment.setSteps(recipe.getSteps());
stepsFragment.setCallback(DetailsActivity.this);
}
}
// Returns total number of pages
#Override
public int getCount() {
return NUM_ITEMS;
}
// Returns the fragment to display for that page
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return ingredientsFragment;
case 1:
return stepsFragment;
default:
return null;
}
}
// Returns the page title for the top indicator
#Override
public CharSequence getPageTitle(int position) {
return titles[position];
}
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home){
NavUtils.navigateUpFromSameTask(this);
}
return super.onOptionsItemSelected(item);
}
#Override
public void onSaveInstanceState(Bundle savedInstanceState) {
savedInstanceState.putString(Constants.RECIPE, new Gson().toJson(recipe));
super.onSaveInstanceState(savedInstanceState);
}
private void setupViewPager(){
ViewPager vpPager = (ViewPager) findViewById(R.id.vpPager);
FragmentPagerAdapter pagerAdapter = new RecipePagerAdapter(getSupportFragmentManager());
vpPager.setAdapter(pagerAdapter);
SmartTabLayout viewPagerTab = (SmartTabLayout) findViewById(R.id.viewpager_tab);
viewPagerTab.setViewPager(vpPager);
}
}
Switch to a FragmentStatePagerAdapter rather than using FragmentPagerAdapter. Also use getChildFragmentManager() instead of getSupportFragmentManager()
The solution was as Pedro Varela mentioned in the comments:
"Hope this works. Add setRetainInstance(true); in onCreate of your internal fragments of the view pager "Control whether a fragment instance is retained across Activity re-creation (such as from a configuration change). This can only be used with fragments not in the back stack. If set, the fragment lifecycle will be slightly different when an activity is recreated""
Thanks
I've been trying to implement a recycler view inside a fragment which displays parsed data using the retrofit library. Whenever I run the project the lists don't show and the monitor says "E/RecyclerView: No adapter attached; skipping layout". Here is my code:
MainActivity:
package com.example.ahmed.newsapp
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.design.widget.TabLayout;
public class MainActivity extends AppCompatActivity {
private static final String TAG = MainActivity.class.getSimpleName();
private static final int ACTIVITY_NUM = 0;
// TODO - insert your themoviedb.org API KEY here
private final static String API_KEY = "<API KEY CENSORED>";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Find the view pager that will allow the user to swipe between fragments
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
// Create an adapter that knows which fragment should be shown
FragmentAdapter adapter = new FragmentAdapter(getSupportFragmentManager
());
// Set the adapter onto the view pager
viewPager.setAdapter(adapter);
TabLayout ob=(TabLayout) findViewById(R.id.sliding_tabs);
ob.setupWithViewPager(viewPager);
}
}
FragmentAdapter:
package com.example.ahmed.newsapp;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
/**
* Created by ahmed on 3/22/2017.
*/
public class FragmentAdapter extends FragmentPagerAdapter {
private String tabs[]=new String[]{"Home","Family Members","Colors"};
public FragmentAdapter(FragmentManager fm){
super(fm);
}
#Override
public Fragment getItem(int position) {
switch(position){
case 0:
return new HomeActivity();
case 1:
return new HomeActivity();
/* case 2:
return new ColorFragment();*/
}
return null;
}
#Override
public CharSequence getPageTitle(int position) {
return tabs[position];
}
#Override
public int getCount() {
return 2;
}
}
NewsAdapter:
package com.example.ahmed.newsapp;
/**
* Created by ahmed on 27-08-17.
*/
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.util.List;
public class NewsAdapter extends RecyclerView.Adapter<NewsAdapter.NewsViewHolder> {
private List<News> news;
private int rowLayout;
private Context context;
public static class NewsViewHolder extends RecyclerView.ViewHolder {
LinearLayout moviesLayout;
TextView movieTitle;
TextView data;
TextView movieDescription;
TextView rating;
public NewsViewHolder(View v) {
super(v);
moviesLayout = (LinearLayout) v.findViewById(R.id.movies_layout);
movieTitle = (TextView) v.findViewById(R.id.title);
data = (TextView) v.findViewById(R.id.subtitle);
movieDescription = (TextView) v.findViewById(R.id.description);
rating = (TextView) v.findViewById(R.id.rating);
}
}
public NewsAdapter(List<News> news, Context context) {
this.news = news;
// this.rowLayout = rowLayout;
this.context = context;
}
#Override
public NewsViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_item_news, parent, false);
return new NewsViewHolder(view);
}
#Override
public void onBindViewHolder(NewsViewHolder holder, final int position) {
holder.movieTitle.setText(news.get(position).getTitle());
holder.data.setText(news.get(position).getReleaseDate());
holder.movieDescription.setText(news.get(position).getOverview());
holder.rating.setText(news.get(position).getVoteAverage().toString());
}
#Override
public int getItemCount() {
return news.size();
}
}
HomeActivity:
package com.example.ahmed.newsapp;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import java.util.List;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import static android.content.ContentValues.TAG;
public class HomeActivity extends Fragment {
RecyclerView recyclerView;
private final static String API_KEY = "<API KEY CENSORED>";
NewsAdapter adapter;
List<News> news,dummy;
View rootview;
public HomeActivity() {
// Required empty public constructor
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootview = inflater.inflate(R.layout.activity_home, container, false);
if (API_KEY.isEmpty()) {
Toast.makeText(getContext(), "Please obtain your API KEY first from themoviedb.org", Toast.LENGTH_LONG).show();
return rootview;
}
ApiInterface apiService =
ApiClient.getClient().create(ApiInterface.class);
recyclerView = (RecyclerView) rootview.findViewById(R.id.home_page_recycler_view);
adapter= new NewsAdapter(dummy,getContext());
Call<NewsResponse> call = apiService.getTopRatedMovies(API_KEY);
call.enqueue(new Callback<NewsResponse>() {
#Override
public void onResponse(Call<NewsResponse> call, Response<NewsResponse> response) {
news = response.body().getResults();
adapter.notifyDataSetChanged();
adapter=new NewsAdapter(news,getContext());
recyclerView.setAdapter(adapter);
// adapter.setData(news);
Log.d(TAG, "Number of movies received: " + news.size());
}
#Override
public void onFailure(Call<NewsResponse> call, Throwable t) {
// Log error here since request failed
Log.e(TAG, t.toString());
}
});
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false));
return rootview;
}
}
i think the problem is in your FragmentAdapter class
just remove return null; statement from your FragmentAdapter like below code
#Override
public Fragment getItem(int position) {
Fragment fragment=null;
switch(position){
case 0:
fragment= new HomeActivity();
case 1:
fragment= new HomeActivity();
/* case 2:
return new ColorFragment();*/
}
return fragment;
}
change this
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false));
recyclerView = (RecyclerView) rootview.findViewById(R.id.home_page_recycler_view);
adapter= new NewsAdapter(dummy,getContext());
You don't need to recreate your adapter when you receive response.
It may looks like:
recyclerView = (RecyclerView) rootview.findViewById(R.id.home_page_recycler_view);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
adapter = new NewsAdapter(null, getActivity());
recyclerView.setAdapter(adapter);
Call<NewsResponse> call = apiService.getTopRatedMovies(API_KEY);
call.enqueue(new Callback<NewsResponse>() {
#Override
public void onResponse(Call<NewsResponse> call, Response<NewsResponse> response) {
news = response.body().getResults();
adapter.setData(news);
Log.d(TAG, "Number of movies received: " + news.size());
}
...
And in NewsAdapter:
...
public void setData(Collection<News> newData) {
news.clear();
news.addAll(newData);
notifyDataSetChanged();
}
#Override
public int getItemCount() {
return news == null ? 0 : news.size();
}
...
I have two fragments and one activity.
DataFragment passes info succesfuly to MainActivity and that's why there is no point providing you the code of it. My issue is , that bundle isn't effective on MyMapFragment which extends SupportMapFragment when I am trying to pass data from MainActivity. Of course I've searched a lot for many days but the only solutions given are for a fragment and not for SupportMapFragment which I think it's different.
MainActivity
package com.manuelpap.mapapp;
import android.app.Fragment;
import android.content.Intent;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.os.Handler;
import com.google.android.gms.maps.SupportMapFragment;
import com.parse.Parse;
public class MainActivity extends AppCompatActivity {
public String mapLocation="EMPTY";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
viewPager.setAdapter(new MyAdapter(getSupportFragmentManager()));
Intent intent = getIntent();
if (getIntent().getExtras() != null) {
mapLocation = intent.getExtras().getString("mapLocation");
Bundle bundle=new Bundle();
bundle.putString("message", "From Activity");
MyMapFragment fragobj=new MyMapFragment();
fragobj.setArguments(bundle);
Log.d("MAPLOCATION", "----MainActivity---- " + mapLocation);
finish(); //I am using this because on DataFragment it's starting again , so I don't need multiple instances of MainActivity
}
}
public class MyAdapter extends FragmentPagerAdapter{
public MyAdapter(FragmentManager fm) {
super(fm);
}
#Override
public android.support.v4.app.Fragment getItem(int i){
if(i==0){
return new DataFragment();
}
else {
return new MyMapFragment();
}
}
#Override
public int getCount(){
return 2; //posa scrolls dexia (pages) theloume
}
#Override
public CharSequence getPageTitle(int position) {
if(position==0){
return "DATA";
}
else {
return "MAP";
}
}
}
}
MyMapFragment
package com.manuelpap.mapapp;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.os.Handler;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptor;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class MyMapFragment extends SupportMapFragment { //kanei extend thn hdh uparxousa class gia to maps ths google alla den mpoorume na thn doume giati einai kleidomenh
public String location="EMPTY";
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
final Handler handler=new Handler();
handler.post(new Runnable() {
#Override
public void run() {
if (getArguments() == null)
location = "------NOTHING RECIEVED------";
else
location =getArguments().getString("message");
Log.d("MAPFRAGMENTLOCATION", location);
handler.postDelayed(this, 200); // set time here to refresh textView
}
});
GoogleMap googleMap = getMap();
googleMap.setMyLocationEnabled(true);
googleMap.getUiSettings().setZoomControlsEnabled(true);
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(new LatLng(40.416775, -3.70379));
googleMap.addMarker(markerOptions);
}
}
It looks like you are finishing your main activity
//I am using this because on DataFragment it's starting again , so I don't need multiple instances of MainActivity
Your DataFragment is in the viewpager so it is supposed to start along with your map fragment. You are not starting multiple instances of main activity that I can see here.
When you call finish() on your main activity that means that the map and pager and everything goes away. Not sure what exactly your looking for but I assume you are trying to pass the location string to the map so I have tailored my answer to fit that use case.
The problem is that you are using new MyMapFragment() without the bundle in the view pager. The other logic that you have in MainActivity pertaining to the Map fragment is not going anything to the one that is displayed with the view pager. Essentially you are just creating another instance of the map fragment that is not displayed anywhere. The view pager is the class that needs the data passed to it.
I thought this link might be helpful here to explain the newInstance Method.
Creating a Fragment: constructor vs newInstance()
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
if (getIntent().getExtras() != null) {
mapLocation = intent.getExtras().getString("mapLocation");
}
viewPager.setAdapter(new MyAdapter(getSupportFragmentManager(), mapLocation));
}
public class MyAdapter extends FragmentPagerAdapter{
private String mMapLocation;
public MyAdapter(FragmentManager fm, String mapLocation) {
super(fm);
mMapLoaction = mapLocation;
}
#Override
public android.support.v4.app.Fragment getItem(int i){
if(i==0){
return new DataFragment();
}
else {
Bundle bndl = new Bundle();
if(!TextUtils.isEmpty(mapLocation))
bndl.putString("message", mapLocation);
return new MyMapFragment.newInstance(bndl);
}
}
public class MyMapFragment extends SupportMapFragment { //kanei extend thn hdh uparxousa class gia to maps ths google alla den mpoorume na thn doume giati einai kleidomenh
public String location="EMPTY";
public static MyMapFragment newInstance(Bundle bundle) {
MyMapFragment myMapFragment= new MyMapFragment ();
if (bundle != null) {
myMapFragment.setArguments(bundle);
}
return myMapFragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if(getArguments()!=null)
location =getArguments().getString("message");
}