Develop Reference

How to pass data between fragments in FragmentPagerAdapter

For my academic project, I want create an application with 4 tabs. The first one will show recent games added to a list, the second one will be a search form, the third will show the search result, and the last one will show the details. I currently have created the code for TabView and the 4 tabs. The problem is that I want to perform a search to get the items I have in a list which meet the search criteria on fragment 2, but I don't know how to pass the data from fragment 2 (textView data and spinner) to fragment 3. My code is the following:
MainActivity.java:
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.design.widget.TabLayout;
import android.view.MenuInflater;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setImageResource(R.drawable.ic_search_white_24dp);
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();
}
});
//TabLayout function call
configureTabLayout();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.menu_exit:
finish();
return true;
case R.id.menu_settings:
Toast.makeText(this, "Under Construction", Toast.LENGTH_LONG).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
//Tab Layout function declaration
private void configureTabLayout() {
//Getting the tab layout
TabLayout tabLayout = findViewById(R.id.tab_layout);
//Adding Tabs
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_home_white_24dp));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_search_white_24dp));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_results_white_24dp));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_details_white_24dp));
//The TabPagerAdapter instance is then
//assigned as the adapter for the ViewPager and the TabLayout component added
//to the page change listener
final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
final PagerAdapter adapter = new TabPagerAdapter
(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
//Finally, the onTabSelectedListener is configured on the TabLayout instance and
//the onTabSelected() method implemented to set the current page on the
//ViewPager based on the currently selected tab number.
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
}
TabPagerAdapter.java
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
public class TabPagerAdapter extends FragmentPagerAdapter{
int tabCount;
public TabPagerAdapter(FragmentManager fm, int numberOfTabs) {
super(fm);
this.tabCount = numberOfTabs;
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new HomeScreenFragment();
case 1:
return new SearchFormFragment();
case 2:
return new SearchResultsFragment();
case 3:
return new DetailsScreenFragment();
default:
return null;
}
}
#Override
public int getCount() {
return tabCount;
}
}
SearchFormFragment.java
package gr.pliroforiki_edu.videogamedb;
import android.content.Intent;
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.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
/**
* A simple {#link Fragment} subclass.
*/
public class SearchFormFragment extends Fragment {
private Button searchButton;
private EditText gameTitleEditText;
Spinner spinnerGenre;
public SearchFormFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(final LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View searchFormView = inflater.inflate(R.layout.fragment_search_form, container, false);
searchButton = searchFormView.findViewById(R.id.searchButton);
gameTitleEditText = searchFormView.findViewById(R.id.game_title_editText);
spinnerGenre = searchFormView.findViewById(R.id.genre_spinner);
ArrayAdapter<CharSequence> genreAdapter = ArrayAdapter.createFromResource(
getActivity(),
R.array.game_genres,
android.R.layout.simple_spinner_item
);
genreAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinnerGenre.setAdapter(genreAdapter);
searchButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String filterGameTitle = gameTitleEditText.getText().toString();
int filterGenreId = spinnerGenre.getSelectedItemPosition();
String message = String.format("Game Title: %s\n Genre: %s", filterGameTitle, filterGenreId);
Toast.makeText(getActivity(),message, Toast.LENGTH_LONG).show();
}
});
// Inflate the layout for this fragment
//return inflater.inflate(R.layout.fragment_search_form, container, false);
return searchFormView;
}
}
SearchResultsFragment.java
import android.content.Intent;
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.ListView;
import android.widget.TextView;
/**
* A simple {#link Fragment} subclass.
*/
public class SearchResultsFragment extends Fragment {
TextView infoTextView;
ListView listViewGames;
public SearchResultsFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View searchResultsView = inflater.inflate(R.layout.fragment_search_results, container, false);
return searchResultsView;
}
private void findViews()
{
infoTextView = getActivity().findViewById(R.id.info_textView);
listViewGames = getActivity().findViewById(R.id.games_listView);
}
}
I want to archive the following via the fragments:
ListActivity.java
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class ListActivity extends AppCompatActivity {
private TextView textViewInfo;
private ListView listViewBooks;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list);
// Animation when this Activity appears
overridePendingTransition(R.anim.pull_in_from_right, R.anim.hold);
// Get user filters from Intent
Intent intent = getIntent();
String filterAuthor = intent.getStringExtra("AUTHOR");
String filterTitle = intent.getStringExtra("TITLE");
int filterGenreId = intent.getIntExtra("GENREID", 0);
findViews();
// Show user filters for information
String message = String.format("Author: %s\nTitle: %s\nGenreId: %d",
filterAuthor, filterTitle, filterGenreId);
textViewInfo.setText(message);
DataStore.LoadBooks(filterAuthor, filterTitle, filterGenreId);
//Complex Object Binding
ListAdapter booksAdapter = new SimpleAdapter(
this,
DataStore.Books,
R.layout.list_item,
new String[]{DataStore.KEY_TITLE, DataStore.KEY_AUTHOR, DataStore.KEY_GENRENAME},
new int[]{R.id.book_item_title, R.id.book_item_author, R.id.book_item_genre}
);
listViewBooks.setAdapter(booksAdapter);
listViewBooks.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent detailsIntent = new Intent(ListActivity.this, DetailsActivity.class);
detailsIntent.putExtra(DataStore.KEY_POSITION, position);
startActivity(detailsIntent);
}
});
}
#Override
protected void onPause(){
overridePendingTransition(R.anim.hold, R.anim.push_out_to_right);
super.onPause();
}
private void findViews(){
textViewInfo = findViewById(R.id.textViewInfo);
listViewBooks = findViewById(R.id.listViewBooks);
}
}
Mainactivity.java
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private EditText textAuthor;
private EditText textTitle;
private EditText textGenre;
private Button buttonSearch;
private Spinner spinnerGenre;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
DataStore.Init(getApplicationContext());
textAuthor = findViewById(R.id.editTextAuthor);
textTitle= findViewById(R.id.editTextAuthor);
buttonSearch = findViewById(R.id.buttonSearch);
spinnerGenre = (Spinner) findViewById(R.id.spinnerGenre);
ArrayAdapter<CharSequence> genreAdapter = ArrayAdapter.createFromResource(
this,
R.array.book_genres,
android.R.layout.simple_spinner_item
);
genreAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinnerGenre.setAdapter(genreAdapter);
buttonSearch.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String filterAuthor = textAuthor.getText().toString();
String filterTitle = textTitle.getText().toString();
int filterGenreId = spinnerGenre.getSelectedItemPosition();
Intent intent = new Intent(MainActivity.this, ListActivity.class);
intent.putExtra("AUTHOR", filterAuthor);
intent.putExtra("TITLE", filterTitle);
intent.putExtra("GENREID", filterGenreId);
startActivity(intent);
}
});
}
}

Try this
pass value between two fragment using bundle
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
public class TabPagerAdapter extends FragmentPagerAdapter{
int tabCount;
public TabPagerAdapter(FragmentManager fm, int numberOfTabs) {
super(fm);
this.tabCount = numberOfTabs;
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new HomeScreenFragment();
case 1:
return new SearchFormFragment();
case 2:
Fragment fragment = new SearchResultsFragment()
Bundle args = new Bundle();
args.putString("Key", "Value");
fragment.setArguments(args);
return fragment;
case 3:
return new DetailsScreenFragment();
default:
return null;
}
}
#Override
public int getCount() {
return tabCount;
}
}
in your onCreateView(....) of SearchResultsFragment
String value = getArguments().getString("Key");
public class SearchResultsFragment extends Fragment {
TextView infoTextView;
ListView listViewGames;
public SearchResultsFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View searchResultsView =
inflater.inflate(R.layout.fragment_search_results, container, false);
String value = getArguments().getString("Key");
return searchResultsView;
}
private void findViews(){
infoTextView = getActivity().findViewById(R.id.info_textView);
listViewGames = getActivity().findViewById(R.id.games_listView);
}
}
hop its help you

There are many ways you can pass objects/values between fragments. In your case, the simplest solution would be to delegate those values to the holding Activity i.e MainActivity.
MainActivity:
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.design.widget.TabLayout;
import android.view.MenuInflater;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
//these will hold your values
String filterGameTitle;
int filterGenreId;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setImageResource(R.drawable.ic_search_white_24dp);
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();
}
});
//TabLayout function call
configureTabLayout();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.menu_exit:
finish();
return true;
case R.id.menu_settings:
Toast.makeText(this, "Under Construction", Toast.LENGTH_LONG).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
//Tab Layout function declaration
private void configureTabLayout() {
//Getting the tab layout
TabLayout tabLayout = findViewById(R.id.tab_layout);
//Adding Tabs
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_home_white_24dp));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_search_white_24dp));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_results_white_24dp));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_details_white_24dp));
//The TabPagerAdapter instance is then
//assigned as the adapter for the ViewPager and the TabLayout component added
//to the page change listener
final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
final PagerAdapter adapter = new TabPagerAdapter
(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
//Finally, the onTabSelectedListener is configured on the TabLayout instance and
//the onTabSelected() method implemented to set the current page on the
//ViewPager based on the currently selected tab number.
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
}
SearchFormFragment:
import android.content.Intent;
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.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
/**
* A simple {#link Fragment} subclass.
*/
public class SearchFormFragment extends Fragment {
private Button searchButton;
private EditText gameTitleEditText;
Spinner spinnerGenre;
public SearchFormFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(final LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View searchFormView = inflater.inflate(R.layout.fragment_search_form, container, false);
searchButton = searchFormView.findViewById(R.id.searchButton);
gameTitleEditText = searchFormView.findViewById(R.id.game_title_editText);
spinnerGenre = searchFormView.findViewById(R.id.genre_spinner);
ArrayAdapter<CharSequence> genreAdapter = ArrayAdapter.createFromResource(
getActivity(),
R.array.game_genres,
android.R.layout.simple_spinner_item
);
genreAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinnerGenre.setAdapter(genreAdapter);
searchButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String filterGameTitle = gameTitleEditText.getText().toString();
int filterGenreId = spinnerGenre.getSelectedItemPosition();
((MainActivity)getActivity()).filterGameTitle = filterGameTitle;
((MainActivity)getActivity()).filterGenreId = filterGenreId;
String message = String.format("Game Title: %s\n Genre: %s", filterGameTitle, filterGenreId);
Toast.makeText(getActivity(),message, Toast.LENGTH_LONG).show();
}
});
// Inflate the layout for this fragment
//return inflater.inflate(R.layout.fragment_search_form, container, false);
return searchFormView;
}
}
SearchResultFragment:
import android.content.Intent;
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.ListView;
import android.widget.TextView;
/**
* A simple {#link Fragment} subclass.
*/
public class SearchResultsFragment extends Fragment {
TextView infoTextView;
ListView listViewGames;
String filterGameTitle;
int filterGenreId;
public SearchResultsFragment() {
// Required empty public constructor
}
#Override
public void onAttach(Context context)
{
filterGameTitle = ((MainActivity)getActivity()).filterGameTitle;
filterGenreId = ((MainActivity)getActivity()).filterGenreId;
super.onAttach(context);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View searchResultsView = inflater.inflate(R.layout.fragment_search_results, container, false);
return searchResultsView;
}
private void findViews()
{
infoTextView = getActivity().findViewById(R.id.info_textView);
listViewGames = getActivity().findViewById(R.id.games_listView);
}
}

You can use interface to send your search string to your activity from fragment 2, and from their you can call all methods in your fragment 3 as fragment3 object will be available to you in your activity, you can make performSearch() in your fragment3 and call it from your activity.
Alternatively you can use something like event bus to avoid the boiler plate code needed to setup interface.
Have a look at this event bus repo https://github.com/greenrobot/EventBus
Register event bus where you want the search string, in your case register the event bus in Fragment3 like this
#Override
public void onStart() {
super.onStart();
EventBus.getDefault().register(this);
}
#Override
public void onStop() {
super.onStop();
EventBus.getDefault().unregister(this);
}
In your Fragment 3 create a function like this
#Subscribe
public void onSearchEvent(String searchString){
//you will get your search string here
}
Now comeback to fragment2 from where you want to send the searchString, you have to put below code from where you want to send searchString, and this posted searchString will be received by fragment 3 in its onSearchEvent method
EventBus.getDefault().post(searchString);

Swipe to refresh webview fragment doesnt load url

I have a webview fragment in my MainActivity. I am trying to add Swipetoview inside it. But when I load the fragment it doesn't load the url.
My fragment:
// Inflate the layout for this fragment
View vDriver=inflater.inflate(R.layout.fragment_drivers, container, false);
mWebView = vDriver.findViewById(R.id.drivers_webview);
mWebView.loadUrl("https://ahmetbarpa-grand-prix.firebaseapp.com/drivers.html");
// Enable Javascript
//WebSettings webSettings = mWebView.getSettings();
//webSettings.setJavaScriptEnabled(true);
// Force links and redirects to open in the WebView instead of in a browser
mWebView.setWebViewClient(new WebViewClient());
swipeLayout = vDriver.findViewById(R.id.fragment_drivers);
swipeLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
mWebView.reload();
new Handler().postDelayed(new Runnable() {
#Override public void run() {
swipeLayout.setRefreshing(false);
}
}, 5000);
}
});
return vDriver;
My fragment layout:
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/fragment_drivers"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Drivers">
<WebView
android:id="#+id/drivers_webview"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</android.support.v4.widget.SwipeRefreshLayout>
I tried different things and this is the last code I tried. What am I doing wrong?
Thanks for your time in advance.
EDIT: MainActivity
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.auth.api.signin.GoogleSignInResult;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.common.api.Status;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthCredential;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.auth.GoogleAuthProvider;
import com.squareup.picasso.Picasso;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener, HomeFragment.OnFragmentNavListener,Drivers.OnDriverNavigationListener {
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
private GoogleApiClient mGoogleApiClient;
private static final int RC_SIGN_IN = 0 ;
private SignInButton btn_signin;
private TextView nameText;
private TextView emailText;
private ImageView imgProfilePic;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
HomeFragment fragment = new HomeFragment();
fragmentTransaction.add(R.id.fragment_container, fragment);
fragmentTransaction.commit();
FloatingActionButton fab = 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();
}
});
DrawerLayout drawer = findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
View navHeader1 = navigationView.getHeaderView(0);
btn_signin = navHeader1.findViewById(R.id.signin_btn);
View navHeader3 = navigationView.getHeaderView(0);
nameText = navHeader3.findViewById(R.id.name);
View navHeader4 = navigationView.getHeaderView(0);
emailText = navHeader4.findViewById(R.id.email);
View navHeader5 = navigationView.getHeaderView(0);
imgProfilePic = navHeader5.findViewById(R.id.imgProfilePic);
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.enableAutoManage(this, new GoogleApiClient.OnConnectionFailedListener() {
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
}
})
.addApi(Auth.GOOGLE_SIGN_IN_API, gso).build();
mAuth = FirebaseAuth.getInstance();
mAuthListener = new FirebaseAuth.AuthStateListener() {
#Override
public void onAuthStateChanged(#NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user != null){
btn_signin.setVisibility(View.GONE);
if(user.getDisplayName() != null) {
nameText.setText(user.getDisplayName());
nameText.setVisibility(View.VISIBLE);
}
emailText.setText(user.getEmail());
emailText.setVisibility(View.VISIBLE);
imgProfilePic.setVisibility(View.VISIBLE);
Picasso.get().load(user.getPhotoUrl())
.into(imgProfilePic);
NavigationView navigationView2 = findViewById(R.id.nav_view);
Menu menu = navigationView2.getMenu();
MenuItem target = menu.findItem(R.id.nav_send);
target.setVisible(false);
MenuItem target2 = menu.findItem(R.id.nav_send2);
target2.setVisible(true);
}
else {
nameText.setVisibility(View.GONE);
emailText.setVisibility(View.GONE);
btn_signin.setVisibility(View.VISIBLE);
NavigationView navigationView2 = findViewById(R.id.nav_view);
Menu menu = navigationView2.getMenu();
MenuItem target = menu.findItem(R.id.nav_send);
target.setVisible(true);
MenuItem target2 = menu.findItem(R.id.nav_send2);
target2.setVisible(false);
imgProfilePic.setVisibility(View.GONE);
}
}
};
btn_signin.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
signIn();
}
});
}
#Override
public void onStart() {
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
}
private void signIn () {
Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
startActivityForResult(signInIntent, RC_SIGN_IN);
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data){
if (requestCode == RC_SIGN_IN) {
GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
if (result.isSuccess()) {
GoogleSignInAccount account = result.getSignInAccount();
firebaseAuthWithGoogle(account);
} else {
// deneme
}
}
}
#Override
public void onStop() {
super.onStop();
if(mAuthListener != null) {
mAuth.removeAuthStateListener(mAuthListener);
}
}
private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
mAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if (!task.isSuccessful()) {
Toast.makeText(getApplicationContext(), "Authentication failed.", Toast.LENGTH_SHORT).show();
}
}
});
}
#Override
public void onBackPressed() {
DrawerLayout drawer = findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#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) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(final MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
signIn();
} else if (id == R.id.nav_send2) {
FirebaseAuth.getInstance().signOut();
Auth.GoogleSignInApi.signOut(mGoogleApiClient).setResultCallback(
new ResultCallback<Status>() {
#Override
public void onResult(#NonNull Status status) {
Toast.makeText(getApplicationContext(), "Çıkış yaptınız.", Toast.LENGTH_SHORT).show();
}
});
}
DrawerLayout drawer = findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
#Override
public void onFragmentNav(int position) {
Fragment navFragment = null;
switch (position) {
case 0:
navFragment = new HomeFragment();
break;
case 1:
navFragment = new Drivers();
break;
}
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.fragment_container, navFragment)
.addToBackStack(null)
.commit();
}
#Override
public void onDriverNavigation(int asd) {
}
}
HomeFragment.java
package com.ahmetbarpa.grandprix;
import android.content.Context;
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.Button;
import android.widget.Toast;
public class HomeFragment extends Fragment {
private OnFragmentNavListener mListener;
public HomeFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View v1 =inflater.inflate(R.layout.fragment_home, container, false);
Button profile= v1.findViewById(R.id.button1);
profile.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v1) {
onButtonSelected(1);
}
});
Button education= v1.findViewById(R.id.button2);
education.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v1) {
Toast.makeText(getContext(),"Takımlar ve arabalar",Toast.LENGTH_SHORT).show();
}
});
Button health= v1.findViewById(R.id.button3);
health.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v1) {
Toast.makeText(getContext(),"Pistler",Toast.LENGTH_SHORT).show();
}
});
Button goals= v1.findViewById(R.id.button4);
goals.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v1) {
Toast.makeText(getContext(),"Sıralama",Toast.LENGTH_SHORT).show();
}
});
Button finance= v1.findViewById(R.id.button5);
finance.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v1) {
Toast.makeText(getContext(),"Grand Prix Tarihi",Toast.LENGTH_SHORT).show();
}
});
Button comfort= v1.findViewById(R.id.button6);
comfort.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v1) {
Toast.makeText(getContext(),"GP kart oyunu",Toast.LENGTH_SHORT).show();
}
});
return v1;
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonSelected(int position) {
if (mListener != null) {
mListener.onFragmentNav(position);
}
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentNavListener) {
mListener = (OnFragmentNavListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentNav");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
/**
* 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 OnFragmentNavListener {
void onFragmentNav(int position);
}
}

Instead of reload()
mWebView.loadUrl("https://ahmetbarpa-grand-prix.firebaseapp.com/drivers.html");
Try it..
If this is not the way you want, the second method is:
make a new class as:
private class MyBrowser extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
then, Instead of this:
mWebView.setWebViewClient(new WebViewClient());
write this:
mWebView.setWebViewClient(new MyBrowser());
Hopefully your problem will be solved

How to add another FragmentActivity that is into MainActivity?

I got my MainActivity class extends as AppCompatActivity but I want to add a new activity as below. I tried to use intent to add it into the MainActivity. However, when I open the app, it crashes when I trigger the function. Here are the codes for two activities.
MainActivity.java
package com.michael.jared.navigationdrawerloginsqlite;
import android.app.FragmentManager;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.graphics.drawable.RoundedBitmapDrawable;
import android.support.v4.graphics.drawable.RoundedBitmapDrawableFactory;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import com.michael.jared.navigationdrawerloginsqlite.database.DatabaseManagerUser;
import com.michael.jared.navigationdrawerloginsqlite.entity.User;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private DatabaseManagerUser databaseManagerUser;
private User itemUsuario;
private String ident;
public ViewPagerActivity vpa;
TextView textView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//se agrego codigo del 39 al 68
Bundle b = getIntent().getExtras();
ident = b.getString("IDENT");
databaseManagerUser= new DatabaseManagerUser(getApplicationContext());
itemUsuario = databaseManagerUser.getUsuario(ident); // encuentra al usuario registrado en la bbdd
View header = ((NavigationView)findViewById(R.id.nav_view)).getHeaderView(0);
((TextView) header.findViewById(R.id.tv_nombre_usuario_menu)).setText(itemUsuario.getNombre());
((TextView) header.findViewById(R.id.tv_correo_menu)).setText(itemUsuario.getCorreo());
Bitmap bitmapsinfoto = BitmapFactory.decodeResource(getResources(),R.drawable.imagen);
RoundedBitmapDrawable roundedBitmapDrawablesinfoto = RoundedBitmapDrawableFactory.create(getResources(), bitmapsinfoto);
roundedBitmapDrawablesinfoto.setCircular(true);
((ImageView) header.findViewById(R.id.imageView)).setImageDrawable(roundedBitmapDrawablesinfoto);
if(itemUsuario.getBytes()!=null){
byte[] foodImage = itemUsuario.getBytes();
Bitmap bitmap = BitmapFactory.decodeByteArray(foodImage, 0, foodImage.length);
((ImageView) header.findViewById(R.id.imageView)).setImageBitmap(bitmap);
Bitmap bitmap2 = ((BitmapDrawable)((ImageView) header.findViewById(R.id.imageView)).getDrawable()).getBitmap();
RoundedBitmapDrawable roundedBitmapDrawable = RoundedBitmapDrawableFactory.create(getResources(), bitmap2);
roundedBitmapDrawable.setCircular(true);
((ImageView) header.findViewById(R.id.imageView)).setImageDrawable(roundedBitmapDrawable);
}
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
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();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#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 onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
FragmentManager fragmentManager = getFragmentManager();
if (id == R.id.nav_first_layout) {
fragmentManager.beginTransaction()
.replace(R.id.content_frame
, new FirstFragment())
.commit();
} else if (id == R.id.nav_second_layout) {
fragmentManager.beginTransaction()
.replace(R.id.content_frame
, new SecondFragment())
.commit();
} else if (id == R.id.nav_third_layout) {
fragmentManager.beginTransaction()
.replace(R.id.content_frame
, new ThirdFragment())
.commit();
} else if (id == R.id.nav_fourth_layout) {
fragmentManager.beginTransaction()
.replace(R.id.content_frame
, new FourthFragment())
.commit();
} else if (id == R.id.nav_share) {
startActivity(new Intent(this, ViewPagerActivity.class));
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
ViewPagerActivity.java
package com.michael.jared.navigationdrawerloginsqlite;
import android.annotation.SuppressLint;
import android.os.Build;
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.util.SparseArrayCompat;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.widget.AbsListView;
import android.widget.TextView;
#SuppressLint("NewApi")
public class ViewPagerActivity extends FragmentActivity implements
ScrollTabHolder, ViewPager.OnPageChangeListener {
public static final boolean NEEDS_PROXY = Integer.valueOf(Build.VERSION.SDK_INT).intValue() < 11;
private View mHeader;
private PagerSlidingTabStrip mPagerSlidingTabStrip;
private ViewPager mViewPager;
private PagerAdapter mPagerAdapter;
private int mMinHeaderHeight;
private int mHeaderHeight;
private int mMinHeaderTranslation;
private TextView info;
private int mLastY;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mMinHeaderHeight = getResources().getDimensionPixelSize(R.dimen.min_header_height);
mHeaderHeight = getResources().getDimensionPixelSize(R.dimen.header_height);
mMinHeaderTranslation = -mMinHeaderHeight;
setContentView(R.layout.activity_main);
mHeader = findViewById(R.id.header);
info = (TextView) findViewById(R.id.info);
mPagerSlidingTabStrip = (PagerSlidingTabStrip) findViewById(R.id.tabs);
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setOffscreenPageLimit(4);
mPagerAdapter = new PagerAdapter(getSupportFragmentManager());
mPagerAdapter.setTabHolderScrollingContent(this);
mViewPager.setAdapter(mPagerAdapter);
mPagerSlidingTabStrip.setViewPager(mViewPager);
mPagerSlidingTabStrip.setOnPageChangeListener(this);
mLastY=0;
}
#Override
public void onPageScrollStateChanged(int arg0) {
// nothing
}
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if (positionOffsetPixels > 0) {
int currentItem = mViewPager.getCurrentItem();
SparseArrayCompat<ScrollTabHolder> scrollTabHolders = mPagerAdapter.getScrollTabHolders();
ScrollTabHolder currentHolder;
if (position < currentItem) {
currentHolder = scrollTabHolders.valueAt(position);
} else {
currentHolder = scrollTabHolders.valueAt(position + 1);
}
if (NEEDS_PROXY) {
// TODO is not good
currentHolder.adjustScroll(mHeader.getHeight() - mLastY);
mHeader.postInvalidate();
} else {
currentHolder.adjustScroll((int) (mHeader.getHeight() + mHeader.getTranslationY()));
}
}
}
#Override
public void onPageSelected(int position) {
SparseArrayCompat<ScrollTabHolder> scrollTabHolders = mPagerAdapter.getScrollTabHolders();
ScrollTabHolder currentHolder = scrollTabHolders.valueAt(position);
if(NEEDS_PROXY){
//TODO is not good
currentHolder.adjustScroll(mHeader.getHeight()-mLastY);
mHeader.postInvalidate();
}else{
currentHolder.adjustScroll((int) (mHeader.getHeight() +mHeader.getTranslationY()));
}
}
#Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount, int pagePosition) {
if (mViewPager.getCurrentItem() == pagePosition) {
int scrollY = getScrollY(view);
if(NEEDS_PROXY){
//TODO is not good
mLastY=-Math.max(-scrollY, mMinHeaderTranslation);
info.setText(String.valueOf(scrollY));
mHeader.scrollTo(0, mLastY);
mHeader.postInvalidate();
}else{
mHeader.setTranslationY(Math.max(-scrollY, mMinHeaderTranslation));
}
}
}
#Override
public void adjustScroll(int scrollHeight) {
// nothing
}
public int getScrollY(AbsListView view) {
View c = view.getChildAt(0);
if (c == null) {
return 0;
}
int firstVisiblePosition = view.getFirstVisiblePosition();
int top = c.getTop();
int headerHeight = 0;
if (firstVisiblePosition >= 1) {
headerHeight = mHeaderHeight;
}
return -top + firstVisiblePosition * c.getHeight() + headerHeight;
}
public static float clamp(float value, float max, float min) {
return Math.max(Math.min(value, min), max);
}
public class PagerAdapter extends FragmentPagerAdapter {
private SparseArrayCompat<ScrollTabHolder> mScrollTabHolders;
private final String[] TITLES = { "Page 1", "Page 2", "Page 3", "Page 4"};
private ScrollTabHolder mListener;
public PagerAdapter(FragmentManager fm) {
super(fm);
mScrollTabHolders = new SparseArrayCompat<ScrollTabHolder>();
}
public void setTabHolderScrollingContent(ScrollTabHolder listener) {
mListener = listener;
}
#Override
public CharSequence getPageTitle(int position) {
return TITLES[position];
}
#Override
public int getCount() {
return TITLES.length;
}
#Override
public Fragment getItem(int position) {
ScrollTabHolderFragment fragment = (ScrollTabHolderFragment) SampleListFragment.newInstance(position);
mScrollTabHolders.put(position, fragment);
if (mListener != null) {
fragment.setScrollTabHolder(mListener);
}
return fragment;
}
public SparseArrayCompat<ScrollTabHolder> getScrollTabHolders() {
return mScrollTabHolders;
}
}
}

Making my navigation list from the right

I have an activity that includes a navigation list and it slides from the left and it is working but I want the list to be at the right side.
I tried to change the gravity_layout from my xml file but the app crashed.
package com.parse.starter;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import com.parse.ParseUser;
public class UserDrawer extends AppCompatActivity {
//Declaring Variables
private ListView DrawerList;
private ArrayAdapter<String> Adapter;
private ActionBarDrawerToggle DrawerToggle;
private DrawerLayout DrawerLayout;
private String ActivityTitle;
final ParseUser currentUser = ParseUser.getCurrentUser();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_drawer);
DrawerList = (ListView) findViewById(R.id.navList);
DrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
ActivityTitle = getTitle().toString();
addDrawerItems();
setupDrawer();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
Button Sample = (Button) findViewById(R.id.button);
}
//Method To Add Items To The List View
private void addDrawerItems() {
String[] DArray = {"Job List", "Notifications", "Messages", "Log Out"};
Adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, DArray);
DrawerList.setAdapter(Adapter);
DrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (position == 0) {
Intent i0 = new Intent(UserDrawer.this, Set_Info.class);
startActivity(i0);
} else if (position == 1) {
//Intent i1 = new Intent(Drawer1.this, AddPatient.class);
//startActivity(i1);
} else if (position == 2) {
//Intent i2 = new Intent(Drawer1.this, Notifications.class);
//startActivity(i2);
} else if (position == 3) {
//Intent i3 = new Intent(Drawer1.this, Message_Log.class);
//startActivity(i3);
} else if (position == 4) {
Intent i4 = new Intent(UserDrawer.this, MainActivity.class);
startActivity(i4);
Toast.makeText(getApplicationContext(), "You are Logged Out", Toast.LENGTH_LONG).show();
finish();
}
}
});
}
private void setupDrawer() {
DrawerToggle = new ActionBarDrawerToggle(this, DrawerLayout,
R.string.drawer_open, R.string.drawer_close) {
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getSupportActionBar().setTitle("Menu");
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getSupportActionBar().setTitle(ActivityTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
DrawerToggle.setDrawerIndicatorEnabled(true);
DrawerLayout.setDrawerListener(DrawerToggle);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Activate the navigation drawer toggle
if (DrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
DrawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
DrawerToggle.onConfigurationChanged(newConfig);
}
#SuppressWarnings("ResourceType")
public void SampleClick(View view) {
try {
Intent i = new Intent(UserDrawer.this,Set_Info.class);
startActivity(i);
} catch (Exception e) {
}
}
}

http://developer.android.com/reference/android/support/v4/widget/DrawerLayout.html
Drawer positioning and layout is controlled using the android:layout_gravity attribute on child views corresponding to which side of the view you want the drawer to emerge from: left or right. (Or start/end on platform versions that support layout direction.)
i.e. it's android:layout_gravity instead of gravity_layout and it should no longer crash.

try gravity:Endor Right instead of gravity:Startread this answer

Navigation drawer fragment class not showing up

My navigation drawer only show the first fragment class and 1 other class.I have 8 fragment class for menu in my drawer. When I click the other fragment class, it will be blank.
Here is the NavigationDrawerFragment.java :
import android.app.Activity;
import android.app.Fragment;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
/**
* Fragment used for managing interactions for and presentation of a navigation drawer.
* See the <a href="https://developer.android.com/design/patterns/navigation-drawer.html#Interaction">
* design guidelines</a> for a complete explanation of the behaviors implemented here.
*/
public class NavigationDrawerFragment extends Fragment implements NavigationDrawerCallbacks {
/**
* Remember the position of the selected item.
*/
private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position";
/**
* Per the design guidelines, you should show the drawer on launch until the user manually
* expands it. This shared preference tracks this.
*/
private static final String PREF_USER_LEARNED_DRAWER = "navigation_drawer_learned";
/**
* A pointer to the current callbacks instance (the Activity).
*/
private NavigationDrawerCallbacks mCallbacks;
/**
* Helper component that ties the action bar to the navigation drawer.
*/
private ActionBarDrawerToggle mActionBarDrawerToggle;
private DrawerLayout mDrawerLayout;
public RecyclerView mDrawerList;
private View mFragmentContainerView;
private int mCurrentSelectedPosition = 0;
private boolean mFromSavedInstanceState;
private boolean mUserLearnedDrawer;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Read in the flag indicating whether or not the user has demonstrated awareness of the
// drawer. See PREF_USER_LEARNED_DRAWER for details.
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity());
mUserLearnedDrawer = sp.getBoolean(PREF_USER_LEARNED_DRAWER, false);
if (savedInstanceState != null) {
mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION);
mFromSavedInstanceState = true;
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
mDrawerList = (RecyclerView) view.findViewById(R.id.drawerList);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
mDrawerList.setLayoutManager(layoutManager);
mDrawerList.setHasFixedSize(true);
final List<NavigationItem> navigationItems = getMenu();
NavigationDrawerAdapter adapter = new NavigationDrawerAdapter(navigationItems);
adapter.setNavigationDrawerCallbacks(this);
mDrawerList.setAdapter(adapter);
selectItem(mCurrentSelectedPosition);
return view;
}
public boolean isDrawerOpen() {
return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView);
}
public ActionBarDrawerToggle getActionBarDrawerToggle() {
return mActionBarDrawerToggle;
}
public DrawerLayout getDrawerLayout() {
return mDrawerLayout;
}
#Override
public void onNavigationDrawerItemSelected(int position) {
selectItem(position);
}
public List<NavigationItem> getMenu() {
List<NavigationItem> items = new ArrayList<NavigationItem>();
items.add(new NavigationItem(getString(R.string.Home), getResources().getDrawable(R.drawable.ico_home)));
items.add(new NavigationItem(getString(R.string.Map), getResources().getDrawable(R.drawable.ico_map)));
items.add(new NavigationItem(getString(R.string.Departments), getResources().getDrawable(R.drawable.ico_dpt)));
items.add(new NavigationItem(getString(R.string.Units), getResources().getDrawable(R.drawable.ico_unit)));
items.add(new NavigationItem(getString(R.string.Gallery), getResources().getDrawable(R.drawable.ico_gallery)));
items.add(new NavigationItem(getString(R.string.AboutPSIS), getResources().getDrawable(R.drawable.ico_about)));
items.add(new NavigationItem(getString(R.string.Help), getResources().getDrawable(R.drawable.ico_help)));
items.add(new NavigationItem(getString(R.string.Credits), getResources().getDrawable(R.drawable.ico_credit)));
return items;
}
/**
* Users of this fragment must call this method to set up the navigation drawer interactions.
*
* #param fragmentId The android:id of this fragment in its activity's layout.
* #param drawerLayout The DrawerLayout containing this fragment's UI.
* #param toolbar The Toolbar of the activity.
*/
public void setup(int fragmentId, DrawerLayout drawerLayout, Toolbar toolbar) {
mFragmentContainerView = (View) getActivity().findViewById(fragmentId).getParent();
mDrawerLayout = drawerLayout;
mDrawerLayout.setStatusBarBackgroundColor(getResources().getColor(R.color.myPrimaryDarkColor));
mActionBarDrawerToggle = new ActionBarDrawerToggle(getActivity(), mDrawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close) {
#Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
if (!isAdded()) return;
getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
#Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (!isAdded()) return;
if (!mUserLearnedDrawer) {
mUserLearnedDrawer = true;
SharedPreferences sp = PreferenceManager
.getDefaultSharedPreferences(getActivity());
sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply();
}
getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
};
// If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer,
// per the navigation drawer design guidelines.
if (!mUserLearnedDrawer && !mFromSavedInstanceState) {
mDrawerLayout.openDrawer(mFragmentContainerView);
}
// Defer code dependent on restoration of previous instance state.
mDrawerLayout.post(new Runnable() {
#Override
public void run() {
mActionBarDrawerToggle.syncState();
}
});
mDrawerLayout.setDrawerListener(mActionBarDrawerToggle);
}
private void selectItem(int position) {
mCurrentSelectedPosition = position;
if (mDrawerLayout != null) {
mDrawerLayout.closeDrawer(mFragmentContainerView);
}
if (mCallbacks != null) {
mCallbacks.onNavigationDrawerItemSelected(position);
}
((NavigationDrawerAdapter) mDrawerList.getAdapter()).selectPosition(position);
}
public void openDrawer() {
mDrawerLayout.openDrawer(mFragmentContainerView);
}
public void closeDrawer() {
mDrawerLayout.closeDrawer(mFragmentContainerView);
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mCallbacks = (NavigationDrawerCallbacks) activity;
} catch (ClassCastException e) {
throw new ClassCastException("Activity must implement NavigationDrawerCallbacks.");
}
}
#Override
public void onDetach() {
super.onDetach();
mCallbacks = null;
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition);
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Forward the new configuration the drawer toggle component.
mActionBarDrawerToggle.onConfigurationChanged(newConfig);
}
/*
public void setUserData(String user, String email, Bitmap avatar) {
ImageView avatarContainer = (ImageView) mFragmentContainerView.findViewById(R.id.imgAvatar);
((TextView) mFragmentContainerView.findViewById(R.id.txtUserEmail)).setText(email);
((TextView) mFragmentContainerView.findViewById(R.id.txtUsername)).setText(user);
avatarContainer.setImageDrawable(new RoundImage(avatar));
}
*/
public View getGoogleDrawer() {
return mFragmentContainerView.findViewById(R.id.googleDrawer);
}
public static class RoundImage extends Drawable {
private final Bitmap mBitmap;
private final Paint mPaint;
private final RectF mRectF;
private final int mBitmapWidth;
private final int mBitmapHeight;
public RoundImage(Bitmap bitmap) {
mBitmap = bitmap;
mRectF = new RectF();
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
final BitmapShader shader = new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
mPaint.setShader(shader);
mBitmapWidth = mBitmap.getWidth();
mBitmapHeight = mBitmap.getHeight();
}
#Override
public void draw(Canvas canvas) {
canvas.drawOval(mRectF, mPaint);
}
#Override
protected void onBoundsChange(Rect bounds) {
super.onBoundsChange(bounds);
mRectF.set(bounds);
}
#Override
public void setAlpha(int alpha) {
if (mPaint.getAlpha() != alpha) {
mPaint.setAlpha(alpha);
invalidateSelf();
}
}
#Override
public void setColorFilter(ColorFilter cf) {
mPaint.setColorFilter(cf);
}
#Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
#Override
public int getIntrinsicWidth() {
return mBitmapWidth;
}
#Override
public int getIntrinsicHeight() {
return mBitmapHeight;
}
public void setAntiAlias(boolean aa) {
mPaint.setAntiAlias(aa);
invalidateSelf();
}
#Override
public void setFilterBitmap(boolean filter) {
mPaint.setFilterBitmap(filter);
invalidateSelf();
}
#Override
public void setDither(boolean dither) {
mPaint.setDither(dither);
invalidateSelf();
}
public Bitmap getBitmap() {
return mBitmap;
}
}
}
this class handle the drawer click :
package com.example.tropo;
import android.app.Fragment;
import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends ActionBarActivity
implements NavigationDrawerCallbacks {
/**
* Fragment managing the behaviors, interactions and presentation of the navigation drawer.
*/
private NavigationDrawerFragment mNavigationDrawerFragment;
private Toolbar mToolbar;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mToolbar = (Toolbar) findViewById(R.id.toolbar_actionbar);
setSupportActionBar(mToolbar);
mNavigationDrawerFragment = (NavigationDrawerFragment)
getFragmentManager().findFragmentById(R.id.fragment_drawer);
// Set up the drawer.
mNavigationDrawerFragment.setup(R.id.fragment_drawer, (DrawerLayout) findViewById(R.id.drawer), mToolbar);
}
#Override
public void onNavigationDrawerItemSelected(int position) {
Fragment fragment;
switch (position) {
case 0: //Home
fragment = getFragmentManager().findFragmentByTag(D_Home.TAG);
if (fragment == null) {
fragment = new D_Home();
}
getFragmentManager().beginTransaction().replace(R.id.container, fragment, D_Home.TAG).commit();
break;
case 1: //Map
fragment = getFragmentManager().findFragmentByTag(D_Map.TAG);
if (fragment == null) {
fragment = new D_Map();
}
getFragmentManager().beginTransaction().replace(R.id.container, fragment, D_Map.TAG).commit();
break;
case 2: //Departments
fragment = getFragmentManager().findFragmentByTag(D_Departments.TAG);
if (fragment == null) {
fragment = new D_Departments();
}
getFragmentManager().beginTransaction().replace(R.id.container, fragment, D_Departments.TAG).commit();
break;
case 3: //Units
fragment = getFragmentManager().findFragmentByTag(D_Units.TAG);
if (fragment == null) {
fragment = new D_Units();
}
getFragmentManager().beginTransaction().replace(R.id.container, fragment, D_Units.TAG).commit();
break;
case 4: //Gallery
fragment = getFragmentManager().findFragmentByTag(D_Gallery.TAG);
if (fragment == null) {
fragment = new D_Gallery();
}
getFragmentManager().beginTransaction().replace(R.id.container, fragment, D_Gallery.TAG).commit();
break;
case 5: //About PSIS
fragment = getFragmentManager().findFragmentByTag(D_About.TAG);
if (fragment == null) {
fragment = new D_About();
}
getFragmentManager().beginTransaction().replace(R.id.container, fragment, D_About.TAG).commit();
break;
case 6: //Help
fragment = getFragmentManager().findFragmentByTag(D_Help.TAG);
if (fragment == null) {
fragment = new D_Help();
}
getFragmentManager().beginTransaction().replace(R.id.container, fragment, D_Help.TAG).commit();
break;
case 7: //Credit
fragment = getFragmentManager().findFragmentByTag(D_Credit.TAG);
if (fragment == null) {
fragment = new D_Credit();
}
getFragmentManager().beginTransaction().replace(R.id.container, fragment, D_Credit.TAG).commit();
break;
}
}
#Override
public void onBackPressed() {
if (mNavigationDrawerFragment.isDrawerOpen())
mNavigationDrawerFragment.closeDrawer();
else
super.onBackPressed();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
if (!mNavigationDrawerFragment.isDrawerOpen()) {
// Only show items in the action bar relevant to this screen
// if the drawer is not showing. Otherwise, let the drawer
// decide what to show in the action bar.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
return super.onCreateOptionsMenu(menu);
}
#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();
return super.onOptionsItemSelected(item);
}
public void onActivityCreated(Bundle savedInstanceState) {
}
}