what should I change? because I find so many errors if I change it to Fragment .. check out my code and help me fix it please
this is the package:
package com.example.ashraf.myapplication;
import android.support.annotation.Nullable;
import android.support.design.widget.TabLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.view.PagerAdapter;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.widget.TextView;
and this is my class:
public class machinemessage extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tab);
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));
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();
}
});
}
#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_tab, 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 tab.PlaceholderFragment newInstance(int sectionNumber) {
tab.PlaceholderFragment fragment = new tab.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) {
View rootView = inflater.inflate(R.layout.fragment_tab, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.section_label);
textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
}
/**
* 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 tab.PlaceholderFragment.newInstance(position + 1);
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
}
}
I recommend you to step by step copy the code of your Activity into a Fragment. See this Stackoverflow answer to get instructions in how to convert an Activity to a Fragment.
Related
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);
I know there has been a question similar to this, but I have a slightly different problem.
I created the default tabbed activity for android and am using it as is given by Android Studio. I was wondering what the behavior of the onCreateView() function for the Placeholder Fragment is and whether I would be able to change it so that, at the beginning of the activity, it calls the onCreateView() for all three of the Placeholder Fragments, and never calls this function again?
Thanks in advance.
Here is the default tabbed activity for reference:
package com.example.myname.myproject;
import android.support.design.widget.TabLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class SampleActivity extends AppCompatActivity {
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {#link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {#link android.support.v4.app.FragmentStatePagerAdapter}.
*/
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_sample);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
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();
}
});
}
#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_sample, 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) {
View rootView = inflater.inflate(R.layout.fragment_sample, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.section_label);
textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
}
/**
* 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;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "SECTION 1";
case 1:
return "SECTION 2";
case 2:
return "SECTION 3";
}
return null;
}
}
}
Sorry, I should have done some more research: mViewPager.setOffscreenPageLimit(3); works
i want to put icons instead of text in the tabs. I'm using the tabbed activity and here is the code of the mainactivity.java
package com.example;
import android.support.design.widget.TabLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.NotificationCompat;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
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();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
switch (position) {
case 0:
return FragmentOne.newInstance("a","b");
case 1:
return FragmentTwo.newInstance("a","b");
case 2:
return FragmentThree.newInstance("a","b");
case 3:
return FragmentFour.newInstance("a","b");
case 4:
return FragmentFive.newInstance("a","b");
default:
return FragmentThree.newInstance("a","b");
}
}
#Override
public int getCount() {
return 5;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "One";
case 1:
return "Two";
case 2:
return "Three";
case 3:
return "Four";
case 4:
return "Five";
}
return null;
}
}
public static class PlaceholderFragment extends Fragment {
private static final String ARG_SECTION_NUMBER = "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;
}
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.section_label);
textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
}
}
I tried a lot with code and examples i found on the internet but nothing worked.
I created simple application in android studio. Im using NavigationDrawerFragment.. Im insert date picker coding but i got an error in getSupportFragmentManager() method
Here my full Main Activity code:
package com.example.clive.mydatepickerapp;
import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.support.v4.widget.DrawerLayout;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import android.support.v4.app.FragmentActivity;
public class MainActivity extends Activity
implements NavigationDrawerFragment.NavigationDrawerCallbacks {
/**
* Fragment managing the behaviors, interactions and presentation of the navigation drawer.
*/
private NavigationDrawerFragment mNavigationDrawerFragment;
/**
* Used to store the last screen title. For use in {#link #restoreActionBar()}.
*/
private CharSequence mTitle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
mNavigationDrawerFragment = (NavigationDrawerFragment)
getFragmentManager().findFragmentById(R.id.navigation_drawer);
mTitle = getTitle();
// Set up the drawer.
mNavigationDrawerFragment.setUp(
R.id.navigation_drawer,
(DrawerLayout) findViewById(R.id.drawer_layout));
}
public void doDatePicker(View view) {
DialogFragment myDatePickerFragment = new MyDatePickerFragment();
myDatePickerFragment.show(getSupportFragmentManager(), "datePicker");
}
#Override
public void onNavigationDrawerItemSelected(int position) {
// update the main content by replacing fragments
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container, PlaceholderFragment.newInstance(position + 1))
.commit();
}
public void onSectionAttached(int number) {
switch (number) {
case 1:
mTitle = getString(R.string.title_section1);
break;
case 2:
mTitle = getString(R.string.title_section2);
break;
case 3:
mTitle = getString(R.string.title_section3);
break;
}
}
public void restoreActionBar() {
ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setTitle(mTitle);
}
#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);
restoreActionBar();
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();
//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";
/**
* 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;
}
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
((MainActivity) activity).onSectionAttached(
getArguments().getInt(ARG_SECTION_NUMBER));
}
}
}
Please anyone help!!
instead of Activity:
public class MainActivity extends Activity
extend FragmentActivity:
public class MainActivity extends FragmentActivity
and make sure that you are importing SupportLibrary:
import android.support.v4.app.Fragment;
in order to use getSupportFragmentManager()
I was having the same problem. Then I replaced getSupportFragmentManager() with getFragmentManager(), and it worked!
I was using these 2 imports:
import android.support.v4.app.Fragment;
import android.app.FragmentTransaction;
And my MainActivity extended the Activity class.
Had these issues many times . What worked for me was :
Simply extend the Main class with AppCompatActivity than the usual ACTIVITY
In short :
replace Acivity with AppCompatActivity
Instead of
public class MainActivity extends Activity
do
public class MainActivity extends AppCompatActivity it supports fragment manager
This will work only if you are using support fragment class i.e. you have to
import android.support.v4.app.Fragment;
I am just starting to learn how to program, so sorry if this is a weird or dumb question.
I am making SlideingScreen using a ViewPager. I copied the code from here (http://developer.android.com/training/animation/screen-slide.html), but I keep getting the errors located here.
Here is the code with the two thingies:
package com.example.ryanfolz.gridgame;
import android.support.v4.app.Fragment;
import android.app.FragmentManager;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.NavUtils;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import android.view.WindowManager;
public class ScreenSlideActivity extends FragmentActivity {
/**
* The number of pages (wizard steps) to show in this demo.
*/
private static final int NUM_PAGES = 5;
/**
* The pager widget, which handles animation and allows swiping horizontally to access previous
* and next wizard steps.
*/
private ViewPager mPager;
/**
* The pager adapter, which provides the pages to the view pager widget.
*/
private PagerAdapter mPagerAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_screen_slide);
// Instantiate a ViewPager and a PagerAdapter.
mPager = (ViewPager) findViewById(R.id.pager);
mPagerAdapter = new ScreenSlidePagerAdapter(getFragmentManager());
mPager.setAdapter(mPagerAdapter);
mPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
//invalidateOptionsMenu();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
getMenuInflater().inflate(R.menu.activity_screen_slide, menu);
menu.findItem(R.id.action_previous).setEnabled(mPager.getCurrentItem() > 0);
// Add either a "next" or "finish" button to the action bar, depending on which page
// is currently selected.
MenuItem item = menu.add(Menu.NONE, R.id.action_next, Menu.NONE,
(mPager.getCurrentItem() == mPagerAdapter.getCount() - 1)
? R.string.action_finish
: R.string.action_next);
item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// Navigate "up" the demo structure to the launchpad activity.
// See http://developer.android.com/design/patterns/navigation.html for more.
NavUtils.navigateUpTo(this, new Intent(this, MainActivity.class));
return true;
case R.id.action_previous:
// Go to the previous step in the wizard. If there is no previous step,
// setCurrentItem will do nothing.
mPager.setCurrentItem(mPager.getCurrentItem() - 1);
return true;
case R.id.action_next:
// Advance to the next step in the wizard. If there is no next step, setCurrentItem
// will do nothing.
mPager.setCurrentItem(mPager.getCurrentItem() + 1);
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A simple pager adapter that represents 5 {#link ScreenSlidePageFragment} objects, in
* sequence.
*/
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
public ScreenSlidePagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
return ScreenSlidePageFragment.create(position);
}
#Override
public int getCount() {
return NUM_PAGES;
}
}
}
The fragment is here
package com.example.ryanfolz.gridgame;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class ScreenSlidePageFragment extends Fragment {
/**
* The argument key for the page number this fragment represents.
*/
public static final String ARG_PAGE = "page";
ViewGroup rootView;
private int mPageNumber;
/**
* Factory method for this fragment class. Constructs a new fragment for the given page number.
*/
public static ScreenSlidePageFragment create(int pageNumber) {
ScreenSlidePageFragment fragment = new ScreenSlidePageFragment();
Bundle args = new Bundle();
args.putInt(ARG_PAGE, pageNumber);
fragment.setArguments(args);
return fragment;
}
public ScreenSlidePageFragment() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPageNumber = getArguments().getInt(ARG_PAGE);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout containing a title and body text.
if(mPageNumber == 1){
rootView = (ViewGroup) inflater
.inflate(R.layout.test, container, false);
((TextView) rootView.findViewById(R.id.test)).setText("Hello");
}else {
rootView = (ViewGroup) inflater
.inflate(R.layout.fragment_screen_slide_page, container, false);
// Set the title view to show the page number.
((TextView) rootView.findViewById(android.R.id.text1)).setText(
getString(R.string.title_template_step, mPageNumber + 1));
}
return rootView;
}
public int getPageNumber() {
return mPageNumber;
}
}
Delete these line from your import
import android.app.FragmentManager;
import android.app.Fragment;
When your IDE ask for which class to import, you should choose these classes from support package instead, like this:
android.support.v4.app.FragmentStatePagerAdapter;
Instead of using getFragmentManager(), you should call getSupportFragmentManager()
I am making SlideingScreen using a ViewPager. I copied the code from here (http://developer.android.com/training/animation/screen-slide.html), but I keep getting the errors
If you check the example properly they have imported
import android.support.v4.app.FragmentManager;
and not
import android.app.FragmentManager;
And also they have used
getSupportFragmentManager()
and not
getFragmentManager()
This changes is required because you are using the android support library for your fragment.
In your ScreenSlideActivity file, change
import android.app.FragmentManager;
to
import android.support.v4.app.FragmentManager;
And for ScreenSlidePageFragment, change this line
import android.app.Fragment;
into this
import android.support.v4.app.Fragment;
At last. Change all
getFragmentManager()
to
getSupportFragmentManager()