Pass information between two fragments

Pass information between two fragments - android

import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
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.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.ImageView;
import java.util.ArrayList;
import java.util.List;
public class ImagenesAlumnoActivity 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_imagenes_alumno);
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);
}
public int getScreenWidth() {
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int width=dm.widthPixels;
return width;
}
#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_imagenes_alumno, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.ajustes:
Intent ajuste = new Intent(ImagenesAlumnoActivity.this, AjusteActivity.class);
Bundle b = getIntent().getExtras();
String id = b.getString("id");
ajuste.putExtra("id",id);
startActivity(ajuste);
return true;
case R.id.modo_alumno:
Intent intent = new Intent(ImagenesAlumnoActivity.this, ModoAlumnoActivity.class);
Bundle b1 = getIntent().getExtras();
String nombre = b1.getString("alumno");
String id1 = b1.getString("id");
intent.putExtra("alumno", nombre);
intent.putExtra("id", id1);
startActivity(intent);
return true;
default:
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";
private GridViewImageAdapter adapter1;
public GridView gridView;
private int anchoColumna;
private List<Imagen> imagenes = new ArrayList<Imagen>();
MediaPlayer player;
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_imagenes_edicion, container, false);
ArrayList<Imagen> imagenesParaMostrar = new ArrayList<Imagen>();
gridView = (GridView) rootView.findViewById(R.id.grid_view);
double mult = 0.8;
inicializarGrilla(Constantes.CANTIDAD_COLUMNAS, Constantes.PADDING_GRILLA, gridView, mult);
int position = this.getArguments().getInt(ARG_SECTION_NUMBER);
imagenesParaMostrar.clear();
for (Imagen imagen : Datos.imagenes){
if ((imagen.getCategoria()) == position ) {
imagenesParaMostrar.add(imagen);
}
}
adapter1 = new GridViewImageAdapter(this.getActivity(),imagenesParaMostrar,anchoColumna);
gridView.setAdapter(adapter1);
return rootView;
}
private void inicializarGrilla(int cantidadColumnas, int paddingGrilla, GridView gv, double mult) {
anchoColumna = (int) (((this.getScreenWidth()* mult) - ((cantidadColumnas + 1) * paddingGrilla)) /cantidadColumnas);
gv.setNumColumns(cantidadColumnas);
gv.setColumnWidth(anchoColumna);
gv.setStretchMode(GridView.STRETCH_COLUMN_WIDTH);
gv.setPadding(paddingGrilla, paddingGrilla, paddingGrilla, paddingGrilla);
gv.setHorizontalSpacing(paddingGrilla);
gv.setVerticalSpacing(paddingGrilla);
gv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
Imagen imagen = (Imagen) gridView.getAdapter().getItem(position);
player = MediaPlayer.create(getActivity(), imagen.getSonido());
player.start();
}
});
}
public int getScreenWidth() {
DisplayMetrics displaymetrics = new DisplayMetrics();
getActivity().getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
int height = displaymetrics.heightPixels;
int width = displaymetrics.widthPixels;
return width;
}
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
Bundle b = getIntent().getExtras();
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);
}
#Override
public int getCount() {
// Show 4 total pages.
return 5;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "PISTA";
case 1:
return "ESTABLO";
case 2:
return "EMOCIONES";
case 3:
return "NECESIDADES";
case 4:
return b.getString("alumno");
}
return null;
}
}
public void loadBitmap(int resId, ImageView imageView) {
BitmapWorkerTask task = new BitmapWorkerTask(imageView, getResources());
task.execute(resId);
}
}
I have diferents fragments with diferents images inside. I want to click one image and send it to another fragment. I saw a lot of solutions, using the Otto library would be easy. But in this case I use SectionsPagerAdapter that extends from FragmentPagerAdapter and I can't understand how to do it. Please help! Thanks

I would recommend creating an Interface that calls back from your first Fragment to the parent Activity and passes the data you want to forward to the second Fragment. Then within the callback on the parent Activity, find your second Fragment by its tag and call a public method within the second Fragment that updates its UI with the forwarded data.
See the docs for explanation of how to do this:
http://developer.android.com/training/basics/fragments/communicating.html

you can use a static class this. first(in fragment 1 ) pass value to fields of this class and in second fragment you can use it.

Related

Adding an Fragment id to auto-generated fragment from android studio

I have created auto generated fragment from Android Studio.
When i do an
TagDataFragment fragment = (TagDataFragment) getSupportFragmentManager().findFragmentById(R.id.tagFragment);
fragment.fillValues();
fragment returns null. I have googled and found id is not added to Fragment. How and where do i add the fragment id .
import android.support.design.widget.TabLayout;
import android.support.v4.app.FragmentTransaction;
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.EditText;
import android.widget.TextView;
public class MainActivity 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_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
TagDataFragment fragment = (TagDataFragment) getSupportFragmentManager().findFragmentById(R.id.tagFragment);
fragment.fillValues();
return true;
}
return super.onOptionsItemSelected(item);
}
public void fillValues(MenuItem 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_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;
}
}
/**
* 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 index) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
switch (index) {
case 0:
// Top Rated fragment activity
return new TagDataFragment();
case 1:
// Games fragment activity
return new TagDataFragment();
}
return null;
}
#Override
public int getCount() {
// Show 3 total pages.
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "SECTION 1";
case 1:
return "SECTION 2";
}
return null;
}
}
}

FragmentListView with Actionbar Tabs and Pager

I am attempting to get a list fragment working within the template generated by android studio for tabs and swiping between them.
The symptoms are that the fragment gets executed once at the start of the activity but never again if the tab is changed.
It never shows up contents (whether start of activity or otherwise).
The boilerplate code is as so:
package com.responseapp.android.activity;
import java.util.Locale;
import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.support.v13.app.FragmentPagerAdapter;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
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.widget.TextView;
import com.responseapp.android.R;
public class TestActivity extends Activity implements ActionBar.TabListener {
/**
* 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.v13.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test2);
// Set up the action bar.
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// When swiping between different sections, select the corresponding
// tab. We can also use ActionBar.Tab#select() to do this if we have
// a reference to the Tab.
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by
// the adapter. Also specify this Activity object, which implements
// the TabListener interface, as the callback (listener) for when
// this tab is selected.
actionBar.addTab(
actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.test, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in
// the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
/**
* 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) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
case 2:
return getString(R.string.title_section3).toUpperCase(l);
}
return null;
}
}
/**
* 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_test2, container, false);
return rootView;
}
}
}
I have done the following to little success:
package com.responseapp.android.ui;
import android.app.ActionBar;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v13.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import com.activeandroid.ActiveAndroid;
import com.responseapp.android.R;
import com.responseapp.android.model.Trip;
import com.responseapp.android.ui.authorisation.LoginActivity;
import com.responseapp.android.ui.trips.CreateTripActivity;
import java.util.Locale;
import uk.co.senab.actionbarpulltorefresh.library.ActionBarPullToRefresh;
import uk.co.senab.actionbarpulltorefresh.library.PullToRefreshLayout;
public class HomeActivity extends Activity implements ActionBar.TabListener {
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {#link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {#link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
private static final String STATE_SELECTED_NAVIGATION_ITEM = "selected_navigation_item";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
ActiveAndroid.initialize(this);
SharedPreferences sharedPref = getSharedPreferences("com.responseapp.app.SHARED", 0);
boolean loggedIn = sharedPref.getBoolean("LOGGED_IN", false);
if (!loggedIn) {
Intent intent = new Intent(this, LoginActivity.class);
startActivity(intent);
finish();
}
// Set up the action bar.
final ActionBar actionBar = getActionBar();
if (actionBar != null) {
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
}
// Create the adapter that will return a fragment for each of the
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
getActionBar().setTitle("Response");
// When swiping between different sections, select the corresponding
// tab. We can also use ActionBar.Tab#select() to do this if we have
// a reference to the Tab.
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
if (actionBar != null) {
actionBar.setSelectedNavigationItem(position);
}
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by
// the adapter. Also specify this Activity object, which implements
// the TabListener interface, as the callback (listener) for when
// this tab is selected.
actionBar.addTab(
actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.home, menu);
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();
if (id == R.id.action_logout) {
SharedPreferences sharedPref = getSharedPreferences("com.responseapp.app.SHARED", 0);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putBoolean("LOGGED_IN", false);
editor.commit();
Intent intent = new Intent(this, LoginActivity.class);
startActivity(intent);
finish();
return true;
}
if (id == R.id.action_new_trip) {
Intent intent = new Intent(this, CreateTripActivity.class);
startActivity(intent);
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* Called when a tab enters the selected state.
*
* #param tab The tab that was selected
* #param ft A {#link android.app.FragmentTransaction} for queuing fragment operations to execute
* during a tab switch. The previous tab's unselect and this tab's select will be
* executed in a single transaction. This FragmentTransaction does not support
*/
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
mViewPager.setCurrentItem(tab.getPosition());
System.out.println("FRAGMENT TAPPED!");
}
/**
* Called when a tab exits the selected state.
*
* #param tab The tab that was unselected
* #param ft A {#link android.app.FragmentTransaction} for queuing fragment operations to execute
* during a tab switch. This tab's unselect and the newly selected tab's select
* will be executed in a single transaction. This FragmentTransaction does not
*/
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
/**
* Called when a tab that is already selected is chosen again by the user.
* Some applications may use this action to return to the top level of a category.
*
* #param tab The tab that was reselected.
* #param ft A {#link android.app.FragmentTransaction} for queuing fragment operations to execute
* once this method returns. This FragmentTransaction does not support
*/
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
/**
* 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) {
String type = position == 0 ? "all" : "managed";
System.out.println("GOT THIS FAR");
return TripListFragment.newInstance(type);
}
#Override
public int getCount() {
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.all_trips_title).toUpperCase(l);
case 1:
return getString(R.string.managed_trips_title).toUpperCase(l);
}
return null;
}
}
/**
* A trip list fragment containing a simple view.
*/
public static class TripListFragment extends Fragment implements AdapterView.OnItemClickListener {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_TYPE = "all";
/**
* The fragment's ListView/GridView.
*/
private AbsListView mListView;
/**
* The Adapter which will be used to populate the ListView/GridView with
* Views.
*/
private ListAdapter mAdapter;
private PullToRefreshLayout mPullToRefreshLayout;
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static TripListFragment newInstance(String sectionType) {
TripListFragment fragment = new TripListFragment();
Bundle args = new Bundle();
args.putString(ARG_SECTION_TYPE, sectionType);
fragment.setArguments(args);
return fragment;
}
public TripListFragment() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
System.out.println("BEING CALLED");
if(ARG_SECTION_TYPE == "all") {
mAdapter = new ArrayAdapter<Trip.TripItem>(getActivity(),
android.R.layout.two_line_list_item, android.R.id.text1, Trip.getAllAsItems(0));
} else {
mAdapter = new ArrayAdapter<Trip.TripItem>(getActivity(),
android.R.layout.two_line_list_item, android.R.id.text1, Trip.getManagedAsItems(0));
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_triplist, container, false);
mPullToRefreshLayout = new PullToRefreshLayout(container.getContext());
// Set the adapter
mListView = (AbsListView) view.findViewById(android.R.id.list);
mListView.setAdapter(mAdapter);
// Set OnItemClickListener so we can be notified on item clicks
mListView.setOnItemClickListener(this);
System.out.println("VIEW:"+view.toString());
return view;
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Trip.TripItem trip = (Trip.TripItem) parent.getItemAtPosition(position);
HomeActivity.onFragmentInteraction(1, trip.id);
}
}
private static void onFragmentInteraction(int i, int id) {
}
}
The difference being the fragment class embedded in the main class.
In the boilerplate:
/**
* 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_test2, container, false);
return rootView;
}
}
In my code:
/**
* A trip list fragment containing a simple view.
*/
public static class TripListFragment extends Fragment implements AdapterView.OnItemClickListener {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_TYPE = "all";
/**
* The fragment's ListView/GridView.
*/
private AbsListView mListView;
/**
* The Adapter which will be used to populate the ListView/GridView with
* Views.
*/
private ListAdapter mAdapter;
private PullToRefreshLayout mPullToRefreshLayout;
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static TripListFragment newInstance(String sectionType) {
TripListFragment fragment = new TripListFragment();
Bundle args = new Bundle();
args.putString(ARG_SECTION_TYPE, sectionType);
fragment.setArguments(args);
return fragment;
}
public TripListFragment() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
System.out.println("BEING CALLED");
if(ARG_SECTION_TYPE == "all") {
mAdapter = new ArrayAdapter<Trip.TripItem>(getActivity(),
android.R.layout.two_line_list_item, android.R.id.text1, Trip.getAllAsItems(0));
} else {
mAdapter = new ArrayAdapter<Trip.TripItem>(getActivity(),
android.R.layout.two_line_list_item, android.R.id.text1, Trip.getManagedAsItems(0));
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_triplist, container, false);
mPullToRefreshLayout = new PullToRefreshLayout(container.getContext());
// Set the adapter
mListView = (AbsListView) view.findViewById(android.R.id.list);
mListView.setAdapter(mAdapter);
// Set OnItemClickListener so we can be notified on item clicks
mListView.setOnItemClickListener(this);
System.out.println("VIEW:"+view.toString());
return view;
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Trip.TripItem trip = (Trip.TripItem) parent.getItemAtPosition(position);
HomeActivity.onFragmentInteraction(1, trip.id);
}
}
Any help would be greatly appreciated.

Application won't start

For some reason, the project that I've just begun, seems to get on my nerves. I obviously don't know why, my application won't run. Here's my MainActivity's code:
package com.example.testarearg;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class MainActivity extends FragmentActivity {
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {#link android.support.v4.app.FragmentPagerAdapter} derivative, which
* will keep every loaded fragment in memory. If this becomes too memory
* intensive, it may be best to switch to a
* {#link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by
// the adapter. Also specify this Activity object, which implements
// the TabListener interface, as the callback (listener) for when
// this tab is selected.
}
}
/**
* 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 DummySectionFragment (defined as a static inner class
// below) with the page number as its lone argument.
Fragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
fragment.setArguments(args);
return fragment;
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
}
/**
* A dummy fragment representing a section of the app, but that simply
* displays dummy text.
*/
public static class DummySectionFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/ private String mText; // display this text in your fragment
public static Fragment getInstance(String text) {
Fragment f = new Fragment();
Bundle args = new Bundle();
args.putString("text", text);
f.setArguments(args);
return f;
}
public void onCreate(Bundle state) {
super.onCreate(state);
setmText(getArguments().getString("text"));
// rest of your code
}
public static final String ARG_SECTION_NUMBER = "section_number";
public DummySectionFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_dummy, container, false);
TextView dummyTextView = (TextView) rootView.findViewById(R.id.section_label);
dummyTextView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
public String getmText() {
return mText;
}
public void setmText(String mText) {
this.mText = mText;
}
}
}
And here's a screenshot of my logcat's log. http://s23.postimg.org/imxwv32ez/5555.jpg

You have a NullPointerException at this line :
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
because mSectionsPagerAdapter is never initialized in your code

The problem is NullPointerException. mSectionsPagerAdapter is null. You need to initialize it before using.

mSectionsPagerAdapter.getCount()
Returns null as you never initialized mSectionsPagerAdapter to anything

Android change Fragment page

you can download my zip here
ok so i made an app with Swipe+Tab View i want each tab to show a diffrent .xml page if u click above you can download my workspace to edit it .. i really need help please be spicific to if u want i can setup teamviwer if it could be faster.. if u dont want to download the file cause u think "it has a virus" just make a reply down below here is my code for the mainactivity.java
package twh.reviser.root;
import java.util.Locale;
import android.os.Bundle;
import android.renderscript.Int2;
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.app.NavUtils;
import android.support.v4.view.ViewPager;
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.widget.TextView;
public class MainActivity extends FragmentActivity {
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {#link android.support.v4.app.FragmentPagerAdapter} derivative, which
* will keep every loaded fragment in memory. If this becomes too memory
* intensive, it may be best to switch to a
* {#link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Create the adapter that will return a fragment for each of the three
// primary sections of the app.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
#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;
}
/**
* 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 DummySectionFragment (defined as a static inner class
// below) with the page number as its lone argument.
Fragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
fragment.setArguments(args);
return fragment;
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
case 2:
return getString(R.string.title_section3).toUpperCase(l);
}
return null;
}
}
/**
* A dummy fragment representing a section of the app, but that simply
* displays dummy text.
*/
public static class DummySectionFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
public static final String ARG_SECTION_NUMBER = "section_number";
public DummySectionFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_dummy, container, false);
TextView dummyTextView = (TextView) rootView.findViewById(R.id.section_label);
dummyTextView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
}
}

Here is an example of my adapter that solves your problem. TabsPagerAdapter is just separate class.
/**
* This is a helper class that implements the management of tabs and all
* details of connecting a ViewPager with associated TabHost. It relies on a
* trick. Normally a tab host has a simple API for supplying a View or
* Intent that each tab will show. This is not sufficient for switching
* between pages. So instead we make the content part of the tab host
* 0dp high (it is not shown) and the TabsAdapter supplies its own dummy
* view to show as the tab content. It listens to changes in tabs, and takes
* care of switch to the correct paged in the ViewPager whenever the selected
* tab changes.
*/
public class TabsPagerAdapter extends FragmentPagerAdapter implements TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener{
private final Context mContext;
private final TabHost mTabHost;
private final ViewPager mViewPager;
private final OnPageChangeListener mListener;
private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
private final FragmentManager mFragmentManager;
static final class TabInfo {
private final String tag;
private final Class<?> clss;
private final Bundle args;
TabInfo(String _tag, Class<?> _class, Bundle _args) {
tag = _tag;
clss = _class;
args = _args;
}
}
static class DummyTabFactory implements TabHost.TabContentFactory {
private final Context mContext;
public DummyTabFactory(Context context) {
mContext = context;
}
#Override
public View createTabContent(String tag) {
View v = new View(mContext);
v.setMinimumWidth(0);
v.setMinimumHeight(0);
return v;
}
}
public void addTab(String label, String tag, Drawable drawable, Class<?> c, int resourse) {
addTab(this.mContext, label, tag, drawable, c, resourse);
}
public void addTab(Context context, String label, String tag, Drawable drawable, Class<?> c, int resourse) {
Intent intent = new Intent(context, c);
TabHost.TabSpec spec = mTabHost.newTabSpec(tag);
View tabIndicator = LayoutInflater.from(context).inflate(resourse, (TabWidget)mTabHost.findViewById(android.R.id.tabs), false);
ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);
icon.setImageDrawable(drawable);
icon.setScaleType(ImageView.ScaleType.FIT_CENTER);
spec.setIndicator(tabIndicator);
spec.setContent(intent);
this.addTab(spec, c, null);
}
public TabsPagerAdapter(FragmentActivity activity, TabHost tabHost, ViewPager pager, OnPageChangeListener listener, FragmentManager manager) {
super(manager);
mFragmentManager = manager;
mContext = activity;
mTabHost = tabHost;
mViewPager = pager;
mListener = listener;
mTabHost.setOnTabChangedListener(this);
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(TabHost.TabSpec tabSpec, Class<?> clss, Bundle args) {
tabSpec.setContent(new DummyTabFactory(mContext));
String tag = tabSpec.getTag();
TabInfo info = new TabInfo(tag, clss, args);
mTabs.add(info);
mTabHost.addTab(tabSpec);
notifyDataSetChanged();
}
#Override
public int getCount() {
return mTabs.size();
}
#Override
public CharSequence getPageTitle (int position){
}
public Fragment getCurrentFragment() {
return getFragmentAt(mTabHost.getCurrentTab());
}
public Fragment getFragmentAt(int position){
return mFragmentManager.findFragmentByTag("android:switcher:" + mViewPager.getId() + ":" + position);
}
#Override
public Fragment getItem(int position) {
TabInfo info = (TabInfo) mTabs.get(position);
return Fragment.instantiate(mContext, info.clss.getName(), info.args);
}
#Override
public void onTabChanged(String tabId) {
//called when the user clicks on a tab.
int position = mTabHost.getCurrentTab();
if(mViewPager.getCurrentItem() != position){
mViewPager.setCurrentItem(position);
}
}
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if(mListener!=null){
mListener.onPageScrolled(position, positionOffset, positionOffsetPixels);
}
}
#Override
public void onPageSelected(int position) {
// Unfortunately when TabHost changes the current tab, it kindly
// also takes care of putting focus on it when not in touch mode.
// The jerk.
// This hack tries to prevent this from pulling focus out of our
// ViewPager.
TabWidget widget = mTabHost.getTabWidget();
int oldFocusability = widget.getDescendantFocusability();
widget.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
mTabHost.setCurrentTab(position);
widget.setDescendantFocusability(oldFocusability);
if(mListener!=null){
mListener.onPageSelected(position);
}
}
#Override
public void onPageScrollStateChanged(int state) {
if(mListener!=null){
mListener.onPageScrollStateChanged(state);
}
}
}
This is android example framentadapter with tiny modifications.
Example usage
MainActivity.java
class MainActivity extends FragmentActivuty{
public void onCreate(Bundle savedInstanceState){
setContentView(R.layout.activity_main);
mTabHost = (TabHost) findViewById(android.R.id.tabhost);
mTabHost.setup();
mViewPager = (ViewPager) findViewById(R.id.pager);
mTabsAdapter = new TabsPagerAdapter(this, mTabHost, mViewPager,null, getSupportFragmentManager());
mTabsAdapter.addTab("Button", "button",getResources().getDrawable(R.drawable.yourdrawable),
ButtonFragment.class, R.layout.yourtablayout);
mTabsAdapter.addTab("Text","text",getResources().getDrawable(R.drawable.yourdrawable), TextFragment.class, R.layout.yourtablayout);
//This is needed so your tabs do not reload each time
mViewPager.setOffscreenPageLimit(mTabsAdapter.getCount());
}

I integrated some code that I wrote with the code you provided. I think this should work, based upon you having used the generic Android ADT setup.
package twh.reviser.root;
import java.util.Locale;
import android.os.Bundle;
import android.renderscript.Int2;
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.app.NavUtils;
import android.support.v4.view.ViewPager;
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.widget.TextView;
public class MainActivity extends FragmentActivity {
static final int NUM_ITEMS = 3;
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {#link android.support.v4.app.FragmentPagerAdapter} derivative, which
* will keep every loaded fragment in memory. If this becomes too memory
* intensive, it may be best to switch to a
* {#link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Create the adapter that will return a fragment for each of the three
// primary sections of the app.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
/** possibly missing from your code*/
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
actionBar.addTab(actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
#Override
public void onTabSelected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in
// the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabReselected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
}
#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;
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
Context c;
public SectionsPagerAdapter(Context c,FragmentManager fm) {
super(fm);
this.c = c;
}
#Override
public Fragment getItem(int position) {
Fragment fragment = null;
if (position == 0) {
fragment = new FragmentPage1(c);
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
fragment.setArguments(args);
}
if (position == 1) {
fragment = new FragmentPage2(c);
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
fragment.setArguments(args);
}
if (position == 2) {
fragment = new FragmentPage3(c);
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
fragment.setArguments(args);
}
return fragment;
}
#Override
public int getCount() {
// Show 3 total pages.
return NUM_ITEMS;
}
#Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
case 2:
return getString(R.string.title_section3).toUpperCase(l);
}
return null;
}
}
/**
* A dummy fragment representing a section of the app, but that simply
* displays dummy text.
*/
public static class DummySectionFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
public static final String ARG_SECTION_NUMBER = "section_number";
public DummySectionFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_dummy, container, false);
TextView dummyTextView = (TextView) rootView.findViewById(R.id.section_label);
dummyTextView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
}
}
Create three xml files for each of the three fragments in res/layout/
Fragment_1.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin" >
<TextView
android:id="#+id/textview1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
Fragment_2.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin" >
<TextView
android:id="#+id/textview1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
Fragment_3.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin" >
<TextView
android:id="#+id/textview1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
Create three java files for the three fragments in src/twh.reviser.root
FragmentPage1.java
package twh.reviser.root;
public class FragmentPage1 extends Fragment {
Context c;
public FragmentInputPage1(){
}
public FragmentInputPage1(Context c) {
this.c = c;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.Fragment_1, null);
return v;
}
}
FragmentPage2.java
package twh.reviser.root;
public class FragmentPage2 extends Fragment {
Context c;
public FragmentInputPage2(){
}
public FragmentInputPage2(Context c) {
this.c = c;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.Fragment_2, null);
return v;
}
}
FragmentPage3.java
package twh.reviser.root;
public class FragmentPage3 extends Fragment {
Context c;
public FragmentInputPage3(){
}
public FragmentInputPage3(Context c) {
this.c = c;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.Fragment_3, null);
return v;
}
}
If you want to get the value of an id from another fragment you can use the below, based upon FragmentPage1 having the following public variables declared
public static String a,b,c;
Within FragmentPage1.java
public class FragmentPage3 extends Fragment {
Context c;
String a = "";
String b = "";
String c = "";
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.Fragment_3, null);
a = FragmentPage1.a;
b = FragmentPage1.b;
c = FragmentPage1.c;

Implementing Swipe + Tiles Navigation view android

My First App
I am trying to use Swipe + Tiles Navigation in android . I want to show a different string on each fragment / or tile . I used switch case to use a different string based on int position . The app checked out with no errors but keeps on crashing when i run it . Tried using if else but now i am stuck . Help would be deeply appreciated .
MainActivity.java
package com.example.swipetile;
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.app.NavUtils;
import android.support.v4.view.ViewPager;
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.widget.TextView;
public class MainActivity extends FragmentActivity {
int position; // Setting global variables .. trying to solve the issue at the end
String ARG_SECTION_NUMBER;
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Create the adapter that will return a fragment for each of the three
// primary sections of the app.
mSectionsPagerAdapter = new SectionsPagerAdapter(
getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
/**
* 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 DummySectionFragment (defined as a static inner class
// below) with the page number as its lone argument.
Fragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 5);
fragment.setArguments(args);
return fragment;
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase();
case 1:
return getString(R.string.title_section2).toUpperCase();
case 2:
return getString(R.string.title_section3).toUpperCase();
}
return null;
}
}
/**
* A dummy fragment representing a section of the app, but that simply
* displays dummy text.
*/
public static class DummySectionFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
public static final String ARG_SECTION_NUMBER = "section_number";
public DummySectionFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Create a new TextView and set its text to the fragment's section
// number argument value.
TextView textView = new TextView(getActivity());
textView.setGravity(Gravity.CENTER);
/*
textView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
return textView;
*/
// Original Procedure
/*
textView.setText(Integer.toString(getArguments().getInt(
ARG_SECTION_NUMBER))); return textView;
*/
// public CharSequence getPageTitle(int position)
CharSequence getItem(int position) {
if (position == 0) {
textView.setText(getString(R.string.hello_world));
return textView;
} else if (position == 1) {
textView.setText(getString(R.string.hello_world));
return textView;
} else if (position == 2) {
textView.setText(getString(R.string.hello_world));
return textView;
} else if (position == 3) {
textView.setText(getString(R.string.hello_world));
return textView;
} else {
textView.setText(getString(R.string.hello_world));
return textView;
}
// the one that had no errors but closed
/*
int position = Integer.parseInt(ARG_SECTION_NUMBER);
switch (position)
{
case 1:
textView.setText(getString(R.string.hello_world));
return textView;
case 2:
textView.setText(getString(R.string.hello_world));
return textView;
case 3:
textView.setText(getString(R.string.hello_world));
return textView;
default:
textView.setText(getString(R.string.hello_world));
return textView;
}
*/
/*textView.setText(getString(R.string.hello_world));
return textView;
*/
}
}
}
I am tried commenting out the position int at the top and the string ARG_SECTION_NUMBER;
and then tried using the switch statement .. same result .. no error .. app just dies when i run it .
LOGCAT ERROR SHOT
http://tinypic.com/r/1zmgo55/5
Thanks in advance

You are trying to parse ARG_SECTION_NUMBER in to an Integer which is a string.
If you are using eclipse, you can check for the exception logs in Logcat.
Window > Show View > Other > Logcat
EDIT:-
You are getting NumberFormatException because of ARG_SECTION_NUMBER.
add these lines in onCreateView() of DummySectionFragment
Bundle bundle=getArguments();
int position = bundle.getInt(ARG_SECTION_NUMBER);

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