Develop Reference

Destroy FragmentStatePagerAdapter instance with parent Fragment

I am not sure how to ask this. I tried in here, but I guess I was not clear enough. So, I thought I just write a small App to describe the situation. Please note, the App uses Googles SlidingTabLayout.
Long story short, at any point if I click Button1, the FrameLayout should contain Fragment1, removing Fragment2 (if exists). Therefore, FragmentViewPager should also be destroyed as Fragment2. However, even then if I change the orientation of my device, I get the Toast which is defined in the onCreate() method of FragmentViewPager.
Why FragmentViewPager's onCreate is called even if Fragment2 is paused/destroyed? Is it possible that, the Toast of FragmentViewPager will not be shown when Fragment2 is destroyed?
MainActivity:
package com.abdfahim.testproject;
import android.app.Fragment;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(onClickListener);
Button button2 = (Button) findViewById(R.id.button2);
button2.setOnClickListener(onClickListener);
}
private View.OnClickListener onClickListener = new View.OnClickListener() {
#Override
public void onClick(View v) {
Fragment fragment;
switch (v.getId()){
case R.id.button1:
fragment = new Fragment1();
break;
case R.id.button2:
fragment = new Fragment2();
break;
default:
return;
}
getFragmentManager().beginTransaction().replace(R.id.frame_container, fragment, v.getTag().toString()).addToBackStack(null).commit();
}
};
}
Fragment1
package com.abdfahim.testproject;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Fragment1 extends Fragment {
public Fragment1(){}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment1,container,false);
setHasOptionsMenu(true);
return rootView;
}
}
Fragment2
package com.abdfahim.testproject;
import android.app.Fragment;
import android.app.FragmentManager;
import android.os.Bundle;
import android.support.v13.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Fragment2 extends Fragment {
public Fragment2(){}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment2,container,false);
setHasOptionsMenu(true);
CharSequence titles[]= {"Tab A", "Tab B"};
// Creating The ViewPagerAdapter
ViewPagerAdapter adapter = new ViewPagerAdapter(getActivity().getFragmentManager(), titles, titles.length);
ViewPager pager = (ViewPager) rootView.findViewById(R.id.pager);
pager.setAdapter(adapter);
// Assigning the Sliding Tab Layout View
SlidingTabLayout tabs = (SlidingTabLayout) rootView.findViewById(R.id.tabs);
// Setting the ViewPager For the SlidingTabsLayout
tabs.setViewPager(pager);
return rootView;
}
static class ViewPagerAdapter extends FragmentStatePagerAdapter {
private CharSequence titles[];
private int numbOfTabs;
public ViewPagerAdapter(FragmentManager fm, CharSequence mTitles[], int mNumbOfTabs) {
super(fm);
this.titles = mTitles;
this.numbOfTabs = mNumbOfTabs;
}
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
#Override
public Fragment getItem(int position) {
Bundle bundle = new Bundle();
bundle.putString("displayText", "Inside Fragment 2, " + titles[position]);
FragmentViewPager fragment = new FragmentViewPager();
fragment.setArguments(bundle);
return fragment;
}
// This method return the titles for the Tabs in the Tab Strip
#Override
public CharSequence getPageTitle(int position) {
return titles[position];
}
// This method return the Number of tabs for the tabs Strip
#Override
public int getCount() {
return numbOfTabs;
}
}
}
FragmentViewPager
package com.abdfahim.testproject;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;
public class FragmentViewPager extends Fragment {
public FragmentViewPager(){}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_view_pager,container,false);
setHasOptionsMenu(true);
Bundle bundle = this.getArguments();
TextView textView = (TextView) rootView.findViewById(R.id.tabText);
textView.setText(bundle.getString("displayText"));
return rootView;
}
#Override
public void onStart() {
super.onStart();
Toast.makeText(getActivity(), "This is View Pager Fragment", Toast.LENGTH_SHORT).show();
}
}

when you use fragment inside another fragment. you use getChildFragmentManager() instead of getFragmentManager. You can call setAdapter() for the ViewPager from onCreateView() or onActivityCreated()
for more detail. have a look at it
Why it is not possible to use ViewPager within a Fragment? It actually is

For every click your OnClickListener creates the instance of Fragment2 and does not create Fragment1. That is due to the misuse of View#getTag.
In MainActivity#onCreate, change the if in the definition of onClickListener to this(using this answer):
switch (v.getId()){
case R.id.button1:
fragment = new Fragment1();
break;
case R.id.button2:
fragment = new Fragment2();
break;
default:
return;
}
In your code, in the if that is checked upon a click (for example after clicking button1) android asks v (the clicked View) for its tag - but as none was set using View#setTag - it returns null which is of course not equal to the String object created for "button1", thus the if reverts to the else every time.

Swipe Left Swipe Right textview in fragment - Android app

Please suggest me how implement Swipe left or right in my app? Is page viewer or gesture can be used. I get content for text view from string array when item clicked. I am new to app development.
My MainActivity xml
import android.app.FragmentTransaction;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.FrameLayout;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener
{
private ActionBarDrawerToggle actionBarDrawerToggle;
private DrawerLayout drawerLayout;
private ListView navList;
private FragmentManager fragmentManager;
boolean nightmode=false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
drawerLayout = (DrawerLayout)findViewById(R.id.drawerlayout);
navList = (ListView)findViewById(R.id.navlist);
String[] versionName = getResources().getStringArray(R.array.version_names);
navList.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, versionName);
navList.setAdapter(adapter);
navList.setOnItemClickListener(this);
actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,R.string.opendrawer,R.string.closedrawer);
drawerLayout.setDrawerListener(actionBarDrawerToggle);
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(true);
fragmentManager = getSupportFragmentManager();
OnSelectionChanged(0);
}
public void OnSelectionChanged(int position) {
DescriptionFragment descriptionFragment = (DescriptionFragment) getFragmentManager()
.findFragmentById(R.id.description_fragment);
if (descriptionFragment != null){
// If description is available, we are in two pane layout
// so we call the method in DescriptionFragment to update its content
descriptionFragment.setDescription(position);
} else {
DescriptionFragment newDesriptionFragment = new DescriptionFragment();
Bundle args = new Bundle();
args.putInt(DescriptionFragment.KEY_POSITION,position);
newDesriptionFragment.setArguments(args);
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
// Replace whatever is in the fragment_container view with this fragment,
// and add the transaction to the backStack so the User can navigate back
fragmentTransaction.replace(R.id.fragment_container,newDesriptionFragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
actionBarDrawerToggle.syncState();
}
#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) {
TextView textElement = (TextView) findViewById(R.id.version_description);
FrameLayout mainLayout = (FrameLayout) findViewById(R.id.fragment_container);
if(nightmode) textElement.setTextColor(Color.WHITE);
switch(item.getItemId()){
case R.id.action_settings:
if (nightmode) {
mainLayout.setBackgroundResource(R.color.white);
textElement.setTextColor(Color.BLACK);
nightmode=false;
}else {
mainLayout.setBackgroundResource(R.color.background_color);
textElement.setTextColor(Color.WHITE);
nightmode=true;
}
break;
case android.R.id.home:
if (drawerLayout.isDrawerOpen(navList)){
drawerLayout.closeDrawer(navList);
}else{
drawerLayout.openDrawer(navList);
}
break;
case R.id.action_share:
break;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
OnSelectionChanged(position);
drawerLayout.closeDrawer(navList);
}
}
My DescriptionFragment
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
/**
* Created by sathi on 16-01-2016.
*/
public class DescriptionFragment extends Fragment {
final static String KEY_POSITION = "position";
int mCurrentPosition = -1;
String[] mVersionDescriptions;
TextView mVersionDescriptionTextView;
public DescriptionFragment(){
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mVersionDescriptions = getResources().getStringArray(R.array.version_descriptions);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
/* DescriptionFragment descriptionFragment = new DescriptionFragment();
Object fromFragment = null;
Object toFragment=null;
descriptionFragment.addFragment(Fragment fromFragment, Fragment toFragment);*/
// If the Activity is recreated, the savedInstanceStare Bundle isn't empty
// we restore the previous version name selection set by the Bundle.
// This is necessary when in two pane layout
if (savedInstanceState != null) {
mCurrentPosition = savedInstanceState.getInt(KEY_POSITION);
}
// FragmentTransaction fragmentTransaction = null;
// fragmentTransaction.setCustomAnimations(R.anim.enter_from_right, R.anim.exit_to_left);
View view = inflater.inflate(R.layout.fragment_description, container, false);
mVersionDescriptionTextView = (TextView) view.findViewById(R.id.version_description);
return view;
/* DescriptionFragment fragment1 = new DescriptionFragment();
(getSupportFragmentManager().beginTransaction().add(R.id.description_fragment, fragment1)
.add(R.id.description_fragment, fragment1).commit()){
}*/
}
public void addFragment(Fragment fromFragment, Fragment toFragment) {
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.add(R.id.fragment_container,toFragment, toFragment.getClass().getName());
transaction.hide(fromFragment);
transaction.addToBackStack(toFragment.getClass().getName());
transaction.commit();
}
public void replaceFragment(Fragment fromFragment, Fragment toFragment) {
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.fragment_container,toFragment, toFragment.getClass().getName());
transaction.hide(fromFragment);
transaction.addToBackStack(toFragment.getClass().getName());
transaction.commit();
}
private FragmentManager getSupportFragmentManager() {
return null;
}
#Override
public void onStart() {
super.onStart();
// During the startup, we check if there are any arguments passed to the fragment.
// onStart() is a good place to do this because the layout has already been
// applied to the fragment at this point so we can safely call the method below
// that sets the description text
Bundle args = getArguments();
if (args != null){
// Set description based on argument passed in
setDescription(args.getInt(KEY_POSITION));
} else if(mCurrentPosition != -1){
// Set description based on savedInstanceState defined during onCreateView()
setDescription(mCurrentPosition);
}
}
public void setDescription(int descriptionIndex){
mVersionDescriptionTextView.setText(mVersionDescriptions[descriptionIndex]);
mCurrentPosition = descriptionIndex;
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
// Save the current description selection in case we need to recreate the fragment
outState.putInt(KEY_POSITION,mCurrentPosition);
}
}

I didn't understand if that actually what you trying to do but as i understood if you want the TextView moves automatically in one line to show the rest of it make this:
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="marquee"
android:focusable="true"
android:focusableInTouchMode="true"
android:freezesText="true"
android:marqueeRepeatLimit="marquee_forever"
android:scrollHorizontally="true"
android:singleLine="true" />
and in code after defining it's view make this:
textView.setChecked(true);

How to add swiping gesture on fragment TAbHost

I want to change tab by swiping on the screen i am creating tabs using fragment tabhost but when i implement swiping feature in my project it doesn't open nested fragment in each tab means i am opening nested child fragment inside each tab.
Please tell me its very important for me.
here is my code.
this my Main activity.
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTabHost;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TextView;
public class Home extends FragmentActivity implements OnTabChangeListener,OnPageChangeListener {
private static final String TAB_1_TAG = "tab_1";
private static final String TAB_2_TAG = "tab_2";
private static final String TAB_3_TAG = "tab_3";
private static final String TAB_4_TAG = "tab_4";
private static final String TAB_5_TAG = "tab_5";
private FragmentTabHost mTabHost;
// ViewPager viewPager;
// TabsPagerAdapter mAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
viewPager =(ViewPager)findViewById(R.id.viewpager);
initView();
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mAdapter);
viewPager.setOnPageChangeListener(Home.this);
}
private void initView() {
mTabHost = (FragmentTabHost)findViewById(android.R.id.tabhost);
mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
// mTabHost.addTab(mTabHost.newTabSpec(TAB_1_TAG).setIndicator("Talk", getResources().getDrawable(R.drawable.ic_launcher)), TalkContainerFragment.class, null);
mTabHost.addTab(mTabHost.newTabSpec(TAB_1_TAG).setIndicator("Talk"), TalkContainerFragment.class, null);
mTabHost.addTab(mTabHost.newTabSpec(TAB_2_TAG).setIndicator("Map"), Map_fragment.class, null);
// mTabHost.addTab(mTabHost.newTabSpec(TAB_3_TAG).setIndicator("Go"), GoContainerFragment.class, null);
// mTabHost.addTab(mTabHost.newTabSpec(TAB_4_TAG).setIndicator("Watch"), WatchContainerFragment.class, null);
// mTabHost.addTab(mTabHost.newTabSpec(TAB_5_TAG).setIndicator("More"), MoreContainerFragment.class, null);
/* Increase tab height programatically
* tabs.getTabWidget().getChildAt(1).getLayoutParams().height = 150;
*/
for (int i = 0; i < mTabHost.getTabWidget().getChildCount(); i++) {
final TextView tv = (TextView) mTabHost.getTabWidget().getChildAt(i).findViewById(android.R.id.title);
if (tv == null)
continue;
else
tv.setTextSize(10);
}
}
#Override
public void onBackPressed() {
boolean isPopFragment = false;
String currentTabTag = mTabHost.getCurrentTabTag();
if (currentTabTag.equals(TAB_1_TAG)) {
isPopFragment = ((BaseContainerFragment)getSupportFragmentManager().findFragmentByTag(TAB_1_TAG)).popFragment();
} else if (currentTabTag.equals(TAB_2_TAG)) {
isPopFragment = ((BaseContainerFragment)getSupportFragmentManager().findFragmentByTag(TAB_2_TAG)).popFragment();
} else if (currentTabTag.equals(TAB_3_TAG)) {
isPopFragment = ((BaseContainerFragment)getSupportFragmentManager().findFragmentByTag(TAB_3_TAG)).popFragment();
} else if (currentTabTag.equals(TAB_4_TAG)) {
isPopFragment = ((BaseContainerFragment)getSupportFragmentManager().findFragmentByTag(TAB_4_TAG)).popFragment();
} else if (currentTabTag.equals(TAB_5_TAG)) {
isPopFragment = ((BaseContainerFragment)getSupportFragmentManager().findFragmentByTag(TAB_5_TAG)).popFragment();
}
if (!isPopFragment) {
finish();
}
}
#Override
public void onTabChanged(String tabId) {
// TODO Auto-generated method stub
int pos = this.mTabHost.getCurrentTab();
this.viewPager.setCurrentItem(pos);
}
#Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
int pos = this.viewPager.getCurrentItem();
this.mTabHost.setCurrentTab(pos);
}
#Override
public void onPageSelected(int arg0) {
// TODO Auto-generated method stub
}
}
This Container fragment class
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.util.Log;
public class BaseContainerFragment extends Fragment {
public void replaceFragment(Fragment fragment, boolean addToBackStack) {
FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
if (addToBackStack) {
transaction.addToBackStack(null);
}
transaction.replace(R.id.container_framelayout, fragment);
transaction.commit();
getChildFragmentManager().executePendingTransactions();
}
public boolean popFragment() {
Log.e("test", "pop fragment: " + getChildFragmentManager().getBackStackEntryCount());
boolean isPop = false;
if (getChildFragmentManager().getBackStackEntryCount() > 0) {
isPop = true;
getChildFragmentManager().popBackStack();
}
return isPop;
}
}
Created Container for each TAb
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class TalkContainerFragment extends BaseContainerFragment {
private boolean mIsViewInited;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.e("test", "tab 1 oncreateview");
return inflater.inflate(R.layout.container_fragment, null);
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Log.e("test", "tab 1 container on activity created");
if (!mIsViewInited) {
mIsViewInited = true;
initView();
}
}
TAlk.java file
import java.util.HashSet;
import java.util.Set;
import org.json.JSONObject;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
public class Talk extends Fragment {
/** Define global variables over here */
//private ProgressDialog pDialog;
// StaticApiList sal;
// TalkModelAll tma;
JSONObject myJasonObject = null;
private ListView lv;
// private ArrayList<TalkModelAll> m_ArrayList = null;
//ArrayList<String> stringArrayList = new ArrayList<String>();
// TalkArrayAdapter taa;
Set<String> uniqueValues = new HashSet<String>();
TextView rowTextView = null;
boolean vivek = false;
int postid;
String title;
String thumsrc;
String largeimg;
String excert;
String description;
String cat;
String myUrl;
String jsonString;
int mCurCheckPosition;
String check_state = null;
String ccc;
LinearLayout myLinearLayout;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.talk, null);
Button btn = (Button) rootView.findViewById(R.id.your_btn_id);
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
//Here TalkDetail is name of class that needs to open
TalkDetail talkfragment = new TalkDetail();
// if U need to pass some data
Bundle bundle = new Bundle();
//
// bundle.putString("title", m_ArrayList.get(arg2).title);
// bundle.putString("largeimg", m_ArrayList.get(arg2).largeimg);
// bundle.putString("excert", m_ArrayList.get(arg2).excert);
// bundle.putString("description", m_ArrayList.get(arg2).description);
// bundle.putString("cat", m_ArrayList.get(arg2).cat);
// //bundle.putInt("postid", m_ArrayList.get(arg2).postid);
talkfragment.setArguments(bundle);
((BaseContainerFragment)getParentFragment()).replaceFragment(talkfragment, true);
}
});
return rootView;
}
}
Talkddetail.class
import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
public class TalkDetail extends android.support.v4.app.Fragment {
/* (non-Javadoc)
* #see android.app.Fragment#onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle)
*/
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view=LayoutInflater.from(getActivity()).inflate(R.layout.activity_talk_detail, null);
return view;
}
}

You have to use a ViewPager. Read more at Android Developer website. You can find a lot of custom view pagers on Android Arsenal. This is the current standard, so you should use this over TabHost.

you can have a look at its demo in eclips go to
file->other->android Activity->tabbed activity
or learn the view Fliper from android developer website
package com.example.mystack;
import java.util.Locale;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.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;
public class MainActivity extends ActionBarActivity 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;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Set up the action bar.
final ActionBar actionBar = getSupportActionBar();
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(
getSupportFragmentManager());
// 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.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();
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) {
switch (position) {
case 0: // Fragment # 0 - This will show FirstFragment
return new TalkContainerFragment(0, "Talk");
case 1: // Fragment # 0 - This will show FirstFragment different title
return new Map_fragment(1, "map");
//Rest of them add here
default:
return null;
}
}
#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_main, container,
false);
return rootView;
}
}
}
and xml is
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.mystack.MainActivity" />
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.mystack.MainActivity$PlaceholderFragment" >
<TextView
android:id="#+id/section_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
Use this method in your activity for all fragment trancation
// For the Fragment Replace And AddtobackStack
void replaceFragment(Fragment fragment) {
String backStateName = fragment.getClass().getName();
String fragmentTag = backStateName;
FragmentManager manager = this.getSupportFragmentManager();
boolean fragmentPopped = manager
.popBackStackImmediate(backStateName, 0);
if (!fragmentPopped && manager.findFragmentByTag(fragmentTag) == null) {
// fragment not in back stack, create it.
FragmentTransaction ft = manager.beginTransaction();
ft.replace(R.id.container, fragment, fragmentTag);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.addToBackStack(backStateName);
ft.commit();
}
}
and use it like this whenever you need to go for nested fragment from one fragmnet
if (DetailsFragment.this.getActivity() != null
&& DetailsFragment.this.getActivity() instanceof HomeActivity)
((HomeActivity) DetailsFragment.this.getActivity())
.replaceFragment(cartfragment);
in the above suppose i am in details fragment and from here i want to go to cartfragment
then get the activitiy instance and cast it like the above

Android save the user input in a several fragments

I want to save the user input of several fragments, i try with the method onSaveInstanceState to save the state and the method onActivityCreated to restore the data, my source is:
package com.example.recepcionauto.app;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
/**
* A simple {#link android.support.v4.app.Fragment} subclass.
*
*/
public class Cliente extends Fragment {
private EditText txtRut;
String rut = null;
public Cliente() { }
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_cliente, container, false);
}
#Override
public void onActivityCreated(Bundle savedState) {
super.onActivityCreated(savedState);
if (savedState != null) {
// Restore last state for checked position.
rut = savedState.getString("rut");
txtRut = (EditText) getActivity().findViewById(R.id.txtRut);
txtRut.setText(rut);
Log.v("Log", "Recuperando del Bundle");
}
}
#Override
public void onSaveInstanceState(Bundle outState) {
outState.putString("rut", rut);
super.onSaveInstanceState(outState);
Log.v("Log", "Guardando en el Bundle");
}
#Override
public void onPause( ) {
Bundle outState = new Bundle( );
outState.putString("rut", rut);
super.onPause();
Log.v("Log", "Se ejecuto onPause( )");
}
}
this is my activity, is a view with listview and fragmentlayout
package com.autocastillo.recepcionauto.app;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.List;
public class Principal extends ActionBarActivity {
private ListView lvMenu;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lvMenu = (ListView) findViewById(R.id.lvMenu);
List<String> lmenu = new ArrayList<String>();
lmenu.add("Cliente");
lmenu.add("Vehiculo");
lmenu.add("Conductor");
lmenu.add("Accesorios");
lmenu.add("Resumen");
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction transaction = fm.beginTransaction();
Fragment startFragment = new Cliente( );
transaction.add(R.id.myFragment,startFragment);
transaction.commit();
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,lmenu );
lvMenu.setAdapter(arrayAdapter);
lvMenu.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
//Toast.makeText(Principal.this, "You Clicked at " + i, Toast.LENGTH_SHORT).show();
Fragment newFragment=null;
switch (i){
case 0:{
//Toast.makeText(Principal.this, "Cliente " + i, Toast.LENGTH_SHORT).show();
newFragment = new Cliente( );
break;
}
case 1:{
newFragment = new Vehiculo( );
break;
}
}
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.myFragment,newFragment);
transaction.addToBackStack(null);
transaction.commit();
Log.v("Prueba", "llamo a itemclick");
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onSaveInstanceState(Bundle outState) {
Log.v("Log", "Guardando en el Bundle");
}
#Override
protected void onRestoreInstanceState(Bundle inState) {
}
}
What is wrong?, the onSaveInstanceState not work, i try with putSerialize and nothing, please i appreciate your cooperation

If what you want to save is the Fragment state as is, take a look at this other answer, which is more an explanation than an example. You should be using the putFragment and getFragment methods from your getSupportFragmentManager() instance.
I recognize I've been a little late using these two bad boys on my own, but they're quite useful. Let me give you a hint on where to add them:
putFragment
Inside your Principal activity, add this directly in your onSaveInstanceState method. One call per fragment you want to save:
public void onSaveInstanceState(Bundle outState) {
Cliente fragment = getSupportFragmentManager().findFragmentById(R.id.myFragment);
getSupportFragmentManager().putFragment(outState, "cliente", fragment);
}
getFragment
You can (and should, actually) use getFragment inside the onCreate. Use the already passed savedInstanceState variable, and slightly change the way you init the fragment:
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction transaction = fm.beginTransaction();
Fragment startFragment = null;
if(savedInstanceState == null) { // first open
startFragment = new Cliente( );
} else { // rotation, change where the fragment was already there
startFragment = fm.getFragment(savedInstanceState, "cliente");
}
transaction.add(R.id.myFragment,startFragment);
transaction.commit();

Using SherlockFragmentActivity works in newer android phone but not older model

so I have tested this code on a newer android and when I test it on an older version and click on a button to take me to a page with SwipeView and tabs, I get an error:
The application has stopped unexpectedly. Please try again.
I have set the minimumSDK level in the android manifest to 7. I'm not sure why it won't work on the older android phone.
Here's my code for the SwipeView class:
import com.actionbarsherlock.app.SherlockFragmentActivity;
import com.actionbarsherlock.view.MenuItem;
import android.app.ActionBar;
import android.content.Intent;
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.FragmentStatePagerAdapter;
import android.support.v4.app.NavUtils;
import android.support.v4.app.TaskStackBuilder;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class SwipeMode extends SherlockFragmentActivity{
DemoCollectionPagerAdapter mDemoCollectionPagerAdapter;
ViewPager mViewPager;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.swipemode);
mDemoCollectionPagerAdapter = new DemoCollectionPagerAdapter(getSupportFragmentManager());
// Set up action bar.
final ActionBar actionBar = getActionBar();
// Specify that the Home button should show an "Up" caret, indicating that touching the
// button will take the user one step up in the application's hierarchy.
actionBar.setDisplayHomeAsUpEnabled(true);
// Set up the ViewPager, attaching the adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mDemoCollectionPagerAdapter);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// This is called when the Home (Up) button is pressed in the action bar.
// Create a simple intent that starts the hierarchical parent activity and
// use NavUtils in the Support Package to ensure proper handling of Up.
Intent upIntent = new Intent(this, MainActivity.class);
if (NavUtils.shouldUpRecreateTask(this, upIntent)) {
// This activity is not part of the application's task, so create a new task
// with a synthesized back stack.
TaskStackBuilder.from(this)
// If there are ancestor activities, they should be added here.
.addNextIntent(upIntent)
.startActivities();
finish();
} else {
// This activity is part of the application's task, so simply
// navigate up to the hierarchical parent activity.
NavUtils.navigateUpTo(this, upIntent);
}
return true;
}
return super.onOptionsItemSelected(item);
}
public static class DemoCollectionPagerAdapter extends FragmentStatePagerAdapter {
public DemoCollectionPagerAdapter(FragmentManager fm) {
super(fm);
}
//unimplemented methods were automatically added
#Override
public Fragment getItem(int i) {
// TODO Auto-generated method stub
Fragment fragment = new DemoObjectFragment();
Bundle args = new Bundle();
args.putInt(DemoObjectFragment.ARG_OBJECT, i + 1); // Our object is just an integer :-P
fragment.setArguments(args);
return fragment;
}
//number of pages
#Override
public int getCount() {
// TODO Auto-generated method stub
return 5;
}
#Override
public CharSequence getPageTitle(int position) {
return "OBJECT " + (position + 1);
}
}
public static class DemoObjectFragment extends Fragment {
public static final String ARG_OBJECT = "object";
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.text_object, container, false);
Bundle args = getArguments();
//This part sets the integer to string text on the layouts
((TextView) rootView.findViewById(android.R.id.text1)).setText(
Integer.toString(args.getInt(ARG_OBJECT)));
return rootView;
}
}
}

Use getSupportActionBar() instead of getActionBar().
getActionBar() is supported from API lvl 11+