switching android map fragment -- crashed

switching android map fragment -- crashed - android

In my application I have two tab (map and nearby). Both fragments are using map fragment.
Here is my map.xml
<RelativeLayout
android:id="#+id/countryLayout"
android:layout_below="#id/partnersLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/mainFooterLayout">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.google.android.gms.maps.MapFragment"/>
</FrameLayout>
</RelativeLayout>
Here is my inflated code
View view = inflater.inflate(R.layout.map, container, false);
and in NearbyFragment and MyMapFragment I called
public void onDestroyView() {
super.onDestroyView();
Fragment fragment = (getFragmentManager().findFragmentById(R.id.map));
FragmentTransaction ft = mActivity.getFragmentManager().beginTransaction();
ft.remove(fragment);
ft.commit();
}
but still my application crashed
I have this exception
Caused by: java.lang.IllegalArgumentException: Binary XML file line #42: Duplicate id 0x7f0600b5, tag null, or parent id 0xffffffff with another fragment for com.google.android.gms.maps.MapFragment
Could anyone tell me what is wrong here?
Is it possible that I use MapFragment instead of SupportMapFragment?
Thank you

See what you should do:
1) Define activity layout:
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
2) Create adapter for your tabulated pager:
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Context;
import android.support.v13.app.FragmentPagerAdapter;
public class SectionsPagerAdapter extends FragmentPagerAdapter {
List<Fragment> mValues = new ArrayList<Fragment>();
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
// HERE YOU ADD INSTANCES OF FRAGMENTS WHAT YOU NEED
mValues.add(new com.google.android.gms.maps.MapFragment());
mValues.add(new com.google.android.gms.maps.MapFragment());
}
#Override
public Fragment getItem(int position) {
return PlaceholderFragment.newInstance(position + 1);
}
#Override
public int getCount() {
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Map";
case 1:
return "Nearby";
}
return null;
}
}
3) Create main activity with tabs
import android.app.ActionBar;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
public class MainActivity extends Activity implements ActionBar.TabListener {
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
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) {
mViewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
}
Inside Adapter you have to create instances of fragmnets what you need to place in your activity like a tabs
P.S. sorry for my english and typo

Related

How Can i Implementing Swipe View in ActionTab and Fragments within Multiple Fragments?

I am working on Actionbar.TabListener and Fragments
Tab.
Fragments contains multiple Fragments that are generated via clickable buttons on each tabbed Fragments.
My MainActivity and other files are shown below:
My main activity is as follows:
import android.app.ActionBar;
import android.app.Fragment;
import android.os.Bundle;
import android.app.Activity;
public class MainActivity extends Activity {
// Declare Tab Variable
ActionBar.Tab Tab1, Tab2, Tab3;
Fragment fragmentTab1 = new FragmentTab1();
Fragment fragmentTab2 = new Mcx();
Fragment fragmentTab3 = new FragmentTab3();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ActionBar actionBar = getActionBar();
// Hide Actionbar Icon
actionBar.setDisplayShowHomeEnabled(false);
// Hide Actionbar Title
actionBar.setDisplayShowTitleEnabled(false);
// Create Actionbar Tabs
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Set Tab Icon and Titles
Tab1 = actionBar.newTab().setText("A");
Tab2 = actionBar.newTab().setText("B");
Tab3 = actionBar.newTab().setText("C");
// Set Tab Listeners
Tab1.setTabListener(new TabListener(fragmentTab1));
Tab2.setTabListener(new TabListener(fragmentTab2));
Tab3.setTabListener(new TabListener(fragmentTab3));
// Add tabs to actionbar
actionBar.addTab(Tab1);
actionBar.addTab(Tab2);
actionBar.addTab(Tab3);
}
}
And TabListener file that extends ActionBar.Tablistener:
import android.app.ActionBar.Tab;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.app.ActionBar;
public class TabListener implements ActionBar.TabListener {
Fragment fragment;
public TabListener(Fragment fragment) {
// TODO Auto-generated constructor stub
this.fragment = fragment;
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
ft.replace(R.id. fragment_container, fragment);
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
ft.remove(fragment);
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
activity_main.xml is configured as the following:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
Question:
Given what I have implemented above, how could I go about implementing both ActionTab and Fragment View as a swipe view?

After some research on the google i found that we can achieve swipe view in fragments with Tab with the use of ViewPager
Go to Android Studio and select TabActivity (Swipe with ViewPager template)
first we have to extend fragmentAcitvity with MainActivity, and that should be implemented with ActionBar.TabListener
The Code is as follows..
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
#SuppressWarnings("ALL")
public class MainActivity extends FragmentActivity implements ActionBar.TabListener{
ActionBar actionbar;
public static ViewPager viewpager;
FragmentPageAdapter ft;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewpager = (ViewPager) findViewById(R.id.pager);
ft = new FragmentPageAdapter(getSupportFragmentManager());
actionbar = getActionBar();
viewpager.setAdapter(ft);
actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionbar.addTab(actionbar.newTab().setText("TAB1").setTabListener(this));
actionbar.addTab(actionbar.newTab().setText("TAB2").setTabListener(this));
actionbar.addTab(actionbar.newTab().setText("TAB3").setTabListener(this));
actionbar.addTab(actionbar.newTab().setText("TAB").setTabListener(this));
viewpager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int arg0) {
actionbar.setSelectedNavigationItem(arg0);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
#Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
});
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
viewpager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
XML for MainActivity .... activity_mail.xml will be...
<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=".MainActivity" />
FragmentpageAdapter
public class FragmentPageAdapter extends FragmentPagerAdapter {
public FragmentPageAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int arg0) {
switch (arg0){
case 0: return new Tab1Fragment();
case 1: return new Tab2Fragment();
case 2: return new Tab3Fragment();
case 3: return new Tab4Fragment();
default:break;
}
return null;
}
#Override
public int getCount() {
return 4;
}
#Override
public CharSequence getPageTitle(int position) {
return getPageTitle(4);
}
}
If you take By default Template in Android Studio as mentioned above there will be an fragment_main file also ...
<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:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context=".MainActivity$PlaceholderFragment">
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/toolbar"
android:minHeight="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:popupTheme="#style/ThemeOverlay.AppCompat.Light">
</android.support.v7.widget.Toolbar>
</RelativeLayout>
After that implement all Fragments with related Tabs that you declared and added in FragmentPagerAdapter and MainActivity.
You have to set activity theme in Androidmenifest.xml
"#android:style/Theme.Holo.Light"
and also in style.xml
<style name="AppTheme" parent="Theme.AppCompat">

Android using fragments

I want to start a fragment with using onclick function.How can I do this ? I am using this code:
package info.androidhive.tabsswipe;
import info.androidhive.tabsswipe.adapter.TabsPagerAdapter;
import info.androidhive.tabsswipe.R;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.view.Menu;
public class MainActivity extends FragmentActivity implements
ActionBar.TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
// Tab titles
private String[] tabs = { "Top Rated", "Games", "Movies" };
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Initilization
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Adding Tabs
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name)
.setTabListener(this));
}
/**
* on swiping the viewpager make respective tab selected
* */
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
// on changing the page
// make respected tab selected
actionBar.setSelectedNavigationItem(position);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// on tab selected
// show respected fragment view
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
}
I want create a function in mainactivity and when this function is run I want to change fragment.
Ps:I don't want to add this fragment to tabs.
Other codes(layout,tabs adapter etc):http://www.androidhive.info/2013/10/android-tab-layout-with-swipeable-views-1/#disqus_thread

Assuming that you already know how to create the Fragment class, all you need to do is:
#Override
public void onClick(View view) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.container, new YourFragment());
fragmentTransaction.commit();
}
R.id.container is the layout where you are adding the Fragment. It should be in you main.xml
EDIT
You need a container for your Fragment so in your xml you need something like this:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</FrameLayout>
Now when you add the Fragment it will be inflated inside of that container.

Actionbar Tab in API 10

I have an app with 4 actionbar's tabs. Although I imported android.support.v7.app. ActionBar library, it's only displayed in API 16 device but not in API 10 device. What's the solution here?
Main Activity:
import android.app.ActionBar;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.support.v7.app.ActionBar.TabListener;
import android.support.v7.app.ActionBarActivity;
public class MainActivity extends ActionBarActivity {
public android.support.v7.app.ActionBar actionbar;
public ViewPager viewpager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
actionbar = getSupportActionBar();
actionbar.setDisplayShowHomeEnabled(false);
actionbar.setDisplayShowTitleEnabled(false);
actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
viewpager = (ViewPager) findViewById(R.id.pager);
FragmentManager fm = getSupportFragmentManager();
addPageChangeListener();
MyFragmentPagerAdapter fragmentPagerAdapter = new MyFragmentPagerAdapter(fm);
viewpager.setAdapter(fragmentPagerAdapter);
addActionBarListener();
}
public void addPageChangeListener() {
ViewPager.OnPageChangeListener pageChangeListener = new OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionbar.setSelectedNavigationItem(position);
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
};
viewpager.setOnPageChangeListener(pageChangeListener);
}
public void addActionBarListener() {
android.support.v7.app.ActionBar.TabListener listener = new TabListener() {
#Override
public void onTabUnselected(
android.support.v7.app.ActionBar.Tab arg0,
android.support.v4.app.FragmentTransaction arg1) {
}
#Override
public void onTabSelected(android.support.v7.app.ActionBar.Tab tab,
android.support.v4.app.FragmentTransaction arg1) {
viewpager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabReselected(
android.support.v7.app.ActionBar.Tab arg0,
android.support.v4.app.FragmentTransaction arg1) {
}
};
android.support.v7.app.ActionBar.Tab tab = actionbar.newTab()
.setTabListener(listener);
tab.setCustomView(R.layout.search);
actionbar.addTab(tab);
tab = actionbar.newTab().setTabListener(listener);
tab.setCustomView(R.layout.filter);
actionbar.addTab(tab);
tab = actionbar.newTab().setTabListener(listener);
tab.setCustomView(R.layout.favorite);
actionbar.addTab(tab);
tab = actionbar.newTab().setTabListener(listener);
tab.setCustomView(R.layout.info);
actionbar.addTab(tab);
}
}
MyPagerFragmentAdapter:
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
public class MyFragmentPagerAdapter extends FragmentPagerAdapter {
public final int PAGE_COUNT = 4;
public MyFragmentPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
// TODO Auto-generated method stub
Bundle data = new Bundle();
switch (i) {
case 0:
SearchFragment searchFragment = new SearchFragment();
return searchFragment;
case 1:
FilterFragment filterFragment = new FilterFragment();
return filterFragment;
case 2:
FavoriteFragment favoriteFragment = new FavoriteFragment();
return favoriteFragment;
case 3:
InfoFragment infoFragment = new InfoFragment();
return infoFragment;
}
return null;
}
#Override
public int getCount() {
return PAGE_COUNT;
}
}
Main Activity Layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v4.view.ViewPager
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent" />

Try with replacing import android.app.ActionBar;
with this one import android.support.v7.app.ActionBar;.
Also check your application theme should be android:theme="#style/Theme.AppCompat" in your AndroidManifest.xml file
Refer below link for more details...
http://wptrafficanalyzer.in/blog/swipable-navigation-tabs-using-actionbarcompat-library/

Finally, I solved my problems. Just because of my fault while customing the view for tabs. I extended wrong theme:
<style name="ActionBarTabStyle" parent="#android:Widget.ActionBar.TabView">
instead of:
<style name="ActionBarTabStyle" parent="#style/Widget.AppCompat.ActionBar.TabView">
Thanks everyone for supporting me!

Add a dynamic listview to a fragment

In my app I need the possibility to create a dynamic listview populated by elements extracted from the db.
This in itself wouldn't be a big problem (there are a lot of tutorials about it, like this one), problem is, my activity is divided in tabs and, therefore, I have a Fragment for each tab (the code it's basically this).
There are lots of methods that I can't use in a Fragmentand I'm honestly pretty stuck.
How can I implement a dynamic layout solution inside a fragment?
Edit: code for clarity:
Fragment:
package it.sii.mywaiter;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class AllerFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.aller_layout, container, false);
return rootView;
}
}
Activity:
package it.sii.mywaiter;
import android.app.ActionBar.Tab;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
//import android.widget.*;
import android.app.ActionBar;
public class UserPrefActivity extends FragmentActivity implements ActionBar.TabListener {
private ViewPager viewPager;
private PrefPagerAdapter mAdapter;
private ActionBar actionBar;
// Tab titles
private String[] tabs = { "Ingredienti preferiti", "Allergie e Intolleranze" };
int tabsnum = tabs.length;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.user_pref_layout);
// Initilization
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new PrefPagerAdapter(getSupportFragmentManager());
mAdapter.setCount(tabsnum);
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Adding Tabs
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name)
.setTabListener(this));
}
/**
* on swiping the viewpager make respective tab selected
* */
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
// on changing the page
// make respected tab selected
actionBar.setSelectedNavigationItem(position);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// on tab selected
// show respected fragment view
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
}
Adapter
package it.sii.mywaiter;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
public class PrefPagerAdapter extends FragmentPagerAdapter {
private int count = 0;
public PrefPagerAdapter(FragmentManager fm) {
super(fm);
}
public void setCount(int count){
this.count = count;
}
#Override
public Fragment getItem(int index) {
switch (index) {
case 0:
return new PrefFragment();
case 1:
return new AllerFragment();
}
return null;
}
#Override
public int getCount() {
return count;
}
}
Fragment's layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#fa6a6a" >
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="test test"
android:textSize="20sp"
android:layout_centerInParent="true"/>
</RelativeLayout>

As you said, you have Fragments. Every Fragment has its own class so you can create a CustomArrayAdapter and the use it in the Fragments onCreate Method. Inside the Fragment get your ListView, which you defined in the xml File for this Fragment, with findViewByID and then set its Adapter with setAdapter(new YourCustomAdapterClass()); then you have your custom dynamic ListView in a Fragment.

Update a TextView in a ViewPager from another Fragment

I am trying to update a TextView in a Fragment clicking on a button on another Fragment.
Actually I implemented the callback function to the Activity and it does work, since the Logcat reports that the text in the TextView has been changed. The problem is the Textview shown in the first fragment is not updated to the new value! It's like the Fragment needs to be updated or something...
Here's the ActionBarTabsPager activity code:
import java.util.ArrayList;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentManager.OnBackStackChangedListener;
import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.ActionBar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.ActionBar.Tab;
import android.support.v4.app.SupportActivity;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.TextView;
/**
* Demonstrates combining the action bar with a ViewPager to implement a tab UI
* that switches between tabs and also allows the user to perform horizontal
* flicks to move between the tabs.
*/
public class ActionBarTabsPager extends FragmentActivity implements SecondFragment.OnButtonClickedXListener{
ViewPager mViewPager;
TabsAdapter mTabsAdapter;
FragmentManager fm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.actionbar_tabs_pager);
if (savedInstanceState == null) {
Fragment newFragment = new FirstFragment();
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.add(R.id.abs__custom, newFragment, "FirstFragment").commit();
Fragment newFragment2 = new FirstFragment();
FragmentTransaction ft2 = getSupportFragmentManager().beginTransaction();
ft2.add(R.id.abs__custom, newFragment2, "SecondFragment").commit();
}
getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab tab1 = getSupportActionBar().newTab().setText("Fragment 1");
ActionBar.Tab tab2 = getSupportActionBar().newTab().setText("Fragment 2");
//ActionBar.Tab tab3 = getSupportActionBar().newTab().setText("Fragment 1");
//ActionBar.Tab tab4 = getSupportActionBar().newTab().setText("Fragment 2");
mViewPager = (ViewPager)findViewById(R.id.pager);
mTabsAdapter = new TabsAdapter(this, getSupportActionBar(), mViewPager);
mTabsAdapter.addTab(tab1, FirstFragment.class);
mTabsAdapter.addTab(tab2, SecondFragment.class);//LoaderCursorSupport.CursorLoaderListFragment.class);
//mTabsAdapter.addTab(tab3, FirstFragment.class);//LoaderCustomSupport.AppListFragment.class);
//mTabsAdapter.addTab(tab4, SecondFragment.class);//LoaderThrottleSupport.ThrottledLoaderListFragment.class);
if (savedInstanceState != null) {
getSupportActionBar().setSelectedNavigationItem(savedInstanceState.getInt("index"));
}
}
#Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("index", getSupportActionBar().getSelectedNavigationIndex());
}
/**
* 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 TabsAdapter extends FragmentPagerAdapter implements ViewPager.OnPageChangeListener, ActionBar.TabListener {
private final Context mContext;
private final ActionBar mActionBar;
private final ViewPager mViewPager;
private final ArrayList<String> mTabs = new ArrayList<String>();
public TabsAdapter(FragmentActivity activity, ActionBar actionBar, ViewPager pager) {
super(activity.getSupportFragmentManager());
mContext = activity;
mActionBar = actionBar;
mViewPager = pager;
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(ActionBar.Tab tab, Class<?> clss) {
mTabs.add(clss.getName());
mActionBar.addTab(tab.setTabListener(this));
notifyDataSetChanged();
}
#Override
public int getCount() {
return mTabs.size();
}
#Override
public Fragment getItem(int position) {
return Fragment.instantiate(mContext, mTabs.get(position), null);
}
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
mActionBar.setSelectedNavigationItem(position);
}
#Override
public void onPageScrollStateChanged(int state) {
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
mViewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
}
#Override
public void OnButtonClickedX(View v) {
if (v==findViewById(R.id.button1)){
Log.i("TRIGGERED","TRIGGERED");
FirstFragment ff = (FirstFragment) getSupportFragmentManager().findFragmentByTag("FirstFragment");
View root = ff.getView();
TextView tv = (TextView) root.findViewById(R.id.textView1);
Log.i("Text before Edit",""+tv.getText());
tv.setText("MODIFIED");
Log.i("Text after Edit",""+tv.getText());
}
// TODO Auto-generated method stub
}
}
FirstFragment:
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class FirstFragment extends Fragment {
int mNum;
/**
* Create a new instance of FirstFragment, providing "num"
* as an argument.
*/
static FirstFragment newInstance(int num) {
FirstFragment f = new FirstFragment();
// Supply num input as an argument.
Bundle args = new Bundle();
args.putInt("num", num);
f.setArguments(args);
return f;
}
/**
* When creating, retrieve this instance's number from its arguments.
*/
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mNum = getArguments() != null ? getArguments().getInt("num") : 1;
}
/**
* The Fragment's UI is just a simple text view showing its
* instance number.
*/
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.myfrag1, container, false);
return v;
}
}
SecondFragment:
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.SupportActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
public class SecondFragment extends Fragment {
int mNum;
OnButtonClickedXListener mListener;
/**
* Create a new instance of CountingFragment, providing "num"
* as an argument.
*/
static SecondFragment newInstance(int num) {
SecondFragment f = new SecondFragment();
// Supply num input as an argument.
Bundle args = new Bundle();
args.putInt("num", num);
f.setArguments(args);
return f;
}
/**
* When creating, retrieve this instance's number from its arguments.
*/
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mNum = getArguments() != null ? getArguments().getInt("num") : 1;
}
/**
* The Fragment's UI is just a simple text view showing its
* instance number.
*/
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.myfrag2, container, false);
View button1 = v.findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
mListener.OnButtonClickedX(v);
// TODO Auto-generated method stub
}
});
return v;
}
public interface OnButtonClickedXListener{
public void OnButtonClickedX(View v);
}
#Override
public void onAttach(SupportActivity activity) {
// TODO Auto-generated method stub
super.onAttach(activity);
try {
mListener = (OnButtonClickedXListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString() + " must implement OnButtonClickedXListener");
}
}
}
myfrag1.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" >
<TextView
android:id="#+id/textView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:text="No String"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
myfrag2.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="#+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="Button" />
</LinearLayout>
EDIT:
Even changing to 0 the ContainerViewId in ft.add() doesn't impact at all in final rendering. SO I guess the rendering is managed by
mTabsAdapter.addTab(tab1, FirstFragment.class);
mTabsAdapter.addTab(tab2, SecondFragment.class);
The issue is still the same, anyway.
Here's actionbar_tabs_pager.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>

SOLVED!
Overriding instantiateItem() in TabsAdapter and adding the ViewPager as ContainerViewID in the FragmentTransaction made it!
Here's the functioning whole FragmentActivity!
import java.util.ArrayList;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentManager.OnBackStackChangedListener;
import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.ActionBar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.ActionBar.Tab;
import android.support.v4.app.SupportActivity;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.TextView;
/**
* Demonstrates combining the action bar with a ViewPager to implement a tab UI
* that switches between tabs and also allows the user to perform horizontal
* flicks to move between the tabs.
*/
public class ActionBarTabsPager extends FragmentActivity implements SecondFragment.OnButtonClickedXListener{
ViewPager mViewPager;
TabsAdapter mTabsAdapter;
FragmentManager fm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.i("ONCREATE START","ONCREATE START");
setContentView(R.layout.actionbar_tabs_pager);
if (savedInstanceState == null) {
Fragment newFragment = new FirstFragment();
Fragment newFragment2 = new SecondFragment();
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.add(R.id.pager, newFragment, "FirstFragment");
ft.add(R.id.pager, newFragment2, "SecondFragment");
ft.commit();
}
getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab tab1 = getSupportActionBar().newTab().setText("Fragment 1");
ActionBar.Tab tab2 = getSupportActionBar().newTab().setText("Fragment 2");
//ActionBar.Tab tab3 = getSupportActionBar().newTab().setText("Fragment 1");
//ActionBar.Tab tab4 = getSupportActionBar().newTab().setText("Fragment 2");
mViewPager = (ViewPager)findViewById(R.id.pager);
mTabsAdapter = new TabsAdapter(this, getSupportActionBar(), mViewPager);
mTabsAdapter.addTab(tab1, FirstFragment.class);
mTabsAdapter.addTab(tab2, SecondFragment.class);//LoaderCursorSupport.CursorLoaderListFragment.class);
//mTabsAdapter.addTab(tab3, FirstFragment.class);//LoaderCustomSupport.AppListFragment.class);
//mTabsAdapter.addTab(tab4, SecondFragment.class);//LoaderThrottleSupport.ThrottledLoaderListFragment.class);
if (savedInstanceState != null) {
getSupportActionBar().setSelectedNavigationItem(savedInstanceState.getInt("index"));
}
Log.i("ONCREATE END","ONCREATE END");
}
#Override
protected void onSaveInstanceState(Bundle outState) {
Log.i("onSaveInstanceState START","onSaveInstanceState START");
super.onSaveInstanceState(outState);
outState.putInt("index", getSupportActionBar().getSelectedNavigationIndex());
Log.i("onSaveInstanceState END","onSaveInstanceState END");
}
/**
* 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 TabsAdapter extends FragmentPagerAdapter implements ViewPager.OnPageChangeListener, ActionBar.TabListener {
private final Context mContext;
private final ActionBar mActionBar;
private final ViewPager mViewPager;
private final ArrayList<String> mTabs = new ArrayList<String>();
private FragmentTransaction mCurTransaction = null;
public TabsAdapter(FragmentActivity activity, ActionBar actionBar, ViewPager pager) {
super(activity.getSupportFragmentManager());
mContext = activity;
mActionBar = actionBar;
mViewPager = pager;
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(ActionBar.Tab tab, Class<?> clss) {
Log.i("addTab","addTab");
mTabs.add(clss.getName());
mActionBar.addTab(tab.setTabListener(this));
notifyDataSetChanged();
}
#Override
public int getCount() {
return mTabs.size();
}
#Override
public Object instantiateItem(View container, int position) {
if (mCurTransaction == null) {
mCurTransaction = getSupportFragmentManager().beginTransaction();
}
// TODO Auto-generated method stub
Fragment fragment = getItem(position);
if (fragment!=null){
Log.i("Fragment Found!","Fragment Found! "+fragment.getTag());
mCurTransaction.attach(fragment);
}
return fragment;//super.instantiateItem(container, position);
}
#Override
public Fragment getItem(int position) {
Log.i("getItem","getItem");
if (position==0)
{Log.i("position=0","position=0");
return getSupportFragmentManager().findFragmentByTag("FirstFragment");}
else if (position==1)
{Log.i("position=1","position=1");
return getSupportFragmentManager().findFragmentByTag("SecondFragment");}
else return null;//Fragment.instantiate(mContext, mTabs.get(position), null);
}
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
mActionBar.setSelectedNavigationItem(position);
}
#Override
public void onPageScrollStateChanged(int state) {
}
#Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
mViewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
#Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
}
#Override
public void OnButtonClickedX(View v) {
if (v==findViewById(R.id.button1)){
Log.i("TRIGGERED","TRIGGERED");
FirstFragment ff = (FirstFragment) getSupportFragmentManager().findFragmentByTag("FirstFragment");
View root = ff.getView();
TextView tv = (TextView) root.findViewById(R.id.textView1);
Log.i("Text before Edit",""+tv.getText());
tv.setText("MODIFIED");
Log.i("Text after Edit",""+tv.getText());
}
// TODO Auto-generated method stub
}
}
Thanks to vbsteven!

I assume the Fragments you are seeing on screen are not the Fragments you manually add with the tags "FirstFragment" and "SecondFragment" but instead the fragments that are added by the getItem method of your TabsAdapter.
If you look at its implementation, it instantiates new Fragments.
#Override
public Fragment getItem(int position) {
return Fragment.instantiate(mContext, mTabs.get(position), null);
}
These newly created Fragments are added to the FragmentManager with custom tags generated in FragmentPagerAdapter (which TabsAdapter extends)

My guess is that this is case of "overlapping" fragments - not uncommon to those trying out Fragments for the first time. Everytime you re-display a Fragment (display a Fragment, show another, then go back to the first fragment you displayed), you're creating a new Fragment behind the visible fragment. The "mirror fragment" remains on top, blocking your view to the fragment behind it. Only by scrolling that fragment will you see that the fragment behind really does get updated.
Most of the time it's just a case of you repeating what you did in XML in your FragmentActivity. Post your layout xml's so the fragment pros can diagnose your problem better.

Please post actionbar_tabs_pager.xml as well.
Don't know if it solves your issues but in this part of your code you add FirstFragment() for both fragments...
Fragment newFragment = new FirstFragment();
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.add(R.id.abs__custom, newFragment, "FirstFragment").commit();
Fragment newFragment2 = new FirstFragment();
FragmentTransaction ft2 = getSupportFragmentManager().beginTransaction();
ft2.add(R.id.abs__custom, newFragment2, "SecondFragment").commit();
...and you could write it more simple like that:
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.add(R.id.abs__custom, newFragment, "FirstFragment");
ft.add(R.id.abs__custom, newFragment2, "SecondFragment");
ft.commit();

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

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