Issue with Fragment on Android Developer Page

Issue with Fragment on Android Developer Page - android

I was reading the documentation on Fragment on the Developer site. I created a new project targeting api 8:android 2.2. I have the Android Support Library install, and I added the android support library to the project. I started implementing the helper method showDetails, and I get the red squiggly line saying that "a_item could not be resolved". I don't remember the instruction saying create an a_item variable or add a layout with a_item id.
In addition, in the detail activity, I am getting an error message too. (getFragmentManager().beginTransaction().add(android.R.id.content, details).commit();) It says "The method add(int, Fragment) in the type FragmentTransaction is not applicable for the arguments (int, DetailsFragment)". Did I miss something in the instructions?
Here are my sample codes:
package com.example.fragmentlayout;
import android.app.Activity;
import android.app.Fragment;
import android.content.res.Configuration;
import android.os.Bundle;
public class DetailsActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if(getResources().getConfiguration().ORIENTATION_LANDSCAPE == Configuration.ORIENTATION_LANDSCAPE )
{
finish();
return;
}
if(savedInstanceState == null)
{
DetailsFragment details = new DetailsFragment();
details.setArguments(getIntent().getExtras());
getFragmentManager().beginTransaction().add(android.R.id.content, details).commit();
}
}
}
Here is the Titles Fragment:
package com.example.fragmentlayout;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.ListFragment;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class TitlesFragment extends ListFragment {
boolean mDualPane;
int mCurCheckPosition =0;
String[] titles = {"Title 1", "Title 2", "Title 3"};
String[] Details = {"Details for one", "Details for two", "Details for Three"};
#SuppressLint("InlinedApi")
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setListAdapter(new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_activated_1, titles));
View detailsFrame = getActivity().findViewById(R.id.fragment2);
mDualPane = detailsFrame != null && detailsFrame.getVisibility() == View.VISIBLE;
if(savedInstanceState != null)
{
mCurCheckPosition = savedInstanceState.getInt("curChoise", 0);
}
if(mDualPane)
{
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
showDetails(mCurCheckPosition);
}
}
private void showDetails(int index) {
mCurCheckPosition = index;
if(mDualPane)
{
getListView().setItemChecked(index, true);
DetailsFragment details = (DetailsFragment) getFragmentManager().findFragmentById(R.id.fragment2);
if(details == null || details.getShownIndex() != index)
{
details = DetailsFragment.newInstance(index);
FragmentTransaction ft = getFragmentManager().beginTransaction();
if(index ==0)
{
ft.replace(R.id.fragment2, details);
} else
{
ft.replace(R.id.a_item, details);
}
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
} else
{
Intent intent = new Intent();
intent.setClass(getActivity(), DetailsActivity.class);
intent.putExtra("index", index);
startActivity(intent);
}
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
showDetails(position);
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("curChoice", mCurCheckPosition);
}
}
Here is the detailsFragment:
package com.example.fragmentlayout;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ScrollView;
import android.widget.TextView;
public class DetailsFragment extends Fragment {
String[] Details = {"Details for one", "Details for two", "Details for Three"};
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if(container == null)
{
return null;
}
ScrollView scroller = new ScrollView(getActivity());
TextView text = new TextView(getActivity());
int padding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,4, getActivity().getResources().getDisplayMetrics());
text.setPadding(padding, padding, padding, padding);
scroller.addView(text);
text.setText(Details[getShownIndex()]);
return scroller;
// return super.onCreateView(inflater, container, savedInstanceState);
}
public static DetailsFragment newInstance(int index)
{
DetailsFragment f = new DetailsFragment();
Bundle args = new Bundle();
args.putInt("index", index);
f.setArguments(args);
return f;
}
public int getShownIndex()
{
return getArguments().getInt("index", 0);
}
}
Here is the land and portrait layout
<LinearLayout 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:orientation="horizontal">
<fragment
android:id="#+id/fragment1"
android:name="com.example.fragmentlayout.TitlesFragment"
android:layout_width="0px"
android:layout_height="match_parent"
android:layout_weight="1" />
<fragment
android:id="#+id/fragment2"
android:name="com.example.fragmentlayout.DetailsFragment"
android:layout_width="0px"
android:layout_height="match_parent"
android:layout_weight="1"/>
</LinearLayout>
<FrameLayout 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:orientation="horizontal">
<fragment
android:id="#+id/fragment1"
android:name="com.example.fragmentlayout.TitlesFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>

Perhaps, it's a mistake. The answer is here
https://code.google.com/p/android/issues/detail?id=54837
The author of linked message advises to replace code fragment
if (index == 0) {
ft.replace(R.id.details, details);
} else {
ft.replace(R.id.a_item, details);
}
with code fragment
if (index == 0) {
ft.add(R.id.details, details);
} else {
ft.replace(R.id.details, details);
}
or maybe just
ft.replace(R.id.details, details);

Your DetailsActivity should extend FragmentActivity
You should use getSupportFragmentManager()
If you nest fragments into other fragments consider using getChildFragmentManager()
(ok, i didn't look through all of the code, so not sure if 3 is applicable)

You need to use getSupportFragmentManager instead of getFragmentManager, because you are using support fragments.
The R.id.a_item references the id of the layout in your layout file. Instead of android:id="#+id/fragment1", make it android:id="#+id/a_item"

Related

Updating a textView/s in a fragment from an Activity (using ViewPager)

I'm constantly receiving data in MainActivity and I need it to only be written a textView when the fragment that contains the textView is inflated. Obviously the app crashes if I try to write to a textView that is in a fragment currently not in display. I have made a dummy activity to explain my problem and I'm using a countdown timer to represent the data that is continually changing in the MainActivity. The issue resides in MainActivity.
Would someone mind explaining how I can only write to the textView when it is inflated?
Thanks
FragmentA.java (Fragment B and C are almost identical)
package com.felhr.scrolltabs;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* Created by Luke on 20/04/2015.
*/
public class FragmentA extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_a, container, false);
}
}
MainActivity.java
package com.felhr.scrolltabs;
import android.os.Bundle;
import android.os.CountDownTimer;
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.util.Log;
import android.widget.TextView;
public class MainActivity extends FragmentActivity {
ViewPager viewPager = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager)findViewById(R.id.pager);
FragmentManager fragmentManager = getSupportFragmentManager();
viewPager.setAdapter(new MyAdapter(fragmentManager));
final TextView timer = (TextView)findViewById(R.id.textViewTimer);
// Countdown timer code -> to be run constantly but only displayed in Fragment A is in focus
// This section breaks the code
new CountDownTimer(30000, 1000) {
public void onTick(long millisUntilFinished) {
timer.setText("seconds remaining: " + millisUntilFinished / 1000);
}
public void onFinish() {
timer.setText("done!");
}
}.start();
}
}
class MyAdapter extends FragmentPagerAdapter
{
public MyAdapter(FragmentManager fm)
{
super(fm);
}
#Override
public Fragment getItem(int i) {
Fragment fragment = null;
Log.d("SWIPE","get Item is called"+i);
if (i==0)
{
fragment=new FragmentA();
}
if (i==1)
{
fragment=new FragmentB();
}
if (i==2)
{
fragment=new FragmentC();
}
return fragment;
}
#Override
public int getCount() {
Log.d("SWIPE","get count is called");
return 3;
}
// talks to title to give the page
#Override
public CharSequence getPageTitle(int position) {
if (position == 0) {
return "Tab 1";
}
if (position == 1) {
return "Tab 2";
}
if (position == 2) {
return "Tab 3";
}
return null;
}
}
fragment_a.xml (fragments b and c are almost identical)
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#C3f3f3">
<TextView
android:id="#+id/textViewTimer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Fragment A"
android:textColor="#000000"
android:gravity="center"/>
</RelativeLayout>
activity_main.xml
<android.support.v4.view.ViewPager
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/pager">
<android.support.v4.view.PagerTitleStrip
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/title"
android:background="#33B5E5">
</android.support.v4.view.PagerTitleStrip>
</android.support.v4.view.ViewPager>

How to Reload TabContent on Click of tab in FragmentTabHost?

I am developing an android Application ,In which i am using FragmentTabHost, I am maintaining a container for each tab, But i am getting problem to reload Tabcontent when i reclick on tabs.
import android.content.Context;
import android.graphics.Color;
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.FragmentTabHost;
import android.support.v4.app.FragmentTransaction;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TabHost.TabSpec;
import android.widget.TabWidget;
import android.widget.TextView;
import com.eDeftsoft.FragmentsContainer.AboutContainerFragment;
import com.eDeftsoft.FragmentsContainer.BaseContainerFragment;
import com.eDeftsoft.FragmentsContainer.CityContainerFragment;
import com.eDeftsoft.FragmentsContainer.HomeContainerFragment;
import com.eDeftsoft.FragmentsContainer.PhotosContainerFragment;
import com.eDeftsoft.Utility.CommonDialogues;
public class HomeScreen extends FragmentActivity {
private static final String TAB_1_TAG = "Home";
private static final String TAB_2_TAG = "Photos";
private static final String TAB_3_TAG = "City";
private static final String TAB_4_TAG = "About";
private FragmentTabHost mTabHost;
TabWidget tbwidget;
HomeContainerFragment homeFragment;
PhotosContainerFragment photosFragment;
CityContainerFragment cityFragment;
AboutContainerFragment aboutFragment;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home_screen);
initView();
homeFragment = new HomeContainerFragment();
photosFragment = new PhotosContainerFragment();
cityFragment = new CityContainerFragment();
aboutFragment = new AboutContainerFragment();
}
private void initView() {
mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
mTabHost.addTab(setMyCustomIndicator(this, TAB_1_TAG, "Home"),
HomeContainerFragment.class, null);
mTabHost.addTab(setMyCustomIndicator(this, TAB_2_TAG, "Photos"),
PhotosContainerFragment.class, null);
mTabHost.addTab(setMyCustomIndicator(this, TAB_3_TAG, "City"),
CityContainerFragment.class, null);
mTabHost.addTab(setMyCustomIndicator(this, TAB_4_TAG, "About"),
AboutContainerFragment.class, null);
setTabHostColors();
mTabHost.setCurrentTabByTag("TAB_1_TAG");
mTabHost.setCurrentTab(0);
mTabHost.getTabWidget().setShowDividers(LinearLayout.SHOW_DIVIDER_NONE);
mTabHost.getTabWidget().setStripEnabled(false);
tbwidget = mTabHost.getTabWidget();
/*I had Also used This But getting error when i reclick on sametabs*/
// mTabHost.setOnTabChangedListener(new OnTabChangeListener() {
//
// #Override
// public void onTabChanged(String tabId) {
// // TODO Auto-generated method stub
// if (tabId.equals(TAB_1_TAG)) {
// pushFragments(TAB_1_TAG, homeFragment);
// } else if (tabId.equals(TAB_2_TAG)) {
// pushFragments(TAB_1_TAG, photosFragment);
//
// } else if (tabId.equals(TAB_3_TAG)) {
// pushFragments(TAB_1_TAG, cityFragment);
// } else {
// pushFragments(TAB_1_TAG, aboutFragment);
// }
//
// }
// });
}
/*
* insert the fragment into the FrameLayout
*/
// public void pushFragments(String tag, Fragment class1) {
//
// FragmentManager manager = getSupportFragmentManager();
// FragmentTransaction ft = manager.beginTransaction();
//
// ft.replace(R.id.realtabcontent, class1);
// ft.commit();
// }
public TabSpec setMyCustomIndicator(Context con, String tag,
String labeltext) {
TabHost.TabSpec spec = mTabHost.newTabSpec(tag);
View tabIndicator = LayoutInflater.from(this).inflate(
R.layout.tab_indicator, null, false);
((TextView) tabIndicator.findViewById(R.id.title)).setText(labeltext);
// ((ImageView) tabIndicator.findViewById(R.id.icon))
// .setImageResource(resid);
return spec.setIndicator(tabIndicator);
}
#Override
public void onBackPressed() {
boolean isPopFragment = false;
String currentTabTag = mTabHost.getCurrentTabTag();
FragmentManager fm = getSupportFragmentManager();
if (currentTabTag.equals(TAB_1_TAG)) {
for (int entry = 0; entry < fm.getBackStackEntryCount(); entry++) {
String ide = fm.getBackStackEntryAt(entry).getName();
Log.i("TAG" + TAB_1_TAG, "Found fragment: " + ide);
}
isPopFragment = ((BaseContainerFragment) getSupportFragmentManager()
.findFragmentByTag(TAB_1_TAG)).popFragment();
}
else if (currentTabTag.equals(TAB_2_TAG)) {
for (int entry = 0; entry < fm.getBackStackEntryCount(); entry++) {
String ide = fm.getBackStackEntryAt(entry).getName();
Log.i("TAG" + TAB_2_TAG, "Found fragment: " + ide);
}
isPopFragment = ((BaseContainerFragment) getSupportFragmentManager()
.findFragmentByTag(TAB_2_TAG)).popFragment();
}
else if (currentTabTag.equals(TAB_3_TAG)) {
for (int entry = 0; entry < fm.getBackStackEntryCount(); entry++) {
String ide = fm.getBackStackEntryAt(entry).getName();
Log.i("TAG" + TAB_3_TAG, "Found fragment: " + ide);
}
isPopFragment = ((BaseContainerFragment) getSupportFragmentManager()
.findFragmentByTag(TAB_3_TAG)).popFragment();
}
else if (currentTabTag.equals(TAB_4_TAG)) {
for (int entry = 0; entry < fm.getBackStackEntryCount(); entry++) {
String ide = fm.getBackStackEntryAt(entry).getName();
Log.i("TAG" + TAB_4_TAG, "Found fragment: " + ide);
}
isPopFragment = ((BaseContainerFragment) getSupportFragmentManager()
.findFragmentByTag(TAB_4_TAG)).popFragment();
}
if (!isPopFragment) {
CommonDialogues.showAlertDialog(HomeScreen.this,
"Application Will Exit", "Do you Want to Exit");
}
}
private void setTabHostColors() {
for (int i = 0; i < mTabHost.getTabWidget().getChildCount(); i++) {
mTabHost.getTabWidget().getChildAt(i)
.setBackgroundColor(Color.TRANSPARENT);
final TextView tv = (TextView) mTabHost.getTabWidget()
.getChildAt(i).findViewById(android.R.id.title);
if (tv == null)
continue;
else
tv.setTextSize(12);
}
}
#Override
public void onDestroy() {
super.onDestroy();
mTabHost = null;
}
}
When i go in inner fragments of tab1 , like from fragmentA -> Fragment B and From FragmentB -> fragmentC (and finally i am at fragmentC) , When i select Tab1 again i want to reload tabs and FragmentA should Apper.
Any help will be appreciated. I had gone through some of tutorials and coderepository but couldn`t found solution to my problem.
How Can i reload The content Of First tab when first tab is clicked again.

I had asked a question
When i go in inner fragments of tab1 , like from fragmentA -> Fragment B and From FragmentB -> fragmentC (and finally i am at fragmentC) , When i select Tab1 again i want to reload tabs and FragmentA should Apper.
I searched a lot and come to the conclusion , We can implement OnTabChangeListner and when any tab is clicked again we can reset it.(I was having need to reload tab when it is clicked 2nd time)
<!--Layout for Tabs -->
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TabHost
android:id="#android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:baselineAligned="false"
android:orientation="vertical" >
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<!-- android:background="#drawable/footer" -->
<FrameLayout
android:id="#+id/tabframeLayout"
android:layout_width="fill_parent"
android:layout_height="#dimen/tabframe_height"
android:layout_marginTop="1dp"
android:background="#FBFAFA" >
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="#dimen/tab_height"
android:background="#F2F0F0" >
</TabWidget>
</FrameLayout>
</LinearLayout>
</TabHost>
</RelativeLayout>
import java.util.ArrayList;
import java.util.HashMap;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.Typeface;
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.FragmentTransaction;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TextView;
import com.abc.Fragments.FragmentA;
import com.abc.Fragments.FragmentA1;
import com.abc.Fragments.FragmentA2;
import com.abc.Fragments.FragmentA3;
import com.abc.Utility.CommonDialogues;
public class MyHomeScreen extends FragmentActivity implements
OnTabChangeListener {
private TabHost tabHost;
private String currentSelectedTab;
private HashMap<String, ArrayList<Fragment>> hMapTabs;
final int TEXT_ID = 100;
final String arrTabLabel[] = { "FragmentA", "FragmentA1", "FragmentA2",
"FragmentA3" };
final static int arrIcons[] = { R.drawable.homee, R.drawable.photoi,
R.drawable.cityi, R.drawable.abouti };
private MyTabView arrTabs[] = new MyTabView[4];
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_home_screen);
hMapTabs = new HashMap<String, ArrayList<Fragment>>();
hMapTabs.put(AppConstant.TAB_1_TAG, new ArrayList<Fragment>());
hMapTabs.put(AppConstant.TAB_2_TAG, new ArrayList<Fragment>());
hMapTabs.put(AppConstant.TAB_3_TAG, new ArrayList<Fragment>());
hMapTabs.put(AppConstant.TAB_4_TAG, new ArrayList<Fragment>());
tabHost = (TabHost) findViewById(android.R.id.tabhost);
tabHost.setOnTabChangedListener(this);
tabHost.setup();
TabHost.TabSpec spec = tabHost.newTabSpec(AppConstant.TAB_1_TAG);
tabHost.setCurrentTab(0);
arrTabs[0] = new MyTabView(this, 0, arrTabLabel[0]);
spec.setContent(new TabHost.TabContentFactory() {
public View createTabContent(String tag) {
return findViewById(android.R.id.tabcontent);
}
});
spec.setIndicator(arrTabs[0]);
tabHost.addTab(spec);
spec = tabHost.newTabSpec(AppConstant.TAB_2_TAG);
arrTabs[1] = new MyTabView(this, 1, arrTabLabel[1]);
spec.setContent(new TabHost.TabContentFactory() {
public View createTabContent(String tag) {
return findViewById(android.R.id.tabcontent);
}
});
spec.setIndicator(arrTabs[1]);
tabHost.addTab(spec);
spec = tabHost.newTabSpec(AppConstant.TAB_3_TAG);
arrTabs[2] = new MyTabView(this, 2, arrTabLabel[2]);
spec.setContent(new TabHost.TabContentFactory() {
public View createTabContent(String tag) {
return findViewById(android.R.id.tabcontent);
}
});
spec.setIndicator(arrTabs[2]);
tabHost.addTab(spec);
spec = tabHost.newTabSpec(AppConstant.TAB_4_TAG);
arrTabs[3] = new MyTabView(this, 3, arrTabLabel[3]);
spec.setContent(new TabHost.TabContentFactory() {
public View createTabContent(String tag) {
return findViewById(android.R.id.tabcontent);
}
});
spec.setIndicator(arrTabs[3]);
tabHost.addTab(spec);
// set background for Selected Tab
TextView tv = (TextView) tabHost.getCurrentTabView().findViewById(
TEXT_ID);
// tv.setTextColor(Color.parseColor("#2882C6"));
View iv = (View) tabHost.getCurrentTabView();
// iv.setBackgroundResource(R.color.green);
// Listner for Tab 1//
tabHost.getTabWidget().getChildAt(0)
.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (hMapTabs.size() > 0) {
if (tabHost.getTabWidget().getChildAt(0)
.isSelected()) {
if (hMapTabs.get(AppConstant.TAB_1_TAG).size() > 1) {
resetFragment();
}
}
tabHost.getTabWidget().setCurrentTab(0);
tabHost.setCurrentTab(0);
}
}
});
/* Listner for Tab 2 */
tabHost.getTabWidget().getChildAt(1)
.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if (hMapTabs.size() > 0) {
if (tabHost.getTabWidget().getChildAt(1)
.isSelected()) {
if (hMapTabs.get(AppConstant.TAB_2_TAG).size() > 1) {
resetFragment();
}
}
tabHost.getTabWidget().setCurrentTab(1);
tabHost.setCurrentTab(1);
}
}
});
/* Listner for Tab 3 */
tabHost.getTabWidget().getChildAt(2)
.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if (hMapTabs.size() > 0) {
if (tabHost.getTabWidget().getChildAt(2)
.isSelected()) {
if (hMapTabs.get(AppConstant.TAB_3_TAG).size() > 1) {
resetFragment();
}
}
tabHost.getTabWidget().setCurrentTab(2);
tabHost.setCurrentTab(2);
}
}
});
/* Listner for Tab 4 */
tabHost.getTabWidget().getChildAt(3)
.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if (hMapTabs.size() > 0) {
if (tabHost.getTabWidget().getChildAt(3)
.isSelected()) {
if (hMapTabs.get(AppConstant.TAB_4_TAG).size() > 1) {
resetFragment();
}
}
tabHost.getTabWidget().setCurrentTab(3);
tabHost.setCurrentTab(3);
}
}
});
}
/* Method for adding fragment */
public void addFragments(String tabName, Fragment fragment,
boolean animate, boolean add) {
if (add) {
hMapTabs.get(tabName).add(fragment);
}
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction ft = manager.beginTransaction();
if (animate) {
ft.setCustomAnimations(R.animator.slide_in_right,
R.animator.slide_out_left);
}
ft.replace(android.R.id.tabcontent, fragment);
ft.commit();
}
/* Method for remove fragment */
public void removeFragment() {
Fragment fragment = hMapTabs.get(currentSelectedTab).get(
hMapTabs.get(currentSelectedTab).size() - 2);
hMapTabs.get(currentSelectedTab).remove(
hMapTabs.get(currentSelectedTab).size() - 1);
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction ft = manager.beginTransaction();
ft.setCustomAnimations(R.animator.slide_in_left,
R.animator.slide_out_right);
ft.replace(android.R.id.tabcontent, fragment);
ft.commit();
}
// reset frgment used when clicked on same tab
private void resetFragment() {
Fragment fragment = hMapTabs.get(currentSelectedTab).get(0);
hMapTabs.get(currentSelectedTab).clear();
hMapTabs.get(currentSelectedTab).add(fragment);
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction ft = manager.beginTransaction();
ft.setCustomAnimations(R.animator.slide_in_left,
R.animator.slide_out_right);
ft.replace(android.R.id.tabcontent, fragment);
ft.commit();
}
#Override
public void onBackPressed() {
if (hMapTabs.get(currentSelectedTab).size() <= 1) {
// super.onBackPressed();
CommonDialogues.showAlertDialog(MyHomeScreen.this,
"Application Will Exit", "Do you Want to Exit");
} else {
removeFragment();
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (hMapTabs.get(currentSelectedTab).size() == 0) {
return;
}
hMapTabs.get(currentSelectedTab)
.get(hMapTabs.get(currentSelectedTab).size() - 1)
.onActivityResult(requestCode, resultCode, data);
}
#Override
public void onTabChanged(String tabName) {
// TODO Auto-generated method stub
currentSelectedTab = tabName;
// make iteration for unselected tab and make normal background
for (int i = 0; i < tabHost.getTabWidget().getChildCount(); i++) {
TextView tv = (TextView) tabHost.getTabWidget().getChildAt(i)
.findViewById(TEXT_ID);
tv.setTextColor(Color.parseColor("#BDBDBD"));
View iv = (View) tabHost.getTabWidget().getChildAt(i);
iv.setBackgroundColor(0x00000000);
}
TextView tv = (TextView) tabHost.getCurrentTabView().findViewById(
TEXT_ID); // for Selected Tab
tv.setTextColor(Color.parseColor("#2882C6"));
View iv = (View) tabHost.getCurrentTabView();
if (hMapTabs.get(tabName).size() == 0) {
if (tabName.equals(AppConstant.TAB_1_TAG)) {
addFragments(tabName, new FragmentA(), false, true);
} else if (tabName.equals(AppConstant.TAB_2_TAG)) {
addFragments(tabName, new FragmentA1(), false, true);
} else if (tabName.equals(AppConstant.TAB_3_TAG)) {
addFragments(tabName, new FragmentA2(), false, true);
} else if (tabName.equals(AppConstant.TAB_4_TAG)) {
addFragments(tabName, new FragmentA3(), false, true);
}
} else {
addFragments(
tabName,
hMapTabs.get(tabName).get(hMapTabs.get(tabName).size() - 1),
false, false);
}
switch (tabHost.getCurrentTab()) {
case 0:
// we can also set background color of tabview
// iv.setBackgroundResource(R.color.green);
break;
case 1:
// iv.setBackgroundResource(R.color.red);
break;
case 2:
// iv.setBackgroundResource(R.color.yellow);
break;
case 3:
// iv.setBackgroundResource(R.color.twitter);
break;
}
}
private class MyTabView extends LinearLayout {
int nIdx = -1;
TextView tv;
public MyTabView(Context c, int drawableIdx, String label) {
super(c);
ImageView iv = new ImageView(c);
nIdx = drawableIdx;
// used for forground icons//
iv.setImageResource(arrIcons[nIdx]);
tv = new TextView(c);
tv.setText(label);
tv.setGravity(Gravity.BOTTOM);
tv.setTextSize(14.0f);
tv.setTypeface(null, Typeface.BOLD);
tv.setId(TEXT_ID);
LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT, 0.9f);
LinearLayout.LayoutParams layout = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT, 0.3f);
layout.setMargins(0, 3, 0, 0);
iv.setLayoutParams(layout);
layout.setMargins(0, 3, 0, 2);
tv.setLayoutParams(param);
tv.setTextColor(Color.parseColor("#BDBDBD"));
setOrientation(LinearLayout.VERTICAL);
setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL);
addView(iv);
addView(tv);
}
}
}
<!--Layout for FragmenA -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00ff00"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="TAB 1 FIRST SCREEN"
android:textColor="#color/dark_blue"
android:textSize="30sp"
android:textStyle="bold" />
<Button
android:id="#+id/btnNext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dip"
android:text="Go to Next Screen" />
<EditText
android:id="#+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPersonName" >
</EditText>
</LinearLayout>
code for fragment A ...it is extend By Basefragment
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
public class FirstScreen extends BaseFragment implements OnClickListener {
private Button btnNext;
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
Toast.makeText(getActivity(), "I am in onCreate", Toast.LENGTH_LONG).show();
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.tab1_firstscreen,
container, false);
btnNext = (Button) view.findViewById(R.id.btnNext);
btnNext.setOnClickListener(this);
System.out.println("replace");
return view;
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
fragmentTabActivity.addFragments(Const.TAB_FIRST,
new SecondScreen(), true, true);
}
}
Code for BaseFragment is
extend this class with all sub fragment which you are going to add on (While adding fragment use myhomescreenActivity(This object) and call add Function in MyHomeScreen ):
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
public class BaseFragment extends Fragment {
protected MyHomeScreen myhomescreenActivity;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
myhomescreenActivity = (MyHomeScreen) this.getActivity();
}
public boolean onBackPressed() {
return false;
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
}
}
This is the link of repository on Github for further understanding.......
https://github.com/thankimanish/TabUsingFragment

1.You can try moving your code inside the onCreate method to the onResume method so that every time fragment comes to front the code inside the onResume gets executed and reloads the frament.
2.You can also try overriding the onHiddenChanged method of the fragment and reload the fragment as soon as fragment becomes visible

issue with a fragment application

I am trying to develop an application using fragments that has two different layouts, similar to this one:
when i run my app on the phone it crashes immediatly.. here are my codes:
/layout
activity_titles_fragment.xml details_fragment.xml
/layout-land
activity_titles_fragment.xml
/sec
DetailsActivity.java DetailsFragment.java TitlesFragment.java
activity_titles_fragment.xml
<FrameLayout 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=".TitlesFragment" >
<fragment
class="com.example.fragmentsapp.TitlesFragment"
android:id="#+id/titles"
android:layout_height="match_parent"
android:layout_width="match_parent" />
</FrameLayout>
details_fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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/details"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
and for landscape, activity_titles_fragment.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="horizontal" >
<fragment
class="com.example.fragmentsapp.TitlesFragment"
android:id="#+id/titles"
android:layout_height="match_parent"
android:layout_width="0px"
android:layout_weight="1" />
<FrameLayout
android:id="#+id/details"
android:layout_height="match_parent"
android:layout_width="0px"
android:layout_weight="1" />
</LinearLayout>
DetailsActivity.java
package com.example.fragmentsapp;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
public class DetailsActivity extends FragmentActivity{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getResources().getConfiguration().orientation
== Configuration.ORIENTATION_LANDSCAPE) {
// If the screen is now in landscape mode, we can show the
// dialog in-line so we don't need this activity.
finish();
return;
}
if (savedInstanceState == null) {
// During initial setup, plug in the details fragment.
DetailsFragment details = new DetailsFragment();
details.setArguments(getIntent().getExtras());
getFragmentManager().beginTransaction().add(
R.id.details, details).commit();
}
}
}
DetailsFragment.java
package com.example.fragmentsapp;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class DetailsFragment extends Fragment {
public static DetailsFragment newInstance(int index)
{
// supply input index as argument
DetailsFragment f = new DetailsFragment();
Bundle args = new Bundle();
args.putInt("index", index);
f.setArguments(args);
return f;
}
public int getShownIndex()
{
return getArguments().getInt("index", 0);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if(container == null)
return null;
TextView text = new TextView(getActivity());
text.setText("Fragment number: " + getShownIndex());
return text;
}
}
TitlesFragment.java
package com.example.fragmentsapp;
import android.app.FragmentTransaction;
import android.app.ListFragment;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class TitlesFragment extends ListFragment {
boolean mDualPane;
int mCurCheckPosition = 0;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// populate list items with list view
setListAdapter(new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1,
getResources().getStringArray(R.array.titles)));
// check for mobile dual pane
View detailsFrame = getActivity().findViewById(R.id.details);
mDualPane = detailsFrame != null && detailsFrame.getVisibility() == View.VISIBLE;
if (savedInstanceState != null)
{
mCurCheckPosition = savedInstanceState.getInt("curChoice",0);
}
if (mDualPane)
{
showDetails(mCurCheckPosition);
}
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
showDetails(position);
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("curChoice", mCurCheckPosition);
}
private void showDetails(int index) {
mCurCheckPosition = index;
if(mDualPane)
{
DetailsFragment details = (DetailsFragment) getFragmentManager().findFragmentById(R.id.details);
if(details == null || details.getShownIndex() != index)
{
details = DetailsFragment.newInstance(index);
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.details, details);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
} else {
Intent intent = new Intent();
intent.setClass(getActivity(), DetailsActivity.class);
intent.putExtra("index", index);
startActivity(intent);
}
}
}

Have you declared all of your activities in your Android ? Have you not forgotten this one ?
<activity android:name=".activities.FragmentLayout$DetailsActivity">
</activity>
Also, you should add a stacktrace each time you are facing such kind of errors.

How do I use fragments properly

I'm trying to learn how to use Fragments in android. I create the separate classes and layouts. I'm having trouble understanding how I'm supposed to link them all. What exactly goes in my Main class? Could someone please demonstrate exactly how to use fragments in a very basic way?

please read this first as, i think, i has the very basics. Below is an example:
MainActivity:
public class MainActivity extends Activity implements OnClickListener{
private final String TAG = "MainActivity";
private int btn00Clicks = 0;
private int btn01Clicks = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mainactivity);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Fragment mSelectedFragment = null;
switch (v.getId()) {
case R.id.btn00:
Bundle mBundle00 = new Bundle();
String clicks00 = Integer.toString(btn00Clicks);
mBundle00.putString("btn00_clicks", clicks00);
mSelectedFragment = new Fragment00();
mSelectedFragment.setArguments(mBundle00);
if (mSelectedFragment != null) {
FragmentManager mFragmentManager = getFragmentManager();
mFragmentManager.beginTransaction()
.replace(R.id.fragment00ID, mSelectedFragment).commit();
}
btn00Clicks++;
break;
case R.id.btn01:
Bundle mBundle01 = new Bundle();
String clicks01 = Integer.toString(btn01Clicks);
mBundle01.putString("btn01_clicks", clicks01);
mSelectedFragment = new Fragment01();
mSelectedFragment.setArguments(mBundle01);
if (mSelectedFragment != null) {
FragmentManager mFragmentManager = getFragmentManager();
mFragmentManager.beginTransaction()
.replace(R.id.fragment00ID, mSelectedFragment).commit();
}
btn01Clicks++;
}
}
}
Fragment00.java:
public class Fragment00 extends Fragment {
private final String TAG = "Fragment00";
TextView mTv;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view = inflater.inflate(R.layout.fragment00, null);
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
mTv = (TextView) getView().findViewById(R.id.fragment00Tv00);
if (getArguments() != null) {
String str = getArguments().getString("btn00_clicks").toString();
mTv.setText("the Button was clicked "+str+ " time(s)");
Log.i(TAG, "onActivityCreated(): "+str);
}else {
Log.i(TAG, "onActivityCreated(): getArguments() is NULL");
}
}
#Override
public void onAttach(Activity activity) {
// TODO Auto-generated method stub
super.onAttach(activity);
}
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}
}
Fragment01.java:
public class Fragment01 extends Fragment {
private static final String TAG = "Fragment01";
TextView mTv;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.fragment01, null);
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
mTv = (TextView) getView().findViewById(R.id.fragment01Tv00);
if (getArguments() != null) {
String str = getArguments().getString("btn01_clicks").toString();
mTv.setText("the Button was clicked "+str+ " time(s)");
Log.i(TAG, "onActivityCreated(): "+str);
}else {
Log.i(TAG, "onActivityCreated(): getArguments() is NULL");
}
}
}
MainActivity_layout:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
tools:context="com.example.fragments01.MainActivity"
tools:ignore="MergeRootFrame">
<RelativeLayout
android:id="#+id/mainRelativeLayout00"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="top|center_vertical">
<Button
android:id="#+id/btn00"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="fragment_one"
android:onClick="onClick"></Button>
<Button
android:id="#+id/btn01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/btn00"
android:text="Fragment two"
android:onClick="onClick"></Button>
<fragment
android:name="com.example.fragments01.Fragment00"
android:id="#+id/fragment00ID"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="#+id/btn01">
</fragment>
</RelativeLayout>
Fragment00_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
tools:context="com.example.fragments01.Fragment00"
tools:ignore="MergeRootFrame"
android:background="#00ffff">
<RelativeLayout
android:id="#+id/fragment00RelativeLayout00"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="top|center_vertical">
<TextView
android:id="#+id/fragment00Tv00"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</TextView>
</RelativeLayout>
Fragment01_layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
tools:context="com.example.fragments01.Fragment01"
tools:ignore="MergeRootFrame"
android:background="#ffff00">
<RelativeLayout
android:id="#+id/fragment01RelativeLayout00"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="top|center_vertical">
<TextView
android:id="#+id/fragment01Tv00"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Fragment two">
</TextView>
<Button
android:id="#+id/fragment01Btn00"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Button of fragment two"
android:layout_below="#+id/fragment01Tv00">
</Button>
</RelativeLayout>

In your main class you produce one or more fragments... While you produce each fragment it's pretty similar to Activity,but has its own lifecircle(google it).
here's example on fragment:
public class DummySectionFragment3 extends Fragment
{
public DummySectionFragment3() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
View rootView = inflater.inflate(R.layout.exercise_layout,
container, false);
return rootView;
}
}
in OnCreateView() method you do what you usually do with activity.
My Main class contains SectionsPagerAdapter that switches between the fragments(A pager like in API samples)
create 2 or 3 fragments and just try it...
I didn't find any good example on it,so I just tried the above.

http://www.c-sharpcorner.com/UploadFile/2fd686/fragments/
Here's one good link with tabs and fragments.
You can also define your fragments in your xml.

Same as what LetsAmrIt posted, just another example:
Main Activity:
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Comparator;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
public class MainActivity extends Activity implements MyListFragment.MovieSelectedListener
{
Movie movie;
ListView movieList;
#SuppressWarnings("deprecation")
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
getWindow().setFormat(PixelFormat.RGBA_8888);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_DITHER);
setContentView(R.layout.activity_main);
try
{
FileInputStream fis = openFileInput("movies");
if (fis != null)
{
ObjectInputStream in = new ObjectInputStream(fis);
movie = (Movie) in.readObject();
in.close();
Toast.makeText(this, "Movies loaded.", Toast.LENGTH_SHORT).show();
}
}
catch (Exception e)
{
Toast.makeText(this, "No movies to load.", Toast.LENGTH_SHORT).show();
}
if (movie == null)
{
movie = new Movie();
movie.addMovie("Harry Potter", "12 January", "Thriller", 4, "Some people", "Bad", "Someone", "Walmer Park");
}
loadFragments();
}
public void loadFragments()
{
if ((getResources().getConfiguration().screenLayout &Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE)
{
Log.d("Screen Size: ", "LARGE");
// obtain the fragment manager
FragmentManager fragmentManager = getFragmentManager();
// determine if the fragment has already been loaded (may have happened)
Fragment listfrag = fragmentManager.findFragmentById(R.id.fragment_container);
// place fragment into container if not already there
if (listfrag == null) {
// start a transaction that will handle the swapping in/out
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
// multiple additions to the transaction can be done so that they
// changes will be done simultaneously
MyListFragment fragment1 = new MyListFragment();
fragmentTransaction.add(R.id.fragment_container, fragment1);
ViewFragment fragment2 = new ViewFragment();
fragmentTransaction.add(R.id.details_container, fragment2);
Bundle args = new Bundle();
args.putSerializable("Movie", movie);
fragment1.setArguments(args);
// commit the changes, i.e. do it!
fragmentTransaction.commit();
}
}
else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {
Log.d("Screen Size: ", "NORMAL");
// obtain the fragment manager
FragmentManager fragmentManager = getFragmentManager();
// determine if the fragment has already been loaded (may have happened)
Fragment listfrag = fragmentManager.findFragmentById(R.id.fragment_container);
// place fragment into container if not already there
if (listfrag == null) {
// start a transaction that will handle the swapping in/out
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
// multiple additions to the transaction can be done so that they
// changes will be done simultaneously
MyListFragment fragment = new MyListFragment();
fragmentTransaction.add(R.id.fragment_container, fragment);
Bundle args = new Bundle();
args.putSerializable("Movie", movie);
fragment.setArguments(args);
// commit the changes, i.e. do it!
fragmentTransaction.commit();
}
}
else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_SMALL) {
Log.d("Screen Size: ", "SMALL");
}
else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_XLARGE) {
Log.d("Screen Size: ", "XLARGE");
Log.d("Screen Size: ", "LARGE");
// obtain the fragment manager
FragmentManager fragmentManager = getFragmentManager();
// determine if the fragment has already been loaded (may have happened)
Fragment listfrag = fragmentManager.findFragmentById(R.id.fragment_container);
// place fragment into container if not already there
if (listfrag == null) {
// start a transaction that will handle the swapping in/out
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
// multiple additions to the transaction can be done so that they
// changes will be done simultaneously
MyListFragment fragment1 = new MyListFragment();
fragmentTransaction.add(R.id.fragment_container, fragment1);
ViewFragment fragment2 = new ViewFragment();
fragmentTransaction.add(R.id.details_container, fragment2);
Bundle args = new Bundle();
args.putSerializable("Movie", movie);
fragment1.setArguments(args);
// commit the changes, i.e. do it!
fragmentTransaction.commit();
}
}
else {
Log.d("Screen Size: ","UNKNOWN_CATEGORY_SCREEN_SIZE");
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu items for use in the action bar
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
public void pushFragment(Movie curMovie) {
// obtain the fragment manager
FragmentManager fragmentManager = getFragmentManager();
// start a transaction that will handle the swapping in/out
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
// add new fragment, BUT remember previous one, so that BACK button
// returns to it
ViewFragment fragment = new ViewFragment();
fragmentTransaction.replace(R.id.fragment_container, fragment);
fragmentTransaction.addToBackStack("view");
Bundle args = new Bundle();
args.putSerializable("curMovie", curMovie);
fragment.setArguments(args);
// commit the changes, i.e. do it!
fragmentTransaction.commit();
}
#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.
MyListFragment fragment = (MyListFragment) getFragmentManager().findFragmentById(R.id.fragment_container);
switch(item.getItemId())
{
case R.id.action_about:
About();
return true;
case R.id.action_add:
addMovie();
return true;
case R.id.sort_Title:
fragment.sortTitle();
return true;
case R.id.sort_Date:
fragment.sortDateViewed();
return true;
case R.id.sort_Rating:
fragment.sortRating();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if (requestCode == 1)
{
if (resultCode == RESULT_OK)
{
String title = data.getStringExtra("titleText");
String genre = data.getStringExtra("genreText");
String actors = data.getStringExtra("actorsText");
int rating = data.getIntExtra("ratingValue", 0);
String date = data.getStringExtra("dateWatched");
String watchedWith = data.getStringExtra("watchedWithText");
String watchedAt = data.getStringExtra("watchedAtText");
String comment = data.getStringExtra("commentText");
movie.addMovie(title, date, genre, rating, actors, comment, watchedWith, watchedAt);
write();
}
}
super.onActivityResult(requestCode, resultCode, data);
}
public void write()
{
try
{
FileOutputStream fos = openFileOutput("movies", Context.MODE_PRIVATE);
ObjectOutputStream out = new ObjectOutputStream(fos);
out.writeObject(movie);
fos.close();
Toast.makeText(this, "Movies saved.", Toast.LENGTH_SHORT).show();
}
catch (Exception e)
{
Toast.makeText(this, "Movies could not be saved.", Toast.LENGTH_SHORT).show();
}
}
public void addMovie()
{
Intent intentAdd = new Intent(MainActivity.this, AddMovie.class);
startActivityForResult(intentAdd, 1);
}
public void About()
{
Intent intentAbout = new Intent(this, About.class);
startActivity(intentAbout);
}
public void addDetails(Movie curMovie)
{
// obtain the fragment manager
FragmentManager fragmentManager = getFragmentManager();
// start a transaction that will handle the swapping in/out
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
ViewFragment fragment = new ViewFragment();
// REPLACE the existing fragment with another one
fragmentTransaction.replace(R.id.details_container, fragment);
Bundle args = new Bundle();
args.putSerializable("curMovie", curMovie);
fragment.setArguments(args);
// commit the changes, i.e. do it!
fragmentTransaction.commit();
}
#Override
public void onMovieSelected(String movieName) {
// TODO Auto-generated method stub
if ((getResources().getConfiguration().screenLayout &Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE)
{
Log.d("Screen Size: ", "LARGE");
Movie current = movie.getMovie(movieName);
Context context = getApplicationContext();
CharSequence text = current.MovieTitle;
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
addDetails(current);
}
else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {
Log.d("Screen Size: ", "NORMAL");
Movie current = movie.getMovie(movieName);
Context context = getApplicationContext();
CharSequence text = current.MovieTitle;
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
pushFragment(current);
}
else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_SMALL) {
Log.d("Screen Size: ", "SMALL");
}
else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_XLARGE) {
Log.d("Screen Size: ", "XLARGE");
}
else {
Log.d("Screen Size: ","UNKNOWN_CATEGORY_SCREEN_SIZE");
}
}
#Override
public void onDeleteSelected(String movie, MovieAdapter adapter) {
// TODO Auto-generated method stub
this.movie.deleteMovie(movie);
adapter.notifyDataSetChanged();
write();
}
}
Movie Adapter:
import java.util.List;
import android.content.Context;
import android.view.*;
import android.widget.ArrayAdapter;
import android.widget.RatingBar;
import android.widget.TextView;
public class MovieAdapter extends ArrayAdapter<Movie> {
private Context context;
private List<Movie> movies;
public MovieAdapter(Context context, List<Movie> movies)
{
super(context, R.layout.movie_layout, movies);
this.context = context;
this.movies = movies;
}
#Override
public View getView(int position, View convertView, ViewGroup parent)
{
View movieView = convertView;
if(movieView == null)
{
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
movieView = inflater.inflate(R.layout.movie_layout, parent, false);
}
movieView.setTag(movies.get(position));
TextView txtTitle = (TextView) movieView.findViewById(R.id.txtTitle);
TextView txtDate = (TextView) movieView.findViewById(R.id.txtDate);
RatingBar ratingBar = (RatingBar) movieView.findViewById(R.id.ratingBar);
txtTitle.setText(movies.get(position).MovieTitle);
txtDate.setText("Date Viewed: "+movies.get(position).dateViewed);
ratingBar.setIsIndicator(true);
ratingBar.setNumStars(movies.get(position).rating);
ratingBar.setRating(movies.get(position).rating);
return movieView;
}
}
List Fragment:
import java.util.Comparator;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Fragment;
import android.content.DialogInterface;
import android.util.Log;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.TextView;
public class MyListFragment extends Fragment{
Movie movie;
MovieAdapter adapter;
MovieSelectedListener callBack;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View view = inflater.inflate(R.layout.list_fragment, container, false);
ListView movieList = (ListView)view.findViewById(R.id.movieList);
movieList.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
TextView movie = (TextView)view.findViewById(R.id.txtTitle);
String title = movie.getText().toString();
callBack.onMovieSelected(title);
}
});
if (getArguments() != null)
movie = (Movie)getArguments().getSerializable("Movie");
Log.v("PASSED","Got here");
adapter = new MovieAdapter(getActivity(), movie.movies);
movieList.setAdapter(adapter);
movieList.setLongClickable(true);
movieList.setOnItemLongClickListener(new OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> parent, final View view,
int position, long id) {
// TODO Auto-generated method stub
AlertDialog.Builder dialog = new AlertDialog.Builder(getActivity());
dialog.setMessage("Are you sure you want to delete this movie?");
dialog.setTitle("Alert Message");
dialog.setCancelable(false);
dialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
TextView movie = (TextView)view.findViewById(R.id.txtTitle);
String title = movie.getText().toString();
callBack.onDeleteSelected(title, adapter);
}
});
dialog.setNegativeButton("No",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
dialog.show();
return false;
}
});
return view;
}
public interface MovieSelectedListener
{
public void onMovieSelected(String movie);
public void onDeleteSelected(String movie, MovieAdapter adapter);
}
#Override
public void onAttach(Activity activity)
{
super.onAttach(activity);;
try
{
callBack = (MovieSelectedListener) activity;
}
catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement MovieSelectedListener");
}
}
public void sortTitle()
{
adapter.sort(new Comparator<Movie>() {
public int compare(Movie lhs, Movie rhs) {
return lhs.MovieTitle.compareTo(rhs.MovieTitle);
}
});
adapter.notifyDataSetChanged();
}
public void sortDateViewed()
{
adapter.sort(new Comparator<Movie>() {
public int compare(Movie lhs, Movie rhs) {
return lhs.dateViewed.compareTo(rhs.dateViewed);
}
});
adapter.notifyDataSetChanged();
}
public void sortRating()
{
adapter.sort(new Comparator<Movie>() {
public int compare(Movie lhs, Movie rhs) {
return ((Integer)lhs.rating).compareTo(rhs.rating);
}
});
adapter.notifyDataSetChanged();
}
}
View Fragment
import android.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RatingBar;
import android.widget.TextView;
public class ViewFragment extends Fragment {
Movie curMovie = new Movie("Empty", "Empty", "Empty", 5, "Empty", "Empty", "Empty", "Empty");
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View view = inflater.inflate(R.layout.view_fragment, container, false);
if (getArguments() != null)
curMovie = (Movie)getArguments().getSerializable("curMovie");
TextView titleTxt = (TextView)view.findViewById(R.id.titleTxt);
titleTxt.setText(curMovie.MovieTitle);
TextView genreTxt = (TextView)view.findViewById(R.id.genreTxt);
genreTxt.setText(curMovie.genre);
TextView actorsTxt = (TextView)view.findViewById(R.id.actorsTxt);
actorsTxt.setText(curMovie.actors);
RatingBar ratingRes = (RatingBar)view.findViewById(R.id.ratingRes);
ratingRes.setIsIndicator(true);
ratingRes.setNumStars(curMovie.rating);
ratingRes.setRating(curMovie.rating);
TextView dateWatchedTxt = (TextView)view.findViewById(R.id.dateWatchedTxt);
dateWatchedTxt.setText(curMovie.dateViewed);
TextView watchedWithTxt = (TextView)view.findViewById(R.id.watchedWithTxt);
watchedWithTxt.setText(curMovie.viewedWith);
TextView watchedAtTxt = (TextView)view.findViewById(R.id.watchedAtTxt);
watchedAtTxt.setText(curMovie.viewedWhere);
TextView commentTxt = (TextView)view.findViewById(R.id.commentTxt);
commentTxt.setText(curMovie.comments);
// Inflate the layout for this fragment
return view;
}
}
Movie:
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
public class Movie implements Serializable
{
String MovieTitle, dateViewed, actors, genre, comments, viewedWith, viewedWhere;
int rating;
public Movie(String MovieTitle, String dateViewed, String genre, int rating, String actors, String comments, String viewedWith, String viewedWhere)
{
this.MovieTitle = MovieTitle;
this.dateViewed = dateViewed;
this.genre = genre;
this.rating = rating;
this.actors = actors;
this.comments = comments;
this.viewedWith = viewedWith;
this.viewedWhere = viewedWhere;
}
final List<Movie> movies = new ArrayList<Movie>();
public Movie(){
}
public void addMovie(String MovieTitle, String dateViewed, String genre, int rating, String actors, String comments, String viewedWith, String viewedWhere)
{
movies.add(new Movie(MovieTitle, dateViewed, genre, rating, actors, comments, viewedWith, viewedWhere));
}
public void deleteMovie(String movieTitle)
{
Movie toDelete = getMovie(movieTitle);
movies.remove(toDelete);
}
public Movie getMovie(String movie)
{
for(Movie mov:movies)
{
if(mov.MovieTitle.equals(movie))
{
return mov;
}
}
return null;
}
}
Add Movie:
import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.EditText;
import android.widget.RatingBar;
import android.widget.Toast;
public class AddMovie extends Activity
{
EditText title2;
EditText genre2;
EditText actors2;
RatingBar rating2;
EditText date2;
EditText watchedWith2;
EditText watchedAt2;
EditText comment2;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_movie);
//savedInstance
title2 = (EditText)findViewById(R.id.title);
genre2 = (EditText)findViewById(R.id.genre);
actors2 = (EditText)findViewById(R.id.actors);
rating2 = (RatingBar)findViewById(R.id.rating);
date2 = (EditText)findViewById(R.id.dateWatched);
watchedWith2 = (EditText)findViewById(R.id.watchedWith);
watchedAt2 = (EditText)findViewById(R.id.watchedAt);
comment2 = (EditText)findViewById(R.id.comment);
if ((savedInstanceState != null) && (savedInstanceState.containsKey("TITLE_STATE_KEY")))
{
title2.setText(savedInstanceState.getString("TITLE_STATE_KEY"));
actors2.setText(savedInstanceState.getString("ACTORS_STATE_KEY"));
genre2.setText(savedInstanceState.getString("GENRE_STATE_KEY"));
comment2.setText(savedInstanceState.getString("GC_STATE_KEY"));
watchedWith2.setText(savedInstanceState.getString("WITH_STATE_KEY"));
watchedAt2.setText(savedInstanceState.getString("LOCATION_STATE_KEY"));
date2.setText(savedInstanceState.getString("DATE_STATE_KEY"));
rating2.setRating(savedInstanceState.getFloat("RATING_STATE_KEY"));
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.add_movie, 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.
switch(item.getItemId())
{
case R.id.action_settings:
return true;
case R.id.action_done:
done();
default:
return super.onOptionsItemSelected(item);
}
}
public void done()
{
EditText title = (EditText)findViewById(R.id.title);
String titleText = title.getText().toString();
EditText genre = (EditText)findViewById(R.id.genre);
String genreText = genre.getText().toString();
EditText actors = (EditText)findViewById(R.id.actors);
String actorsText = actors.getText().toString();
RatingBar rating = (RatingBar)findViewById(R.id.rating);
int ratingValue = Math.round(rating.getRating());
EditText date = (EditText)findViewById(R.id.dateWatched);
String dateWatched = date.getText().toString();
EditText watchedWith = (EditText)findViewById(R.id.watchedWith);
String watchedWithText = watchedWith.getText().toString();
EditText watchedAt = (EditText)findViewById(R.id.watchedAt);
String watchedAtText = watchedAt.getText().toString();
EditText comment = (EditText)findViewById(R.id.comment);
String commentText = comment.getText().toString();
Intent intent = new Intent(AddMovie.this, MainActivity.class);
intent.putExtra("titleText", titleText);
intent.putExtra("genreText", genreText);
intent.putExtra("actorsText", actorsText);
intent.putExtra("ratingValue", ratingValue);
intent.putExtra("dateWatched", dateWatched);
intent.putExtra("watchedWithText", watchedWithText);
intent.putExtra("watchedAtText", watchedAtText);
intent.putExtra("commentText", commentText);
setResult(RESULT_OK, intent);
finish();
}
#Override
public void onSaveInstanceState(Bundle saveInstanceState)
{
saveInstanceState.putString("TITLE_STATE_KEY", title2.getText().toString());
saveInstanceState.putString("GENRE_STATE_KEY", genre2.getText().toString());
saveInstanceState.putString("GC_STATE_KEY", comment2.getText().toString());
saveInstanceState.putString("DATE_STATE_KEY", date2.getText().toString());
saveInstanceState.putString("ACTORS_STATE_KEY", actors2.getText().toString());
saveInstanceState.putString("WITH_STATE_KEY", watchedWith2.getText().toString());
saveInstanceState.putString("LOCATION_STATE_KEY", watchedAt2.getText().toString());
saveInstanceState.putFloat("RATING_STATE_KEY", rating2.getRating());
super.onSaveInstanceState(saveInstanceState);
}
}

The basic is like this:
Create one Activity and 2 Fragments.
If something happens in FragmantA something should change in fragmentB right. So the Activity links Fragment A and B together. What do you need for that: an Interface.
So create an Interface with a method which takes the right properties (don't forget the datatype). Now you can implement the interface in your activity.
After this you should initialize the interface in FragmentA in the onActivityCreated method. Perform the changes and send the data to the interfacemethod in the Activity. Create a reference to FragmentB using the FragmentManager. Now you can send the data/changes to FragmentB.
I hope you understand this ;). cheers

I made a sample project that doesn't use ViewPager and all the weird stuff, just the link between Activity and Fragment here on Stack Overflow and the same thing on Code Review to demonstrate it, click either links to see the project.

I used this link to get started
http://www.techotopia.com/index.php/Using_Fragments_in_Android_-_A_Worked_Example
This guy uses 2 different types of listeners and takes in the user input on the first fragment. The 2nd fragment outputs the data!
Goodluck!

Error compiling fragment example using android sherlock

I'm using Android Sherlock, and I'm trying to implement the classic example of fragments in Android:
http://developer.android.com/guide/topics/fundamentals/fragments.html
But in the file TitlesFragment.java there's an error avoiding my app to run. I don't know why.
package com.android.fragmenttest;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.actionbarsherlock.app.SherlockListFragment;
public class TitlesFragment extends SherlockListFragment {
boolean mDualPane;
int mCurCheckPosition = 0;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// Populate list with our static array of titles.
setListAdapter(new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, android.R.id.text1, Shakespeare.TITLES));
// Check to see if we have a frame in which to embed the details
// fragment directly in the containing UI.
View detailsFrame = getActivity().findViewById(R.id.details);
mDualPane = detailsFrame != null && detailsFrame.getVisibility() == View.VISIBLE;
if (savedInstanceState != null) {
// Restore last state for checked position.
mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);
}
if (mDualPane) {
// In dual-pane mode, the list view highlights the selected item.
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
// Make sure our UI is in the correct state.
showDetails(mCurCheckPosition);
}
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("curChoice", mCurCheckPosition);
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
showDetails(position);
}
// Helper function to show the details of a selected item, either by displaying a fragment in-place in the current UI, or starting a
// whole new activity in which it is displayed.
void showDetails(int index) {
mCurCheckPosition = index;
if (mDualPane) {
// We can display everything in-place with fragments, so update the list to highlight the selected item and show the data.
getListView().setItemChecked(index, true);
// Check what fragment is currently shown, replace if needed.
DetailsFragment details = (DetailsFragment) getFragmentManager().findFragmentById(R.id.details);
if (details == null || details.getShownIndex() != index) {
// Make new fragment to show this selection.
details = DetailsFragment.newInstance(index);
// Execute a transaction, replacing any existing fragment with this one inside the frame.
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.details, details);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
} else {
// Otherwise we need to launch a new activity to display the dialog fragment with selected text.
Intent intent = new Intent();
intent.setClass(getActivity(), DetailsActivity.class);
intent.putExtra("index", index);
startActivity(intent);
}
}
}
The lines Eclipse is crying about are:
View detailsFrame = getActivity().findViewById(R.id.details);
And:
DetailsFragment details = (DetailsFragment) getFragmentManager().findFragmentById(R.id.details);
And:
ft.replace(R.id.details, details);
Therefore, the R.id.details is the problem. The class DetailsFragment.java is defined below:
package com.android.fragmenttest;
import android.os.Bundle;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ScrollView;
import android.widget.TextView;
import com.actionbarsherlock.app.SherlockFragment;
public class DetailsFragment extends SherlockFragment {
// Create a new instance of DetailsFragment, initialized to show the text at 'index'.
public static DetailsFragment newInstance(int index) {
DetailsFragment f = new DetailsFragment();
// Supply index input as an argument.
Bundle args = new Bundle();
args.putInt("index", index);
f.setArguments(args);
return f;
}
public int getShownIndex() {
return getArguments().getInt("index", 0);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if (container == null) {
// We have different layouts, and in one of them this fragment's containing frame doesn't exist. The fragment
// may still be created from its saved state, but there is no reason to try to create its view hierarchy because it
// won't be displayed. Note this is not needed -- we could just run the code below, where we would create and return
// the view hierarchy; it would just never be used.
return null;
}
ScrollView scroller = new ScrollView(getActivity());
TextView text = new TextView(getActivity());
int padding = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 4, getActivity().getResources().getDisplayMetrics());
text.setPadding(padding, padding, padding, padding);
scroller.addView(text);
text.setText(Shakespeare.DIALOGUE[getShownIndex()]);
return scroller;
}
}
Does anybody knows why Eclipse doesn't let this fragment example compile?

It should be getSherlockActivity(); and getSupportFragmentManager(); when using ActionbarSherlock.

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.

Issue with Fragment on Android Developer Page - android

Your DetailsActivity should extend FragmentActivity You should use getSupportFragmentManager() If you nest fragments into other fragments consider using getChildFragmentManager() (ok, i didn't look through all of the code, so not sure if 3 is applicable)

You need to use getSupportFragmentManager instead of getFragmentManager, because you are using support fragments. The R.id.a_item references the id of the layout in your layout file. Instead of android:id="#+id/fragment1", make it android:id="#+id/a_item"

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issue with a fragment application

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Error compiling fragment example using android sherlock

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