Trying to use LeanbackTabLayout & LeanbackViewPager to create top navigation in my AndroidTv app, but somehow my rowsAdapter is null & crashes on setAdapter. When I debug, I see that the ListRow is not null. What am I doing wrong?
HomeActivity:
public class HomeActivity extends FragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
LeanbackTabLayout leanbackTabLayout = ActivityCompat.requireViewById(this, R.id.tablayout);
leanbackTabLayout.setFocusable(true);
LeanbackViewPager leanbackViewPager = ActivityCompat.requireViewById(this, R.id.viewpager);
TablayoutAdapter adapter = new TablayoutAdapter(getSupportFragmentManager(), 3);
leanbackViewPager.setAdapter(adapter);
leanbackTabLayout.setupWithViewPager(leanbackViewPager);
}
}
TablayoutAdapter:
public class TablayoutAdapter extends FragmentStatePagerAdapter {
int tabCount;
public TablayoutAdapter(#NonNull FragmentManager fm, int tabCount) {
super(fm);
this.tabCount = tabCount;
}
#NonNull
#Override
public Fragment getItem(int position) {
return new HomeFragment();
}
#Override
public int getCount() {
return tabCount;
}
}
HomeActivity xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".HomeActivity">
<androidx.leanback.tab.LeanbackTabLayout
android:id="#+id/tablayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:focusable="true"
android:nextFocusDown="#id/viewpager"
/>
<androidx.leanback.tab.LeanbackViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
HomeFragment:
public class HomeFragment extends Fragment {
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_home, container, false);
return view;
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
ListRowPresenter lrp = new ListRowPresenter();
final CardPresenter cardPresenter = new CardPresenter();
ArrayObjectAdapter rowsAdapter = new ArrayObjectAdapter(lrp);
for (int i = 0; i < 3; ++i) {
ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(cardPresenter);
listRowAdapter.add(new Navigation("Tab1"));
listRowAdapter.add(new Navigation("Tab2"));
listRowAdapter.add(new Navigation("Tab3"));
HeaderItem header = new HeaderItem(i, "Row " + i);
System.out.println(header);
System.out.println("hello");
rowsAdapter.add(new ListRow(header, listRowAdapter));
}
RowsSupportFragment rowsSupportFragment = (RowsSupportFragment) getChildFragmentManager().findFragmentById(R.id.row1);
System.out.println(rowsAdapter);
System.out.println("hello");
rowsSupportFragment.setAdapter(rowsAdapter);
}
}
HomeFragment xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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/row1"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
Related
i am new to Android Studio.. i am facing null pointer exception error on my TextView inside a Fragment, please help..here is my code. this is nothing but a simple interface between two fragments. i am getting Null pointer exception error when i click on an item in ListView Fragment. for sure the TextView in DetailsFragment didn't assign or point to the source of whatever it is. please help on solving this.
public class MainActivity extends AppCompatActivity implements list_Fragment.ItemSelected {
ArrayList<String> Descriptions = new ArrayList<String>();;
TextView tvDescription;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Descriptions.add("Description for Item 1");
Descriptions.add("Description for Item 2");
Descriptions.add("Description for Item 3");
Descriptions.add("Description for Item 4");
tvDescription = findViewById(R.id.tvDescription);
}
#Override
public void onItemSelected(int index) {
tvDescription.setText(Descriptions.get(index));
}}
list_fragment
public class list_Fragment extends ListFragment {
ArrayList<String> Data = new ArrayList<String>();
ItemSelected activity;
public interface ItemSelected{
void onItemSelected(int index);
}
public list_Fragment() {
// Required empty public constructor
}
#Override
public void onAttach(#NonNull Context context) {
super.onAttach(context);
activity=(ItemSelected) context;
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
Data.add("Item 1");
Data.add("Item 2");
Data.add("Item 3");
Data.add("Item 4");
setListAdapter(new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, Data));
}
#Override
public void onListItemClick(#NonNull ListView l, #NonNull View v, int position, long id) {
activity.onItemSelected(position);
}
}
and the details Fragment code, where i am getting the error i believe, is
public class DetailsFragment extends Fragment {
public DetailsFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return (LinearLayout) inflater.inflate(R.layout.fragment_details, container, false);
}
}
Main XML file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/ll_Horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
tools:context=".MainActivity">
<androidx.fragment.app.FragmentContainerView
android:id="#+id/listfragmentView"
android:name="com.example.fragmentcheck.list_Fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="3"
android:background="#android:color/holo_blue_dark"
tools:layout="#layout/fragment_list_" />
<androidx.fragment.app.FragmentContainerView
android:id="#+id/detailsfragmentView"
android:name="com.example.fragmentcheck.DetailsFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#color/purple_200"
tools:layout="#layout/fragment_details" />
</LinearLayout>
ListFragment XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/linearLayout2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/design_default_color_primary_variant"
android:orientation="vertical"
tools:context=".list_Fragment">
<ListView
android:id="#+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
DetailsFragment XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/design_default_color_on_secondary"
android:orientation="vertical"
tools:context=".DetailsFragment">
<TextView
android:id="#+id/tvDescription"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/textview"
android:textColor="#FFFFFF"
android:textSize="20sp" />
</LinearLayout>
Error
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.fragmentcheck, PID: 28112
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object r*emphasized text*eference
at com.example.fragmentcheck.MainActivity.onItemSelected(MainActivity.java:34)
at com.example.fragmentcheck.list_Fragment.onListItemClick(list_Fragment.java:54)
tvDescription is in the DetailsFragment layout, you need to do any layout configuration in the code for that Class
i.e.
class DetailsFragment extends Fragment {
...
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_details, container, false)
tvDescription = view.findViewById(R.id.tvDescription);
tvDescription.setText("some text");
return view
}
}
You have tvDescription in DetailsFragment xml, while you are finding it's id in MainAcitvity. MainActivity just have FragmentContainerView , it doen't have any text view inside it.
You need to inflate the Fragment's view and call findViewById() on the View it returns.
Updated DetailsFragment
public class DetailsFragment extends Fragment {
TextView tvDescription;
public DetailsFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_details, container, false)
tvDescription = view.findViewById(R.id.tvDescription);
tvDescription.setText("some text");
return view
}
}
Change both: androidx.fragment.app.FragmentContainerView
To: fragment
In the main_activity xml
I have an xml layout file called fragment_about_sl.xml and the class associated to that called aboutSLFragment.java which is extended to fragment.java. Anyway all I want to do is make the toolbar transparent and overlay the image for this class only.I am new to android, so please help.
fragment_about_sl.xml
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/aboutslscrollview"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.navigationdrawerfragments.aboutSLFragment">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="250dp" />
<LinearLayout
android:id="#+id/SliderDots"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="#id/viewPager"
android:layout_marginBottom="20dp"
android:gravity="center_horizontal"
android:orientation="horizontal" />
</RelativeLayout>
</LinearLayout>
</ScrollView>
aboutSlFragment.java
public class aboutSLFragment extends Fragment{
ViewPager viewPager;
LinearLayout sliderDotspanel;
private int dotscount;
private ImageView[] dots;
TextView aboutsltext;
Button readmorebtn;
public aboutSLFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_about_sl, container,
false);
viewPager = (ViewPager) rootView .findViewById(R.id.viewPager);
sliderDotspanel = (LinearLayout)rootView.findViewById(R.id.SliderDots);
ViewPagerAdapter viewPagerAdapter = new ViewPagerAdapter(getContext());
viewPager.setAdapter(viewPagerAdapter);
dotscount = viewPagerAdapter.getCount();
dots = new ImageView[dotscount];
for(int i = 0; i < dotscount; i++){
dots[i] = new ImageView(getContext());
dots[i].setImageDrawable(ContextCompat.getDrawable(getContext(),
R.drawable.non_active_dot));
LinearLayout.LayoutParams params = new
LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
params.setMargins(8, 0, 8, 0);
sliderDotspanel.addView(dots[i], params);
}
dots[0].setImageDrawable(ContextCompat.getDrawable(getContext(),
R.drawable.active_dot));
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int
positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
for(int i = 0; i< dotscount; i++){
dots[i].setImageDrawable(ContextCompat.getDrawable(getContext(),
R.drawable.non_active_dot));
}
dots[position].setImageDrawable(ContextCompat.getDrawable(getContext(),
R.drawable.active_dot));
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
aboutsltext=(TextView)rootView.findViewById(R.id.aboutsltext);
readmorebtn=(Button)rootView.findViewById(R.id.readmorebtn);
readmorebtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (readmorebtn.getText().toString().equalsIgnoreCase("Read More"))
{
aboutsltext.setMaxLines(Integer.MAX_VALUE);//your TextView
readmorebtn.setText("Read Less");
}
else
{
aboutsltext.setMaxLines(3);//your TextView
readmorebtn.setText("Read More");
}
}
});
// Inflate the layout for this fragment
return rootView;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
//you can set the title for your toolbar here for different fragments
different titles
getActivity().setTitle("About Sri Lanka");
}
I want my app to be like this
You can do that in onResume of that fragment:
#Override
public void onResume() {
super.onResume();
AppCompatActivity activity = (AppCompatActivity) getActivity();
ActionBar actionBar = activity.getSupportActionBar();
actionBar.hide();
}
I have created tabbed activity with two tab (edittext in tab1,listview in tab2),and I pass data in tab1 to listview in tab2, how to set title for listview
please help
my xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="store.exercise.com.store.MainActivity$PlaceholderFragment">
<ListView
android:id="#+id/list_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
fragment one:
public class FragmentOne extends Fragment {
SendMessage SM;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(
R.layout.fragment_one, container, false);
return rootView;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
Button btnPassData = (Button) view.findViewById(R.id.btnPassData);
final EditText inData = (EditText) view.findViewById(R.id.inMessage);
btnPassData.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
SM.sendData(inData.getText().toString().trim());
}
});
}
interface SendMessage {
void sendData(String message);
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
try {
SM = (SendMessage) getActivity();
} catch (ClassCastException e) {
throw new ClassCastException("Error in retrieving data. Please try again");
}
}
}
fragment two :
public class FragmentTwo extends Fragment {
ListView listView;
ArrayList<String> arrayList = new ArrayList<>();
ArrayAdapter<String> adapter;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(
R.layout.fragment_two, container, false);
return rootView;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
listView = (ListView) view.findViewById(R.id.list_view);
adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, arrayList);
listView.setAdapter(adapter);
}
protected void displayReceivedData(String message) {
arrayList.add(message);
adapter.notifyDataSetChanged();
}
}
my ViewPagerAdapter :
public class ViewPagerAdapter extends FragmentPagerAdapter {
public ViewPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
Fragment fragment = null;
if (position == 0) {
fragment = new FragmentOne();
} else if (position == 1) {
fragment = new FragmentTwo();
}
return fragment;
}
#Override
public int getCount() {
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
String title = null;
if (position == 0) {
title = " مهمة جديدة ";
} else if (position == 1) {
title = " المهام ";
}
return title;
}
}
make sure you have the following on your activity_view.xml where you have your viewpager
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="#dimen/center_section_tab_bar_header_height"
app:tabGravity="fill"
app:tabMode="fixed" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="fill_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
and in your activity class add the following line to setup the viewpager with the tab layout header
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(yourviewpager);
after which it sets up the header for your tabs as mentioned in your code
I have downloaded the library and properly included into my android studio project
I am not able to see Circle indicator even after using library:
Here is my code:
MAIN FILE:
public class MyActivity extends FragmentActivity implements OnPageChangeListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
List<Fragment> list = new ArrayList<Fragment>();
list.add(new MyFragment());
list.add(new MyFragment());
list.add(new MyFragment());
MyPagerAdapter a = new MyPagerAdapter(getSupportFragmentManager(), list);
ViewPager pager = (ViewPager) findViewById(R.id.viewpager);
pager.setAdapter(a);
CirclePageIndicator mIndicator = (CirclePageIndicator)findViewById(R.id.indicator);
mIndicator.setViewPager(pager);
}
MyPagerAdapter.java
public class MyPagerAdapter extends FragmentPagerAdapter {
List<Fragment> fragments;
public MyPagerAdapter(FragmentManager fm,List<Fragment> f) {
super(fm);
this.fragments = f;
}
#Override
public Fragment getItem(int arg0) {
return fragments.get(arg0);
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return fragments.size();
}
}
MyFragment:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanse) {
final View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
activity_my.xml
<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.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<com.viewpagerindicator.CirclePageIndicator
android:id="#+id/indicator"
android:padding="10dip"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
</android.support.v4.view.ViewPager>
</RelativeLayout>
fragment_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/gallery"
android:src="#drawable/pic1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
Output:
I want to add and replace Frame layout with fragment on fragment-1 and fragment-2 on item click of Grid and List item.
I had created main.xml class
<?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" >
<LinearLayout
android:layout_width="0dp"
android:layout_weight="1"
android:orientation="vertical"
android:layout_height="fill_parent" >
<fragment
android:id="#+id/fragment1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
class="com.example.fragment.Fragment1" />
<View
android:layout_width="fill_parent"
android:layout_height="1dp"
android:background="#000000" />
<fragment
android:id="#+id/fragment2"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
class="com.example.fragment.Fragment2" />
</LinearLayout>
<View
android:layout_width="1dp"
android:layout_height="fill_parent"
android:background="#000000" />
<FrameLayout
android:id="#+id/fragment3"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="2"/>
Here is my fragment_1.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingLeft="8dp"
android:paddingRight="8dp" >
<GridView
android:id="#+id/Grid1"
android:layout_width="match_parent"
android:numColumns="auto_fit"
android:columnWidth="100dp"
android:layout_height="0dp"
android:layout_weight="1"
android:drawSelectorOnTop="false" />
and here is my row_fragment1_list.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:layout_margin="15dp"
android:orientation="vertical" >
<ImageView
android:id="#+id/img_view"
android:layout_width="50dp"
android:layout_height="50dp"
android:background="#CCCCCC"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:id="#+id/text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp" />
and fragment_3.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:id="#+id/tv_fragment3"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="22sp"
android:gravity="center"
android:text="This is 3rd Fragment" />
and here is my Main.xml
public class Main extends Activity
{
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
and here is Fragment1.class
public class Fragment1 extends Fragment implements OnItemClickListener
{
Activity myActivity;
GridView mGridView;
private String ListItem[] = {"Item 1","Item 2","Item 3","Item 4","Item 5","Item 6","Item 7"};
private int imgID[] = {R.drawable.admin_access_rule,
R.drawable.admin_backup,R.drawable.admin_browsesite,
R.drawable.admin_comment_post,R.drawable.admin_content,
R.drawable.admin_content_type,R.drawable.admin_logout,};
#Override
public void onAttach(Activity activity)
{
super.onAttach(activity);
this.myActivity = activity;
Toast.makeText(activity.getApplicationContext(), "On Attach", Toast.LENGTH_SHORT).show();
}
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
Toast.makeText(myActivity.getApplicationContext(), "On Create", Toast.LENGTH_SHORT).show();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
Toast.makeText(myActivity.getApplicationContext(), "On Create View", Toast.LENGTH_SHORT).show();
View view = inflater.inflate(R.layout.fragment_1,container, false);
mGridView = (GridView)view.findViewById(R.id.Grid1);
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState)
{
Toast.makeText(myActivity.getApplicationContext(), "On Activity Created", Toast.LENGTH_SHORT).show();
super.onActivityCreated(savedInstanceState);
}
#Override
public void onStart()
{
super.onStart();
mGridView.setAdapter(new GridBaseAdapter(myActivity));
mGridView.setOnItemClickListener(this);
}
private class GridBaseAdapter extends BaseAdapter
{
LayoutInflater mLayoutInflater = null;
public GridBaseAdapter(Context mContext)
{
mContext = myActivity;
mLayoutInflater = LayoutInflater.from(mContext);
}
#Override
public int getCount()
{
return ListItem.length;
}
#Override
public Object getItem(int position)
{
return null;
}
#Override
public long getItemId(int position)
{
return ListItem.length;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent)
{
if(convertView == null)
{
convertView = mLayoutInflater.inflate(R.layout.row_fragment_list, null);
}
ImageView mImageView = (ImageView) convertView.findViewById(R.id.img_view);
mImageView.setImageResource(imgID[position]);
TextView tvUserEmail = (TextView) convertView.findViewById(R.id.text2);
tvUserEmail.setText("Sub " +ListItem[position]);
return convertView;
}
}
#Override
public void onItemClick(AdapterView<?> arg0, View view, int position, long id)
{
TextView txt3 = (TextView)myActivity.findViewById(R.id.tv_fragment3);
txt3.setText("1st Fragment's : " + position +" Item Clicked");
}
}
My Fragment2.class
public class Fragment2 extends ListFragment
{
Activity myActivity;
private String ListItem[] = {"Item 1","Item 2","Item 3","Item 4","Item 5","Item 6","Item 6","Item 7"};
#Override
public void onAttach(Activity activity)
{
super.onAttach(activity);
this.myActivity = activity;
Toast.makeText(activity.getApplicationContext(), "On Attach", Toast.LENGTH_SHORT).show();
}
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
Toast.makeText(myActivity.getApplicationContext(), "On Create", Toast.LENGTH_SHORT).show();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
Toast.makeText(myActivity.getApplicationContext(), "On Create View", Toast.LENGTH_SHORT).show();
/** Creating an array adapter to store the list of countries **/
ArrayAdapter<String> adapter = new ArrayAdapter<String>(inflater.getContext(), android.R.layout.simple_list_item_1,ListItem);
/** Setting the list adapter for the ListFragment */
setListAdapter(adapter);
return super.onCreateView(inflater, container, savedInstanceState);
}
#Override
public void onActivityCreated(Bundle savedInstanceState)
{
Toast.makeText(myActivity.getApplicationContext(), "On Activity Created", Toast.LENGTH_SHORT).show();
super.onActivityCreated(savedInstanceState);
}
#Override
public void onListItemClick(ListView l, View v, int position, long id)
{
Toast.makeText(myActivity.getApplicationContext(), position +" Item Clicked", Toast.LENGTH_SHORT).show();
TextView txt3 = (TextView)myActivity.findViewById(R.id.tv_fragment3);
txt3.setText("2nd Fragment's : " + position +" Item Clicked");
super.onListItemClick(l, v, position, id);
}
}
And Last my Fragment3.class
public class Fragment3 extends Fragment
{
Activity myActivity;
TextView txt_view;
#Override
public void onAttach(Activity activity)
{
super.onAttach(activity);
this.myActivity = activity;
Toast.makeText(activity.getApplicationContext(), "On Attach", Toast.LENGTH_SHORT).show();
}
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
Toast.makeText(myActivity.getApplicationContext(), "On Create", Toast.LENGTH_SHORT).show();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
Toast.makeText(myActivity.getApplicationContext(), "On Create View", Toast.LENGTH_SHORT).show();
View view = inflater.inflate(R.layout.fragment_3,container, false);
txt_view = (TextView)view.findViewById(R.id.tv_fragment3);
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState)
{
Toast.makeText(myActivity.getApplicationContext(), "On Activity Created", Toast.LENGTH_SHORT).show();
super.onActivityCreated(savedInstanceState);
}
}
Make fragments expose interface that your activity can attach itself to. The event should occur when desired (e.g. list item is clicked). Then, activity should place instance of the fragment where it should be, for example:
// fragment is an instance of the fragment you want to show
final FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.fragment3, fragment);
transaction.commit();