Passing values from MainActivity to a Java_Class that extends Fragment fails

Passing values from MainActivity to a Java_Class that extends Fragment fails - java

To more understand more how fragments work, I created a mainactivity its layout has one<fragment>. and I created two java classes extend fragment and each of these classes has its own layout.
In the java class that extends fragment, I initailise my views textview inside onActivityCreated(), and as shown below in the code in the same class, i created two methods setbtnclicks(int clicks) and getbtnclicks(). From the mainactivity i assign number of clicks of a button to setbtnclicks() and i try to display the number of clicks on the textview of the class that extends fragment by calling getbtnclicks from inside onActivivtyCreated(). But the problem is, this method always displays zero, as if the number of clicks are not incremented.
MainActivtity:
//global variable
private int i = 0;
...
...
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Fragment mSelectedFragment;
FragmentManager mFragmentManager;
FragmentTransaction mFragmentTransaction;
switch (v.getId()) {
case R.id.btn00:
mSelectedFragment = new Fragment00();
mFragmentManager = getFragmentManager();
mFragmentTransaction = mFragmentManager.beginTransaction();
mFragmentTransaction.replace(R.id.fragment00ID, mSelectedFragment);
mFragmentTransaction.commit();
mFragment00.setBtnClicks(i);
i++;
break;
Java_Class "Fragment00"
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
Log.d(TAG, "onActivityCreated(): "+order);
order++;
mTv = (TextView) getView().findViewById(R.id.fragment00Tv00);
mTv.setText("the Button was clicked "+getBtnClicks()+ " time(s)");
Log.i(TAG, "onActivityCreated(): "+getBtnClicks());
}

Once i have implemented a more or less same program like yours.The objective was to increment the number of button clicks in both the fragments.Here is the code.Hope it helps:
MainActivity.java
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
public class MainActivity extends Activity implements OnClickListener{
Button btn1,btn2;
int click1=0,click2=0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn1=(Button)findViewById(R.id.btn1);
btn2=(Button)findViewById(R.id.btn2);
btn1.setOnClickListener(this);
btn2.setOnClickListener(this);
}
#SuppressLint("NewApi")
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Fragment fragment = null;
if (v == btn1) {
// do stuff for button left
click1++;
Bundle bundle=new Bundle();
String clickstring1=Integer.toString(click1);
bundle.putString("name1",clickstring1 );
fragment = new FragButton1();
fragment.setArguments(bundle);
}
if (v == btn2) {
// do stuff for button right
click2++;
Bundle bundle=new Bundle();
String clickstring2=Integer.toString(click2);
bundle.putString("name2",clickstring2 );
fragment = new FragButton2();
fragment.setArguments(bundle);
}
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).commit();
}
else{
Log.e("MainActivity", "Error in creating fragment");
}
}
}
FragButton1.java
import android.annotation.SuppressLint;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
#SuppressLint("NewApi")
public class FragButton1 extends Fragment{
TextView tv;
public FragButton1(){}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragbutton1, container, false);
String strtext=getArguments().getString("name1");
tv=(TextView)rootView.findViewById(R.id.tv_times1);
tv.setText(strtext);
return rootView;
}
}
FragButton2.java
import android.annotation.SuppressLint;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
#SuppressLint("NewApi")
public class FragButton2 extends Fragment{
TextView tv2;
public FragButton2(){}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragbutton2, container, false);
tv2=(TextView)rootView.findViewById(R.id.tv_times2);
String strtext=getArguments().getString("name2");
tv2.setText(strtext);
return rootView;
}
}
Here there are 2 buttons and onclick of a button a new fragment will be launched and the fragment will display the number of times a button is clicked in a textview.

increment i before the fragment Transaction
switch (v.getId()) {
case R.id.btn00:
i++;
mSelectedFragment = new Fragment00();
mFragmentManager = getFragmentManager();
mFragmentTransaction = mFragmentManager.beginTransaction();
mFragmentTransaction.replace(R.id.fragment00ID, mSelectedFragment);
mFragmentTransaction.commit();
mFragment00.setBtnClicks(i);
break;

Related

Fragment translation and phone orientation bug

Phone's orientation and fragment translation bug.
I have an activity and some fragments. The first fragment comes right away over the activity with a logo and after 3 seconds the second fragment translates over. The problem is if I change the orientation of the phone, the 1st fragment reappears with the same delay and same behavior as I start the app.
MainActivity:
package com.mainpackage.pinbook;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.mainpackage.pinbook.com.autentification.LoginFragment;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container , new MainScreen());
fragmentTransaction.commit();
}
}
MainScreen:
package com.mainpackage.pinbook;
import android.os.Bundle;
import android.os.Handler;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.mainpackage.pinbook.com.autentification.*;
public class MainScreen extends Fragment{
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.main_screen , container , false);
}
private TextView entry_text;
public static final String TAG = MainScreen.class.getSimpleName();
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
slide();
}
}, 3000);
}
private void slide(){
FragmentTransaction fragmentTransaction = getActivity().getSupportFragmentManager().beginTransaction();
fragmentTransaction.setCustomAnimations(0,R.anim.slide_in_left);
fragmentTransaction.replace(R.id.main_container , new LoginFragment());
fragmentTransaction.commit();
}
#Override
public void onStop() {
super.onStop();
((AppCompatActivity)getActivity()).getSupportActionBar().show();
}
#Override
public void onResume() {
super.onResume();
((AppCompatActivity)getActivity()).getSupportActionBar().hide();
}
}
The second fragment can be blank.
What I want is simply to remain on the current fragment when I change the phone's orientation

When the device rotates onCreate() gets called again.
Wrap your fragment transaction in onCreate() like so:
if (savedInstanceState == null) {
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container , new MainScreen());
fragmentTransaction.commit();
}
This will prevent the first fragment from being put back on top when you rotate.

Android Studio: Unable to remove fragment

I'm trying to remove a fragment and it's not working.
I've been checking with logcat and it's noticing that the button's been clicked and that message is being passed to the main activity. I assume there's something wrong with my code but I can't figure out what that is. Would appreciate some help.
MainMenu.java
package com.example.android.learninstrumentation;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
public class MainMenu extends AppCompatActivity implements MainMenuStFrag.MainMenuStFragListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_menu);
//Create a new Fragment to be placed in the Activity layout
Fragment menuSiFragment = new MainMenuSiFrag();
Fragment menuStFragment = new MainMenuStFrag();
//Add the fragment to the 'fragment_container' layout
getSupportFragmentManager().beginTransaction().add(R.id.fragment_type_si_container, menuSiFragment).commit();
getSupportFragmentManager().beginTransaction().add(R.id.fragment_type_st_container, menuStFragment).commit();
}
//The user clicked 'expand' from MainMenuStFrag. Remove MainMenuSiFrag.
public void onExpandClick () {
Log.i("MainMenu", "Click message received");
Fragment oldFragment = new MainMenuSiFrag();
getSupportFragmentManager().beginTransaction().remove(oldFragment).addToBackStack(null).commit();
}
public void onCheckboxClick() {
}
}
MainMenuStFrag.java
package com.example.android.learninstrumentation;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.CheckBox;
import android.widget.ImageView;
public class MainMenuStFrag extends Fragment implements View.OnClickListener{
MainMenuStFragListener mCallback;
//Inflate the layout and set buttons for this fragment
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//Store the Fragment in the mainMenu variable
View mainMenu = inflater.inflate(R.layout.main_menu_st_fragment, container, false);
//Define the buttons and set onClickListeners
ImageView expand = mainMenu.findViewById(R.id.mainMenu_imageView_SelectTopics);
expand.setOnClickListener(this);
CheckBox checkBox = mainMenu.findViewById(R.id.mainMenu_CheckBox_SelectAllTopics);
checkBox.setOnClickListener(this);
return mainMenu;
}
//Interface for communication with container Activity
public interface MainMenuStFragListener {
void onExpandClick();
void onCheckboxClick();
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
//This makes sure the container Activity has implemented the callback interface.
// If not, it throws an exception.
try {
mCallback = (MainMenuStFragListener) context;
} catch (ClassCastException e) {
throw new ClassCastException(context.toString()
+ " must implement OnHeadlineSelectedListener");
}
}
//onClick actions
#Override public void onClick(View v) {
switch (v.getId()) {
//Remove the other 'type' item
case R.id.mainMenu_imageView_SelectTopics:
Log.i("MainMenuStFrag", "Topics>Expand=Clicked");
mCallback.onExpandClick();
break;
case R.id.mainMenu_CheckBox_SelectAllTopics:
mCallback.onCheckboxClick();
break;
}
}
}
MainMenuSiFrag.java
package com.example.android.learninstrumentation;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class MainMenuSiFrag extends Fragment {
//Inflate the layout for this fragment
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View mainMenu = inflater.inflate(R.layout.main_menu_si_fragment, container, false);
return mainMenu;
}
}

You have created new instance of Fragment for remove Fragment
public void onExpandClick () {
Log.i("MainMenu", "Click message received");
Fragment oldFragment = new MainMenuSiFrag();
getSupportFragmentManager().beginTransaction().remove(oldFragment).addToBackStack(null).commit();
}
instead on that Find a fragment and remove it from container
Fragment oldFragment=getSupportFragmentManager().findFragmentById(R.id.fragment_type_si_container);
if(oldFragment!=null && oldFragment instanceof MainMenuSiFrag)
{
getSupportFragmentManager()
.beginTransaction().
remove(oldFragment).commit();
}

Why my app closed when i click button on my fragment to go to another fragment page

I can run this code , but when i click button on my checkbalance layout , my app closed ,can someone help me pls, my checkbalance actually is a fragment from my navigation drawer activity,my idea is when i click the button on check balance,it will go to makepayment page
Checkbalance.java
package com.helloworld.basikal;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
/**
* Created by LENOVO on 8/21/2017.
*/
public class CheckBalance extends Fragment{
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
getActivity().setTitle("Check Balance");
Button button = (Button) getView().findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getActivity(), MadePayment.class);
getActivity().startActivity(intent);
}
});
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.checkbalance,container,false);
}
}
Madepayment.java
package com.helloworld.basikal;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* Created by LENOVO on 8/24/2017.
*/
public class MadePayment extends Fragment{
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup
container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.madepayment, container, false);
Intent intent = getActivity().getIntent();
return view;
}
}

It seems that class MadePayment is a fragment. But you treated it as a activity.
// error code start here
Intent intent = new Intent(getActivity(), MadePayment.class);
getActivity().startActivity(intent);
// end
Correct it as follows
/* Add this method in your host Activity */
public void attachFragment(Fragment fragment) {
if (null == fragment) {
return;
}
try {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.fragContainer, fragment);
/* add to back stack */
//ft.addToBackStack(null);
ft.commitAllowingStateLoss();
} catch (Exception e) {
}
}
And replace the fragmet
MadePayment fragment = new MadePayment;
MainActivity hostActivity= (MainActivity)getActivity();
hostActivity.attachFragment(homeFragment);

The MadePayment is a fragment. Use FragmentTransactions to replace the fragment.
Button button = (Button) getView().findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Fragment newfragment= new newFragment();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.fragmentframe_container, newfragment);
transaction.addToBackStack(null);
transaction.commit();
}
});

Simple ActionBarSherlock error with Fragments

When writing this code I am having a constant error where it says "Type mismatch: cannot convert from Fragment_1 to Fragment" on the three lines like this "Fragment Fragment1 = new Fragment_1();". I believe this is the problem that is also causing my fragments to not appear when the code is run because the code doesn't know what corresponds to the Listener.
import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.ActionBar.Tab;
import com.actionbarsherlock.app.SherlockFragmentActivity;
import android.os.Bundle;
import android.app.Activity;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.Fragment;
import android.view.Menu;
public class MainActivity extends SherlockFragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ActionBar actionbar = getSupportActionBar();
actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionbar.setTitle("TabApp");
ActionBar.Tab Frag1Tab = actionbar.newTab().setText("Tab 1");
ActionBar.Tab Frag2Tab = actionbar.newTab().setText("Tab 2");
ActionBar.Tab Frag3Tab = actionbar.newTab().setText("Tab 3");
Fragment Fragment1 = new Fragment_1();
Fragment Fragment2 = new Fragment_2();
Fragment Fragment3 = new Fragment_3();
Frag1Tab.setTabListener(new MyTabsListener(Fragment1));
Frag2Tab.setTabListener(new MyTabsListener(Fragment2));
Frag3Tab.setTabListener(new MyTabsListener(Fragment3));
actionbar.addTab(Frag1Tab);
actionbar.addTab(Frag2Tab);
actionbar.addTab(Frag3Tab);
}
class MyTabsListener implements ActionBar.TabListener {
public Fragment fragment;
public MyTabsListener(Fragment fragment){
this.fragment = fragment;
}
#Override
public void onTabSelected(Tab tab, android.support.v4.app.FragmentTransaction ft) {
// TODO Auto-generated method stub
ft.replace(R.id.fragment_container, fragment);
}
#Override
public void onTabUnselected(Tab tab, android.support.v4.app.FragmentTransaction ft) {
// TODO Auto-generated method stub
}
#Override
public void onTabReselected(Tab tab, android.support.v4.app.FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
}
Here is the Fragment_1 class:
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Fragment_1 extends Fragment{
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
return inflater.inflate(R.layout.fragment_1, container, false);
}
}

Is Fragment_1 inheriting from android.support.v4.app.Fragment(or SherlockFragment)? Or does it inherit from android.app.Fragment? It should be android.support.v4.app.Fragment

ActionBarSherlock and FragmentTabsPager

As a lot of people have been doing so far, I'm implementing the FragmentTabsPager into my app, which is using ActionBarSherlock 4.0. However, I'm lost.
Fragments, and all of Google's little ideas, plans and methods surrounding it, are confusing me. If anyone could take a look at my code and walk me through this, providing help in making it work, I would thank them a thousand times :D.
I have another project with a sort-of beginning for a ViewPager, but the Tabs just mix better, especially with them being in the ActionBar on landscape and tablets.
My code is all zipped up and ready to go over here:
http://dl.dropbox.com/u/21807195/Antonius%20College%202.zip
Thanks in advance!

I will show you my code that has a ViewPager, TabListener, and system of Fragments linked to each tab. It implements ABS, but as of yet, still crashes on Gingerbread and lower (works beautifully on ICS, though):
import java.util.ArrayList;
import library.DatabaseHandler;
import org.json.JSONObject;
import com.actionbarsherlock.R;
import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.ActionBar.Tab;
import com.actionbarsherlock.app.SherlockFragmentActivity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.View.OnClickListener;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
public class Polling extends SherlockFragmentActivity {
private ViewPager mViewPager;
private TabsAdapter mTabsAdapter;
private final static String TAG = "21st Polling:";
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mViewPager = new ViewPager(this);
mViewPager.setId(R.id.pager);
setContentView(mViewPager);
ActionBar bar = getSupportActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
bar.setDisplayShowTitleEnabled(false);
bar.setDisplayShowHomeEnabled(false);
mTabsAdapter = new TabsAdapter(this, mViewPager);
mTabsAdapter.addTab(bar.newTab().setText(R.string.login),
LoginFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.economics),
EconFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.elections),
ElectionsFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.politics),
PoliticsFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.science),
ScienceFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.finance),
FinanceFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.religion),
ReligionFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.military),
MilitaryFragment.class, null);
mTabsAdapter.addTab(bar.newTab().setText(R.string.international),
InternationalFragment.class, null);
Log.v(TAG, (String)bar.getTabAt(0).getText());
}
public static class TabsAdapter extends FragmentPagerAdapter
implements ActionBar.TabListener, ViewPager.OnPageChangeListener {
private final Context mContext;
private final ActionBar mActionBar;
private final ViewPager mViewPager;
private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
static final class TabInfo {
private final Class<?> clss;
private final Bundle args;
TabInfo(Class<?> _class, Bundle _args) {
clss = _class;
args = _args;
}
}
public TabsAdapter(SherlockFragmentActivity activity, ViewPager pager) {
super(activity.getSupportFragmentManager());
mContext = activity;
mActionBar = activity.getSupportActionBar();
mViewPager = pager;
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {
TabInfo info = new TabInfo(clss, args);
tab.setTag(info);
tab.setTabListener(this);
mTabs.add(info);
mActionBar.addTab(tab);
notifyDataSetChanged();
}
public int getCount() {
return mTabs.size();
}
public SherlockFragment getItem(int position) {
TabInfo info = mTabs.get(position);
return (SherlockFragment)Fragment.instantiate(mContext, info.clss.getName(), info.args);
}
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
public void onPageSelected(int position) {
mActionBar.setSelectedNavigationItem(position);
}
public void onPageScrollStateChanged(int state) {
}
public void onTabSelected(Tab tab, FragmentTransaction ft) {
mViewPager.setCurrentItem(tab.getPosition());
//Log.v(TAG, "clicked");
Object tag = tab.getTag();
for (int i=0; i<mTabs.size(); i++) {
if (mTabs.get(i) == tag) {
mViewPager.setCurrentItem(i);
}
}
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {}
public void onTabReselected(Tab tab, FragmentTransaction ft) {}
public void onTabReselected(Tab tab, android.app.FragmentTransaction ft) {}
public void onTabUnselected(Tab tab, android.app.FragmentTransaction ft) {}
}
And here is what one fragment looks like:
package com.davekelley.polling;
import com.actionbarsherlock.R;
import com.actionbarsherlock.app.SherlockFragment;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class MilitaryFragment extends SherlockFragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.militaryfragment, container, false);
}
}
My last note would that my code still has one other issue: individual fragments do not always reload their interface after the user press back (which results in removing the entire app from the screen, regardless which tab/fragment they are on, because I have no backStack). So that's what I'm working through now. I think once I have that sorted, I'll try to figure out why I still don't have Gingerbread execution functioning properly. Either way, I hope looking through this code helps you out.
Here is a fragment with some onClickListeners:
import com.actionbarsherlock.R;
import com.actionbarsherlock.app.SherlockFragment;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
import android.widget.Toast;
public class LoginFragment extends SherlockFragment {
Button loginButton;
Button registerButton;
Polling activity;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.loginfragment, container, false);
return v;
}
public void onResume() {
super.onResume();
Log.d("Econ", "onresume");
loginButton = (Button) getActivity().findViewById(R.id.loginButton);
loginButton.setOnClickListener(loginListener);
registerButton = (Button) getActivity().findViewById(R.id.registerButton);
registerButton.setOnClickListener(registerListener);
}
public OnClickListener loginListener = new OnClickListener() {
#Override
public void onClick(View v) {
if(loginButton.getText().toString() == "Log Out") {
activity.loginReport(2);
loginButton.setText(R.string.login);
//Remove user from dB sqllite when I know how
}
else {
Log.v("LoginF", "onclick");
ProgressDialog progressDialog = new ProgressDialog(getActivity());
progressDialog.setMessage("Logging in...");
LoginTask loginTask = new LoginTask((Polling) getActivity(), progressDialog);
loginTask.execute();
}
}
};
public OnClickListener registerListener = new OnClickListener() {
#Override
public void onClick(View v) {
Log.v("Register", "onclick");
ProgressDialog progressDialog = new ProgressDialog(getActivity());
progressDialog.setMessage("Registering new user...");
RegisterTask registerTask = new RegisterTask((Polling) getActivity(), progressDialog);
registerTask.execute();
}
};
public void onAttach(Activity activity) {
super.onAttach(activity);
this.activity = (Polling) activity;
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
public void onStart() {
super.onStart();
Log.d("Econ", "onstart");
}
public void onPause() {
super.onPause();Log.d("Econ", "onpause");
}
public void onStop() {
super.onStop();
Log.d("Econ", "onstop");
}
public void onDestroyView() {
super.onDestroyView();
Log.d("Econ", "ondestroyview");
}
public void onDestroy() {
super.onDestroy();
Log.d("Econ", "ondestroy");
}
public void onDetach() {
super.onDetach();
Log.d("Econ", "ondetach");
}
}
The loginTask objects that you see are actually classes that extend ASyncTask - they handle connecting to my server and registering/logging in.
I thought it would be helpful to add in one bit more of code. This is another one of my fragments, like LoginFragment, but it inflates a UI a little differently. Eventually, what you see in the while loop below, will head into an ASyncTask to acquire each question from the server, rather than the dummy string array you see:
public class EconFragment extends SherlockFragment {
private TableLayout questionContainer;
int pos = 0;
private String[] titles = {"The first title ", "hallo1","hallo2", "hallo3",
"hallo4", "hallo5","hallo6", "hallo7","hallo8", "hallo9"};
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.v("Econ", "onCreateView");
View v = inflater.inflate(R.layout.econfragment, container, false);
questionContainer = (TableLayout) v.findViewById(R.id.questionContainer);
//bs
int leftMargin=5;
int topMargin=5;
int rightMargin=5;
int bottomMargin=5;
while (pos < 10) {
View question = inflater.inflate(R.layout.question, null);
question.setId(pos);
TextView title = (TextView) question.findViewById(R.id.questionTextView);
title.setText(titles[pos]);
Button charts = (Button) question.findViewById(R.id.chartsButton);
charts.setId(pos);
charts.setOnClickListener(chartsListener);
TableRow tr = (TableRow) question;
TableLayout.LayoutParams trParams = new TableLayout.LayoutParams(
TableLayout.LayoutParams.MATCH_PARENT,
TableLayout.LayoutParams.WRAP_CONTENT);
trParams.setMargins(leftMargin, topMargin, rightMargin, bottomMargin);
tr.setLayoutParams(trParams);
Log.v("econ", "while loop");
questionContainer.addView(tr);
pos++;
}
pos = 0;
return v;
}

I have ported the FragmentTabsPager Activity and associated Fragments from "Support4Demos" (Android Support library sample) to use ActionBarSherlock and true ActionBar Tabs. The sample includes an Activity that uses both a ViewPager and Tabs to switch between Fragments. The Fragments contain three kinds of ListViews. I've tested it from ICS down to Eclair (2.1). You can browse or download the code at http://code.google.com/p/sherlock-demo/.

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