Develop Reference

Didn't know how to get the current location and show nearby car services(workshops)

I have a google maps in one fragment in my app. How can I get the current location and show nearby car services?
package com.example.easyauto;
import android.location.Location;
import android.os.Bundle;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapView;
import com.google.android.gms.maps.MapsInitializer;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class HartaFragment extends Fragment implements OnMapReadyCallback {
View view; // for the view
GoogleMap map; // for the GoogleMaps
MapView mapView;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_harta, container, false);
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mapView = view.findViewById(R.id.mapsView);
if(mapView != null){
mapView.onCreate(null);
mapView.onResume();
mapView.getMapAsync(this);
}
}
#Override
public void onMapReady(GoogleMap googleMap) {
MapsInitializer.initialize(getContext());
map = googleMap; // show the maps ok
}
}
This is the code I wrote for now. It all works fine. Do I need also to put tha map_fragment.xml here for more details?
I also added the meta-data for google maps and the implementation 'com.google.android.gms:play-services-maps:16.1.0',

As
map.getMyLocation()
is depracated you can try this:
public Location getLocation() {
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
if (locationManager != null) {
Location lastKnownLocationGPS = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (lastKnownLocationGPS != null) {
return lastKnownLocationGPS;
} else {
return locationManager.getLastKnownLocation(LocationManager.PASSIVE_PROVIDER);
}
} else {
return null;
}
}
And dont forget about permissions (runtime and in manifest).

NullPointerException - Android Google Maps Street View

I am trying to display a street view in a fragment.
public class StreetDisplay extends Fragment implements OnStreetViewPanoramaReadyCallback{
SupportStreetViewPanoramaFragment streetFrag;
static final LatLng PosOne = new LatLng(43.771925, -79.512460);
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.street_display, container, false);
initialize();
return v;
}
private void initialize() {
streetFrag =
(SupportStreetViewPanoramaFragment) getFragmentManager()
.findFragmentById(R.id.street);
streetFrag.getStreetViewPanoramaAsync(this);
}
//this method is needed for using a ViewPager swiping feature
public static StreetDisplay newInstance(){
StreetDisplay sd = new StreetDisplay();
return sd;
}
#Override
public void onStreetViewPanoramaReady(StreetViewPanorama panorama) {
panorama.setPosition(PosOne);
}
}
Here's the error message I get when I run my app
Process: com.example.nikhilbhaskar.mapplayground, PID: 22406
java.lang.NullPointerException
at com.example.nikhilbhaskar.mapplayground.StreetDisplay.initialize(StreetDisplay.java:43)
at com.example.nikhilbhaskar.mapplayground.StreetDisplay.onCreateView(StreetDisplay.java:33)
Line 33 is
initialize();
Line 43 is
streetFrag.getStreetViewPanoramaAsync(this);
I am not sure what the problem is - Can you help?

streetFrag =
(SupportStreetViewPanoramaFragment) getFragmentManager()
.findFragmentById(R.id.street);
It is possible that this statement is not creating the object for StreetFrag.
Check whether is streetFrag is null or not.

I tried the doc from official, and it worked perfectly.
My sample code:
StreetViewActivity
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import com.google.android.gms.maps.OnStreetViewPanoramaReadyCallback;
import com.google.android.gms.maps.StreetViewPanorama;
import com.google.android.gms.maps.StreetViewPanoramaFragment;
import com.google.android.gms.maps.model.LatLng;
public class StreetViewActivity extends FragmentActivity
implements OnStreetViewPanoramaReadyCallback {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_street_view);
StreetViewPanoramaFragment streetViewPanoramaFragment =
(StreetViewPanoramaFragment) getFragmentManager()
.findFragmentById(R.id.streetviewpanorama);
streetViewPanoramaFragment.getStreetViewPanoramaAsync(this);
}
#Override
public void onStreetViewPanoramaReady(StreetViewPanorama streetViewPanorama) {
streetViewPanorama.setPosition(new LatLng(-33.87365, 151.20689));
}
}
And for the activity_street_view.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:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context="com.bjiang.map_ex.StreetViewActivity">
<fragment
android:name="com.google.android.gms.maps.StreetViewPanoramaFragment"
android:id="#+id/streetviewpanorama"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
For more details, please refer here.
EDIT:
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import com.google.android.gms.maps.OnStreetViewPanoramaReadyCallback;
import com.google.android.gms.maps.StreetViewPanorama;
import com.google.android.gms.maps.SupportStreetViewPanoramaFragment;
import com.google.android.gms.maps.model.LatLng;
public class StreetDisplay extends FragmentActivity implements OnStreetViewPanoramaReadyCallback {
static SupportStreetViewPanoramaFragment streetViewPanoramaFragment;
static final LatLng PosOne = new LatLng(43.771925, -79.512460);
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.street_display);
streetViewPanoramaFragment =
((SupportStreetViewPanoramaFragment)getSupportFragmentManager().findFragmentById(R.id.street));
streetViewPanoramaFragment.getStreetViewPanoramaAsync(this);
}
//this method is needed for using a ViewPager swiping feature
public static Fragment newInstance(){
return streetViewPanoramaFragment.newInstance();
}
#Override
public void onStreetViewPanoramaReady(StreetViewPanorama streetViewPanorama) {
streetViewPanorama.setPosition(new LatLng(-33.87365, 151.20689));
}
}

Within fragment use getChildFragmentManager() instead.
streetFrag = (SupportStreetViewPanoramaFragment) getChildFragmentManager()
.findFragmentById(R.id.street);

Android android.R.id.list ListView Fragment Exception

I have an android application that keeps crashing when I add a ListFragment. I keep getting and error and have read other sites with the same error message. I haven't found anything that's worked for me yet though. The exception is:
Unable to start Activity Component {com.alarm/com.alarm.activity.AlarmListActivity} java.lang.RuntimeException: Content has view with android.R.id.list that is not a ListView class.
This is strange though because I don't have a ListView with an id of 'list'. Here is how my fragment was defined.
<?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" >
<ListView
android:id="#+id/alarm_list"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
Here my fragment and activity classes.
Fragment:
package com.alarm.fragments;
import android.app.ListFragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.alarm.R;
public class AlarmListFragment extends ListFragment {
#Override
public void onActivityCreated(Bundle savedInstanceState) {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.frag_alarm_list, null);
return v;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public void onResume() {
super.onResume();
Log.e("onREUME", "resuming list activity");
}
}
Activity:
package com.alarm.activity;
import android.app.Activity;
import android.app.FragmentManager;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import com.alarm.R;
import com.alarm.fragments.AlarmListFragment;
public class AlarmListActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FragmentManager fm = getFragmentManager();
if (fm.findFragmentById(android.R.id.content) == null) {
fm.beginTransaction().add(android.R.id.content, new AlarmListFragment()).commit();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.alarm_list_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_add_alarm:
Intent addAlarm = new Intent(this, AlarmCreateActivity.class);
startActivity(addAlarm);
return true;
case R.id.settings:
Intent settings = new Intent(this, SettingsActivity.class);
startActivity(settings);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
Any help or explanation of why this might be happening would be greatly appreciated!

You must use android:id="#id/android:list" for your ListView

Using Google Analytics To Track Fragments

Just need to know the proper way to implement Google analytics to track when a user is on a fragment in real time this is what is do now
#Override
public void onResume() {
super.onResume();
Tracker myTracker = parentActivity.getTracker();
myTracker.setCustomMetric(1, (long) 1);
myTracker.sendView("Music View");
}
the getTracker class is in my main activity and just returns the instance of tracker in the main activity
Any help would be much appreciated!

Mochini's answer uses Google Analytics V2. Bellow you can see how to do it on V4 and V3:
V4:
Application:
public class YourApplication extends Application
{
public synchronized Tracker getTracker() {
try {
final GoogleAnalytics googleAnalytics = GoogleAnalytics.getInstance(this);
return googleAnalytics.newTracker(R.xml.analytics);
}catch(final Exception e){
Log.e(TAG, "Failed to initialize Google Analytics V4");
}
return null;
}
}
res/xml/analytics.xml (you can name it anything, it does not need to be called "analytics")
<?xml version="1.0" encoding="utf-8" ?>
<resources xmlns:tools="http://schemas.android.com/tools" tools:ignore="TypographyDashes">
<!--Replace placeholder ID with your tracking ID-->
<string name="ga_trackingId">UA-XXXXXXXX-X</string>
<!--Enable automatic activity tracking-->
<bool name="ga_autoActivityTracking">true</bool>
<!--Disable automatic exception tracking-->
<bool name="ga_reportUncaughtExceptions">false</bool>
</resources>
build.gradle:
compile 'com.google.android.gms:play-services:7.3.0'
Fragment superclass:
public abstract class TrackedFragment extends Fragment{
#Override
public void onResume() {
super.onResume();
final Tracker tracker = yourApplicationInstance.getTracker();
if(tracker != null){
tracker.setScreenName(getClass().getSimpleName());
tracker.send(new HitBuilders.ScreenViewBuilder().build());
}
}
}
V3
import android.os.Bundle;
import android.support.v4.app.Fragment;
import com.google.analytics.tracking.android.EasyTracker;
import com.google.analytics.tracking.android.Fields;
import com.google.analytics.tracking.android.MapBuilder;
import com.google.analytics.tracking.android.Tracker;
public abstract class TrackedFragment extends Fragment{
private Tracker tracker;
#Override
public void onActivityCreated(final Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
this.tracker = EasyTracker.getInstance(getActivity());
}
#Override
public void onResume() {
super.onResume();
this.tracker.set(Fields.SCREEN_NAME, getClass().getSimpleName());
this.tracker.send( MapBuilder.createAppView().build() );
}
}
Source: https://developers.google.com/analytics/devguides/collection/android/v3/migration

This an example using FragmentActivity and fragments:
Create XML file in value folder (values/analytics.xml):
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- Replace placeholder ID with your tracking ID -->
<string name="ga_trackingId">XX-xxxxxxxx-x</string>
<!-- Enable Activity tracking -->
<bool name="ga_autoActivityTracking">true</bool>
<!-- Enable debug -->
<bool name="ga_debug">true</bool>
<!-- The screen names that will appear in your reporting -->
<string name="com.example.myapp.FragmentActivity">Fragment activity</string>
<!--
The inverval of time after all the collected data
should be sent to the server, in seconds.
-->
<integer name="ga_dispatchPeriod">20</integer>
</resources>
In your FragmentActivity class, add this:
#Override
protected void onStart() {
super.onStart();
EasyTracker.getInstance().setContext(this.getBaseContext());
EasyTracker.getInstance().activityStart(this); // Add this method
}
#Override
protected void onStop() {
super.onStop();
EasyTracker.getInstance().activityStop(this); // Add this method
}
Create new class in your package: TrackedFragment.java
public class TrackedFragment extends Fragment {
private Tracker tracker;
private String activityId;
private String fragmentId;
#Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
EasyTracker.getInstance().setContext(getActivity().getApplicationContext());
this.tracker = EasyTracker.getTracker();
this.fragmentId = getClass().getSimpleName();
this.activityId = getActivity().getClass().getSimpleName();
}
#Override
public void onResume() {
super.onResume();
this.tracker.sendView("/" + this.activityId + "/" + this.fragmentId);
}
}
Finally, your fragment should extend from TrackedFragment like:
public class NewFragment extends TrackedFragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.newfragment, null);
}
}

Tracking methods section suggests that you just need to call EasyTracker.getInstance().setContext(getActivity()); first, then you can use the tracker in "other classes".
manual screen tracking section suggests that you can track a Fragment view with myTracker.sendView("Home Screen");

Another approach for V3 (since onResume() is tied to the Activity and not the Fragment. This works well when the parent/child relationships are well-known.
Parent Fragment sends initial event onStart():
public class ParentFragment extends Fragment {
private Tracker mTracker;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mTracker = EasyTracker.getInstance(getActivity());
}
#Override
public void onStart() {
super.onStart();
mTracker.set(Fields.SCREEN_NAME, "Parent Fragment");
mTracker.send(MapBuilder.createAppView().build());
}
}
Child Fragment overrides both onStart() and onStop() :
public class ChildFragment extends Fragment {
private Tracker mTracker;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mTracker = EasyTracker.getInstance(getActivity());
}
#Override
public void onStart() {
super.onStart();
mTracker.set(Fields.SCREEN_NAME, "Child Fragment");
mTracker.send(MapBuilder.createAppView().build());
}
#Override
public void onStop() {
super.onStop();
mTracker.set(Fields.SCREEN_NAME, "Parent Fragment");
mTracker.send(MapBuilder.createAppView().build());
}
}

Tiago's version can't be used in the new goole analytics v4. Instead, use this code from Google's docs
package com.google.android.apps.mobileplayground;
import com.google.android.apps.mobileplayground.AnalyticsSampleApp.TrackerName;
import com.google.android.gms.analytics.GoogleAnalytics;
import com.google.android.gms.analytics.HitBuilders;
import com.google.android.gms.analytics.Tracker;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
/**
* Class to exercise Event hits.
*/
public class EventFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View view = inflater.inflate(R.layout.event, container, false);
setupEvent(view, R.id.video1Play, R.string.videoCategory, R.string.videoPlay, R.string.video1);
setupEvent(view, R.id.video1Pause, R.string.videoCategory, R.string.videoPause,
R.string.video1);
setupEvent(view, R.id.video2Play, R.string.videoCategory, R.string.videoPlay, R.string.video2);
setupEvent(view, R.id.video2Pause, R.string.videoCategory, R.string.videoPause,
R.string.video2);
setupEvent(view, R.id.book1View, R.string.bookCategory, R.string.bookView, R.string.book1);
setupEvent(view, R.id.book1Share, R.string.bookCategory, R.string.bookShare, R.string.book1);
final Button dispatchButton = (Button) view.findViewById(R.id.eventDispatch);
dispatchButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// Manually start a dispatch (Unnecessary if the tracker has a dispatch interval)
GoogleAnalytics.getInstance(getActivity().getApplicationContext()).dispatchLocalHits();
}
});
return view;
}
private void setupEvent(View v, int buttonId, final int categoryId, final int actionId,
final int labelId) {
final Button pageviewButton = (Button) v.findViewById(buttonId);
pageviewButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// Get tracker.
Tracker t = ((AnalyticsSampleApp) getActivity().getApplication()).getTracker(
TrackerName.APP_TRACKER);
// Build and send an Event.
t.send(new HitBuilders.EventBuilder()
.setCategory(getString(categoryId))
.setAction(getString(actionId))
.setLabel(getString(labelId))
.build());
}
});
}
}

with android google analytics v4
i tried this and it worked
refering this https://developers.google.com/analytics/devguides/collection/android/v4/events
import java.net.URLEncoder;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Xml.Encoding;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.widget.ScrollView;
import android.widget.TextView;
import com.Blog.gkgyan.AnalyticsSampleApp.TrackerName;
import com.Blog.gkgyan.parser.RSSFeed;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.analytics.GoogleAnalytics;
import com.google.android.gms.analytics.HitBuilders;
import com.google.android.gms.analytics.Tracker;
public class DetailFragment extends Fragment {
private int fPos;
RSSFeed fFeed;
String country;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
fFeed = (RSSFeed)getArguments().getSerializable("feed");
fPos = getArguments().getInt("pos");
Tracker t = ((AnalyticsSampleApp) getActivity().getApplication()).getTracker(
TrackerName.APP_TRACKER);
// Build and send an Event.
t.send(new HitBuilders.EventBuilder()
.setCategory(fFeed.getItem(fPos).getTitle())
.setAction("viewpager click")
.setLabel("viewpager label")
.build());
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.detail_fragment, container, false);
// Initializr views
TextView title = (TextView)view.findViewById(R.id.title);
WebView desc = (WebView)view.findViewById(R.id.desc);
// Enable the vertical fading edge (by default it is disabled)
ScrollView sv = (ScrollView)view.findViewById(R.id.sv);
sv.setVerticalFadingEdgeEnabled(true);
// Set the views
desc.getSettings().setJavaScriptEnabled(true);
title.setText(fFeed.getItem(fPos).getTitle());
country = "<html xmlns=\"http://www.w3.org/1999/xhtml\"><head><meta http-equiv=\"Content-Type\" content=\"text/html; charset=iso-8859-1\"><style type=\"text/css\">p{text-align:justify;font-size:125%;}</style></head><body>" + "<p>" + fFeed.getItem(fPos).getDescription()+"</p>"+"</body></html>";
//desc.loadData( country, "text/html", "UTF-8");
//desc.loadData( country, "text/html; charset=utf-8", "utf-8");
desc.loadData( URLEncoder.encode(country).replaceAll("\\+", " "), "text/html", Encoding.UTF_8.toString());
return view;
}
}

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/.