android oncreateview throwing inflateException using viewpager

android oncreateview throwing inflateException using viewpager - android

I'm trying to put a google maps fragment in another fragment, and that fragment is part of a viewpager. The initial part of it works, the map fragment gets put on my phone's screen.
The activity uses a viewpager that has 3 fragments, the fragment with the map fragment in it is the first one you see, but when i swipe to the last fragment and then go back to the middle fragment, the app crashes and i get an inflateException in the OnCreateView method of my first fragment (the one with the map).
I have no idea how to fix this, and nothing i tried makes it work. Any help with this would be greatly appreciated.
The fragment with the mapfragment in it.
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/tV_welkomtekst"
android:textSize="25dp"
android:layout_gravity="center"/>
<TextView
android:text="#string/sportdropdown_tekst"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="25dp"/>
<Spinner
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/spinSporten"></Spinner>
<fragment
android:layout_width="match_parent"
android:layout_height="300sp"
android:id="#+id/map"
android:name="com.google.android.gms.maps.MapFragment"
/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/tekst_startWorkout"/>
The activity that holds the fragments.
package desomer_michael_2app.desomer_michael_eindopdracht_app;
import android.content.Intent;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBarActivity;
import android.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
public class SportActivity extends FragmentActivity implements SportStatsFragment.OnSportStatsFragmentInteractionListener, SportStartFragment.OnSportStartFragmentInteractionListener, SportBadgesFragment.OnSportBadgesFragmentInteractionListener{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sport);
ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
viewPager.setAdapter(new ViewPagerAdapter(getSupportFragmentManager()));
/*
if (savedInstanceState == null) {
getFragmentManager().beginTransaction()
.add(R.id.container, new SportStartFragment())
.commit();
}
*/
}
protected void onSaveInstanceState(Bundle outState){
super.onSaveInstanceState(outState);
//getSupportFragmentManager().putFragment(outState, "sportStartFragment", );
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_sport, menu);
return true;
}
public void uitloggen(){
//Intent i = new Intent("android.intent.action.MAIN");
//startActivity(i);
finish();
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
switch(id){
case R.id.log_out:
uitloggen();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
The viewpager
package desomer_michael_2app.desomer_michael_eindopdracht_app;
import android.support.v4.app.FragmentManager;
import android.content.Context;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
/**
* Created by Michaël Desomer on 25/04/2015.
*/
public class ViewPagerAdapter extends FragmentPagerAdapter{
final int PAGE_COUNT = 3;
private String tabtitles[] = new String[]{"Start","Stats","Badges"};
Context context;
public ViewPagerAdapter(FragmentManager fm){
super(fm);
}
#Override
public Fragment getItem(int i) {
switch(i){
case 0:
SportStartFragment sportStartFragment = new SportStartFragment();
return sportStartFragment;
case 1:
SportStatsFragment sportStatsFragment = new SportStatsFragment();
return sportStatsFragment;
case 2:
SportBadgesFragment sportBadgesFragment = new SportBadgesFragment();
return sportBadgesFragment;
default:
return null;
}
//return null;
}
#Override
public CharSequence getPageTitle(int position){
return tabtitles[position];
}
#Override
public int getCount() {
return PAGE_COUNT;
}
}
My android manifest
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".LoginRegistreerActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SportActivity"
android:label="#string/title_activity_sport" >
<intent-filter>
<action android:name="create_sportactivity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value=""/>
</application>
The error message
05-02 15:57:01.360 19662-19662/desomer_michael_2app.desomer_michael_eindopdracht_app E/AndroidRuntime﹕ FATAL EXCEPTION: main
android.view.InflateException: Binary XML file line #30: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:719)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at desomer_michael_2app.desomer_michael_eindopdracht_app.SportStartFragment.onCreateView(SportStartFragment.java:57)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1786)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:947)
at android.support.v4.app.FragmentManagerImpl.attachFragment(FragmentManager.java:1302)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:729)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1489)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:486)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1073)
at android.support.v4.view.ViewPager.populate(ViewPager.java:919)
at android.support.v4.view.ViewPager$3.run(ViewPager.java:249)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:791)
at android.view.Choreographer.doCallbacks(Choreographer.java:591)
at android.view.Choreographer.doFrame(Choreographer.java:560)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:777)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5419)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: Binary XML file line #30: Duplicate id 0x7f09006d, tag null, or parent id 0xffffffff with another fragment for com.google.android.gms.maps.MapFragment
at desomer_michael_2app.desomer_michael_eindopdracht_app.SportStartFragment.onCreateView(SportStartFragment.java:57)
(there were quite bit more, but i couldn't get them all in the code format)
The SportStatsFragment
package desomer_michael_2app.desomer_michael_eindopdracht_app;
import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* A simple {#link Fragment} subclass.
* Activities that contain this fragment must implement the
* {#link SportStatsFragment.OnSportStatsFragmentInteractionListener} interface
* to handle interaction events.
*/
public class SportStatsFragment extends Fragment {
private OnSportStatsFragmentInteractionListener mListener;
public SportStatsFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_sport_stats, container, false);
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mListener = (OnSportStatsFragmentInteractionListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnFragmentInteractionListener");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
/**
* This interface must be implemented by activities that contain this
* fragment to allow an interaction in this fragment to be communicated
* to the activity and potentially other fragments contained in that
* activity.
* <p/>
* See the Android Training lesson <a href=
* "http://developer.android.com/training/basics/fragments/communicating.html"
* >Communicating with Other Fragments</a> for more information.
*/
public interface OnSportStatsFragmentInteractionListener {
// TODO: Update argument type and name
}
}

The problem is that you are using the same map again and again (Duplicate id 0x7f09006d) without destroying.
The case is destroy fragment
#Override
public void onDestroyView()
{
super.onDestroyView();
Fragment fragment = (getFragmentManager().findFragmentById(R.id.map));
FragmentTransaction ft= getActivity().getSupportFragmentManager().beginTransaction();
ft.remove(fragment);
ft.commit();
}

package com.panorma.views.fragments.contact;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.util.Log;
import android.view.InflateException;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapsInitializer;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLndg;
import com.google.android.gms.maps.model.MarkerOptions;
import com.panorma.R;
/**
* Created by aateek on 3/10/2016.
*/
// In this case, the fragment displays simple text based on the page
public class MapViewPagerFragment extends Fragment {
private static View rootView;
private final double LATITUDE = *********;
private final double LONGITUDE = ********;
GoogleMap googleMap;
private SupportMapFragment mapFrag;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (rootView != null) {
ViewGroup parent = (ViewGroup) rootView.getParent();
if (parent != null)
parent.removeView(rootView);
}
try {
rootView = inflater.inflate(R.layout.fragment_contacts, container, false);
} catch (InflateException e) {
/* map is already there, just return view as it is */
Log.d("InflateException", "onCreateView: ");
}
initMap();
return rootView;
}
private void initMap() {
LatLng location = new LatLng(LATITUDE, LONGITUDE);
FragmentManager fm = getChildFragmentManager();
mapFrag = (SupportMapFragment) fm.findFragmentById(
R.id.map);
if (mapFrag != null) {
googleMap = mapFrag.getMap();
}
if (googleMap != null) {
googleMap.getUiSettings().setMyLocationButtonEnabled(false);
googleMap.addMarker(new MarkerOptions().position(location));
MapsInitializer.initialize(this.getActivity());
// Updates the location and zoom of the MapView
CameraUpdate initalUpdate = CameraUpdateFactory.newLatLngZoom(
location, 17.0f);
googleMap.animateCamera(initalUpdate);
}
}
}

Related

Action Bar not Displaying

I'm trying to put an up button on my action bar, but my app isn't displaying the action bar for the fragment. My main activity's fragment has an action bar, just not the fragment it launches, so when I call getActivity().getActionBar().setDisplayHomeAsUpEnabled(true), the app throws a nullPointerException. (Stack trace for this below at NPE Stack Trace 1).
I've tried using getActionBar.show() and setting the theme to Theme.Holo.Light, as suggested here. getActionBar.show(), but that crashes the app with a nullPointerException. When I try to use Theme.Holo.Light, it tells me I have to use an appcompat theme ("You need to use a Theme.AppCompat theme (or descendant) with this activity.")
I've looked around for how to fix that error, but none of the AppCompat themes people suggest solve the problem of there being no action bar on this fragment. Any suggestions people have are appreciated. Code below.
The fragment that won't display an action bar:
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import java.util.Date;
import java.util.UUID;
public class CrimeFragment extends Fragment {
public static final String EXTRA_CRIME_ID = "com.bignerdranch.android.criminalintent,crime_id";
private static final String DIALOG_DATE = "date";
private static final int REQUEST_DATE = 0;
private Crime mCrime;
private EditText mTitleField;
private Button mDateButton;
private CheckBox mSolvedCheckBox;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
UUID crimeId = (UUID)getArguments().getSerializable(EXTRA_CRIME_ID);
mCrime = CrimeLab.get(getActivity()).getCrime(crimeId);
}
#TargetApi(11)
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_crime, parent, false);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
if (NavUtils.getParentActivityName(getActivity()) != null) {
//getActivity().getActionBar().setDisplayHomeAsUpEnabled(true);
}
}
mTitleField = (EditText)v.findViewById(R.id.crime_title);
mTitleField.setText(mCrime.getTitle());
mTitleField.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
//This space intentionally left blank
}
#Override
public void onTextChanged(CharSequence c, int start, int before, int count) {
mCrime.setTitle(c.toString());
}
#Override
public void afterTextChanged(Editable s) {
//This space intentionally left blank
}
});
mDateButton = (Button)v.findViewById(R.id.crime_date);
updateDate();
mDateButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
FragmentManager fm = getActivity().getFragmentManager();
DatePickerFragment dialog = DatePickerFragment.newInstance(mCrime.getDate());
dialog.setTargetFragment(CrimeFragment.this, REQUEST_DATE);
dialog.show(fm, DIALOG_DATE);
}
});
mSolvedCheckBox = (CheckBox)v.findViewById(R.id.crime_solved);
mSolvedCheckBox.setChecked(mCrime.isSolved());
mSolvedCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
mCrime.setSolved(isChecked);
}
});
return v;
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode != Activity.RESULT_OK) return;
if (requestCode == REQUEST_DATE) {
Date date = (Date)data.getSerializableExtra(DatePickerFragment.EXTRA_DATE);
mCrime.setDate(date);
updateDate();
}
}
public static CrimeFragment newInstance(UUID crimeId) {
Bundle args = new Bundle();
args.putSerializable(EXTRA_CRIME_ID, crimeId);
CrimeFragment fragment = new CrimeFragment();
fragment.setArguments(args);
return fragment;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()) {
case R.id.home:
if (NavUtils.getParentActivityName(getActivity()) != null) {
NavUtils.navigateUpFromSameTask(getActivity());
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void updateDate() {
mDateButton.setText(mCrime.getDate().toString());
}
}
Fragment XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/crime_title_label"
style="?android:listSeparatorTextViewStyle"
/>
<EditText
android:id="#+id/crime_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="#string/crime_title_hint"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/crime_details_label"
style="?android:listSeparatorTextViewStyle"
/>
<Button
android:id="#+id/crime_date"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
/>
<CheckBox
android:id="#+id/crime_solved"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:text="#string/crime_solved_label"
/>
Activity hosting fragment:
import android.app.Fragment;
import android.app.FragmentManager;
import android.os.Bundle;
import android.support.v13.app.FragmentStatePagerAdapter;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import java.util.ArrayList;
import java.util.UUID;
public class CrimePagerActivity extends FragmentActivity {
private ViewPager mViewPager;
private ArrayList<Crime> mCrimes;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mViewPager = new ViewPager(this);
mViewPager.setId(R.id.viewpager);
setContentView(mViewPager);
mCrimes = CrimeLab.get(this).getCrimes();
FragmentManager fm = getFragmentManager();
mViewPager.setAdapter(new FragmentStatePagerAdapter(fm) {
#Override
public int getCount() {
return mCrimes.size();
}
#Override
public Fragment getItem(int pos) {
Crime crime = mCrimes.get(pos);
return CrimeFragment.newInstance(crime.getId());
}
});
UUID crimeId = (UUID)getIntent().getSerializableExtra(CrimeFragment.EXTRA_CRIME_ID);
for (int i = 0; i < mCrimes.size(); i++) {
if (mCrimes.get(i).getId().equals(crimeId)) {
mViewPager.setCurrentItem(i);
break;
}
}
mViewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
public void onPageScrollStateChanged(int state) {}
public void onPageScrolled(int pos, float posOffset, int posOffsetPixels) {}
public void onPageSelected(int pos) {
Crime crime = mCrimes.get(pos);
if (crime.getTitle() != null) {
setTitle(crime.getTitle());
}
}
});
}
}
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.bignerdranch.android.criminalintent" >
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".CrimeListActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".CrimePagerActivity"
android:label="#string/app_name" >
<meta-data android:name="android.support.PARENT_ACTIVITY"
android:value=".CrimeListActivity"/>
</activity>
</application>
res/styles:
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
</style>
NPE Stack Trace 1:
Process: com.bignerdranch.android.criminalintent, PID: 24448
java.lang.NullPointerException
at com.bignerdranch.android.criminalintent.CrimeFragment.onCreateView(CrimeFragment.java:57)
at android.app.Fragment.performCreateView(Fragment.java:1700)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:890)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062)
at android.app.BackStackRecord.run(BackStackRecord.java:684)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1453)
at android.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:479)
at android.support.v13.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:167)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1073)
at android.support.v4.view.ViewPager.populate(ViewPager.java:919)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1441)
at android.view.View.measure(View.java:17495)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5363)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:17495)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5363)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1410)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:17495)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5363)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2548)
at android.view.View.measure(View.java:17495)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2285)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1396)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1595)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1254)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6632)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:814)
at android.view.Choreographer.doCallbacks(Choreographer.java:614)
at android.view.Choreographer.doFrame(Choreographer.java:584)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:800)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5487)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)

CrimePagerActivity probably wants to extend ActionBarActivity rather than FragmentActivity.

when I call
getActivity().getActionBar().setDisplayHomeAsUpEnabled(true), the app
throws a nullPointerException.
When you are calling this function and saying yourself that you have ActionBar in your Fragment and not in your Activity then how can you run this command.
I've tried using getActionBar.show() and setting the theme to Theme.Holo.Light, as suggested here. getActionBar.show()
That example is outdated and there's no more Holo Theme or ActionBar. There's Toolbar now.

What is ActionBar.setHomeButtonEnabled(boolean)

I want to create a viewpager which contains 2 tabs, I have 3 layout:
This is activity_chart.xml that contains paper:
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v4.view.ViewPager>
This is AccountsActivityChart.java:
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import com.rastari.salar.mymetarialbank.R;
import com.rastari.salar.mymetarialbank.adapter.TabsPagerAdapter;
/**
* Created by Salar on 9/5/2015.
*/
public class AccountsActivityChart extends FragmentActivity implements ActionBar.TabListener {
private ViewPager viewPager;
private TabsPagerAdapter mAdapter;
private ActionBar actionBar;
// Tab titles
private String[] tabs = { "Accounts Activity", "Chart Activity" };
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chart);
// Initilization
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Adding Tabs
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name)
.setTabListener(this));
}
/**
* on swiping the viewpager make respective tab selected
* */
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
// on changing the page
// make respected tab selected
actionBar.setSelectedNavigationItem(position);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
// on tab selected
// show respected fragment view
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {
}
}
this is TabsPagerAdapter.java class:
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
/**
* Created by Salar on 26/4/2015.
*/
public class TabsPagerAdapter extends FragmentPagerAdapter {
public TabsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int index) {
switch (index) {
case 0:
// Accounts Activity fragment activity
return new AccountsActivityFragment();
case 1:
// Chart Activity activity
return new ChartActivityFragment();
}
return null;
}
#Override
public int getCount() {
// get item count - equal to number of tabs
return 2;
}
}
this is AccountsActivityFragment.java:
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.rastari.salar.mymetarialbank.R;
/**
* Created by Salar on 25/4/2015.
*/
public class AccountsActivityFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_accounts_activity, container, false);
return rootView;
}
}
this is ChartActivityFragment.java:
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.rastari.salar.mymetarialbank.R;
/**
* Created by Salar on 9/5/2015.
*/
public class ChartActivityFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_chart_activity, container, false);
return rootView;
}
}
this is manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.rastari.salar.mymetarialbank" >
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/MyMetarialBank">
<activity
android:name=".activity.Login"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".activity.MainActivity"/>
<activity android:name=".activity.AccountsActivityChart"/>
</application>
</manifest>
When I run the app I get this Error:
Attempt to invoke virtual method 'void
android.app.ActionBar.setHomeButtonEnabled(boolean)' on a null object
reference
How can I fix this?

I think you have applied the theme which is having no action bar. This is why when you are getting the actionbar instance, it will be null and you are calling the setHomeButtonEnabled on on the null actionbar instance. That is why you are getting the error.

try actionBar = getSupportActionBar();
instead of actionBar = getActionBar();

Google play services out of date or what?

I am working with google maps and when I'm running my app, it says I need to update my google play services.
Here is my code:
MainActivity.java:
import java.util.Locale;
import android.app.Activity;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.support.v13.app.FragmentPagerAdapter;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
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 MainActivity extends Activity implements ActionBar.TabListener {
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {#link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {#link android.support.v13.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Set up the action bar.
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// When swiping between different sections, select the corresponding
// tab. We can also use ActionBar.Tab#select() to do this if we have
// a reference to the Tab.
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by
// the adapter. Also specify this Activity object, which implements
// the TabListener interface, as the callback (listener) for when
// this tab is selected.
actionBar.addTab(actionBar.newTab().setText(mSectionsPagerAdapter.getPageTitle(i)).setTabListener(this));
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in
// the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
switch (i) {
case 0:
return new Tab1();
case 1:
return new TabTwoFragment();
default:
return new TabThreeFragment();
}
}
#Override
public int getCount() {
// Show 2 total pages.
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_map).toUpperCase(l);
case 1:
return getString(R.string.title_pinned).toUpperCase(l);
}
return null;
}
}
/**
* The first tab fragment
*/
/**
* The second tab fragment
*/
public static class TabTwoFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
TextView view = (TextView)rootView.findViewById(R.id.section_label);
view.setText("Tab 2 fragment");
return rootView;
}
}
public static class TabThreeFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
TextView view = (TextView)rootView.findViewById(R.id.section_label);
view.setText("Tab 3 fragment");
return rootView;
}
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
}
}
Tab1.java:
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Tab1 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.map, container, false);
return rootView;
}
}
map.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:id="#+id/mapLayout"
android:tag="mapLayoutTag" >
<fragment android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.google.android.gms.maps.MapFragment"
android:tag="gMaps"/>
</RelativeLayout>
Manifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="projectandroid.geomessenger"
android:versionCode="0"
android:versionName="0.1.0" >
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<!-- The following two permissions are not required to use
Google Maps Android API v2, but are recommended. -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="MyKey"/>
</application>
</manifest>
Am I missing anything? I don't know how to solve the problem. My google play services seems up to date.

Google Play Services on your device (or emulator) may be up to date, but the Google Play Services library you used in your app could be later version. This can happen sometimes when device (or emulator) did not get google play services update yet. I have seen this issue happen with emulators before (even genymotion).
It is strongly recommended you ensure this as part of your initialization.
To fix your problem, you can package your app with google play services client library that is same or less version than the one on the device. To find the Google Play services version on your device (or emulator) look in Settings -> Apps -> Downloaded -> Google Play Services. If this version is less than the library version you use in android app, i would try with matching version library.

Google Map APIv2 implementation , Binary XML file line #6: Error inflating class fragment

android.view.InflateException: Binary XML file line #6: Error inflating class fragment
I am trying to implement Google Map apiv2 in fragments following various tutorials , I ran into error inflating class fragment , then I came across various similar problems at stackoverflow , tried almost everything but the problem persist. I am new to android , any type of hints are welcome, i want to learn android development quick but I am stuck . thanks in advance.
edit: application closes unexpectedly when I go from fragment 3 to fragment 2 and fragment 1 is loaded in the background . Any ideas to solve such issues?
My android manifest :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.hspot2"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="18" />
<permission
android:name="com.example.hspot2.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- Required OpenGL ES 2.0. for Maps V2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.hspot2.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyDOeSK3RC57lSdERhR0tnadCSA"/>
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version"
/>
</application>
</manifest>
My main activity where I am implementing swipe tabs using fragments :
import java.util.Locale;
import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.app.NavUtils;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class MainActivity extends FragmentActivity implements
ActionBar.TabListener {
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
ActionBar actionBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mViewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager.setAdapter(mSectionsPagerAdapter);
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
actionBar.addTab(actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
// When swiping between different sections, select the corresponding
// tab. We can also use ActionBar.Tab#select() to do this if we have
// a reference to the Tab.
mViewPager
.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public void onTabSelected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in
// the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabReselected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentStatePagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
Fragment fragment = null;
if(i==0){
fragment = new FragmentA();
}
if(i==1){
fragment = new FragmentB();
}
if(i==2){
fragment = new FragmentC();
}
return fragment;
}
#Override
public int getCount() {
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
case 2:
return getString(R.string.title_section3).toUpperCase(l);
}
return null;
}
}
}
My fragment_a.xml where I am implementing map layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:background="#FFCC00" >
<fragment android:id="#+id/map1"
android:layout_width="match_parent"
android:layout_height="match_parent"
class = "com.google.android.gms.maps.SupportMapFragment"
/>
</RelativeLayout>
fragmentA.java file :
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.gms.common.GooglePlayServicesNotAvailableException;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.MapView;
import com.google.android.gms.maps.MapsInitializer;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
public class FragmentA extends Fragment{
static final LatLng HAMBURG = new LatLng(53.558, 9.927);
GoogleMap map;
MapView mapView;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_a, container, false);
map = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.map1)).getMap();
return v;
}
}

Try following solution, which works like a charm.
1) Go to XML file and write as below :
<fragment
android:id="#+id/citymap"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
class="com.google.android.gms.maps.SupportMapFragment"/>
2) Now go to your Activity and make changes as below :
=> Go to appropriate method and copy below code,
FragmentManager myFragmentManager = getChildFragmentManager();
SupportMapFragment mySupportMapFragment
=(SupportMapFragment)myFragmentManager.findFragmentById(R.id.citymap);
GoogleMap googlemap=mySupportMapFragment.getMap();

Why does the app crashes when I press a button that is linked with swipe views?

I want to press a button and go to a swipe view menu. I have a MainMenu.java class and XML main_menu.xml and I want to navigate with a button from MainMenu.java to ThirdMenu.java that is a SwipeView (tabs and swipe).
Here is the code for MainMenu.java :
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
public class MainMenu extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_menu);
addListenerOnButton();
}
ImageButton b1, b2, b3, b4, b5;
public void addListenerOnButton() {
final Context context = this;
b1 = (ImageButton) findViewById(R.id.imageButton1);
b1.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent intent = new Intent(context, ThirdMenu.class);
startActivity(intent);
}
});
}
}
Here is the ThirdMenu.java (it is Android generated code) :
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.NavUtils;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class ThirdMenu extends FragmentActivity {
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {#link android.support.v4.app.FragmentPagerAdapter} derivative, which
* will keep every loaded fragment in memory. If this becomes too memory
* intensive, it may be best to switch to a
* {#link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.third_menu);
// Show the Up button in the action bar.
getActionBar().setDisplayHomeAsUpEnabled(true);
// Create the adapter that will return a fragment for each of the three
// primary sections of the app.
mSectionsPagerAdapter = new SectionsPagerAdapter(
getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// This ID represents the Home or Up button. In the case of this
// activity, the Up button is shown. Use NavUtils to allow users
// to navigate up one level in the application structure. For
// more details, see the Navigation pattern on Android Design:
//
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a DummySectionFragment (defined as a static inner class
// below) with the page number as its lone argument.
Fragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
fragment.setArguments(args);
return fragment;
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase();
case 1:
return getString(R.string.title_section2).toUpperCase();
case 2:
return getString(R.string.title_section3).toUpperCase();
}
return null;
}
}
/**
* A dummy fragment representing a section of the app, but that simply
* displays dummy text.
*/
public static class DummySectionFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
public static final String ARG_SECTION_NUMBER = "section_number";
public DummySectionFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Create a new TextView and set its text to the fragment's section
// number argument value.
TextView textView = new TextView(getActivity());
textView.setGravity(Gravity.CENTER);
textView.setText(Integer.toString(getArguments().getInt(
ARG_SECTION_NUMBER)));
return textView;
}
}
}
I run the app on my tablet and when I press Button1 "b1" it crashes.
Here is the manifest.xml file :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="smart.weable"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#android:style/Theme.NoTitleBar.Fullscreen" >
<activity
android:name="smart.weable.WelcomeScreen"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="smart.weable.MainMenu"
android:label="#string/app_name" >
</activity>
<activity
android:name="smart.weable.SecondMenu"
android:label="#string/app_name" >
</activity>
<activity
android:name="smart.weable.ThirdMenu"
android:label="#string/title_activity_third_menu"
android:parentActivityName="smart.weable.MainMenu" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="smart.weable.MainMenu" />
</activity>
</application>
</manifest>
What modifications should I make in order to make a working app? Thank you!

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