Develop Reference

Google Map not showing on tab fragment in ViewPager - android

I am working in a new Android project.
The first activity is using a slider menu and fragments. On the first fragment there is a list view (PrimaryFragmentDormir.java). After selecting one of the rows, a new activity is launched. This last activity uses three tabs, to show different information about the selected row object. The listview is loaded from remote JSON files.
The first tab shows details about the selected object, the second tab should show a map.
I have followed the official documentation to setup all the needed to include Google Maps on my app, at least I think so.
When the user selects the second tab, a blank screen is shown with the Google logo at the left bottom side.
Here is the Android Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.solinpromex.elpasojuarezexperience" >
<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" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<uses-feature android:glEsVersion="0x00020000" android:required="true"/>
<uses-library android:name="com.google.android.maps"/>
<application
android:name=".app.AppController"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<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="..hidden here..." />
<activity
android:name=".Inicio"
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=".MainActivity"
android:label="#string/app_name" >
</activity>
<activity
android:name=".Detalle_Hotel"
android:label="#string/title_activity_detalle__hotel" >
</activity>
</application>
</manifest>
Here the main activity that hosts the tabs:
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
public class Detalle_Hotel extends AppCompatActivity {
// Declaring Your View and Variables
public String nombre_hotel_recibido, foto_hotel_recibido, descripcion_hotel_recibido,direccion_hotel_recibido,web_hotel,tel_hotel,tel_reservas,zona_hotel,facebook_hotel,twitter_hotel;
private int hotel_num_estrellas, id_hotel;
private double calificacion_hotel,latitud_hotel,longitud_hotel;
Toolbar toolbar;
ViewPager pager;
ViewPagerAdapter adapter;
SlidingTabLayout tabs;
CharSequence Titles[]={"Info","Mapa","Opinión"};
int Numboftabs =3;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detalle__hotel);
nombre_hotel_recibido = getIntent().getStringExtra("nombre_hotel");
direccion_hotel_recibido = getIntent().getStringExtra("direccion_hotel");
descripcion_hotel_recibido = getIntent().getStringExtra("descripcion_hotel");
foto_hotel_recibido = getIntent().getStringExtra("foto_hotel");
hotel_num_estrellas = getIntent().getIntExtra("num_estrellas",0);
setTitle(nombre_hotel_recibido);
// Creating The Toolbar and setting it as the Toolbar for the activity
toolbar = (Toolbar) findViewById(R.id.tool_bar);
setSupportActionBar(toolbar);
// Creating The ViewPagerAdapter and Passing Fragment Manager, Titles fot the Tabs and Number Of Tabs.
adapter = new ViewPagerAdapter(getSupportFragmentManager(),Titles,Numboftabs);
// Assigning ViewPager View and setting the adapter
pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
// Assiging the Sliding Tab Layout View
tabs = (SlidingTabLayout) findViewById(R.id.tabs);
tabs.setDistributeEvenly(true); // To make the Tabs Fixed set this true, This makes the tabs Space Evenly in Available width
// Setting Custom Color for the Scroll bar indicator of the Tab View
tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
#Override
public int getIndicatorColor(int position) {
return getResources().getColor(R.color.rojomodesto);
}
});
// Setting the ViewPager For the SlidingTabsLayout
tabs.setViewPager(pager);
}
}
Here the code for the second tab:
import android.os.Bundle;
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.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
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 Tab2 extends Fragment {
private GoogleMap map;
static final LatLng HAMBURG = new LatLng(53.558, 9.927);
static final LatLng KIEL = new LatLng(53.551, 9.993);
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.tab_2, container, false);
return v;
}
#Override
public void onActivityCreated(Bundle state) {
super.onActivityCreated(state);
map = ((MapFragment) getActivity().getFragmentManager().findFragmentById(R.id.map))
.getMap();
if (map!=null){
Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
.title("Hamburg"));
Marker kiel = map.addMarker(new MarkerOptions()
.position(KIEL)
.title("Kiel")
.snippet("Kiel is cool")
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.res)));
}
}
}
I have checked out the API key and it is OK.
Thank you for your support.

The problem is that when you call getActivity().getFragmentManager(), you're getting the Activity's Fragment Manager.
Since you're using a nested MapFragment inside of a Fragment, you need to use getChildFragmentManager(): For example:
GoogleMap mapFragment = ((MapFragment) getChildFragmentManager()
.findFragmentById(R.id.map)).getMap();
So, replace this:
map = ((MapFragment) getActivity().getFragmentManager().findFragmentById(R.id.map))
.getMap();
With this:
map = ((MapFragment) getChildFragmentManager().findFragmentById(R.id.map))
.getMap();
However, while that would work, you would be better off having your Fragment extend MapFragment or SupportMapFragment, that way you wouldn't need to have nested Fragments, and you would avoid the potential of running into this problem.
Solution using TabLayout from the support library:
As ActionBar Tabs are deprecated, this is now the best way to implement tabs with a ViewPager. Notice this is done without use of a nested SupportMapFragment, and instead has the map Fragment extent SupportMapFragment:
MainActivity imports:
import android.content.Context;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v4.app.FragmentManager;
import android.view.View;
import android.widget.TextView;
MainActivity class:
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Get the ViewPager and set it's PagerAdapter so that it can display items
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
PagerAdapter pagerAdapter =
new PagerAdapter(getSupportFragmentManager(), MainActivity.this);
viewPager.setAdapter(pagerAdapter);
// Give the TabLayout the ViewPager
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.setupWithViewPager(viewPager);
// Iterate over all tabs and set the custom view
for (int i = 0; i < tabLayout.getTabCount(); i++) {
TabLayout.Tab tab = tabLayout.getTabAt(i);
tab.setCustomView(pagerAdapter.getTabView(i));
}
}
#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_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
class PagerAdapter extends FragmentPagerAdapter {
String tabTitles[] = new String[] { "Tab One", "Tab Two", "Tab Three", };
Context context;
public PagerAdapter(FragmentManager fm, Context context) {
super(fm);
this.context = context;
}
#Override
public int getCount() {
return tabTitles.length;
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new BlankFragment();
case 1:
return new BlankFragment();
case 2:
return new MapFragment();
}
return null;
}
#Override
public CharSequence getPageTitle(int position) {
// Generate title based on item position
return tabTitles[position];
}
public View getTabView(int position) {
View tab = LayoutInflater.from(MainActivity.this).inflate(R.layout.custom_tab, null);
TextView tv = (TextView) tab.findViewById(R.id.custom_text);
tv.setText(tabTitles[position]);
return tab;
}
}
}
The MapFragment, notice that it directly extends SupportMapFragment instead of having a nested SupportMapFragment inside it:
import android.util.Log;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
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 MapFragment extends SupportMapFragment implements
OnMapReadyCallback {
private final LatLng HAMBURG = new LatLng(53.558, 9.927);
private final LatLng KIEL = new LatLng(53.551, 9.993);
private static final String ARG_SECTION_NUMBER = "section_number";
private GoogleMap mMap;
private Marker marker;
public MapFragment() {
}
#Override
public void onResume() {
super.onResume();
Log.d("MyMap", "onResume");
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
if (mMap == null) {
Log.d("MyMap", "setUpMapIfNeeded");
getMapAsync(this);
}
}
#Override
public void onMapReady(GoogleMap googleMap) {
Log.d("MyMap", "onMapReady");
mMap = googleMap;
setUpMap();
}
private void setUpMap() {
mMap.setMyLocationEnabled(true);
mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
mMap.getUiSettings().setMapToolbarEnabled(false);
mMap.setMyLocationEnabled(true);
mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
mMap.getUiSettings().setMapToolbarEnabled(false);
Marker hamburg = mMap.addMarker(new MarkerOptions().position(HAMBURG)
.title("Hamburg"));
Marker kiel = mMap.addMarker(new MarkerOptions()
.position(KIEL)
.title("Kiel")
.snippet("Kiel is cool")
.icon(BitmapDescriptorFactory
.fromResource(R.mipmap.ic_launcher)));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));
mMap.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
}
}
layout xml for the Activity:
<RelativeLayout
android:id="#+id/main_layout"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:background="?attr/colorPrimary"
android:elevation="6dp"
android:minHeight="?attr/actionBarSize"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"/>
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
app:tabMode="fixed"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/toolbar"
android:background="?attr/colorPrimary"
android:elevation="6dp"
app:tabTextColor="#d3d3d3"
app:tabSelectedTextColor="#ffffff"
app:tabIndicatorColor="#ff00ff"
android:minHeight="?attr/actionBarSize"
/>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_below="#id/tab_layout"/>
</RelativeLayout>
custom_tab.xml, which is the layout for each tab:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/custom_text"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="?attr/selectableItemBackground"
android:gravity="center"
android:textSize="16dip"
android:textColor="#ffffff"
android:singleLine="true"
/>
</LinearLayout>
Gradle:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.0.1'
compile 'com.android.support:design:23.0.1'
compile 'com.google.android.gms:play-services:7.0.0'
}
Result:

Related

I have a problem integrating google map in fragment in android. I know how to do it in activity but fragment reference on this site are very old and not working in 2018. I don't have any error.below is fragment file. Any help will be highly appreciated. I have added API key and proper manifest file.
package com.example.narmail.truck30mint.Api.Fragments;
import android.Manifest;
import android.content.Context;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.example.narmail.truck30mint.R;
import com.google.android.gms.maps.CameraUpdateFactory;
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.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import java.util.ArrayList;
public class ViewTrucksFragment extends Fragment {
TextView pageTitle;
MapView mMapView;
private GoogleMap googleMap;
public ViewTrucksFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_view_trucks, container, false);
pageTitle = rootView.findViewById(R.id.view_trucks_title);
String load_id = getArguments().getString("load_id");
String load_from = getArguments().getString("load_from");
String load_to = getArguments().getString("load_to");
if (load_id != null && load_from != null && load_to != null) {
pageTitle.setText("Matching Trucks for "+load_from+" to "+load_to);
}
mMapView= rootView.findViewById(R.id.view_trucks_map);
mMapView.onCreate(savedInstanceState);
mMapView.onResume();
try {
MapsInitializer.initialize(getActivity().getApplicationContext());
} catch (Exception e) {
e.printStackTrace();
}
mMapView.getMapAsync(new OnMapReadyCallback() {
#Override
public void onMapReady(GoogleMap mMap) {
googleMap = mMap;
googleMap.getUiSettings().setCompassEnabled(true);
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
googleMap.getUiSettings().setRotateGesturesEnabled(true);
// For dropping a marker at a point on the Map
LatLng sydney = new LatLng(30.374219,76.782055);
googleMap.addMarker(new MarkerOptions().position(sydney).
title("Title").snippet("TitleName"));
// For zooming automatically to the location of the marker
CameraPosition cameraPosition = new CameraPosition.Builder().target(sydney).zoom(12).build();
googleMap.animateCamera(CameraUpdateFactory.newCameraPosition
(cameraPosition ));
}
});
/*----------------*/
return rootView;
}
}
and below is my layout file
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorWhite"
tools:context=".Api.Fragments.ViewTrucksFragment">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/view_trucks_title"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:textAlignment="center"
android:layout_marginRight="10dp"
android:layout_marginLeft="10dp"
android:padding="10dp"
android:textColor="#color/colorPrimary"
android:textSize="15sp"
android:text="#string/hello_blank_fragment" />
<com.google.android.gms.maps.MapView
android:id="#+id/view_trucks_map"
android:layout_width="match_parent"
android:layout_height="match_parent">
</com.google.android.gms.maps.MapView>
</LinearLayout>
</FrameLayout>

Please follow below step to finish your task. Just need to create 3 files
(1) Create XML layout for map inside your fragment layout fragment_map.xml
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
(2) Create Fragment to load MAP MapFragment.Java
public class MapFragment extends Fragment implements OnMapReadyCallback {
private GoogleMap mMap;
public MapFragment() {
// 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_map, container, false);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
if(getActivity()!=null) {
SupportMapFragment mapFragment = (SupportMapFragment) getActivity().getSupportFragmentManager()
.findFragmentById(R.id.map);
if (mapFragment != null) {
mapFragment.getMapAsync(this);
}
}
}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
//Do your stuff here
}
}
(3) Create Activity to load MAP fragment MapsActivity.java
public class MapsActivity extends FragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.content,new MapFragment());
fragmentTransaction.commit();
}
}
For MAP key you need to follow same step you have done in your project. Hope this step will help you.
Inside Gradle please use below gradle
implementation 'com.google.android.gms:play-services-maps:15.0.1'
AndroidManifest.xml define below things.
<uses-permission android:name="android.permission.INTERNET"/>
Inside Application Tag.
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="YOUR MAP KEY" />

My code displays the following error:
setSupportActionBar(toolbar);
ERRO: Cannot Resolve method setSupportActionBar(android.support.v7.widget.Toolbar);
getSupportActionBar();
ERROR: Cannot resolve method'getSupportActionBar();
My codes are as follows:
MapsActivity.java
package com.thiagosaad.filadeatendimento;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v7.widget.Toolbar;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
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;
import com.thiagosaad.filadeatendimento.tab.TabViewPagerAdapter;
import com.thiagosaad.filadeatendimento.tab.fragments.InfoMapFragment;
import com.thiagosaad.filadeatendimento.tab.fragments.UserAccountFragment;
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
// GOOGLE MAPS API CONFIG
private GoogleMap mMap;
// TABLAYOUT CONFIG
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
// TAB LAYOUT CONFIG
toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
viewPager = findViewById(R.id.tabViewPager);
setupViewPager(viewPager);
tabLayout = findViewById(R.id.tabMenu);
tabLayout.setupWithViewPager(viewPager);
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// Add a marker in Sydney and move the camera
LatLng sydney = new LatLng(-34, 151);
mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
}
private void setupViewPager(ViewPager viewPager) {
TabViewPagerAdapter adapter = new TabViewPagerAdapter(getSupportFragmentManager());
adapter.addFrag(new UserAccountFragment(), "ONE");
adapter.addFrag(new InfoMapFragment(), "TWO");
viewPager.setAdapter(adapter);
}
}
activity_maps.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MapsActivity" >
<fragment 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:id="#+id/map"
tools:context=".MapsActivity"
android:name="com.google.android.gms.maps.SupportMapFragment" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.FloatingActionButton
android:id="#+id/fieldList"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_gravity="top|left"
android:layout_marginStart="11dp"
android:adjustViewBounds="true"
android:clickable="true"
android:fadeScrollbars="false"
android:src="#android:drawable/ic_menu_sort_by_size"
android:visibility="visible"
app:backgroundTint="#android:color/holo_orange_light"
app:fabSize="normal" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/updateMap"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignStart="#+id/fieldList"
android:layout_gravity="top|left"
android:layout_marginStart="65dp"
android:adjustViewBounds="true"
android:clickable="true"
android:fadeScrollbars="false"
android:src="#android:drawable/ic_popup_sync"
android:visibility="visible"
app:backgroundTint="#android:color/holo_orange_light"
app:fabSize="normal" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/myLocation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentTop="true"
android:layout_gravity="top|right"
android:layout_marginEnd="11dp"
android:adjustViewBounds="true"
android:clickable="true"
android:fadeScrollbars="false"
android:foregroundGravity="top|right"
android:src="#android:drawable/ic_menu_mylocation"
android:visibility="visible"
app:backgroundTint="#color/colorPrimaryDark"
app:fabSize="normal" />
<android.support.design.widget.TabLayout
android:id="#+id/tabMenu"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentStart="true"
android:background="#android:color/holo_orange_light"
android:foregroundGravity="bottom|center_vertical|center_horizontal|center"
app:tabIndicatorColor="#color/colorPrimary">
<android.support.design.widget.TabItem
android:id="#+id/userAccount"
android:foregroundGravity="bottom|center_vertical|center_horizontal|center"
android:icon="#android:drawable/ic_menu_myplaces"
android:visibility="visible" />
<android.support.design.widget.TabItem
android:id="#+id/infoMap"
android:foregroundGravity="bottom|center_vertical|center_horizontal|center"
android:icon="#android:drawable/ic_dialog_info"
android:visibility="visible" />
<android.support.v4.view.ViewPager
android:id="#+id/tabViewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.TabLayout>
</RelativeLayout>
</FrameLayout>
TabViewPagerAdapter.java
package com.thiagosaad.filadeatendimento.tab;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import java.util.ArrayList;
import java.util.List;
public class TabViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public TabViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFrag(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
UserAccountFragment.java
package com.thiagosaad.filadeatendimento.tab.fragments;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.thiagosaad.filadeatendimento.R;
/**
* Created by thiago.saad on 09/03/2018.
*/
public class UserAccountFragment extends Fragment {
public UserAccountFragment(){
// OBRIGATORIO TER O CONSTRUTOR VAZIO
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_user_account, container, false);
}
}

setSupportActionBar() is a method on AppCompatActivity.
Change
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback
to
public class MapsActivity extends AppCompatActivity implements OnMapReadyCallback

i have been using the navigation drawer and in case 1 i would like to run a google maps API inside a fragment.
but i get the following error:
'replace(int, android.app.Fragment)' in 'android.app.FragmentTransaction' cannot be applied to '(int, com.example.matant.test.MapFragment)'
this is the mainactivity:
package com.example.matant.test;
import android.app.ActionBar;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener {
private ActionBarDrawerToggle actbartoggle;
private android.support.v7.app.ActionBar actionbar;
private DrawerLayout drawer;
private ListView navlist;
private FragmentTransaction frmt;
private FragmentManager frm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
drawer = (DrawerLayout)findViewById(R.id.drawer);
navlist = (ListView)findViewById(R.id.navlist);
ArrayList<String> navArr = new ArrayList<String>();
navArr.add("Home");
navArr.add("Playing List");
navArr.add("Manage List");
navArr.add("Logout");
navlist.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,navArr);
navlist.setAdapter(adapter);
navlist.setOnItemClickListener(this);
actbartoggle = new ActionBarDrawerToggle(this,drawer,R.string.opendrawer,R.string.closedrawer);
drawer.setDrawerListener(actbartoggle);
actionbar = getSupportActionBar();
actionbar.setDisplayShowHomeEnabled(true);
actionbar.setDisplayHomeAsUpEnabled(true);
frm = getFragmentManager();
loadDefFrag(0);
}
private void loadDefFrag(int i){
navlist.setItemChecked(i,true);
if(i==1){
MapFragment mapf = new MapFragment();
frmt = frm.beginTransaction();
frmt.replace(R.id.fragmentholder, mapf);
frmt.commit();
}else if (i==2){
Fragment2 fr2 = new Fragment2();
frmt = frm.beginTransaction();
frmt.replace(R.id.fragmentholder, fr2);
frmt.commit();
}
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
actbartoggle.syncState();
}
#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_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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}else if (id == android.R.id.home){
if(drawer.isDrawerOpen(navlist)){
drawer.closeDrawer(navlist);
}else{
drawer.openDrawer(navlist);
}
}
return super.onOptionsItemSelected(item);
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch(position){
case 0:
break;
case 1:
loadDefFrag(position);
break;
case 2:
loadDefFrag(position);
break;
case 3:
break;
}
drawer.closeDrawer(navlist);
}
}
here you can see the mapactivity:
package com.example.matant.test;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import com.example.matant.test.R;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
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 MapFragment extends FragmentActivity implements OnMapReadyCallback {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_map);
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
#Override
public void onMapReady(GoogleMap map) {
// Add a marker in Sydney, Australia, and move the camera.
LatLng sydney = new LatLng(-34, 151);
map.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
map.moveCamera(CameraUpdateFactory.newLatLng(sydney));
}
}
main layout:
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/drawer"
>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/fragmentholder">
</FrameLayout>
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/navlist"
android:background="#dedede"
android:layout_gravity="start">
</ListView>
</android.support.v4.widget.DrawerLayout>
map layout:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" tools:context="com.example.matant.test.MapFragment">
<!-- TODO: Update blank fragment layout -->
<fragment 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:id="#+id/map"
tools:context=".MapsActivity"
android:name="com.google.android.gms.maps.SupportMapFragment" />
</FrameLayout>

You are trying to replace an Activity using FragmentManager. Only a Fragment can be used here.
Either start you MapFragment using startActivity() or extend MapFragment from a Fragment like this
public class MapFragment extends Fragment implements OnMapReadyCallback {
If you follow the second approach you will have to change few other lines in code too where you need context using getActivity()

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();

I have started building an application but I think I'm might be doing something wrong in the main structure. My application is 3 fragments, communicating with each other. The first fragment is about settings, the second one is an exandable array list. The third is a Gmap.
Clicking on a specific setting in the first fragment (that is a location) would make the gmap opens at the good spot... Same thing for child item in the second fragment.
I also would like to have a thread that update the current location of all fragments.
The this is, I don't know how I should structure my app. Is it good to have 3 fragments, should I use 3 activities? And how the communication should be made within fragments? I read that fragments should not communicate directly together, but in my case I don't see how the child of an exandable array list can not directly open the fragment containing GMap...
Here is a picture, just to figure out what my app would look like:
http://s14.postimg.org/ywj7yu8qp/Untitled.png
Here's the code so far:
MainActivity:
package com.stylingandroid.basicactionbar;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends Activity
{
private class MyTabListener implements ActionBar.TabListener
{
private Fragment mFragment;
private final Activity mActivity;
private final String mFragName;
public MyTabListener( Activity activity, String fragName )
{
mActivity = activity;
mFragName = fragName;
}
#Override
public void onTabReselected( Tab tab, FragmentTransaction ft )
{
// TODO Auto-generated method stub
}
#Override
public void onTabSelected( Tab tab, FragmentTransaction ft )
{
mFragment = Fragment.instantiate( mActivity, mFragName );
ft.add( android.R.id.content, mFragment );
}
#Override
public void onTabUnselected( Tab tab, FragmentTransaction ft )
{
ft.remove( mFragment );
mFragment = null;
}
}
#Override
public void onCreate( Bundle savedInstanceState )
{
super.onCreate( savedInstanceState );
// Intent intent;
ActionBar ab = getActionBar();
ab.setNavigationMode( ActionBar.NAVIGATION_MODE_TABS );
Tab tab = ab.newTab()
.setText( R.string.title_param )
.setTabListener(
new MyTabListener( this,
Param.class.getName() ) );
ab.addTab( tab );
// intent = new Intent().setClass(this, Friends.class);
tab = ab.newTab()
.setText( R.string.title_friends )
.setTabListener(
new MyTabListener( this,
Friends.class.getName() ) );
ab.addTab( tab );
tab = ab.newTab()
.setText( R.string.title_maps )
.setTabListener(
new MyTabListener( this,
Maps.class.getName() ) );
ab.addTab( tab );
}
#Override
public boolean onCreateOptionsMenu( Menu menu )
{
getMenuInflater().inflate( R.menu.main, menu );
return true;
}
#Override
public boolean onOptionsItemSelected( MenuItem item )
{
boolean ret;
if (item.getItemId() == R.id.menu_settings)
{
// Handle Settings
ret = true;
} else
{
ret = super.onOptionsItemSelected( item );
}
return ret;
}
}
Tab1:
package com.stylingandroid.basicactionbar;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
import android.app.Fragment;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class Param extends Fragment
{
Button btnShowLocation;
private View V;
TextView text;
public static double latitude;
public static double longitude;
// GPSTracker class
GPSTracker gps;
#Override
public View onCreateView( LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState )
{
V = inflater.inflate( R.layout.param, container, false );
gps = new GPSTracker(getActivity());
if(gps.canGetLocation()){
text = (TextView) V.findViewById(R.id.widget35);
latitude = gps.getLatitude();
longitude = gps.getLongitude();
String cityName=null;
Geocoder gcd = new Geocoder(getActivity(), Locale.getDefault());
List<Address> addresses;
try {
addresses = gcd.getFromLocation(latitude, longitude, 1);
if (addresses.size() > 0)
System.out.println(addresses.get(0).getLocality());
cityName=addresses.get(0).getLocality();
} catch (IOException e) {
e.printStackTrace();
}
// create class object
// check if GPS enabled
text.setText(cityName);
}else{
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
}
return V;
}
}
Tab2:
package com.stylingandroid.basicactionbar;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import android.app.Fragment;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.Toast;
public class Friends extends Fragment implements OnChildClickListener
{
private static List<Country> Countries;
private ExpandableListView expandableListView;
private CountryAdapter adapter;
private View V;
#Override
public View onCreateView( LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState )
{
V = inflater.inflate( R.layout.frag2, container, false );
expandableListView = (ExpandableListView) V.findViewById(R.id.expandableListView);
expandableListView.setOnChildClickListener(this);
LoadCountries();
return V;
}
private void LoadCountries() {
Countries = new ArrayList<Country>();
ArrayList<String> citiesAustralia = new ArrayList<String>(
Arrays.asList("Brisbanea", "Hobart", "Melbourne", "Sydney"));
Countries.add(new Country("Australia", citiesAustralia));
ArrayList<String> citiesChina = new ArrayList<String>(
Arrays.asList("Beijing", "Chuzhou", "Dongguan", "Shangzhou"));
Countries.add(new Country("China", citiesChina));
adapter = new CountryAdapter(getActivity(), Countries);
expandableListView.setAdapter(adapter);
}
#Override
public boolean onChildClick(ExpandableListView arg0, View arg1, int arg2,
int arg3, long arg4) {
/* Fragment param = new Param();
android.app.FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.frag2, param);
ft.addToBackStack(null);
ft.commit();
*/
Toast.makeText(getActivity(), "Clicked on Detail " , Toast.LENGTH_LONG).show();
return true;
}
}
Tab3:
package com.stylingandroid.basicactionbar;
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.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;
import android.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Maps extends Fragment
{
static final LatLng HAMBURG = new LatLng(Param.latitude, Param.longitude);
static final LatLng KIEL = new LatLng(53.551, 9.993);
private GoogleMap map;
View V;
#Override
public View onCreateView( LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState )
{
V = inflater.inflate( R.layout.frag1, container, false );
map = ((MapFragment) getActivity().getFragmentManager().findFragmentById(R.id.map))
.getMap();
Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
.title("Hamburg"));
// Move the camera instantly to hamburg with a zoom of 15.
map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));
// Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
GoogleMap gMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
gMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
gMap.setMyLocationEnabled(true);
gMap.getUiSettings().setCompassEnabled(true);
Log.e("Maps", "------EOC-------");
return V;
}
}
param.xml (tab1):
<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
android:id="#+id/widget0"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<ToggleButton
android:id="#+id/widget33"
android:layout_width="125dp"
android:layout_height="59dp"
android:textOn="I&apos;m free!"
android:textOff="I&apos;m free!"
android:layout_x="78dp"
android:layout_y="29dp" />
<TextView
android:id="#+id/widget34"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Lieu actuel"
android:layout_x="87dp"
android:layout_y="196dp" />
<TextView
android:id="#+id/widget35"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Indisponible"
android:layout_x="101dp"
android:layout_y="247dp" />
<TextView
android:id="#+id/widget36"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="GPS"
android:layout_x="89dp"
android:layout_y="108dp" />
<ToggleButton
android:id="#+id/widget37"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textOn="On"
android:textOff="Off"
android:layout_x="158dp"
android:layout_y="99dp" />
</AbsoluteLayout>
frag2.xml (tab2):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ExpandableListView
android:id="#+id/expandableListView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</LinearLayout>
frag1.xml (tab3):
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment" />
</RelativeLayout>
Here are only the principal fragments, I can also provide the full code of all classes if needed...
Questions:
Is it okay of what I began to do about how fragments work? Should I instead use activities? Is it okay how I proceeded to create fragment? Do I respect programming standard?
How to communicate from fragments to another? I use global variables so when something is updated, gmap (tab3) is also updated, but I don't see how to open the gmap fragment on a click.
The gmap is making the app crashing when I click two times on the gmap tab...?
Thanks a lot guys.

You can use all the fragments you want :)
I think the best way i to make an abstract Class to save and handle all you data and events.
In an abstract Class declare the method Static so you can call them directly on the Class.