Develop Reference

ViewPager get invisible after coming from navigation drawer

I have been developing an app which contain navigation drawer on main page and on main page I have an framelayout in which I am displaying HomeFragment.java which contain viewPager.
The problem is when I launch my application the HomeFragment.java gets called and viewpager works fine. But when I click Home but in navigation drawer which call HomeFragment.java then the view pager gets invisible. Here are my code.
Please Help.
MainActivity.java
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import com.motomojoapp.R;
import com.motomojoapp.fragment.FragmentDrawer;
public class MainActivity extends AppCompatActivity implements FragmentDrawer.FragmentDrawerListener {
Toolbar toolbar;
TextView textView;
private FragmentDrawer drawerFragment;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar_white);
setToolbar();
drawerFragment = (FragmentDrawer)
getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout), toolbar);
drawerFragment.setDrawerListener(this);
FragmentManager fragmentManager = this.getSupportFragmentManager();
Fragment fragment = new HomeFragment(fragmentManager);
if (fragment != null) {
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.container_body, fragment);
fragmentTransaction.commit();
// set the toolbar title
getSupportActionBar().setTitle("");
}
}
public void setToolbar() {
toolbar.setTitle("");
textView = (TextView) findViewById(R.id.toolbar_title_white);
textView.setText(getResources().getString(R.string.home));
toolbar.setTitleTextColor(getResources().getColor(R.color.colorPrimary));
setSupportActionBar(toolbar);
}
#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, 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.notification) {
startActivity(new Intent(this, NotificationActivity.class));
return true;
}else if (id == R.id.map) {
startActivity(new Intent(this, MapActivity.class));
return true;
}
//noinspection SimplifiableIfStatement
return super.onOptionsItemSelected(item);
}
#Override
public void onDrawerItemSelected(View view, int position) {
displayView(position);
}
private void displayView(int position) {
switch (position) {
case 0:
FragmentManager fragmentManager = this.getSupportFragmentManager();
Fragment fragment = new HomeFragment(fragmentManager);
if (fragment != null) {
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.container_body, fragment);
fragmentTransaction.commit();
// set the toolbar title
getSupportActionBar().setTitle("");
}
break;
case 1:
case 2:
break;
default:
FragmentManager fragmentManager1 = this.getSupportFragmentManager();
Fragment fragment1 = new HomeFragment(fragmentManager1);
if (fragment1 != null) {
FragmentTransaction fragmentTransaction = fragmentManager1.beginTransaction();
fragmentTransaction.replace(R.id.container_body, fragment1);
fragmentTransaction.commit();
// set the toolbar title
getSupportActionBar().setTitle("");
}
break;
}
}
}
activity_main.xml
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="#+id/container_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<include
android:id="#+id/toolbar_white"
layout="#layout/toolbar_white" />
</LinearLayout>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/container_body"
android:layout_marginTop="6dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">
</FrameLayout>
</LinearLayout>
<fragment
android:id="#+id/fragment_navigation_drawer"
android:name="com.motomojoapp.fragment.FragmentDrawer"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:layout="#layout/fragment_navigation_drawer"
tools:layout="#layout/fragment_navigation_drawer" />
</android.support.v4.widget.DrawerLayout>
HomeFragment.java
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.ViewPager;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.motomojoapp.R;
import com.motomojoapp.customadapter.SlideAdapter;
public class HomeFragment extends Fragment {
private SlideAdapter adapter;
private ViewPager viewPager;
FragmentManager fragmentManager ;
public HomeFragment(FragmentManager fragmentManager) {
this.fragmentManager = fragmentManager;
}
public HomeFragment() {
// Required empty public constructor11
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_home, container, false);
viewPager = (ViewPager) rootView.findViewById(R.id.viewPager);
viewPager.setClipToPadding(false);
viewPager.setPageMargin(35);
adapter = new SlideAdapter(fragmentManager);
viewPager.setAdapter(adapter);
viewPager.setCurrentItem(adapter.FIRST_PAGE);
// Inflate the layout for this fragment
return rootView;
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
#Override
public void onDetach() {
super.onDetach();
}
}
fragment_home.xml
<LinearLayout 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:orientation="vertical">
<android.support.v4.view.ViewPager
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="250dp"
android:layout_marginTop="6dp"
android:paddingLeft="34dp"
android:paddingBottom="16dp"
android:paddingTop="16dp"
android:paddingRight="12dp" />
</LinearLayout>
SlideAdapter.java
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import com.motomojoapp.fragment.SlideFragment;
public class SlideAdapter extends FragmentPagerAdapter {
private int PAGES = 3;
// You can choose a bigger number for LOOPS, but you know, nobody will fling
// more than 1000 times just in order to test your "infinite" ViewPager :D
private int LOOPS = 1000;
public int FIRST_PAGE = PAGES * LOOPS / 2;
public SlideAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
}
#Override
public Fragment getItem(int position) {
position = position % PAGES;
return SlideFragment.newInstance(Integer.toString(position + 1));
}
#Override
public int getCount() {
return PAGES * LOOPS;
}
#Override
public float getPageWidth(int position) {
return 0.93f;
}
}
SlideFragment.java
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.TextView;
import com.motomojoapp.R;
public class SlideFragment extends Fragment {
private static final String ARG_PAGE_NUMBER = "pageNumber";
private String mParam;
private TextView tvPos;
public SlideFragment() {
// Required empty public constructor
}
public static SlideFragment newInstance(String pageNumber) {
Bundle args = new Bundle();
args.putString(ARG_PAGE_NUMBER, pageNumber);
SlideFragment fragment = new SlideFragment();
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam = getArguments().getString(ARG_PAGE_NUMBER);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
FrameLayout root = (FrameLayout) inflater.inflate(R.layout.fragment_slide, container, false);
tvPos = (TextView) root.findViewById(R.id.text);
tvPos.setText("Page " + mParam);
return root;
}
}

xml layout loads but my activity doesn't respond to button clicks

I'm new at this but I already made a small app that worked the same way.
I can't see what I'm doing wrong because the code looks quiet the same as my previous app.
When I run it or debug my app it shows my layout on my emulator so it does load the page that has to be loaded but that's all it does, it doesn't listen to button clicks. I also gives me no errors.
Here's my XML code for fragment_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context=".MainActivity$PlaceholderFragment">
<TextView
android:text="Eventaris"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:textSize="100px"
android:textStyle="bold"
android:id="#+id/lblEventaris"
/>
<LinearLayout
android:layout_width="500px"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:orientation="vertical"
android:id="#+id/login">
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="Gebruikersnaam"
android:id="#+id/txtGebruikersnaam"/>
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="Wachtwoord"
android:inputType="textPassword"
android:layout_below="#id/txtGebruikersnaam"
android:id="#+id/txtWachtwoord"/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Inloggen"
android:id="#+id/btnInloggen"
android:layout_below="#id/txtWachtwoord"/>
</LinearLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:layout_below="#id/login">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="nog geen account?"
android:gravity="center"
android:id="#+id/lblRegistratie"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Registeren"
android:id="#+id/btnRegistreren"
android:layout_below="#id/lblRegistratie"/>
</RelativeLayout>
</RelativeLayout>
Here's my fragmennt activity MainFragment.Java
package com.example.arno.eventaris;
import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import java.sql.SQLException;
/**
* Created by Arno on 28/04/2015.
*/
public class MainFragment extends Fragment {
private OnMainFragmentInteractionListener mListener;
private View view;
public MainFragment()
{
//required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
view=inflater.inflate(R.layout.fragment_main, container, false);
Button btnInloggen = (Button) view.findViewById(R.id.btnInloggen);
btnInloggen.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
try {
inloggen();
} catch (SQLException e) {
e.printStackTrace();
}
}
});
Button btnRegistreren = (Button) view.findViewById(R.id.btnRegistreren);
btnRegistreren.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v){
navigeerRegistratie();
}
});
return view;
}
#Override
public void onAttach(Activity activity)
{
super.onAttach(activity);
try{
mListener = (OnMainFragmentInteractionListener) activity;
}
catch (ClassCastException e)
{
throw new ClassCastException(activity.toString() + "must implement OnFragmentInteractionListener");
}
}
public void inloggen() throws SQLException {
EditText gebr=(EditText) view.findViewById(R.id.txtGebruikersnaam);
EditText wachtw=(EditText) view.findViewById(R.id.txtWachtwoord);
String gebruiker = gebr.getText().toString();
String wachtwoord = wachtw.getText().toString();
mListener.login(gebruiker, wachtwoord);
}
public void navigeerRegistratie()
{
mListener.navigeerRegistratie();
}
#Override
public void onDetach()
{
super.onDetach();
mListener = null;
}
public interface OnMainFragmentInteractionListener {
//Todo: Update argument type and name
public void login(String gebruiker, String wachtwoord) throws SQLException;
public void navigeerRegistratie();
}
}
Here is my Main Activity MainActivity.java
package com.example.arno.eventaris;
import android.app.DialogFragment;
import android.database.Cursor;
import android.graphics.Color;
import android.net.Uri;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.widget.LinearLayout;
import android.widget.Toast;
import com.example.arno.eventaris.Database.DBAdapter;
import java.sql.SQLException;
public class MainActivity extends ActionBarActivity implements MainFragment.OnMainFragmentInteractionListener,RegistratieFragment.OnRegistratieFragmentInteractionListener{
private Cursor gebruikerCursor;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
}
#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;
}
return super.onOptionsItemSelected(item);
}
#Override
public void login(String gebruiker, String wachtwoord) throws SQLException {
DBAdapter db = new DBAdapter(this);
db.open();
gebruikerCursor = db.getGebruiker(gebruiker);
if(gebruikerCursor.moveToFirst()) {
gebruikerCursor.moveToFirst();
String wwControle = gebruikerCursor.getString(gebruikerCursor.getColumnIndex("wachtwoord"));
if (wachtwoord.equals(wwControle)) {
HomeFragment fragment = new HomeFragment();
Bundle bundle = new Bundle();
bundle.putString("gebruikersnaam", gebruiker);
fragment.setArguments(bundle);
getFragmentManager().beginTransaction().replace(R.id.container, fragment).commit();
} else {
DialogFragment errorlogin = new ErrorLogin();
errorlogin.show(getFragmentManager(), "Wachtwoord incorrect!");
}
}
else
{
DialogFragment errorlogin = new ErrorLogin();
errorlogin.show(getFragmentManager(), "Gebruikersnaam incorrect!");
}
db.close();
}
#Override
public void navigeerRegistratie() {
getFragmentManager().beginTransaction().replace(R.id.container, new RegistratieFragment()).commit();
}
#Override
public void registreren(String gebruiker, String voornaam, String naam, String email, String wachtwoord, String herhaalWachtwoord) {
if(wachtwoord.equals(herhaalWachtwoord)) {
DBAdapter db = new DBAdapter(this);
db.open();
long id = db.insertGebruiker(gebruiker, voornaam, naam, email, wachtwoord);
getFragmentManager().beginTransaction().replace(R.id.container, new MainFragment()).commit();
}
else
{
DialogFragment errorregistratie = new ErrorRegistratie();
errorregistratie.show(getFragmentManager(), "Wachtwoorden komen niet overeen!");
}
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends 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;
}
}
}
And as last here is my activity_main.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:id="#+id/container"
android:layout_width="match_parent" android:layout_height="match_parent"
tools:context=".MainActivity" tools:ignore="MergeRootFrame" />
Thanks in advance!

Fixed it by making a new project with the same code, had to be a problem way deeper than my code.

Android Picasso Fragment Pic from URL

I've got problem to load pic from URL do my fragment by Picasso.
When I start app it's start without any errors but pic is not loading.
My app has one MainActivity and three fragments. Below I paste xml of mainlayout and one fragment class. The best for me is this scenario:
when user click button on fragment three(red on image), pic will load from url to imageView which is located on fragment two (yellow on image) above of fragment three.
Please help
package testowy.com.testowyfragment2;
import android.app.Activity;
import android.app.Fragment;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import com.squareup.picasso.Picasso;
/**
* Created by Administrator on 2015-07-04.
*/
public class Klasadown extends Fragment {
private klasadownlistener listener;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragmentdown, container, false);
ImageView img = (ImageView) view.findViewById(R.id.imgVV);
Context c = getActivity().getApplicationContext();
Picasso.with(c).load("http://inthecheesefactory.com/uploads/source/glidepicasso/cover.jpg")
.fit().into(img);
View.OnClickListener clickListener = new View.OnClickListener() {
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnMenu:
updateText("Menu");
SetImage();
break;
case R.id.btnKontakt:
updateText("Kontakt");
break;
default:
break;
}
}
};
Button btnMenu = (Button) view.findViewById(R.id.btnMenu);
Button btnKontakt = (Button) view.findViewById(R.id.btnKontakt);
btnKontakt.setOnClickListener(clickListener);
btnMenu.setOnClickListener(clickListener);
return view;
}
public interface klasadownlistener {
public void onItemSelected(String txt);
}
private void updateText(String txt) {
listener.onItemSelected(txt);
}
public void SetImage() {
ImageView img = (ImageView) getView().findViewById(R.id.imgVV);
Picasso.with(getActivity().getApplicationContext()).load("http://inthecheesefactory.com/uploads/source/glidepicasso/cover.jpg").into(img);
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
if (activity instanceof klasadownlistener) {
listener = (klasadownlistener) activity;
} else {
throw new ClassCastException(activity.toString() + " musi implementowa� interfejs: OverviewFragment.OverviewFragmentActivityListener");
}
}
}
<LinearLayout 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:orientation="vertical"
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/fragmentup"
class="testowy.com.testowyfragment2.Klasaup"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="5">
</fragment>
<fragment
android:id="#+id/fragmentcenter"
class="testowy.com.testowyfragment2.Klasacenter"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="3">
</fragment>
<fragment
android:id="#+id/fragmetdown"
class="testowy.com.testowyfragment2.Klasadown"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="3">
</fragment>
</LinearLayout>
package testowy.com.testowyfragment2;
import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
/**
* Created by Administrator on 2015-07-04.
*/
public class Klasacenter extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater
.inflate(R.layout.fragmentcenter, container, false);
return view;
}
public void SetText(String txt){
TextView view = (TextView) getView().findViewById(R.id.fragmentcenterText);
view.setText(txt);
}
}
package testowy.com.testowyfragment2;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ImageView;
import com.squareup.picasso.Picasso;
public class MainActivity extends Activity implements Klasadown.klasadownlistener{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public void onItemSelected(String txt) {
Klasacenter fragment = (Klasacenter) getFragmentManager()
.findFragmentById(R.id.fragmentcenter);
// sprawdzamy czy fragment istnieje w tej aktywno�ci
if (fragment != null && fragment.isInLayout()) {
// ustawiamy teskt we fragmencie
fragment.SetText(txt);
ImageView img = (ImageView) findViewById(R.id.imgV);
Picasso.with(this).load("http://inthecheesefactory.com/uploads/source/glidepicasso/cover.jpg").fit().into(img);
}
}
}

It's stupid to say but I forget to add internet permission:)
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
now everything is ok!

how to display dialog when moving from 1 tab to another - implementation uses Fragments in Android

I have created a fragment activity with 3 tabs. When I move from tab 1 to tab 3, it takes around 5 seconds to load tab 3( due to some time consuming task ). During this loading time, I want to show a dialog.
I put the dialog inside onTabSelected(), but the dialog shows up only after the 3rd tab display comes up. I want it to show between "the time I clicked the 3rd tab" and "the time the 3rd tab actually comes up". Please do let me know ur suggestions.
Editted :
Sample code :
MainActivity.java:
package com.example.trial;
import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.view.Window;
public class MainActivity extends FragmentActivity implements
ActionBar.TabListener {
private static final String STATE_SELECTED_NAVIGATION_ITEM ="selected_navigation_item";
ProgressDialog nDialog;
Fragment dashboardFrag = new DashboardTab();
Fragment Tab1 = new Tab1();
Fragment Tab2 = new Tab2();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.activity_main);
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionBar.addTab(actionBar.newTab().setText("Tab1")
.setTabListener(this));
actionBar.addTab(actionBar.newTab().setText("Tab2")
.setTabListener(this));
actionBar.addTab(actionBar.newTab().setText("Tab3")
.setTabListener(this));
}
#Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
if (savedInstanceState.containsKey(STATE_SELECTED_NAVIGATION_ITEM)) {
getActionBar().setSelectedNavigationItem(
savedInstanceState.getInt(STATE_SELECTED_NAVIGATION_ITEM));
}
}
#Override
public void onSaveInstanceState(Bundle outState) {
outState.putInt(STATE_SELECTED_NAVIGATION_ITEM, getActionBar()
.getSelectedNavigationIndex());
}
#Override
public void onTabUnselected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
}
#Override
public void onTabSelected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
if (tab.getPosition() == 0) {
getSupportFragmentManager().beginTransaction()
.replace(R.id.container, Tab1).commit();
}
else if (tab.getPosition() == 1) {
getSupportFragmentManager().beginTransaction()
.replace(R.id.container, Tab2).commit();
}
else if (tab.getPosition() == 2) {
showProgress1();
getSupportFragmentManager().beginTransaction()
.replace(R.id.container, dashboardFrag).commit();
}
}
void showProgress1(){
nDialog = new ProgressDialog(MainActivity.this); //Here I get an error: The constructor ProgressDialog(PFragment) is undefined
nDialog.setMessage("Loading..");
nDialog.setTitle("Fetching Data");
nDialog.setIndeterminate(false);
nDialog.setCancelable(true);
nDialog.show();
}
#Override
public void onTabReselected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
}
}
Tab1.java
package com.example.trial;
import android.os.Bundle;
import android.support.v4.app.Fragment;
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.tab1, container, false);
return rootView;
}
}
Tab2.java
package com.example.trial;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Tab2 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.tab2, container, false);
return rootView;
}
}
DashboardTab.java
package com.example.trial;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class DashboardTab extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.dashboard, container, false);
try {
Thread.sleep(5*1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return rootView;
}
}
activity_main.xml
<FrameLayout android:id="#+id/container" android:layout_height="match_parent" android:layout_width="match_parent" tools:context=".MainActivity" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools">
</FrameLayout>
tab1.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:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Tab1"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
tab2.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:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="tab2"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
dashboard.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:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="dashBoard"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>

I didn't find something like you are telling, may be you are having issues with your phone memory, however an approach to show dialog when performing time consuming tasks through your code
public class DashboardTab extends Fragment {
private ProgressDialog nDialog;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.dashboard, container, false);
showProgress1();
YourTimeConsumingTask();
nDialog.dismiss();
return rootView;
}
private void YourTimeConsumingTask(){
try {
Thread.sleep(5 * 1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
void showProgress1() {
nDialog = new ProgressDialog(getActivity()); // Here I get an error:
// The constructor
// ProgressDialog(PFragment)
// is undefined
nDialog.setMessage("Loading..");
nDialog.setTitle("Fetching Data");
nDialog.setIndeterminate(false);
nDialog.setCancelable(true);
nDialog.show();
}
}

Previous Fragment appears on orientation change in current fragment

I have 2 fragments . In the first fragment there is a button which on clicking will move to 2 nd fragment. When the screen is rotated in this 2nd fragment,after orientation change I see first fragment instead of 2nd fragment. Can anyone help me in solving this issue?
The code is as below :
Activity code:
package com.andr.fragmentsorientationdemo;
import android.os.Bundle;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.view.Menu;
public class OrientationActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_orientation);
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction =
fragmentManager.beginTransaction();
fragmentTransaction.replace(android.R.id.content, new Fragmentone()).commit();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.orientation, menu);
return true;
}
}
<br>Code for FragmentOne <br>
=============================
package com.andr.fragmentsorientationdemo;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
public class Fragmentone extends Fragment{
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_one, container, false);
Button b = (Button)v.findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View arg0) {
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction =
fragmentManager.beginTransaction();
fragmentTransaction.replace(android.R.id.content, new Fragmenttwo()).addToBackStack(null).commit();
}
});
return v;
}
}
<br>code for Fragmenttwo
===================
package com.andr.fragmentsorientationdemo;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
/**
* #author 245742
*
*/
public class Fragmenttwo extends Fragment{
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_two, container, false);
Button b = (Button)v.findViewById(R.id.button1);
return v;
}
}
<br>layout file for fragmentone <br>
=====================================
<?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" >
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
</LinearLayout>
<br> Layout for fragmenttwo
==============================
<?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" >
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button2222222222" />
</LinearLayout>
Can anyone help me in solving this issue.

Try this-
FragmentManager fragmentManager =null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_orientation);
if(fragmentManager==null){
fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction =
fragmentManager.beginTransaction();
fragmentTransaction.replace(android.R.id.content, new Fragmentone()).commit();
}
}
or else
use this in manifest's activity tag-
android:configChanges="orientation"