Fragments in AppCompatActivity - android

Could I use this extension if I want to use Fragments in my swipe view activity?
public class Overview_Screen extends AppCompatActivity {
My Fragment classes use this one:
public class MessagesFragmentPortrait extends android.support.v4.app.Fragment {
I am asking this because my app keeps crashing...
Here is my main Activity:
public class Overview_Screen extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_overview_screen);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_overview_screen, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
Intent settings_intent = new Intent(this, Settings_Screen.class);
startActivity(settings_intent);
return true;
}
return super.onOptionsItemSelected(item);
}
public static class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int i) {
switch (i) {
case 0:
return new AccountFragmentPortrait();
case 1:
return new FeedFragmentPortrait();
default:
return new MessagesFragmentPortrait();
}
}
#Override
public int getCount() {
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Account";
case 1:
return "Feed";
case 2:
return "Messages";
}
return null;
}
}
}
and here is my stack trace:
FATAL EXCEPTION: main
Process: de.lukas_schroederoutlook.connect, PID: 3364
java.lang.RuntimeException: Unable to start activity ComponentInfo{de.lukas_schroederoutlook.connect/de.lukas_schroederoutlook.connect.Overview_Screen}:
android.view.InflateException: Binary XML file line #41: Binary XML file line #41: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: android.view.InflateException: Binary XML file line #41: Binary XML file line #41: Error inflating class fragment
Caused by: android.view.InflateException: Binary XML file line #41: Error inflating class fragment
Caused by: java.lang.NullPointerException
at java.lang.VMClassLoader.findLoadedClass(Native Method)
at java.lang.ClassLoader.findLoadedClass(ClassLoader.java:742)
at java.lang.ClassLoader.loadClass(ClassLoader.java:362)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at android.support.v4.app.Fragment.isSupportFragmentClass(Fragment.java:469)
at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2384)
at android.support.v4.app.FragmentController.onCreateView(FragmentController.java:120)
at android.support.v4.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:378)
at android.support.v4.app.BaseFragmentActivityHoneycomb.onCreateView(BaseFragmentActivityHoneycomb.java:33)
at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:77)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:777)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:858)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:284)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:143)
at de.lukas_schroederoutlook.connect.Overview_Screen.onCreate(Overview_Screen.java:42)
at android.app.Activity.performCreate(Activity.java:6679)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
And lastly, here is my overview screen xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="de.lukas_schroederoutlook.connect.Overview_Screen">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/appbar_padding_top"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme.PopupOverlay">
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/feed_fragment_portrait"/>
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/feed_fragment_landscape"/>
And my overview screen fragment 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: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="de.lukas_schroederoutlook.connect.Overview_Screen$PlaceholderFragment">
<TextView
android:id="#+id/section_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

You need to specify a class attribute in your <fragment> tags.
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/feed_fragment_portrait"/>
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/feed_fragment_landscape"/>
Add a class="your.packagename.SomeFragment" on both of those (if you actually need both... Typically you have different layout files for landspace and portrait, not have both in one)
It looks like you are using a ViewPager, though, so do you really need the <fragment> tags at all? I think you can remove them.

You need something like this:
<fragment
android:name="de.lukas_schroederoutlook.connect.FeedFragmentPortrait"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/feed_fragment_portrait"/>
Or use
class=
as cricket said.

Related

Binary XML file line #26: Error inflating class fragment in Android

I am getting error Error inflating class after running the code.
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.umairgulfad.bismillah, PID: 14270
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.umairgulfad.bismillah/com.example.umairgulfad.bismillah.MainActivity}: android.view.InflateException: Binary XML file line #26: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2697)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2771)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4380)
at android.app.ActivityThread.access$1000(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1438)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5912)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200)
Caused by: android.view.InflateException: Binary XML file line #26: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:770)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:813)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:511)
at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
at android.view.LayoutInflater.inflate(LayoutInflater.java:366)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:436)
at android.app.Activity.setContentView(Activity.java:2245)
at com.example.umairgulfad.bismillah.MainActivity.onCreate(MainActivity.java:73)
at android.app.Activity.performCreate(Activity.java:6185)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2650)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2771)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4380)
at android.app.ActivityThread.access$1000(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1438)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5912)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200)
Caused by: android.app.Fragment$InstantiationException: Trying to instantiate a class com.example.umairgulfad.bismillah.MainActivity$MyDetailFragment that is not a Fragment
at android.app.Fragment.instantiate(Fragment.java:618)
at android.app.Fragment.instantiate(Fragment.java:594)
at android.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2124)
at android.app.Activity.onCreateView(Activity.java:5523)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:740)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:813)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:511)
at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
at android.view.LayoutInflater.inflate(LayoutInflater.java:366)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:436)
at android.app.Activity.setContentView(Activity.java:2245)
at com.example.umairgulfad.bismillah.MainActivity.onCreate(MainActivity.java:73)
at android.app.Activity.performCreate(Activity.java:6185)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2650)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2771)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4380)
at android.app.ActivityThread.access$1000(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1438)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5912)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200)
Caused by: java.lang.ClassCastException
at android.app.Fragment.instantiate(Fragment.java:618)
at android.app.Fragment.instantiate(Fragment.java:594)
at android.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2124)
at android.app.Activity.onCreateView(Activity.java:5523)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:740)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:813)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:511)
at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
at android.view.LayoutInflater.inflate(LayoutInflater.java:366)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:436)
at android.app.Activity.setContentView(Activity.java:2245)
at com.example.umairgulfad.bismillah.MainActivity.onCreate(MainActivity.java:73)
at android.app.Activity.performCreate(Activity.java:6185)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2650)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2771)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4380)
at android.app.ActivityThread.access$1000(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1438)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5912)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200)
The code runs in portrait mode well but in going to landscape mode, app stopped working. What is wrong here. Thanks in advance.
Layout-land/activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="sw600dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<fragment
android:name="com.example.umairgulfad.bismillah.MainActivity$MyListFragment"
android:id="#+id/list_fragment"
android:layout_height="match_parent"
android:layout_width="0dp"
android:layout_weight="1" />
<fragment
android:name="com.example.umairgulfad.bismillah.MainActivity$MyDetailFragment"
android:id="#+id/detail_fragment"
android:layout_height="match_parent"
android:layout_width="0dp"
android:layout_weight="2" />
</LinearLayout>
</LinearLayout>
Layout/activity_main.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:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context=".MainActivity" >
<FrameLayout
android:layout_width="match_parent"
android:layout_height="250dp"
android:layout_weight="2"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:id="#+id/mapwhere" />
</LinearLayout>
Layout-land/detailfragment.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">
<TextView
android:id="#+id/title_detailfragment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Detail Fragment"/>
</LinearLayout>
MainActivity
import android.app.Activity;
import android.app.FragmentTransaction;
import android.app.ListFragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
public class MainActivity extends Activity implements OnMapReadyCallback {
// if run on phone, isSinglePane = true
// if run on tablet, isSinglePane = false
boolean isSinglePane;
static String[] month ={
"January", "February", "March", "April",
"May", "June", "July", "August",
"September", "October", "November", "December"};
#Override
public void onMapReady(GoogleMap googleMap) {
}
public static class MyListFragment extends ListFragment {
#Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
ListAdapter myArrayAdapter =
new ArrayAdapter<String>(
getActivity(), android.R.layout.simple_list_item_1, month);
setListAdapter(myArrayAdapter);
}
}
public class MyDetailFragment extends SupportMapFragment {
#Override
public View onCreateView(LayoutInflater layoutInflater, ViewGroup viewGroup, Bundle bundle) {
View rootView = layoutInflater.inflate(R.layout.detailfragment, viewGroup, false);
SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.mapwhere);
mapFragment.getMapAsync(new OnMapReadyCallback() {
#Override
public void onMapReady(GoogleMap googleMap) {
}
});
return rootView;
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
View v = findViewById(R.id.mapwhere);
if(v == null){
//it's run on tablet
isSinglePane = false;
/*
* MyListFragment and MyDetailFragment have been loaded in XML,
* no need load.
*/
}else{
//it's run on phone
//Load MyListFragment programmatically
isSinglePane = true;
if(savedInstanceState == null){
//if's the first time created
MyListFragment myListFragment = new MyListFragment();
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.mapwhere, myListFragment);
fragmentTransaction.commit();
}
}
}
}
I extend the ListFragment class with android.support.v4.app.ListFragment but now the error is in fragmentTransaction.add(R.id.mapwhere, myListFragment); line error is
Cannot resolve method:add(int,com.example.umairgulfad.bismillad.MainActivity.MyLis‌​tFragments)
Caused by: android.app.Fragment$InstantiationException: Trying to instantiate a class com.example.umairgulfad.bismillah.MainActivity$MyDetailFragment that is not a Fragment
There are two types of fragments: native ones and support/backport ones. You need to pick one type and stick with that.
As it stands, you are trying to use both:
You are using getFragmentManager() to add MyListFragment, indicating that MyListFragment extends android.app.ListFragment, not android.support.v4.app.ListFragment
You are using SupportMapFragment, which is a support/backport fragment

Data Binding in an Activity with a MapFragment

I would like to use Data Binding Library in one of my projects but I am getting an error in the activity who has a MapFragment. Not using data binding librery the code works perfectly
My xml main_activity file:
<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">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.Toolbar
android:id="#+id/my_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="4dp"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.project.activities.MainActivity" />
</RelativeLayout>
</layout>
And the baseActivity related
public abstract class BaseActivity extends AppCompatActivity {
private ActivityMainBinding binding;
private Toolbar toolbar;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
binding = DataBindingUtil.setContentView(this, getContentView());
setContentView(getContentView());//Crashes
getPresenter();
configureToolbar();
Log.d(Constans.LOG_TAG,"On create");
}
private void configureToolbar() {
toolbar = binding.myToolbar;
if (toolbar != null) {
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
}
#Override
protected void onStop() {
super.onStop();
Log.d(Constans.LOG_TAG,"On Stop");
}
#Override
protected void onResume() {
super.onResume();
Log.d(Constans.LOG_TAG,"On resume");
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return super.onCreateOptionsMenu(menu);
}
protected abstract int getContentView();
protected abstract void getPresenter();
}
And the error I get is :
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.project.activities.MainActivity}: android.view.InflateException: Binary XML file line #18: Binary XML file line #18: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2450)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2510)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5461)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: android.view.InflateException: Binary XML file line #18: Binary XML file line #18: Error inflating class fragment
at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:284)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.project.activities.MainActivity.BaseActivity.onCreate(BaseActivity.java:21)
at android.app.Activity.performCreate(Activity.java:6251)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2403)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2510) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5461) 
at java.lang.reflect.Method.invoke(Native Method)
The error itself is on onCreate(Bundle savedInstanceState) method on
setContentView(getContentView());
What I am doing wrong?
remove this line
setContentView(getContentView());//Crashes
and pass your layout resource to
binding = DataBindingUtil.setContentView(this, R.id.main_activity);
Your app crashes because you are trying to get the ContentView while it's null.
You will always need to call setContentView in your before trying to call getContentView.
Try:
setContentView(R.id.YOUR_LAYOUT_ID);//Crashes
binding = DataBindingUtil.setContentView(this, getContentView());

Error while setting custom view for each tab in Tab layout

I am getting error while setting up custom views for tabs in tab layout. Every tab runs fine on the first run, but when I swipe between tabs, runtime error appears. I am just trying out tab layout for the first time, can somebody help me with this ?
E/AndroidRuntime: FATAL EXCEPTION: main Process: com.rocks.mafia.entrancesecurity, PID: 18095
android.view.InflateException: Binary XML file line #6: Binary XML file line #6: Error inflating class fragment
at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at com.rocks.mafia.entrancesecurity.MainActivity$PlaceholderFragment.onCreateView(MainActivity.java:137)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2080)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1108)
at android.support.v4.app.FragmentManagerImpl.attachFragment(FragmentManager.java:1468)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:791)
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1638)
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:679)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1240)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1088)
at android.support.v4.view.ViewPager$3.run(ViewPager.java:275)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:894)
at android.view.Choreographer.doCallbacks(Choreographer.java:696)
at android.view.Choreographer.doFrame(Choreographer.java:628)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:880)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:207)
at android.app.ActivityThread.main(ActivityThread.java:5740)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:766)
Caused by: android.view.InflateException: Binary XML file line #6: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:782)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
at com.rocks.mafia.entrancesecurity.MainActivity$PlaceholderFragment.onCreateView(MainActivity.java:137) 
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2080) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1108) 
at android.support.v4.app.FragmentManagerImpl.attachFragment(FragmentManager.java:1468) 
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:791) 
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1638) 
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:679) 
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143) 
at android.support.v4.view.ViewPager.populate(ViewPager.java:1240) 
at android.support.v4.view.ViewPager.populate(ViewPager.java:1088) 
at android.support.v4.view.ViewPager$3.run(ViewPager.java:275) 
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:894) 
at android.view.Choreographer.doCallbacks(Choreographer.java:696) 
at android.view.Choreographer.doFrame(Choreographer.java:628) 
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:880) 
at android.os.Handler.handleCallback(Handler.java:815) 
at android.os.Handler.dispatchMessage(Handler.java:104) 
at android.os.Looper.loop(Looper.java:207) 
at android.app.ActivityThread.main(ActivityThread.java:5740) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:766) 
Caused by: java.lang.IllegalArgumentException: Binary XML file line #6: Duplicate id 0x7f0c009f, tag null, or parent id 0xffffffff with another fragment for com.rocks.mafia.entrancesecurity.HistoryFragment
at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2422)
at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
at android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:186)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:746)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) 
at android.view.LayoutInflater.rInflate(LayoutInflater.java:835) 
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:515) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
at com.rocks.mafia.entrancesecurity.MainActivity$PlaceholderFragment.onCreateView(MainActivity.java:137) 
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2080) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1108) 
at android.support.v4.app.FragmentManagerImpl.attachFragment(FragmentManager.java:1468) 
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:791) 
at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1638) 
at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:679) 
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143) 
at android.support.v4.view.ViewPager.populate(ViewPager.java:1240) 
at android.support.v4.view.ViewPager.populate(ViewPager.java:1088) 
at android.support.v4.view.ViewPager$3.run(ViewPager.java:275) 
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:894) 
at android.view.Choreographer.doCallbacks(Choreographer.java:696) 
at android.view.Choreographer.doFrame(Choreographer.java:628) 
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:880) 
at android.os.Handler.handleCallback(Handler.java:815) 
at android.os.Handler.dispatchMessage(Handler.java:104) 
at android.os.Looper.loop(Looper.java:207) 
at android.app.ActivityThread.main(ActivityThread.java:5740) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:766) 
MainActivity.java
package com.rocks.mafia.entrancesecurity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.support.design.widget.TabLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.os.Bundle;
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 AppCompatActivity {
/**
* 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.v4.app.FragmentStatePagerAdapter}.
*/
private SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setCurrentItem(1);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
#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
switch (id) {
case R.id.action_logout:
SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putBoolean(getString(R.string.isLogin), false);
editor.commit();
Intent intent = new Intent(this, WelcomeActivity.class);
startActivity(intent);
break;
case R.id.action_settings:
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* 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";
public PlaceholderFragment() {
}
/**
* 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;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (getArguments().getInt(ARG_SECTION_NUMBER) == 1) {
View rootView = inflater.inflate(R.layout.fragment_profile, container, false);
return rootView;
} else if (getArguments().getInt(ARG_SECTION_NUMBER) == 3) {
View rootView = inflater.inflate(R.layout.history_display, container, false);
return rootView;
}
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.section_label);
textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
}
/**
* 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 PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position + 1);
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Profile";
case 1:
return "Requests";
case 2:
return "History";
}
return null;
}
}
}
`
history_display.xml
<?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">
<fragment
android:id="#+id/historyFrag"
android:name="com.rocks.mafia.entrancesecurity.HistoryFragment"
android:layout_width="match_parent"
android:layout_height="match_parent">
</fragment>
</LinearLayout>
fragment_profile.xml
<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.rocks.mafia.entrancesecurity.ProfileFragment">
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="218dp"
android:background="#color/colorPrimary"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:layout_width="match_parent"
android:layout_height="150dp"
android:adjustViewBounds="true"
android:src="#drawable/ln_logo"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.7" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?android:attr/actionBarSize"
android:minHeight="?android:attr/actionBarSize"
app:layout_collapseMode="pin"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_profile" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/fab_margin"
android:src="#drawable/ic_star_black"
app:layout_anchor="#id/app_bar"
app:layout_anchorGravity="bottom|end" />
</android.support.design.widget.CoordinatorLayout>
</FrameLayout>
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: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="com.rocks.mafia.entrancesecurity.MainActivity$PlaceholderFragment">
<TextView
android:id="#+id/section_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
The answer is simple : don't use xml fragments at all. It is bad supported, has a lot of limitations, like that with which you met. The problem is that two same xml fragments ( without workarounds) couldn't exist together, because them share same fragment id. The crash happends when history fragment tried to recreate it's view, due to page changing process, but previous one still hadn't been garbage collected.
Sure, you still could setOffscreenPageLimit on ViewPager to 2 in your case ( all views will stay in memory) , but you should just remove you xml fragment and attach it programmatically if really needed.

Android navigation drawer crashes

I am trying to add a navigation drawer on my app following this google tutorial:
https://codelabs.developers.google.com/codelabs/material-design-style/index.html?index=..%2F..%2Findex#5
I've managed to add FAB button but when I add the navigation drawer my app crashes on my tablet. Why does it crash? This is the second tutorial I try and it also makes it crash.
public class Agenda extends AppCompatActivity
{
private Toolbar toolbar;
private FloatingActionButton fab;
private DrawerLayout mDrawerLayout;
private NavigationView navigationView;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
// Create Navigation drawer and inflate layout
navigationView = (NavigationView) findViewById(R.id.nav_view);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer);
// Adding menu icon to Toolbar
ActionBar supportActionBar = getSupportActionBar();
if (supportActionBar != null) {
supportActionBar.setHomeAsUpIndicator(R.drawable.ic_menu_white_24dp);
supportActionBar.setDisplayHomeAsUpEnabled(true);
}
// Set behavior of Navigation drawer
navigationView.setNavigationItemSelectedListener(
new NavigationView.OnNavigationItemSelectedListener() {
// This method will trigger on item Click of navigation menu
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
// Set item in checked state
menuItem.setChecked(true);
// TODO: handle navigation
// Closing drawer on item click
mDrawerLayout.closeDrawers();
return true;
}
});
mDrawerLayout.openDrawer(GravityCompat.START);
}
#Override
public boolean onCreateOptionsMenu(Menu menu){
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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
} else if (id == android.R.id.home) {
mDrawerLayout.openDrawer(GravityCompat.START);
}
return super.onOptionsItemSelected(item);
}
}
main xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.CoordinatorLayout
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/ll"
android:orientation="vertical">
<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"
/>
</LinearLayout>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right|bottom"
android:src="#drawable/ic_delete_black" />
</android.support.design.widget.CoordinatorLayout>
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/header"
app:menu="#menu/drawer" />
</android.support.v4.widget.DrawerLayout>
drawer xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single">
<item
android:icon="#drawable/ic_drafts_black"
android:tint="#color/button_grey"
android:title="One" />
<item
android:icon="#drawable/ic_drafts_black"
android:tint="#color/button_grey"
android:title="Two" />
<item
android:icon="#drawable/ic_drafts_black"
android:tint="#color/button_grey"
android:title="Three" />
</group>
</menu>
header 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="#dimen/navheader_height"
android:background="?attr/colorPrimaryDark"
android:orientation="vertical"
android:padding="#dimen/md_keylines">
</LinearLayout>
EDIT: This is the crash log:
[ 03-13 19:34:24.460 5057: 5057 E/AndroidRuntime ]
FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.cohen.agenda/com.cohen.agenda.Agenda}: android.view.InflateException: Binary XML file line #36: Error inflating class android.support.design.widget.NavigationView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2262)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2316)
at android.app.ActivityThread.access$700(ActivityThread.java:158)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1296)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5365)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #36: Error inflating class android.support.design.widget.NavigationView
at android.view.LayoutInflater.createView(LayoutInflater.java:619)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:693)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:752)
at android.view.LayoutInflater.inflate(LayoutInflater.java:495)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:276)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at com.cohen.agenda.Agenda.onCreate(Agenda.java:26)
at android.app.Activity.performCreate(Activity.java:5326)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1097)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2225)
... 11 more
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
at android.view.LayoutInflater.createView(LayoutInflater.java:593)
... 22 more
Caused by: android.view.InflateException: Binary XML file line #17: Error inflating class android.support.design.internal.NavigationMenuView
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.inflate(LayoutInflater.java:467)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at android.support.design.internal.NavigationMenuPresenter.getMenuView(NavigationMenuPresenter.java:96)
at android.support.design.widget.NavigationView.<init>(NavigationView.java:166)
at android.support.design.widget.NavigationView.<init>(NavigationView.java:95)
... 25 more
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.design.internal.NavigationMenuView" on path: /data/app/com.cohen.agenda-15.apk
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
at android.view.LayoutInflater.createView(LayoutInflater.java:558)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:693)
... 30 more

Android Hide ActionBar while scrolling in a ListView

I am looking for a method to hide actionbar like GooglePlay, when scrolling down and let the ActionBar reappear when scrolling up. I have found a lot of guides but them are about recyclerview and I am using listview.
The best guide I found is this: https://mzgreen.github.io/2015/06/23/How-to-hideshow-Toolbar-when-list-is-scrolling%28part3%29/.
This is my layout:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/FList" />
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.design.widget.CoordinatorLayout>
This is my error:
Process: com.mycompany.test, PID: 6172
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mycompany.test/com.mycompany.test.activities.Friends_List_Activity}: android.view.InflateException: Binary XML file line #2: Error inflating class android.support.design.widget.CoordinatorLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2329)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2389)
at android.app.ActivityThread.access$900(ActivityThread.java:147)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1296)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:117)
Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class android.support.design.widget.CoordinatorLayout
at android.view.LayoutInflater.createView(LayoutInflater.java:633)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
at de.robv.android.xposed.XposedBridge.invokeOriginalMethodNative(Native Method)
at de.robv.android.xposed.XposedBridge.handleHookedMethod(XposedBridge.java:684)
at android.view.LayoutInflater.inflate(Unknown Source)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:428)
at android.app.Activity.setContentView(Activity.java:2144)
at com.mycompany.test.activities.Friends_List_Activity.onCreate(Friends_List_Activity.java:26)
at android.app.Activity.performCreate(Activity.java:5933)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2282)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2389)
            at android.app.ActivityThread.access$900(ActivityThread.java:147)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1296)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693)
            at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:117)
EDIT:
Hiding the ActionBar on RecyclerView/ListView onScroll
In the guide above I can't use the code, I need to extend Activity so I am unable to use getSupportActionBar()
EDIT 2.0:
My activity:
public class Contacts_List_Activity extends Activity {
private SearchView mSearchView;
private Contacts_List_Adapter_OBJ ContactsAdapter;
private Menu menu;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_Contacts_list);
ContactsAdapter = new Contacts_List_Adapter_OBJ(this);
final ListView listView = (ListView) findViewById(R.id.Contacts);
listView.setAdapter(ContactsAdapter);
}
#Override
public boolean onCreateOptionsMenu(final Menu menu) {
this.menu = menu;
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_Contact_list_screen, menu);
mSearchView = (SearchView) menu.findItem(R.id.search).getActionView();
mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String s) {
return false;
}
#Override
public boolean onQueryTextChange(String s) {
Contacts_List_Adapter_OBJ FilterAdapter = ContactsAdapter;
if (TextUtils.isEmpty(s)) {
FilterAdapter.getFilter().filter("");
} else {
FilterAdapter.getFilter().filter(s.toLowerCase());
}
return true;
}
});
mSearchView.setOnSearchClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Set_MenuItem_Visible(false);
}
});
mSearchView.setOnCloseListener(new SearchView.OnCloseListener() {
#Override
public boolean onClose() {
Set_MenuItem_Visible(true);
return false;
}
});
final MenuItem searchMI = menu.findItem(R.id.search);
mSearchView.setOnQueryTextFocusChangeListener(new View.OnFocusChangeListener() {
#Override
public void onFocusChange(View view, boolean queryTextFocused) {
if (!queryTextFocused) {
searchMI.collapseActionView();
}
}
});
return true;
}
}
This is what I tried with the xml layout and it works :
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
The issue in your case seems to be the base Activity. Extend your Contacts_List_Activity with AppCompatActivity
Updated layout - adding app:layout_scrollFlags="scroll|enterAlways" to toolbar and
app:layout_behavior="#string/appbar_scrolling_view_behavior" to listview
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:id="#+id/FList" />
<android.support.design.widget.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
app:layout_scrollFlags="scroll|enterAlways"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.design.widget.CoordinatorLayout>

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