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setDrawerLockMode disable the drawerLayout

Hi guys I search on google about how to disable the swipe that open the drawerLayout i found this 2 codes.
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED, GravityCompat.END);
but these 2 codes disable the opening of drawerLayout from the swipe and from the actionBarDrawerToggle like disabling it at all. Now the question is how can i disable the swipe that opens the drawerLayout without disabling the open by the ActionBarDrawerToggle. This is my application codes.
MainActivity.java
package co.pilot.assist;
import android.os.Bundle;
import android.widget.ImageView;
import androidx.appcompat.widget.Toolbar;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.drawerlayout.widget.DrawerLayout;
public class MainActivity extends AppCompatActivity {
private DrawerLayout _drawer;
private Toolbar _toolbar;
private boolean isOpen;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
_drawer = findViewById(R.id._drawer);
_toolbar = findViewById(R.id._toolbar);
drawerSetUp();
}
private void drawerSetUp() {
ActionBarDrawerToggle _toggle = new ActionBarDrawerToggle(MainActivity.this, _drawer, _toolbar,
R.string.app_name, R.string.app_name);
_drawer.addDrawerListener(_toggle);
_toggle.syncState();
_drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
}
}
main.xml
<androidx.drawerlayout.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"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:openDrawer="start" >
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:id="#+id/_coordinator"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/_app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<androidx.appcompat.widget.Toolbar
android:id="#+id/_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/arsenic_92" />
</com.google.android.material.appbar.AppBarLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:orientation="vertical" >
<androidx.viewpager.widget.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:padding="8dp" />
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottom_nav"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/arsenic_90"
app:menu="#menu/main_bottom_nav_menu" />
</LinearLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
<LinearLayout
android:id="#+id/_nav_view"
android:layout_width="320dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#EEEEEE" >
<include layout="#layout/_drawer_main" />
</LinearLayout>
</androidx.drawerlayout.widget.DrawerLayout>

Black space under action bar

I'm trying my to learn basic app design and already made some simple stuff.
Now I'm getting stuck on the following.
How to get rid of this blank space underneath the action bar?
I've tried to hide the action bar but this won't remove the blank space.
I'm thinking it has something to do with the host fragment but am not sure how to solve this.
Here is my: MainActivity.java
package com.example.mapexplorerv8;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
import com.google.android.material.bottomnavigation.BottomNavigationView;
import androidx.appcompat.app.AppCompatActivity;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
import com.example.mapexplorerv8.databinding.ActivityMainBinding;
public class MainActivity extends AppCompatActivity {
private AppBarConfiguration mAppBarConfiguration;
private ActivityMainBinding binding;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//requestWindowFeature(Window.FEATURE_NO_TITLE);
//this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
//getSupportActionBar().hide();
binding = ActivityMainBinding.inflate(getLayoutInflater());
setContentView(binding.getRoot());
BottomNavigationView navView = findViewById(R.id.nav_view);
// Passing each menu ID as a set of Ids because each
// menu should be considered as top level destinations.
AppBarConfiguration appBarConfiguration = new AppBarConfiguration.Builder(
R.id.navigation_home, R.id.navigation_map_view, R.id.navigation_notifications)
.build();
NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment_activity_main);
NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration);
NavigationUI.setupWithNavController(binding.navView, navController);
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:paddingTop="?attr/actionBarSize">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/nav_view"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="0dp"
android:layout_marginEnd="0dp"
app:itemTextColor="#color/white"
android:background="#color/black"
app:itemIconTint="#color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="#menu/bottom_nav_menu" />
<fragment
android:id="#+id/nav_host_fragment_activity_main"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="false"
app:layout_constraintBottom_toBottomOf="#+id/nav_view"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
app:navGraph="#navigation/mobile_navigation" />
</androidx.constraintlayout.widget.ConstraintLayout>
fragment_home
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ui.home.HomeFragment">
<TextView
android:id="#+id/text_home"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="0dp"
android:layout_marginEnd="8dp"
android:textAlignment="center"
android:textSize="20sp"
android:textColor="#color/white"
android:background="#color/black"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

Your activity_main.xml is causing padding at the top. To be more specific, you have android:paddingTop="?attr/actionBarSize" set to your root ConstraintLayout with the id container. Remove this padding and you should get rid of that empty space there.
Final solution for activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/nav_view"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="0dp"
android:layout_marginEnd="0dp"
app:itemTextColor="#color/white"
android:background="#color/black"
app:itemIconTint="#color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="#menu/bottom_nav_menu" />
<fragment
android:id="#+id/nav_host_fragment_activity_main"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="false"
app:layout_constraintBottom_toBottomOf="#+id/nav_view"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0"
app:navGraph="#navigation/mobile_navigation" />
</androidx.constraintlayout.widget.ConstraintLayout>

Toolbar logo not clickable but still functioning as drawer

The burger drawer functioning well, however the toolbar logo didnt work when i click it. I checked everyting however i didnt find whats wrong. i tried working it on clean acvitivity and the logo and drawer really works. the drawer only works only when i slide it to the right. please really appreciate it thank you for helping.
heres my xml file
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.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:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/bordergreen4"
tools:context=".duashome"
android:id="#+id/drawer_layout"
android:fitsSystemWindows="true">
<com.google.android.material.navigation.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
app:headerLayout="#layout/header"
app:menu="#menu/menu_drawer"
android:layout_gravity="start"
android:layout_height="match_parent"/>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#drawable/bordergreen4"
tools:context=".home">
<LinearLayout
android:id="#+id/duasupperlayout"
android:layout_width="match_parent"
android:layout_height="200dp"
app:layout_constraintEnd_toStartOf="parent"
app:layout_constraintStart_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:orientation="vertical">
<androidx.appcompat.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:logo="#drawable/ic_baseline_dehaze_24"
android:id="#+id/toolbar">
</androidx.appcompat.widget.Toolbar>
</LinearLayout>
<androidx.cardview.widget.CardView
android:id="#+id/cardView"
android:layout_width="200dp"
android:layout_height="50dp"
android:layout_marginTop="100dp"
android:elevation="16dp"
app:cardCornerRadius="10dp"
app:layout_constraintBottom_toBottomOf="#+id/duasupperlayout"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#2E856E"
android:fontFamily="#font/hallington"
android:gravity="center"
android:text="List of Duas"
android:textColor="#color/white"
android:textSize="30sp">
</TextView>
</androidx.cardview.widget.CardView>
<RelativeLayout
android:id="#+id/duaslowerlayout"
android:layout_width="match_parent"
android:layout_height="70dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="parent"
app:layout_constraintStart_toEndOf="parent">
</RelativeLayout>
<ScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="#+id/duaslowerlayout"
app:layout_constraintEnd_toStartOf="parent"
app:layout_constraintStart_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#+id/duasupperlayout">
<RelativeLayout
android:layout_width="match_parent"
android:gravity="center"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="Dua Tawassul">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="Dua Kumayl">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="Dua Azumal Bala">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
<Button
android:layout_width="300dp"
android:layout_height="match_parent"
android:text="sdsds">
</Button>
</LinearLayout>
</RelativeLayout>
</ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.drawerlayout.widget.DrawerLayout>
and java
package com.example.munajat;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.view.GravityCompat;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.appcompat.widget.Toolbar;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import com.google.android.material.navigation.NavigationView;
public class duashome extends AppCompatActivity {
//variablesmenudrawer
DrawerLayout drawerLayout;
NavigationView navigationView;
Toolbar toolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_duashome);
//definingmenudrawer
drawerLayout = findViewById(R.id.drawer_layout);
navigationView = findViewById(R.id.nav_view);
toolbar = findViewById(R.id.toolbar);
//toolbar
setSupportActionBar(toolbar);
//navdrawermenu
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawerLayout.addDrawerListener(toggle);
toggle.syncState();
}
#Override
public void onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)) {
drawerLayout.closeDrawer(GravityCompat.START);
}
else {
super.onBackPressed();
}
}
}

You need to add the Toolbar to the ActionBarDrawerToggle.
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);

Collapsing Toolbar Layout - Textview hide behind Actionbar

I have a problem with my textview. The textview is always hiding behind the Actionbar when the page is scrolled, but I want it to stay at the top of the screen.
There is image example: Screenshot
Here is my code in the activity_main.xml and MainActivity.java file.
activity_main.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:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true"
android:layout_height="280dip"
app:elevation="0dip"
android:background="#color/colorLightGreen"
app:expanded="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:contentScrim="#76BC18"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:titleEnabled="false"
app:statusBarScrim="#color/colorLightGreen">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:background="#drawable/salmon"
android:id="#+id/profile_id"
app:layout_collapseMode="parallax"/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="56dip"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:text="#string/food"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/textView"
android:textAppearance="#style/expandedappbar"
android:background="#color/colorLightGreen" />
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="30dip"
android:paddingTop="35dip"
android:paddingLeft="15dip"
android:background="#android:color/background_light">
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="match_parent">
<TextView
android:text="#string/cena_pro_studenta"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView3"
android:layout_weight="1"
android:textAppearance="#style/collapsedappbar"/>
<TextView
android:text="37 Kč"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView2"
android:layout_weight="1"
android:paddingLeft="7dip"
android:textAppearance="#style/collapsedappbar" />
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:text="#string/alergeny"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView5"
android:textAppearance="#style/collapsedappbar"
android:layout_marginTop="10dip" />
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/listView"
android:layout_marginTop="15dip"
android:divider="#null"
android:dividerHeight="0dip"
android:layout_marginLeft="0dip" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="30dip"
android:background="#ECEFF0"
android:paddingBottom="15dip"
android:paddingLeft="15dip">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_height="match_parent"
app:srcCompat="#drawable/smile"
android:id="#+id/imageView"
android:scaleType="fitStart"
android:layout_width="45dip" />
<TextView
android:text="#string/Prumer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView4"
android:layout_weight="1"
android:textAppearance="#style/collapsedappbar"
android:layout_marginLeft="15dip" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="match_parent">
<Button
android:text="#string/hodnotenie"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/button2"
android:layout_weight="1"
android:background="#android:color/transparent"
android:theme="#style/AppTheme.Button"
android:layout_marginTop="5dip" />
<Button
android:text="#string/pridej_foto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/button"
android:layout_weight="1"
android:background="#android:color/transparent"
android:theme="#style/AppTheme.Button"
android:layout_marginLeft="15dip"
android:layout_marginTop="5dip" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="30dip"
android:paddingTop="30dip"
android:paddingLeft="15dip"
android:background="#android:color/background_light">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
app:srcCompat="#drawable/alert"
android:id="#+id/imageView2"
android:layout_height="25dip"
android:layout_width="45dip"
android:scaleType="fitStart"/>
<TextView
android:text="#string/OpravaText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView6"
android:layout_weight="1"
android:textAppearance="#style/collapsedappbar"
android:layout_marginLeft="15dip" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="match_parent">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/button3"
android:layout_weight="1"
android:text="#string/nahlasit_chybu"
android:background="#android:color/transparent"
android:theme="#style/AppTheme.Button"
android:layout_marginLeft="60dip"
android:layout_marginTop="5dip" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
MainActivity.java
import android.os.Bundle;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListAdapter;
import android.widget.ListView;
public class MainActivity extends AppCompatActivity {
private CollapsingToolbarLayout collapsingToolbarLayout = null;
private ListView listView;
String[] listItems = {"Obiloviny obsahujíci lepek" , "Podzemnice ojelná (arašidy)"};
Integer[] imgid={
R.drawable.pic1,
R.drawable.pic2,
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setTitle(null);
collapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
CustomAdapter adapter=new CustomAdapter(this, listItems, imgid);
listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(adapter);
setListViewHeightBasedOnChildren(listView);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
/* Metoda pre zobrazenie celého ListView */
public static void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
return;
}
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight
+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
}
}

button BACK to a collapsingToolbar - Android

It happens that from my main activity I call an activity in that activity that I call tale with collapsingToolbar, well everything works fine only that I can not give BACK because the collapsinToolbar does not generate a button back.
Java code of the main activity
package com.herprogramacion.alquileres;
import android.database.Cursor;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import com.herprogramacion.alquileres.provider.Contrato.Alquileres;
public class ActividadListaAlquileres extends AppCompatActivity implements AdaptadorAlquileres.OnItemClickListener, LoaderManager.LoaderCallbacks<Cursor> {
private RecyclerView listaUI;
private LinearLayoutManager linearLayoutManager;
private AdaptadorAlquileres adaptador;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.actividad_lista_alquileres);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Filtro...", Snackbar.LENGTH_LONG)
.setAction("Acción", null).show();
}
});
// Preparar lista
listaUI = (RecyclerView) findViewById(R.id.lista);
listaUI.setHasFixedSize(true);
linearLayoutManager = new LinearLayoutManager(this);
listaUI.setLayoutManager(linearLayoutManager);
adaptador = new AdaptadorAlquileres(this, this);
listaUI.setAdapter(adaptador);
// Iniciar loader
getSupportLoaderManager().restartLoader(1, null, this);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_actividad_lista_alquileres, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onClick(AdaptadorAlquileres.ViewHolder holder, String idAlquiler) {
// Snackbar.make(findViewById(android.R.id.content), ":id = " + idAlquiler,
// Snackbar.LENGTH_LONG).show();
}
#Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
return new CursorLoader(this, Alquileres.URI_CONTENIDO, null, null, null, null);
}
#Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
if (adaptador != null) {
adaptador.swapCursor(data);
}
}
#Override
public void onLoaderReset(Loader<Cursor> loader) {
}
}
Java code of the activity where I generate the collapsingToolbar
package com.herprogramacion.alquileres;
import android.content.Intent;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
public class biografia2 extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_biografia2);
CollapsingToolbarLayout collapsingToolbar =
(CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
collapsingToolbar.setTitle("Titulo ");
}
}
Xml code of my main activity
<?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:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.herprogramacion.alquileres.ActividadListaAlquileres">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
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:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="#layout/contenido_actividad_lista_alquileres" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
android:src="#drawable/icono_filtro" />
</android.support.design.widget.CoordinatorLayout>
Xml code of the activity where I generate the collapsingToolbar
<?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/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="#dimen/detail_backdrop_height"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp" >
<ImageView
android:id="#+id/backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax"
android:src="#drawable/jack"
android:alpha="0.5"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="170dp"
android:layout_gravity="center">
</RelativeLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingTop="24dp">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="#dimen/card_margin">
<LinearLayout
style="#style/Widget.CardContent"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Info"
android:textAppearance="#style/TextAppearance.AppCompat.Title" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/lorem_ipsum" />
</LinearLayout>
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/card_margin"
android:layout_marginLeft="#dimen/card_margin"
android:layout_marginRight="#dimen/card_margin">
<LinearLayout
style="#style/Widget.CardContent"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Friends"
android:textAppearance="#style/TextAppearance.AppCompat.Title" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/lorem_ipsum" />
</LinearLayout>
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/card_margin"
android:layout_marginLeft="#dimen/card_margin"
android:layout_marginRight="#dimen/card_margin">
<LinearLayout
style="#style/Widget.CardContent"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Related"
android:textAppearance="#style/TextAppearance.AppCompat.Title" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/lorem_ipsum" />
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
<android.support.design.widget.FloatingActionButton
android:layout_height="wrap_content"
android:layout_width="wrap_content"
app:layout_anchor="#id/appbar"
app:layout_anchorGravity="bottom|right|end"
android:src="#drawable/ic_discuss"
android:layout_margin="#dimen/fab_margin"
android:clickable="true"/>
</android.support.design.widget.CoordinatorLayout>

You can add back navigation icon in the xml for Toolbar component using app:navigationIcon attribute.
<android.support.v7.widget.Toolbar
android:id="#+id/materialup.toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?attr/actionBarSize"
app:layout_scrollFlags="scroll"
app:navigationIcon="?homeAsUpIndicator" />

You should be able to show the default back button using setDisplayHomeAsUpEnabled:
final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);