Develop Reference

I want to add horizontally scrolled card view in recyclerview on my Homefragment.java class

Here is my MainActivity.java class
package com.example.bottomnavigationdrawer;
import androidx.appcompat.app.AppCompatActivity;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.NavigationUI;
import androidx.viewpager.widget.ViewPager;
import android.os.Bundle;
import com.google.android.material.bottomnavigation.BottomNavigationView;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
BottomNavigationView bottomNavigationView=findViewById(R.id.bottomNavigationView);
NavController navController= Navigation.findNavController(this,R.id.nav_host_fragment);
NavigationUI.setupWithNavController(bottomNavigationView,navController);
}
}
Here is my 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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottomNavigationView"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:itemTextColor="#00FAF7F7"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:menu="#menu/bottom_nav_menu" />
<fragment
android:id="#+id/nav_host_fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="0dp"
android:layout_height="0dp"
app:defaultNavHost="true"
app:layout_constraintBottom_toTopOf="#+id/bottomNavigationView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navGraph="#navigation/nav_graph" />
</androidx.constraintlayout.widget.ConstraintLayout>
Here is my HomeFragment.java class:
package com.example.bottomnavigationdrawer;
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.smarteist.autoimageslider.SliderView;
/**
* A simple {#link Fragment} subclass.
*/
public class HomeFragment extends Fragment {
public HomeFragment() {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_home, container, false);
SliderView imageView = (SliderView) view.findViewById(R.id.imageSlider);
return view;
}}
Here is my fragment_home.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingBottom="3dp"
android:paddingLeft="3dp"
android:paddingRight="3dp"
android:paddingTop="3dp"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".HomeFragment">
<!-- TODO: Update blank fragment layout -->
<TextView
android:gravity="center"
android:textSize="70sp"
android:textColor="#FAF8F8"
android:background="#25212E"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Home" />
</RelativeLayout>
I am new in Android, and I have searched a lot about it. But every tutorial I get they do this with main activity, model,adapter. But I have to do it on my home fragment in main activity.

Actually I don't understand your question. If you want to learn about recyclerview and card view and bottom navigation view, follow this tutorial:
https://www.androidhive.info/2016/01/android-working-with-recycler-view/
https://www.androidhive.info/2017/12/android-working-with-bottom-navigation/
It's very easy. If you want to set scroll horizontal use LinearLayoutManager like this
LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
RecyclerView myRecyclerView= (RecyclerView) findViewById(R.id.my_recycler_view);
myRecyclerView.setLayoutManager(layoutManager);

Collapsing Toolbar Layout not working in Fragment - Android

When i try to impliment collapsingbar in fragment it's not collapsing, but when i try the same code in a simple activity it works fine, and i want the same design in a fragment(ProfileFragment), there is no error occurs it just simply displayed but its not collapsing, and i want to make it working fine please help me, look on my code i want to impliment.
This is my XML
<android.support.constraint.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"
android:clickable="true"
android:focusable="true"
tools:context="com.turbo.ashish.hexon.BottomNavFragment.ProfileFragment">
<!-- TODO: Update blank fragment layout -->
<android.support.design.widget.AppBarLayout
android:id="#+id/idProfileWallappbar"
android:layout_width="match_parent"
android:layout_height="238dp">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/idcollapsbarlayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:contentScrim="?attr/colorAccent"
app:expandedTitleMarginBottom="20dp"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="20dp"
app:layout_scrollFlags="exitUntilCollapsed|scroll"
app:title="#string/title_profile">
<ImageView
android:id="#+id/idImageViewCollapsingToolbarLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<android.support.v7.widget.Toolbar
android:id="#+id/idtoolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/custColtransparante"
app:layout_collapseMode="pin">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<Button
android:id="#+id/idFragBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="304dp"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
My Fragment Java File..
package com.turbo.ashish.hexon.BottomNavFragment;
import android.net.Uri;
import android.os.Bundle;
import android.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import com.turbo.ashish.hexon.R;
import static android.widget.Toast.LENGTH_LONG;
public class ProfileFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
Log.d("Working","Wasd");
View fragView = inflater.inflate(R.layout.fragment_profile,container,false);
fragView.findViewById(R.id.idFragBtn).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Toast.makeText(getActivity(),"asd",Toast.LENGTH_LONG).show();
}
});
return fragView;
}
}
But Collapsing bar layout always stay constant in Fragment, i want to make this collapsingbar working on fragment (ProfileFragment)..
My Platform activity where i load fragments like:
private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
#SuppressLint("ResourceType")
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
android.app.FragmentTransaction ft = getFragmentManager().beginTransaction();
switch (item.getItemId()){
case R.id.idNavContacts:
toolbar.setTitle("Contacts");
ft.replace(R.id.idFrameContainer, new ContactsFragment(), "Contacts Ftagment").commit();
return true;
case R.id.idNavPerson:
toolbar.setTitle("Profile");
ft.replace(R.id.idFrameContainer,new ProfileFragment(), "Profile Fragment").commit();
return true;
case R.id.idNavGroups:
toolbar.setTitle("Groups");
ft.replace(R.id.idFrameContainer,new GroupsFragment(), "Groups Fragment").commit();
return true;
case R.id.idNavFeeds:
toolbar.setTitle("Feeds");
ft.replace(R.id.idFrameContainer, new FeedskFragment(), "Feeds Fragment").commit();
return true;
}
return false;
}
};
There is no problem in loading fragment but the Collapsing bar not responds (No sliding), i want to happen in fragment.
Activity 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"
tools:context="com.turbo.ashish.hexon.Platform">
<FrameLayout
android:id="#+id/idFrameContainer"
android:layout_width="match_parent"
android:layout_height="454dp">
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/idBottomNav"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="?android:attr/windowBackground"
app:itemBackground="#color/WHITE"
android:foreground="?attr/selectableItemBackground"
app:itemIconTint="#color/deepViolate"
app:itemTextColor="#color/deepViolate"
app:menu="#menu/navigation">
</android.support.design.widget.BottomNavigationView>
</android.support.design.widget.CoordinatorLayout>

Why my Collapsing Toolbar Layout not working ?
You expect your collapsing toolbar to work in Constraint Layout ?
Firstly, to make the collapsing toolbar work make
android.support.design.widget.CoordinatorLayout
as your root layout.

make changes in xml file used below code instand of android.support.constraint.ConstraintLayout into room xml tag ..
<android.support.design.widget.CoordinatorLayout>

Layout issue with Viewpages in Android

i work with viewpages i have 3 and i got this in every page.
i dont find the error to get this output]2
there ist a white stripe at the top and buttom. i dont find anything to fix it. here is my code:
and the story.java:
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
public class Story1Fragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_story1, container, false);
Button _play = (Button) rootView.findViewById(R.id.btn_play);
_play.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
}
});
return rootView;
}
}
the main layout:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="com.jeravare.hypralyne.MainActivity">
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
android:layout_width="368dp"
android:layout_height="495dp"
android:layout_marginTop="8dp"
app:layout_constraintTop_toTopOf="parent"
tools:layout_editor_absoluteX="8dp"></android.support.v4.view.ViewPager>
</android.support.constraint.ConstraintLayout>

The problem is not in the fragment layout.
You can change this:
android:layout_width="368dp"
android:layout_height="495dp"
android:layout_marginTop="8dp"
to this:
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="8dp" // you can remove this if you don't need a space at the top

videoview not showing on device nor xml design,

I am new in java and xml programming, i am making tabbed activity with fragment, there is no error when running or debug the code but VideoView is not showing, i am using Android Studio,
the idea is i want to make tabbed activity, with textView and videoview in fragment as a content that scrollable(possible ?),one more thing is the API level somehow have influence ? my phone still on KitKat
here is the (fragment) code :
package com.panduanberwudhu;
import android.net.Uri;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.MediaController;
import android.widget.VideoView;
public class MencuciTangan extends Fragment {
private VideoView player;
private String videopath;
private MediaController mediacon;
public View rootView;
//#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.mencucitangan_layout, container, false);
mediacon = new MediaController(getActivity());
player = (VideoView) rootView.findViewById(R.id.videoplayer);
videopath = "android.resource://" + getActivity().getPackageName() + "/" + R.raw.washhand;
player.setVideoURI(Uri.parse(videopath));
player.setMediaController(mediacon);
mediacon.setAnchorView(player);
player.start();
return rootView;
//return inflater.inflate(R.layout.mencucitangan_layout,container,false);
}
}
and the layout code :
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/mencucitangan_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.panduanberwudhu.MencuciTangan">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/app_name"
/>
<VideoView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/videoplayer"
android:layout_gravity="bottom"
/>
</LinearLayout>
</ScrollView>

Use this layout, where the height Relativelayout is wrap_content which will increase/wrap according to content because it is inside the ScrollView .
I removed Linearlayout as hard coded some value:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/mencucitangan_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/app_name"
android:id="#+id/ap"
android:textSize="20sp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<VideoView
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_marginTop="50dp"
android:foregroundGravity="center"
android:id="#+id/videoplayer" />
</RelativeLayout>
</ScrollView>
Output:

Removal of override, not able to view fragment b

I'm going through this "Beginning Android Development" book. I get to the Fragments section and I follow the code as show, but my compiler gives me an error.
MainActivity.java
package com.example.fragmentsdemo;
import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class MainActivity extends Activity {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle saveInstanceState){
View view = inflater.inflate(R.layout.my_frag, null, false);
return view;
}
}
The error begins at "public view" and states "The method ... of type MainActivity.java must override or implement a supertype method
The two XML files are below for completion...
activity_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"
tools:context=".MainActivity" >
<fragment
android:id="#+id/fragment1"
android:name="com.example.fragmentsdemo.MyFragment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
tools:layout="#layout/my_frag" />
</RelativeLayout>
my_frag.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World from Fragment!"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
Now, when I remove #Override it will run, but I do not see the text "Hello World from Fragment!" there. Any suggestions?

The method onCreateView in your parent class Activity accepts the following parameters:
View, String, Context, AttributeSet
String, Context, AttributeSet
It seems you need to extend Fragment instead Activity
Fragment documentation
In your activity_main.xml, in the fragment block, the fragment name should be the name of your Fragment class.