Develop Reference

TextView hiding behind Tabs Layout

I've implemented a tab layout in my app. And have created 3 fragments for each tab. All fragments contain a single TextView and it is a child of NestedScrollView. Everything works as expected until the string passed to the TextView is large enough and needs to be scrolled for viewing it completely. At that time, the text inside TextView hides behind the tabs.
I've tried the answers provided here: Fragment from View Pager hiding behind Tab Bar
to no avail.
Here's my code:
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.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=".PrayerActivity">
<androidx.viewpager.widget.ViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/Theme.BuddhaPoojapathMarathi.AppBarOverlay">
<!--<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:minHeight="?actionBarSize"
android:padding="#dimen/appbar_padding"
android:text="#string/app_name"
android:textAppearance="#style/TextAppearance.Widget.AppCompat.Toolbar.Title" />-->
<com.google.android.material.tabs.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary" />
</com.google.android.material.appbar.AppBarLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
And here's one of the fragments:
<?xml version="1.0" encoding="utf-8"?>
<androidx.core.widget.NestedScrollView 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"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".Fragment_1">
<TextView
android:id="#+id/frag1_tv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="#dimen/text_margin"
android:textSize="#dimen/text_medium"
android:layout_gravity="center"
android:textAlignment="center"
android:textColor="#color/black"
android:paddingTop="48dp"
android:text="#string/buddha_vandana_mar" />
</androidx.core.widget.NestedScrollView>
As seen in the image the first part of the text is hiding behind the tabs.
Update:
PrayerActivity.java
public class PrayerActivity extends AppCompatActivity {
private ActivityPrayerBinding binding;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
int num = getIntent().getIntExtra("num", 0);
Bundle bundle = new Bundle();
bundle.putInt("num", num);
Log.d("myInt", String.valueOf(num));
binding = ActivityPrayerBinding.inflate(getLayoutInflater());
setContentView(binding.getRoot());
SectionsPagerAdapter sectionsPagerAdapter = new SectionsPagerAdapter(this, getSupportFragmentManager(), num);
ViewPager viewPager = binding.viewPager;
viewPager.setAdapter(sectionsPagerAdapter);
TabLayout tabs = binding.tabs;
tabs.setupWithViewPager(viewPager);
}
}

I would suggest you to use RelativeLayout instead CoordinatorLayout. First, Change the layout to RelativeLayout. Second, add attribute id to the AppBarLayout. Last, add attribute layout_below to ViewPager. You can see at below. I did not test the code.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
tools:context=".PrayerActivity">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/Theme.BuddhaPoojapathMarathi.AppBarOverlay">
<!--<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:minHeight="?actionBarSize"
android:padding="#dimen/appbar_padding"
android:text="#string/app_name"
android:textAppearance="#style/TextAppearance.Widget.AppCompat.Toolbar.Title" />-->
<com.google.android.material.tabs.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary" />
</com.google.android.material.appbar.AppBarLayout>
<androidx.viewpager.widget.ViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</LinearLayout>

just put this line in NestedScrollView
android:fillViewport="true"

Please use below code.
<LinearLayout 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:orientation="vertical"
tools:context=".activity.MainActivity">
<RelativeLayout
android:layout_width="match_parent"
android:background="#color/black"
android:layout_gravity="center"
android:layout_height="#dimen/_40sdp">
<ImageView
android:id="#+id/back_btn"
android:layout_width="#dimen/_26sdp"
android:layout_height="#dimen/_26sdp"
android:layout_marginTop="#dimen/_5sdp"
android:layout_marginLeft="#dimen/_8sdp"
android:src="#drawable/back_arrow"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#color/white"
android:layout_toRightOf="#+id/back_btn"
android:layout_marginLeft="#dimen/_10sdp"
android:padding="#dimen/_8sdp"
android:text="#string/my_listing_text"
android:textSize="#dimen/_14sdp"/>
</RelativeLayout>
<View
android:layout_width="match_parent"
android:layout_height="#dimen/_1sdp"
android:background="#color/dark_gray"/>
<com.google.android.material.tabs.TabLayout
android:id="#+id/tablayout"
android:layout_width="match_parent"
android:layout_height="#dimen/_40sdp"
android:background="#color/black"
app:tabIndicatorColor="#color/white"/>
<androidx.viewpager.widget.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>

Adding items and design on toolbar toolbar

How to add the different type of designs and color to a toolbar and showing the value(value depends on user points) on toolbar gets updated whenever the user goes to another activity.

You can take RelativeLayout inside Toolbar and customize it according to your requirement. Here is sample Code.
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.AppBarLayout 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="wrap_content">
<android.support.v7.widget.Toolbar
android:id="#+id/my_toolbar"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#color/colorPrimary"
app:navigationIcon="#mipmap/ic_launcher_round"
app:titleTextColor="#android:color/white">
<RelativeLayout
android:id="#+id/rl_plane_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="visible">
<ImageView
android:id="#+id/tv_submit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:gravity="center_vertical"
android:src="#mipmap/ic_launcher_round"
android:text="Submit" />
</RelativeLayout>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>

android:animateLayoutChanges="true" not working with toolbar

I'm trying to set visibility of some elements and I'm using the android:animateLayoutChanges="true" to animate this changes, the animation of the Floating Action Button happens ok, but not works with the menu items, they just blink. Here it is my xml and code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:animateLayoutChanges="true"
android:gravity="center">
<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="#dimen/standard_elevation"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Dark"/>
<FrameLayout
android:id="#+id/fl_root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/my_toolbar">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</FrameLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/my_toolbar"
android:id="#+id/rlMainInside"
android:animateLayoutChanges="true">
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/activity_vertical_margin"
android:clickable="true"
android:src="#drawable/ic_create_black_48dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/activity_vertical_margin"
android:src="#drawable/main_center_image"
android:layout_centerInParent="true"/>
</RelativeLayout>
<FrameLayout
android:id="#+id/fl_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/my_toolbar"
android:layout_marginLeft="320dp"/>
</RelativeLayout>
And I use this method to set the visibility of some elements:
private void setMenuVisibility(boolean drawerOpenned) {
Menu menu = myToolbar.getMenu();
for (int i = 0; i < menu.size(); i++){
menu.getItem(i).setVisible(!drawerOpenned);
}
fab.setVisibility(drawerOpenned ? View.INVISIBLE : View.VISIBLE);
}
Can someone help me? I tried to put android:animateLayoutChanges="true" inside the toolbar element, but not happened also.

Is it possible to have both back and menu button in toolbar Android?

In iOS Amazon app, they implemented both back and menu button together. Is it possible to implement the same in Android?

You can create a custom toolbar design in XML as
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:minHeight="?attr/actionBarSize">
<ImageView
android:id="#+id/backButton"
android:background="#drawable/back_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageView
android:id="#+id/homeButton"
android:background="#drawable/menu_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</android.support.v7.widget.Toolbar>
Then set listeners to perform task such as openDrawer and goto previous screen.
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
ImageView homeButton = (ImageView) toolbar.findViewById(R.id.homeButton);
homeButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
drawerLayout.openDrawer(GravityCompat.START);
}
});

you can create a Toolbar with custom layout like this:
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/main_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?attr/actionBarSize">
<ImageView
android:id="#+id/backButton"
android:background="#drawable/ic_back_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageView
android:id="#+id/hamburgerButton"
android:background="#drawable/ic_home_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageView
android:id="#+id/logo"
android:background="#drawable/logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</android.support.v7.widget.Toolbar>

If you want something special create it by your own :)
If you're using latest design library its possible to create your custom toolbar panel and add any item you want there.
I was achieving that behaviour this way:
main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<!-- this is top bar where you need to add both drawer toggle and back button-->
<include
layout="#layout/app_bar_navigation"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- Content of sliding menu-->
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="end"
android:background="#color/primary_blue_dark"
android:fitsSystemWindows="true">
<!-- Custom menu list. Feel free to customize it as listview-->
<ListView
android:id="#+id/lv_menu"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.design.widget.NavigationView>
layout/app_bar_navigation.xml
<?xml version="1.0" encoding="utf-8"?>
<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:fitsSystemWindows="true"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="#dimen/nav_header_size_pre5"
android:background="#color/primary_blue_dark"
android:padding="6dp">
<!-- This is where you need to place those items. I had title and imageview there. You may add anything-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:layout_centerHorizontal="true"
android:gravity="center">
<ImageView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:src="#drawable/ic_logo"
android:adjustViewBounds="true"/>
<TextView
android:id="#+id/tv_app_logo"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="#string/app_name"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:textColor="#color/primary_yellow"
android:textSize="#dimen/middle_text"
android:gravity="center"/>
</LinearLayout>
<ImageView
android:id="#+id/iv_drawer_open"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:src="#drawable/ic_drawer_toggle"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:tint="#color/primary_white"/>
</RelativeLayout>
<!-- This is main content-->
<include layout="#layout/content_navigation" />

Yes absolutely possible you just have to hide the default toolbar by doing following in your Styles.xml :
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
Then you have to create youe own xml file of toolbar let's name it custom_toolbar.xml
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp">
<ImageView
android:id="#+id/back_button"
android:background="#drawable/back_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageView
android:id="#+id/menu_button"
android:background="#drawable/menu_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/toolbar_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginRight="10dp"
android:textColor="#android:color/black"
android:textSize="#dimen/actionbar_textsize"
android:textStyle="bold" />
</android.support.v7.widget.Toolbar>
Then you have to add that toolbar in your activity add toolbar like below
<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="betasoft.com.blankblank.ui.ui.activity.SignUp">
<include
android:id="#+id/toolbar"
layout="#layout/custom_toolbar" />
<FrameLayout
android:id="#+id/main_data"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/toolbar />
</RelativeLayout>
then you can access the toolbar in your activity like :
Toolbar mToolBar;
ImageView mToolBarBack,mToolBarMenu;
TextView mToolBarTitle;
//Inside onCreate
mToolBar = (Toolbar) findViewById(R.id.toolbar);
mToolBarBack = (ImageView) mToolBar.findViewById(R.id.toolbar_back);
mToolBarTitle = (TextView) mToolBar.findViewById(R.id.toolbar_title);
mToolBarMenu= (TextView) mToolBar.findViewById(R.id.menu_button);
// then create a public method so like below so that you can access the toolbar content at any fragment
public void setActionBarTitle(String title) {
mToolBarTitle.setText(title);
}

Using Floating Action Button With Tabs

I am using floating action button with slidingtablayout, but when i use fab in fragments every tab will have its own fab, and transition looks bad like this video from google design
http://material-design.storage.googleapis.com/publish/material_v_4/material_ext_publish/0B6Okdz75tqQsNVRkV3FZMktvMWc/components-buttons-fab-behavior_06_xhdpi_009.webm
When i use fab in the viewpager it shrinks fragments like in the link
https://drive.google.com/file/d/0By6vpKpg_w4tcEJQUUlRazd0VEk/view?usp=sharing
Here is my code activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<com.smooth.www.smooth.SlidingTabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="2dp"
android:background="#color/ColorPrimary"/>
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_weight="1"
/>
</LinearLayout>
and one of my tabs
<android.support.design.widget.CoordinatorLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#f0f0f0"
>
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/tab_main_swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<android.support.v7.widget.RecyclerView
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="#+id/main_recycler"
/>
</android.support.v4.widget.SwipeRefreshLayout>
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:fabSize="normal"
android:id="#+id/main_fab"
android:layout_gravity="bottom|right"
android:layout_margin="16dp"
android:transitionName="#string/fab_transition_name"
android:src="#drawable/fab_image"
app:layout_anchor="#id/main_recycler"
app:layout_anchorGravity="bottom|right|end"
/>
</android.support.design.widget.CoordinatorLayout>
what can i do to for transitions to look good??

Looks like you ar using a LinearLayout or something, instead of RelativeLayout. Can you post code snippets?