How can I have my BottomNavigationView in several activities but without declaring it there?
i declared my Bottom navigation view in my main_activity.xml and handle the click logic within MainActivity class, but since I want to switch between 3 activities (Map, Friends, Chats) with the Bottomnavigationview i'd have to have 3 bottom navigation views over three activities, but since that's performance inefficient, I want to handle all the click events and initialisation of the view inside one class and one Layout
(MainActivity class and main_activity.xml ).
What can I do? or is there a better way of doing this?
You should use fragments instead of activities. Have only 1 activity ie MainActivity, add BottomNavigationView and fragments above the BottomNavigationView. And on clicking the BottomNavigationView, replace the fragments.
Your XML would be something like,
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<View
android:id="#+id/bottom_nav_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"/>
<FrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_above="#id/bottom_nav_view"></FrameLayout>
From your activity, add fragments in FrameLayout. Your BottomNavigationView will remain intact. Just replace fragments in this FrameLayout on clicking NavigationView tabs.
Related
I have an app, that has a few fragments in it. I'm using ViewPager 2 to swipe between them.
Lately I've added Navigation component to make a way to get into one specific fragment that is not avilable for user just by swipe.
I've found out, that whever I place FragmentContainerView over the ViewPager2 in my MainActivity layout, I can go to this unvailable fragment, but I can't swipe. Same thing whener I switch FragmentContainerView with ViewPager2. Is there any way to make them both work at the same time?
Here's my layout
<?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"
tools:context=".MainActivity"
android:orientation="vertical">
<androidx.fragment.app.FragmentContainerView
android:id="#+id/fragmentContainerView"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:navGraph="#navigation/nav_graph" />
<androidx.viewpager2.widget.ViewPager2
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
They can work together but not like this, at least not for what you want.
Navigation component is made to handle traveling between destinations. ViewPager2 is a widget to be used in a destination, not for traveling between them.
For what you are describing you will need to have FragmentA that will contain ViewPager2 where all of the swiping will take place and handling of fragments (let's say Fragment1, Fragment2, Fragment3) in the ViewPager2.
Those fragments will have nothing to do with the Navigation component.
Navigation component will come to play when you will want to go from FragmentA to FragmentB.
I am new to android and I am going to design this kind of layout that is complex to me. Here's the code of main_activity.xml file:
<?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_layout_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<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=".MainActivity">
<android.support.v4.view.ViewPager
android:id="#+id/home_view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<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.TabLayout
android:id="#+id/tab_layout_home"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.design.widget.AppBarLayout>
</android.support.design.widget.CoordinatorLayout>
<android.support.design.widget.NavigationView
android:id="#+id/navigation_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:layout_gravity="start"
app:headerLayout="#layout/nav_header"
app:menu="#menu/menu_drawer"/>
</android.support.v4.widget.DrawerLayout>
Basically I have in my main activity a Navigation drawer and 3 tabs. Here's a picture:
Everything works as I want and I'm happy.
When I click on a navigation drawer item I start a new intent to open a new activity and it's good but the drawer disappears of course (becase the new activity does NOT have the drawer). I want to keep the drawer in the screen always.
To keep the drawer on my screen I thought that I could have placed the TabLayout of the above XML as a fragment; in this way the drawer would still be there. But how can I do this? How can I place the TabLayout in a fragment so that I can replace this fragment with TabLayout or other fragments?
I think that I could put a FrameLayout instead of TabLayout but I do not know if it's good idea and how would it work. Any help?
There are similar questions like this but they haven't helped me because I'm still stuck here
More. If you click on results, the ThisSeason activity is launched and it has some fragments inside (inclusing ResultsFragments). That works, but there is no navigation drawe anymore and I have to press the back button!
I'll give you a general idea for implementing this.
Make a base activity for your application.
Then make fragment for each activity including the screen which has tabs. So, if you have 5 items in nav view then total of 6 fragments will be created.
Add the nav view and related functions in the main activity xml and java file. This will basically add navigation view to the base activity and since you're using fragments, all the pages(fragments) will have the navigation view.
Additional Note: You can make multiple subclasses to handle specific functions, like one for handling actionMode, navigation view and updating the title in the toolbar. You get the point.
Also, all the features which are common to all the fragments should be added in the base activity only instead of repeating the same code everywhere.
I am looking for a way to run activity and fragment at the same time where activity will show two buttons to transition from one activity to the other whereas fragment will show live camera view in the background.
is it possible?
Fragments are the part of activity. So it's obvious that activity and fragment run simultaneously run. Fragment does not have it's own context. After read your question I think you want that you can change the fragments but buttom buttom are place there for all fragment. You can do this like:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/container"
android:layout_above="#+id/button"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:id="#+id/button"/>
</RelativeLayout>
add and replace your fragment on framelayout so each fragment have the button at bottom which is the part of activity.
I'm using android navigation drawer menu. I want to show navigation drawer in my all activities class. If i want to use it what i need to do actually. If anyone give tips it'll very helpful.
Make a BaseActivity Activity, which will be extended by every other Activity.
The layout of the BaseActivity will be a DrawerLayout, that contains a FrameLayout and the Navigation Drawer. It will look something like this (In this case, the Navigation Drawer is a RecyclerView) -
<?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_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Content-->
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/base_frame"/>
<!-- Side navigation drawer UI -->
<android.support.v7.widget.RecyclerView
android:id="#+id/nav_drawer_rv"
android:layout_width="280dp"
android:layout_height="match_parent"
android:layout_gravity="end"
android:dividerHeight="0dp" />
</android.support.v4.widget.DrawerLayout>
Make the FrameLayout a protected class field, and in every Activity that extends the BaseActivity, inflate the layout as such -
getLayoutInflater().inflate(R.layout.your_activity, baseFrameLayout);
Make the BaseActivity handle all interactions with the Navigation Drawer (selecting items, switching Activities, etc...).
I currently have 1 activity that jas 2 fragments top half and botton half. I want to swipe the bottom fragment only. (java implented)
Before i go learning the wrong method could someone please tell me which method I should use.
Do you sill use pageView and a fragment adapter or something.
Any usefull tutorials that do similar would be good so i can figure it out.
Define fragment and viewpager in the same activity. in the fragment show thetop fragment and in viewpager, write one pager adapter and invoke all the child fragments into that pager. This solves your problem.
Your activity layout:
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<space
android:id="#+id/layout"
android:layout_width="match_parent"
center_horizontal="true"
center_vertical="true"
android:layout_height="0.5dp">
<fragment
android:id="#+id/layout"
android:layout_width="match_parent"
layout_above="#id/space_layout"
android:layout_height="match_parent"/>
<android.support.v7.widget.viewpager
android:id="#+id/layout"
android:layout_width="match_parent"
layout_below="#id/space_layout"
android:layout_height="match_parent">
Then define PagerAdapter class and show all your child fragments in that.
all the best