I have a button in my MainActivity that opens FragmentA. FragmentA covers the whole screen, but I still see the button from MainActivity, and I can still click on it.
I've tried using clickable in my fragment layout but it's not working
MainActivty
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
button.setOnClickListener {
val fragmentManager = this#MainActivity.supportFragmentManager
fragmentManager.beginTransaction()
.add(R.id.fragment_container, AFragment())
.addToBackStack(null)
.commit()
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
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"
tools:context=".MainActivity"
android:id="#+id/fragment_container">
<Button
android:text="Button Main"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/button" app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent" app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"/>
</android.support.constraint.ConstraintLayout>
fragment_a.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:clickable="true"
android:focusable="true">
android:background="#color/colorPrimary"
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="A"/>
</LinearLayout>
This is happening because you placed your Button inside of the ConstraintLayout you're using as the container of your Fragment.
When you add a fragment into a container like what you're doing, it's simply adding it in the same manner as if it was a View.
Therefore, if you add a Fragment into a ConstraintLayout that already possesses a Button as a child, the Fragment will be shown alongside the Button due to ConstraintLayout allowing for overlapping Views.
This is also why, if your container was a LinearLayout, then adding a Fragment will place the fragment underneath your Button instead.
So, with that in mind, the solution would be to handle it as if they were Views.
If you added a View into a layout and you have another View overlapping, how would you get rid of it?
The most common solution would be to set the Button's visibility to INVISIBLE or GONE when the Fragment is added.
Another solution might be to raise the elevation of the Fragment, so it's now higher than your Button.
Of course, you may also remove the button from the Container and place it inside a Fragment too.
This way, you can use the replace() method in a FragmentManager to replace the Fragment containing your Button with the Fragment you want to show.
Related
I have a navigation drawer using fragments created from the default "Navigation Drawer Activity" template in Android Studio. Inside a fragment A, I want to open another fragment B. So the fragment B must replace fragment A. I saw on google, that I should use FrameLayout to Dynamically change the current displayed fragment.
<FrameLayout
android:id="#+id/nav_host_frame_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="#+id/nav_host_fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navGraph="#navigation/mobile_navigation" />
</FrameLayout>
To change fragment, I am using the code below, when I am clicking on a button in the fragment that I want to be replaced
NewCalendarEvent newEventFrag = new NewCalendarEvent();
getActivity().getSupportFragmentManager().beginTransaction()
.replace(R.id.nav_host_frame_layout, newEventFrag)
.addToBackStack(null)
.commit();
Currently, when I click on the button, the two fragments are show. Is because I am using fragment and frameLayout together ? What I am doing wrong ?
If you are using a NavHostFragment and the Navigation Component, then you never use a FragmentTransaction. Instead you navigate to a screen by using the APIs on NavController.
Hello I'm trying to make an application that has multiple bottomnaviagtion tabs.
Currently it works because fragment data (for example, images) are static. However, if I want to make them dynamic, I'll have to create a preloader.
So I want to display a loading layout (for example R.layout.loading) UNTIL (async) function has completed and obtained data from server. Then I want to replace the layout in the fragment with a new layout (R.layout.datafragment)
Fragment onCreateView:
return inflater.inflate(R.layout.loading, container, false);
In summary it should work exactly like youtube bottom tabs.
You should create in your activity layout a placeholder for those dynamic fragments and a loader which is by default gone, but when you start loading data from the server you should make it visible (loader). Then, when you load necessary data, just start fragment transition and place whatever fragment you have loaded.
Your parent activity's layout should be like this:
<?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">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<!--Navigation View and Fragment Container-->
</RelativeLayout>
<RelativeLayout
android:id="#+id/progress_layout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"/>
</RelativeLayout>
</RelativeLayout>
Then you simply show/hide progressLayout based on your requirement. Thanks
I have a viewPager with infinite loop, but i want to set a border to highlight the current image.
In my main activity i've the adapterPageAdapter and the custom ViewPager (that is clickable).
I think that is easy, but i need help.
Something like this:
Thanks
> Place image view inside another layout set the background color of
> parent layout.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/border"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="1dp">
<ImageView
android:id="#+id/imageViewImage"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:foregroundGravity="center_horizontal"/>
</RelativeLayout>
> inside PagerAdapter instantiateItem method when you are setting bitmap
> to imageView, also set backgroud color to layout.
final RelativeLayout border = (RelativeLayout) view.findViewById(R.id.border);
border.setBackgroundColor(Color.RED);
In AndroidStudio, I selected "New->Fragment->Fragment (List)" to create a list of items. It works fine and displays all the items; however, I would like to have a title at the top.
If I add another TextView to the "fragment_item_list.xml" file, then the title appears in all the items in the list. From other questions I figured that if I create another LinearLayout xml layout file (something like "list_header.xml") and put a TextView in it, I can use a layout inflater to inflate this layout in the fragment activity, e.g. in onCreateView,
View header = inflater.inflate(R.layout.list_header,container,false);
but then I don't know what to do with header to make it display somewhere in the fragment. I can add it to the original activity by calling container.addView(header); but how can I add it to the fragment?
I don't want to change the ActionBar title, firstly just for aesthetics, and secondly because the fragment covers it up. Ideally there would be a header like in an alert dialog.
Let me try to understand you. You want to add a title to your fragment list (like an header), not in the ActionBar. Right?
Looking the fragment_item_list.xml we have this: (I follow your steps: "New->Fragment->Fragment (List)")
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.RecyclerView 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/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
app:layoutManager="LinearLayoutManager"
tools:listitem="#layout/fragment_item" />
The RecyclerView is a container used for populate a list, in other words, the RecyclerView (or ListView) contain all the list only. So, you have to add another container (like LinearLayout, RelativeLayout, etc.) as root of the layout to add more views to the layout. Example using the LinearLayout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/text_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hello World! I'm a header!"/>
<android.support.v7.widget.RecyclerView
android:id="#+id/list"
android:name="com.veroapps.myapplication.ItemFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
app:layoutManager="LinearLayoutManager"
tools:listitem="#layout/fragment_item" />
</LinearLayout>
With this you will have a list with a title at the top. Now, you can manage the title TextView in the ItemFragment(name of the fragment generated by Android Studio). And of course there are more ways to do that, but this is an easy one.
Hope this help you.
In your Fragment java class, there should be a method called onCreateView this is where you set the layout for your Fragment (and where the list is added). It will look something like this:
public static class ExampleFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.example_fragment, container, false);
}
}
In this Fragment the layout is inflated by this code inflater.inflate(R.layout.example_fragment, container, false); and this means there's is an xml file defining the layout called example_fragment.xml.
Your code will be the same, when you find this XML file. You can add other views inside it.
You will want to add another TextView above the RecyclerView or ListView already in that file.
Something like this:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<TextView
...
android:text="YOUR TITLE" />
<RecyclerView
... />
</LinearLayout>
According to the following picture:
I want something like this
the ListView is not a NavigationDrawer, it's a part of the Activity.
Items the ListView are columns of a database and when user selected Each of them, on the left side(Activity), other fields of that column should be displayed.
How can I do this?
Try it like this
<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="horizontal">
<LinearLayout
android:layout_width="0"
android:layout_height="match_parent"
android:layout_weight="1">
//Your UI
</LinearLayout>
<LinearLayout
android:layout_width="0"
android:layout_height="match_parent"
android:layout_weight="1">
//Your ListView
</LinearLayout>
</LinearLayout>
So your layout will have fragments one a left fragment and one a right one
XML
<LinearLayout
orientation:horizontal>
<FrameLayout
id=leftFragment
weight=1/>
<FrameLayout
id=rightFragment
weight=1/>
</LinearLayout>
Java Code
FragmentManager fm=getFragmentManager();
fm.replace(R.id.leftFragment,new LeftFragment());
fm.commit();
Similarly for Right Fragment
You should use a LinearLayout with Horizontal orientation, then have two layout, one for the left side of the screen and one for the right side of the screen (with your ListView). Then you should use the layout_weight attribute for each layout by declaring like 0.7 for the right one (ListView) and 0.3 for the left one, it should looks like your picture