Develop Reference

Android adding Fragment inside Fragment

Hi there (and thanks in advance),
I have an application with a Google Play Store-like layout (using PagerTabStrip with 5 sub fragments). In some of those fragments I will need to display a little info regarding the last time the data was updated.
I immediately thought of creating a fragment (LastUpdatedFragment) which I would then add (nest) to the fragments I needed. At first, and since the last updated date was supposed to be the same for every screen, things were working (I simply added the fragment in the xml of the parent Fragments I needed and inside onCreateView I would put the date in the TextView), but after some changes I now need to send a specific date for each one of these LastUpdatedFragment instances.
I came up with one way - creating new custom attributes for my Fragment and then I would set the date I wanted. After some reading I stumbled across a easier way (Fragments within Fragments - dinamically adding the fragment using FragmentManager) - I simply needed the parent Fragment to handle the input parameters and pass it to the child fragment.
The problem is that, although I get no errors I also get no child fragment, it just does not display. I would be grateful if you could guide me in the right direction.
ScoreBoardFragment.java -> Parent Fragment
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_scoreboard, container,
false);
for (int i = 0; i < tvCount; i++) {
tvName = "f_scoreboard_header_tv" + String.valueOf(i);
resID = getResources().getIdentifier(tvName, "id",
_activity.getPackageName());
header = (TextView) rootView.findViewById(resID);
header.setTypeface(MyGlobalConfig.getInstance().getHeadersFont());
}
FragmentManager childFragMan = getChildFragmentManager();
FragmentTransaction childFragTrans = childFragMan.beginTransaction();
LastUpdatedFragment fragB = new LastUpdatedFragment();
childFragTrans.add(R.id.FRAGMENT_PLACEHOLDER, fragB);
childFragTrans.addToBackStack("B");
childFragTrans.commit();
return rootView;
}
fragment_scoreboard.xml (simplified but displaying everything else)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/FRAGMENT_PLACEHOLDER"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
style="#style/ListView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/f_scoreboard_header_tv0"
style="#style/ListViewRowHeader"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#" />
</LinearLayout>
<ListView
android:id="#+id/f_scoreboard_lvbody"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerHorizontal="true" >
</ListView>
</LinearLayout>
LastUpdatedFragment.java -> Child Fragment
public class LastUpdatedFragment extends Fragment{
private View rootView;
private TextView tv;
private Context ctx;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Thread.setDefaultUncaughtExceptionHandler(new ExceptionHandler(
getActivity()));
this.ctx = getActivity().getApplicationContext();
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_date, container,
false);
tv = (TextView) rootView.findViewById(R.id.f_date_tv);
tv.setTypeface(MyGlobalConfig.getInstance().getBodyFont());
tv.setText(getString(R.string.lastupdated) + ": " + Util.getLastUpdated(ctx));
return rootView;
}
}
fragment_date.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="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/f_date_tv"
style="#style/LastUpdatedTV"
android:layout_width="match_parent"
android:text="Data de última actualização: 27/12/2014 21:30" />
</LinearLayout>

Try to use FrameLayout instead of LinearLayout as Placeholder.

Adding Layout to a ViewGroup Android

I have a flying in menu which based on ViewGroup.
I want that there will be a basic layout and in any activity i would be able to insert to the view group new layout and afterwards to erase it.
But it doesn't work!!! Can you help me please.
class:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.root = (FlyOutContainer) this.getLayoutInflater().inflate(R.layout.activity_main, null);
this.setAdditionalLayout(findViewById(R.id.physical_layout));
this.setContentView(root);
}
ViewGroup:
<com.nurielweizmann.calculator.view.viewgroup.FlyOutContainer xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#444488"
android:orientation="vertical"
android:id="#+id/menu">
............
</RelativeLayout>
</com.nurielweizmann.calculator.view.viewgroup.FlyOutContainer>
Function:
FlyOutContainer root;
public void setAdditionalLayout(View view){
root.addView(view,1);
}
Thanks in Advance

Try overriding the setContentView(int) instead of the onCreate(Bundle).
Make sure your base layout XML has a ViewGroup (FrameLayout, for example) available to put each Activity's content.
When overriding the setContentView(int), inflate your base layout first then inflate the Activity's layout and place the Activity's layout on the FrameLayout available.

Child Layout visibility gone on another child layout click event

My parent Linearlayout1 contains two child Frame Layouts: FrameLayout1 and FrameLayout2.
The FrameLayout1 is on top of FrameLayout2 but only covers the half of FrameLayout2.
I replaced FrameLayout1 with some fragment1 and also replaced FrameLayout2 with some fragment2.
Now, when I click on FrameLayout2, the FrameLayout1 should get Invisible. But this is not happening.
I tried the following to do so:
userDetails.java
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
view = inflater.inflate(R.layout.userDetails, container, false);
topLayout = (LinearLayout) getActivity().findViewById(R.id.FrameLayout1);
bottomLayout = (LinearLayout) getActivity().findViewById(R.id.FrameLayout2);
view.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v)
{
topLayout.setVisibility(View.GONE);
}
});
}
I also found that onClick listener of view is not getting called on its click.
UPDATE:
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/FrameLayout1"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="match_parent" />
<LinearLayout
android:id="#+id/FrameLayout2"
android:layout_weight="2"
android:layout_width="0dp"
android:layout_height="match_parent" />
</FrameLayout>

You've set OnClickListener to whole View instead of bottomLayout. and I think you can't cast FrameLayout to LinearLayout. The following code works fine here.
final FrameLayout topLayout = (FrameLayout) findViewById(R.id.FrameLayout1);
final FrameLayout bottomLayout = (FrameLayout) findViewById(R.id.FrameLayout2);
bottomLayout.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v)
{
topLayout.setVisibility(View.GONE);
}
});

I think that you have to add to your FrameLayout2 clickable. Try adding
android:clickable="true"
Then in your code setOnClickListener in your FrameLayout2. Btw I think you should cast your topLayout and your bottomLayout as FrameLayout instead of LinearLayout.
Note that your framelayouts should be final in order to be accessed by the listener class.
Hope it helps :)

Android "The specified child already has a parent." for Fragments onCreateView()?

I'm using SherlockFragments in my Android application using the compatibility package. Getting this error for fragments. FATAL EXCEPTION: main
java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. I am adding these fragments as tabs in actionbar sherlock. After run the app successfully when i am switching tabs first time it's working fine, in second time it's giving the above error in onCreateView()..
this is the code in onCreate()
private static final String AD_UNIT_STANDARD_BANNER = "/6253334/dfp_example_ad/banner";
private DfpAdView adView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
adView = new DfpAdView(getActivity(), AdSize.BANNER, AD_UNIT_STANDARD_BANNER);
adView.setAdListener(this);
}
this is the code i am using in fragment onCreateView().
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_chats, container, false);
listview = (ListView) view.findViewById(android.R.id.list);
RelativeLayout layout = (RelativeLayout) view.findViewById(R.id.chats_inner_layout);
adView.setId(111);
adView.loadAd(new AdRequest());
RelativeLayout.LayoutParams add_lp = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
add_lp.addRule(RelativeLayout.BELOW, adView.getId());
listview.setLayoutParams(add_lp);
//**** this is the line causing for error****/////
layout.addView(adView);
return view;
}
this is the xml code for above fragment
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/chats_main_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/app_lite_theme"
android:orientation="vertical" >
<RelativeLayout
android:id="#+id/chats_inner_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:scrollbars="none" />
</RelativeLayout>
</RelativeLayout>
this same code i am using for fragments that is working fine without any problems. i am facing problem with fragments only. What is the problem here ? anybody tell
me solution for this.

I think somethings wrong in this part
listview.setLayoutParams(add_lp);
it should be
addView.setLayoutParams(add_lp);

Add static header to listFragment in onCreateView

How can I add a simple static header to my listview inside a listFragment? I want to create the header from an xml def and add it through inflation.
My onCreateView:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View detailList = inflater.inflate(R.layout.detail_fragment, container, false);
View detailListHeader = inflater.inflate(R.layout.daily_sales_header, null, false);
container.addView(detailListHeader, 0);
return detailList;
}
This creates the header, but it is not above the listview, rather the listview appears underneath the header, ie the header is overlaying the listview.
Any hints on the correct implementation?

Putting hackbod's description into code for you since his answer created more questions before the answers came. Sometimes I just want the fish. I don't always need to know how the net is made...
To start with, create a layout that looks like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/myListViewWithHeader"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="6dp"
android:textStyle="bold"
android:textSize="20sp" />
<ListView
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:drawSelectorOnTop="false" />
<TextView
android:id="#android:id/empty"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
Then, in your onCreateView method you do this:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.myListViewWithHeader, null);
return view;
}
The header can now be populated by doing this:
// get the header view
TextView headerView = (TextView) getView().findViewById(R.id.header);
headerView.setText("Header text goes here");
Notice that my header is a TextView, but it can be replaced with another view if you like. In that case you will need to do a getView().findViewById(R.id.xxxxx) for each view inside the header you want to work with

You should NEVER EVER be adding views directly to the container in onCreateView(). Please read the documentation: http://developer.android.com/reference/android/app/Fragment.html#onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle)
Also see the various sample code in the Fragment documentation, as well as the API demos: http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/app/index.html
There is nothing special about using a Fragment here. Just build a view hierarchy containing a ListView like you normally would in an Activity or elsewhere. You always need to return one View from onCreateView; this is the root of your hierarchy.
For example you could make the ListView and then use this to add a header to it: http://developer.android.com/reference/android/widget/ListView.html#addHeaderView(android.view.View)