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POsetRetainInstance(true); doing it wrong?
 

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    <p>I think an illustration of what happens in my app is best for this question.</p> <p>After the user logs in they are brought to the MainActivity. This contains an <code>ActionBar</code> with tabs, by default one tab is selected and the user sees....</p> <pre><code> container1 container2 CompanyName: &lt;EditText&gt; | | ProjectName: &lt;EditText&gt; | Welcome | &lt;SearchButton&gt; | | </code></pre> <p>When the user fills out those forms and clicks the search button they see...</p> <pre><code> container1 container2 &lt;ListView&gt; | | BasicInfo | Welcome | Assessment | | Signature | | </code></pre> <p>When the user clicks "Assesment" they see</p> <pre><code> container1 container2 &lt;ListView&gt; | Question#1 | BasicInfo | Question#2 | Assessment | Question#3 | Signature | Question#4 | </code></pre> <p>Now when the Assessment <code>fragment</code> inflates it performs an <code>AsyncTask</code> and creates the <code>Views</code> for the questions from <code>JSON</code>. Now when the user is on this screen I do not want a screen orientation change to perform the network request and <code>AsyncTask</code> again. So I put the <code>setRetainInstance(true);</code> in the Assessment <code>Fragment</code> like this</p> <pre><code>public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { view = inflater.inflate(R.layout.fragment_assessment, container, false); ab = getActivity().getActionBar(); infoList = new ArrayList&lt;HashMap&lt;String, String&gt;&gt;(); allRadio = new ArrayList&lt;RadioGroup&gt;(); allImageButton = new ArrayList&lt;ImageButton&gt;(); allSpinner = new ArrayList&lt;Spinner&gt;(); allEdit = new ArrayList&lt;EditText&gt;(); allCheck = new ArrayList&lt;CheckBox&gt;(); new Load().execute(); setRetainInstance(true); return view; } </code></pre> <p>Yet when I flip my screen in the Assessment <code>Fragment</code> not only does it not save the layout it returns me to the parent <code>Activity</code> that looks like this</p> <pre><code> container1 container2 CompanyName: &lt;EditText&gt; | | ProjectName: &lt;EditText&gt; | Welcome | &lt;SearchButton&gt; | | </code></pre> <p>Not sure what I'm doing wrong. It could be my <code>fragment</code> in <code>XML</code> is named incorrectly or maybe the containers are named incorrectly. Here is there code.</p> <p><strong>Container XML</strong></p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/MainLayout" android:layout_width="match_parent" android:layout_height="match_parent" android:baselineAligned="false" android:orientation="horizontal" &gt; &lt;LinearLayout android:id="@+id/header_fragment_container" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1.2" android:background="@drawable/green_gradient" android:orientation="vertical" &gt; &lt;/LinearLayout&gt; &lt;LinearLayout android:id="@+id/content_fragment_container" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="2" android:background="@drawable/twoglobe_line" android:orientation="vertical" android:scrollbars="vertical" &gt; &lt;/LinearLayout&gt; &lt;/LinearLayout&gt; </code></pre> <p><strong>Assessment Fragment XML</strong></p> <pre><code>&lt;ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/basic_info_scroll" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/twoglobe_line" android:gravity="center" android:orientation="vertical" &gt; &lt;LinearLayout android:id="@+id/gen_layout" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="15dp" android:layout_marginRight="15dp" android:layout_marginTop="10dp" android:gravity="center" android:orientation="vertical" &gt; &lt;LinearLayout android:id="@+id/add" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="5dp" android:layout_marginRight="5dp" android:layout_marginTop="10dp" android:orientation="vertical" &gt; &lt;/LinearLayout&gt; &lt;/LinearLayout&gt; &lt;/ScrollView&gt; </code></pre> <p>So am I expecting an unrealistic outcome from the line <code>setRetainInstance(true);</code> or am I just doing it wrong? Any help is appreciated.</p>
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    1. CO*not only does it not save the layout* - you can't save views across a configuration change, that's a sure way to have a memory leak. *it returns me to the parent Activity that looks like this* probably because you don't save somehow the new state of the fragment(I'm assuming that you change the same fragment). Regarding `setRetainInstance()` you could make a small test and see which of the callbacks get called:)
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    2. CO@Luksprog so in other words you would say I **am** doing this wrong and my expectations **are** unrealistic?
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    3. COActually, setRetainInstance does retain the layout and all the values of the fragment. Check documentation here http://developer.android.com/reference/android/app/Fragment.html#setRetainInstance(boolean) . Now, you can make that work, but requires a little more work on the activity side.
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