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POInflate Exception when Switching Between Orientations and Having Dynamic Non UI Fragments and Separate Layout Files
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  1. POInflate Exception when Switching Between Orientations and Having Dynamic Non UI Fragments and Separate Layout Files
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    copied!<p>I have been looking at this and trying to figure the problem out for a day now, but with no luck. I usually ask questions as a final measure, so I am kind of desperate right now as nothing that was recommended in other questions worked for me... And I've been trying hundreds of solutions. It could be that I am just having problems figuring out the correct way of asking it.</p> <p>Here is what I have in my project:</p> <p><strong>A base fragment activity class that all activities in my project extend:</strong></p> <pre><code>public abstract class BaseFragmentActivity extends SherlockFragmentActivity implements IActivity { protected CacheFragment cacheFragment; /* * (non-Javadoc) * * @see * com.actionbarsherlock.app.SherlockActivity#onOptionsItemSelected(com. * actionbarsherlock.view.MenuItem) */ @Override public boolean onOptionsItemSelected(final MenuItem item) { NavigationHandler.switchToActivity(this, item.getItemId()); return true; } /* * (non-Javadoc) * * @see android.app.Activity#onCreate(android.os.Bundle) */ @Override protected void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.getSupportActionBar().setHomeButtonEnabled(this.isHomeButtonEnabled()); this.getSupportActionBar().setDisplayHomeAsUpEnabled(this.isHomeDisplayedAsUp()); } /** * Returns whether the home button is enabled. * * @return &lt;code&gt;TRUE&lt;/code&gt; if the home button is enabled. */ public abstract boolean isHomeButtonEnabled(); /** * Returns whether the home button should be displayed as an up button with * a arrow on the left. * * @return &lt;code&gt;TRUE&lt;/code&gt; if the home button should be shown with an * arrow. */ public abstract boolean isHomeDisplayedAsUp(); /** * Gets the cache manager of the given fragment activity. */ public CacheManager getCacheManager() { if (this.cacheFragment == null) { this.cacheFragment = CacheFragment.getOrCreateCacheFragment(this.getSupportFragmentManager(), this); } return this.cacheFragment.getCacheManager(); } /* * (non-Javadoc) * * @see com.actionbarsherlock.app.SherlockFragmentActivity#onPause() */ @Override protected void onPause() { super.onPause(); if (this.cacheFragment != null) { this.cacheFragment.getCacheManager().flushDiskCache(); } } } </code></pre> <p><strong>A home activity with two different layouts for portrait (in layout-port) and landscape, which extends the base activity class:</strong></p> <p>Portrait:</p> <pre><code>&lt;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" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".HomeActivity" &gt; &lt;fragment android:id="@+id/teaserFragment" android:layout_width="match_parent" android:layout_height="wrap_content" class="com.nikolov.ivan.android.metalafisha.fragments.TeaserListFragment" &gt; &lt;/fragment&gt; &lt;/RelativeLayout&gt; </code></pre> <p>Landscape:</p> <pre><code>&lt;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:baselineAligned="true" android:orientation="horizontal" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".HomeActivity" &gt; &lt;fragment android:id="@+id/teaserFragment" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="2" class="com.nikolov.ivan.android.metalafisha.fragments.TeaserListFragment" &gt; &lt;/fragment&gt; &lt;fragment android:id="@+id/articleFragment" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginLeft="@dimen/article_detail_landscape_margin_left" android:layout_weight="3" class="com.nikolov.ivan.android.metalafisha.fragments.ArticleFragment" &gt; &lt;/fragment&gt; &lt;/LinearLayout&gt; </code></pre> <p><strong>Teaser fragment:</strong></p> <p>Layout:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;ListView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/lvItems" android:layout_width="match_parent" android:layout_height="wrap_content" android:choiceMode="singleChoice" &gt; &lt;/ListView&gt; </code></pre> <p><strong>Article fragment</strong>:</p> <p>Layout:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/scrollArticle" android:layout_width="fill_parent" android:layout_height="wrap_content" &gt; &lt;LinearLayout android:id="@+id/layoutLinear" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical" &gt; &lt;/LinearLayout&gt; &lt;/ScrollView&gt; </code></pre> <p><strong>A cache fragment:</strong></p> <pre><code>public class CacheFragment extends SherlockFragment { private static final String TAG = "CacheFragment"; private CacheManager cacheManager; public CacheFragment() { } /** * Gets the application cache fragment or creates a new one. */ public static CacheFragment getOrCreateCacheFragment(final FragmentManager fm, final Context context) { CacheFragment result = (CacheFragment) fm.findFragmentByTag(CacheFragment.TAG); if (result == null) { result = new CacheFragment(); result.cacheManager = new CacheManager(context); FragmentTransaction ft = fm.beginTransaction(); ft.add(result, CacheFragment.TAG); ft.commit(); } return result; } public CacheManager getCacheManager() { return this.cacheManager; } /* * (non-Javadoc) * * @see * android.support.v4.app.Fragment#onCreateView(android.view.LayoutInflater, * android.view.ViewGroup, android.os.Bundle) */ @Override public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { return null; } /* * (non-Javadoc) * * @see android.support.v4.app.Fragment#onCreate(android.os.Bundle) */ @Override public void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.setRetainInstance(true); } } </code></pre> <p>The idea of the cache fragment is to have no UI and to be used and retained during configuration changes. All disk accesses are done on a thread different than the main one.</p> <p>Here are two scenarios now:</p> <ol> <li>Start the application in landscape mode - everything is fine, things are visualized normally and there are no problems at all when I change the orientation or do whatever with the app.</li> <li>Start the application in portrait mode - the problems come here... When I switch the orientation I am expecting to get the master-detail layout. The activity gets recreated and should use the landscape layout, the <strong>CacheFragment</strong> should be there, since it was created to retain its instance and this seems to be the case. I see the call to the <strong>onCreateView</strong> of the first layout fragment (<strong>TeaserListFragment</strong>) and then I get the following exception:</li> </ol> <p>LogCat:</p> <pre><code>09-08 15:41:37.104: E/AndroidRuntime(1731): FATAL EXCEPTION: main 09-08 15:41:37.104: E/AndroidRuntime(1731): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nikolov.ivan.android.metalafisha/com.nikolov.ivan.android.metalafisha.HomeActivity}: android.view.InflateException: Binary XML file line #21: Error inflating class fragment 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3815) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.app.ActivityThread.access$2400(ActivityThread.java:125) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2037) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.os.Handler.dispatchMessage(Handler.java:99) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.os.Looper.loop(Looper.java:123) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.app.ActivityThread.main(ActivityThread.java:4627) 09-08 15:41:37.104: E/AndroidRuntime(1731): at java.lang.reflect.Method.invokeNative(Native Method) 09-08 15:41:37.104: E/AndroidRuntime(1731): at java.lang.reflect.Method.invoke(Method.java:521) 09-08 15:41:37.104: E/AndroidRuntime(1731): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 09-08 15:41:37.104: E/AndroidRuntime(1731): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 09-08 15:41:37.104: E/AndroidRuntime(1731): at dalvik.system.NativeStart.main(Native Method) 09-08 15:41:37.104: E/AndroidRuntime(1731): Caused by: android.view.InflateException: Binary XML file line #21: Error inflating class fragment 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:582) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.view.LayoutInflater.rInflate(LayoutInflater.java:618) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.view.LayoutInflater.inflate(LayoutInflater.java:407) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 09-08 15:41:37.104: E/AndroidRuntime(1731): at com.actionbarsherlock.internal.ActionBarSherlockCompat.setContentView(ActionBarSherlockCompat.java:840) 09-08 15:41:37.104: E/AndroidRuntime(1731): at com.actionbarsherlock.app.SherlockFragmentActivity.setContentView(SherlockFragmentActivity.java:262) 09-08 15:41:37.104: E/AndroidRuntime(1731): at com.nikolov.ivan.android.metalafisha.HomeActivity.onCreate(HomeActivity.java:27) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 09-08 15:41:37.104: E/AndroidRuntime(1731): ... 12 more 09-08 15:41:37.104: E/AndroidRuntime(1731): Caused by: java.lang.IllegalStateException: Fragment com.nikolov.ivan.android.metalafisha.fragments.ArticleFragment did not create a view. 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:293) 09-08 15:41:37.104: E/AndroidRuntime(1731): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:558) 09-08 15:41:37.104: E/AndroidRuntime(1731): ... 21 more </code></pre> <p>Seems like something strange is going on when I have the <strong>CacheFragment</strong> created before switching to landscape mode.</p> <p>Another thing I notice is that I see calls to the <strong>onCreateView</strong>, when the Android documentation states that it should not be called for no UI fragments.</p> <p>I made sure that I have IDs in the layout file, I even checked if they are globally unique for the application and many other things that seemed reasonable, but I still see the same result. The only way this doesn't happen is if I don't add the <strong>CacheFragment</strong> with the transaction, but then there is really no point of having it...</p> <p>Based on the message it looks like Android is confusing the <strong>CacheFragment</strong> with the <strong>ArticleFragment</strong>...</p> <p>Any help will be greatly appreciated, as I seem to run out of ideas what I can be doing wrong!</p>
 

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