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POInstantiationException on Orientation Change when DialogFragment is on the top
 

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  1. POInstantiationException on Orientation Change when DialogFragment is on the top
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    <p>I have a <code>DialogFragment</code> defined as <strong>inner</strong> class in my <code>Fragment</code> class. On Orientation Change even the following exception is poped up: </p> <pre><code> Caused by: android.app.Fragment$InstantiationException: Unable to instantiate fragment my.package.fragments.ImportFragment$FailedImportDialog: make sure class name exists, is public, and has an empty constructor that is public at android.app.Fragment.instantiate(Fragment.java:585) at android.app.FragmentState.instantiate(Fragment.java:96) at android.app.FragmentManagerImpl.restoreAllState(FragmentManager.java:1682) at android.app.Activity.onCreate(Activity.java:861) at my.package.activities.ImportActivity.onCreate(ImportActivity.java:8) at android.app.Activity.performCreate(Activity.java:4465) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) ... 12 more Caused by: java.lang.InstantiationException: can't instantiate class my.package.fragments.ImportFragment$FailedImportDialog; no empty constructor at java.lang.Class.newInstanceImpl(Native Method) at java.lang.Class.newInstance(Class.java:1319) at android.app.Fragment.instantiate(Fragment.java:574) </code></pre> <p>But I do have public constructor: </p> <pre><code>class FailedImportDialog extends DialogFragment { private EditText edtPassword; private Button button; public FailedImportDialog() { // Here it is! } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.another_password_dialog, container, false); edtPassword = (EditText) v.findViewById(R.id.another_password_dialog_et_password); getDialog().setTitle(R.string.failed_to_decrypt); Button button = (Button) v.findViewById(R.id.another_password_dialog_btn_ok); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { }); return v; } } </code></pre> <p>Here is xml: </p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:padding="10dp"&gt; &lt;TextView android:id="@+id/another_password_dialog_tv_text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/what_password_did_you_use"&gt; &lt;/TextView&gt; &lt;EditText android:id="@+id/another_password_dialog_et_password" android:layout_height="wrap_content" android:layout_width="match_parent" android:inputType="textPassword"&gt; &lt;requestFocus&gt; &lt;/requestFocus&gt; &lt;/EditText&gt; &lt;Button android:id="@+id/another_password_dialog_btn_ok" android:layout_height="wrap_content" android:layout_width="match_parent" android:text="OK"&gt; &lt;/Button&gt; &lt;/LinearLayout&gt; </code></pre> <p>Do you guys know why this exception happens? Thank you!</p> <p><strong>UPDATE:</strong> If I move a class to a separate file there is no such an exception, everything goes smoothly. So the question is - why this exception happens when <code>DialogFragment</code> is an inner class?</p>
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    1. COCan you post the Fragment's XML. Also, can you show the code that instantiates the Fragment?
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    2. COtry making your class public like 'public class FailedImportDialog extends DialogFragment'
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    3. COWhat is code at Line No: 8 in your ImportActivity.java file?
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      1. USChintan Raghwani
 

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