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POUnable to instantiate fragment - java.lang.RuntimeException
 

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    <p>Hy guys, i got this stack trace from my developer console. Okay i'm not sure what cause this crash. because i never get this error by my self when test my app and just got it from developer console in google play.</p> <pre><code>java.lang.RuntimeException: Unable to start activity ComponentInfo{package.name/package.name.activity.SomeActivity}: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment package.name.photopreview.PhotoThumbnailFragmentAdapter$1: make sure class name exists, is public, and has an empty constructor that is public at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135) at android.app.ActivityThread.access$700(ActivityThread.java:140) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4921) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805) at dalvik.system.NativeStart.main(Native Method) Caused by: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment streetdirectory.mobile.modules.photopreview.PhotoThumbnailFragmentAdapter$1: make sure class name exists, is public, and has an empty constructor that is public at android.support.v4.app.Fragment.instantiate(Fragment.java:399) at android.support.v4.app.FragmentState.instantiate(Fragment.java:97) at android.support.v4.app.FragmentManagerImpl.restoreAllState(FragmentManager.java:1760) at android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:200) at streetdirectory.mobile.modules.businessdetail.BusinessDetailActivity.onCreate(BusinessDetailActivity.java:134) at android.app.Activity.performCreate(Activity.java:5188) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074) ... 11 more Caused by: java.lang.InstantiationException: can't instantiate class streetdirectory.mobile.modules.photopreview.PhotoThumbnailFragmentAdapter$1; no empty constructor at java.lang.Class.newInstanceImpl(Native Method) at java.lang.Class.newInstance(Class.java:1319) at android.support.v4.app.Fragment.instantiate(Fragment.java:388) ... 18 more </code></pre> <p>anybody can help me analyze this problem ? and give some useful suggestion to me . thanks, regards ..</p> <p><strong>EDIT</strong></p> <p>This is PhotoPreviewFragmentAdapter code.</p> <pre><code>public class PhotoPreviewFragmentAdapter&lt;T extends ImageListServiceOutput&gt; extends FragmentPagerAdapter { private ArrayList&lt;T&gt; mData = new ArrayList&lt;T&gt;(); public PhotoPreviewFragmentAdapter(FragmentManager fm) { super(fm); } public void setData(ArrayList&lt;T&gt; data) { mData = data; } @SuppressLint("ValidFragment") @Override public Fragment getItem(final int position) { PhotoPreviewFragment view = new PhotoPreviewFragment() { @Override public ImageListServiceOutput getData() { if (position &lt; mData.size()) { return mData.get(position); } return null; } }; return view; } @Override public int getCount() { // TODO Add Photo Button //return mData.size()+1; return mData.size(); } } </code></pre> <p>give some clue about how to reproduce this crash may be will help me so much. thanks</p> <p><strong>EDIT</strong></p> <p>May be the problem is (just like <strong>Streets Of Boston</strong> said) the anonymous inner class in PhotoTumbnailFragmentAdapter, i used it in this method</p> <pre><code>public Fragment getItem(final int position) { PhotoThumbnailFragment view = new PhotoThumbnailFragment() { @Override public ImageListServiceOutput getData() { if (position &lt; mData.size()) { return mData.get(position); } return null; } public void onPhotoClicked(ImageListServiceOutput data) { if (mImageClickedListener != null) { if (data != null) { Logger.info("Photo Clicked"); mImageClickedListener.onImageClicked(data, position); } else { Logger.info("Add Photo Clicked"); mImageClickedListener.onAddImageClicked(position); } } } }; return view; } </code></pre> <p>PhotoThumbnailFragment is an independent class btw. </p>
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    1. USKhairil Ushan
    1. USKhairil Ushan
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    1. COCan you post your `PhotoThumbnailFragmentAdapter` code ?
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      1. USGrIsHu
    2. COi've edited my question ..
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      1. POUnable to instantiate fragment - java.lang.RuntimeException
      1. USKhairil Ushan
    3. COYou used annonymous PhotoPreviewFragment. You should not use annonymous fragment class. Change it into non-annonymous class. If you should access `mData`, you can access it by implementing setter method for `mData`
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      1. POUnable to instantiate fragment - java.lang.RuntimeException
      1. USkingori
 

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