Hy家伙,我从我的开发者控制台获得了这个堆栈跟踪.好吧,我不确定导致这次崩溃的原因.因为我在测试我的应用程序时从来没有得到这个错误,只是从谷歌播放的开发者控制台得到它.
java.lang.RuntimeException: Unable to start activity ComponentInfo{package.name/package.name.activity.someActivity}: androID.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment package.name.photoprevIEw.PhotothumbnailFragmentAdapter: make sure class name exists, is public, and has an empty constructor that is publicat androID.app.ActivityThread.performlaunchActivity(ActivityThread.java:2110)at androID.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)at androID.app.ActivityThread.access0(ActivityThread.java:140)at androID.app.ActivityThread$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: make sure class name exists, is public, and has an empty constructor that is publicat 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 moreCaused by: java.lang.InstantiationException: can't instantiate class streetdirectory.mobile.modules.photoprevIEw.PhotothumbnailFragmentAdapter; no empty constructorat 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
有人可以帮我分析一下这个问题吗?并给我一些有用的建议.
感谢和问候 ..
编辑
这是PhotoprevIEwFragmentAdapter代码.
public class PhotoprevIEwFragmentAdapter<T extends ImageListServiceOutput> extends FragmentPagerAdapter { private ArrayList<T> mData = new ArrayList<T>(); public PhotoprevIEwFragmentAdapter(FragmentManager fm) { super(fm); } public voID setData(ArrayList<T> data) { mData = data; } @Suppresslint("ValIDFragment") @OverrIDe public Fragment getItem(final int position) { PhotoprevIEwFragment vIEw = new PhotoprevIEwFragment() { @OverrIDe public ImageListServiceOutput getData() { if (position < 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(); }}
给出一些关于如何重现这次崩溃的线索可能会对我有所帮助.谢谢
编辑
可能是问题是(就像Streets Of Boston所说的)PhotoTumbnailFragmentAdapter中的匿名内部类,我在这个方法中使用它
public Fragment getItem(final int position) { PhotothumbnailFragment vIEw = new PhotothumbnailFragment() { @OverrIDe public ImageListServiceOutput getData() { if (position < 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; }
PhotothumbnailFragment是一个独立的班级顺便说一句.
解决方法:
看起来您没有为PhotothumbnailFragmentAdapter定义空构造函数.
片段应该有一个空的构造函数
public PhotothumbnailFragmentAdapter(){//empty constructor}
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