我得到了一个TransactionTooLargeException。无法复制的。文件里说
The Binder transaction failed because it was too large.
During a remote procedure call, the arguments and the return value of the call are transferred as Parcel objects stored in the Binder transaction buffer. If the arguments or the return value are too large to fit in the transaction buffer, then the call will fail and TransactionTooLargeException will be thrown.
...
There are two possible outcomes when a remote procedure call throws TransactionTooLargeException. Either the client was unable to send its request to the service (most likely if the arguments were too large to fit in the transaction buffer), or the service was unable to send its response back to the client (most likely if the return value was too large to fit in the transaction buffer).
...
在某个地方,我传递或接收的参数超出了未知的限制。在哪里?
stacktrace没有显示任何有用的东西:
java.lang.RuntimeException: Adding window failed
at android.view.ViewRootImpl.setView(ViewRootImpl.java:548)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:406)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:320)
at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:152)
at android.view.Window$LocalWindowManager.addView(Window.java:557)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2897)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$600(ActivityThread.java:139)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:4977)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.os.TransactionTooLargeException
at android.os.BinderProxy.transact(Native Method)
at android.view.IWindowSession$Stub$Proxy.add(IWindowSession.java:569)
at android.view.ViewRootImpl.setView(ViewRootImpl.java:538)
... 16 more
android.os.TransactionTooLargeException
at android.os.BinderProxy.transact(Native Method)
at android.view.IWindowSession$Stub$Proxy.add(IWindowSession.java:569)
at android.view.ViewRootImpl.setView(ViewRootImpl.java:538)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:406)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:320)
at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:152)
at android.view.Window$LocalWindowManager.addView(Window.java:557)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2897)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$600(ActivityThread.java:139)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:4977)
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:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
这似乎和观点有关?这与远程过程调用有什么关系?
可能重要的是:Android版本:4.0.3,设备:HTC One X
This was happening in my app because I was passing a list of search results in a fragment's arguments, assigning that list to a property of the fragment - which is actually a reference to the same location in memory pointed to by the fragment's arguments - then adding new items to the list, which also changed the size of the fragment's arguments. When the activity is suspended, the base fragment class tries to save the fragment's arguments in onSaveInstanceState, which crashes if the arguments are larger than 1MB. For example:
private ArrayList<SearchResult> mSearchResults;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (getArguments() != null && getArguments().getSerializable("SearchResults") != null) {
mSearchResults = (ArrayList) getArguments().getSerializable("SearchResults");
}
}
private void onSearchResultsObtained(ArrayList<SearchResult> pSearchResults) {
// Because mSearchResults points to the same location in memory as the fragment's arguments
// this will also increase the size of the arguments!
mSearchResults.addAll(pSearchResults);
}
在这种情况下,最简单的解决方案是将列表的副本分配给片段的属性,而不是分配引用:
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (getArguments() != null && getArguments().getSerializable("SearchResults") != null) {
// Copy value of array instead of reference
mSearchResults = new ArrayList((ArrayList) getArguments().getSerializable("SearchResults"));
}
}
一个更好的解决方案是不要在参数中传递这么多数据。
如果没有这个答案和TooLargeTool的帮助,我可能永远也不会找到这个。
TransactionTooLargeException已经困扰我们大约4个月了,我们终于解决了这个问题!
发生的是我们在ViewPager中使用FragmentStatePagerAdapter。用户将翻页并创建100多个片段(这是一个阅读应用程序)。
虽然我们在destroyItem()中正确地管理片段,但在android中
FragmentStatePagerAdapter的实现有一个bug,它保持了对以下列表的引用:
private ArrayList<Fragment.SavedState> mSavedState = new ArrayList<Fragment.SavedState>();
当Android的FragmentStatePagerAdapter尝试保存状态时,它将调用该函数
@Override
public Parcelable saveState() {
Bundle state = null;
if (mSavedState.size() > 0) {
state = new Bundle();
Fragment.SavedState[] fss = new Fragment.SavedState[mSavedState.size()];
mSavedState.toArray(fss);
state.putParcelableArray("states", fss);
}
for (int i=0; i<mFragments.size(); i++) {
Fragment f = mFragments.get(i);
if (f != null && f.isAdded()) {
if (state == null) {
state = new Bundle();
}
String key = "f" + i;
mFragmentManager.putFragment(state, key, f);
}
}
return state;
}
正如您所看到的,即使您正确地管理FragmentStatePagerAdapter子类中的片段,基类仍然会存储一个片段。SavedState用于创建的每个片段。TransactionTooLargeException会在数组被转储到parcelableArray时发生,而操作系统不希望它有100+项。
因此,我们的解决方案是重写saveState()方法,不为“状态”存储任何东西。
@Override
public Parcelable saveState() {
Bundle bundle = (Bundle) super.saveState();
bundle.putParcelableArray("states", null); // Never maintain any states from the base class, just null it out
return bundle;
}
我遇到过这个问题,我发现当服务和应用程序之间交换大量数据时(这涉及传输大量的缩略图)。实际上数据大小在500kb左右,IPC事务缓冲区大小设置为1024KB。我不确定为什么它超过了事务缓冲区。
当您通过intent extras传递大量数据时,也会发生这种情况
当您在应用程序中遇到此异常时,请分析您的代码。
您是否在服务和应用程序之间交换了大量数据?
使用intent共享海量数据,(例如用户从gallery共享中选择大量文件按share,所选文件的uri将使用intent传输)
从服务接收位图文件
等待android返回大量数据(例如,当用户安装了大量应用程序时,getInstalledApplications())
使用applyBatch()处理大量未决操作
当你得到这个异常时如何处理
如果可能的话,将大操作拆分为小块,例如,调用applyBatch()时不要使用1000个操作,而是每个操作使用100个。
服务和应用之间不交换大数据(>1MB)
我不知道怎么做,但是,不要查询android,它可以返回巨大的数据:-)
尝试使用EventBus或ContentProvider之类的解决方案。
如果你在同一个进程中(通常你所有的活动都是),尽量使用EventBus,因为在进程中数据交换不需要一个缓冲,所以你不需要担心你的数据太大。(你可以只使用方法调用来传递数据,而EventBus隐藏了丑陋的东西)
细节如下:
// one side
startActivity(intentNotTooLarge);
EventBus.getDefault().post(new FooEvent(theHugeData));
// the other side
@Subscribe public void handleData(FooEvent event) { /* get and handle data */ }
如果Intent的双方不在同一个进程中,可以尝试一些ContentProvider。
看到TransactionTooLargeException
Binder事务失败,因为它太大了。
在远程过程调用期间,调用的参数和返回值作为Parcel对象传输,存储在Binder事务缓冲区中。如果参数或返回值太大,无法放入事务缓冲区,则调用将失败,并抛出TransactionTooLargeException。