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;
}

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;
}

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。

所以对我们来说，我们试图通过我们的AIDL接口发送一个太大的对象到远程服务。事务大小不能超过1MB。请求被分解为512KB的独立块，并通过接口一次发送一个。我知道这是一个残酷的解决方案，但是，嘿，它是Android:(

对我来说，它也是FragmentStatePagerAdapter，然而覆盖saveState()不起作用。以下是我的解决方法:

当调用FragmentStatePagerAdapter构造函数时，在类中保持一个单独的片段列表，并添加一个方法来删除这些片段:

class PagerAdapter extends FragmentStatePagerAdapter {
    ArrayList<Fragment> items;

    PagerAdapter(ArrayList<Fragment> frags) {
        super(getFragmentManager()); //or getChildFragmentManager() or getSupportFragmentManager()
        this.items = new ArrayList<>();
        this.items.addAll(frags);
    }

    public void removeFragments() {
        Iterator<Fragment> iter = items.iterator();

        while (iter.hasNext()) {
            Fragment item = iter.next();
                getFragmentManager().beginTransaction().remove(item).commit();
                iter.remove();
            }
            notifyDataSetChanged();
        }
    }
    //...getItem() and etc methods...
}

然后在Activity中，保存ViewPager的位置，并在重写的onSaveInstanceState()方法中调用adapter.removeFragments():

private int pagerPosition;

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    //save other view state here
    pagerPosition = mViewPager.getCurrentItem();
    adapter.removeFragments();
}

最后，在重写的onResume()方法中，如果适配器不为空，则重新实例化它。(如果它是空的，那么Activity是第一次被打开或应用程序被Android杀死后，onCreate将做适配器创建。)

@Override
public void onResume() {
    super.onResume();
    if (adapter != null) {
        adapter = new PagerAdapter(frags);
        mViewPager.setAdapter(adapter);
        mViewPager.setCurrentItem(currentTabPosition);
    }
}

I have also lived TransactionTooLargeException. Firstly I have worked on understand where it occurs. I know the reason why it occurs. Every of us know because of large content. My problem was like that and I solved. Maybe this solution can be useful for anybody. I have an app that get content from api. I am getting result from API in first screen and send it to second screen. I can send this content to second screen in successful. After second screen if I want to go third screen this exception occurs. Each of my screen is created from Fragment. I noticed that when I leave from second screen. It saves its bundle content. if this content is too large this exception happens. My solution is after I got content from bundle I clear it.

class SecondFragment : BaseFragment() {

    lateinit var myContent: MyContent

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        myContent = arguments?.getParcelable("mycontent")
        arguments?.clear()
    }