Android，ListView IllegalStateException:“；适配器的内容已更改，但ListView未收到通知；

我想做什么：运行后台线程，在计算结果的同时计算ListView内容并部分更新ListView

我知道我必须避免的事情：我无法处理后台线程中的ListAdapter内容，因此我从onProgressUpdate继承了AsyncTask并发布结果（将条目添加到适配器）。我的适配器使用结果对象的ArrayList，这些ArrayList上的所有操作都是同步的

对他人的研究：有非常有价值的数据。对于大约500名用户，我几乎每天都会遇到崩溃，当我在onProgressUpdate中添加

list.setVisibility（GONE）/trackList.setVisibility（VISIBLE）

block时，崩溃降低了10倍，但并没有消失。（这是在中提出的）

我有时会得到什么：请注意，这种情况很少发生（3.5k用户中的一个每周一次）。但我想彻底摆脱这个错误。以下是部分堆栈跟踪：

`java.lang.IllegalStateException:` The content of the adapter has changed but ListView  did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. [in ListView(2131296334, class android.widget.ListView) with Adapter(class com.transportoid.Tracks.TrackListAdapter)]
at android.widget.ListView.layoutChildren(ListView.java:1432)
at android.widget.AbsListView.onTouchEvent(AbsListView.java:2062)
at android.widget.ListView.onTouchEvent(ListView.java:3234)
at android.view.View.dispatchTouchEvent(View.java:3709)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:852)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
[...]

帮助？不再需要，请参见下文

---

最终答案：事实证明，我每5次插入都会调用

notifyDataSetChanged

，以避免闪烁和突然的列表更改。这样做是不可能的，当基列表更改时，总是通知适配器。这个bug对我来说已经消失很久了。

我编写了这段代码，并让它在2.1模拟器映像中运行了12个小时，但没有得到非法状态异常。我要让android框架受益于这一点，并说这很可能是代码中的错误。我希望这有帮助。也许你可以根据你的列表和数据调整它

public class ListViewStressTest extends ListActivity {
    ArrayAdapter<String> adapter;
    ListView list;
    AsyncTask<Void, String, Void> task;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        this.adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1);
        this.list = this.getListView();

        this.list.setAdapter(this.adapter);

        this.task = new AsyncTask<Void, String, Void>() {
            Random r = new Random();
            int[] delete;
            volatile boolean scroll = false;

            @Override
            protected void onProgressUpdate(String... values) {
                if(scroll) {
                    scroll = false;
                    doScroll();
                    return;
                }

                if(values == null) {
                    doDelete();
                    return;
                }

                doUpdate(values);

                if(ListViewStressTest.this.adapter.getCount() > 5000) {
                    ListViewStressTest.this.adapter.clear();
                }
            }

            private void doScroll() {
                if(ListViewStressTest.this.adapter.getCount() == 0) {
                    return;
                }

                int n = r.nextInt(ListViewStressTest.this.adapter.getCount());
                ListViewStressTest.this.list.setSelection(n);
            }

            private void doDelete() {
                int[] d;
                synchronized(this) {
                    d = this.delete;
                }
                if(d == null) {
                    return;
                }
                for(int i = 0 ; i < d.length ; i++) {
                    int index = d[i];
                    if(index >= 0 && index < ListViewStressTest.this.adapter.getCount()) {
                        ListViewStressTest.this.adapter.remove(ListViewStressTest.this.adapter.getItem(index));
                    }
                }
            }

            private void doUpdate(String... values) {
                for(int i = 0 ; i < values.length ; i++) {
                    ListViewStressTest.this.adapter.add(values[i]);
                }
            }

            private void updateList() {
                int number = r.nextInt(30) + 1;
                String[] strings = new String[number];

                for(int i = 0 ; i < number ; i++) {
                    strings[i] = Long.toString(r.nextLong());
                }

                this.publishProgress(strings);
            }

            private void deleteFromList() {
                int number = r.nextInt(20) + 1;
                int[] toDelete = new int[number];

                for(int i = 0 ; i < number ; i++) {
                    int num = ListViewStressTest.this.adapter.getCount();
                    if(num < 2) {
                        break;
                    }
                    toDelete[i] = r.nextInt(num);
                }

                synchronized(this) {
                    this.delete = toDelete;
                }

                this.publishProgress(null);
            }

            private void scrollSomewhere() {
                this.scroll = true;
                this.publishProgress(null);
            }

            @Override
            protected Void doInBackground(Void... params) {
                while(true) {
                    int what = r.nextInt(3);

                    switch(what) {
                        case 0:
                            updateList();
                            break;
                        case 1:
                            deleteFromList();
                            break;
                        case 2:
                            scrollSomewhere();
                            break;
                    }

                    try {
                        Thread.sleep(0);
                    } catch(InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            }

        };

        this.task.execute(null);
    }
}

公共类ListViewStressTest扩展ListActivity{
阵列适配器；
列表视图列表；
异步任务；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
this.adapter=newarrayadapter（this，android.R.layout.simple\u list\u item\u 1）；
this.list=this.getListView（）；
this.list.setAdapter（this.adapter）；
this.task=new AsyncTask（）{
随机r=新随机（）；
int[]删除；
volatile boolean scroll=false；
@凌驾
受保护的void onProgressUpdate（字符串…值）{
如果（滚动）{
滚动=假；
多斯克罗尔（）；
返回；
}
如果（值==null）{
多德莱特（）；
返回；
}
双更新（值）；
if（ListViewStressTest.this.adapter.getCount（）>5000）{
ListViewStressTest.this.adapter.clear（）；
}
}
私有void doscorl（）{
if（ListViewStressTest.this.adapter.getCount（）==0）{
返回；
}
int n=r.nextInt（ListViewStressTest.this.adapter.getCount（））；
ListViewStressTest.this.list.setSelection（n）；
}
私有void doDelete（）{
int[]d；
已同步（此）{
d=这个。删除；
}
如果（d==null）{
返回；
}
对于（int i=0；i=0&&index

即使我在XMPP通知应用程序中也遇到了同样的问题

requestLayout();

mList.clear();
mList.addAll(newDataList);

List<> data = new ArrayList<>();
List<> adapterData = new ArrayList();

...
adapter = new Adapter(adapterData);
listView.setAdapter(adapter);

// Whenever data needs to be updated, it can be done in a separate thread
void updateDataAsync()
{
    new Thread(new Runnable()
    {
        @Override
        public void run()
        {
            // Make updates the "data" list.
            ...

            // Update your adapter.
            refreshList();
        }
    }).start();
}

void refreshList()
{
    runOnUiThread(new Runnable()
    {
        @Override
        public void run()
        {
            adapterData.clear();
            adapterData.addAll(data);
            adapter.notifyDataSetChanged();
            listView.invalidateViews();
        }
    });
}

    @Override
    public Void loadInBackground() {
        Log.v(TAG, "Init loadings contacts");
        synchronized (SingleTonProvider.getInstance()) {
            PhoneBookManager.preparePhoneBookContacts(getContext());
        }
    }

@Override
public Loader<PhoneBookContactAdapter> onCreateLoader(int arg0, Bundle arg1) {
    return new PhoneBookContactLoader(this);
}

@Override
public void onLoadFinished(Loader<PhoneBookContactAdapter> arg0, PhoneBookContactAdapter arg1) {
    contactList.setAdapter(adapter = arg1);
}

/*
 * AsyncLoader to load phonebook and notify the list once done.
 */
private static class PhoneBookContactLoader extends AsyncTaskLoader<PhoneBookContactAdapter> {

    private PhoneBookContactAdapter adapter;

    public PhoneBookContactLoader(Context context) {
        super(context);
    }

    @Override
    public PhoneBookContactAdapter loadInBackground() {
        synchronized (SingleTonProvider.getInstance()) {
            return adapter = new PhoneBookContactAdapter(getContext());    
        }
    }

}

        } else if (mItemCount != mAdapter.getCount()) {
            throw new IllegalStateException("The content of the adapter has changed but "
                    + "ListView did not receive a notification. Make sure the content of "

    @Override
    public void onChanged() {
        mDataChanged = true;
        mOldItemCount = mItemCount;
        mItemCount = getAdapter().getCount();

public void updateUnderlyingContacts(List<Contact> newContacts, String filter)
{
    this.allContacts = newContacts;
    this.filteredContacts = newContacts;
    getFilter().filter(filter);
}

public void updateUnderlyingContacts(List<Contact> newContacts, String filter)
{
    this.allContacts = newContacts;
    this.filteredContacts = newContacts;
    notifyDataSetChanged(); // Fix
    getFilter().filter(filter);
}

public class FeedAdapter extends BaseAdapter {
    private int size = 0;
    private final List<Feed> objects;

    public FeedAdapter(Activity context, List<Feed> objects) {
        this.context = context;
        this.objects = objects;
        size = objects.size();
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ...
    }

    @Override
    public void notifyDataSetChanged() {
        size = objects.size();

        super.notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return size;
    }

    @Override
    public Object getItem(int position) {
        try {
            return objects.get(position);
        } catch (Error e) {
            return Feed.emptyFeed;
        }
    }

    @Override
    public long getItemId(int position) {
        return position;
    }
}

         adapter.notifyDataSetChanged();

       protected void onPostExecute(Void args) {
        adapter.notifyDataSetChanged();
        // Close the progressdialog
        mProgressDialog.dismiss();
         }

@Override
public void notifyDataSetChanged() {
    recalculate();
    super.notifyDataSetChanged();
}

`java.lang.IllegalStateException:` The content of the adapter has changed but ListView  did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. [in ListView(2131296334, class android.widget.ListView) with Adapter... etc

 protected void onPostExecute(Void aVoid) {

 all my other stuff etc...
    all my other stuff etc...

           adapter.notifyDataSetChanged();

                }

            });
        }

@Override
protected Void doInBackground(Void... voids) {

    runOnUiThread(new Runnable() {
                      public void run() { etc... etc...

public class MyActivity... {
    private MyTask task;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
       // your code
       task = new MyTask();
       setList();
    }

    private void setList() {
    if (task != null)
        if (task.getStatus().equals(AsyncTask.Status.RUNNING)){
            task.cancel(true);
            task = new MyTask();
            task.execute();         
        } else if (task.getStatus().equals(AsyncTask.Status.FINISHED)) {
            task = new MyTask();
            task.execute();
        } else 
            task.execute();
    }

    class MyTask extends AsyncTask<Void, Item, Void>{
       List<Item> Itens;

       @Override
       protected void onPreExecute() {

        //your code

        list.setVisibility(View.GONE);
        adapterItem= new MyListAdapter(MyActivity.this, R.layout.item, new ArrayList<Item>());
        list.setAdapter(adapterItem);

        adapterItem.notifyDataSetChanged();
    }

    @Override
    protected Void doInBackground(Void... params) {

        Itens = getItens();
        for (Item item : Itens) {
            publishProgress(item );
        }

        return null;
    }

    @Override
    protected void onProgressUpdate(Item ... item ) {           
        adapterItem.add(item[0]);
    }

    @Override
    protected void onPostExecute(Void result) {
        //your code
        adapterItem.notifyDataSetChanged();     
        list.setVisibility(View.VISIBLE);
    }

}

}

   @Override
    public void notifyDataSetChanged() {
        saveCurrentTalebeOnShare(currentTalebe);
        super.notifyDataSetChanged();
    }

 InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(v.getWindowToken(), 0);

        view.postDelayed(new Runnable() {
            @Override
            public void run() {
                refreshList();
            }
        },100L);

adapter.notifyDataSetChanged()