IllegalStateException:The 适配器的内容已更改但 ListView 未收到通知

Question

凭直觉，我知道，当它抛出 IllegalStateException 时。但是就我而言，我可能无法猜测来源的问题在哪里。我敢说，有麻烦的线路：

private class LoadMoreDataTask extends AsyncTask<Void, Void, Void> {
    @Override
    protected Void doInBackground(Void... params) {
        if (isCancelled()) {
            return null;
        }
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
        }
        OFFSET = OFFSET + COUNT;
        getWallsData();
        return null;
    }
    @Override
    protected void onPostExecute(Void result) { 

        mPostListAdapter.notifyDataSetChanged();                
        wallPostsList.onLoadMoreComplete();
        super.onPostExecute(result);
    }
    @Override
    protected void onCancelled() {
        wallPostsList.onLoadMoreComplete();
    }

有一条 logcat 消息：

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(2131099757, class com.costum.android.widget.LoadMoreListView) with Adapter(class android.widget.HeaderViewListAdapter)]

Answer 1

问题是 fixed:the 找到答案 there ！我做了什么？我添加了切换器 Boolean LOADMORE SWITCHER=false;作为全局可见性并替换 mPostListAdapter.notifyDataSetChanged();从 doInBackground() 到 getWallsData()。

private Boolean LOADMORE SWITCHER=false;
....
private class LoadMoreDataTask extends AsyncTask<Void, Void, Void> {
    @Override
    protected Void doInBackground(Void... params) {
        if (isCancelled()) {
            return null;
        }
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
        }
        OFFSET = OFFSET + COUNT;
        LOADMORE=true;
        getWallsData();
        return null;
    }
    @Override
    protected void onPostExecute(Void result) { 

       // mPostListAdapter.notifyDataSetChanged(); was replaced to getWallsData() body
        wallPostsList.onLoadMoreComplete();
        super.onPostExecute(result);
    }
    @Override
    protected void onCancelled() {
        wallPostsList.onLoadMoreComplete();
    } 
}
.....
getWallsData(){
     ...
     if(LOADMORE){
          mPostListAdapter.notifyDataSetChanged();
          LOADMORE=false;


     }
}

我非常非常高兴地说：我再也没有这个问题了：

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(2131099757, class com.costum.android.widget.LoadMoreListView) with Adapter(class android.widget.HeaderViewListAdapter)]

IllegalStateException:The 适配器的内容已更改但 ListView 未收到通知

IllegalStateException:The content of the adapter has changed but ListView did not receive a notification

android

listview

illegalstateexception