我在项目中导入了PullToRefreshListView这个包，然后实现了上拉刷新和下拉刷新的
接口，我在模拟器中调试程序，发现下拉刷新刷几次就崩了，报错：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. Make sure your adapter calls notifyDataSetChanged() when its content changes. [in ListView(16908298, class com.handmark.pulltorefresh.library.PullToRefreshListView$InternalListViewSDK9) with Adapter
网上说更新adpater要在UI线程里面进行。我是在UI线程里面进行的。我的整体思路是这样的：下拉刷新之后，在异步任务中下载数据，下载完成后用handler来告知主线程，在主线程中mAdapter.notifyDataSetChanged();然后pullToRefreshListView.onRefreshComplete();
感觉没什么问题啊，而且我还加了判断，当下拉刷新正在执行的话就直接onRefreshComplete但是在模拟器上面，滑动几次就报上面的错误了。然后我又在真机上面测试，滑了很多次又没有报错，难道是模拟器的原因吗？如果是模拟器的原因的那还好，万一不是的，但是真机上现在现在不报错，到时候上线了报错怎么办？求大神告知解决办法
我的代码：
public class ClubMemberActivity extends Activity {
private TopBar topBar;//顶部导航栏
private Listlist = new ArrayList<>();//数据集合
private TextView textView;//刚进入页面时提示用户正在加载数据
private PullToRefreshListView pullToRefreshListView;
private ClubMemberAdapter clubMemberAdapter;//Adapter
private boolean isRefresh = false;//判断是否正在执行刷新
Handler handler = new Handler(){
/**
* Subclasses must implement this to receive messages.
*
* @param msg
*/
@Override
public void handleMessage(Message msg) {
switch (msg.what){
case 0:
//更新pullToRefreshListview
clubMemberAdapter.list = list;
clubMemberAdapter.notifyDataSetChanged();
pullToRefreshListView.onRefreshComplete();
isRefresh = false;
break;
case 1:
textView.setVisibility(View.GONE);//数据加载完成后,设置此View为GONE
clubMemberAdapter = new ClubMemberAdapter(list, ClubMemberActivity.this,false);
pullToRefreshListView = (PullToRefreshListView) findViewById(R.id.id_lv_clubMM);
pullToRefreshListView.setAdapter(clubMemberAdapter);
pullToRefreshListView.setMode(PullToRefreshBase.Mode.BOTH);
pullToRefreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
@Override
public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
if (!isRefresh){
isRefresh = true;
new getDataTask().execute(1);
}else{
pullToRefreshListView.onRefreshComplete();
}
}
@Override
public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
if (!isRefresh){
isRefresh = true;
new getDataTask().execute(0);
}else{
pullToRefreshListView.onRefreshComplete();
}
}
});
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_clubmember);
initView();
}
//初始化一些控件
private void initView() {
topBar = (TopBar) findViewById(R.id.id_topBar_clubMM);
topBar.setOnTopBarClickListener(new TopBar.TopBarClickListener() {
@Override
public void OnClick_left() {
finish();
}
@Override
public void OnClick_center() {
}
@Override
public void OnClick_right() {
}
});
textView = (TextView) findViewById(R.id.id_txt_clubMM_loading);
getData();
}
/**
* 字符串转换为图片(模拟下载图片,所以先将本地的图片转换成字符串,在Adapter中再将字符串转换成图片)
* @param drawable
* @return
*/
public synchronized String drawableToByte(Drawable drawable) {
if (drawable != null) {
Bitmap bitmap = Bitmap
.createBitmap(
drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight(),
drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
: Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight());
drawable.draw(canvas);
int size = bitmap.getWidth() * bitmap.getHeight() * 4;
// 创建一个字节数组输出流,流的大小为size
ByteArrayOutputStream baos = new ByteArrayOutputStream(size);
// 设置位图的压缩格式，质量为100%，并放入字节数组输出流中
bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
// 将字节数组输出流转化为字节数组byte[]
byte[] imagedata = baos.toByteArray();
String icon= Base64.encodeToString(imagedata, Base64.DEFAULT);
return icon;
}
return null;
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public void getData(){
new Thread(){
@Override
public void run() {
/**
* 测试用数据
*/
for (int i = 0; i < 10; i++) {
ClubMembers clubmm = new ClubMembers();
clubmm.clubMembID = i + "";
clubmm.name = "死神" + i;
clubmm.photo = drawableToByte(getDrawable(R.drawable.head));
clubmm.playerID = "palyerID" + i;
clubmm.worth = new Worth();
clubmm.worth.arena_worth = 100 + "";
clubmm.worth.arena_Name = "name" + i;
list.add(clubmm);
}
handler.sendEmptyMessage(1);
}
}.start();
}
private class getDataTask extends AsyncTask<Integer,Void,Integer>{
@Override
protected Integer doInBackground(Integer... params) {
//模拟下载数据
Log.e("infoo","开始异步操作");
if (params[0] == 1){
for (int i = 0;i<5;i++){
ClubMembers clubmm = new ClubMembers();
clubmm.clubMembID = i + "我是添加数据";
clubmm.name = "死神(我是添加的数据)" + i;
clubmm.photo = drawableToByte(getDrawable(R.drawable.head));
clubmm.playerID = "palyerID" + i;
clubmm.worth = new Worth();
clubmm.worth.arena_worth = 100 + "";
clubmm.worth.arena_Name = "name" + i;
list.add(0,clubmm);
}
}else{
for (int i = 0;i<5;i++){
ClubMembers clubmm = new ClubMembers();
clubmm.clubMembID = i + "我是添加数据";
clubmm.name = "死神(我是添加的数据)" + i;
clubmm.photo = drawableToByte(getDrawable(R.drawable.head));
clubmm.playerID = "palyerID" + i;
clubmm.worth = new Worth();
clubmm.worth.arena_worth = 100 + "";
clubmm.worth.arena_Name = "name" + i;
list.add(list.size(),clubmm);
}
}
Log.e("infoo","size === "+list.size());
return null;
}
@Override
protected void onPostExecute(Integer s) {
super.onPostExecute(s);
handler.sendEmptyMessage(0);
}
}
}
