我将此RecyclerView与此Github Repository
中的searchView应用一起使用我所做的唯一更改不是从字符串数组中获取结果，而是使用volley从Web服务器检索数据。我已经添加了一个单人类以及排球需要它。我得到的唯一问题是，在应用程序启动时，列表不会显示，直到我点击搜索图标并在其上键入一些文本/字符。我非常确定我能够从网络服务器检索数据，因为它会在搜索视图上输入内容时显示出来。尝试测试它们，请告诉我你是否能够解决它。
在repo上，MainFragment看起来与下面的代码相同，只是添加了我从服务器获取数据的代码。看看我的代码：
public class MainFragment extends Fragment implements SearchView.OnQueryTextListener {
public static MainFragment newInstance() {
return new MainFragment();
}
private static String url = "http://www.psite7.org/portal/webservices/get_members.php";
private static final String[] MOVIES = new String[]{
"The Woman in Black: Angel of Death",
"20 Once Again",
"Taken 3",
"Tevar",
"I",
"Blackhat",
"Spare Parts",
"The Wedding Ringer",
"Ex Machina",
"Mortdecai",
"Strange Magic",
"The Boy Next Door",
"The SpongeBob Movie: Sponge Out of Water",
"Kingsman: The Secret Service",
"Boonie Bears: Mystical Winter",
"Project Almanac",
"Running Man",
"Wild Card",
"It Follows",
"C'est si bon",
"Yennai Arindhaal",
"Shaun the Sheep Movie",
"Jupiter Ascending",
"Old Fashioned",
"Somewhere Only We Know",
"Fifty Shades of Grey",
"Dragon Blade",
"Zhong Kui: Snow Girl and the Dark Crystal",
"Badlapur",
"Hot Tub Time Machine 2",
"McFarland, USA",
"The Duff",
"The Second Best Exotic Marigold Hotel",
"A la mala",
"Focus",
"The Lazarus Effect",
"Chappie",
"Faults",
"Road Hard",
"Unfinished Business",
"Cinderella",
"NH10",
"Run All Night",
"X+Y",
"Furious 7",
"Danny Collins",
"Do You Believe?",
"Jalaibee",
"The Divergent Series: Insurgent",
"The Gunman",
"Get Hard",
"Home"
};
private RecyclerView mRecyclerView;
private ExampleAdapter mAdapter;
private List<ExampleModel> mModels;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.fragment_main, container, false);
mRecyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
return view;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
setHasOptionsMenu(true);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
mModels = new ArrayList<>();
// for (String movie : MOVIES) {
// mModels.add(new ExampleModel(movie));
// }
populate();
// mAdapter = new ExampleAdapter(getActivity(), mModels);
// mRecyclerView.setAdapter(mAdapter);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu_main, menu);
final MenuItem item = menu.findItem(R.id.action_search);
final SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(this);
}
@Override
public boolean onQueryTextChange(String query) {
final List<ExampleModel> filteredModelList = filter(mModels, query);
mAdapter.animateTo(filteredModelList);
mRecyclerView.scrollToPosition(0);
return true;
}
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
private List<ExampleModel> filter(List<ExampleModel> models, String query) {
query = query.toLowerCase();
final List<ExampleModel> filteredModelList = new ArrayList<>();
for (ExampleModel model : models) {
final String text = model.getText().toLowerCase();
if (text.contains(query)) {
filteredModelList.add(model);
}
}
return filteredModelList;
}
public void populate(){
JsonArrayRequest request = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray jsonArray) {
// hidePDialog();
String email, status;
// Member member;
final String names[] = new String[jsonArray.length()];
for(int i = 0; i < jsonArray.length(); i++) {
try {
JSONObject object = jsonArray.getJSONObject(i);
names[i] = object.getString("firstname") + " " + object.getString("lastname");
email = object.getString("email");
if(Integer.parseInt(object.getString("activated"))==1){
status = "Active";
}else{
status = "Not Active";
}
// member = new Member(name, email, status);
} catch (Exception e) {
}
}
for(String name : names){
Log.wtf("name", name);
mModels.add(new ExampleModel(name));
}
mAdapter.notifyDataSetChanged();
}
}, new Response.ErrorListener(){
@Override
public void onErrorResponse(VolleyError volleyError) {
volleyError.printStackTrace();
}
});
AppController.getInstance().addToRequestQueue(request);
mAdapter = new ExampleAdapter(getActivity(), mModels);
mRecyclerView.setAdapter(mAdapter);
}
}
如果您注意到我刚刚评论了回购邮件中使用的代码。我试图尽可能地复制它。
答案 0 :(得分：0)
您正在混合同步和异步代码。如果您在将所有模型添加到$scope.$watch('[form0.$valid,form1.$valid,form2.$valid]', function(forms) {
var disabled = false;
angular.forEach(forms,function(form){
if(!form) disabled = true;
});
$scope.subDisable = disabled;
}, true);
后创建并分配ExampleAdapter，则它应该可以正常运行。
mModels更好的方法是在public void populate() {
final JsonArrayRequest request = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray jsonArray) {
try {
for (int i = 0; i < jsonArray.length(); i++) {
final JSONObject object = jsonArray.getJSONObject(i);
final String name = object.getString("firstname") + " " + object.getString("lastname");
mModels.add(new ExampleModel(name));
}
mAdapter = new ExampleAdapter(getActivity(), mModels);
mRecyclerView.setAdapter(mAdapter);
} catch (JSONException e) {
Log.e(LOG_TAG, "Failed to parse member json.", e);
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
volleyError.printStackTrace();
}
});
AppController.getInstance().addToRequestQueue(request);
}
中创建Adapter一次，然后在模型列表更改时使用onViewCreated()方法：
animateTo()这两件事都有效，正是你所尝试的 - 这正在修改你@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mAdapter = new ExampleAdapter(getActivity(), new ArrayList<>());
mRecyclerView.setAdapter(mAdapter);
...
updateMemberList();
}
public void updateModels() {
final JsonArrayRequest request = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray jsonArray) {
try {
for (int i = 0; i < jsonArray.length(); i++) {
final JSONObject object = jsonArray.getJSONObject(i);
final String name = object.getString("firstname") + " " + object.getString("lastname");
mModels.add(new ExampleModel(name));
}
mAdapter.animateTo(mModels);
} catch (JSONException e) {
Log.e(LOG_TAG, "Failed to parse member json.", e);
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
volleyError.printStackTrace();
}
});
AppController.getInstance().addToRequestQueue(request);
}
中的List - 没有。 Fragment有自己的内部Adapter模型，如果您想要更改List中显示的内容，则需要修改该模型。