我的项目中有一个recyclerview，数据没有绑定到recyclerview。我从服务器获取数据并正确地获取数据。我在适配器类中放了一个Toast，它正在工作。我无法弄清楚这个问题。
活动类......
public class ViewDealerCompln extends AppCompatActivity {
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.view_dealer_complain);
typeface = Typeface.createFromAsset(getAssets(), "productsans.ttf");
recyclerView = (RecyclerView) findViewById(R.id.com_recyclerView);
compList = new ArrayList<>();
toolbar = (Toolbar) findViewById(R.id.com_view_app_bar);
TextView mTitle = (TextView) toolbar.findViewById(R.id.toolbar_title);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setTitle("");
mTitle.setText("Complain History");
mTitle.setTypeface(typeface);
repID = DealerListAdapter.getRepID();
dealerID = DealerListAdapter.getDealerID();
mLayoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setAdapter(adcAdapter);
getData();
}
private void getData() {
String tag_string_req = "req_data";
request = new StringRequest(Request.Method.POST, AppConfig.URL_JSON_GETCOMPLAIN, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jsonObject = new JSONObject(response);
if (jsonObject.names().get(0).equals("feed")) {
JSONArray jsonFeedArray = jsonObject.getJSONArray("feed");
if (jsonFeedArray.length() > 0) {
for (int i = 0; i < jsonFeedArray.length(); i++) {
JSONObject currentObject = jsonFeedArray.getJSONObject(i);
String namemm = currentObject.getString("compId");
compList.add(namemm);
}
adcAdapter = new ViewDealerComplainAdapter(ViewDealerCompln.this, compList);
} else {
Toast.makeText(getApplicationContext(), "No data Available!", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getApplicationContext(), "Invalid Response from the server!", Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}) {
};
}
}
适配器类......
public class ViewDealerComplainAdapter extends RecyclerView.Adapter<ViewDealerComplainAdapter.ItemViewHolder> {
private LayoutInflater inflater;
private ArrayList<String> subList;
private Context context;
public ViewDealerComplainAdapter(Context context, ArrayList<String> a) {
this.context = context;
inflater = LayoutInflater.from(context);
this.subList = a;
Toast.makeText(context, subList.toString(), Toast.LENGTH_SHORT).show();
}
@Override
public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.custom_complain_list_row, parent, false);
ViewDealerComplainAdapter.ItemViewHolder holder = new ViewDealerComplainAdapter.ItemViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(ItemViewHolder holder, int position) {
holder.title.setText(subList.get(position));
}
@Override
public int getItemCount() {
return subList.size();
}
public class ItemViewHolder extends RecyclerView.ViewHolder {
private TextView title;
public ItemViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.compHID);
}
}
}
自定义行布局......
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="48dp">
<TextView
android:id="@+id/compHID"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white"
android:padding="10dp" />
</LinearLayout>
主要布局......
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include
android:id="@+id/com_view_app_bar"
layout="@layout/app_toolbar_send_complain"></include>
<android.support.v7.widget.RecyclerView
android:id="@+id/com_recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="5dp">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
答案 0 :(得分：1)
在你的活动中，在此行之前的recyclerView.setAdapter（adcAdapter）; 写
adcAdapter=new ViewDealerComplainAdapter(this,new ArrayList<String>())
在适配器中创建一个函数，如下所示
public void setData(ArrayList<String> data){
this.sublist=data;
}
现在，在函数getData（）中 在此之后
for (int i = 0; i < jsonFeedArray.length(); i++) {
JSONObject currentObject = jsonFeedArray.getJSONObject(i);
String namemm = currentObject.getString("compId");
compList.add(namemm);
}
写
adcAdapter.setData(compList);
adcAdapter.notifyDataSetChanged();
这将使你得到正确的结果
答案 1 :(得分：0)
从服务器加载数据后更新RecyclerView
adcAdapter = new ViewDealerComplainAdapter(ViewDealerCompln.this, compList);
adcAdapter.notifyDataSetChanged();
另一种方式
在Adapter
中创建一个方法public void setDataChange(List<Object> asList) {
this.List = asList;
//now, tell the adapter about the update
notifyDataSetChanged();
}
和
adcAdapter.setDataChange(list);
答案 2 :(得分：0)
我认为这是因为你在创建对象之前设置了适配器。
recyclerView.setAdapter(adcAdapter);
getData();
您首先将适配器设置为recyclerView，然后调用getData（）方法，在该方法中创建adcAdapter对象。
答案 3 :(得分：0)
你的适配器有两个参数context＆amp; arrayList，因此在创建适配器实例时，请确保将这两个值传递给适配器并将相同的适配器设置为RecyclerView。
mAdapter = new MAdapter（this，list）; mRecyclerView.setAdapter（mAdapter）;
列表中有数据后，将该列表传递给适配器。
答案 4 :(得分：-2)
在初始化之前，您将adcAdapter设置为recyclerView。
将代码更改为打击。
adcAdapter = new ViewDealerComplainAdapter(ViewDealerCompln.this, compList);
recyclerView.setAdapter(adcAdapter);
此外，您需要在适配器上调用notifyDataSetChanged()以在收到回复时更新recycleview。
adcAdapter.notifyDataSetChanged();