问题
I have Spinner, EditText and a RecyclerView in my Activity. Everything is going good but sometimes my recyclerView is not Visible till I click on EditText in my Activity. I debug my code everything is passed in adapter
private void createRecycler(ArrayList<ProductNLCModel> productNLCModels) {
rcycler_productlist.setVisibility(View.VISIBLE);
rcycler_productlist.setHasFixedSize(true);
SnapHelper snapHelper = new PagerSnapHelper();
rcycler_productlist.setOnFlingListener(null);
snapHelper.attachToRecyclerView(rcycler_productlist);
LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
rcycler_productlist.setLayoutManager(layoutManager);
product_name = et_productname.getText().toString();
PlaceOrderAdapter placeOrderAdapter = new PlaceOrderAdapter(productNLCModels, PlaceOrder.this, this, PlaceOrder.this, main_category, product_name);
rcycler_productlist.setAdapter(placeOrderAdapter);
placeOrderAdapter.notifyDataSetChanged();
placeOrderAdapter.notifyItemInserted(productNLCModels.size());
rcycler_productlist.smoothScrollToPosition(0);
placeOrderAdapter.setClickListener(this);
et_productname.requestFocus();
}
above is my method to passing data to recyclerView. it loads data to my Recyclerview but I don't know due to some reasons it is not showing but when I click on my editText RecyclerView showing data
in manifest i have added:
<activity
android:name=".PlaceOrder"
android:configChanges="orientation"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateAlwaysHidden"
android:launchMode="singleTask"/>
below is my XML:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="@dimen/margin_10">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:text="Search Product via(Category or Compatibility)"
android:textColor="@color/black"
android:textSize="@dimen/margin_16"
/>
<Spinner
android:id="@+id/spinner_category"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/spinner_background" />
<android.support.design.widget.TextInputLayout
android:id="@+id/txtinput_productname"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/shadow_logo"
android:theme="@style/TextLabel">
<EditText
android:id="@+id/et_productname"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Product Name"
android:drawableRight="@drawable/searchdrawable"
android:inputType="text"
android:textSize="@dimen/margin_18" />
</android.support.design.widget.TextInputLayout>
<!--<Button-->
<!--android:id="@+id/btn_search"-->
<!--android:layout_width="wrap_content"-->
<!--android:layout_height="wrap_content"-->
<!--android:layout_gravity="end"-->
<!--android:layout_marginRight="@dimen/margin_10"-->
<!--android:layout_marginTop="@dimen/margin_30"-->
<!--android:background="@color/colorPrimaryDarker"-->
<!--android:textColor="@color/white"-->
<!--android:textSize="13sp"-->
<!--android:padding="@dimen/margin_10"-->
<!--android:text="Search"/>-->
<android.support.v7.widget.RecyclerView
android:id="@+id/rcycler_productlist"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="@dimen/margin_3"
android:focusableInTouchMode="true"
android:descendantFocusability="beforeDescendants"
android:windowSoftInputMode="stateHidden|adjustPan"
android:orientation="horizontal"/>
</LinearLayout>
I am calling this method from WebApi response:
private void getProductList(String str) throws JSONException { ProductNLCModel productNLCModel = null;
JSONArray jsonArray = new JSONArray(str);
for (int i = 0; i < jsonArray.length(); i++) {
productNLCModel = new ProductNLCModel();
JSONObject productJson = jsonArray.optJSONObject(i);
productNLCModel.setCategory(productJson.optString(WebKeys.Key_Category));
productNLCModel.setS_no(productJson.optString(WebKeys.Sno));
productNLCModel.setProductId(productJson.optString(WebKeys.ProductId));
productNLCModel.setImagePath(productJson.optString(WebKeys.ImagePath));
productNLCModel.setProductName(productJson.optString(WebKeys.Key_ProductName));
productNLCModel.setCompatible(productJson.optString(WebKeys.Compatible));
productNLCModel.setSpecification(productJson.optString(WebKeys.Specification));
productNLCModel.setMRP(productJson.optString(WebKeys.MRP));
productNLCModel.setDP(productJson.optString(WebKeys.DP));
productNLCModel.setNLC(productJson.optString(WebKeys.NLC));
if (i == 0) {
JSONArray categoryDetailArray = productJson.optJSONArray(WebKeys.GetCategoryDetail);
for (int j = 0; j < categoryDetailArray.length(); j++) {
JSONObject discountstructure = categoryDetailArray.optJSONObject(j);
str_categorydetail = str_categorydetail + discountstructure.optString(WebKeys.Turnover) + "@" + discountstructure.optString(WebKeys.Discount) + "%,";
}
}
productNLCModels.add(productNLCModel);
}
if(jsonArray.length()>0){
runOnUiThread(new Runnable() {
@Override
public void run() {
try {
category_detail.setSelected(true);
str_categorydetail = str_categorydetail.substring(0, str_categorydetail.length() - 1);
category_detail.setText(str_categorydetail);
} catch (Exception e) {
e.printStackTrace();
}
createRecycler(productNLCModels);
}
});
}
}
回答1:
This may happen because of smoothscrolling issue in your recycler view because it changes the Focus of you recyclerview. Try to eliminate or remove
rcycler_productlist.smoothScrollToPosition(0);
回答2:
You should remove the rcycler_productlist.smoothScrollToPosition(0); and try again.
Looks like placeOrderAdapter.notifyDataSetChanged(); and placeOrderAdapter.notifyItemInserted(productNLCModels.size()); these two statements has only one meaning, at a time you are notifying the data set and then you notify the inserted data, Instead you only need to write the placeOrderAdapter.notifyItemInserted(productNLCModels.size()); only and remove the notifyDataSetChanged();
来源：https://stackoverflow.com/questions/46067831/recyclerview-is-not-showing