recycler-adapter | 易学教程

How to use shared preferences in RecyclerView.Adapter?

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问题 How to use shared preferences in RecyclerView.Adapter..? i have used shared preference value in RecyclerView.Adapter..but nothing is saving in shared preference..where exactly i have to use shared preference ..?in RecyclerView.Adapter or activity..? public class CardAdapter extends RecyclerView.Adapter<CardAdapter.ViewHolder> { private ImageLoader imageLoader; private Context context; private String gd; public static final String SHARED_PREF_NAME = "myloginapp"; //We will use this to store

I want to scroll multiple recyclerview at a time how to achieve that

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问题 I want to scroll multiple RecyclerView at a time how to achieve that Exp- I have 3 RecyclerView in horizontal and when i scroll 1st RecyclerView then second and third shoul also scroll how to do that ? 回答1: The answer is very simple, you have to get scroll feedback from one recycleview and pass it to other recycleviews. But very carefully. you need to keep referance of which recyclerview starts giving scroll feedback, so that it won't enter into continious loop. so create a global variable

Unable to start activity from within setOnClick Listener of Recycler View adapter

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问题 I have implemented a recycler view with grid layout manager to create a category list. Now basically i have tried to implement a setOnClick Listener in my holder inside OnCreateViewholder Method. While running the code, I am getting this error android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want? Here is my Adapter Code package com.paaltao.Adapters; import android.content

Countdown timer in recyclerview not working properly

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问题 I have created a recyclerview that contains multiple data and a countdown timer too . All the things working properly untill i couldn't scroll the list . when i scroll down the list countdowntimer will conflicts with the above view items . It counts the current view time and the random time also . I tried too many things to solved it but couldn't able to . Please help me out . Thanks in advance . Here is my RecyclerAdapter's code . public class ReferendumQuestionAdapter extends RecyclerView

Recycler View Blur and Repeat Issue

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问题 My app contains an activity containing a toolbar(app-bar), ad-mob and an fragment.thr frament consists a RecyclerView. I just used basic RecylerView methods in its adapter for inflation and onbindview.....etc, and i used Linear-Layout Inflater. It works fine most of the times but some times (say 1 out of 50 times) it blurs and repeats views in the Top and Bottom of the screen including ToolBar(App-Bar) and navigation-bar and also some part of recyler view and there are no errors in the LogCat

Android RecyclerView Adapter is giving null on unit testing

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问题 I am trying to test RecyclerView with AndroidJunit4, it is my test code: package com.kaushik.myredmart.ui; // all includes @RunWith(AndroidJUnit4.class) public class ProductListActivityTest { @Rule public ActivityTestRule<ProductListActivity> rule = new ActivityTestRule<>(ProductListActivity.class); @Test public void ensureListViewIsPresent() throws Exception { ProductListActivity activity = rule.getActivity(); View viewByIdw = activity.findViewById(R.id.productListView); assertThat(viewByIdw

How to programmatically scroll to the bottom of a Recycler View? [duplicate]

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问题 This question already has answers here : How to scroll to the bottom of a RecyclerView? scrollToPosition doesn't work (17 answers) Closed 3 years ago . I want to scroll to the bottom of a recycler view on click of a button, how do I do this? 回答1: You have to make use of LayoutManager for that. Follow the below steps. 1). First of all, declare LayoutManager in your Activity/Fragment . For example, I have taken LinearLayoutManager private LinearLayoutManager mLinearLayoutManager; 2). Initialise

I want to scroll multiple recyclerview at a time how to achieve that

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I want to scroll multiple RecyclerView at a time how to achieve that Exp- I have 3 RecyclerView in horizontal and when i scroll 1st RecyclerView then second and third shoul also scroll how to do that ? The answer is very simple, you have to get scroll feedback from one recycleview and pass it to other recycleviews. But very carefully. you need to keep referance of which recyclerview starts giving scroll feedback, so that it won't enter into continious loop. so create a global variable private int draggingView = -1; Add scrollListener to all your recyclerviews mRecyclerView1.addOnScrollListener

FirebaseIndexRecyclerAdapter onDataChanged is called but getItemCount() always return 0

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I'm using FirebaseIndexRecyclerAdapter which gets a keyRef and dataRef and is very helpful with getting all dataRef's children which their keys exists as children in keyRef. The data is being displayed correctly but if i'm overriding onDataChanged for hiding a progress bar and/or displaying an empty state depends on the itemsCount (Something which i've already done with FirebaseRecyclerAdapter and works as expected) but getItemCount always return 0(!) private class MYAdapter extends FirebaseIndexRecyclerAdapter<Item, ItemHolder> { . . @Override protected void onDataChanged() { super

How to share image to social media with bitmap?

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I need to share an image from my RecyclerAdapter because the image does not initially exist, i.e. is loaded within the Activity making use of the adapter. How can I share the bitmap to social media? Every time I click share in my app it says "No apps can perform this action". feedItemView.setFeedSocialShareClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // Share to Social Media ImageView imageView = (ImageView) feedItemView.findViewById(R.id.image); Drawable mDrawable = imageView.getDrawable(); Bitmap mBitmap = ((BitmapDrawable)mDrawable).getBitmap(); String