android-recyclerview

问题 In my application am displaying 20 multiple choice questions with the help of RecyclerView . If I change the value of first RadioGroup and scrolls down, again scrolls up removing the selected value in RecycelarView and also i want to use that selected RadioButton value further, I was also checked link1 but i did't understood what he is doing. Here is my sample code snippet let me know if you need any clarification. package com.testing.survey; import java.util.List; import android.annotation

问题 I have set the negative margin for items like this:- ItemDecoration.java public class ItemDecorator extends RecyclerView.ItemDecoration { private final int mSpace; public ItemDecorator(int space) { this.mSpace = space; } @Override public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) { int position = parent.getChildAdapterPosition(view); if (position != 0) outRect.top = mSpace; } } MainActivity.java recyclerView.setLayoutManager(new

问题 I have set the negative margin for items like this:- ItemDecoration.java public class ItemDecorator extends RecyclerView.ItemDecoration { private final int mSpace; public ItemDecorator(int space) { this.mSpace = space; } @Override public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) { int position = parent.getChildAdapterPosition(view); if (position != 0) outRect.top = mSpace; } } MainActivity.java recyclerView.setLayoutManager(new

问题 I am trying to make an app that will be loading news from the network and will be updating dynamically. I am using a RecyclerView and CardView to display the content. I use Jsoup to parse sites. I don't think that my code is needed because my question is more theoretical than practical. I want to understand the process of dynamic updating using notifyDataSetChanged() . In my main activity I get all the headers and add them to list. But I need to wait untill all the items are loaded to start

问题 I am trying to make an app that will be loading news from the network and will be updating dynamically. I am using a RecyclerView and CardView to display the content. I use Jsoup to parse sites. I don't think that my code is needed because my question is more theoretical than practical. I want to understand the process of dynamic updating using notifyDataSetChanged() . In my main activity I get all the headers and add them to list. But I need to wait untill all the items are loaded to start

问题 I have some general programming knowledge, but I am new to android developing, and I have started with RecyclerView and I have used cardview too. But in some cases the title there is too long and I just want to add a fading edge. I have searched in here but I couldn't find anything. So I tried it myself, but I couldn't get it working. I have used it outside the RecyclerView too, but still the same result. The code I am using. <TextView android:layout_width="wrap_content" android:layout_height

问题 In my build.gradle file I have the support library dependencies: compile "com.android.support:appcompat-v7:22.2.0" compile "com.android.support:recyclerview-v7:22.2.0" compile "com.android.support:design:22.2.0" I also have dependencies for espresso tests: androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2' androidTestCompile 'com.android.support.test.espresso:espresso-intents:2.2' Everything runs fine at this point, but when I add the dependency for espresso-contrib I

问题 It's maybe a discussion not a question. Normal way to implement multiple types As you know, if we want to implement multiple types in RecyclerView , we should provide multiple CustomViewHolder extending RecyclerView.ViewHolder . For exmpale, class TextViewHolder extends RecyclerView.ViewHolder{ TextView textView; } class ImageViewHolder extends RecyclerView.ViewHolder{ ImageView imageView; } Then we have to override getItemViewType .And in onCreateViewHolder to construct TextViewHolder or

问题 I have a RecyclerViewAdapter which I have called MyAdapter and there I set for a Bookmark: ID, Name, Icon, SearchUrl. I am able to show all of them but for the icon it works only from Drawable . I don't want to convert Bitmap to Drawable I only want take favicon of url which is saved in DB. I want to take the favicon from the Bitmap because the icon depens from which SearchUrl it is gaven for example. SearchUrl = "https://www.youtube.com" In the icon I need to show the favicon of the youtube.

问题 I want to change my ListView I currently have over to use RecyclerView so I can make use of StaggeredGridLayoutManager but RecyclerView does not have the ability to add a header like ListView. Usually with a ListView I set an empty view in the header and put the image below the listview and translate the bottom image with the scrolling of the list to create the Parallax effect. So with out a header how can I create the same parallax effect with RecyclerView ? 回答1: So today I tried to archive