问题描述
我跟着recyclerview指导方针和建立一个我制作的应用程序,但它不滚动到底出于某种原因。我与谷歌的code片段,以及其他code段相比,它在线看不出区别。我已经发布的图片,我使用的是code。我使用的标签,因此recyclerview填充在一个片段。
应用程序看起来像什么:
适配器类:
公共类MyAdapter扩展RecyclerView.Adapter< MyAdapter.ViewHolder> {
私人列表<组>组;//提供对每个数据项意见的参考
//复杂的数据也有可能需要每个项目的多个视图,并
//您提供的所有数据项在视图中持有人的意见访问
公共类ViewHolder扩展RecyclerView.ViewHolder {
//每个数据项仅仅是在这种情况下,串
公共TextView的组名;
公众的TextView groupDate;
公众的TextView groupLocation;
公共TextView的类名; 公共ViewHolder(视图v){
超级(五);
组名=(的TextView)v.findViewById(R.id.groupName);
groupDate =(TextView中)v.findViewById(R.id.groupDate);
groupLocation =(TextView中)v.findViewById(R.id.groupLocation);
的className =(TextView中)v.findViewById(R.id.className);
}
}/ *
* TODO:完成此方法
* /
公共无效添加(INT位置,串项){ notifyItemInserted(位置);
}公共无效删除(字符串项){
INT位置= groups.indexOf(项目);
groups.remove(位置);
notifyItemRemoved(位置);
}//提供一个合适的构造函数(依赖于一种数据集)
公共MyAdapter(列表<组> groupsList){
组= groupsList;
Log.d(TEST,组数:+
Integer.toString(groups.size()));
}//创建新的视图(由布局管理器调用)
@覆盖
公共MyAdapter.ViewHolder onCreateViewHolder(ViewGroup中父母,
INT viewType){
//创建一个新视图
视图V = LayoutInflater.from(parent.getContext())膨胀(R.layout.group_view,父母,假的)。
//设置视图的大小,边距,填充和布局参数
ViewHolder VH =新ViewHolder(ⅴ);
返回VH;
}//替换视图的内容(由布局管理器调用)
@覆盖
公共无效onBindViewHolder(ViewHolder持有人,INT位置){
// - 在这个位置从数据集中获取元素
// - 与元素替换视图的内容
最后组组= groups.get(位置);
// holder.groupName.setText(group.getName());
holder.groupName.setText(group.getName());
holder.groupDate.setText(group.getFormattedDate());
holder.groupLocation.setText(group.getLocation());
holder.className.setText(group.getParent()的getName());
}//返回数据集的大小(由布局管理器调用)
@覆盖
公众诠释getItemCount(){
返回groups.size();
}}
分片类:
公共类groupsFragment扩展片段实现GroupLeaver,的Grou $ P $ {ptriever
私人RecyclerView RV;
私人列表<组>组;
私人ProgressDialog progressDialog;@覆盖
公共无效的onCreate(捆绑savedInstance){
super.onCreate(savedInstance);
Log.d(TEST,输入的onCreate);
}@覆盖
公共查看onCreateView(LayoutInflater充气器,容器的ViewGroup,捆绑savedInstanceState){
。AppMain.getController()retrieveGroups(groupsFragment.this);
Log.d(TEST,输入onCreateView);
查看rootView = inflater.inflate(R.layout.groups_fragment,集装箱,FALSE); RV =(RecyclerView)rootView.findViewById(R.id.recyclerView); rv.setLayoutManager(新LinearLayoutManager(getActivity())); Log.d(TEST,LIST的大小:+ Integer.toString(groups.size()));
MyAdapter适配器=新MyAdapter(组);
rv.setAdapter(适配器); 返回rootView;
}@覆盖
公共无效onMyGroupsFound(列表<组>组){
Log.d(TEST,输入onMyGroupsFound);
Logg.info(this.getClass(),发现%d个团体会员%S,groups.size(),User.getCurrentUser()getDisplayName());
this.groups =组;
}@覆盖
公共无效onGroupLeft(集团oldGroup){}@覆盖
公共无效onGroupLeftFailed(集团组,ParseException的E){}
}
XML的布局为recyclerview:
<?XML版本=1.0编码=UTF-8&GT?;
<的FrameLayout的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:layout_width =match_parent
机器人:layout_height =match_parent
机器人:方向=垂直
>< android.support.v7.widget.RecyclerView
机器人:ID =@ + ID / recyclerView
机器人:layout_width =match_parent
机器人:layout_height =match_parent
机器人:分=@空/>< /&的FrameLayout GT;
XML的布局为recyclerview项目:
<?XML版本=1.0编码=UTF-8&GT?;<的FrameLayout
的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
><的LinearLayout
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
机器人:填充=16DP
机器人:方向=横向> <的LinearLayout
机器人:layout_height =WRAP_CONTENT
机器人:layout_width =0dp
机器人:layout_weight =3
机器人:方向=垂直> <的TextView
机器人:ID =@ + ID /组名
机器人:layout_width =WRAP_CONTENT
机器人:layout_height =WRAP_CONTENT
机器人:文字=组名
/> <的TextView
机器人:ID =@ + ID / groupDate
机器人:layout_width =WRAP_CONTENT
机器人:layout_height =WRAP_CONTENT
机器人:文字=组日期
/> <的TextView
机器人:ID =@ + ID / groupLocation
机器人:layout_width =FILL_PARENT
机器人:layout_height =WRAP_CONTENT
机器人:文字=集团的位置
/>
< / LinearLayout中> <的LinearLayout
机器人:layout_height =WRAP_CONTENT
机器人:layout_width =0dp
机器人:layout_weight =1
机器人:方向=垂直> <的TextView
机器人:ID =@ + ID /类名
机器人:layout_width =WRAP_CONTENT
机器人:layout_height =WRAP_CONTENT
机器人:layout_gravity =中心
机器人:重力=右
机器人:文字=类名
/>
< / LinearLayout中>< / LinearLayout中>
< /&的FrameLayout GT;
感谢大家谁回答,但原来的问题是recyclerview的版本我进行编译。
previously我编写本:
编译com.android.support:recyclerview-v7:22.0.0
不过,我改成了这一点,它的工作。
编译com.android.support:recyclerview-v7:22.2.0
贷@roi的答案divon:CoordinatorLayout与RecyclerView&安培; CollapsingToolbarLayout
I followed the recyclerview guidelines and built one for the app I am making, but it does not scroll to the bottom for some reason. I compared it with google code snippets, as well as other code snippets online and can't see the difference. I have posted a picture and the code I am using. I am using tabs, therefore the recyclerview is populated in a fragment.
What the app looks like:
the adapter class:
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private List<Group> groups;
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public class ViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public TextView groupName;
public TextView groupDate;
public TextView groupLocation;
public TextView className;
public ViewHolder(View v) {
super(v);
groupName = (TextView) v.findViewById(R.id.groupName);
groupDate = (TextView) v.findViewById(R.id.groupDate);
groupLocation = (TextView) v.findViewById(R.id.groupLocation);
className = (TextView) v.findViewById(R.id.className);
}
}
/*
* TODO: finish this method
*/
public void add(int position, String item) {
notifyItemInserted(position);
}
public void remove(String item) {
int position = groups.indexOf(item);
groups.remove(position);
notifyItemRemoved(position);
}
// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(List<Group> groupsList) {
groups = groupsList;
Log.d("TEST", "Number of Groups: " +
Integer.toString(groups.size()));
}
// Create new views (invoked by the layout manager)
@Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.group_view, parent, false);
// set the view's size, margins, paddings and layout parameters
ViewHolder vh = new ViewHolder(v);
return vh;
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
// - get element from your dataset at this position
// - replace the contents of the view with that element
final Group group = groups.get(position);
// holder.groupName.setText(group.getName());
holder.groupName.setText(group.getName());
holder.groupDate.setText(group.getFormattedDate());
holder.groupLocation.setText(group.getLocation());
holder.className.setText(group.getParent().getName());
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return groups.size();
}
}
The Fragment class:
public class groupsFragment extends Fragment implements GroupLeaver, GroupRetriever {
private RecyclerView rv;
private List<Group> groups;
private ProgressDialog progressDialog;
@Override
public void onCreate(Bundle savedInstance){
super.onCreate(savedInstance);
Log.d("TEST", "Entered onCreate");
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
AppMain.getController().retrieveGroups(groupsFragment.this);
Log.d("TEST", "Entered onCreateView");
View rootView = inflater.inflate(R.layout.groups_fragment, container, false);
rv = (RecyclerView) rootView.findViewById(R.id.recyclerView);
rv.setLayoutManager(new LinearLayoutManager(getActivity()));
Log.d("TEST", "Size of LIST: " + Integer.toString(groups.size()));
MyAdapter adapter = new MyAdapter(groups);
rv.setAdapter(adapter);
return rootView;
}
@Override
public void onMyGroupsFound(List<Group> groups) {
Log.d("TEST", "Entered onMyGroupsFound");
Logg.info(this.getClass(), "Found %d groups for member %s", groups.size(), User.getCurrentUser().getDisplayName());
this.groups = groups;
}
@Override
public void onGroupLeft(Group oldGroup) {
}
@Override
public void onGroupLeftFailed(Group group, ParseException e) {
}
}
The xml layout for the recyclerview:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="@null"/>
</FrameLayout>
The xml layout for the recyclerview items:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"
android:orientation="horizontal">
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="0dp"
android:layout_weight="3"
android:orientation="vertical">
<TextView
android:id="@+id/groupName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Group Name"
/>
<TextView
android:id="@+id/groupDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Group Date"
/>
<TextView
android:id="@+id/groupLocation"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Group Location"
/>
</LinearLayout>
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="0dp"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:id="@+id/className"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="right"
android:text="Class Name"
/>
</LinearLayout>
</LinearLayout>
</FrameLayout>
Thanks to everyone who responded, but turns out the problem was the version of recyclerview I was compiling.
Previously I was compiling this:compile 'com.android.support:recyclerview-v7:22.0.0'
But I changed it to this and it worked.compile 'com.android.support:recyclerview-v7:22.2.0'
Credits to @roi divon for the answer: CoordinatorLayout with RecyclerView & CollapsingToolbarLayout
这篇关于RecyclerView不滚动至底部的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!