标题这节讲一下recyclerview的数据绑定
首先要准备recyclerview的item渲染layout xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
>
<data>
<import type="com.freestyle.myapplication.common.BindingConverter"/>
<variable
name="data"
type="com.freestyle.myapplication.pojo.User" />
<variable
name="event"
type="com.freestyle.myapplication.activity.RecyclerViewActivity.EventListener" />
</data>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/user_name1"
android:onClick="@{()->{event.editUser(data);}}"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@{data.userName}"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="Phone: "/>
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@={data.phone}"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="Age: "/>
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@={BindingConverter.int2Str(data.age)}"
/>
<TextView
android:layout_width="0dp"
android:layout_weight="1"
android:visibility="invisible"
android:layout_height="wrap_content" />
<Button
android:layout_width="34dp"
android:layout_height="wrap_content"
android:onClick="@{()->{event.deleteUser(data);}}"
android:text="X" />
</LinearLayout>
</layout>
再准备AdapterHolder, 很简单
public class BindingViewAdapterHolder<T
extends ViewDataBinding> extends RecyclerView.ViewHolder {
private T binding
;
public T
getBinding(){
return binding
;
}
public BindingViewAdapterHolder(@NonNull T binding
) {
super(binding
.getRoot());
this.binding
=binding
;
}
}
准备recyclerview的适配器RecyclerViewAdapter
*
com
.freestyle
.myapplication
.adapter
Created by rocklee
, 2020/6/29
***/
public class RecyclerViewAdapter extends RecyclerView.Adapter<BindingViewAdapterHolder> {
private List
<User> list
;
private Context context
;
private LayoutInflater layoutInflater
;
private RecyclerViewActivity
.EventListener eventListener
;
public RecyclerViewAdapter(List
<User> list
, Context context
,RecyclerViewActivity
.EventListener eventListener
) {
this.list
= list
;
this.context
= context
;
this.layoutInflater
= ((Activity
)context
).getLayoutInflater();
this.eventListener
=eventListener
;
}
@NonNull
@Override
public BindingViewAdapterHolder
onCreateViewHolder(@NonNull ViewGroup viewGroup
, int i
) {
ViewDataBinding dataBinding
= DataBindingUtil
.inflate(layoutInflater
, R
.layout
.item_layout
,viewGroup
,false);
dataBinding
.setVariable(BR
.event
,eventListener
);
return new BindingViewAdapterHolder(dataBinding
);
}
@Override
public void onBindViewHolder(@NonNull BindingViewAdapterHolder bindingViewAdapterHolder
, int i
) {
User it
=list
.get(i
);
ViewDataBinding binding
=bindingViewAdapterHolder
.getBinding();
binding
.setVariable(BR
.data
,it
);
binding
.executePendingBindings();
}
@Override
public int getItemCount() {
return list
.size();
}
public RecyclerViewActivity
.EventListener
getEventListener() {
return eventListener
;
}
}
准备包含recyclerview的activity xml
<data>
<variable
name="event"
type="com.freestyle.myapplication.activity.RecyclerViewActivity.EventListener" />
</data>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Add user"
android:onClick="@{event::addItem}"/>
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:id="@+id/userList"
android:layout_height="0dp"
android:layout_weight="1">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
编写recyclerviewActivity的oncreate代码
@Override
protected void onCreate(Bundle savedInstanceState
) {
super.onCreate(savedInstanceState
);
users
=new ArrayList<>();
for (int i
=0;i
<100;i
++){
User user
=new User("user "+String
.valueOf(i
),"086-0"+String
.valueOf(i
+1));
user
.setCates(Config
.cate
);
user
.setSex(Math
.random()*10>5);
user
.setIconIndex((int)(Math
.random()*2));
user
.setCateIndex((int)(Math
.random()*4));
user
.setAge((int)(Math
.random()*30));
users
.add(user
);
}
recyclerViewAdapter
=new RecyclerViewAdapter(users
,this,new EventListener());
binding
= DataBindingUtil
.setContentView(this, R
.layout
.activity_recycler_view
);
binding
.userList
.setLayoutManager( new LinearLayoutManager( this ));
binding
.userList
.setAdapter(recyclerViewAdapter
);
binding
.setVariable(BR
.event
,recyclerViewAdapter
.getEventListener());
}
跑起来
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