an easy way to use multi-type listView or recyclerView in Data Binding for android developer.
First,you should use the google's Data Binding framework(If you are useing it,you could skip this step)
Then,Add this line to your denpencie group:
compile'com.databindingadapter.eis:databindingeasyadapter:1.0.0'##Useage
You should provide a itemView extends ViewModel. and bind it to your xml.
<layout xmlns:app="http://schemas.android.com/apk/res-auto">
<data>
<variable
name="itemImage"
type="com.databindingadapter.eis.databindingadapter.ItemImageType"/>
</data>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:background="#738ee4"
android:gravity="center"
android:layout_margin="10dp"
app:click="@{itemImage.click}"
android:layout_height="140dp">
<ImageView
android:layout_width="35dp"
android:layout_height="35dp"
android:src="@drawable/icon_headphone"/>
</LinearLayout>
</layout>
setBr_id() requires itemView's variable name.setLayout_id() requires itemView's xml.
public class ItemImageType extends ViewModel {
{
setLayout_id(R.layout.item_image_type);
setBr_id(BR.itemImage);
}
private View.OnClickListener click=new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(v.getContext(),"the position is"+getPositon(),Toast.LENGTH_SHORT).show();
}
};
public View.OnClickListener getClick() {
return click;
}
public void setClick(View.OnClickListener click) {
this.click = click;
}
}when you finsh those steps above,you can use it in your activity without warried about creating a baseadapter. If you want to show mutli-type in your list,creat more ’itemView‘.
In Order to use in your activity,it requires:
Step1 :Use 'ObservableArrayList'(it will updata your view automatically) to collcet those 'ItemView'(Any Class extends from ViewModel is OK);
public class MainActivityViewModel extends BaseObservable {
public ObservableArrayList<ViewModel> viewModels = new ObservableArrayList<>();
public int span=3;
}Step2 :Bind ’ObservableArrayList‘ to your recyclerView
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:RA_bind="@{main.viewModels}">Step3:Add 'ItemView' to your 'ObservableArrayList'.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActivityListViewBinding binding= DataBindingUtil.setContentView(this,R.layout.activity_list_view);
MainActivityViewModel viewModel=new MainActivityViewModel();
viewModel.viewModels.add(new ItemImageType());
viewModel.viewModels.add(new ItemTextType());
viewModel.viewModels.add(new ItemMixupType());
viewModel.viewModels.add(new ItemTextType());
viewModel.viewModels.add(new ItemTextType());
viewModel.viewModels.add(new ItemTextType());
viewModel.viewModels.add(new ItemMixupType());
viewModel.viewModels.add(new ItemImageType());
viewModel.viewModels.add(new ItemMixupType());
binding.setMain(viewModel);
}And finally,you could see it works on your project.
ListView should be used like this:
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:BA_bind="@{main.viewModels}">RecyclerView with GridLayoutManager shoule be used like this:
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:RA_bind_G="@{main.viewModels}"
app:RA_span="@{main.span}"
>RecyclerView with StaggeredGridLayoutManager shoule be used like this:
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:RA_bind_S="@{main.viewModels}"
app:RA_span="@{main.span}">you could use 'getPosition()' in 'itemView' to get this item's posititon of its' list. And you could use ’app:click’ to set an OnClickListener in your item layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:background="#738ee4"
android:gravity="center"
android:layout_margin="10dp"
app:click="@{itemImage.click}"
android:layout_height="140dp">More details,you could see my Demo
Copyright 2015 Evan Tatarka
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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