android下加这个
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
dataBinding {
enabled = true
}
把项目的 theme
的 parent
指向 QMUI.Compat
,至此,QMUI 可以正常工作。
依赖
def lifecycle_version = "2.2.0"
def arch_version = "2.1.0"
// ViewModel
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
// LiveData
implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
// Lifecycles only (without ViewModel or LiveData)
implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"
implementation 'com.github.JiJiBo:BugUtils:1.0.8'
// Saved state module for ViewModel
implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:$lifecycle_version"
// alternately - if using Java8, use the following instead of lifecycle-compiler
implementation "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"
// optional - helpers for implementing LifecycleOwner in a Service
implementation "androidx.lifecycle:lifecycle-service:$lifecycle_version"
// optional - ProcessLifecycleOwner provides a lifecycle for the whole application process
implementation "androidx.lifecycle:lifecycle-process:$lifecycle_version"
// optional - ReactiveStreams support for LiveData
implementation "androidx.lifecycle:lifecycle-reactivestreams-ktx:$lifecycle_version"
implementation 'com.github.JiJiBo:BugUtils:1.0.8'
implementation 'androidx.recyclerview:recyclerview:1.1.0'
implementation 'com.qmuiteam:qmui:2.0.0-alpha10'
implementation 'io.reactivex.rxjava3:rxandroid:3.0.0'
implementation 'io.reactivex.rxjava3:rxjava:3.0.0'
implementation 'com.squareup.okhttp3:okhttp:3.10.0'
implementation 'com.google.code.gson:gson:2.8.6'
implementation 'com.github.bumptech.glide:glide:4.11.0'
annotationProcessor 'com.github.bumptech.glide:compiler:4.11.0'
allprojects {
repositories {
maven{ url 'http://maven.aliyun.com/nexus/content/groups/public'}
jcenter()
google()
maven { url 'https://jitpack.io' }
}
}
这是在安卓中使用jectpack,来实现recyclerview,所以就是把数据用条目展示出来
首先实现item所依存的bean,也就是传给adapter的arraylist
public class Student {
private int age;
private String name;
public Student() {
}
public Student(int age, String name) {
this.age = age;
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
然后再写item的布局文件
这里引进一个东西没有说,就是
DealUtils
他长这样
package com.zcf.myshujubangding;
public class DealUtils {
public static String toString(int age) {
return age+"";
}
}
就是把数字转为字符串这个工具类可以被引进xml
下面展示适配器怎么写
public class AccountDetailAdapter extends Adapter {
private ArrayList datas;
public AccountDetailAdapter(ArrayList datas) {
this.datas = datas;
}
@NonNull
@Override
public FenLeiViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
//这里注意
ItemAccountDetailBinding inflate = DataBindingUtil.inflate(LayoutInflater.from(BugApp.getContext()), R.layout.item_account_detail, parent, false);
return new FenLeiViewHolder(inflate.getRoot());
}
@Override
public void onBindViewHolder(@NonNull FenLeiViewHolder holder, final int position) {
//这里注意
ItemAccountDetailBinding bind = DataBindingUtil.bind(holder.itemView);
bind.setStudent(datas.get(position));
bind.executePendingBindings();
}
@Override
public int getItemCount() {
return datas.size();
}
protected class FenLeiViewHolder extends RecyclerView.ViewHolder {
public FenLeiViewHolder(@NonNull View itemView) {
super(itemView);
}
}
}
下面的工作就是从网络获取数据,存入recycleview
数据用在ViewModel中获取,里面有个获取假数据的方法
public class MainViewModel extends ViewModel {
private MutableLiveData> students;
public MainViewModel() {
}
public MutableLiveData> getStudents() {
if (students == null) {
students = new MutableLiveData<>();
students.setValue(new ArrayList());
}
return students;
}
public void getFalseData() {
ArrayList ss = new ArrayList<>();
ss.add(new Student(12, "f"));
ss.add(new Student(32, "d"));
ss.add(new Student(12, "e3"));
ss.add(new Student(322, "fde"));
students.getValue().addAll(ss);
}
}
还没把主页面的布局文件拿出来
现在拿出来
里面引入了两个数据,recycleview里有个属性,把引入的数据放在里面,这个属性会在恰当的时刻做什么呢
public class RvAdapter {
@BindingAdapter("bindData")
public static void bindAdapter(RecyclerView rv, ArrayList datas) {
rv.setAdapter(new AccountDetailAdapter(datas));
rv.setLayoutManager(new LinearLayoutManager(rv.getContext()));
rv.addItemDecoration(new DividerItemDecoration(rv.getContext(), DividerItemDecoration.VERTICAL));
}
}
你看,他会把传入的数据和recycleview绑定在一起
重要的看看主页面
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
//得到viewmodel
val get = ViewModelProviders.of(this).get(MainViewModel::class.java)
//得到布局Binding
val contentView =
DataBindingUtil.setContentView(this, R.layout.activity_main)
//初始化recycleview
contentView.rvData = get.students.value
//recycleview数据更新的监听
get.students.observe(this, object : Observer> {
override fun onChanged(t: ArrayList?) {
if (contentView.rv.adapter != null) {
contentView.rv.adapter!!.notifyDataSetChanged()
}
}
})
//一个获取数据的方法
get.getFalseData()
}
}