MVP+OKHTTP+RecyclerView

最新推荐文章于 2021-05-28 16:04:51 发布

原创最新推荐文章于 2021-05-28 16:04:51 发布 · 266 阅读

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CC 4.0 BY-SA版权

本文介绍了一个安卓应用的具体实现过程，包括依赖配置、Model层的数据获取、View层的UI展示及刷新逻辑、Presenter层的业务逻辑处理，以及Adapter层的数据绑定等关键技术环节。

依赖：

implementation fileTree(include: ['*.jar'], dir: 'libs')

implementation 'androidx.appcompat:appcompat:1.0.0-alpha1'

implementation 'androidx.recyclerview:recyclerview:1.0.0-alpha1'
implementation 'androidx.constraintlayout:constraintlayout:1.1.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test:runner:1.1.0-alpha3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-alpha3'
implementation 'com.squareup.retrofit2:retrofit:2.4.0'
implementation 'com.squareup.okhttp3:okhttp:3.11.0'
implementation 'com.github.bumptech.glide:glide:4.7.1'
implementation 'com.github.userswlwork:pull-to-refresh:1.0.0'
implementation 'com.google.code.gson:gson:2.8.5'
implementation 'com.github.asne.facebook:facebook:3.17.2'

Model层：

ModleHome类：

public class ModleHome {
public static final String TAG="ModelHome";

public void getData( final ImodleHome ModelListener){

// 拦截器addInterceptor.addInterceptor(new LogInterceptor())
OkHttpClient builder = new OkHttpClient.Builder().build();

final Request request = new Request.Builder().url("https://www.zhaoapi.cn/product/getProducts?pscid=1").build();
builder.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
ModelListener.callBackFailure(1);
}

@Override
public void onResponse(Call call, Response response) throws IOException {
String result = response.body().string();
Log.i(TAG, "onResponse: "+result.toString());

Gson gson=new Gson();
HomeBean qbean = gson.fromJson(result, HomeBean.class);
ModelListener.callBackSuccess(qbean);
}
});
}

}

ImodleHome类：

public interface ImodleHome {
public void callBackSuccess(HomeBean hbean);
public void callBackFailure(int code);

}

view层

IhomeView类

public interface IhomeView {
public void callBackSuccess(HomeBean bean);
public void callBackFailure(int code);

}

Preasenter层

IhomePreasenter类：

public class HomePresenter implements IhomePreasenter {

private IhomeView ihomeView;
private ModleHome modleHome;

public HomePresenter(IhomeView ihomeView) {
this.ihomeView=ihomeView;
this.modleHome=new ModleHome();
}
public void getdatas(){
modleHome.getData(new ImodleHome() {
@Override
public void callBackSuccess(HomeBean hbean) {
ihomeView.callBackSuccess(hbean);
}

@Override
public void callBackFailure(int code) {
ihomeView.callBackFailure(code);
}
});
}
@Override
public void ondestroys() {
if (ihomeView!=null){
ihomeView=null;
}
}
}

IhomePreasenter类

public interface IhomePreasenter {
void ondestroys();

}

Adapter层

HomeAdapter类

public class HomeAdapter extends RecyclerView.Adapter<HomeAdapter.TextHolder>{
Context mContext;
List<HomeBean.DataBean> homeBean;

//构造函数
public HomeAdapter(Context mcontext,List<HomeBean.DataBean> homeBean) {
this.homeBean=homeBean;
this.mContext=mcontext;

}
//创建视图
@NonNull
@Override
public TextHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
//获取子布局
LayoutInflater inflater = LayoutInflater.from(mContext);
View view = inflater.inflate(R.layout.item, parent, false);

return new TextHolder(mContext,view);
}
//绑定数据和视图
@Override
public void onBindViewHolder(TextHolder textHolder, int position) {

String mtext = homeBean.get(position).getTitle();

String mpath = homeBean.get(position).getImages().split("\\|")[0];

textHolder.bindText(mtext,mpath);
}
//统计条目数量
@Override
public int getItemCount() {
return homeBean.size();
}

//通过内部类
public static class TextHolder extends RecyclerView.ViewHolder{

private TextView mTextView;
private ImageView mImageView;
private Context context;

public TextHolder(Context mcontext,View itemView) {
super(itemView);
this.context=mcontext;

mTextView = (TextView) itemView.findViewById(R.id.rcv_title);
mImageView=(ImageView) itemView.findViewById(R.id.rcv_img);

}
public void bindText(String mText, String path){
mTextView.setText(mText);

Glide.with(context).load(path).into(mImageView);
}
}

}

MainActivity

public class MainActivity extends AppCompatActivity implements IhomeView {

private HomePresenter homePresenter;
private PullToRefreshScrollView pull_to_refresh;
private RecyclerView recyclerview;
private List<HomeBean.DataBean> data;
private HomeAdapter homeAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}

private void init() {
homePresenter = new HomePresenter(this);
homePresenter.getdatas();
pull_to_refresh = findViewById(R.id.pull_to_refresh);
recyclerview = findViewById(R.id.recyclerview);
recyclerview.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));

pull_to_refresh.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ScrollView>() {
//刷新
@Override
public void onPullDownToRefresh(PullToRefreshBase<ScrollView> pullToRefreshBase) {

homePresenter.getdatas();
pull_to_refresh.onRefreshComplete();

}
//加载
@Override
public void onPullUpToRefresh(PullToRefreshBase<ScrollView> pullToRefreshBase) {

homePresenter.getdatas();
pull_to_refresh.onRefreshComplete();

}
});

}

@Override
public void callBackSuccess(final HomeBean qbean) {
data = qbean.getData();
if (data!=null){
runOnUiThread(new Runnable() {
@Override
public void run() {
homeAdapter = new HomeAdapter(MainActivity.this, data);
recyclerview.setAdapter(homeAdapter);
pull_to_refresh.onRefreshComplete();
}
});
}

}

@Override
public void callBackFailure(int code) {

}

}

activity_main:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">

<com.handmark.pulltorefresh.library.PullToRefreshScrollView
android:id="@+id/pull_to_refresh"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent">

</androidx.recyclerview.widget.RecyclerView>

</com.handmark.pulltorefresh.library.PullToRefreshScrollView>

</LinearLayout>

子布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="wrap_content">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="10px">

<ImageView
android:id="@+id/rcv_img"
android:layout_width="150px"
android:layout_height="150px" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="10px">
<TextView
android:id="@+id/rcv_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="每个中秋都不能简单"
android:padding="10px"/>
<TextView
android:id="@+id/rcv_price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10px"
android:text="￥99.99"/>

</LinearLayout>
</LinearLayout>

</LinearLayout>