Android XRcyclerView刷新，加载更多

淩亂°似流年 2022-06-06 00:55 157阅读 0赞

效果图:

![Center][]

## 1.导入依赖: ##

/*xrecyclerview*/
        compile 'com.jcodecraeer:xrecyclerview:1.3.2'
    //    imageolader
        compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
    //    logger日志的使用
        compile 'com.orhanobut:logger:2.1.1'
    //    Okhttp请求以及Gson解析
        compile 'com.squareup.okio:okio:1.5.0'
        compile 'com.squareup.okhttp3:okhttp:3.2.0'
        compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'
        compile 'com.google.code.gson:gson:2.8.2'

## 2.权限: ##

<uses-permission android:name="android.permission.INTERNET"/>
        <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
        <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>

## 3.布局文件activity\_main.xml ##

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/activity_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        tools:context="xuejian.baway.com.MainActivity">
    
        <com.jcodecraeer.xrecyclerview.XRecyclerView
            android:id="@+id/xRecyclerview"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
    
        </com.jcodecraeer.xrecyclerview.XRecyclerView>
    </RelativeLayout>

## 4.子条目item.xml： ##

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical" android:layout_width="match_parent"
        android:layout_height="match_parent">
    
        <ImageView
            android:id="@+id/img"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:src="@mipmap/ic_launcher"
            />
        <TextView
            android:id="@+id/title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="标题"
            />
    </LinearLayout>

## 5.MainActivity代码: ##

public class MainActivity extends AppCompatActivity {
    
        String path = "http://www.yulin520.com/a2a/impressApi/news/mergeList?sign=C7548DE604BCB8A17592EFB9006F9265&pageSize=8&gender=2&ts=1871746850&page=";
        private XRecyclerView xRecyclerview;
        int page=1;
        private ArrayList<SuperClass.DataBean> list;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            xRecyclerview = (XRecyclerView) findViewById(R.id.xRecyclerview);
            //允许刷新，加载更多
            xRecyclerview.setPullRefreshEnabled(true);
            xRecyclerview.setLoadingMoreEnabled(true);
            list = new ArrayList<>();
            initView();
            //设置布局管理器
            xRecyclerview.setLayoutManager(new LinearLayoutManager(this));
    
        }
    
        private void initView() {
            xRecyclerview.setLoadingListener(new XRecyclerView.LoadingListener() {
                @Override
                public void onRefresh() {
                    Toast.makeText(MainActivity.this,"刷新...."+page,Toast.LENGTH_SHORT).show();
                    list.clear();
                    page=1;
                    getData(path,1);
                    xRecyclerview.refreshComplete();
                }
    
                @Override
                public void onLoadMore() {
    
                    page++;
                    Toast.makeText(MainActivity.this,"加载更多....第几页"+page,Toast.LENGTH_SHORT).show();
                    getData(path,page);
                    xRecyclerview.loadMoreComplete();
                }
            });
            if (page==1){
                getData(path,page);
            }
        }
    
        public void getData(String m,int p) {
    
            OkHttp3Utils.getInstance().doGet(m+p, new GsonObjectCallback<SuperClass>() {
    
                private List<SuperClass.DataBean> data;
                //ui操作
                @Override
                public void onUi(SuperClass superClass) {
                    data = superClass.getData();
                    //将请求到的数据添加到集合
                    list.addAll(data);
                    Toast.makeText(MainActivity.this,"请求到了"+list.size(),Toast.LENGTH_SHORT).show();
                    MyAdapter myAdapter = new MyAdapter(MainActivity.this, list);
                    if (myAdapter!=null){
                        xRecyclerview.setAdapter(myAdapter);
                    }else{
                        Toast.makeText(MainActivity.this,"空的"+list.size(),Toast.LENGTH_SHORT).show();
                    }
                }
                //失败
                @Override
                public void onFailed(Call call, IOException e) {
    
                }
            });
        }
    }

## 6.适配器: ##

public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{
    
    
        Context mcontext;
        ArrayList<SuperClass.DataBean>  mlist;
    
        public MyAdapter(Context mcontext, ArrayList<SuperClass.DataBean> mlist) {
            this.mcontext = mcontext;
            this.mlist = mlist;
        }
    
        @Override
        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, null);
            MyViewHolder myViewHolder = new MyViewHolder(view);
            return myViewHolder;
        }
    
        @Override
        public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
            ((MyViewHolder)holder).title.setText(mlist.get(position).getTitle());
            ImageLoader.getInstance().displayImage(mlist.get(position).getImg(), ((MyViewHolder)holder).img);
        }
    
    
        @Override
        public int getItemCount() {
            return mlist.size();
        }
    
    
        class MyViewHolder extends RecyclerView.ViewHolder{
    
            public ImageView img;
            public TextView title;
    
            public MyViewHolder(View itemView) {
                super(itemView);
                img = (ImageView) itemView.findViewById(R.id.img);
                title = (TextView) itemView.findViewById(R.id.title);
            }
        }
    }

## 7.此处用到的ImageLoader自己建个MyApp： ##

不要忘了在清单文件里边注册myapp;

public class MyApp extends Application{
    
            public static MyApp mInstance;
    
            @Override
            public void onCreate() {
                super.onCreate();
                mInstance=this;//初始化imageLoader
                ImageLoaderConfiguration configuration = ImageLoaderConfiguration.createDefault(getApplicationContext());
                ImageLoader.getInstance().init(configuration);
            }
            public static MyApp getInstance() {
                return mInstance;
            }
    }

ps：此处用到的okhttp3utils工具类:关于XRecyclerview可以看这里：http://www.jcodecraeer.com/a/opensource/2015/1126/3723.html

[Center]: /images/20220606/6ba34fd62fc44aacbbdbff4822b4bd07.png