XUtils+TabLayout获取数据

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首先要导包，一个Xutils包一个TabLayout包

compile 'org.xutils:xutils:3.5.0'compile 'com.android.support:design:26.0.0-alpha1'

Manieat里面一共两处，加权限以及关联

android:name=".App"权限自己添加

然后是布局文件

Activity_main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent"android:orientation="vertical"    tools:context="test.com.week1.MainActivity">    <android.support.design.widget.TabLayout        android:id="@+id/tablayout"        android:layout_width="match_parent"        android:layout_height="wrap_content"        app:tabIndicatorHeight="1dp"        app:tabIndicatorColor="@color/colorAccent"        app:tabSelectedTextColor="@color/colorPrimary"        app:tabTextColor="#2de630"        app:tabMode="scrollable"    />    <android.support.v4.view.ViewPager        android:id="@+id/viewpager"        android:layout_width="match_parent"        android:layout_marginTop="3dp"        android:layout_height="match_parent"/></LinearLayout>

my_fragment.xml （因为方法不同，这里就写了一个fragment布局，可以重复利用）

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:orientation="vertical"    android:layout_height="match_parent">    <ListView        android:id="@+id/lv"        android:layout_width="match_parent"        android:layout_height="match_parent"/></LinearLayout>

item.xml （这个是fragment里面的item项的布局）

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <TextView        android:id="@+id/name"        android:layout_width="match_parent"        android:layout_height="wrap_content"/>    <ImageView        android:id="@+id/image"        android:layout_width="200dp"        android:layout_height="160dp"/></LinearLayout>

App类也就是实例化Xutils

public class App extends Application{    @Override    public void onCreate() {        super.onCreate();        x.Ext.init(this);        x.Ext.setDebug(BuildConfig.DEBUG);    }}

还有两个封装类就不往这里写了，一个是TabLayout标题的封装类，因为标题是从网络上获取的所以要封装起来，另一个是fragment内容的封装类

两个类必须要封装好我这里标题类名字为DataTab，内容类为Data，下面会用到，看的同时不要混淆

MainActivity 主要用于TabLayout标题以及跟ViewPage的联动

package test.com.week1;import android.os.Bundle;import android.support.design.widget.TabLayout;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentPagerAdapter;import android.support.v4.view.ViewPager;import android.support.v7.app.AppCompatActivity;import com.google.gson.Gson;import org.xutils.common.Callback;import org.xutils.http.RequestParams;import org.xutils.view.annotation.ContentView;import org.xutils.view.annotation.ViewInject;import org.xutils.x;import java.util.List;@ContentView(R.layout.activity_main)public class MainActivity extends AppCompatActivity {    @ViewInject(R.id.tablayout)    private TabLayout tabLayout;    @ViewInject(R.id.viewpager)    private ViewPager viewPager;    private Gson gson;    private List<DataTab.TngouBean> listTabs;    private MyFragment[] fragments;        @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        x.view().inject(this);        gson = new Gson();                loadData();    }    private void loadData() {        RequestParams params = new RequestParams("http://www.tngou.net/api/top/classify");        x.http().get(params, new Callback.CommonCallback<String>() {            @Override            public void onSuccess(String result) {                DataTab tab = gson.fromJson(result,DataTab.class);                listTabs = tab.getTngou();                initTab();            }            @Override            public void onError(Throwable ex, boolean isOnCallback) {            }            @Override            public void onCancelled(CancelledException cex) {            }            @Override            public void onFinished() {            }        });    }    private void initTab() {        for(DataTab.TngouBean bean:listTabs){            tabLayout.addTab(tabLayout.newTab().setText(bean.getName()));        }        fragments = new MyFragment[listTabs.size()];        viewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {            @Override            public Fragment getItem(int position) {               if(fragments[position] == null){                   MyFragment my = MyFragment.getInstance(listTabs.get(position).getId());                   fragments[position] = my;               }                return fragments[position];            }            @Override            public int getCount() {                return listTabs.size();            }            @Override            public CharSequence getPageTitle(int position) {                return listTabs.get(position).getName();            }        });        tabLayout.setupWithViewPager(viewPager);    }}

MyFragment 用于fragment内容的展示这里展示时用的listview 适配器写成了内部类，在最下面

package test.com.week1;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;import com.google.gson.Gson;import org.xutils.common.Callback;import org.xutils.http.RequestParams;import org.xutils.view.annotation.ContentView;import org.xutils.view.annotation.ViewInject;import org.xutils.x;import java.util.ArrayList;import java.util.List;@ContentView(R.layout.my_fragment)public class MyFragment extends Fragment{    @ViewInject(R.id.lv)    private ListView lv;    private int id;    private List<Data.TngouBean> list = new ArrayList<>();    private MyAdapter adapter;    public static MyFragment getInstance(int id) {       MyFragment myFragment = new MyFragment();        Bundle bundle = new Bundle();        bundle.putInt("id",id);        myFragment.setArguments(bundle);        return myFragment;    }    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        View view = x.view().inject(this,inflater,container);        id = getArguments().getInt("id");        adapter = new MyAdapter();        lv.setAdapter(adapter);        loadData();        return view;    }    private void loadData() {        RequestParams requestParams=new RequestParams("http://www.tngou.net/api/top/list");        requestParams.addQueryStringParameter("page","1");        requestParams.addQueryStringParameter("rows","10");        requestParams.addQueryStringParameter("id",id+"");        x.http().get(requestParams, new Callback.CommonCallback<String>() {            @Override            public void onSuccess(String result) {                Data data=new Gson().fromJson(result,Data.class);                list.addAll(data.getTngou());                adapter.notifyDataSetChanged();            }            @Override            public void onError(Throwable ex, boolean isOnCallback) {            }            @Override            public void onCancelled(CancelledException cex) {            }            @Override            public void onFinished() {            }        });    }    class MyAdapter extends BaseAdapter{        @Override        public int getCount() {            return list.size();        }        @Override        public Object getItem(int position) {            return null;        }        @Override        public long getItemId(int position) {            return 0;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            ViewHolder holder = null;            if(convertView == null)            {                holder = new ViewHolder();                convertView = View.inflate(getContext(),R.layout.item,null);                x.view().inject(holder,convertView);                convertView.setTag(holder);            }else{                holder = (ViewHolder)convertView.getTag();            }            Data.TngouBean bean = list.get(position);            holder.name.setText(bean.getTitle());            x.image().bind(holder.image,"http://tnfs.tngou.net/image"+bean.getImg());            return convertView;        }    }    class ViewHolder{        @ViewInject(R.id.name)        TextView name;        @ViewInject(R.id.image)        ImageView image;    }}

效果图

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