今日头条

最新推荐文章于 2022-03-12 12:19:28 发布

四夕520

最新推荐文章于 2022-03-12 12:19:28 发布

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本文链接：https://blog.youkuaiyun.com/Luokaiqin520/article/details/79078827

版权

1.布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    tools:context="com.example.dell.a1511q_luokaiqin.MainActivity">

    <android.support.v4.view.ViewPager
        android:layout_marginTop="50dp"
        android:id="@+id/my_vp"
        android:layout_width="match_parent"
        android:layout_height="500dp" />

    <RadioGroup
        android:id="@+id/my_rg"
        android:layout_alignBottom="@id/my_vp"
        android:layout_centerHorizontal="true"
        android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <RadioButton
            android:id="@+id/btn_01"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:checked="true"
            android:layout_height="wrap_content" />
        <RadioButton
            android:id="@+id/btn_02"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
        <RadioButton
            android:id="@+id/btn_03"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
        <RadioButton
            android:id="@+id/btn_04"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
        <RadioButton
            android:id="@+id/btn_05"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
    </RadioGroup>

    <Button
        android:id="@+id/btn_tz"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/my_rg"
        android:layout_marginTop="50dp"
        android:layout_marginRight="50dp"
        android:visibility="invisible"
        android:layout_alignParentRight="true"
        android:text="跳转"/>

</RelativeLayout>

2.MainActivity

package com.example.dell.a1511q_luokaiqin;

import android.content.Intent;
import android.os.Handler;
import android.os.Message;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioGroup;
import com.example.dell.a1511q_luokaiqin.adapter.MyimgAdapter;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private Button btn_tz;
    private ViewPager viewPager;
    private RadioGroup radioGroup;
    private List<String> list;
/*    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            //获取当前页面的值
            int item = viewPager.getCurrentItem();
            item++;
            viewPager.setCurrentItem(item);
            //发送延迟消息实现无限轮播
            handler.sendEmptyMessageDelayed(0,1000);
        }
    };*/

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

        //找到资源控件的ID
        btn_tz = findViewById(R.id.btn_tz);
        viewPager = findViewById(R.id.my_vp);
        radioGroup = findViewById(R.id.my_rg);

        //初始化图片数据
        initimgData();

        //创建图片自动轮播适配器
        setimgAdapter();

        //设置图片默认显示在中间
        //viewPager.setCurrentItem(list.size()*10000);

       /* //发送延迟消息实现无限轮播
        handler.sendEmptyMessageDelayed(0,1000);*/

        //设置图片与圆圈绑定
       setvpbtn();

        //给跳转按钮设置点击事件
        setbutdz();
    }

    private void setbutdz() {
        btn_tz.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this, Main2Activity.class);
                startActivity(intent);
                finish();
            }
        });
    }

    private void setvpbtn() {
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                switch (position%list.size()){
                    case 0:
                        radioGroup.check(R.id.btn_01);
                        btn_tz.setVisibility(View.INVISIBLE);
                        break;
                    case 1:
                        radioGroup.check(R.id.btn_02);
                        btn_tz.setVisibility(View.INVISIBLE);
                        break;
                    case 2:
                        radioGroup.check(R.id.btn_03);
                        btn_tz.setVisibility(View.INVISIBLE);
                        break;
                    case 3:
                        radioGroup.check(R.id.btn_04);
                        btn_tz.setVisibility(View.INVISIBLE);
                        break;
                    case 4:
                        radioGroup.check(R.id.btn_05);
                        btn_tz.setVisibility(View.VISIBLE);
                        break;

                    default:
                        break;
                }

            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });
    }

    private void setimgAdapter() {
        MyimgAdapter myimgAdapter = new MyimgAdapter(MainActivity.this, list);
        viewPager.setAdapter(myimgAdapter);
    }

    private void initimgData() {
        //创建集合 添加图片路径
        list = new ArrayList<>();
        list.add("http://www.5068.com/uploads/allimg/160318/1-16031Q42P9.jpg");
        list.add("http://i02.pic.sogou.com/c7e35f9ae6ce97c0");
        list.add("http://i03.pic.sogou.com/28e54d7d26656db8");
        list.add("http://i04.pic.sogou.com/ffc56cf9e2c6dbe4");
        list.add("http://img.jrjimg.cn/2014/07/20140709070037199.jpg");
    }
}

3.布局文件2

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    tools:context="com.example.dell.a1511q_luokaiqin.Main2Activity">

  <android.support.v4.widget.DrawerLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

      <RelativeLayout
          android:layout_width="match_parent"
          android:layout_height="match_parent">
          
    <FrameLayout
        android:id="@+id/my_fl"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@id/radio_group">
    </FrameLayout>

    <RadioGroup
        android:id="@+id/radio_group"
        android:layout_alignParentBottom="true"
        android:layout_width="match_parent"
        android:orientation="horizontal"
        android:layout_height="80dp">
        <RadioButton
            android:id="@+id/shouye"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:button="@null"
            android:layout_height="match_parent"
            android:gravity="center"
            android:drawableTop="@drawable/button_shouye1"
            android:checked="true"
            android:text="首页"/>
        <RadioButton
            android:id="@+id/shipin"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:button="@null"
            android:layout_height="match_parent"
            android:gravity="center"
            android:drawableTop="@drawable/button_shipin1"
            android:text="视频"/>
        <RadioButton
            android:id="@+id/fabu"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:button="@null"
            android:layout_height="match_parent"
            android:drawableTop="@drawable/button_fabu1"
            android:gravity="center"
            android:text="发布"/>
        <RadioButton
            android:id="@+id/weitoutiao"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:button="@null"
            android:layout_height="match_parent"
            android:gravity="center"
            android:drawableTop="@drawable/button_weitoutiao1"
            android:text="微头条"/>
        <RadioButton
            android:id="@+id/wode"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:button="@null"
            android:layout_height="match_parent"
            android:gravity="center"
            android:drawableTop="@drawable/button_wode1"
            android:text="我的"/>
    </RadioGroup>

      </RelativeLayout>

<RelativeLayout
        android:layout_width="200dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="#f89"
        android:padding="10dp">
        <ImageView
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:src="@mipmap/ic_launcher"/>
    </RelativeLayout>

    </android.support.v4.widget.DrawerLayout>
</RelativeLayout>

4.Main2Actvity

package com.example.dell.a1511q_luokaiqin;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.RadioGroup;
import com.example.dell.a1511q_luokaiqin.fragment.Fragment_01;
import com.example.dell.a1511q_luokaiqin.fragment.Fragment_02;
import com.example.dell.a1511q_luokaiqin.fragment.Fragment_03;
import com.example.dell.a1511q_luokaiqin.fragment.Fragment_04;
import com.example.dell.a1511q_luokaiqin.fragment.Fragment_05;

public class Main2Activity extends AppCompatActivity {

    private RadioGroup radioGroup;
    private FrameLayout frameLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        //找到资源控件的ID
        radioGroup = findViewById(R.id.radio_group);
        frameLayout = findViewById(R.id.my_fl);
        final Fragment_01 fragment_01 = new Fragment_01();
        final Fragment_02 fragment_02 = new Fragment_02();
        final Fragment_03 fragment_03 = new Fragment_03();
        final Fragment_04 fragment_04 = new Fragment_04();
        final Fragment_05 fragment_05 = new Fragment_05();

        getSupportFragmentManager().beginTransaction().replace(R.id.my_fl,fragment_01).commit();

        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int i) {
                switch (i){
               case R.id.shouye:
                   getSupportFragmentManager().beginTransaction().replace(R.id.my_fl,fragment_01).commit();
                    break;
               case R.id.shipin:
                   getSupportFragmentManager().beginTransaction().replace(R.id.my_fl,fragment_02).commit();
                    break;
               case R.id.fabu:
                   getSupportFragmentManager().beginTransaction().replace(R.id.my_fl,fragment_03).commit();
                    break;
               case R.id.weitoutiao:
                   getSupportFragmentManager().beginTransaction().replace(R.id.my_fl,fragment_04).commit();
                    break;
               default:
                     getSupportFragmentManager().beginTransaction().replace(R.id.my_fl,fragment_05).commit();
                     break;
                            }
            }
        });
    }
}

5.MyFragment

package com.example.dell.a1511q_luokaiqin.fragment;

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.ListView;
import android.widget.ScrollView;
import android.widget.Toast;
import com.example.dell.a1511q_luokaiqin.R;
import com.example.dell.a1511q_luokaiqin.adapter.MyAdapter;
import com.example.dell.a1511q_luokaiqin.data.RequestData;
import com.example.dell.a1511q_luokaiqin.util.MyTask;
import com.example.dell.a1511q_luokaiqin.util.NetStateUtil;
import com.google.gson.Gson;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshScrollView;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;

public class My_Fragment extends Fragment{

    private PullToRefreshScrollView scrollView;
    private String types="http://v.juhe.cn/toutiao/index?type=";
    private String key="&key=1976a2b0d51a2d4781f7ab531c1d13e0";
    String  url;
    private int type=1;//1.刷新。2.加载
    private List<RequestData.ResultBean.DataBean> list=new ArrayList<>();
    private ListView listView;
    private MyAdapter myAdapter;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.my_fragment,container,false);
        //找到
        scrollView = view.findViewById(R.id.my_psv);
        listView = view.findViewById(R.id.my_lv);

        Bundle arguments = getArguments();
        String name = arguments.getString("type");
        url = types + name +key;

        //初始化数据
        initpscData();

        //请求网络
        requestNetData();

        //关闭头尾布局
        scrollView.onRefreshComplete();

        return view;
    }

    private void requestNetData() {
        if(NetStateUtil.isConn(getActivity())){
            
            MyTask myTask = new MyTask(new MyTask.Icallbacks() {
                @Override
                public void updateUiByjson(String jsonstr) {
                    String reason=null;
                    try {
                        JSONObject jsonObject = new JSONObject(jsonstr);
                       reason = jsonObject.getString("reason");
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                  if(!reason.equals("超过每日可允许请求次数!")){
                    Gson gson = new Gson();
                    RequestData requestData = gson.fromJson(jsonstr, RequestData.class);

                       //将数据全部放入次集合中
                        list.addAll(requestData.getResult().getData());
                      //设置适配器
                      setAdapter();

                    }else{
                        Toast.makeText(getActivity(),"当前数据无法显示",Toast.LENGTH_SHORT).show();
                    }
                }
            });
            //myTask.execute(url);
        }
    }

    private void setAdapter() {
        if(myAdapter==null){
            myAdapter = new MyAdapter(getActivity(), list);
            listView.setAdapter(myAdapter);
        }else{
            myAdapter.notifyDataSetChanged();
        }
    }

    private void initpscData() {
        scrollView.setMode(PullToRefreshBase.Mode.BOTH);
        scrollView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ScrollView>() {
            @Override//下拉刷新
            public void onPullDownToRefresh(PullToRefreshBase<ScrollView> pullToRefreshBase) {
                type=1;
                requestNetData();
            }
            
            @Override//上拉加载
            public void onPullUpToRefresh(PullToRefreshBase<ScrollView> pullToRefreshBase) {
                type=2;
                requestNetData();
            }
        });
    }
}

6.my_Fragement的布局文件

<?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:background="#f81">

    <com.handmark.pulltorefresh.library.PullToRefreshScrollView
        android:id="@+id/my_psv"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <com.example.dell.a1511q_luokaiqin.zidingyi.MyListview
            android:id="@+id/my_lv"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
        </com.example.dell.a1511q_luokaiqin.zidingyi.MyListview>

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

</LinearLayout>

7.Fragment_01

package com.example.dell.a1511q_luokaiqin.fragment;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.dell.a1511q_luokaiqin.R;
import java.util.ArrayList;
import java.util.List;

public class Fragment_01 extends Fragment{

    private TabLayout my_tab;
    private ViewPager viewPager;
    private List<String> list;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment01,container,false);
        //找到资源控件的ID
        my_tab = view.findViewById(R.id.my_tab);
        viewPager = view.findViewById(R.id.view_pager);

        //初始化菜单布局数据
        inittabData();

        //设置适配器
        viewPager.setAdapter(new MyFragment(getActivity().getSupportFragmentManager()));

        //设置viewPager一次展示多页面数据
        viewPager.setOffscreenPageLimit(list.size());

        //将标题和viewPager关联
        my_tab.setupWithViewPager(viewPager);
        
        return view;
    }

    private void inittabData() {
        //创建集合 添加菜单数据
        list = new ArrayList<>();
        list.add("头条");
        list.add("社会");
        list.add("国内");
        list.add("国际");
        list.add("娱乐");
        list.add("体育");
        list.add("军事");
        list.add("科技");
        list.add("财经");
        list.add("时尚");
    }

    class MyFragment extends FragmentPagerAdapter{

        @Override//返回页面的标题
        public CharSequence getPageTitle(int position) {
            return list.get(position);
        }

        public MyFragment(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            My_Fragment my_fragment = new My_Fragment();
            Bundle bundle = new Bundle();
            //bundle.putString("name", lists.get(position));
           /* if(list.get(position).equals("头条")){
                bundle.putString("type","top");
            }else if(list.get(position).equals("社会")){
                bundle.putString("type","shehui");
            }else if(list.get(position).equals("国内")){
                bundle.putString("type","guonei");
            }else if(list.get(position).equals("国际")){
                bundle.putString("type","guoji");
            }else if(list.get(position).equals("娱乐")){
                bundle.putString("type","yule");
            }else if(list.get(position).equals("体育")){
                bundle.putString("type","tiyu");
            }else if(list.get(position).equals("军事")){
                bundle.putString("type","junshi");
            }else if(list.get(position).equals("科技")){
                bundle.putString("type","keji");
            }else if(list.get(position).equals("财经")){
                bundle.putString("type","caijing");
            }else if(list.get(position).equals("时尚")){
                bundle.putString("type","shishang");
            }*/
            my_fragment.setArguments(bundle);
            return my_fragment;
        }

        @Override
        public int getCount() {
            return list.size();
        }
    }

}

8.fragment_01布局文件

<?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"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:background="#f0f0f0">

    <LinearLayout
        android:id="@+id/lin_top"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:background="#f00"
        android:layout_height="60dp">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="24dp"
            android:textStyle="bold"
            android:layout_marginLeft="20dp"
            android:textColor="#fff"
            android:layout_gravity="center_vertical"
            android:text="今日头条"/>
        <EditText
            android:layout_width="250dp"
            android:layout_height="40dp"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="10dp"
            android:background="@drawable/uu"
            android:hint="请输入想搜索的内容"/>
    </LinearLayout>

    <android.support.design.widget.TabLayout
        android:id="@+id/my_tab"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        app:tabGravity="center"
        app:tabIndicatorColor="#fff"
        app:tabMode="scrollable"
        app:tabSelectedTextColor="#f89"
        app:tabTextColor="@color/colorPrimary">
    </android.support.design.widget.TabLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/view_pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </android.support.v4.view.ViewPager>

</LinearLayout>

9.Fragment_02:实现视频播放

package com.example.dell.a1511q_luokaiqin.fragment;

import android.os.Bundle;
import android.os.Environment;
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.Button;
import android.widget.MediaController;
import android.widget.VideoView;
import com.example.dell.a1511q_luokaiqin.R;

public class Fragment_02 extends Fragment{

    private String path = Environment.getExternalStorageDirectory()+"/Movies/minion_08.mp4";
    private VideoView videoView;
    private Button btn_bo;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment02,container,false);
        //找到资源控件的ID
        videoView = view.findViewById(R.id.my_video);
        btn_bo = view.findViewById(R.id.btn_bo);

        btn_bo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                //加载视频文件
                videoView.setVideoPath(path);

                //得到MediaController
                MediaController mediaController = new MediaController(getActivity());

                //将媒体控件器设置给videoView
                videoView.setMediaController(mediaController);

                //将videoView设置给媒体控件器
                mediaController.setAnchorView(videoView);

                //启动视频
                videoView.start();
            }
        });
        
        return view;
    }
}

10.fengament_02的布局文件

<?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"
    android:background="#FFFF80"
    android:padding="10dp">
    
    <VideoView
        android:id="@+id/my_video"
        android:layout_width="match_parent"
        android:layout_marginTop="50dp"
        android:layout_height="400dp" />

    <Button
        android:id="@+id/btn_bo"
        android:layout_marginTop="50dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="播放视频"/>

</LinearLayout>

11.MyimgAdpter:实现图片无限轮播的适配器

package com.example.dell.a1511q_luokaiqin.adapter;

import android.content.Context;
import android.graphics.Bitmap;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import com.example.dell.a1511q_luokaiqin.R;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;
import com.nostra13.universalimageloader.core.display.RoundedBitmapDisplayer;
import java.util.List;

public class MyimgAdapter extends PagerAdapter{
    private Context context;
    private List<String> list;
    private DisplayImageOptions options;
    public MyimgAdapter(Context context, List<String> list) {
        this.context=context;
        this.list=list;

        options = new DisplayImageOptions.Builder()
                .cacheInMemory(true)//使用内存缓存
                .cacheOnDisk(true)//使用磁盘缓存
                .showImageOnLoading(R.mipmap.ic_launcher)//设置正在下载的图片
                .showImageForEmptyUri(R.mipmap.ic_launcher)//url为空或请求的资源不存在时
                .showImageOnFail(R.mipmap.ic_launcher)//下载失败时显示的图片
                .bitmapConfig(Bitmap.Config.RGB_565)//设置图片色彩模式 1px=2字节
                .imageScaleType(ImageScaleType.EXACTLY)//设置图片的缩放模式
                .displayer(new RoundedBitmapDisplayer(100))//设置圆角 30代表半径 自定义
                .build();
    }

    @Override
    public int getCount() {
        return list.size();//图片数量设置为最大
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view==object;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        //创建显示图片的控件
        ImageView imageView = new ImageView(context);
        //网络异步获取图片
        ImageLoader.getInstance().displayImage(list.get(position),imageView,options);
        //将控件添加到容器
        container.addView(imageView);
        //返回控件
        return imageView;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((View) object);
    }
}

12.MyAdapter:实现数据的适配器

package com.example.dell.a1511q_luokaiqin.adapter;

import android.content.Context;
import android.graphics.Bitmap;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.example.dell.a1511q_luokaiqin.R;
import com.example.dell.a1511q_luokaiqin.data.RequestData;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;
import java.util.List;

public class MyAdapter extends BaseAdapter{
    private Context context;
    private List<RequestData.ResultBean.DataBean> list;
    private int YI_IMAGE=0;
    private int ER_IMAGE=1;
    private int SAN_IMAGE=2;
    private DisplayImageOptions options;

    public MyAdapter(Context context, List<RequestData.ResultBean.DataBean> list) {
        this.context=context;
        this.list=list;
        options=new DisplayImageOptions.Builder()
                .cacheInMemory(true)//使用内存缓存
                .cacheOnDisk(true)//使用磁盘缓存
                .showImageOnLoading(R.mipmap.ic_launcher)//设置正在下载的图片
                .showImageForEmptyUri(R.mipmap.ic_launcher)//url为空或请求的资源不存在时
                .showImageOnFail(R.mipmap.ic_launcher)//下载失败时显示的图片
                .bitmapConfig(Bitmap.Config.RGB_565)//设置图片色彩模式
                .imageScaleType(ImageScaleType.EXACTLY)//设置图片的缩放模式===imageView,,ScaleType
                //.displayer(new RoundedBitmapDisplayer(50))//设置图片圆角显示  弧度
                .build();
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int i) {
        return list.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @Override
    public int getViewTypeCount() {
        return 3;
    }

    @Override
    public int getItemViewType(int position) {
        String pic_s = list.get(position).getThumbnail_pic_s();
        String pic_s02 = list.get(position).getThumbnail_pic_s02();
        String pic_s03 = list.get(position).getThumbnail_pic_s03();
        if(pic_s!=null && pic_s02==null && pic_s03==null){
            return YI_IMAGE;
        }else if(pic_s!=null && pic_s02!=null && pic_s03==null){
            return ER_IMAGE;
        }else{
            return SAN_IMAGE;
        }
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        int type = getItemViewType(i);
        if(type==YI_IMAGE){
            ViewHolder1 holder1;
            if(view==null){
                view = View.inflate(context, R.layout.tiem1, null);
                holder1 = new ViewHolder1();
                holder1.title = view.findViewById(R.id.text_title);
                holder1.pic_s = view.findViewById(R.id.image_pic_s);
                view.setTag(holder1);
            }else{
                holder1 = (ViewHolder1) view.getTag();
            }
                holder1.title.setText(list.get(i).getTitle());
            ImageLoader.getInstance().displayImage(list.get(i).getThumbnail_pic_s(),holder1.pic_s,options);
            return view;
        }else if(type==ER_IMAGE){
            ViewHolder2 holder2;
            if(view==null){
                view = View.inflate(context, R.layout.tiem2, null);
                holder2 = new ViewHolder2();
                holder2.title2 = view.findViewById(R.id.text_title2);
                holder2.pic2_s = view.findViewById(R.id.image2_pic_s);
                holder2.pic2_s02 = view.findViewById(R.id.image2_pic_s02);
                view.setTag(holder2);
            }else{
                holder2 = (ViewHolder2) view.getTag();
            }
            holder2.title2.setText(list.get(i).getTitle());
            ImageLoader.getInstance().displayImage(list.get(i).getThumbnail_pic_s(),holder2.pic2_s,options);
            ImageLoader.getInstance().displayImage(list.get(i).getThumbnail_pic_s02(),holder2.pic2_s02,options);
            return view;
        }else{
            ViewHolder3 holder3;
            if(view==null){
                view = View.inflate(context, R.layout.tiem3, null);
                holder3 = new ViewHolder3();
                holder3.title3 = view.findViewById(R.id.text_title3);
                holder3.pic3_s = view.findViewById(R.id.image3_pic_s);
                holder3.pic3_s02 = view.findViewById(R.id.image3_pic_s02);
                holder3.pic3_s03 = view.findViewById(R.id.image3_pic_s03);
                view.setTag(holder3);
            }else{
                holder3 = (ViewHolder3) view.getTag();
            }
            holder3.title3.setText(list.get(i).getTitle());
            ImageLoader.getInstance().displayImage(list.get(i).getThumbnail_pic_s(),holder3.pic3_s,options);
            ImageLoader.getInstance().displayImage(list.get(i).getThumbnail_pic_s02(),holder3.pic3_s02,options);
            ImageLoader.getInstance().displayImage(list.get(i).getThumbnail_pic_s03(),holder3.pic3_s03,options);
            return view;
        }
    }

    class ViewHolder1{
        TextView title;
        ImageView pic_s;
    }
    class ViewHolder2{
        TextView title2;
        ImageView pic2_s;
        ImageView pic2_s02;
    }
    class ViewHolder3{
        TextView title3;
        ImageView pic3_s;
        ImageView pic3_s02;
        ImageView pic3_s03;
    }
}

13.MyApplication:异步获取图片的框架

package com.example.dell.a1511q_luokaiqin.util;

import android.app.Application;
import com.nostra13.universalimageloader.cache.disc.impl.UnlimitedDiscCache;
import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import java.io.File;

public class MyApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        
        //需要识记的是以下几个参数：
        File cacheFile=getExternalCacheDir();
        ImageLoaderConfiguration config=new ImageLoaderConfiguration.Builder(this)
                .memoryCacheExtraOptions(480, 800)//缓存图片最大的长和宽
                .threadPoolSize(2)//线程池的数量
                .threadPriority(4)
                .memoryCacheSize(2*1024*1024)//设置内存缓存区大小
                .diskCacheSize(20*1024*1024)//设置sd卡缓存区大小
                .diskCache(new UnlimitedDiscCache(cacheFile))//自定义缓存目录
                .writeDebugLogs()//打印日志内容
                .diskCacheFileNameGenerator(new Md5FileNameGenerator())//给缓存的文件名进行md5加密处理
              .build();
        ImageLoader.getInstance().init(config);
    }
}

14.MyTask：网络获取图片的方法

package com.example.dell.a1511q_luokaiqin.util;

import android.os.AsyncTask;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class MyTask extends AsyncTask<String,Void,String> {

    //申请一个接口类对象
    private  Icallbacks icallbacks;

    //将无参构造设置成私有的，使之在外部不能够调用
    private MyTask(){}

    //定义有参构造方法
    public MyTask(Icallbacks icallbacks) {
        this.icallbacks = icallbacks;
    }

    @Override
    protected String doInBackground(String... params) {
        String str="";

        try {
             //使用HttpUrlConnection
            URL url=new URL(params[0]);
            HttpURLConnection connection=(HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.setReadTimeout(5000);
            connection.setConnectTimeout(5000);

            if(connection.getResponseCode()==200){
                InputStream inputStream=connection.getInputStream();
                //调用工具类中的静态方法
                str=StreamToString.streamToStr(inputStream,"utf-8");
            }

        } catch (MalformedURLException e) {
            e.printStackTrace();
        }catch (IOException e){
            e.printStackTrace();
        }

        return str;
    }

    @Override
    protected void onPostExecute(String s) {
        super.onPostExecute(s);
        //解析，封装到bean,更新ui组件
        icallbacks.updateUiByjson(s);
        
    }
    //定义一个接口
    public interface Icallbacks{
        /**
         * 根据回传的json字符串，解析并更新页面组件
         * @param jsonstr
         */
        void updateUiByjson(String jsonstr);
    }
}

15.NetStateUtil:判断网络是否连接

package com.example.dell.a1511q_luokaiqin.util;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import com.example.dell.a1511q_luokaiqin.R;

public class NetStateUtil {

    /*
 * 判断网络连接是否已开
 * true 已打开  false 未打开
 * */
    public static boolean isConn(Context context){
        boolean bisConnFlag=false;
        ConnectivityManager conManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo network = conManager.getActiveNetworkInfo();
        if(network!=null){
            bisConnFlag=conManager.getActiveNetworkInfo().isAvailable();
        }
        return bisConnFlag;
    }

    /**
     * 当判断当前手机没有网络时选择是否打开网络设置
     * @param context
     */
    public static void showNoNetWorkDlg(final Context context) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setIcon(R.mipmap.ic_launcher)         //
                .setTitle(R.string.app_name)            //
                .setMessage("当前无网络").setPositiveButton("设置", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // 跳转到系统的网络设置界面
                Intent intent = null;
                // 先判断当前系统版本
                if(android.os.Build.VERSION.SDK_INT > 10){  // 3.0以上
                    intent = new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS);
                }else{
                    intent = new Intent();
                    intent.setClassName("com.android.settings", "com.android.settings.WirelessSettings");
                }
                context.startActivity(intent);

            }
        }).setNegativeButton("知道了", null).show();
    }
}

16.StreamToString:流转为字符串的方法

package com.example.dell.a1511q_luokaiqin.util;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

public class StreamToString {

    public static String streamToStr(InputStream inputStream,String chartSet){

        StringBuilder builder=new StringBuilder();
        try {
            BufferedReader br=new BufferedReader(new InputStreamReader(inputStream,chartSet));
            String con;
            while ((con=br.readLine())!=null){
                builder.append(con);
            }
            
            br.close();
            return builder.toString();
            
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        return "";
    }
}

17.多条目布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent"
    android:padding="15dp">

    <TextView
        android:id="@+id/text_title"
        android:layout_width="280dp"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:padding="10dp"/>
    <ImageView
        android:id="@+id/image_pic_s"
        android:layout_toRightOf="@id/text_title"
        android:layout_width="120dp"
        android:layout_height="88dp" />

</RelativeLayout>

<?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"
    android:padding="15dp">

    <TextView
        android:id="@+id/text_title2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    
    <LinearLayout
        android:layout_width="match_parent"
        android:orientation="horizontal"
        android:layout_height="wrap_content">
        <ImageView
            android:id="@+id/image2_pic_s"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="88dp" />
        <ImageView
            android:id="@+id/image2_pic_s02"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="88dp" />

    </LinearLayout>


</LinearLayout>

<?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"
    android:padding="15dp">

    <TextView
        android:id="@+id/text_title3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <LinearLayout
        android:layout_width="match_parent"
        android:orientation="horizontal"
        android:layout_height="wrap_content">
        <ImageView
            android:id="@+id/image3_pic_s"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="88dp" />
        <ImageView
            android:id="@+id/image3_pic_s02"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="88dp" />
        <ImageView
            android:id="@+id/image3_pic_s03"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="88dp" />

    </LinearLayout>
    
</LinearLayout>

18.实现圆角边框布局

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <solid android:color="#fff"></solid>
    <stroke android:width="1dp" android:color="#f89"></stroke>
    <corners android:radius="5sp"></corners>

</shape>

19.Button按钮点击切换布局

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    
    <item android:state_checked="true" android:drawable="@drawable/shouye_yes"></item>
    <item android:state_checked="false" android:drawable="@drawable/shouye_no"></item>

</selector>

20.清单文件的权限

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

android:name=".application.MyApplication"