第一套第二题

1、网络权限

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

2、动画

Main XML

<LinearLayout
    android:orientation="vertical" 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=".MainActivity">



    <!--FrameLayout包裹按钮-->
    <FrameLayout
        android:id="@+id/frament"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">
    </FrameLayout><!--FrameLayout包裹按钮-->

    <RadioGroup
        android:id="@+id/redo"
        android:layout_width="match_parent"
        android:layout_height="54dp"
        android:layout_gravity="bottom"
        android:orientation="horizontal">

        <RadioButton
            android:id="@+id/lie_biao"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:button="@null"
            android:gravity="center"
            android:text="列表" />

        <RadioButton
            android:id="@+id/xiang_qing"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:button="@null"
            android:gravity="center"
            android:text="详情" />
    </RadioGroup>

</LinearLayout>

3、Main点击切换页面

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

    private FragmentManager supportFragmentManager;
    //执行者调全局
    private FragmentTransaction fragmentTransaction;
    //调全局FrameLayout控件
    public FrameLayout frament;
    private AFragment aFragment;
    private BFragment bFragment;
    private RadioButton lie_biao;
    private RadioButton xiang_qing;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);//注意改变Main入口
        initView();
        initData();
    }

    private void initData() {
        aFragment = new AFragment();
        bFragment = new BFragment();
        supportFragmentManager = getSupportFragmentManager();
        fragmentTransaction = supportFragmentManager.beginTransaction();
        fragmentTransaction.add(R.id.frament,aFragment);

        fragmentTransaction.commit();
    }

    private void initView() {
        lie_biao = (RadioButton) findViewById(R.id.lie_biao);
        xiang_qing = (RadioButton) findViewById(R.id.xiang_qing);
        lie_biao.setOnClickListener(this);
        xiang_qing.setOnClickListener(this);
        frament = (FrameLayout) findViewById(R.id.frament);
        frament.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.lie_biao:
                //管理者         执行者          //替换                                   //提交
                getSupportFragmentManager().beginTransaction().replace(R.id.frament,aFragment).commit();
                break;
            case R.id.xiang_qing:
                //管理者         执行者             //替换                                   //提交
                getSupportFragmentManager().beginTransaction().replace(R.id.frament,bFragment).commit();

                break;

        }
    }

}

4、AFragment页面

public class AFragment extends Fragment {

    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            String json = (String) msg.obj;
            MyBean myBean = new Gson().fromJson(json, MyBean.class);
            student = myBean.getStudents().getStudent();
            recy.setLayoutManager(new LinearLayoutManager(getContext()));
            myAdapter = new MyAdapter(AFragment.this.student, getContext());
            recy.setAdapter(myAdapter);
            myAdapter.setOnCliK(new MyAdapter.OnClik() {
                @Override
                public void OnCliklistener(int position) {
                    //在AFragment中适配器点击事件中，调用BFragment的集合进行添加我们电机的图片的url地址
                    BFragment.list.add(student.get(position).getImg());

                }
            });
        }
    };
    private RecyclerView recy;
    public static MyAdapter myAdapter;
    public static List<MyBean.StudentsBean.StudentBean> student;

    public AFragment() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View inflate = inflater.inflate(R.layout.fragment_a, container, false);

        initView(inflate);
        initData();
        return inflate;
    }


    private void initData() {
        OkHttpClient build = new OkHttpClient.Builder().build();
        Request request = new Request.Builder().url("http://192.168.43.191:8080/data.json").build();
        build.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String string = response.body().string();
                handler.obtainMessage(1, string).sendToTarget();
            }
        });


    }

    private void initView(View inflate) {
        recy = (RecyclerView) inflate.findViewById(R.id.recy);
    }


}

5、Bfragment页面

public class BFragment extends Fragment {
    private MyBean.StudentsBean.StudentBean bean;
    private ImageView img;
    private String imgV;
    public static ArrayList<String> list = new ArrayList<>();
    private RecyclerView recy;
    private MyBAdapter myBAdapter;
    //    private
//    private ImageView img;

    public BFragment() {
        // Required empty public constructor
    }

    //在我们的Activity获取到焦点的时候我们进行适配器刷新
    @Override
    public void onResume() {
        super.onResume();
        myBAdapter.notifyDataSetChanged();
    }

    public static int tag;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_b, container, false);
        initView(view);
        myBAdapter = new MyBAdapter(list, getActivity());
        recy.setLayoutManager(new GridLayoutManager(getContext(),2));
        recy.setAdapter(myBAdapter);
        myBAdapter.setOnCilckListener(new MyBAdapter.onCilckListener() {
            @Override
            public void onClick(int position) {
                Intent intent = new Intent(getContext(), Main2Activity.class);
                tag = position;
                startActivity(intent);
            }
        });

        return view;
    }

    private void initView(View view) {
        img = (ImageView) view.findViewById(R.id.img);
        recy = (RecyclerView) view.findViewById(R.id.recy);
    }
}

6、A适配器

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.Holder> {

    private List<MyBean.StudentsBean.StudentBean> student;
    private Context mc;
    private OnClik onClik;

    public MyAdapter(List<MyBean.StudentsBean.StudentBean> student, Context mc) {
        this.student = student;
        this.mc = mc;
    }

    @NonNull
    @Override
    public MyAdapter.Holder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View inflate = LayoutInflater.from(mc).inflate(R.layout.itema, parent, false);

        return new Holder(inflate);
    }

    @Override
    public void onBindViewHolder(@NonNull MyAdapter.Holder holder, final int position) {
        holder.name.setText(student.get(position).getName());
        holder.conten.setText(student.get(position).getContent());
        Picasso.with(mc).load(student.get(position).getImg()).into(holder.img);
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onClik.OnCliklistener(position);
            }
        });

    }

    @Override
    public int getItemCount() {
        return student.size();
    }

    public class Holder extends RecyclerView.ViewHolder {

        private final ImageView img;
        private final TextView name;
        private final TextView conten;

        public Holder(View itemView) {
            super(itemView);
            img = itemView.findViewById(R.id.img);
            name = itemView.findViewById(R.id.name);
            conten = itemView.findViewById(R.id.conten);
        }
    }
    public interface OnClik{
        void OnCliklistener (int position);
    }
    public void setOnCliK(OnClik onClik){
        this.onClik=onClik;
    }
}

7、B适配器

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public class MyBAdapter extends RecyclerView.Adapter<MyBAdapter.Holder> {

    private ArrayList<String> list;
    private Context mc;
    onCilckListener onCilckListener;

    public void setOnCilckListener(MyBAdapter.onCilckListener onCilckListener) {
        this.onCilckListener = onCilckListener;
    }

    public interface onCilckListener{
        void onClick(int position);
    }
    public MyBAdapter(ArrayList<String> list, Context mc) {
        this.list = list;
        this.mc = mc;
    }

    @NonNull
    @Override
    public MyBAdapter.Holder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View inflate = LayoutInflater.from(mc).inflate(R.layout.itemb, parent, false);

        return new Holder(inflate);
    }

    @Override
    public void onBindViewHolder(@NonNull MyBAdapter.Holder holder, final int position) {

        Picasso.with(mc).load(list.get(position)).into(holder.img);
            holder.img.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    onCilckListener.onClick(position);
                }
            });
    }

    @Override
    public int getItemCount() {
        return list==null?0:list.size();
    }

    public class Holder extends RecyclerView.ViewHolder {

        private final ImageView img;


        public Holder(View itemView) {
            super(itemView);
            img = itemView.findViewById(R.id.img);

        }
    }
}

8、b——item XML

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <ImageView
        android:id="@+id/img"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:src="@mipmap/ic_launcher" />


</LinearLayout>

9、a_item XML；

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <ImageView
        android:id="@+id/img"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@mipmap/ic_launcher" />

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="100dp">

        <TextView
            android:id="@+id/name"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hhh" />

        <TextView
            android:layout_marginTop="20dp"
            android:id="@+id/conten"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="hhh" />
    </LinearLayout>
</LinearLayout>

A Fragment XML

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".AFragment">

   <TextView
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:text="首页"
       android:gravity="center"
       android:textSize="25sp"/>
    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/recy"/>
</LinearLayout>

BFragment XML

<LinearLayout
    android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".BFragment">

   
   <android.support.v7.widget.RecyclerView
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:id="@+id/recy"
       ></android.support.v7.widget.RecyclerView>

</LinearLayout>

轮播图XML

<android.support.constraint.ConstraintLayout 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=".Main2Activity">
<android.support.v4.view.ViewPager
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/vp"
    ></android.support.v4.view.ViewPager>
</android.support.constraint.ConstraintLayout>

轮播图Java代码

public class Main2Activity extends AppCompatActivity {

    public static ViewPager vp;
    private ArrayList<ImageView> imageViews;
    private PagerAdapter pagerAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        initView();

        ArrayList<String> list = BFragment.list;
        imageViews = new ArrayList<>();

        for (int i = 0; i < list.size(); i++) {
            ImageView imageView = new ImageView(this);
            Picasso.with(this).load(list.get(i)).into(imageView);
            imageViews.add(imageView);
        }
        pagerAdapter = new PagerAdapter() {
            @Override
            public int getCount() {
                return imageViews.size();
            }

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

            @NonNull
            @Override
            public Object instantiateItem(@NonNull ViewGroup container, int position) {
                container.addView(imageViews.get(position));

                return imageViews.get(position);
            }

            @Override
            public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {

                container.removeView(imageViews.get(position));
            }
        };
        vp.setAdapter(pagerAdapter);
    }

    @Override
    protected void onResume() {
        super.onResume();

        vp.setCurrentItem(BFragment.tag);
        pagerAdapter.notifyDataSetChanged();
    }

    private void initView() {
        vp = (ViewPager) findViewById(R.id.vp);
    }
}