第二阶段冲刺-2

一、说在前面

1、今天任务：整改新闻首页，用viewpage来区别不同类别的新闻（5h）

2、明天任务：完善个人信息界面（预计2h）

3、遇到问题：如果轮播图被向上滑动一点时就失去了轮播功能（所以没改还是固定）

二、效果

 

 三、代码

1、ListFragment.java

package com.me.fragment;


import android.content.Intent;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.ImageView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.widget.ListPopupWindow;
import androidx.fragment.app.Fragment;
import androidx.viewpager2.widget.ViewPager2;

import com.google.android.material.tabs.TabLayout;
import com.google.android.material.tabs.TabLayoutMediator;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.me.ViewModel.NewsViewModel;
import com.me.adapter.ListPopupWindowAdapter;
import com.me.adapter.TabAdapter;
import com.me.domain.New_;
import com.me.domain.News;
import com.me.jk.ImgViewGroupLister;
import com.me.news_2.NewsActivity;
import com.me.news_2.R;
import com.me.util.HttpUtil;

import java.util.ArrayList;
import java.util.List;

public class ListFragment extends Fragment implements ImgViewGroupLister {
    private ViewPager2 viewPager2;
    private TabLayout tabLayout;
    private List<Fragment> data = new ArrayList<>();
    private EditText mEditText;
    private ImageView imageView;
    private SentUrlTask sentUrlTask;
    private SearchTask searchTask;
    private ListPopupWindow mListPop  ;
    private List<News> lists = new ArrayList<News>();
    private List<News> list = new ArrayList<News>();
    private ListPopupWindowAdapter adapter_ = new ListPopupWindowAdapter();
    private NewsViewModel newsViewModel;

    public ListFragment() {
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View inflate = inflater.inflate(R.layout.fragment_list, container, false);
        viewPager2 = inflate.findViewById(R.id.vp_news);
        tabLayout = inflate.findViewById(R.id.tab);

        mEditText = inflate.findViewById(R.id.word);
        adapter_.setEditText(mEditText);
        imageView = inflate.findViewById(R.id.iv_search);
        adapter_.setImageView(imageView);
        return inflate;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        sentUrlTask = new ListFragment.SentUrlTask("http://192.168.1.17:8080/NewsApi/news?method=allnews");
//        sentUrlTask = new ListFragment.SentUrlTask("http://192.168.43.243:8080/NewsApi/news?method=allnews");
        sentUrlTask.execute();
        searchTask = new SearchTask();

        mListPop = new ListPopupWindow(requireContext());
        adapter_.setmListPop(mListPop);
        mListPop.setAdapter(adapter_);

        mListPop.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
        mListPop.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
        mListPop.setAnchorView(mEditText);//设置ListPopupWindow的锚点，即关联PopupWindow的显示位置和这个锚点

        mEditText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                String url = "http://192.168.1.17:8080/NewsApi/news?method=search&word=重";
                url += s.toString();
                searchTask.setUrl(url);
            }

            @Override
            public void afterTextChanged(Editable s) {
                mListPop.show();

            }
        });

        mEditText.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
//                mListPop.show();
            }
        });

        TabAdapter tabAdapter = new TabAdapter(requireActivity());

        data.add(new tuijianFragment());
        data.add(new yvreFragment());
        data.add(new caijingFragment());
        data.add(new tiyvFragment());

        data.add(new junshiFragment());
        data.add(new kejiFragment());
        data.add(new shoujiFragment());
        data.add(new shumaFragment());

        data.add(new shishangFragment());
        data.add(new youxiFragment());
        data.add(new jiaoyvFragment());
        data.add(new jiankangFragment());
        data.add(new lvyouFragment());

        tabAdapter.setData(data);

        viewPager2.setAdapter(tabAdapter);
        tabLayout.setTabTextColors(Color.parseColor("#111111"),Color.parseColor("#0371DD"));
        new TabLayoutMediator(tabLayout, viewPager2, new TabLayoutMediator.TabConfigurationStrategy() {
            @Override
            public void onConfigureTab(@NonNull TabLayout.Tab tab, int position) {
                switch (position){
                    case 0:
                        tab.setText("推荐");
                        break;
                    case 1:
                        tab.setText("娱乐");
                        break;
                    case 2:
                        tab.setText("财经");
                        break;
                    case 3:
                        tab.setText("体育");
                        break;
                    case 4:
                        tab.setText("军事");
                        break;
                    case 5:
                        tab.setText("科技");
                        break;
                    case 6:
                        tab.setText("手机");
                        break;
                    case 7:
                        tab.setText("数码");
                        break;
                    case 8:
                        tab.setText("时尚");
                        break;
                    case 9:
                        tab.setText("游戏");
                        break;
                    case 10:
                        tab.setText("教育");
                        break;
                    case 11:
                        tab.setText("健康");
                        break;
                    case 12:
                        tab.setText("旅游");
                        break;
                    default:
                        tab.setText("null"+position);
                }
            }
        }).attach();

    }


    @Override
    public void clickImg(int index) {
        Gson gson = new Gson();
        String s = "";
        if (list.get(index).getHistory()!=true){
            list.get(index).setHistory(true);
            s = gson.toJson(list.get(index));
            newsViewModel.insertNews(gson.fromJson(s, New_.class));
        }
        s = gson.toJson(list.get(index));
        Intent intent = new Intent(requireContext(), NewsActivity.class);
        intent.putExtra("news",s);
        startActivity(intent);
    }

    private class SearchTask extends AsyncTask<Void,Void,String> {

        private  String url;

        public void setUrl(String url) {
            this.url = url;
        }

        @Override
        protected String doInBackground(Void... voids) {
            return HttpUtil.setUrl(url);
        }

        @Override
        protected void onPostExecute(@NonNull String s) {
            super.onPostExecute(s);
            Gson gson = new Gson();
            lists = gson.fromJson(s,new TypeToken<List<News>>(){}.getType());
            adapter_.setList(lists);
        }
    }

    private class SentUrlTask extends AsyncTask<Void,Void,String> {

        private  String url;

        public SentUrlTask(String url) {
            this.url = url;
        }

        @Override
        protected String doInBackground(Void... voids) {
            return HttpUtil.setUrl(url);
        }

        @Override
        protected void onPostExecute(@NonNull String s) {
            super.onPostExecute(s);
            Gson gson = new Gson();
            System.out.println(s);
            list = gson.fromJson(s, new TypeToken<List<News>>(){}.getType());


            for (int i = 0; i < 5; i++) {
                lists.add(list.get(i));
                adapter_.setList(lists);
            }
        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (sentUrlTask != null) {
            sentUrlTask.cancel(true);
        }

    }
}

 2、list_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"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    tools:context="com.me.fragment.ListFragment">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:background="#F00808"
        android:orientation="horizontal">

        <EditText
            android:id="@+id/word"
            android:layout_width="340dp"
            android:layout_height="40dp"
            android:layout_marginStart="20dp"
            android:layout_marginTop="10dp"
            android:layout_marginEnd="5dp"
            android:layout_marginBottom="10dp"
            android:background="@drawable/ev"
            android:ems="18"
            android:hint="新闻关键字"
            android:inputType="textPersonName"
            android:textColorHint="#C0C0C0"
            android:textSize="18dp" />

        <ImageView
            android:id="@+id/iv_search"
            android:layout_width="30dp"
            android:layout_height="20dp"
            android:layout_marginTop="20dp"
            android:src="@mipmap/search" />

    </LinearLayout>

    <com.google.android.material.tabs.TabLayout
        android:id="@+id/tab"
        android:layout_width="match_parent"
        app:tabTextAppearance="@style/TabLayoutTextStyle"
        app:tabMode="scrollable"
        android:layout_height="60dp">

        <com.google.android.material.tabs.TabItem
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            style="@style/TabLayoutTextStyle"
            android:text="Monday" />

        <com.google.android.material.tabs.TabItem
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Tuesday" />

        <com.google.android.material.tabs.TabItem
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Wednesday" />
    </com.google.android.material.tabs.TabLayout>

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/vp_news"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>