Fragment、点击、隐藏、显示Fragemt、插入数据库、数据库查看详情

xml:

xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context="com.example.mmaster.m_1_myapplication.Main2Activity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="54dp"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:text="首页"
            android:textSize="30sp" />


    RelativeLayout>

    
    <FrameLayout
        android:id="@+id/frament"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">
    FrameLayout>

        <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>

java代码：俩页面切换不用适配器嘀嘀嘀嘀嘀

package com.example.mmaster.m_1_myapplication;

import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;

import com.example.mmaster.m_1_myapplication.fragment.AFragment;
import com.example.mmaster.m_1_myapplication.fragment.BFragment;

public class Main2Activity 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_main2);//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;

        }
    }
}

AFregment java代码：实体Bean联系到数据库

package com.example.mmaster.m_1_myapplication.fragment;


import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;

import com.example.mmaster.m_1_myapplication.App;
import com.example.mmaster.m_1_myapplication.R;
import com.example.mmaster.m_1_myapplication.StudentBean;
import com.example.mmaster.m_1_myapplication.adapter.MyAdapter;
import com.example.mmaster.m_1_myapplication.bean.Bean;
import com.google.gson.Gson;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import app.jiyun.com.testsqlitegd.greendao.StudentBeanDao;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

/**
 * A simple {@link Fragment} subclass.
 */
public class AFragment extends Fragment {

    private String url = "http://192.168.43.191:8080/data.json";
    private RecyclerView recy;
    private List student;
    private Handler handler = new Handler() {

        private MyAdapter myAdapter;

        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            String json = (String) msg.obj;
            Bean bean = new Gson().fromJson(json, Bean.class);
            student = bean.getStudents().getStudent();

            LinearLayoutManager manager = new LinearLayoutManager(getContext());
            recy.setLayoutManager(manager);
            myAdapter = new MyAdapter(student, getContext());
            recy.setAdapter(myAdapter);

            myAdapter.setOnCliK(new MyAdapter.OnClik() {
                @Override
                public void OnCliklistener(int position) {
                    String image = student.get(position).getImg();
                    String content = student.get(position).getContent();
                    String name = student.get(position).getName();
                    StudentBean studentBean = new StudentBean(null, name, content, image);
                    dao.insert(studentBean);
                    //加入到数据库
                }
            });
        }
    };
    private StudentBeanDao dao;


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


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View inflate = inflater.inflate(R.layout.fragment_a, container, false);
        //数据库
        dao = App.getMyApp().getDaoSession().getStudentBeanDao();
        initView(inflate);
        initData();
        return inflate;
    }

    private void initData() {
        OkHttpClient build = new OkHttpClient.Builder().build();
        Request request = new Request.Builder().url(url).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);
    }
}

BFragment java代码：

package com.example.mmaster.m_1_myapplication.fragment;


import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.example.mmaster.m_1_myapplication.App;
import com.example.mmaster.m_1_myapplication.MainXiang_Activity;
import com.example.mmaster.m_1_myapplication.R;
import com.example.mmaster.m_1_myapplication.StudentBean;
import com.example.mmaster.m_1_myapplication.adapter.MyAdapter;
import com.squareup.picasso.Picasso;

import java.util.List;

import app.jiyun.com.testsqlitegd.greendao.StudentBeanDao;

/**
 * A simple {@link Fragment} subclass.
 */
public class BFragment extends Fragment {

    public static String string1;
    public static String string;
    public static  String string2;
    private RecyclerView recy;
    private StudentBeanDao dao1;
    private MyAdapter myAdapter;
    private List studentBeans;

    public BFragment() {
        // 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_b, container, false);
        initView(inflate);

        dao1 = App.getMyApp().getDaoSession().getStudentBeanDao();
        studentBeans = dao1.loadAll();
        myAdapter = new MyAdapter(studentBeans, getContext());
        recy.setAdapter(myAdapter);
        initData();
        return inflate;
    }

    private void initData() {
        myAdapter.setOnCliK(new MyAdapter.OnClik() {

            @Override
            public void OnCliklistener(int position) {
                string = studentBeans.get(position).getContent().toString();
                string1 = studentBeans.get(position).getName().toString();
                string2 = studentBeans.get(position).getImg().toString();

                Intent intent = new Intent(getContext(), MainXiang_Activity.class);
                startActivity(intent);
            }
        });
    }

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

详情页面 java代码：

package com.example.mmaster.m_1_myapplication;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.mmaster.m_1_myapplication.fragment.BFragment;
import com.squareup.picasso.Picasso;

public class MainXiang_Activity extends AppCompatActivity {
    private TextView content;
    private TextView name;
    private ImageView img;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_xiang_);
        initView();
        Intent intent = getIntent();//用不到不用写
        

content.setText(BFragment.string);
name.setText(BFragment.string1);
Picasso.with(this).load(BFragment.string2).into(img);

} private void initView() { content = (TextView) findViewById(R.id. content); name = (TextView) findViewById(R.id. name); img = (ImageView) findViewById(R.id. img); }}