移动开发作业一：仿微信UI

功能要求

1、请根据课程内容设计一个app的门户框架，需要实现3-4个tab切换效果；本功能要求需要的技术为：activity、xml、fragment
2、在任一tab页中实现列表效果；本功能的实现需要使用recycleview；

开发技术

开发工具：Android Studio

版本：API24 Android 7.0

设计流程

总览：文件目录结构

结构目录

布局代码：

标题栏 top.xml

标题栏 top.xml

<?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">

    <TextView
        android:id="@+id/content"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:background="@color/black"
        android:gravity="center"
        android:text="@string/myApp"
        android:textColor="@color/white"
        android:textSize="35sp" />
</LinearLayout>

底部导航 button.xml

底部导航 button.xml 

<?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="wrap_content"
    android:background="@color/black"
    android:orientation="horizontal">

    <LinearLayout
        android:id="@+id/LinearLayout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"

        android:orientation="vertical">

        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="8dp"
            android:src="@drawable/message_1_24dp" />

        <TextView
            android:id="@+id/textView1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textColor="@color/white"
            android:gravity="center"
            android:textStyle="bold"
            android:layout_margin="3dp"
            android:text="消息" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/LinearLayout2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"

        android:orientation="vertical">

        <ImageView
            android:id="@+id/imageView2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="8dp"
            android:src="@drawable/addrbook_2_24dp" />

        <TextView
            android:id="@+id/textView2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textColor="@color/white"
            android:gravity="center"
            android:layout_margin="3dp"
            android:text="联系人" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/LinearLayout3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"

        android:orientation="vertical">

        <ImageView
            android:id="@+id/imageView3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="8dp"
            android:src="@drawable/discover_3_24dp" />

        <TextView
            android:id="@+id/textView3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:textColor="@color/white"
            android:layout_margin="3dp"
            android:text="发现" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/LinearLayout4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"

        android:orientation="vertical">

        <ImageView
            android:id="@+id/imageView4"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="8dp"
            android:src="@drawable/myself_4_24dp" />

        <TextView
            android:id="@+id/textView4"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:textColor="@color/white"
            android:layout_margin="3dp"
            android:text="我" />
    </LinearLayout>
</LinearLayout>

中间部分 main.xml、item.xml 以及4个切换的界面（tab1.xml、tab2.xml、tab3.xml、tab4.xml）

中间部分 main.xml、item.xml 以及4个切换的界面（tab1.xml、tab2.xml、tab3.xml、tab4.xml）

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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <include
        layout="@layout/top"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_gravity="center"
        android:layout_weight="1">

    </FrameLayout>

    <include
        layout="@layout/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom" />

</LinearLayout>

item.xml

<?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="wrap_content">

    <TextView
        android:id="@+id/item"
        android:layout_width="0dp"
        android:layout_height="100dp"
        android:layout_weight="1"
        android:gravity="center"
        android:text="TextView"
        android:textColor="@android:color/black"
        android:textSize="40sp" />
</LinearLayout>

tab1.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".recycleActivity">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/tab1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

tab2-4.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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">

    <TextView
        android:id="@+id/tab2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:gravity="center"
        android:text="@string/addrbook2"
        android:textSize="40sp" />

</FrameLayout>

Java 代码：

MainActivity.java代码主要包含四个部分：

  1. 初始化：将所有的 fragment 加入到 main 布局中

    public void inital() {

        FragmentTransaction ft = fm.beginTransaction()
                .add(R.id.content_frame, fragment1)
                .add(R.id.content_frame, fragment2)
                .add(R.id.content_frame, fragment3)
                .add(R.id.content_frame, fragment4);
        ft.commit();

    }

  2. 隐藏所有的fragment

    private void fragmenthide() {
        FragmentTransaction ft = fm.beginTransaction()
                .hide(fragment1)
                .hide(fragment2)
                .hide(fragment3)
                .hide(fragment4);
        ft.commit();
    }

  3. 默认显示第一个fragment

    private void fragmentshow(Fragment fragment) {
        FragmentTransaction transaction = fm.beginTransaction()
                .show(fragment);
        transaction.commit();
    }

  4. 点击事件：点击切换界面（修改onClick）

    public void onClick(View view) {
        fragmenthide();
        if (view == linearLayout1) {
            fragmentshow(fragment1);
        } else if (view == linearLayout2) {
            fragmentshow(fragment2);
        } else if (view == linearLayout3) {
            fragmentshow(fragment3);
        } else if (view == linearLayout4) {
            fragmentshow(fragment4);
        }
    }

Fragment1.java (包含recycleView组件)

包含reycleView组件的Fragment1.java 

package com.example.homework;

import android.annotation.SuppressLint;
import android.content.Context;
import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.DividerItemDecoration;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import java.util.ArrayList;
import java.util.List;
import java.util.zip.Inflater;

public class Fragment1 extends Fragment {
    RecyclerView recyclerView;
    Myadapter adapter;
    List<String> list;
    Context context;

    //    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.tab1, container, false);
        context = view.getContext();
        recyclerView = view.findViewById(R.id.tab1);
        list = new ArrayList<String>();
        initData();
        LinearLayoutManager manager = new LinearLayoutManager(context);
        manager.setOrientation(LinearLayoutManager.VERTICAL);

        adapter = new Myadapter(context, list);

        recyclerView.setAdapter(adapter);
        recyclerView.setLayoutManager(manager);
        recyclerView.addItemDecoration(new DividerItemDecoration(context, LinearLayoutManager.VERTICAL));
        return view;

    }

    private void initData() {
        for (int i = 0; i < 9; i++) {
            list.add("这是第" + i + "行数据          ");
        }
    }

}

Myadapter.java 适配器

Myadater.java适配器 

package com.example.homework;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import java.util.List;
import java.util.zip.Inflater;

public class Myadapter extends RecyclerView.Adapter<Myadapter.Myholder> {
    Context context1;
    List<String> list1;

    public Myadapter(Context context, List list) {
        context1 = context;
        list1 = list;
    }

    @NonNull
    @Override
    public Myholder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context1).inflate(R.layout.item, parent, false);

        Myholder holder = new Myholder(view);
        return holder;
    }

    @Override
    public void onBindViewHolder(@NonNull Myholder holder, int position) {
        holder.textView.setText(list1.get(position));
    }

    @Override
    public int getItemCount() {
        return list1.size();
    }

    public class Myholder extends RecyclerView.ViewHolder {
        TextView textView;

        public Myholder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.item);
        }
    }
}

总体效果：

总体效果

Github仓库地址：

Error Github仓库 Mobile_Development

Last modification：November 11, 2023
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