植物录用APP

开发一个录入并展示____君迁子________植物信息的APP，基本功能如下：

1. 需要录入的基本信息：中文名、经济价值（入药、观赏、可食、工业材料、未发现），录入人姓名，录入人学号，录入时间；

2. 自行在百度（百度百科）或者必应中搜索该植物信息，将对应的信息录入，然后以某种格式保存在文件或数据库里；

3. 录入完毕后将该植物的录入的信息展示在另一个界面中。

一、Android项目

二、自己新建的、修改的、变化了的文件的内容

1. 文件名：activity_main.xml，界面布局文件

<?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:background="@mipmap/shi"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
    android:id="@+id/t_10"
    android:layout_width="149dp"
    android:layout_height="45dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginBottom="8dp"
    android:text="录入人信息"
    android:textSize="24sp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.617"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.564" />

    <TextView
        android:id="@+id/t_11"
        android:layout_width="149dp"
        android:layout_height="45dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="植  物  信  息"
        android:textSize="24sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.617"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.055" />

    <TextView
        android:id="@+id/t_6"
        android:layout_width="90dp"
        android:layout_height="40dp"
        android:text="录入人学号"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.305"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.743" />

    <TextView
        android:id="@+id/t_4"
        android:layout_width="84dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="经济价值"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.289"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.48" />

    <TextView
        android:id="@+id/t_5"
        android:layout_width="90dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="录入人姓名"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.295"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.665" />

    <TextView
        android:id="@+id/t_3"
        android:layout_width="84dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="分     布"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.289"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.376" />

    <Button
        android:id="@+id/btn_date"
        android:layout_width="102dp"
        android:layout_height="46dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="录入时间"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.279"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.841" />

    <TextView
        android:id="@+id/t_2"
        android:layout_width="84dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="特     征"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.289"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.282" />

    <TextView
        android:id="@+id/e_6"
        android:layout_width="200dp"
        android:layout_height="37dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.843" />

    <EditText
        android:id="@+id/e_5"
        android:layout_width="216dp"
        android:layout_height="48dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.746" />

    <EditText
        android:id="@+id/e_2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:ems="10"
        android:inputType="textPersonName"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.261" />

    <EditText
        android:id="@+id/e_3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:ems="10"
        android:inputType="textPersonName"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.358" />

    <EditText
        android:id="@+id/e_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:ems="10"
        android:inputType="textPersonName"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.162" />


    <TextView
        android:id="@+id/t_1"
        android:layout_width="84dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="中  文  名"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.289"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.185" />

    <Button
        android:id="@+id/btn_2"
        android:layout_width="239dp"
        android:layout_height="48dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="开始录入"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.673"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.965" />

    <TextView
        android:id="@+id/textView5"
        android:layout_width="58dp"
        android:layout_height="712dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:lineSpacingExtra="30sp"
        android:text="           植  物  信 息 录 入 "
        android:textAllCaps="false"
        android:textSize="36sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.035"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.333" />

    <Spinner
        android:id="@+id/spinner_1"
        android:layout_width="206dp"
        android:layout_height="39dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:entries="@array/use"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.461" />

    <EditText
        android:id="@+id/e_4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:ems="10"
        android:inputType="textPersonName"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.652" />


</androidx.constraintlayout.widget.ConstraintLayout>
 

2. 文件名：activity_main.xml，界面布局图片

3 文件名：sencond_activity_main.xml，界面布局文件

<?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"
    android:orientation="vertical"
    android:background="@mipmap/shi"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <EditText
        android:id="@+id/text_1"
        android:layout_width="183dp"
        android:layout_height="62dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:hint="输入植物名"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.787"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.196" />

    <TextView
        android:id="@+id/text_6"
        android:layout_width="184dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.824"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.823" />

    <TextView
        android:id="@+id/text_5"
        android:layout_width="184dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.824"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.555" />

    <TextView
        android:id="@+id/text_7"
        android:layout_width="184dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.824"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.73" />

    <TextView
        android:id="@+id/text_4"
        android:layout_width="184dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.824"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.637" />

    <TextView
        android:id="@+id/text_2"
        android:layout_width="184dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.824"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.383" />

    <TextView
        android:id="@+id/t_4"
        android:layout_width="92dp"
        android:layout_height="39dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="经 济 价 值"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.062"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.554" />

    <TextView
        android:id="@+id/t_6"
        android:layout_width="90dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="录 入 时 间"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.062"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.823" />

    <TextView
        android:id="@+id/t_7"
        android:layout_width="90dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="录入人学号"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.062"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.73" />

    <TextView
        android:id="@+id/t_5"
        android:layout_width="90dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="录入人姓名"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.062"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.637" />

    <TextView
        android:id="@+id/t_3"
        android:layout_width="96dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text=" 分          布"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.05"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.472" />

    <TextView
        android:id="@+id/t_2"
        android:layout_width="98dp"
        android:layout_height="41dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text=" 特         征"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.043"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.385" />

    <TextView
        android:id="@+id/t_1"
        android:layout_width="99dp"
        android:layout_height="44dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="中   文   名"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.041"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.217" />

    <TextView
        android:id="@+id/textView5"
        android:layout_width="201dp"
        android:layout_height="50dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="植物信息查询"
        android:textSize="30sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.081" />
    <TextView
        android:id="@+id/text_3"
        android:layout_width="184dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.824"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.472" />

    <Button
        android:id="@+id/button3"
        android:layout_width="123dp"
        android:layout_height="49dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="点击删除"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.863"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.905" />

    <Button
        android:id="@+id/button2"
        android:layout_width="239dp"
        android:layout_height="48dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="返回录用界面"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.378"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.988" />

    <Button
        android:id="@+id/button"
        android:layout_width="123dp"
        android:layout_height="49dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:text="点击查询"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.863"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.285" />
</androidx.constraintlayout.widget.ConstraintLayout>

 

4. 文件名：sencond_activity_main.xml，界面布局图片

5. 文件名：MainActivity.java

package com.example.helloworld;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.content.ContentValues;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import java.util.Calendar;
import java.util.Locale;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    Button btn_date;
    Button btn_2;
    EditText e_1;
    EditText e_2;
    EditText e_3;
    EditText e_4;
    EditText e_5;
    Spinner spinner_1;
    TextView e_date;
    Calendar calendar= Calendar.getInstance(Locale.CHINA);
    plant_database helper;
    SQLiteDatabase db;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        e_date=(TextView)findViewById(R.id.e_6);
        findViewById(R.id.btn_2).setOnClickListener(this);
        findViewById(R.id.btn_date).setOnClickListener(this);
        helper= new plant_database(this,"plant.db",null,1);
        db=helper.getWritableDatabase();
        e_1=(EditText) findViewById(R.id.e_1);
        e_2=(EditText) findViewById(R.id.e_2);
        e_3=(EditText) findViewById(R.id.e_3);
        e_4=(EditText) findViewById(R.id.e_4);
        e_5=(EditText) findViewById(R.id.e_5);
        spinner_1=(Spinner)findViewById(R.id.spinner_1);

    }

    public static void showDatePickerDialog(Activity activity, int themeResId, final TextView tv, Calendar calendar) {
        new DatePickerDialog(activity, themeResId, new DatePickerDialog.OnDateSetListener() {
            @Override
            public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                tv.setText( year + "年" + (monthOfYear + 1) + "月" + dayOfMonth + "日");
            }
        }
                , calendar.get(Calendar.YEAR)
                , calendar.get(Calendar.MONTH)
                , calendar.get(Calendar.DAY_OF_MONTH)).show();
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btn_date:
                showDatePickerDialog(this,3,e_date,calendar);
                break;
            case R.id.btn_2:

                String t1=e_1.getText().toString();
                String t2=e_2.getText().toString();
                String t3=e_3.getText().toString();
                String t4=spinner_1.getSelectedItem().toString();
                String t5=e_4.getText().toString();
                String t6=e_date.getText().toString();
                String t7=e_5.getText().toString();
                insert_1(t1,t2,t3,t4,t5,t6,t7);
                Toast.makeText(MainActivity.this,"录用成功",Toast.LENGTH_SHORT).show();
                Intent intent=new Intent(MainActivity.this,SencondAcitivity.class);
                startActivity(intent);
                break;
        }
    }
    public void insert_1(String v,String v1,String v2,String v3,String v4,String v5,String v6)
    {
        ContentValues values=new ContentValues();
        values.put("name",v);
        values.put("tz",v1);
        values.put("fb",v2);
        values.put("jz",v3);
        values.put("usename",v4);
        values.put("datetime",v5);
        values.put("userid",v6);
        db.insert("plant",null,values);
    }
}
 

6. 文件名：SencondAcitivity.java

package com.example.helloworld;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
public class SencondAcitivity extends AppCompatActivity implements View.OnClickListener {
    TextView text_1;
    TextView text_2;
    TextView text_3;
    TextView text_4;
    TextView text_5;
    TextView text_6;
    TextView text_7;
    Button button;
    SQLiteDatabase db;
    plant_database helper;
    String vi,v1,v2,v3,v4,v5,v6;
    String t1,t2,t3,t4,t5;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sencond_activity_main);
        findViewById(R.id.button).setOnClickListener(this);
        findViewById(R.id.button2).setOnClickListener(this);
        findViewById(R.id.button3).setOnClickListener(this);
        helper=new plant_database(this,"plant.db",null,1);
        db=helper.getWritableDatabase();
        text_1=(TextView) findViewById(R.id.text_1);
        text_2=(TextView) findViewById(R.id.text_2);
        text_3=(TextView) findViewById(R.id.text_3);
        text_4=(TextView) findViewById(R.id.text_4);
        text_5=(TextView) findViewById(R.id.text_5);
        text_6=(TextView)findViewById(R.id.text_6);
        text_7=(TextView) findViewById(R.id.text_7);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.button:
                if (text_1.getText().toString().trim().length()!=0){
                    vi=text_1.getText().toString();
                    select_1(vi);
                    //text_1.setText(v.toString());
                    text_2.setText(v1.toString());
                    text_3.setText(v2.toString());
                    text_4.setText(v3.toString());
                    text_5.setText(v4.toString());
                    text_6.setText(v5.toString());
                    text_7.setText(v6.toString());
                }
                else{ Toast.makeText(SencondAcitivity.this,"请输入植物中文名", Toast.LENGTH_LONG).show();}
                break;
            case R.id.button3:
                helper.delete(db, vi);
                Toast.makeText(SencondAcitivity.this,"删除成功",Toast.LENGTH_SHORT).show();
                break;
            case R.id.button2:
                Intent intent = new Intent();
                intent.setClass(SencondAcitivity.this, MainActivity.class);
                SencondAcitivity.this.startActivity(intent);//启动Activity
                break;

        }
    }
    public void select_1(String n){
        Cursor cursor =db.rawQuery("select * from plant where name=?",new String[]{ n });
        if (cursor.moveToFirst()) {
            //v=cursor.getString(cursor.getColumnIndex("name"));
            v1=cursor.getString(cursor.getColumnIndex("tz"));
            v2=cursor.getString(cursor.getColumnIndex("fb"));
            v3=cursor.getString(cursor.getColumnIndex("jz"));
            v4=cursor.getString(cursor.getColumnIndex("usename"));
            v5=cursor.getString(cursor.getColumnIndex("datetime"));
            v6=cursor.getString(cursor.getColumnIndex("userid"));
            cursor.close();
        }
    }
}

 

7 文件名： plant_database.java

package com.example.helloworld;
import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class plant_database extends SQLiteOpenHelper {
    public plant_database(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
        super(context, "plant.db", factory, version);
    }
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("CREATE TABLE plant(personid INTEGER PRIMARY KEY AUTOINCREMENT" +
                ",name VARCHAR(20)" +
                ",tz VARCHAR(20)," +
                "fb VARCHAR(20)" +
                ",jz VARCHAR(20)" +
                ",usename VARCHAR(20)" +
                ",datetime VARCHAR(20)" +
                ",userid VARCHAR(20))"
        );

    }
    @Override
    public void onUpgrade(SQLiteDatabase db, int i, int i1) {

    }
    public void delete(SQLiteDatabase db,String name) {
        String where = "name= ?";
        String[] whereArgs = {name + ""};
        db.delete("plant", where, whereArgs);
        db.close();
    }
    public void updata(SQLiteDatabase db, String name, String tz){
        ContentValues values=new ContentValues();
        String where = "name= ?";
        String[] whereArgs = {name + ""};
        // values.put("plantname",name);
        values.put("tezheng",tz);
        //values.put("fenbu",fb);
        //values.put("jjjz",jz);
        // values.put("username",usename);
        // values.put("userid",userid);
        //  values.put("usertime",datetime);
        db.update("plant", values,where, whereArgs);
        db.close();
    }
}
 

8 文件名： spinners.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="use">
        <item>   入   药   </item>
        <item>   观   赏   </item>
        <item>   可   食   </item>
        <item> 工 业 材 料 </item>
        <item>  未 发 现  </item>
    </string-array>
</resources>

9 文件名： AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:dist="http://schemas.android.com/apk/distribution"
    package="com.example.helloworld">
    <dist:module dist:instant="true" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".SencondAcitivity"></activity>
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

三、APP的调试或运行，显示运行的结果，查看生成的文件

（图一   信息录入界面）

（图二   点击录入时间按钮选择时间）

（图三   点击开始录入按钮跳转查询界面，提示录用成功）

（图四   点击查询按钮，如果未输入植物中文名将提示）

（图五   点击查询按钮，查询显示界面）

（图六   点击删除按钮，提示删除成功，数据库君迁子信息被删除）

（图七     数据库可视化界面）