Android开发-Android APP实操-1.项目创建及启动页面UI编码

一、项目创建及模拟器安装

1.选择新建一个project

2. 选择空模板

3.完成新project的设置

 下载完成后点击Finish

4.下载安卓模拟器

 选择Pixel7

点击下载R

 为虚拟机命名,选择竖屏,点击Finish.

5.点击启动,测试运行

 运行成功!

 

二、启动页面UI编码

 1.打开MainActivity.java文件，Ctrl+左键进入activity_main.xml

 

 

2.在activity_main.xml中点击右键，进入xml编写UI页面模式

 

 

3.修改activity_main.xml的代码，识别手写xml

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

 

4.AndroidManifest.xml：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"><applicationandroid:allowBackup="true"android:dataExtractionRules="@xml/data_extraction_rules"android:fullBackupContent="@xml/backup_rules"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:roundIcon="@mipmap/ic_launcher_round"android:supportsRtl="true"android:theme="@style/Theme.MyApplication1"tools:targetApi="31"><activityandroid:name=".MainActivity"android:exported="true"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application></manifest>

 

activity_main：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:background="@mipmap/ic_launcher"tools:context=".MainActivity"><RelativeLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:paddingLeft="44dp"android:paddingRight="44dp"android:layout_alignParentBottom="true"android:layout_marginBottom="90dp"><Buttonandroid:layout_alignParentLeft="true"android:layout_width="100dp"android:layout_height="50dp"android:text="@string/login"android:textSize="20sp"android:textColor="#ffffff"android:background="@drawable/shape_login_btn"/><Buttonandroid:layout_alignParentRight="true"android:layout_width="100dp"android:layout_height="50dp"android:text="@string/register"android:textSize="20sp"android:textColor="#ffffff"android:background="@drawable/shape_register_btn"/></RelativeLayout></RelativeLayout>

 

strings.xml：

<resources><string name="app_name">MyApplication1</string><string name="login">登录</string><string name="register">注册</string>
</resources>

shape_login_btn.xml:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"android:shape="rectangle"><corners android:radius="9dp" /><solid android:color="#c75fe768" />
</shape>

shape_register_btn.xml:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"android:shape="rectangle"><corners android:radius="9dp" /><solid android:color="#c75fe768" />
</shape>

 

 

5.启动运行