Android学习1:Android开发环境搭建

安装文件:

http://www.android-studio.org/

android studio 2.0: https://dl.google.com/dl/android/studio/install/2.0.0.20/android-studio-bundle-143.2739321-windows.exe

安装路径:

studio: D:\Program Files\Android\Android Studio2

sdk: D:\Users\Thinkpad\AppData\Local\Android\sdk

新建Project forder: D:\Android\hello,新建一个Empty Activity

手机设置:

1.打开开发者模式

2. 设置usb调试

运行App:

点击android studio里的运行按钮, 选择连接的手机, 程序在手机启动成功.

启动的时候,手机会提示安装apk程序.

生成的MainActivity:

package com.example.lijingshou.myapplication4;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

 此外layout文件夹下,有个Activity对应的xml布局文件:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.lijingshou.myapplication4.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!" />
</RelativeLayout>

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.lijingshou.myapplication4">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <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>