1. 新建hello world总是不成功，提示The container ‘Android Dependencies‘ references non existing library

网上查资料有的说 clean 项目，然后 fix 之类的，各种不管用。又有人说 appcompat_v7是google自己的兼容包，右键你的工程-properties-android，就会发现在library里面有import appcompat_v7。删除就好，一举删掉后，新的问题又来了：

2.ActionBarActivity cannot be resolved to a type

在工程 /HelloAppPro/res/values/styles.xml 中还报错：error: Error retrieving parent for item: No resource found that matches the given name ‘Theme.AppCompat.Light‘.

于是有人说是android版本问题，把那段话删掉

    <style name="AppBaseTheme" parent="Theme.AppCompat.Light">
        <!--
            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
        -->
    </style>

    <style name="AppBaseTheme" parent="Theme.AppCompat.Light">
        <!-- API 11 theme customizations can go here. -->
    </style>

    <style name="AppBaseTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- API 14 theme customizations can go here. -->
    </style>

    <style name="AppTheme" parent="AppBaseTheme">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    </style>

删除后，values 没错误了，但是menu/main.xml又报错，提示如下

3. error: No resource identifier found for attribute ‘showAsAction‘ in package ‘com.hcar.helloapppro‘

    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        android:title="@string/action_settings"
        app:showAsAction="never"/>

于是把步骤2中的删先改为了：

    <style name="AppBaseTheme" parent="android:Theme.Light">
        <!--
            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
        -->
    </style>

可是 error: No resource identifier found for attribute ‘showAsAction‘ in package ‘com.hcar.helloapppro‘ 这个问题依然存在。

4.于是把所有能造成错误的都删除后，终于看起来没错误了，运行后报错：

[2014-10-25 16:02:12 - HelloAppPro] Launching a new emulator with Virtual Device ‘AVD4.4.2‘
[2014-10-25 16:02:12 - Emulator] emulator: ERROR: x86 emulation currently requires hardware acceleration!
[2014-10-25 16:02:12 - Emulator] Please ensure Intel HAXM is properly installed and usable.
[2014-10-25 16:02:12 - Emulator] CPU acceleration status: HAX kernel module is not installed!

5. 这个我能解决呀，于是兴高采烈的用 SDK manager 下载了 HAX 硬件加速。这时候突然想起来，是不是不用 x86 就不会出现这些问题。下载

重启eclipse后，发现R出现了！也不是那么神秘，就是把一些整数值用 int 赋给字符串（具有一些展现含义）。E:\Dev\adroid_Lab\sdk\extras\intel\Hardware_Accelerated_Execution_Manager，点击安装.exe 即可。

public final class R {
    public static final class attr {
    }
    public static final class dimen {
        /**  Default screen margins, per the Android Design guidelines.

         Example customization of dimensions originally defined in res/values/dimens.xml
         (such as screen margins) for screens with more than 820dp of available width. This
         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively).
         */
        public static final int activity_horizontal_margin=0x7f040000;
        public static final int activity_vertical_margin=0x7f040001;
    }
    public static final class drawable {
        public static final int ic_launcher=0x7f020000;
    }
    public static final class id {
        public static final int action_settings=0x7f080000;
    }
    public static final class layout {
        public static final int activity_main=0x7f030000;
    }
    public static final class menu {
        public static final int main=0x7f070000;
    }
    public static final class string {
        public static final int action_settings=0x7f050002;
        public static final int app_name=0x7f050000;
        public static final int hello_world=0x7f050001;
    }
    public static final class style {
        /**
        Base application theme, dependent on API level. This theme is replaced
        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
   
 Application theme.

            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
       
         */
        public static final int AppBaseTheme=0x7f060000;
    }
}

6. 重新启动后，等了大概1min，ok，终于出来了"Hello，Android"

[2014-10-25 16:32:15 - HelloAppPro] Performing com.hcar.helloapppro.MainActivity activity launch
[2014-10-25 16:32:15 - HelloAppPro] Automatic Target Mode: Preferred AVD ‘AVD4.4.2‘ is not available. Launching new emulator.
[2014-10-25 16:32:15 - HelloAppPro] Launching a new emulator with Virtual Device ‘AVD4.4.2‘

Androd 入门第一个项目几点注意