更改cordova项目的android目标(Changing the android target of a cordova project)

 我是cordova开发的新手，我使用此命令创建了我的第一个cordova项目，如以下站点https://cordova.apache.org/docs/en/4.0.0/guide_cli_index.md.html 
 
 cordova create hello com.example.hello HelloWorld
 
 使用这些命令为项目添加平台后， 
 
 cd hello
 cordova platform add android
 
 和命令行给出这些输出 
 
    Adding android project...
    Creating Cordova project for the Android platform:        
    Path: platforms\android
    Package: com.exampple.hell
    Name: helloWorld
    Android target: android-21
    Copying template files...
    Project successfully created.
 
 根据这个项目的Android目标是android-21但是在我的机器上安装了android SDK只有最高级别的android API级别19.所以当我将这些项目导入eclipse IDE以对项目进行进一步更改时它会在控制台上出错 
 
Unable to resolve target 'android-21'
 
 我将AndroidManifest.xml文件更改为 
 
<uses-sdk android:minSdkVersion="10" android:targetSdkVersion="19" /> 
 
 但仍然有问题。 
 
 我可以将平台添加到项目时将android目标更改为19，还是有另一种方法来修复此问题并使用android API级别19运行项目 

i'm new to cordova development and i created my first cordova project using this command as in following site https://cordova.apache.org/docs/en/4.0.0/guide_cli_index.md.html
 
 cordova create hello com.example.hello HelloWorld
 
After used these commands to add a platform to project,
 
 cd hello
 cordova platform add android
 
and command line gives these output
 
    Adding android project...
    Creating Cordova project for the Android platform:        
    Path: platforms\android
    Package: com.exampple.hell
    Name: helloWorld
    Android target: android-21
    Copying template files...
    Project successfully created.
 
according to this Android target of this project is android-21 but installed android SDK on my machine only has up to android API level 19. So when i import these project to eclipse IDE to make further changes to project it gives error on console
 
Unable to resolve target 'android-21'
 
I changed AndroidManifest.xml file as
 
<uses-sdk android:minSdkVersion="10" android:targetSdkVersion="19" /> 
 
but still have the problem.
 
can i change the android target to 19 when the platform is added to project or is there another way to fix this and run project with android API level 19 

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