Downgrading from API 24 to API 23

问题

I cant drag and drop items either on activity_main.xml file or content_main.xml file. From my research, I learned that I have to downgrade from android API 24 to android API 23, but when I click on API 24 image to downgrade I can't find API 23.

回答1:

Check the image and download API 23, then restart Android Studio and you will see API 23 too there.

You will see this window, then start the download:

回答2:

I think you are confusing rendering API level to application API level. You see, the icon above will render according to the API level you chose. That makes seance because some APIs have different overall design.

If you want to downgrade the application API you can change in the manifest (if you are using eclipse) OR change in the gradle settings(if you are using Android Studio) like so:

In the build.gradle(Module app):

    defaultConfig {
    applicationId "com.shlomi.alarm"
    minSdkVersion 17
    targetSdkVersion 24
    versionCode 1
    versionName "1.0"
    }

Insert your API level in minSdkVersion.

回答3:

Simply go to your res directory through your windows explorer there you may find folders like 1)drawable 2)drawable-v24 3)layouts and so on..... cut all the content from drawable-v24 and paste it into drawable folder. This solution worked for me. cheers.

来源：https://stackoverflow.com/questions/38660103/downgrading-from-api-24-to-api-23