After you installed android studio, you still need to configure some android SDK environment variables then you can use it easily. This article will tell you how to correctly configure SDK environment variable such as ANDROID_HOME, PATH etc.
When you add a new dependency library in android project, you may find it need higher android sdk level such as version 27 or higher to compile and run. So you should change the project sdk version to fit the needs in such case.
When you use android widget in layout xml or java code, you may encounter error messages like Call requires API level 23 (current min is 17): . This means your current android minimum sdk version is 1.7, which is too low to use this widget. You need to change it to 23. This article will …