"Error:Cause: failed to find target with hash string 'android-19' in:
E:\android\android_sdk"
but I have modified SDK path as "E:\android\android_sdk_19\Android\Android\sdk"
,which is shown in the pic below.
I changed Project structure-SDK Location as "E:\android\android_sdk_19\Android\Android\sdk"
too.
This error hints that you don't have the SDK for Android-19, so you just click Open Android SDK Manager
and install "Android 4.4.2 (API 19)":
Then rebuild the project.