Add instructions for where to get android SDK. (#6581)

It's not obvious that SDK 21 is required, or where to get it since it's not available on the main android SDK site. Adding instructions as part of the hint so new developers have some guidance.
project-chip · Jul 7, 2021 · 1583960 · 1583960
1 parent 2c67bcf
commit 1583960
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/gn_build.sh b/gn_build.sh
@@ -114,6 +114,8 @@ if [[ -d "${ANDROID_NDK_HOME}/toolchains" && -d "${ANDROID_HOME}/platforms" ]];
 else
     echo
     echo "Hint: Set \$ANDROID_HOME and \$ANDROID_NDK_HOME to enable building for Android"
+    echo "      The required android sdk platform version is 21. It can be obtained from"
+    echo "      https://dl.google.com/android/repository/android-21_r02.zip"
 fi
 
 echo