diff --git a/tools/unix-ci/before-install.sh b/tools/unix-ci/before-install.sh
index 7145a9de42..f2a2aa2dac 100755
--- a/tools/unix-ci/before-install.sh
+++ b/tools/unix-ci/before-install.sh
@@ -10,6 +10,13 @@ CURL="curl --retry 999 --retry-max-time 0"
 
 function install_android_sdk()
 {
+    # the since openjdk is free, refer to: https://openjdk.java.net/
+    # download page: https://jdk.java.net/17/
+    echo "Installing openjdk17 ..."
+    curl https://download.java.net/java/GA/jdk17.0.2/dfd4a8d0985749f896bed50d7138ee7f/8/GPL/openjdk-17.0.2_linux-x64_bin.tar.gz -o ./openjdk-17.0.2_linux-x64_bin.tar.gz
+    tar xzvf openjdk-17.0.2_linux-x64_bin.tar.gz
+    export JAVA_HOME=`pwd`/jdk-17.0.2
+
     echo "Installing android ndk ..."
     # sudo curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
     # sudo python get-pip.py