Update Dockerfile

Dockerfile

@@ -1,24 +1,20 @@
-# Reference: https://dev.to/lavolpe/gitlab-ci-for-android-2021-update-2hhl
+FROM openjdk:8-jdk
 
-FROM openjdk:11-jdk
+MAINTAINER Seanghay
 
-
-ENV ANDROID_COMPILE_SDK=30
-ENV ANDROID_BUILD_TOOLS=30.0.3
-ENV ANDROID_SDK_TOOLS=6858069_latest
+ENV ANDROID_COMPILE_SDK=29
+ENV ANDROID_BUILD_TOOLS=29.0.2
+ENV ANDROID_SDK_TOOLS=4333796
 
 RUN apt-get --quiet update --yes
-RUN apt-get --quiet install --yes wget tar unzip lib32stdc++6 lib32z1
+RUN apt-get --quiet install --yes wget tar unzip lib32stdc++6 
 RUN apt-get -qq install curl
-RUN wget --quiet --output-document=android-sdk.zip https://dl.google.com/android/repository/commandlinetools-linux-${ANDROID_SDK_TOOLS}.zip
+RUN wget --quiet --output-document=android-sdk.zip https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_TOOLS}.zip
 RUN unzip -d android-sdk-linux android-sdk.zip
-RUN echo y | android-sdk-linux/cmdline-tools/bin/sdkmanager --sdk_root=. "platforms;android-${ANDROID_COMPILE_SDK}" >/dev/null
-RUN echo y | android-sdk-linux/cmdline-tools/bin/sdkmanager --sdk_root=. "platform-tools" >/dev/null
-RUN echo y | android-sdk-linux/cmdline-tools/bin/sdkmanager --sdk_root=. "build-tools;${ANDROID_BUILD_TOOLS}" >/dev/null
-
-ENV ANDROID_SDK_ROOT=$PWD
-ENV PATH=$PATH:$PWD/platform-tools/
-
-RUN yes | android-sdk-linux/cmdline-tools/bin/sdkmanager --sdk_root=. --licenses
-
+RUN echo y | android-sdk-linux/tools/bin/sdkmanager "platforms;android-${ANDROID_COMPILE_SDK}" >/dev/null
+RUN echo y | android-sdk-linux/tools/bin/sdkmanager "platform-tools" >/dev/null
+RUN echo y | android-sdk-linux/tools/bin/sdkmanager "build-tools;${ANDROID_BUILD_TOOLS}" >/dev/null
+ENV ANDROID_HOME=$PWD/android-sdk-linux
+ENV PATH=$PATH:$PWD/android-sdk-linux/platform-tools/
+RUN yes | android-sdk-linux/tools/bin/sdkmanager --licenses
 ENV GRADLE_USER_HOME=$PWD/.gradle