Update Dockerfile

Dockerfile

@@ -1,16 +1,50 @@
-FROM python:3.11-slim
-
-WORKDIR /app
+FROM eclipse-temurin:17-jdk-jammy
 
+ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    build-essential \
-    && rm -rf /var/lib/apt/lists/*
+      python3 python3-pip unzip curl ca-certificates git \
+    && rm -rf /var/lib/apt/lists/* \
+    && pip3 install --no-cache-dir flask
 
-COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+ENV ANDROID_HOME=/opt/android-sdk \
+    ANDROID_SDK_ROOT=/opt/android-sdk \
+    PATH=/opt/gradle/bin:/opt/android-sdk/cmdline-tools/latest/bin:$PATH
 
-COPY app.py .
+# Android command-line tools
+RUN mkdir -p /opt/android-sdk/cmdline-tools && cd /tmp \
+ && curl -fsSL -o ct.zip https://dl.google.com/android/repository/commandlinetools-linux-11076708_latest.zip \
+ && unzip -q ct.zip \
+ && mv cmdline-tools /opt/android-sdk/cmdline-tools/latest \
+ && rm ct.zip
 
-EXPOSE 7860
+# Gradle 9.3.1 (minimum required by AGP 9.1.x)
+RUN cd /tmp \
+ && curl -fsSL -o g.zip https://services.gradle.org/distributions/gradle-9.3.1-bin.zip \
+ && unzip -q g.zip -d /opt \
+ && mv /opt/gradle-9.3.1 /opt/gradle \
+ && rm g.zip
+
+# SDK packages (android-36.1 is optional; AGP can also fetch it itself)
+RUN yes | sdkmanager --licenses > /dev/null \
+ && sdkmanager "platform-tools" "platforms;android-36" "build-tools;36.0.0" \
+ && (sdkmanager "platforms;android-36.1" || true)
 
-CMD ["python", "app.py"]
+# HF Spaces runs the container as uid 1000
+RUN useradd -m -u 1000 user && chown -R user:user /opt/android-sdk
+USER user
+ENV GRADLE_USER_HOME=/home/user/.gradle
+WORKDIR /home/user/app
+# Optional warm-up: put your project zip in the Space repo as warmup.zip.
+# It is built once while the image is created, so every dependency (AGP, Kotlin,
+# Compose, Room...) is already cached and later builds skip the downloads.
+COPY --chown=user app.py warmup.zi[p] ./
+RUN if [ -f warmup.zip ]; then \
+      mkdir -p /tmp/warm && unzip -q warmup.zip -d /tmp/warm \
+      && R="$(dirname "$(find /tmp/warm -name 'settings.gradle*' | head -1)")" \
+      && cd "$R" && echo "sdk.dir=$ANDROID_HOME" > local.properties \
+      && gradle assembleDebug --console=plain --build-cache --no-configuration-cache \
+           -Dorg.gradle.jvmargs=-Xmx3g || true; \
+    fi; rm -rf /tmp/warm /home/user/app/warmup.zip
+
+EXPOSE 7860
+CMD ["python3", "app.py"]