E2E script to run on Android emulator (#117)

* E2E script to run on Android emulator

* Simplify stuff

scripts/android_example.sh

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+set -eu
+
+cd ${LLAMA_FAST_ROOT}
+echo "Inside: $LLAMA_FAST_ROOT"
+
+which curl
+
+if [ "$(uname)" == "Darwin" -a "$(uname -m)" == "arm64" ]; then
+  JAVA_URL="https://download.oracle.com/java/17/archive/jdk-17.0.10_macos-aarch64_bin.tar.gz"
+  SDK_MANAGER_URL="https://dl.google.com/android/repository/commandlinetools-mac-11076708_latest.zip"
+  ANDROID_ABI=arm64-v8a
+elif [ "$(uname)" == "Linux" -a "$(uname -m)" == "x86_64" ]; then
+  JAVA_URL="https://download.oracle.com/java/17/archive/jdk-17.0.10_linux-x64_bin.tar.gz"
+  SDK_MANAGER_URL="https://dl.google.com/android/repository/commandlinetools-linux-11076708_latest.zip"
+  ANDROID_ABI=x86_64
+else
+  echo "Unsupported platform $(uname) $(uname -m)"
+  exit -1
+fi
+
+mkdir -p ${LLAMA_FAST_ROOT}/build/android
+pushd ${LLAMA_FAST_ROOT}/build/android
+
+echo "Download Java 17"
+curl "${JAVA_URL}" -o jdk-17.0.10.tar.gz
+
+echo "Unzip Java 17"
+tar xf jdk-17.0.10.tar.gz
+
+if [ "$(uname)" == "Darwin" -a "$(uname -m)" == "arm64" ]; then
+  export JAVA_HOME="$(pwd)"/jdk-17.0.10.jdk/Contents/Home
+  export PATH="$JAVA_HOME/bin:$PATH"
+elif [ "$(uname)" == "Linux" -a "$(uname -m)" == "x86_64" ]; then
+  export JAVA_HOME="$(pwd)"/jdk-17.0.10
+  export PATH="$JAVA_HOME/bin:$PATH"
+fi
+
+mkdir -p sdk/cmdline-tools/latest
+
+echo "Download Android SDK Manager"
+curl "${SDK_MANAGER_URL}" -o commandlinetools.zip
+
+echo "Unzip Android SDK Manager"
+unzip commandlinetools.zip
+mv cmdline-tools/* sdk/cmdline-tools/latest
+export PATH="$(realpath sdk/cmdline-tools/latest/bin):$PATH"
+
+
+export ANDROID_HOME="$(realpath ./sdk)"
+export ANDROID_SDK_ROOT="$ANDROID_HOME"
+sdkmanager "platforms;android-34"
+sdkmanager "ndk;25.0.8775105"
+sdkmanager "platform-tools"
+export ANDROID_NDK="$ANDROID_HOME/ndk/25.0.8775105"
+sdkmanager "emulator"
+sdkmanager "system-images;android-34;google_apis;${ANDROID_ABI}"
+
+popd
+
+pushd build/src/executorch/examples/demo-apps/android/LlamaDemo
+./gradlew :app:setup
+./gradlew :app:build
+popd
+
+avdmanager create avd --name "llama-fast" --package "system-images;android-34;google_apis;${ANDROID_ABI}"
+sdk/emulator/emulator @llama-fast &
+
+adb wait-for-device
+adb shell mkdir /data/local/tmp/llama
+adb push stories15M.pte /data/local/tmp/llama
+adb push checkpoints/stories15M/tokenizer.bin /data/local/tmp/llama
+adb install -t build/src/executorch/examples/demo-apps/android/LlamaDemo/app/build/outputs/apk/debug/app-debug.apk