add some files for building on Linux

src/build-scripts/build-java.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+set -e
+
+#unset ANDROID_NDK_HOME ANDROID_NDK
+
+pushd ../java/
+
+pushd JavaFileStorageTest-AS
+./gradlew assemble
+popd
+
+pushd KP2ASoftkeyboard_AS
+./gradlew assemble
+popd
+
+pushd Keepass2AndroidPluginSDK2
+./gradlew assemble
+popd
+
+pushd KP2AKdbLibrary
+./gradlew assemble
+popd
+
+popd

src/build-scripts/build-native.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+set -e
+
+pushd ../java/argon2
+ndk-build
+popd

src/build-scripts/linux-build.md

@@ -0,0 +1,29 @@
+## Setup build environment
+* install Android SDK
+* install Android NDK
+* install dotnet8
+
+```
+
+#from https://dotnet.microsoft.com/en-us/download/dotnet/thank-you/sdk-8.0.407-linux-x64-binaries
+wget https://download.visualstudio.microsoft.com/download/pr/9d07577e-f7bc-4d60-838d-f79c50b5c11a/459ef339396783db369e0432d6dc3d7e/dotnet-sdk-8.0.407-linux-x64.tar.gz
+mkdir -p $HOME/dotnet && tar zxf dotnet-sdk-8.0.407-linux-x64.tar.gz -C $HOME/dotnet
+export DOTNET_ROOT=$HOME/dotnet
+export PATH=$PATH:$HOME/dotnet
+
+```
+
+## Build Keepass2Android
+
+```
+git clone --recurse-submodules https://github.com/PhilippC/keepass2android.git
+cd keepass2android/src/build-scripts
+./build-java.sh && ./build-native.sh
+cd ..
+cp Kp2aBusinessLogic/Io/DropboxFileStorageKeysDummy.cs Kp2aBusinessLogic/Io/DropboxFileStorageKeys.cs
+cd keepass2android-app
+ln -s Manifests/AndroidManifest_debug.xml AndroidManifest.xml
+dotnet workload restore
+dotnet restore
+dotnet build
+```