Android Wrapper ¶

User-Compiled Binaries ¶

Common Requirements¶

Compilation of the Android wrapper requires a few common wrapper pre-requisites

Furthermore, you will need to install swig, which can be obtained from http://www.swig.org/download.html for windows users (add the unzipped directory to your PATH variable), or from your package manager (apt, homebrew, etc.) on other platforms.

Windows¶

Follow the instructions for Linux & OSX, but the first call to cmake should read:

cmake .. -DCOOLPROP_ANDROID_MODULE=ON -G "MinGW Makefiles" -DNDK_PATH=c:/Downloads/android-ndk-r10e (change path based on your installation)

This change (telling CMake to use the MinGW generator with -G "MinGW Makefiles") is needed because by default on windows it tries to use the most-recent installed version of Visual Studio, which conflicts with the Android SDK.

Warning

As of Aug 2016, the version 12 of the NDK does not compile CoolProp correctly. You must use 10e for some reason. See also https://github.com/CoolProp/CoolProp/issues/1178

Linux & OSX¶

Install NDK from here: https://developer.android.com/ndk/downloads/index.html
To Build
- Check out the sources for CoolProp:
  git clone https://github.com/CoolProp/CoolProp --recursive
- Open the CMakeLists.txt file in the CoolProp directory for editing
- Within the COOLPROP_ANDROID_MODULE modify the command: set(ANDROID_PACKAGE_NAME "CoolProp") to reflect your package name
- Make and move into a build folder:
  mkdir -p CoolProp/build && cd CoolProp/build
- If a target architecture other than the default (armeabi) is desired, the ndk-build can be modified by editing wrappers/Android/Android.mk.template. For details see https://developer.android.com/ndk/guides/index.html
- Construct the makefile using CMake:
  cmake .. -DCOOLPROP_ANDROID_MODULE=ON -DNDK_PATH=~/Downloads/android-ndk-r10e (change path based on your installation)
- Now actually do the build:
  cmake --build .
To Incorporate into an Android Studio Project
- Copy the java files from the package directory (i.e build/com/example/myprogram) to the package directory of the android project
- Copy the the build/libs/armeabi folder containing the .so file to the app/src/main/jniLibs folder of the Android Project (you may have create the jniLibs folder).
- In the main activity of the Android Project add the code below so the CoolProp functions can be called as described in the java wrapper documentation:
  static { System.loadLibrary("CoolProp"); }

Example Code ¶

mainactivity.java

package com.example.coolprop.androidexample;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;


public class MainActivity extends ActionBarActivity {

    static {
        System.loadLibrary("CoolProp");
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        TextView CoolPropsDisplay = (TextView) findViewById(R.id.CoolPropsDisplay);
        CoolPropsDisplay.setText(Double.toString(CoolProp.PropsSI("T", "P", 101300, "Q", 0, "Water")));
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical">

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:textSize="40dp"
            android:gravity="center"
            android:id="@+id/CoolPropsDisplay"
            android:layout_weight="1"
            android:textAlignment="gravity" />

    </LinearLayout>

</RelativeLayout>

Android Wrapper¶

User-Compiled Binaries¶