AndroidLuaExample

Import

dependencies {
    compile 'com.blakequ.luajava:luajava:${latest.version}'
}

<dependency>
  <groupId>com.blakequ.luajava</groupId>
  <artifactId>luajava</artifactId>
  <version>${latest.version}</version>
  <type>pom</type>
</dependency>

How to use

# luajava
-keep class org.keplerproject.luajava.**{*;}
# For native methods
-keepclasseswithmembernames class * {
    native <methods>;
}

1. init lua

private void initLua(){
        mLuaState = LuaStateFactory.newLuaState();
        mLuaState.openLibs();
        //push Log object to lua, in lua using like: Log:i(TAG, "this log can show in AS logcat window")
        try {
            mLuaState.pushObjectValue(Log.class);
            mLuaState.setGlobal("Log");
        } catch (LuaException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
    }

2. add lua file to raw

app/src/main/res/raw/luafile.lua

function GetVersion(info, intvalue)
    Log:i("LuaLog", info..intvalue)
    print('this log')
    return 1
end

3. invoke lua function

private void executeLuaFile()
    {
            mLuaState.getGlobal("GetVersion");
            mLuaState.pushString("reload lua test");// input params
            mLuaState.pushNumber(10);
            mLuaState.call(2, 1);//2 input, 1 output
            String result = mLuaState.toString(-1);
            if (result == null){
                System.out.println("GetVersion return empty value");
            }else {
                System.out.println("GetVersion return value"+result);
            }
    }

4. invoke lua and error handle

private void executeLuaFile2()
    {
            //in lua file not exist this method:GetNotMethod
            mLuaState.getGlobal("GetNotMethod");
            mLuaState.pushString("reload lua test");// input params
            mLuaState.pushNumber(10);//not use pushInteger
            //if using call will throw exception(can not catch), so you must use pcall
            //success to invoke method if return 0, otherwise is error.
            int retCode = mLuaState.pcall(2, 1, -1);//2 input, 1 output
            String result = mLuaState.toString(-1);
            if (retCode != 0){
                LogUtils.e(TAG, "Fail to invoke GetNotMethod by lua errorCode:"+retCode+" errorMsg:"+result);
            }else {
                if (result == null){
                    System.out.println("GetVersion return empty value");
                }else {
                    System.out.println("GetVersion return value"+result);
                }
            }
    }

Link