AndroidStudio中Android与Lua最简单的调用

配置好LUA和NDK

一、Git上下载AndroLua项目，导入AndroidStudio
https://github.com/mkottman/AndroLua

二、将这个Module做为Module Dependencies，运行目标项目时，会出现这样一张操作界面

若将这个Module打包成jar，则不会出现此界面
Module的处理
1.build.gradle中，将plugin改为library

2.Module Setting中删除Application ID

3.jni->luajava->luajava.c修改include信息

4.make module，在build/intermediates/bundles/release 下得到jar文件classes.jar
5.将jar文件添加到目标Module中

三、android与lua文件的相互调用
res/raw/luatest.lua
luatest.lua

MainActivity.java

public class MainActivity extends Activity {    private LuaState mLuaState;    private EditText mFirst;    private EditText mSecond;    private TextView mResult;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mLuaState = LuaStateFactory.newLuaState();        mLuaState.openLibs();        mFirst = (EditText) this.findViewById(R.id.first);        mSecond = (EditText) this.findViewById(R.id.second);        mResult = (TextView) this.findViewById(R.id.result);        Button android = (Button) this.findViewById(R.id.android);        android.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                if (checkInput()) {                    mLuaState.LdoString(readStream(getResources().openRawResource(R.raw.luatest)));                    mLuaState.getField(LuaState.LUA_GLOBALSINDEX, "add");                    mLuaState.pushNumber(Integer.parseInt(mFirst.getText().toString()));                    mLuaState.pushNumber(Integer.parseInt(mSecond.getText().toString()));                    mLuaState.call(2, 1);//2个参数，1个返回值                    mLuaState.setField(LuaState.LUA_GLOBALSINDEX, "result");                    LuaObject result = mLuaState.getLuaObject("result");                    mResult.setText(result.toString());                }            }        });        Button lua = (Button) this.findViewById(R.id.lua);        lua.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                if (checkInput()) {                    mLuaState.LdoString(readStream(getResources().openRawResource(R.raw.luatest)));                    mLuaState.getField(LuaState.LUA_GLOBALSINDEX, "setResult");                    mLuaState.pushJavaObject(mResult);                    mLuaState.pushNumber(Integer.parseInt(mFirst.getText().toString()));                    mLuaState.pushNumber(Integer.parseInt(mSecond.getText().toString()));                    mLuaState.call(3, 0);//3个参数，0个返回值                }            }        });    }    private boolean checkInput() {        if (mFirst.getText().length() == 0 || mSecond.getText().length() == 0) {            Toast.makeText(MainActivity.this, "请输入数字", Toast.LENGTH_LONG).show();            return false;        }        return true;    }    private String readStream(InputStream is) {        try {            ByteArrayOutputStream bo = new ByteArrayOutputStream();            int i = is.read()；            while (i != -1) {                bo.write(i);                i = is.read();            }            return bo.toString();        } catch (IOException e) {            e.printStackTrace();        }        return "";    }}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <LinearLayout        android:layout_width="match_parent"        android:layout_height="50dp"        android:layout_margin="10dp"        android:gravity="center_vertical"        android:orientation="horizontal">        <EditText            android:id="@+id/first"            android:layout_width="100dp"            android:layout_height="wrap_content"            android:gravity="center"            android:inputType="number"            android:hint="first" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="+" />        <EditText            android:id="@+id/second"            android:layout_width="100dp"            android:layout_height="wrap_content"            android:gravity="center"            android:inputType="number"            android:hint="second" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="=" />        <TextView            android:id="@+id/result"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="\?" />    </LinearLayout>    <Button        android:id="@+id/android"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Android"/>    <Button        android:id="@+id/lua"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Lua"/></LinearLayout>