java实现javascripr引擎_DuktapeJava-Android平台的JavaScript引擎

DuktapeJava 是针对 Android 平台封装的 Duktape  JavaScript 引擎；实现Javascript 和 Java的无缝调用。

初始化DuktapeEngnine

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); duktapeEngine = new DuktapeEngine(); duktapeEngine.put("activity",this); duktapeEngine.execute(AssetScript.toScript(getBaseContext(), "duk.js")); duktapeEngine.call("activityListener", "onCreate", savedInstanceState);} @Override protected void onDestroy() { if (duktapeEngine != null) { duktapeEngine.destory(); duktapeEngine = null; } super.onDestroy();}

duk.js javascript 代码示例

importClass("com.furture.react.R")importClass("android.view.View.OnClickListener")importClass("android.widget.Toast")importClass("java.lang.Runnable")var activityListener = {};activityListener.onCreate = function(){ print("activity onCreate onJavaScript"); activity.setContentView(R.layout.activity_duk) button1 = activity.findViewById(R.id.button1); button1.setOnClickListener(new OnClickListener(function(){ Toast.makeText(activity, "Button1 Clicked", Toast.LENGTH_SHORT).show(); var intent = new Intent(activity, "com.furture.react.activity.DetailActivity"); activity.startActivity(intent); })); button2 = activity.findViewById(R.id.button2); button2.setOnClickListener(new OnClickListener({ onClick:function(){ Toast.makeText(activity, "Button2 Clicked", Toast.LENGTH_SHORT).show(); } }));}activityListener.onStart = function(){ print("activity onStart");}activityListener.onResume = function(){ print("activity onResume");}activityListener.onPause = function(){ print("activity onPause");}activityListener.onStop = function(){ print("activity onStop");}activityListener.finish = function(){ print("activity finish" + num);}

Java 和 Javascript 的无缝调用

javascript 调用java方法示例：importClass("android.widget.Toast") Toast.makeText(activity, "Javascript toast", Toast.LENGTH_SHORT).show();

Java 还可以在 JavaScript 的对象方法示例：importClass("com.efurture.react.DataUtils")var data = {}; data.count = 10; data.getItem = function(var index){ return "Javascript Data " + index;} DataUtils.showData(data);

DataUtils.Java 代码示例：public class DataUtils{ public static void showData(JSRef data){ DuktapeEngine engine = data.getEngine(); int count = (Integer)engine.call(data, "count"); for(int i=0; i

项目github地址：https://github.com/gubaojian/DuktapeJava