java javascript引擎_Android平台的JavaScript引擎 DuktapeJava
软件介绍
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
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