Rhino를 사용하여 java가 javascript를 실행하도록 하는 방법 인스턴스
Java에서 js의 함수를 실행하고 js에서 Java를 호출하는 방법, 코드:
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView text1 = (TextView) findViewById(android.R.id.text1);
TextView text2 = (TextView) findViewById(android.R.id.text2);
text1.setText(runScript(JAVA_CALL_JS_FUNCTION, "Test", new String[] {}));
text2.setText(runScript(JS_CALL_JAVA_FUNCTION, "Test", new String[] {}));
}
/** Java js */
private static final String JAVA_CALL_JS_FUNCTION = "function Test(){ return ' java call js Rhino'; }";
/** js Java */
private static final String JS_CALL_JAVA_FUNCTION = //
"var ScriptAPI = java.lang.Class.forName(\"" + MainActivity.class.getName() + "\", true, javaLoader);" + //
"var methodRead = ScriptAPI.getMethod(\"jsCallJava\", [java.lang.String]);" + //
"function jsCallJava(url) {return methodRead.invoke(null, url);}" + //
"function Test(){ return jsCallJava(); }";
/**
* JS
*
* @param js js
* @param functionName js
* @param functionParams js
* @return
*/
public String runScript(String js, String functionName, Object[] functionParams) {
Context rhino = Context.enter();
rhino.setOptimizationLevel(-1);
try {
Scriptable scope = rhino.initStandardObjects();
ScriptableObject.putProperty(scope, "javaContext", Context.javaToJS(MainActivity.this, scope));
ScriptableObject.putProperty(scope, "javaLoader", Context.javaToJS(MainActivity.class.getClassLoader(), scope));
rhino.evaluateString(scope, js, "MainActivity", 1, null);
Function function = (Function) scope.get(functionName, scope);
Object result = function.call(rhino, scope, scope, functionParams);
if (result instanceof String) {
return (String) result;
} else if (result instanceof NativeJavaObject) {
return (String) ((NativeJavaObject) result).getDefaultValue(String.class);
} else if (result instanceof NativeObject) {
return (String) ((NativeObject) result).getDefaultValue(String.class);
}
return result.toString();//(String) function.call(rhino, scope, scope, functionParams);
} finally {
Context.exit();
}
}
public static String jsCallJava(String url) {
return " js call Java Rhino";
}
}
주의, 헷갈릴 때 js.jar가 헷갈릴 수 있으니 문장 4.1의 방법을 참조하십시오.