犀牛为Android
问题描述：
我想在我的Android项目中使用犀牛 this以下。我黎明犀牛，并在lib加入js.jar。
这里是我的MainActivity：犀牛为Android
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
...
Context rhino = Context.enter();
// try{ // I commented it to catch the error
rhino.setLanguageVersion(Context.VERSION_1_2);
Scriptable scope = rhino.initStandardObjects();
Object result=rhino.evaluateString(scope,
"obj={a:1,b:['x','y']}", "MySource", 1,
null); // This line cannot be compiled
Scriptable obj = (Scriptable)scope.get("obj",scope);
Log.i("JS","obj " + (obj == result ? "==" : "!=") +" result");
Log.i("js","obj.a == " + obj.get("a", obj));
Scriptable b = (Scriptable) obj.get("b", obj);
// }catch (Exception e){
// Log.e("js","Exception.....");
// }
}
}
logcat的：
FATAL EXCEPTION: main
Process: com.behy.jsinand, PID: 7027
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.behy.jsinand/com.behy.jsinand.MainActivity}: java.lang.UnsupportedOperationException: can't load this type of class file
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.UnsupportedOperationException: can't load this type of class file
at java.lang.ClassLoader.defineClass(ClassLoader.java:300)
at org.mozilla.javascript.DefiningClassLoader.defineClass(DefiningClassLoader.java:27)
at org.mozilla.javascript.optimizer.Codegen.defineClass(Codegen.java:130)
at org.mozilla.javascript.optimizer.Codegen.createScriptObject(Codegen.java:85)
at org.mozilla.javascript.Context.compileImpl(Context.java:2394)
at org.mozilla.javascript.Context.compileString(Context.java:1335)
at org.mozilla.javascript.Context.compileString(Context.java:1324)
at org.mozilla.javascript.Context.evaluateString(Context.java:1076)
at com.behy.jsinand.MainActivity.onCreate(MainActivity.java:41)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
据complately根据样本项目，但我不undrestand为什么它不编译。
答
我修复了它（并且发布回答可能对你有帮助）
问题中链接的项目不适用于Android应用程序。
要在android中编译它，您应该将您的Context的optimizationLevel设置为-1： rhino.setOptimizationLevel（-1）;
它的工作原理！