android动态获取权限空指针异常

原生API调用:
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, PERMISSIONS_STORAGE, 1);
}

js代码
var Context = plus.android.runtimeMainActivity();
var res = plus.android.invoke("android.support.v4.app.ActivityCompat", "checkSelfPermission", Context, "android.permission.CAMERA");
var PERMISSIONS_STORAGE = new Array();
PERMISSIONS_STORAGE.push("android.permission.CAMERA");
if(res != "0") {
　plus.android.invoke("android.support.v4.app.ActivityCompat", "requestPermissions", Context, PERMISSIONS_STORAGE, 1);
}

问题已解决 离线打包运行正常