Question

在以下代码行中......

ProgressDialog progressDialog = ProgressDialog.show(getBaseContext(), "LOADING_TITLE", "LOADING_MESSAGE");

代替getBaseContext（），我试过......

getApplicationContext() // returns "java.lang.NullPointerException"
getBaseContext() // returns "java.lang.NullPointerException"
(NativeActivity)getApplicationContext()
this // returns "The method show(Context, CharSequence, CharSequence) in the Type ProgressDialog is not applicable for the arguments(new Runnable(){}, String, String)"
NativeActivity.this // returns "java.lang.NullPointerException"
NativeActivity.this.getApplicationContext() // returns "java.lang.NullPointerException"
NativeExtension.context.getActivity().getBaseContext() // returns “android.view.WindowManager$BadTokenException: Unable to add window — token null is not for an application”
myActivity.getApplicationContext() // returns “android.view.WindowManager$BadTokenException: Unable to add window — token null is not for an application”
myActivity.getBaseContext() // returns “android.view.WindowManager$BadTokenException: Unable to add window — token null is not for an application”

其中。我不确定为什么它不起作用。在扩展FREContext的NativeExtensionContext中，我使用getActivity（）将活动传递给NativeActivity。一切正常但我得到一个“Nullpointerexception”或“android.view.WindowManager $ BadTokenException：无法添加窗口 - 令牌null不适用于应用程序”当我尝试获取对Context的引用时。

任何有使用Adobe AIR Native Extensions和/或Android Java经验的人都会很棒。

Answer 1

NativeExtension.context.getActivity().getBaseContext() // this should work.

我唯一能想到的就是确保你在Activity中工作。也就是说，您从FREFunction实例初始化的Activity。

Answer 2

将此添加到您的班级：

public static FREContext myANEContext=null;

....
....

  ProgressDialog progressDialog = ProgressDialog.show(myANEContext.getActivity().getBaseContext(), "LOADING_TITLE", "LOADING_MESSAGE");

在使用您的课程之前，不要忘记传递FREFunction的值：

  public class MyANEfunction implements FREFunction{


    @Override
      public FREObject call(final FREContext context, FREObject[] args) {
      try{
            myANEClass.myANEContext=context;

         ....

如何在Adobe AIR Native Extension中获取Context？

2 个答案: