java - 使用 JSNI 在 GWT 中使用原生 Phonegape js

Question

我想使用 JSNI 在 GWT 上运行此phonegap native 警报

navigator.notification.alert(
        'You are the winner!',  // message
         null,         // callback
        'Game Over',
        'Done'
  );

我已经尝试过这个:

public static native void testNativeAlert()/*-{

   navigator.notification.alert(
    'You are the winner!',  // message
     null,         // callback
    'Game Over',
    'Done');}-*/;

Answer 1

来自http://www.gwtproject.org/doc/latest/DevGuideCodingBasicsJSNI.html#writing ，不要忘记 $wnd 来访问全局属性!

public static native void alert(String msg) /*-{
  $wnd.alert(msg);
}-*/;

Note that the code did not reference the JavaScript window object directly inside the method. When accessing the browser’s window and document objects from JSNI, you must reference them as $wnd and $doc, respectively. Your compiled script runs in a nested frame, and $wnd and $doc are automatically initialized to correctly refer to the host page’s window and document.

因此，在您的情况下，您必须使用 $wnd 访问 navigator:

public static native void testNativeAlert()/*-{

   $wnd.navigator.notification.alert(
    'You are the winner!',  // message
    null,         // callback
    'Game Over',
    'Done');
}-*/;

<小时/>

旁注:文档不清楚，但您确定phonegap让callback为空吗？否则请进一步查看我上面链接的 JSNI 文档。