问如何在AndroidSDK4.0中将自定义故事直接发布到用户的Facebook墙上？

EN

// Create object
JSONObject myObject=new JSONObject();
try {
    myObject.put("og:type", "my_namespace:my_object");
    myObject.put("og:title", facebookStoryTitle);
    myObject.put("og:description", facebookStoryDescription);
    myObject.put("place:location:latitude", facebookPlaceLat);
    myObject.put("place:location:longitude", facebookPlaceLon);
} catch (JSONException e) {
    String toastText = "JSON Error: " + e.getMessage();
    Toast.makeText(getApplicationContext(), toastText, 
        Toast.LENGTH_SHORT).show();
    return;
}

// Create action
Bundle params = new Bundle();
params.putInt("expires_in", facebookStoryExpires);
params.putString("my_object", myObject.toString());

// Create request
GraphRequest request = new GraphRequest(AccessToken.getCurrentAccessToken(), 
    "me/my_namespace:my_action", params, HttpMethod.POST, 
    new GraphRequest.Callback() {
    @Override
    public void onCompleted(GraphResponse response) {

        FacebookRequestError error = response.getError();
        if (error != null) {
            // Display User Error Message
            String toastText = error.getErrorUserMessage(); 
            Toast.makeText(getApplicationContext(), toastText,
            Toast.LENGTH_LONG).show();
            return;             
        } else {
            // DEBUG: Display Response
            String toastText = response.toString(); 
            Toast.makeText(getApplicationContext(), toastText,
            Toast.LENGTH_LONG).show();
            return;                                 
        }
    }
});

// Send Request
request.executeAsync();