相关疑难解决方法(0)

我尝试通过Facebook API连接Facebook,我按照这个例子:https://github.com/facebook/facebook-android-sdk/tree/master/examples/simple

一切都还可以,但是当我尝试编辑一些代码时,我的意思是我希望在登录成功后显示对话框发布消息,如下所示:

public void onAuthSucceed() {
        mText.setText("You have logged in! ");   
        //This is the code to call the post message dialog.                     
        mFacebook.dialog(Example.this, "feed",new SampleDialogListener());   
    }

我在logcat中收到此错误:

03-02 13:32:08.629: E/AndroidRuntime(14991): android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@405180f8 is not valid; is your activity running?
03-02 13:32:08.629: E/AndroidRuntime(14991):    at android.view.ViewRoot.setView(ViewRoot.java:532)
03-02 13:32:08.629: E/AndroidRuntime(14991):    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
03-02 13:32:08.629: E/AndroidRuntime(14991):    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
03-02 13:32:08.629: E/AndroidRuntime(14991):    at android.view.Window$LocalWindowManager.addView(Window.java:424)
03-02 13:32:08.629: E/AndroidRuntime(14991):    at android.app.Dialog.show(Dialog.java:241)
03-02 13:32:08.629: E/AndroidRuntime(14991):    at com.facebook.android.Facebook.dialog(Facebook.java:780)
03-02 13:32:08.629: …

写不好

if (b == false) //...

while (b != true) //...

是不是总是更好,而不是写:

if (!b) //...

while (!b) //...

据推测,性能没有差异(或者存在？),但是如何衡量两者之间的显性,简洁性,清晰度,可读性等？

更新

为了限制主观性,我还要感谢来自权威编码风格指南的任何引用,这些引用始终是优选的,或者在何时使用.

注意:变量名称b仅用作示例,ala foo和bar.