Eclipse的调试Android应用程序

本文介绍了Eclipse的调试Android应用程序 - 调试器显示错误的行执行的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

而在我的应用程序执行Twitter的整合，我发现Eclipse调试器下面奇怪。是什么原因造成的？

While implementing Twitter integration in my app, I discovered the following oddness of the Eclipse debugger. What is causing this?

我使用这个AsyncTask的使用twitter4j 3.0.3从Twitter获得一个请求令牌。

I'm using this AsyncTask for getting a request token from twitter using twitter4j 3.0.3.

public class TwitterRequestAsync extends AsyncTask<Void, Void, RequestToken> { private Context context; public TwitterRequestAsync(Context context) { this.context = context; } @Override protected RequestToken doInBackground( Void... params ) { Twitter twitter = getTwitter(); // getTwitter() is in enclosing class try { RequestToken token = twitter.getOAuthRequestToken(); return token; } catch (TwitterException e) { Log.e( TAG, e.getMessage(), e ); return null; } } @Override protected void onPostExecute( RequestToken result ) { super.onPostExecute( result ); if ( result != null ) { // stuffs concerning request token here } } }

当我调试这个code，似乎有getOAuthRequestToken（）执行时抛出一个异常，下一行，调试器显示执行的是catch子句中，返回null;

When I debug this code it appears that there is an exception thrown when getOAuthRequestToken() executes and the next line that the debugger shows executing is in the catch clause, return null;

然而，返回给onPostExecute（...）的结果是一个有效的请求令牌，所以调试器做一些奇怪的。我清理我的项目，每个多次在这一行为没有变化重新启动Eclipse的。我是不是坏了？

However, the result that is returned to onPostExecute(...) is a valid request token, so the debugger is doing something weird. I've cleaned my project and restarted Eclipse each multiple times with no change in this behavior. Am I broken?

推荐答案

这是一个已知的问题。看来，它可能是与Dalvik虚拟机中的问题。该方法的最后一个返回语句显示在调试器来执行

This is a known issue. It appears that it could be a problem with the Dalvik VM. The last return statement of the method is shown to execute in the debugger.

更改doInBackground身体：

Changing the doInBackground body to:

@Override protected RequestToken doInBackground( Void... params ) { Twitter twitter = getTwitter(); RequestToken token = null; try { token = twitter.getOAuthRequestToken(); } catch (TwitterException e) { Log.e( TAG, e.getMessage(), e ); } return token; }

使执行出现继续如预期。

Causes execution to appear to proceed as expected.

请参阅的groups.google/forum/?fromgroups=#!topic/android-developers/DEU6JmdyFyM对于一个老提这个问题的一个链接到一个更老的提及。终于有人创造了这一个问题在 https：//开头code.google / p /安卓/问题/细节？ID = 34193 。

See groups.google/forum/?fromgroups=#!topic/android-developers/DEU6JmdyFyM for an old mention of the problem with a link to an even older mention. Someone finally created an issue for this at code.google/p/android/issues/detail?id=34193.