不能上传.txt文件到DropBox

Question

这是我的代码。我只是想创建一个空白的文本文件，并上传到DropBox的：

public class MainActivity extends Activity { 
     final static private String APP_KEY = "APP_KEY"; 
     final static private String APP_SECRET = "APP_SECRET"; 
     final static private AccessType ACCESS_TYPE = AccessType.APP_FOLDER; 
     private DropboxAPI<AndroidAuthSession> mDBApi; 
     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 

      setContentView(R.layout.activity_main); 
      AppKeyPair appKeys = new AppKeyPair(APP_KEY, APP_SECRET); 
      AndroidAuthSession session = new AndroidAuthSession(appKeys, ACCESS_TYPE); 
      mDBApi = new DropboxAPI<AndroidAuthSession>(session); 
      mDBApi.getSession().startAuthentication(MainActivity.this); 

      String filePath = getApplicationContext().getFilesDir().getPath().toString() + "/magnus-opus.txt"; 

      File file = new File(filePath); 


      try { 
       file.createNewFile(); 
      } catch (IOException e2) { 
       // TODO Auto-generated catch block 
       e2.printStackTrace(); 
      } 
      FileInputStream inputStream = null; 

      try { 
       inputStream = new FileInputStream(file); 
      } catch (FileNotFoundException e1) { 
       // TODO Auto-generated catch block 
       e1.printStackTrace(); 
      } 
      try { 
       Entry response = mDBApi.putFile("/magnum-opus.txt", inputStream, 
         file.length(), null, null); 
       Log.i("DbExampleLog", "The uploaded file's rev is: " + response.rev); 
      } catch (DropboxException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 

     } 

     @Override 
     public boolean onCreateOptionsMenu(Menu menu) { 
      // Inflate the menu; this adds items to the action bar if it is present. 
      getMenuInflater().inflate(R.menu.activity_main, menu); 
      return true; 
     } 

     /* Called when the application resumes */ 
     @Override 
     protected void onResume() 
     { 
      super.onResume(); 

      if (mDBApi.getSession().authenticationSuccessful()) { 
       try { 
        // Required to complete auth, sets the access token on the session 
        mDBApi.getSession().finishAuthentication(); 

        AccessTokenPair tokens = mDBApi.getSession().getAccessTokenPair(); 
       } catch (IllegalStateException e) { 
        Log.i("DbAuthLog", "Error authenticating", e); 
       } 
      } 
     } 

    } 

当这个运行时，应用程序创建成功在我的Dropbox的应用程序文件夹，但没有它的任何文件。我也碰到下面的错误跟踪：

05-11 13:06:42.911: W/System.err(10467): com.dropbox.client2.exception.DropboxUnlinkedException 
05-11 13:06:42.911: W/System.err(10467): at com.dropbox.client2.DropboxAPI.assertAuthenticated(DropboxAPI.java:2486) 
05-11 13:06:42.911: W/System.err(10467): at com.dropbox.client2.DropboxAPI.putFileRequest(DropboxAPI.java:2138) 
05-11 13:06:42.911: W/System.err(10467): at com.dropbox.client2.DropboxAPI.putFileRequest(DropboxAPI.java:1459) 
05-11 13:06:42.911: W/System.err(10467): at com.dropbox.client2.DropboxAPI.putFile(DropboxAPI.java:1419) 
05-11 13:06:42.921: W/System.err(10467): at com.example.receptionlookup.MainActivity.onCreate(MainActivity.java:77) 
05-11 13:06:42.921: W/System.err(10467): at android.app.Activity.performCreate(Activity.java:5066) 
05-11 13:06:42.921: W/System.err(10467): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1101) 
05-11 13:06:42.921: W/System.err(10467): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2307) 
05-11 13:06:42.921: W/System.err(10467): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387) 
05-11 13:06:42.921: W/System.err(10467): at android.app.ActivityThread.access$600(ActivityThread.java:151) 
05-11 13:06:42.921: W/System.err(10467): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1331) 
05-11 13:06:42.921: W/System.err(10467): at android.os.Handler.dispatchMessage(Handler.java:99) 
05-11 13:06:42.921: W/System.err(10467): at android.os.Looper.loop(Looper.java:155) 
05-11 13:06:42.921: W/System.err(10467): at android.app.ActivityThread.main(ActivityThread.java:5454) 
05-11 13:06:42.921: W/System.err(10467): at java.lang.reflect.Method.invokeNative(Native Method) 
05-11 13:06:42.921: W/System.err(10467): at java.lang.reflect.Method.invoke(Method.java:511) 
05-11 13:06:42.921: W/System.err(10467): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1029) 
05-11 13:06:42.921: W/System.err(10467): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:796) 
05-11 13:06:42.921: W/System.err(10467): at dalvik.system.NativeStart.main(Native Method) 

此错误跟踪似乎发生之前，我甚至有时间让我的应用程序（通过浏览器认证）访问Dropbox的，所以我不知道这是否是原因，或者只是一个警告。任何人都知道什么是错的？

Answer 1

移动在startAuthentication调用onResume事件处理程序后处理文件的代码，您可以在其中获得身份验证令牌。