Databases
StackOverflow2013
Postsdbo
PONull Pointer Exception when posting a picture to Facebook wall (android)
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PONull Pointer Exception when posting a picture to Facebook wall (android)
    primarykey
    data
    text
    <p>My app is meant to allow users to take a picture and then upload it to their Facebook wall. The following code is very similar to many other examples of working code given on other SO questions pertaining to this exact same problem, yet still gives me the null pointer exception:</p> <pre><code> private void postOnWall() { final String response = ""; try { Bundle params = new Bundle(); params.putString("message", getMessage()); params.putByteArray("picture", byteArray); mAsyncRunner.request(me/feed, params, "POST", new SampleUploadListener(), null); } catch (Exception e) { e.printStackTrace(); } } </code></pre> <p>I would simply like to get the image upload working before I can move on to adding the message with it. Any ideas?</p> <p>EDIT: Here is the SampleUploadListener() that goes with the AsyncRunner(...) line:</p> <pre><code>public class SampleUploadListener extends BaseRequestListener { public void onComplete(final String response, final Object state) { try { // process the response here: (executed in background thread) Log.d("Facebook-Example", "Response: " + response.toString()); JSONObject json = Util.parseJson(response); final String src = json.getString("src"); // then post the processed result back to the UI thread // if we do not do this, an runtime exception will be generated // e.g. "CalledFromWrongThreadException: Only the original // thread that created a view hierarchy can touch its views." } catch (JSONException e) { Log.w("Facebook-Example", "JSON Error in response"); } catch (FacebookError e) { Log.w("Facebook-Example", "Facebook Error: " + e.getMessage()); } } @Override public void onFacebookError(FacebookError e, Object state) { // TODO Auto-generated method stub } } </code></pre> <p>LogCat:</p> <pre><code>06-22 13:23:45.136: W/System.err(20667): java.lang.NullPointerException 06-22 13:23:45.136: W/System.err(20667): at com.uncc.cci.TrashPickup.TrashPickupActivity.postwall(TrashPickupActivity.java:475) 06-22 13:23:45.136: W/System.err(20667): at com.uncc.cci.TrashPickup.TrashPickupActivity$5$1.onClick(TrashPickupActivity.java:230) 06-22 13:23:45.140: W/System.err(20667): at android.view.View.performClick(View.java:3511) 06-22 13:23:45.140: W/System.err(20667): at android.view.View$PerformClick.run(View.java:14105) 06-22 13:23:45.140: W/System.err(20667): at android.os.Handler.handleCallback(Handler.java:605) 06-22 13:23:45.140: W/System.err(20667): at android.os.Handler.dispatchMessage(Handler.java:92) 06-22 13:23:45.140: W/System.err(20667): at android.os.Looper.loop(Looper.java:137) 06-22 13:23:45.140: W/System.err(20667): at android.app.ActivityThread.main(ActivityThread.java:4424) 06-22 13:23:45.144: W/System.err(20667): at java.lang.reflect.Method.invokeNative(Native Method) 06-22 13:23:45.144: W/System.err(20667): at java.lang.reflect.Method.invoke(Method.java:511) 06-22 13:23:45.144: W/System.err(20667): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 06-22 13:23:45.144: W/System.err(20667): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 06-22 13:23:45.148: W/System.err(20667): at dalvik.system.NativeStart.main(Native Method) </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USDavid B
    1. USDavid B
    plurals
    1. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. CODo you have a picture to be loaded? `NullPointerException` is usually thrown when an `Object` is called while it is `null` when it should not be `null`.
      singulars
      1. PONull Pointer Exception when posting a picture to Facebook wall (android)
      1. USJason L
    2. COWhich line (consult LogCat or post it)?
      singulars
      1. PONull Pointer Exception when posting a picture to Facebook wall (android)
      1. USMichał K
    3. CO@Yawus: 'byteArray' is a byte array from a bitmap that I've already handled. I checked it to see if it was null and it wasn't.
      singulars
      1. PONull Pointer Exception when posting a picture to Facebook wall (android)
      1. USDavid B
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload