My app crashes when trying to do something with a caught exception

Question

Ok

try {

            Log.d("request!", "starting");
            // getting product details by making HTTP request
            JSONObject json = jsonParser.makeHttpRequest(LOGIN_URL, "POST",
                    params);

            // check your log for json response
            Log.d("Login attempt", json.toString());

            }
        } catch (JSONException e) {


//ERROR WHEN INERTING CODE HERE!.

        }<code>

Hi guys!, I just want to know why my app crashes when I write code in the indicated place (see above).. If I leave it blank, nothing happens...

The thing is, I want to show a

Toast.makeText(MainActivity.this, "Couldn't reach the server", Toast.LENGTH_LONG).show();

Why do you think that is?. Thanks in advance

Do a project clean (Project ->Clean) and try again. If it again crashes, pls post the logcat messages. — prijupaul, Sep 24 '13 at 01:34
Please post all relevant code and logcat. From this, there is no way for us to know what's going on — codeMagic, Sep 24 '13 at 01:57

score 2 · Answer 1 · answered Sep 24 '13 at 01:41

2

Are you trying to access UI elements from outside the main thread by any chance? Try using Log.v instead of Toast and see if that helps.

answered Sep 24 '13 at 01:41

VJ Vélan Solutions

6,434
5
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Yesss :) it worked, thanks guys. I'm new to android. I can't access to UI elements if I'm not in the main thread! got it! – frankelot Sep 24 '13 at 02:09

score 0 · Accepted Answer · answered Sep 24 '13 at 01:42

0

I'm assuming because you're error is

"Couldn't reach the server"

you are trying to make network calls, which means your code is in a thread of some sort? You cannot touch UI elements from inside the main thread so move:

Toast.makeText(MainActivity.this, "Couldn't reach the server", Toast.LENGTH_LONG).show();

Into the postExecute() method of an AsyncTask or use a Handler

From the docs

Do not access the Android UI toolkit from outside the UI thread.

answered Sep 24 '13 at 01:42

nedaRM

1,837
1
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28

Yesss :) it worked, thanks guys. I'm new to android. I can't access to UI elements if I'm not in the main thread! got it! – frankelot Sep 24 '13 at 02:09

My app crashes when trying to do something with a caught exception

2 Answers2