Upload Android image to php server error

Question

I am following the tutorial here along with somebody's help request here...

I am very new to Java/Android programming, and I'm not exactly sure how to 'launch' this section of code. In my AndroidManifest.xml I have it set as the first activity, assuming this would launch right when I started it:

    <activity
        android:name=".UploadImage"
        android:label="@string/title_activity_starting_point" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

Unfortunately it doesn't work this way, because whenever I launch the app it automatically 'stops unexpectedly.' Any other Java class that I put right here launches fine, so I assumed it was something in the code. I'm just not sure where it needs to be for me to get the code 'running', as every time I compile it the program crashes on my phone.

LogCat says it is unable to resolve this line of code:

String image_str = Base64.encodeBase64String(byte_arr);
// old code was String image_str = Base64.encodeBytes(byte_arr), 
// but this didn't compile for me and a comment on another website 
// said that encodeBase64String could replace it...apparently not?

<uses-permission android:name="android.permission.INTERNET"/> — Nirav Ranpara
– Nirav Ranpara, Commented Dec 7, 2012 at 8:02

323go · Accepted Answer · 2012-12-07 08:01:07Z

1

Welcome to Android.

First off, locate your logCat in Eclipse. It'll be your best friend (and source of much frustration).

Secondly, once you find your logCat, you're likely going to see a NetworkOnMainThread exception. That means that you're attempting to execute a Network request on the main UI thread, which would cause the screen to "freeze" and stutter. It's a no-no, and as of Android 4.0, it will crash your app.

There is a way to explicitly override that, but it'd be better if you learned to avoid that to begin with -- no difficult at all. Just use an AsyncTask.

Lastly, be sure you have INTERNET permission in your Manifest.

answered Dec 7, 2012 at 8:01

323go

14.3k6 gold badges37 silver badges41 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Isaac Askew Over a year ago

Okay, I see it. It says it was unable to resolve the conversion from Base64 - this line of code: String image_str = Base64.encodeBase64String(byte_arr); The old code was String image_str =Base64.encodeBytes(byte_arr);, but this wouldn't compile and somebody commented that the aforementioned line fixed it for them. Apparently not for me. :/

323go Over a year ago

Why don't you please edit your answer and add your code snipped, along with the relevant logcat. Hard to work out issues without context. And unless you're using "ancient" Android, brace yourself for the NetworkOnMainThread... ;)

Isaac Askew · Accepted Answer · 2012-12-07 08:19:12Z

0

Apparently the Base64 file I had entered got modified from the original one; the 'encodeBase64String' doesn't exist, and using:

int flag = 0;
String image_str = Base64.encodeToString(byte_arr, flag);

Fixed the problem.

answered Dec 7, 2012 at 8:19

Isaac Askew

1,2912 gold badges17 silver badges31 bronze badges

Collectives™ on Stack Overflow

Upload Android image to php server error

2 Answers 2

2 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related