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PODownload profile image from facebook
 

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  1. PODownload profile image from facebook
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    <p>i am trying to download the facebook image profile with AsyncTask, however i get that the bitmap that downloaded is null and therefore i get a nullPointerExceprion.</p> <p>this is my code:</p> <pre><code>private synchronized void downloadAvatar(final String user_id,final ImageView iv) { AsyncTask&lt;Void, Void, Bitmap&gt; task = new AsyncTask&lt;Void, Void, Bitmap&gt;() { @Override public Bitmap doInBackground(Void... params) { URL fbAvatarUrl = null; Bitmap fbAvatarBitmap = null; try { fbAvatarUrl = new URL("http://graph.facebook.com/"+user_id+"/picture"); fbAvatarBitmap = BitmapFactory.decodeStream(fbAvatarUrl.openConnection().getInputStream()); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return fbAvatarBitmap; } @Override protected void onPostExecute(Bitmap result) { iv.setImageBitmap(result); } }; task.execute(); } </code></pre> <p>(user_id) is a exist profile id -i checked it in the debug mode..</p> <p>i get a nullPointerException at this line:</p> <pre><code>iv.setImageBitmap(result); </code></pre> <p>(result is null)</p> <p>also, here is the logcat:</p> <pre><code>04-12 14:16:40.140: E/AndroidRuntime(19304): FATAL EXCEPTION: main 04-12 14:16:40.140: E/AndroidRuntime(19304): java.lang.NullPointerException 04-12 14:16:40.140: E/AndroidRuntime(19304): at com.example.sal.ProfileActivity$15.onPostExecute(ProfileActivity.java:1998) 04-12 14:16:40.140: E/AndroidRuntime(19304): at com.example.sal.ProfileActivity$15.onPostExecute(ProfileActivity.java:1) 04-12 14:16:40.140: E/AndroidRuntime(19304): at android.os.AsyncTask.finish(AsyncTask.java:602) 04-12 14:16:40.140: E/AndroidRuntime(19304): at android.os.AsyncTask.access$600(AsyncTask.java:156) 04-12 14:16:40.140: E/AndroidRuntime(19304): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615) 04-12 14:16:40.140: E/AndroidRuntime(19304): at android.os.Handler.dispatchMessage(Handler.java:99) 04-12 14:16:40.140: E/AndroidRuntime(19304): at android.os.Looper.loop(Looper.java:137) 04-12 14:16:40.140: E/AndroidRuntime(19304): at android.app.ActivityThread.main(ActivityThread.java:4575) 04-12 14:16:40.140: E/AndroidRuntime(19304): at java.lang.reflect.Method.invokeNative(Native Method) 04-12 14:16:40.140: E/AndroidRuntime(19304): at java.lang.reflect.Method.invoke(Method.java:511) 04-12 14:16:40.140: E/AndroidRuntime(19304): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 04-12 14:16:40.140: E/AndroidRuntime(19304): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556) 04-12 14:16:40.140: E/AndroidRuntime(19304): at dalvik.system.NativeStart.main(Native Method) </code></pre>
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    1. USAdir Rahamim
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    1. COStupid question, is fbAvatarBitmap downloaded?
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      1. PODownload profile image from facebook
      1. USJachu
    2. COi think that image is corretly downloaded,i have another problem it says that i cant set image in the ImageView because only the main thread in hierarchy can touch its views...so how can i pass the ImageView to this AsyncTask and put the bitmap in it? thanks alot
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      1. PODownload profile image from facebook
      1. USAdir Rahamim
    3. COIs the Asynktask being created from the UI?
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      1. USJachu
 

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