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POProblem with first installation of android application from android market
 

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  1. POProblem with first installation of android application from android market
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    <p>I am accessing the internet to get information. The app is force closing when i m accessing the internet.If the app is deleted and re-installed it does not force close when i m accesing the internet .This is happening the first time the app is installed. Please help me figure this out.</p> <p>This is the stack trace -</p> <pre><code>java.lang.RuntimeException: Unable to start activity ComponentInfo{ListOfDealSites}: java.lang.NullPointerException at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) at android.app.ActivityThread.access$2300(ActivityThread.java:125) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:123) at android.app.ActivityThread.main(ActivityThread.java:4627) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:521) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NullPointerException at java.io.DataInputStream.readLine(DataInputStream.java:309) at ListOfDealSites.onCreate(ListOfDealSites.java:53) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) ... 11 more </code></pre> <p>It also says source method - DataInputStream.readLine()</p> <pre><code>public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.dealsites); InputStream in = null; try { // Connect to the server to get the list of deal sites in = OpenHttpConnection("Link to deal server"); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } try { DataInputStream dataIO = new DataInputStream(in); String strLine = null; int i = 0; while((strLine = dataIO.readLine())!= null) // Line 53------ { count = i; NEWDEALSITES[i++] = strLine; } dataIO.close(); in.close(); } catch (IOException e){ // TODO Auto-generated catch block e.printStackTrace(); } count_deals = count/2; newdeals = new String[count_deals+1]; newsites = new String[count_deals+1]; int j, k; for(j = 0, k = 0; k &lt; count; j++) { newdeals[j] = NEWDEALSITES[k++]; newsites[j] = NEWDEALSITES[k++]; } listOfDealSites = (ListView)findViewById(R.id.ListView01); listOfDealSites.setAdapter(new ArrayAdapter&lt;String&gt;(this,R.layout.row,newdeals)); } //Function to connect to the server. private InputStream OpenHttpConnection(String urlString) throws IOException { InputStream in = null; int response = -1; URL url = new URL(urlString); URLConnection conn = url.openConnection(); if (!(conn instanceof HttpURLConnection)) throw new IOException("Not an HTTP connection"); try{ HttpURLConnection httpConn = (HttpURLConnection) conn; httpConn.setAllowUserInteraction(false); httpConn.setInstanceFollowRedirects(true); httpConn.setRequestMethod("GET"); httpConn.connect(); response = httpConn.getResponseCode(); if (response == HttpURLConnection.HTTP_OK) { in = httpConn.getInputStream(); } } catch (Exception ex) { throw new IOException("Error connecting"); } return in; } </code></pre> <p>}</p>
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    1. USuser588132
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    1. CO@user588132: Post the code for ListOfDealSites.onCreate() and tell us which is line 53.
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    2. COI have edited my question...
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    3. COVariable 'in' could be null. You catch the exception but continue to use the var,
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