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POAndroid Dynamically Adding Row To Table Null Exception
 

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  1. POAndroid Dynamically Adding Row To Table Null Exception
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    <p>I am trying to add a row to a table at run time but it is throwing a <code>NullPointerException</code> after it has printed <code>1</code>. The code is inside an Activity and I use a boolean flag <code>active</code> (set to true in the <code>onCreate()</code> method) to make sure the Activity has been instantiated. The only thing I think the exception can be referencing is <code>this</code> but I have made sure the class has been instantiated. Can someone say what is wrong please?</p> <pre><code>if (node.getNodeType() == Node.ELEMENT_NODE) { System.out.println("adding row..."); Element element = (Element) node; System.out.println("1"); //Create the a row and add two text views TableRow row2 = new TableRow(this); System.out.println("2"); TextView text3 = new TextView(this); System.out.println("3"); text3.setText("+"/*element.getElementsByTagName("pickup").item(0).getTextContent()*/); System.out.println("4"); TextView text4 = new TextView(this); text4.setText("+"/*element.getElementsByTagName("destination").item(0).getTextContent()*/); text4.setGravity(android.view.Gravity.RIGHT); System.out.println("5"); row2.addView(text3); System.out.println("6"); row2.addView(text4); System.out.println("7"); tableLayout.addView(row2, new TableLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); System.out.println("added row!"); } </code></pre> <p>Stack Trace:</p> <pre><code>02-20 17:45:35.221: I/System.out(26702): adding row... 02-20 17:45:35.221: I/System.out(26702): 1 02-20 17:45:35.231: I/System.out(26702): BidActivity.xmlToTable() - java.lang.NullPointerException 02-20 17:45:35.231: W/System.err(26702): java.lang.NullPointerException 02-20 17:45:35.231: W/System.err(26702): at android.content.ContextWrapper.getResources(ContextWrapper.java:89) 02-20 17:45:35.231: W/System.err(26702): at android.view.ContextThemeWrapper.getResources(ContextThemeWrapper.java:78) 02-20 17:45:35.231: W/System.err(26702): at android.view.View.&lt;init&gt;(View.java:3224) 02-20 17:45:35.231: W/System.err(26702): at android.view.ViewGroup.&lt;init&gt; (ViewGroup.java:420) 02-20 17:45:35.241: W/System.err(26702): at android.widget.LinearLayout.&lt;init&gt; (LinearLayout.java:168) 02-20 17:45:35.241: W/System.err(26702): at android.widget.TableRow.&lt;init&gt; (TableRow.java:61) 02-20 17:45:35.241: W/System.err(26702): at com.example.taxidata.BidActivity.xmlToTable(BidActivity.java:129) 02-20 17:45:35.241: W/System.err(26702): at com.example.taxidata.ConnectTask.parseMessage(ConnectTask.java:63) 02-20 17:45:35.241: W/System.err(26702): at com.example.taxidata.ConnectTask.onProgressUpdate(ConnectTask.java:48) 02-20 17:45:35.241: W/System.err(26702): at com.example.taxidata.ConnectTask.onProgressUpdate(ConnectTask.java:1) 02-20 17:45:35.241: W/System.err(26702): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:647) 02-20 17:45:35.241: W/System.err(26702): at android.os.Handler.dispatchMessage(Handler.java:99) 02-20 17:45:35.241: W/System.err(26702): at android.os.Looper.loop(Looper.java:137) 02-20 17:45:35.241: W/System.err(26702): at android.app.ActivityThread.main(ActivityThread.java:5039) 02-20 17:45:35.241: W/System.err(26702): at java.lang.reflect.Method.invokeNative(Native Method) 02-20 17:45:35.241: W/System.err(26702): at java.lang.reflect.Method.invoke(Method.java:511) 02-20 17:45:35.241: W/System.err(26702): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 02-20 17:45:35.241: W/System.err(26702): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 02-20 17:45:35.241: W/System.err(26702): at dalvik.system.NativeStart.main(Native Method) </code></pre>
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USuser13316
    1. USuser13316
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. COWhere is all this code located?
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      1. POAndroid Dynamically Adding Row To Table Null Exception
      1. USRaghav Sood
    2. COPost the stacktrace with the exception. I hope you aren't manually instantiating the Activity which would explain the exception.
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      1. POAndroid Dynamically Adding Row To Table Null Exception
      1. USLuksprog
    3. CORaghav: The code is inside the Activity, that displays the table. Luksprog: I am manually instantiating the Activity. I had no idea this would cause a problem. I will refactor my code so I don't need to manually instantiate it. Thanks!
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      1. POAndroid Dynamically Adding Row To Table Null Exception
      1. USuser13316
 

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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.

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