Databases
StackOverflow2013
Postsdbo
PONull Pointer Exception in an Android Table Layout
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PONull Pointer Exception in an Android Table Layout
    primarykey
    data
    text
    <p>I created an xml file using Eclipse for an Android app that I was creating. After finishing all the layouts, and doing some coding and such, I found out that the final product needed to be on an earlier API level (10 to be exact). So I began the process of rolling back the code and the xml files, but have run into a problem that I can't solve, and doesn't seem to have any documentation. I created a table layout, and have many table rows. When I try to run the program on the virtual device, I'm given a Null Pointer Exception with regards to the TableRow.measureNullChild(int) function, the code of which is: </p> <pre><code>@Override int measureNullChild(int childIndex) { return mConstrainedColumnWidths[childIndex]; } </code></pre> <p>Obviously the problem is in there somewhere, but I'm not sure of the exact specifics, and was wondering if anybody else has had this problem. I'll now post the xml file that causes the crash:</p> <pre><code>&lt;TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/livelayout" android:layout_width="fill_parent" android:layout_height="fill_parent"&gt; &lt;TableRow android:id="@+id/tableRow8" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingTop="5dp" &gt; &lt;RelativeLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/hope" &gt; &lt;/RelativeLayout&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow7" android:layout_width="wrap_content" android:layout_height="wrap_content" &gt; &lt;TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="30dp" android:layout_gravity="center_vertical" android:layout_margin="0dp" android:gravity="center" android:paddingLeft="0dp" android:paddingTop="0dp" android:text="@string/us" android:textSize="28dp" android:textColor="#CC7F32" /&gt; &lt;FrameLayout android:layout_width="wrap_content" android:layout_height="wrap_content" &gt; &lt;TextView android:id="@+id/TextView01" android:layout_width="70dp" android:layout_height="30dp" android:layout_margin="0dp" android:gravity="center" android:paddingLeft="0dp" android:paddingTop="0dp" android:text="@string/them" android:textSize="26dp" android:textColor="#CC7F32" /&gt; &lt;/FrameLayout&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow2" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_vertical" android:visibility="visible" &gt; &lt;Button android:id="@+id/us2" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/us2" /&gt; &lt;Button android:id="@+id/us2made" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/us2m" /&gt; &lt;Button android:id="@+id/button3" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/them2" /&gt; &lt;Button android:id="@+id/button4" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/them2m" /&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_vertical" &gt; &lt;Button android:id="@+id/button5" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/us1" /&gt; &lt;Button android:id="@+id/button6" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/us1m" /&gt; &lt;Button android:id="@+id/button7" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/them1" /&gt; &lt;Button android:id="@+id/button8" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/them1m" /&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_vertical" &gt; &lt;Button android:id="@+id/button9" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/us3" /&gt; &lt;Button android:id="@+id/button10" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/us3m" /&gt; &lt;Button android:id="@+id/button11" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/them3" /&gt; &lt;Button android:id="@+id/button12" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/them3m" /&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_vertical" &gt; &lt;Button android:id="@+id/button13" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/usOreb" /&gt; &lt;Button android:id="@+id/button14" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/usXreb" /&gt; &lt;Button android:id="@+id/button15" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/themOreb" /&gt; &lt;Button android:id="@+id/button16" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/themXreb" /&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center_vertical" &gt; &lt;Button android:id="@+id/button17" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/us2f" /&gt; &lt;Button android:id="@+id/button18" android:layout_width="70dp" android:layout_height="50dp" android:text="@string/us2fm" /&gt; &lt;Button android:id="@+id/button19" android:layout_width="70dp" android:layout_height="50dp" android:padding="5dp" android:text="@string/them2f" /&gt; &lt;Button android:id="@+id/button20" android:layout_width="70dp" android:layout_height="50dp" android:padding="5dp" android:text="@string/them2fm" /&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow6" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingTop="30dp" &gt; &lt;/TableRow&gt; &lt;FrameLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingLeft="60dp" android:paddingRight="60dp" &gt; &lt;Button android:id="@+id/button21" android:layout_width="201dp" android:layout_height="match_parent" android:text="Button" /&gt; &lt;/FrameLayout&gt; &lt;FrameLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingLeft="60dp" android:paddingRight="60dp" android:paddingTop = "15dp" &gt; &lt;Button android:id="@+id/Button01" android:layout_width="201dp" android:layout_height="match_parent" android:text="Button" /&gt; &lt;/FrameLayout&gt; &lt;/TableLayout&gt; </code></pre> <p>Any help would be absolutely fantastic, as I've been stuck here for like two days, and haven't been able to figure out what's wrong. I'll be sure to post here if I do though so that googlers can find the answer if this happens to them. Thanks in advance</p> <p>EDIT: After removing all rows but one, that contains content, I get the same error in the same spot</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USJamie E
    1. USJamie E
    plurals
    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. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COAnd `mConstrainedColumnWidths` is ...? And initialized when/how?
      singulars
      1. PONull Pointer Exception in an Android Table Layout
      1. USK-ballo
    2. COIf the exception is in the code you posted, then the only explanation is that `mConstrainedColumnWidths` is `null` when the method is called.
      singulars
      1. PONull Pointer Exception in an Android Table Layout
      1. USTed Hopp
    3. COThe only way I see that happening is if `layout` is called before `measure`. Are you calling `layout` (or `onLayout`) for the table or any of its rows explicitly?
      singulars
      1. PONull Pointer Exception in an Android Table Layout
      1. USTed Hopp
 

Querying!

 
Guidance
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.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload