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    <p>Remember below about TableLayout.</p> <p>A layout that arranges its children horizontally. A TableRow should always be used as a child of a TableLayout. If a TableRow's parent is not a TableLayout, the TableRow will behave as an horizontal LinearLayout.</p> <p>The children of a TableRow do not need to specify the layout_width and layout_height attributes in the XML file. TableRow always enforces those values to be respectively MATCH_PARENT and WRAP_CONTENT.</p> <p>I used your layout and removed some of the attributes.It is working now. You cna do one thing, try to add the deleted attributes one by one and check the validity using the graphic layout tab.</p> <pre><code>&lt;TableLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/TableLayout" android:layout_width="fill_parent" android:layout_height="fill_parent" android:gravity="left" tools:context=".MainActivity" &gt; &lt;TableRow android:id="@+id/tableRow0" android:layout_width="wrap_content" android:layout_height="wrap_content" &gt; &lt;TextView android:id="@+id/introductionTextView" android:layout_width="wrap_content" android:layout_height="wrap_content" /&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow1" android:layout_width="wrap_content" android:layout_height="wrap_content" &gt; &lt;TextView android:id="@+id/heightPromptTextView" android:layout_width="match_parent" android:layout_height="wrap_content" /&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow2" android:layout_width="wrap_content" android:layout_height="wrap_content" &gt; &lt;EditText android:id="@+id/feetPortionOfHeightEditText" android:layout_width="fill_parent" android:layout_height="fill_parent" /&gt; &lt;TextView android:id="@+id/feetPortionOfHeightViewText" android:layout_width="wrap_content" android:layout_height="fill_parent" /&gt; &lt;EditText android:id="@+id/inchesPortionOfHeightEditText" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" android:ems="10" android:inputType="number" /&gt; &lt;TextView android:id="@+id/inchesPortionOfHeightViewText" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_weight="0" android:gravity="center_vertical" android:padding="5sp" android:paddingRight="5sp" /&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow3" android:layout_width="wrap_content" android:layout_height="wrap_content" &gt; &lt;TextView android:id="@+id/weightPromptTextView" android:layout_width="match_parent" android:layout_height="match_parent" /&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5sp" android:paddingLeft="20sp" &gt; &lt;EditText android:id="@+id/weightEditText" android:layout_width="fill_parent" android:layout_height="fill_parent" android:inputType="number" &gt; &lt;/EditText&gt; &lt;TextView android:id="@+id/weightTextView" android:layout_width="fill_parent" android:layout_height="fill_parent" /&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5sp" &gt; &lt;Button android:id="@+id/calculateButton" android:layout_width="fill_parent" android:layout_height="fill_parent" /&gt; &lt;/TableRow&gt; &lt;TableRow android:id="@+id/tableRow6" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5sp" &gt; &lt;TextView android:id="@+id/bmiResultTextView" android:layout_width="fill_parent" android:layout_height="fill_parent" /&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/bmiResultCommentsTextView" android:layout_width="fill_parent" android:layout_height="fill_parent" /&gt; &lt;/TableRow&gt; &lt;/TableLayout&gt; </code></pre>
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    1. POFATAL EXCEPTION: main & NullPointerException
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    1. This table or related slice is empty.
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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.

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