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    <p><a href="http://developer.android.com/reference/android/view/View.html" rel="nofollow noreferrer">IDs and Tags</a></p> <p><strong>IDs</strong></p> <blockquote> <p>Views may have an integer id associated with them. These ids are typically assigned in the layout XML files, and are used to find specific views within the view tree. A common pattern is to:</p> <p>Define a Button in the layout file and assign it a unique ID.</p> <pre><code>&lt;Button android:id="@+id/my_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/my_button_text"/&gt; </code></pre> <p>From the onCreate method of an Activity, find the Button</p> <pre><code>Button myButton = (Button) findViewById(R.id.my_button); </code></pre> <p>View IDs need not be unique throughout the tree, but it is good practice to ensure that they are at least unique within the part of the tree you are searching.</p> </blockquote> <p><strong>Tags</strong></p> <blockquote> <p>Unlike IDs, tags are not used to identify views. Tags are essentially an extra piece of information that can be associated with a view. They are most often used as a convenience to store data related to views in the views themselves rather than by putting them in a separate structure.</p> <p>Tags may be specified with character sequence values in layout XML as either a single tag using the android:tag attribute or multiple tags using the child element:</p> <pre><code> &lt;View ... android:tag="@string/mytag_value" /&gt; &lt;View ...&gt; &lt;tag android:id="@+id/mytag" android:value="@string/mytag_value" /&gt; &lt;/View&gt; </code></pre> <p>Tags may also be specified with arbitrary objects from code using <code>setTag(Object)</code> or <code>setTag(int, Object)</code>.</p> </blockquote>
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    1. POWhat are "tag" and "id" on Layouts?
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    1. USGowtham Gopalakrishnan
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    1. COThanks for the that link. It explained most of my doubts.
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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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