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copied!<p>I've investigated this issue, referring to the <a href="http://developer.android.com/reference/android/view/LayoutInflater.html">LayoutInflater docs</a> and setting up a small sample demonstration project. The following tutorials shows how to dynamically populate a layout using <code>LayoutInflater</code>.</p> <p>Before we get started see what <code>LayoutInflater.inflate()</code> parameters look like:</p> <ul> <li><strong>resource</strong>: ID for an XML layout resource to load (e.g., <code>R.layout.main_page</code>)</li> <li><strong>root</strong>: Optional view to be the parent of the generated hierarchy (if <code>attachToRoot</code> is <code>true</code>), or else simply an object that provides a set of <code>LayoutParams</code> values for root of the returned hierarchy (if <code>attachToRoot</code> is <code>false</code>.)</li> <li><p><strong>attachToRoot</strong>: Whether the inflated hierarchy should be attached to the root parameter? If false, root is only used to create the correct subclass of <code>LayoutParams</code> for the root view in the XML.</p></li> <li><p><strong>Returns</strong>: The root View of the inflated hierarchy. If root was supplied and <code>attachToRoot</code> is <code>true</code>, this is root; otherwise it is the root of the inflated XML file. </p></li> </ul> <p>Now for the sample layout and code.</p> <p>Main layout (<code>main.xml</code>):</p> <pre><code><?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/container" android:layout_width="match_parent" android:layout_height="match_parent"> </LinearLayout> </code></pre> <p>Added into this container is a separate TextView, visible as small red square if layout parameters are successfully applied from XML (<code>red.xml</code>):</p> <pre><code><?xml version="1.0" encoding="utf-8"?> <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="25dp" android:layout_height="25dp" android:background="#ff0000" android:text="red" /> </code></pre> <p>Now <code>LayoutInflater</code> is used with several variations of call parameters</p> <pre><code>public class InflaterTest extends Activity { private View view; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ViewGroup parent = (ViewGroup) findViewById(R.id.container); // result: layout_height=wrap_content layout_width=match_parent view = LayoutInflater.from(this).inflate(R.layout.red, null); parent.addView(view); // result: layout_height=100 layout_width=100 view = LayoutInflater.from(this).inflate(R.layout.red, null); parent.addView(view, 100, 100); // result: layout_height=25dp layout_width=25dp // view=textView due to attachRoot=false view = LayoutInflater.from(this).inflate(R.layout.red, parent, false); parent.addView(view); // result: layout_height=25dp layout_width=25dp // parent.addView not necessary as this is already done by attachRoot=true // view=root due to parent supplied as hierarchy root and attachRoot=true view = LayoutInflater.from(this).inflate(R.layout.red, parent, true); } } </code></pre> <p>The actual results of the parameter variations are documented in the code.</p> <p><strong>SYNOPSIS:</strong> Calling <code>LayoutInflater</code> without specifying root leads to inflate call ignoring the layout parameters from the XML. Calling inflate with root not equal <code>null</code> and <code>attachRoot=true</code> does load the layout parameters, but returns the root object again, which prevents further layout changes to the loaded object (unless you can find it using <code>findViewById()</code>). The calling convention you most likely would like to use is therefore this one:</p> <pre><code>loadedView = LayoutInflater.from(context) .inflate(R.layout.layout_to_load, parent, false); </code></pre> <p>To help with layout issues, the <a href="https://developer.android.com/studio/profile/hierarchy-viewer.html">hierarchy viewer</a> is highly recommended.</p>

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