title: Layout params of loaded view are ignored
body: <p>I'm trying to write my own custom <code>View</code> and I have problem with <code>LayoutParams</code>. </p>
  
  <p>The idea is to extend <code>ViewGroup</code> (<code>LinearLayout</code>)</p>
  
  <pre><code>public class MyView extends LinearLayout{
      public MyView(Context context, AttributeSet attrs) {
          super(context, attrs);
      }
      public MyView(Context context) {
          super(context);
      }
      public void putContent(){
          setOrientation(HORIZONTAL);
          LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
          for (int i = 0; i &lt; 5; i++){
              View view = inflater.inflate(R.layout.item, null);
              TextView tv = (TextView)view.findViewById(R.id.item_text);
              tv.setText("Item " + i);
              addView(view);
          }
      }
  }
  </code></pre>
  
  <p>As you can see <code>putContent</code> method inflates an items and adds to my view. Here is an item layout</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FFFFFF"&gt;
      &lt;TextView android:text="TextView"
      android:id="@+id/item_text"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:textColor="#000000"/&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>And main screen layout</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent" android:orientation="vertical"&gt;
  &lt;TextView  
      android:layout_width="match_parent" 
      android:layout_height="wrap_content"
      android_layout_weight="1" 
      android:text="@string/hello"
      /&gt;
      &lt;my.test.MyView
      android:id="@+id/my_view"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android_layout_weight="1"
      /&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>And activity code</p>
  
  <pre><code>public class Start extends Activity {
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.main);
          MyView myView = (MyView)findViewById(R.id.my_view);
          myView.putContent();
      }
  }
  </code></pre>
  
  <p>Here is screenshot of what i get </p>
  
  <p><img src="https://i.stack.imgur.com/EG5Of.png" alt="enter image description here"></p>
  
  <p>So problem is: attributes of item's root element is ignored</p>
  
  <pre><code>android:layout_width="match_parent"
  android:layout_height="match_parent"
  </code></pre>
  
  <p>But in result I want to get something like this (I get this result when replace <code>addView(view);</code> with this line)</p>
  
  <pre><code>addView(view, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1F));
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/3QCQj.png" alt="enter image description here"></p>
  
  <p>So question is: how I can achieve this result without hard coded LayoutParams ?
  Thanks for any help!</p>
  
  <p><strong>update</strong></p>
  
  <p>I also look at the <code>view</code> variable fields in debug mode - the <code>mLayoutParams</code> is <code>null</code>, and became not null when I add inflated <code>view</code> into parent with <code>addView(view, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1F));</code>.
  <img src="https://i.stack.imgur.com/vY4nU.png" alt="enter image description here"> </p>
  
  <p>But <code>mLayoutParams</code> of child of just-loaded view is not null.
  Why LayoutParams of only root element in xml layout are ignored when view inflated?</p>