title: How to get fragment width?
body: <p>Here is my layout.I need to get the width in CategoryFragment.</p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="horizontal" &gt;
  
      &lt;LinearLayout
          android:id="@+id/category_list"
          android:layout_width="150dp"
          android:layout_height="match_parent"
          android:background="@color/white_background"
          android:orientation="vertical" &gt;
  
          &lt;TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:gravity="center"
              android:padding="10dp"
              android:text="@string/pianodule_list"
              android:textSize="16sp" /&gt;
  
          &lt;com.handmark.pulltorefresh.library.PullToRefreshListView
              android:id="@id/refreshable_listview"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:choiceMode="singleChoice"
              android:descendantFocusability="beforeDescendants"
              android:divider="@null" /&gt;
      &lt;/LinearLayout&gt;
  
      &lt;View
          android:layout_width="0.1dp"
          android:layout_height="match_parent"
          android:background="@color/divider_line" /&gt;
  
      &lt;fragment
          android:name="com.srefu.frag.CategoryFragment"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:tag="category" /&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>so in  onViewCreated() of CategoryFragment I try several way to achieve it but all not work.</p>
  
  <pre><code>@Override
  public void onViewCreated(View view, Bundle savedInstanceState) {
      super.onViewCreated(view, savedInstanceState);
      View v = view;
      // View v = getView(); 
      int w1 = v.getWidth(); //return 0
      int w2 = v.getLayoutParams().width; //return NullPointerException
      int w3 = v.getMeasuredWidth(); //return 0
  }
  </code></pre>
  
  <p>how should i do can i get width of fragment?Any help will  is appreciated .Thanks. :)</p>