title: Lag for multiple images in single scrollview
body: <p>I am creating a activity for mix text and image input. 
  Here is the xml for container.</p>
  
  <pre><code>&lt;ScrollView
      android:id="@+id/new_question_body_scroll"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_below="@+id/new_question_tag_container"
      android:layout_above="@+id/oler_keyboard_accessory"
      android:layout_alignLeft="@+id/new_question_tag_container"
      android:layout_alignRight="@+id/new_question_tag_container"
      android:scrollbars="none"&gt;
  
      &lt;LinearLayout
          android:id="@+id/new_question_body_container"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:orientation="vertical"&gt;
  
          &lt;EditText
              android:id="@+id/new_question_body_text"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:background="@null"
              android:hint="Please edit your body here."
              android:layout_marginBottom="5dp"/&gt;
  
      &lt;/LinearLayout&gt;
  &lt;/ScrollView&gt;
  </code></pre>
  
  <p>After dynamically add three (not lag for two) imageViews, it become pretty lag when scrolling.
  Even if I make maxHeight and Width for each individual 50dp, the lag still exist. Am I adding imageView in the wrong way or this is the memory limit?</p>