title: Scroll View Is not working in my Android Device
body: <p>This is XML code of my android app. The problem is my screen is not scrolling down. For testing the scroll view I have given  <code>android:layout_marginTop="1500dp"</code> in order to see whether scrollView is working or but it is not working.</p>
  
  <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#A6A69C"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context="com.example.test.MainActivity" &gt;
  
  &lt;ScrollView
      android:layout_width="match_parent"
      android:layout_height="wrap_content" &gt;
  
      &lt;LinearLayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:orientation="vertical"
          android:layout_marginTop="1500dp"
          android:gravity="center_horizontal|center_vertical" &gt;
  
          &lt;LinearLayout
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:orientation="horizontal"
              android:gravity="center_horizontal|center_vertical"
              android:layout_gravity="center_horizontal|center_vertical"
              android:background="#95D990" &gt;
  
              &lt;Button
                  android:id="@+id/btn_date"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:text="SELECT DATE" /&gt;
  
              &lt;EditText
                  android:id="@+id/in_date"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content" /&gt;
          &lt;/LinearLayout&gt;
  
          &lt;LinearLayout
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:orientation="horizontal"
              android:layout_marginTop="35dp"
              android:gravity="center_horizontal|center_vertical"
              android:layout_gravity="center_horizontal|center_vertical"
              android:background="#EAF980"&gt;
  
              &lt;Button
                  android:id="@+id/btn_time"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:text="SELECT TIME" /&gt;
  
              &lt;EditText
                  android:id="@+id/in_time"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content" /&gt;
          &lt;/LinearLayout&gt;
      &lt;/LinearLayout&gt;
  &lt;/ScrollView&gt;
  </code></pre>
  
  <p></p>