android - How to set LinearLayout at center of it's parent RelativeLayout -


hi new android , in login page have 2 linearlayouts second linear-layout want set @ center of it's parent relative- layout , linear layout want set top|left of it's parent relative- layout

please me one

code:-

<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/rootlayout"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="@color/yellow">      <scrollview         android:id="@+id/scrollview"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:fillviewport="false">          <relativelayout             android:layout_width="match_parent"             android:layout_height="wrap_content">              <linearlayout                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:layout_margin="10dp"                 android:gravity="top"                 android:layout_alignparentleft="true"                 android:orientation="vertical">                  <textview                     android:id="@+id/user_name_text_view_id"                     android:layout_width="wrap_content"                     android:layout_height="wrap_content"                     android:layout_gravity="left"                     android:text="@string/language_title"                     android:textappearance="?android:attr/textappearancemedium"                     android:textcolor="@color/redcolor" />                  <spinner                     android:id="@+id/spinnerlist"                     style="@style/spinner_style"                     android:layout_width="85dp"                     android:layout_height="wrap_content"                     android:layout_margintop="3dp" />              </linearlayout>              <linearlayout                 android:layout_width="match_parent"                 android:layout_height="wrap_content"                 android:layout_centerhorizontal="true"                 android:layout_centervertical="true"                 android:orientation="vertical">                  <linearlayout                     android:layout_width="match_parent"                     android:layout_height="wrap_content"                     android:layout_margintop="40dp"                     android:orientation="vertical">                      <relativelayout                         android:layout_width="match_parent"                         android:layout_height="match_parent">                          <imageview                             android:id="@+id/imageview1"                             android:layout_width="wrap_content"                             android:layout_height="wrap_content"                             android:layout_centerhorizontal="true"                             android:layout_margintop="25dp"                             android:src="@drawable/ic_serba_logo_red" />                      </relativelayout>                  </linearlayout>                  <linearlayout                     android:layout_width="match_parent"                     android:layout_height="wrap_content"                     android:layout_margintop="10dp"                     android:orientation="vertical">                      <relativelayout                         android:layout_width="match_parent"                         android:layout_height="match_parent">                          <linearlayout                             android:id="@+id/textmain"                             android:layout_width="match_parent"                             android:layout_height="wrap_content"                             android:layout_centerhorizontal="true"                             android:layout_centervertical="true"                             android:layout_margin="10dp"                             android:orientation="vertical">                              <edittext                                 android:id="@+id/edittext1"                                 android:layout_width="match_parent"                                 android:layout_height="wrap_content"                                 android:layout_margin="10dp"                                 android:background="@drawable/bordertextbox"                                 android:ems="10"                                 android:hint="@string/username_title"                                 android:inputtype="textemailaddress"                                 android:padding="8dp"                                 android:textcolor="@android:color/white"                                 android:textcolorhint="@android:color/white">                                  <requestfocus />                              </edittext>                              <edittext                                 android:id="@+id/edittext2"                                 android:layout_width="match_parent"                                 android:layout_height="wrap_content"                                 android:layout_marginbottom="10dp"                                 android:layout_marginleft="10dp"                                 android:layout_marginright="10dp"                                 android:layout_margintop="7dp"                                 android:background="@drawable/bordertextbox"                                 android:ems="10"                                 android:hint="@string/password_title"                                 android:inputtype="textpassword"                                 android:padding="8dp"                                 android:textcolor="@android:color/white"                                 android:textcolorhint="@android:color/white" />                              <linearlayout                                 android:layout_width="match_parent"                                 android:layout_height="wrap_content"                                 android:layout_margin="10dp"                                 android:weightsum="2">                                  <button                                     android:id="@+id/registerbutton"                                     android:layout_width="match_parent"                                     android:layout_height="40dp"                                     android:layout_marginright="7dp"                                     android:layout_weight="1"                                     android:background="@color/splahbgcolor"                                     android:text="@string/user_register_title"                                     android:textcolor="@android:color/white" />                                  <button                                     android:id="@+id/loginbutton"                                     android:layout_width="match_parent"                                     android:layout_height="40dp"                                     android:layout_marginleft="7dp"                                     android:layout_weight="1"                                     android:background="@color/splahbgcolor"                                     android:text="@string/user_login__title"                                     android:textcolor="@android:color/white" />                             </linearlayout>                          </linearlayout>                      </relativelayout>                  </linearlayout>              </linearlayout>          </relativelayout>      </scrollview>  </relativelayout>

you need change 2 things : 

android:fillviewport="true" //for scrollview

and relativelayout height should match_parent

android:layout_height="match_parent"

-

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