xml - Android text alignment changed automatically -

trying create layout working yesterday today opened xml view text of controls right aligned happen every screen.

<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="@drawable/bg"       >      <relativelayout         android:id="@+id/layout_logo"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:layout_above="@+id/layout_loginarea"         android:gravity="center_horizontal" >          <imageview             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:src="@drawable/logo" />     </relativelayout>      <linearlayout         android:id="@+id/layout_loginarea"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:layout_centerinparent="true"         android:gravity="center"         android:orientation="vertical"         android:padding="10dp" >          <edittext             android:id="@+id/edit_username"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:background="@drawable/txt_box"             android:hint="@string/usernamehint"             android:inputtype="textpersonname"             android:paddingbottom="4dp"             android:paddingleft="6dp"             android:paddingright="6dp"             android:paddingtop="4dp"             android:textcolor="#ffffff"             android:textcolorhint="#ffffff" />          <edittext             android:id="@+id/edit_password"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_margintop="3dp"             android:background="@drawable/txt_box"             android:hint="@string/passwordhint"             android:inputtype="textpassword"             android:padding="4dp"             android:paddingbottom="4dp"             android:paddingleft="6dp"             android:paddingright="6dp"             android:paddingtop="4dp"             android:textcolor="#ffffff"             android:textcolorhint="#ffffff" />          <button             android:id="@+id/button_login"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_gravity="center"             android:layout_margintop="3dp"             android:background="@drawable/signin_button"             android:text="@string/loginbuttontext" />          <textview             android:id="@+id/txt_forgotpassword"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_margintop="10dp"             android:gravity="center_horizontal"             android:text="@string/forgotpassword" />     </linearlayout>      <linearlayout         android:id="@+id/layout_createaccount"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:layout_alignparentbottom="true"         android:gravity="center"         android:orientation="vertical"         android:padding="10dp" >          <button             android:id="@+id/button_facebook"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_gravity="center"             android:background="@drawable/facebook_button"             android:text="@string/createaccount" />          <button             android:id="@+id/button_createaccount"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:background="@drawable/create_account" />     </linearlayout>  </relativelayout> 

set width of view , make view gravity="center"

<linearlayout         android:id="@+id/layout_createaccount"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:layout_alignparentbottom="true"         android:orientation="vertical"         android:padding="10dp" >          <button             android:id="@+id/button_facebook"             android:layout_width="200dp"             android:layout_height="wrap_content"             android:layout_gravity="center"             android:background="@color/app_bg"             android:gravity="center"             android:text="createaccount" />          <button             android:id="@+id/button_createaccount"             android:layout_width="200dp"             android:layout_height="wrap_content"             android:layout_margintop="2dp"             android:background="@color/app_bg"             android:gravity="center"             android:text="createaccount" /> </linearlayout>