android - How to Align ImageButton left side and TextView Center using LinerLayout? -

<?xml version="1.0" encoding="utf-8"?>    <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"     tools:context="com.example.ravi.designdemo.main4activity">        <linearlayout         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:background="@drawable/navigationbar"         android:id="@id/ll1">          <imagebutton             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:id="@+id/imb1"             android:background="@drawable/back" />          <textview             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:id="@+id/tv1"             android:text="sign in"             android:textcolor="#ffffff"             android:gravity="center_vertical"             android:textsize="25dp"             android:textstyle="bold"/>      </linearlayout>  </relativelayout> 

this layout. have imageview on left side , textview on center inside linearlayout. using linearlayout inside relativelayout.

android:layout_gravity="center_vertical" add textview.