activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/box_body"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:orientation="vertical"
    tools:context="com.kongzue.baseframe.MainActivity">

    <LinearLayout
        android:id="@+id/sys_statusBar"
        android:layout_width="match_parent"
        android:layout_height="30dp"
        android:background="#303F9F"
        android:orientation="vertical"
        android:visibility="gone"></LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#3F51B5"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/txt_title"
            android:layout_width="wrap_content"
            android:layout_height="55dp"
            android:layout_centerHorizontal="true"
            android:layout_marginLeft="20dp"
            android:layout_weight="1"
            android:gravity="center_vertical"
            android:text="测试标题"
            android:textColor="#ffffff"
            android:textSize="20sp" />
    </LinearLayout>
</LinearLayout>