<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="#6699ff"

    android:clipToPadding="true"

    android:fitsSystemWindows="true"

    android:orientation="vertical" >

    <RelativeLayout

        android:layout_width="fill_parent"

        android:layout_height="50dp"

        android:orientation="vertical" >

        <TextView

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_centerInParent="true"

            android:text="标题"

            android:textColor="#ffffff"

            android:textSize="20sp" />

    </RelativeLayout>

    <LinearLayout

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:background="#ffffff"

        android:gravity="center"

        android:orientation="vertical" >

        <TextView

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="Hello World"

            android:textColor="#000000"

            android:textSize="28sp"

            android:textStyle="italic" />

    </LinearLayout>

</LinearLayout>

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        //判断当前SDK版本号，如果是4.4以上，就是支持沉浸式状态栏的

        if (VERSION.SDK_INT >= VERSION_CODES.KITKAT) {

            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);

            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);

        }

    }