配置

1. 在res/value/styles中配置状态栏的背景颜色

    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Actionbar color -->
        <item name="colorPrimary">@color/transparent</item>
        <!--Status bar color-->
        <item name="colorPrimaryDark">@color/transparent</item>
    </style>

2. 在manifest中定义使用AppTheme

 <application
      android:name=".MainApplication"
      android:theme="@style/AppTheme">

3. 在MainActivity的onCreate方法中使得页面全屏显示

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            Window window = getWindow();
            window.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION, WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
            window.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        }
    }