水滴屏等异形屏的状态栏处理问题

问题

水滴屏等异形屏在启动页状态栏出现黑边的问题。

theme配置项如下

  <style name="MyFullScreenTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowFullscreen">true</item>
        <item name="android:windowActionBar">false</item>
        <item name="android:windowIsTranslucent">true</item>
    </style>

方案（三种）

1、在theme中加入属性(加入之后会提示你版本问题，生成相应的style文件即可)：

        <!--   水滴屏等适配展示-->
        <item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>

2、当然也可以在代码中设置

  if (Build.VERSION.SDK_INT >= 28) {
            val lp: WindowManager.LayoutParams = this.window.attributes
            lp.layoutInDisplayCutoutMode =
                WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES
            this.window.attributes = lp
        }

3、在设置沉浸式的状态下全屏的图片会自行伸入到状态栏，自己对屏幕其他按钮等进行处理即可，沉浸式的代码如下：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Window window = activity.getWindow();
            window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
            window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setStatusBarColor(Color.TRANSPARENT);
        }

属性详解：

1、该属性有三种取值，分别为default、shortEdges、never
对应个常量值，分别为：

public static final int LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT = 0;
public static final int LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES = 1;
public static final int LAYOUT_IN_DISPLAY_CUTOUT_MODE_NEVER = 2;

对应的状态为：
1. 默认情况，全屏页面不可用刘海区域，非全屏页面可以进行使用
2. 允许页面延伸到刘海区域
3. 不允许使用刘海区域
2、详解源码

 <attr name="windowLayoutInDisplayCutoutMode">
            <!-- <p>
            The window is allowed to extend into the <code>DisplayCutout</code> area, only if
            the <code>DisplayCutout</code> is fully contained within a system bar. Otherwise, the
            window is laid out such that it does not overlap with the <code>DisplayCutout</code>
            area.
            -->
            <enum name="default" value="0" />
            <!-- <p>
            The window is always allowed to extend into the <code>DisplayCutout</code> areas on the
            short edges of the screen even if fullscreen or in landscape.
            The window will never extend into a <code>DisplayCutout</code> area on the long edges of
            the screen.
            <p>
            The window must make sure that no important content overlaps with the
            <code>DisplayCutout</code>.
            -->
            <enum name="shortEdges" value="1" />
            <!-- <p>
            The window is never allowed to overlap with the <code>DisplayCutout</code> area.
            <p>
            This should be used with windows that transiently set
            <code>SYSTEM_UI_FLAG_FULLSCREEN</code> to avoid a relayout of the window when the
            flag is set or cleared.
            -->
            <enum name="never" value="2" />
        </attr>

  /**
         * Controls how the window is laid out if there is a {@link DisplayCutout}.
         *
         * <p>
         * Defaults to {@link #LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT}.
         *
         * @see #LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT
         * @see #LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES
         * @see #LAYOUT_IN_DISPLAY_CUTOUT_MODE_NEVER
         * @see #LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS
         * @see DisplayCutout
         * @see android.R.attr#windowLayoutInDisplayCutoutMode
         *         android:windowLayoutInDisplayCutoutMode
         */
        @LayoutInDisplayCutoutMode
        public int layoutInDisplayCutoutMode = LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT;

        /**
         * The window is allowed to extend into the {@link DisplayCutout} area, only if the
         * {@link DisplayCutout} is fully contained within a system bar. Otherwise, the window is
         * laid out such that it does not overlap with the {@link DisplayCutout} area.
         *
         * <p>
         * In practice, this means that if the window did not set {@link #FLAG_FULLSCREEN} or
         * {@link View#SYSTEM_UI_FLAG_FULLSCREEN}, it can extend into the cutout area in portrait
         * if the cutout is at the top edge. Similarly for
         * {@link View#SYSTEM_UI_FLAG_HIDE_NAVIGATION} and a cutout at the bottom of the screen.
         * Otherwise (i.e. fullscreen or landscape) it is laid out such that it does not overlap the
         * cutout area.
         *
         * <p>
         * The usual precautions for not overlapping with the status and navigation bar are
         * sufficient for ensuring that no important content overlaps with the DisplayCutout.
         *
         * @see DisplayCutout
         * @see WindowInsets
         * @see #layoutInDisplayCutoutMode
         * @see android.R.attr#windowLayoutInDisplayCutoutMode
         *         android:windowLayoutInDisplayCutoutMode
         */
        public static final int LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT = 0;

        /**
         * The window is always allowed to extend into the {@link DisplayCutout} areas on the short
         * edges of the screen.
         *
         * The window will never extend into a {@link DisplayCutout} area on the long edges of the
         * screen.
         *
         * <p>
         * The window must make sure that no important content overlaps with the
         * {@link DisplayCutout}.
         *
         * <p>
         * In this mode, the window extends under cutouts on the short edge of the display in both
         * portrait and landscape, regardless of whether the window is hiding the system bars:<br/>
         * <img src="{@docRoot}reference/android/images/display_cutout/short_edge/fullscreen_top_no_letterbox.png"
         * height="720"
         * alt="Screenshot of a fullscreen activity on a display with a cutout at the top edge in
         *         portrait, no letterbox is applied."/>
         *
         * <img src="{@docRoot}reference/android/images/display_cutout/short_edge/landscape_top_no_letterbox.png"
         * width="720"
         * alt="Screenshot of an activity on a display with a cutout at the top edge in landscape,
         *         no letterbox is applied."/>
         *
         * <p>
         * A cutout in the corner is considered to be on the short edge: <br/>
         * <img src="{@docRoot}reference/android/images/display_cutout/short_edge/fullscreen_corner_no_letterbox.png"
         * height="720"
         * alt="Screenshot of a fullscreen activity on a display with a cutout in the corner in
         *         portrait, no letterbox is applied."/>
         *
         * <p>
         * On the other hand, should the cutout be on the long edge of the display, a letterbox will
         * be applied such that the window does not extend into the cutout on either long edge:
         * <br/>
         * <img src="{@docRoot}reference/android/images/display_cutout/short_edge/portrait_side_letterbox.png"
         * height="720"
         * alt="Screenshot of an activity on a display with a cutout on the long edge in portrait,
         *         letterbox is applied."/>
         *
         * @see DisplayCutout
         * @see WindowInsets#getDisplayCutout()
         * @see #layoutInDisplayCutoutMode
         * @see android.R.attr#windowLayoutInDisplayCutoutMode
         *         android:windowLayoutInDisplayCutoutMode
         */
        public static final int LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES = 1;

        /**
         * The window is never allowed to overlap with the DisplayCutout area.
         *
         * <p>
         * This should be used with windows that transiently set
         * {@link View#SYSTEM_UI_FLAG_FULLSCREEN} or {@link View#SYSTEM_UI_FLAG_HIDE_NAVIGATION}
         * to avoid a relayout of the window when the respective flag is set or cleared.
         *
         * @see DisplayCutout
         * @see #layoutInDisplayCutoutMode
         * @see android.R.attr#windowLayoutInDisplayCutoutMode
         *         android:windowLayoutInDisplayCutoutMode
         */
        public static final int LAYOUT_IN_DISPLAY_CUTOUT_MODE_NEVER = 2;

总结

两种方案都可以解决，具体自行选择即可。