状态栏在沉浸式模式下保持可见

android:theme="@android:style/Theme.NoTitleBar.Fullscreen"

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
}

<View
    android:id="@+id/statusBarPlaceholder"
    android:layout_width="match_parent"
    android:layout_height="@dimen/status_bar_height"
    android:background="@color/status_bar_color" />

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
    View statusBarPlaceholder = findViewById(R.id.statusBarPlaceholder);
    ViewGroup.LayoutParams layoutParams = statusBarPlaceholder.getLayoutParams();
    layoutParams.height = getStatusBarHeight();
    statusBarPlaceholder.setLayoutParams(layoutParams);
}