Question

我正在尝试以全屏（沉浸式模式）打开下拉式微调器，但问题是当下拉式打开时它会在底部显示半透明导航栏。选择选项时，导航栏会隐藏，但只要下拉列表可见，导航栏就会保持可见状态。我能够在对话框片段中删除此行为，因为我有show(FragmentManager manager, String tag)方法来覆盖并添加此

getDialog().getWindow().getDecorView().setSystemUiVisibility(getActivity()
.getWindow().getDecorView().getSystemUiVisibility());

// Make the dialogs window focusable
 again.getDialog().getWindow().clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);

但没有类似于旋转器中可用的方法。我尝试将这些方法放在performClick()中使用父级中的侦听器实现，但仍然没有运气。

此问题的任何解决方案。

Answer 1

试试这段代码：

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

Answer 2

为Java用户创建此静态类

import android.widget.ListPopupWindow;
import android.widget.PopupWindow;
import android.widget.Spinner;

public static void avoidSpinnerDropdownFocus(Spinner spinner) {
    try {
        Field listPopupField = Spinner.class.getDeclaredField("mPopup");
        listPopupField.setAccessible(true);
        Object listPopup = listPopupField.get(spinner);
        if (listPopup instanceof ListPopupWindow) {
            Field popupField = ListPopupWindow.class.getDeclaredField("mPopup");
            popupField.setAccessible(true);
            Object popup = popupField.get((ListPopupWindow) listPopup);
            if (popup instanceof PopupWindow) {
                ((PopupWindow) popup).setFocusable(false);
            }
        }
    } catch (NoSuchFieldException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }
}

供Kotlin用户使用此扩展功能

import android.widget.ListPopupWindow
import android.widget.PopupWindow
import android.widget.Spinner

fun Spinner.avoidDropdownFocus() {
try {
    val listPopup = Spinner::class.java
            .getDeclaredField("mPopup")
            .apply { isAccessible = true }
            .get(this)
    if (listPopup is ListPopupWindow) {
        val popup = ListPopupWindow::class.java
                .getDeclaredField("mPopup")
                .apply { isAccessible = true }
                .get(listPopup)
        if (popup is PopupWindow) {
            popup.isFocusable = false
        }
    }
} catch (e: Exception) {
    e.printStackTrace()
}
}

您需要在spinner方法中或在OnCreate膨胀时或使用之前的任何时间从Spinner调用该方法。

spinner.avoidSpinnerDropdownFocus()

kakajika GitHub用户kakajika的积分 https://gist.github.com/kakajika/a236ba721a5c0ad3c1446e16a7423a63

Android：全屏旋转下拉菜单

2 个答案: