如何在android的菜单项中添加切换按钮 [英] How to add toggle button in menu item in android

问题描述

I have options menu item in my application. Requirement was to add a toggle button to a menu item. Is this possible?

解决方案

As of this writing there are 3 options.

1) Use app:actionViewClass. Example:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:title="Switch!"
        app:actionViewClass="android.widget.Switch"
        app:showAsAction="always" />
</menu>

2) You can use a custom layout in a menu item to add toggle button. Example:

Create a layout with Switch (alternatively, you may also use ToggleButton), res/layout/menu_switch.xml:

<?xml version="1.0" encoding="utf-8"?>
<Switch xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:padding="64dp" />

And use that layout in menu item:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:title="@string/switch_button_title"
        app:actionLayout="@layout/menu_switch"
        app:showAsAction="always" />
</menu>

3) You need to set android:checkable property of the menu to true and control its checked state in runtime. Example:

Menu:

<item
    android:id="@+id/checkable_menu"
    android:checkable="true"
    android:title="@string/checkable" />

Activity:

private boolean isChecked = false;

@Override
public boolean onPrepareOptionsMenu(Menu menu) {
    MenuItem checkable = menu.findItem(R.id.checkable_menu);
    checkable.setChecked(isChecked);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.checkable_menu:
            isChecked = !item.isChecked();
            item.setChecked(isChecked);
            return true;
        default:
            return false;
    }
}

Hope this helps.

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