在Android菜单图标中的开关按钮下方/上方添加文本 [英] Adding text below/above a switch button in Android menu icon

问题描述

我正在尝试在 Toolbar 中此 switch 项下方/上方添加文本，以指示该开关的功能.我想知道是否可以使用布局标签在按钮下方/上方添加文本.还是我必须使用其他方法.

menu_main.xml

 <菜单xmlns:android ="http://schemas.android.com/apk/res/android"xmlns:app =" http://schemas.android.com/apk/res-autoxmlns:tools ="http://schemas.android.com/tools"工具:context ＝.MainActivity".<项目android:id ="@@ id/edit";android:title =" @ string/app_name"app:actionViewClass =" android.widget.Switch"android:icon ="@ drawable/ic_edit"app:showAsAction =始终"android:visible ="true"/> 

当前看起来像这样:

解决方案

您可以创建一个自定义菜单布局，其中包含其描述的 Switch 和 TextView

layout/menu_layout.xml

 <?xml version ="1.0"encoding ="utf-8"?< LinearLayout xmlns:android =" http://schemas.android.com/apk/res/android"android:id ="@@ id/menuRoot"android:layout_width =" match_parent"android:layout_height =" match_parent"android:paddingTop =" 8dp"android:gravity ="center"android:orientation =" vertical">< androidx.appcompat.widget.SwitchCompatandroid:id =" @ + id/menu_switch"android:layout_width =" wrap_content"android:layout_height =" wrap_content"/>< TextViewandroid:id =" @ + id/switch_text"android:layout_width =" wrap_content"android:layout_height =" wrap_content"android:text =" OFF"android:textColor =" @ color/white"android:textSize =" 12sp"/></LinearLayout> 

然后利用菜单项的 app:actionLayout 属性附加自定义菜单

menu/my_menu.xml

 <?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><项目android:id ="@@ id/switchItem"android:title ="switch"app:actionLayout =" @ layout/menu_layout;app:showAsAction =始终"/></菜单> 

您可以检测到开关单击回调并相应地更改说明，如下所示:

  @Overridepublic boolean onCreateOptionsMenu(Menu menu){getMenuInflater().inflate(R.menu.my_menu，menu);MenuItem item = menu.findItem(R.id.switchItem);LinearLayout根= item.getActionView().findViewById(R.id.menuRoot);SwitchCompat菜单Switch = root.findViewById(R.id.menu_switch);TextView switchText = root.findViewById(R.id.switch_text);menuSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){@Overridepublic void onCheckedChanged(CompoundButton buttonView，boolean isChecked){switchText.setText(isChecked?"ON":"OFF");}});返回true；} 

预览

I am trying to add a text below/above this switch item that is in my Toolbar to indicate functionality of the switch. I was wondering if there is a layout tag I could use to add a text below/above the button. Or is there some other method I have to use.

menu_main.xml

<menu
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".MainActivity">

    <item
        android:id="@+id/edit"
        android:title="@string/app_name"
        app:actionViewClass="android.widget.Switch"
        android:icon="@drawable/ic_edit"
        app:showAsAction="always" android:visible="true"/>

Currently it looks like this:

解决方案

You can create a custom menu layout that has a Switch and a TextView of its description

layout/menu_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/menuRoot"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingTop="8dp"
    android:gravity="center"
    android:orientation="vertical">

    <androidx.appcompat.widget.SwitchCompat
        android:id="@+id/menu_switch"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/switch_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="OFF"
        android:textColor="@color/white"
        android:textSize="12sp" />

</LinearLayout>

Then utilize the app:actionLayout attribute of the menu item to attach the custom menu

menu/my_menu.xml

<?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:id="@+id/switchItem"
        android:title="switch"
        app:actionLayout="@layout/menu_layout"
        app:showAsAction="always" />

</menu>

And you can detect the switch click callbacks and change the description accordingly as below:

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.my_menu, menu);

        MenuItem item = menu.findItem(R.id.switchItem);
        LinearLayout root = item.getActionView().findViewById(R.id.menuRoot);
        SwitchCompat menuSwitch = root.findViewById(R.id.menu_switch);
        TextView switchText = root.findViewById(R.id.switch_text);
        menuSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                switchText.setText(isChecked? "ON" : "OFF");
            }
        });
        return true;
    }

A preview

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