如何在Android上的子菜单中选择多个复选框？

老实说,我不知道你所追求的是否可行(编辑：你正在实施它的方式,作为一个子菜单),但我会这样做：

创建一个看起来像要显示的子菜单的活动.

它可能看起来有点复杂,但它是直接的,并且以这种方式,如果您选择/取消选择项目,它将不会消失,并且您可以实现更多功能.

以下是我亲自完成的工作：

>创建一个表示子菜单项的类.它应该包含一个字符串(描述)和一个布尔值(如果选中或不存储则存储).

public class SettingCheckBox implements Serializable {

    private static final long serialVersionUID = 1L;

    private static final String DEFAULT_DESCRIPTION = "N/A";

    private final String description;

    private boolean checked;

    public String getDescription () {
        return description == null ? DEFAULT_DESCRIPTION  : description;
    }

    public void setChecked ( final boolean checked ) {
        this.checked = checked;
    }

    public boolean getChecked () {
        return checked;
    }

    public SettingCheckBox ( final String description ) {
        this.description = description;
    }

}

如您所见,该类实现了Serializable,以便可以使用Intents / bundles将该类的对象从一个活动传递到另一个.

>将以下内容添加到当前活动中(我假设它名为MainActivity,因此在您尝试时,请使用您的活动名称替换MainActivity).

public static final String SETTING_CHECK_Box = "SETTING_CHECK_Box";

private ArrayList < SettingCheckBox > settingList;

@Override
public void onCreate(Bundle savedInstanceState) {
    // ... 
    settingList = new ArrayList < SettingCheckBox > ();
    settingList.add ( new SettingCheckBox ( "Option A" ) );
    settingList.add ( new SettingCheckBox ( "Option B" ) );
    // ... add more items
    // restore any prevIoUsly saved list
    if ( savedInstanceState != null ) {
        settingList = (ArrayList < SettingCheckBox >) savedInstanceState.getSerializable ( SETTING_CHECK_Box );
    }
    // ...
}

protected void onSaveInstanceState ( Bundle outState ) {
    super.onSaveInstanceState ( outState );
    outState.putSerializable ( SETTING_CHECK_Box,settingList );
}

列表(ArrayList)用于通过复选框托管所有设置子菜单项.
如您所见,每个SettingCheckBox对象都有描述和状态(已选中或未选中).默认情况下,一旦创建,则取消选中对象状态.
您应该初始化onCreate方法中的列表.

静态和最终变量SETTING_CHECK_Box用作在活动重新创建之前/之后(如屏幕旋转)保存/恢复该列表内容的键,还用于将设置列表从活动传递到另一个活动. (稍后解释)

>删除子菜单,以使菜单xml文件如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/select_options" 
        android:title="Add/Remove">
    </item>
</menu>

不再需要子菜单,因为您将实现一个类似于一个的活动.
现在,要将菜单项链接到将显示设置的活动,您应该在当前活动中使用onoptionsItemSelected方法,如下所示：

@Override
public boolean onoptionsItemSelected ( MenuItem menuItem ) {
    if ( menuItem.getItemId () == R.id.select_options ) {
        Intent intent = new Intent ( this,MyActivity_Settings.class );
        intent.putExtra ( SETTING_CHECK_Box,settingList );
        startActivityForResult ( intent,0 );
    }
}

将为结果启动设置活动.这意味着它表现为子活动,并且可以将结果返回到其父活动.

设置列表通过intent传递给设置活动.

如果子活动结束并将数据返回到父活动,则调用以下方法：

protected void onActivityResult ( int requestCode,int resultCode,Intent data ) {
    if ( resultCode != RESULT_OK || data == null )
        return;
    settingList = (ArrayList < SettingCheckBox >) data.getSerializableExtra ( SETTING_CHECK_Box );
}

您应该让子/设置活动返回(新的/修改的)设置列表,如上所示,设置新列表.

>创建以下名为sub_menu的布局xml文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ListView
        android:id="@android:id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </ListView>

</LinearLayout>

这是将充当子菜单的活动布局.它实际上是一个列表活动,可以根据需要保存任意数量的选项(您只需将它们添加到上面活动中声明的数组列表中).

>创建以下名为sub_menu_item的布局xml文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:gravity="center_vertical" >

    <TextView
        android:id="@+id/option_title"
        android:layout_width="0dip"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textAppearance="@android:style/TextAppearance.Medium" />

    <CheckBox
        android:id="@+id/option_checkBox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

这是列表中每一行的布局,有一个文本视图和复选框(就像您已经使用的子菜单一样).

>创建一个名为MyActivity_Settings的新类,该类应包含以下内容：

public class MyActivity_Settings extends ListActivity {

    private ArrayList < SettingCheckBox > settingList;

    @Override
    public void onCreate ( Bundle savedInstanceState ) {
        super.onCreate(savedInstanceState);
        setContentView ( R.layout.sub_menu );
        setTitle ( "Add/Remove" );
        settingList = getIntent ().getSerializableExtra ( MainActivity.SETTING_CHECK_Box );
        if ( savedInstanceState != null ) {
            settingList = (ArrayList < SettingCheckBox >) savedInstanceState.getSerializable ( MainActivity.SETTING_CHECK_Box );
        }
        setlistadapter ( new MyActivity_Settings_Adapter ( this,R.layout.item_layout,settingList ) );
    }

    protected void onSaveInstanceState ( Bundle outState ) {
        super.onSaveInstanceState ( outState );
        outState.putSerializable ( MainActivity.SETTING_CHECK_Box,settingList );
    }

    @Override
    public void finish () {
        setResult ( RESULT_OK,new Intent ().putExtra ( MainActivity.SETTING_CHECK_Box,settingList ) );
        super.finish ();
    }

}

class MyActivity_Settings_Adapter extends ArrayAdapter < SettingCheckBox > {

    private final LayoutInflater layoutInflater;
    private final int itemResourceId;

    // Holder pattern (used instead of findViewById for better performance)
    static class ViewHolder {
        public TextView title;
        public CheckBox checkBox;
    }

    // Constructor
    public MyActivity_Settings_Adapter ( ListActivity context,int itemResourceId,List < SettingCheckBox > options ) {
        super ( context,itemResourceId,options );
        layoutInflater = context.getLayoutInflater ();
        this.itemResourceId = itemResourceId;
    }

    // Method called by the list view every time to display a row
    @Override
    public View getView ( int position,View convertView,ViewGroup parent ) {
        // Declare and initialize the row view
        View rowView = convertView;
        // Declare the row view holder
        ViewHolder viewHolder;
        // Check if an inflated view is provided
        if ( rowView == null ) {
            // A new view must be inflated
            rowView = layoutInflater.inflate ( itemResourceId,null );
            // Declare and initialize a view holder
            viewHolder = new ViewHolder ();
            // Retrieve a reference to the row title
            viewHolder.title = (TextView) rowView.findViewById ( R.id.option_title );
            // Retrieve a reference to the row check Box
            viewHolder.checkBox = (CheckBox) rowView.findViewById ( R.id.option_checkBox );
            // Store the view holder as tag
            rowView.setTag ( viewHolder );
        } // End if
        else
        // An inflated view is already provided,retrieve the stored view holder
        viewHolder = (ViewHolder) rowView.getTag ();

        // Set the option title
        viewHolder.title.setText ( getItem ( position ).getDescription () );
        // Set the option check Box state
        viewHolder.checkBox.setChecked ( getItem ( position ).getChecked () );
        // Assign a click listener to the checkBox
        viewHolder.checkBox.setonClickListener( new OnClickListener() {

            public void onClick ( View checkBox ) {
                // Retrieve the stored view holder
                ViewHolder viewHolder = (ViewHolder) ((View) checkBox.getParent()).getTag();
                // Update the option state
                getItem ( position ).setChecked ( ! getItem ( position ).getChecked () );
                // display the new option state
                viewHolder.checkBox.setChecked ( getItem ( position ).getChecked () );
            }
        });

        // Return the row view for display
        return rowView;
    } // End of getView

}

此类表示将充当子菜单的活动.正如我之前所说,它是一个List活动(因此应该扩展ListActivity).为了显示列表中的各种选项,您需要一个适配器(数组适配器足以满足这种情况),这是MyActivity_Settings_Adapter类(扩展ArrayAdapter)的角色.

如果列表活动完成(用户单击后退按钮,或活动外部显示为对话框的任何位置),则它(活动)将新选项列表返回给父活动,并使用新的选中值.

适配器将构建要显示的列表的每一行.
此外,适配器将为每个复选框分配一个单击侦听器,以便在选中(或取消选中)时,将相应地修改该选项.

如果单击子菜单外的任何位置(或只​​需按后退按钮),子菜单将消失,用户选择将保留在主活动的布尔数组中.

如果你不熟悉ListActivity和ArrayAdapter,这个tutorial会有很多帮助！

>不要忘记在你的android manifest xml文件中添加它(在应用程序标记中)：

<activity android:name=".MyActivity_Settings"
        android:theme="@android:style/Theme.Dialog" />

应用的主题(@android：style / Theme.Dialog)将使活动看起来像子菜单.

希望能帮助到你 ！我尝试过它,效果很好！尝试一下,让我知道会发生什么.