小编Ver*_*ert的帖子

我需要更改微调器弹出窗口的颜色.这是我到目前为止所尝试的: java代码:

ArrayAdapter<Integer> adapter_year = new ArrayAdapter<Integer>(this, R.drawable.custom_spinner_holidays, year);
adapter_year.setDropDownViewResource(R.layout.customize_spinner);

custom_spinner_holidays.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/text1"
    style="@drawable/custom_spinner"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:singleLine="true"
    android:textColor="@android:color/white" />

customize_spinner.xml

<?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="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/spinnertext"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#0193DE"
        android:textColor="#FFFFFF"
        android:textSize="18sp" />

</LinearLayout>

但它不起作用.当我点击微调器时,我收到错误.

由于我的弹出背景为白色,我需要更改微调器分隔符的颜色.我已尝试以下列方式设置微调器的样式,但它不起作用:

styles.xml

<style name="applicationTheme" parent="@android:style/Theme.Holo.Light">
    <item name="android:dropDownListViewStyle">@style/SpinnerStyle</item>
</style>

<style name="SpinnerStyle" parent="android:Widget.ListView.DropDown">
    <item name="android:divider">#0193DE</item>
    <item name="android:dividerHeight">1dp</item>
</style>

主要的xml

<Spinner
        android:id="@+id/year"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="bottom"
        android:background="@drawable/apptheme_spinner_default_holo_dark"
        android:layout_marginLeft="75dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="10dp"
        android:spinnerMode="dropdown"
        style="@style/SpinnerStyle" 
        android:popupBackground="#FFFFFF" />

java的

ArrayAdapter<Integer> adapter_year = new ArrayAdapter<Integer>(this, R.drawable.custom_spinner_holidays, year);
    adapter_year.setDropDownViewResource(R.layout.custom_spinner_popup);

custom_spinner_holidays.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/text1"
    style="?android:attr/spinnerItemStyle"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:singleLine="true"
    android:textColor="@android:color/white" />

custom_spinner_popup

<?xml version="1.0" encoding="utf-8"?>
<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/text1"
    style="?android:attr/spinnerDropDownItemStyle"
    android:layout_width="match_parent"
    android:layout_height="?android:attr/listPreferredItemHeight"
    android:ellipsize="marquee"
    android:singleLine="true"
    android:textColor="#0193DE" />

我可以将所有这些合并为一个吗？

我正在尝试将自定义图标用于 ExpandableListView 的组展开和折叠状态。但这似乎不起作用。即使输出消息按顺序工作，图标也不会改变。

    explistView.setOnGroupClickListener(new OnGroupClickListener()
    {
        @Override
        public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id)
        {
            groupIndicator = (ImageView) findViewById(R.id.group_indicator);
            if (parent.isGroupExpanded(groupPosition))
            {
                System.out.println("1");
                parent.collapseGroup(groupPosition);
                System.out.println("2");
                groupIndicator.setImageResource(R.drawable.expand_icon_35x35);
                System.out.println("3");
                adapter.notifyDataSetChanged();
            } 
            else
            {
                System.out.println("4");
                parent.expandGroup(groupPosition);
                System.out.println("5");
                groupIndicator.setImageResource(R.drawable.collapse_icon_35x35);
                System.out.println("6");
                adapter.notifyDataSetChanged();
            }
            return true;
        }
    });

在这个xml中我试图显示7个ImageView,因此我使用的是ScrollView.但是,在模拟器中它不会完全显示第一个ImageView.只显示其下半部分.我该如何解决这个问题？

<?xml version="1.0" encoding="utf-8"?>

<ScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" 
    android:background="@drawable/homescreen_bg">

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:orientation="vertical" >

        <ImageView
            android:id="@+id/header"
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            android:contentDescription="@string/Homescreen_header"
            android:src="@drawable/logoheader" />

        <ImageView
            android:id="@+id/empinfo_logo"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_marginTop="10dp"
            android:contentDescription="@string/Homescreen_emp_info"
            android:src="@drawable/employee_info" />

        <ImageView
            android:id="@+id/leaveinfo_logo"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_marginTop="10dp"
            android:contentDescription="@string/Homescreen_leave_info"
            android:src="@drawable/leave_info" />

        <ImageView
            android:id="@+id/holidays_logo"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_marginTop="10dp"
            android:contentDescription="@string/Homescreen_holidays"
            android:src="@drawable/holidays" />

        <ImageView
            android:id="@+id/leavereq_logo"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_marginTop="10dp"
            android:contentDescription="@string/Homescreen_leave_req"
            android:src="@drawable/leave_request" />

        <ImageView
            android:id="@+id/leavestatus_logo"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_marginTop="10dp"
            android:contentDescription="@string/Homescreen_leave_status"
            android:src="@drawable/leave_status" />

        <ImageView
            android:id="@+id/logout"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_marginTop="10dp"
            android:contentDescription="@string/logout_button"
            android:src="@drawable/logout" />
    </LinearLayout>

</ScrollView>