问题描述
我疑惑这一点。我正在寻找在2小时内不能明白发生了什么。
I'm puzzled with this. I am searching for over 2 hours and cannot understand what is happening.
我有我想要的物品（行）是可选列表视图。
要做到这一点，我有一个选择，我设置为背景对我行的布局。
I have a Listview that I want the items (rows) to be selectable.To achieve this, I have a selector that I set as a background to my row layout.
ListView控件在fragment.xml之布局文件定义是这样的：
The ListView is defined this way in the fragment.xml layout file:
<ListView
android:id="@+id/lst_friends"
android:layout_width="match_parent"
android:dividerHeight="1dp"
android:divider="#ff0000"
android:layout_height="0dp"
android:layout_weight="1.0" />
选择器（ bg_row_contact.xml ）是这样的：
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@android:color/white" android:state_selected="false"/>
<item android:drawable="@color/pink" android:state_selected="true"/>
</selector>
我行布局（ row_contact.xml ）是这样的：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/bg_row_contact"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_margin="7dp"
android:gravity="center" >
<ImageView
android:id="@+id/img_lst"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="@string/contentDescription_pic" />
</LinearLayout>
<TextView
android:id="@+id/txt_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginRight="20dp"
android:layout_marginLeft="10dp"
android:ellipsize="end"
android:maxLines="2"
android:textColor="#000000"
android:textSize="16sp" />
</LinearLayout>
现在，我有一个自定义适配器，在我这样做是为了纪念项目作为选择时的行，这完美的作品在用户点击：
Now, I have a custom adapter, in which I do this to mark an item as selected when the user clicks on the row, which works perfect:
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// View from recycle
View row = convertView;
// Handle inflation and make sure not to re-use a header view
if (row == null) {
LayoutInflater inflater = (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.row_contact, null);
row.setTag(position);
row.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
v.setSelected(!v.isSelected());
}
});
}
boolean condition = (position==3);
row.setSelected(condition);
}
我现在的问题是，我想很明显保持选中状态时，列表视图滚动。所以，我有我对证，并设置该行对这一选择或不化，你可以看到在一个条件
My problem now is that I want to obviously maintain the selection state when the listview is scrolled. So I have a condition which I check against and set the row to selected or not based on this, as you can see in the
row.setSelected(boolean condition);
的问题是，虽然条件对于一些行属实，该行的背景选择不工作，行不highlighed。的
The problem is that although the condition is true for some rows, the row's background selector is not working and the row is not highlighed.
我已经试过一切，但不能找到什么喊来是怎么回事。
I have tried everything, but cannot find what the bleep is going on here.
有什么建议？
推荐答案
我一直在玩弄一点，我想我找到了解决您的问题。这一件作品与 list.setChoiceMode（ListView.CHOICE_MODE_MULTIPLE）;
I've been playing around a little and I think I found a solution to your problem. This one works with list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
您可以通过 list.getCheckedItemPositions所选的项目（）。关于它的唯一奇怪的是，在你的选择，你必须使用的android：state_activated 而不是的android：state_checked
You can get the selected items via list.getCheckedItemPositions(). The only weird thing about it is, that in your selector you have to use android:state_activatedinstead of android:state_checked.
活动code：
ListView list = (ListView) findViewById(R.id.listView);
// dummy values
final String[] values = new String[] { "a", "b", "c", "d", "e", "f", "g",
"h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s",
"t", "u", "w", "x", "y", "z" };
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
R.layout.row_contact, values){
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// View from recycle
View row = convertView;
// Handle inflation and make sure not to re-use a header view
if (row == null) {
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.row_contact, null);
row.setTag(position);
}
((TextView)row.findViewById(R.id.txt_title)).setText(values[position]);
return row;
}
};
list.setAdapter(adapter);
list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
选择器（bg_row_contact.xml）
The selector (bg_row_contact.xml)
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@android:color/white" android:state_activated="false"/>
<item android:drawable="@android:color/black" android:state_activated="true"/>
</selector>
希望这有助于。
这篇关于ListView和行选择器不工作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！