Android中项目上的自定义ListView点击问题 [英] Custom ListView click issue on items in Android
问题描述
所以我有一个自定义的ListView对象.列表项具有两个彼此堆叠的textview，以及一个水平进度条，在我实际执行操作之前，我希望一直隐藏该进度条.最右边是一个复选框，仅在用户需要将更新下载到其数据库时才显示.通过将可见性设置为Visibility.GONE禁用复选框时，我可以单击列表项.当该复选框可见时，我无法单击列表中除复选框以外的任何内容.我已经进行了一些搜索，但没有找到与我目前的情况有关的任何内容.我发现了这个问题，但是由于我使用了覆盖的ArrayAdapter我使用ArrayLists内部包含数据库列表.我是否只需要获取LinearLayout视图并像Tom一样添加onClickListener?我不确定.
So I have a custom ListView object. The list items have two textviews stacked on top of each other, plus a horizontal progress bar that I want to remain hidden until I actually do something. To the far right is a checkbox that I only want to display when the user needs to download updates to their database(s). When I disable the checkbox by setting the visibility to Visibility.GONE, I am able to click on the list items. When the checkbox is visible, I am unable to click on anything in the list except the checkboxes. I've done some searching but haven't found anything relevant to my current situation. I found this question but I'm using an overridden ArrayAdapter since I'm using ArrayLists to contain the list of databases internally. Do I just need to get the LinearLayout view and add an onClickListener like Tom did? I'm not sure.
这是列表视图行布局XML:
Here's the listview row layout XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:padding="6dip">
<LinearLayout
android:orientation="vertical"
android:layout_width="0dip"
android:layout_weight="1"
android:layout_height="fill_parent">
<TextView
android:id="@+id/UpdateNameText"
android:layout_width="wrap_content"
android:layout_height="0dip"
android:layout_weight="1"
android:textSize="18sp"
android:gravity="center_vertical"
/>
<TextView
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:id="@+id/UpdateStatusText"
android:singleLine="true"
android:ellipsize="marquee"
/>
<ProgressBar android:id="@+id/UpdateProgress"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:indeterminateOnly="false"
android:progressDrawable="@android:drawable/progress_horizontal"
android:indeterminateDrawable="@android:drawable/progress_indeterminate_horizontal"
android:minHeight="10dip"
android:maxHeight="10dip"
/>
</LinearLayout>
<CheckBox android:text=""
android:id="@+id/UpdateCheckBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
这是扩展ListActivity的类.显然，它仍在开发中，因此可以原谅遗漏或遗留的东西:
And here's the class that extends the ListActivity. Obviously it's still in development so forgive the things that are missing or might be left laying around:
public class UpdateActivity extends ListActivity {
AccountManager lookupDb;
boolean allSelected;
UpdateListAdapter list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
lookupDb = new AccountManager(this);
lookupDb.loadUpdates();
setContentView(R.layout.update);
allSelected = false;
list = new UpdateListAdapter(this, R.layout.update_row, lookupDb.getUpdateItems());
setListAdapter(list);
Button btnEnterRegCode = (Button)findViewById(R.id.btnUpdateRegister);
btnEnterRegCode.setVisibility(View.GONE);
Button btnSelectAll = (Button)findViewById(R.id.btnSelectAll);
btnSelectAll.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
allSelected = !allSelected;
for(int i=0; i < lookupDb.getUpdateItems().size(); i++) {
lookupDb.getUpdateItem(i).setSelected(!lookupDb.getUpdateItem(i).isSelected());
}
list.notifyDataSetChanged();
// loop through each UpdateItem and set the selected attribute to the inverse
} // end onClick
}); // end setOnClickListener
Button btnUpdate = (Button)findViewById(R.id.btnUpdate);
btnUpdate.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
} // end onClick
}); // end setOnClickListener
lookupDb.close();
} // end onCreate
@Override
protected void onDestroy() {
super.onDestroy();
for (UpdateItem item : lookupDb.getUpdateItems()) {
item.getDatabase().close();
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
UpdateItem item = lookupDb.getUpdateItem(position);
if (item != null) {
item.setSelected(!item.isSelected());
list.notifyDataSetChanged();
}
}
private class UpdateListAdapter extends ArrayAdapter<UpdateItem> {
private List<UpdateItem> items;
public UpdateListAdapter(Context context, int textViewResourceId, List<UpdateItem> items) {
super(context, textViewResourceId, items);
this.items = items;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = null;
if (convertView == null) {
LayoutInflater li = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = li.inflate(R.layout.update_row, null);
} else {
row = convertView;
}
UpdateItem item = items.get(position);
if (item != null) {
TextView upper = (TextView)row.findViewById(R.id.UpdateNameText);
TextView lower = (TextView)row.findViewById(R.id.UpdateStatusText);
CheckBox cb = (CheckBox)row.findViewById(R.id.UpdateCheckBox);
upper.setText(item.getName());
lower.setText(item.getStatusText());
if (item.getStatusCode() == UpdateItem.UP_TO_DATE) {
cb.setVisibility(View.GONE);
} else {
cb.setVisibility(View.VISIBLE);
cb.setChecked(item.isSelected());
}
ProgressBar pb = (ProgressBar)row.findViewById(R.id.UpdateProgress);
pb.setVisibility(View.GONE);
}
return row;
}
} // end inner class UpdateListAdapter
}
我仍然有这个问题.我在作弊并将onClick处理程序添加到textviews中，但是当我不单击复选框时，根本没有调用onListItemClick()函数似乎非常愚蠢.
edit: I'm still having this problem. I'm cheating and adding onClick handlers to the textviews but it seems extremely stupid that my onListItemClick() function is not being called at all when I am not clicking on my checkbox.
推荐答案
问题是Android不允许您选择列表元素上具有可聚焦元素的列表项.我修改了列表项上的复选框，使其具有如下属性:
The issue is that Android doesn't allow you to select list items that have elements on them that are focusable. I modified the checkbox on the list item to have an attribute like so:
android:focusable="false"
现在，我的包含复选框的列表项(也适用于按钮)在传统意义上是可选的"(它们亮起，您可以单击列表项中的任何位置，并且将触发"onListItemClick"处理程序，依此类推).
Now my list items that contain checkboxes (works for buttons too) are "selectable" in the traditional sense (they light up, you can click anywhere in the list item and the "onListItemClick" handler will fire, etc).
作为一个更新，评论者提到只是一个注释，在更改按钮的可见性之后，我不得不再次以编程方式禁用焦点."
As an update, a commenter mentioned "Just a note, after changing the visibility of the button I had to programmatically disable the focus again."
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