【发布时间】：2013-12-06 07:17:36
【问题描述】：
我正在使用这个Tutorial 创建带有单选按钮的自定义列表视图。在本教程中，当我们单击列表中的项目时，项目的颜色会发生变化。
当我在 4.0 以上测试此代码但在 4.0 以下无法正常工作时，会发生这种情况我不明白为什么？？？？
类 Blog.java
public class Blog extends Activity {
ListView listView;
ArrayList< String>arrayList; // list of the strings that should appear in ListView
ArrayAdapter arrayAdapter; // a middle man to bind ListView and array list
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.custom);
listView = (ListView) findViewById(R.id.lstDemo);
// LIST OF STRINGS / DATA THAT SHOULD APPEAR IN LISTVIEW HERE WE HAVE HARD CODED IT WE CAN TAKE THIS INPUT FROM USER AS WELL
arrayList = new ArrayList();
arrayList.add("India");
arrayList.add("USA");
arrayList.add("England");
arrayList.add("Singapur");
arrayList.add("China");
arrayList.add("Canada");
arrayList.add("Srilanka");
arrayList.add("SouthAfrica");
arrayAdapter = new ArrayAdapter(getApplicationContext(), android.R.layout.simple_list_item_single_choice,arrayList);
listView.setAdapter(arrayAdapter);
// LETS HIGHLIGHT SELECTED ITEMS
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView arg0, View view, int position,
long itemId) {
/*
* when we click on item on list view we can get it catch item here.
* so view is the item clicked in list view and position is the position
* of that item in list view which was clicked.
*
* Now that we know which item is click we can easily change the color
* of text but when we click on next item we we have to deselect the old
* selected item means recolor it back to default , and then hight the
* new selected item by coloring it .
*
* So here's the code of doing it.
*
*
* */
CheckedTextView textView = (CheckedTextView) view;
for (int i = 0; i < listView.getCount(); i++) {
textView= (CheckedTextView) listView.getChildAt(i);
if (textView != null) {
textView.setTextColor(Color.WHITE);
}
}
listView.invalidate();
textView = (CheckedTextView) view;
if (textView != null) {
textView.setTextColor(Color.BLUE);
}
}
});
}
}
我的 xml 视图
<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="@+id/lstDemo"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:choiceMode="singleChoice">
</ListView>
【问题讨论】：
-
我可以知道为什么这是降级我的问题
-
请提供更多信息和代码以支持....
-
因为您的问题没有指定。这个问题毫无意义。把你做了什么和你需要什么
-
@AndroidHacker 现在你帮帮我
-
所以你无法创建列表视图？
标签： android listview android-listview