我正在尝试创建任务管理器,而我只有一个问题。我有一个充气的列表视图。列表视图中的所有元素都是正确的。问题是,当我选择一个项目时,listview会选择另一个项目。我听说列表视图重新填充列表,因为它向下滚动以节省内存。我认为这可能是某种问题。这是problem的图片。 如果我加载了更多的应用程序,那么它会一次选择多个应用程序。Listview在点击时选择多个项目
这是我的适配器和活性和XML相关的
public class TaskAdapter extends BaseAdapter{
private Context mContext;
private List<TaskInfo> mListAppInfo;
private PackageManager mPack;
public TaskAdapter(Context c, List<TaskInfo> list, PackageManager pack) {
mContext = c;
mListAppInfo = list;
mPack = pack;
}
@Override
public int getCount() {
return mListAppInfo.size();
}
@Override
public Object getItem(int position) {
return mListAppInfo.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
TaskInfo entry = mListAppInfo.get(position);
if (convertView == null)
{
LayoutInflater inflater = LayoutInflater.from(mContext);
//System.out.println("Setting LayoutInflater in TaskAdapter " +mContext +" " +R.layout.taskinfo +" " +R.id.tmbox);
convertView = inflater.inflate(R.layout.taskinfo,null);
}
ImageView ivIcon = (ImageView)convertView.findViewById(R.id.tmImage);
ivIcon.setImageDrawable(entry.getIcon());
TextView tvName = (TextView)convertView.findViewById(R.id.tmbox);
tvName.setText(entry.getName());
convertView.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v) {
final CheckBox checkBox = (CheckBox)v.findViewById(R.id.tmbox);
if(v.isSelected())
{
System.out.println("Listview not selected ");
//CK.get(arg2).setChecked(false);
checkBox.setChecked(false);
v.setSelected(false);
}
else
{
System.out.println("Listview selected ");
//CK.get(arg2).setChecked(true);
checkBox.setChecked(true);
v.setSelected(true);
}
}
});
return convertView;
public class TaskManager extends Activity implements Runnable
{
private ProgressDialog pd;
private TextView ram;
private String s;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.taskpage);
setTitleColor(Color.YELLOW);
Thread thread = new Thread(this);
thread.start();
}
@Override
public void run()
{
//System.out.println("In Taskmanager Run() Thread");
final PackageManager pm = getPackageManager();
final ListView box = (ListView) findViewById(R.id.cBoxSpace);
final List<TaskInfo> CK = populate(box, pm);
runOnUiThread(new Runnable()
{
@Override
public void run()
{
ram.setText(s);
box.setAdapter(new TaskAdapter(TaskManager.this, CK, pm));
//System.out.println("In Taskmanager runnable Run()");
endChecked(CK);
}
});
handler.sendEmptyMessage(0);
}
Taskinfo.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center_horizontal">
<ImageView
android:id="@+id/tmImage"
android:layout_width="48dp"
android:layout_height="48dp"
android:scaleType="centerCrop"
android:adjustViewBounds="false"
android:focusable="false" />
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tmbox"
android:lines="2"/>
</LinearLayout>
Taskpage.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="fill_parent"
android:orientation="vertical">
<ListView
android:id="@+id/cBoxSpace"
android:layout_width="wrap_content"
android:layout_height="400dp"
android:orientation="vertical"/>
<TextView
android:id="@+id/RAM"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="18sp" />
<Button
android:id="@+id/endButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="End Selected Tasks" />
</LinearLayout>
任何想法是什么原因复式项目的代码选择与一个单一的点击将非常感激。我一直在搞不同的实现,听众和listadapters,但无济于事。
当选择多个项目时,多个选项是否出现在屏幕上可见的项目上或仅在滚动时出现? – 2012-03-20 17:33:56
对不起,没有编辑您的文章,意味着编辑我的。<我在编辑中解释了答案 – xlph 2012-03-20 20:25:09