当记录超过5条时似乎存在问题 在管理实践中显示。对于例如如果要显示6条记录 管理实践。如果我选中复选框编号1，则复选框编号为6 得到检查。如果有7条记录，如果我查看第2条记录，那么 第7条记录也会自动检查。我不知道那里发生什么事我很困惑，请检查我的代码让我知道那里有什么问题。
public class ManagePracticeLogAdapter extends BaseAdapter
{
//Variables to save class object.
Context context;
// variable to instantiates a layout XML file into its corresponding View objects.
LayoutInflater inflater;
MenuItem menu,addlog;
List<Integer> SelectedBox= new ArrayList<Integer>();;
// Variable to accept list data from Produce log activity
ArrayList<HashMap<String, String>> data;
ArrayList<HashMap<String, String>> temp_data;
HashMap<String, String> resultp = new HashMap<String, String>();
List<String> deleteData=new ArrayList<String>();
// Constructor to accept class instance and data.
public ManagePracticeLogAdapter(Context context,
ArrayList<HashMap<String, String>> arraylist,MenuItem mymenu,MenuItem myaddlog)
{
this.context = context;
data = arraylist;
//temp_data.addAll(data);
menu=mymenu;
addlog=myaddlog;
}
@Override
public int getCount()
{
return data.size();
}
@Override
public Object getItem(int position)
{
return null;
}
@Override
public long getItemId(int position)
{
return 0;
}
// Method to display data of Produce log Activity in list view
@Override
public View getView(final int position, View convertView, ViewGroup parent)
{
if(convertView==null)
{
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView= inflater.inflate(R.layout.logitem1, parent, false);
}
TextView datetime;
TextView totminutes;
TextView skills;
TextView weather;
TextView day_night_icon;
final CheckBox chkdelete;
TextView approval_icon;
// Get the position
resultp = data.get(position);
// Locate the TextViews in listview_item.xml
datetime = (TextView) convertView.findViewById(R.id.id_datetime);
totminutes = (TextView) convertView.findViewById(R.id.totminutes);
skills= (TextView) convertView.findViewById(R.id.id_skills);
weather=(TextView)convertView.findViewById(R.id.id_weather);
day_night_icon=(TextView)convertView.findViewById(R.id.day_night_icon);
approval_icon=(TextView)convertView.findViewById(R.id.conditions);
chkdelete=(CheckBox)convertView.findViewById(R.id.id_chkDelete);
// Capture position and set results to the TextViews
datetime.setText(resultp.get("date_time"));
if(!resultp.get("Day_minutes").toString().equalsIgnoreCase("0"))
{
totminutes.setText(resultp.get("Day_minutes")+" min");
day_night_icon.setBackgroundResource(R.drawable.sun);
}else
{
totminutes.setText(resultp.get("Night_minutes")+" min");
day_night_icon.setBackgroundResource(R.drawable.moon);
}
skills.setText(resultp.get("Skill"));
weather.setText(resultp.get("weather"));
String supervisorText=resultp.get("super");
Log.w("SUPERVISOR", supervisorText);
if(supervisorText.equals("No supervisor"))
{
approval_icon.setBackgroundResource(R.drawable.pending);
}else
{
approval_icon.setBackgroundResource(R.drawable.approve);
}
String fontPath = "fonts/Roboto-Light.ttf";
Typeface tf = Typeface.createFromAsset(context.getAssets(), fontPath);
datetime.setTypeface(tf);
totminutes.setTypeface(tf);
skills.setTypeface(tf);
weather.setTypeface(tf);
// chkdelete.setTag(R.id.id_chkDelete);
chkdelete.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
// int checkBoxId = (Integer) buttonView.getTag();
if(SelectedBox.size()-1==0)
{
menu.setVisible(false);
addlog.setVisible(true);
}else
{
addlog.setVisible(false);
}
if(isChecked)
{
SelectedBox.add(position);
menu.setVisible(true);
addlog.setVisible(false);
}else /*if(!isChecked)*/
{
SelectedBox.remove(SelectedBox.indexOf(position));
}
}
});
menu.setOnMenuItemClickListener(new OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
// TODO Auto-generated method stub
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
// set title
alertDialogBuilder.setTitle("Student Driving Practice Log");
// set dialog message
alertDialogBuilder
.setMessage("Are you sure want to Delete Record!")
.setCancelable(false)
.setPositiveButton("Yes",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
try
{
NewNewDataHelper db=new NewNewDataHelper(context);
if(!SelectedBox.isEmpty())
{
for(int i=0;i<SelectedBox.size();i++)
{
resultp=data.get(SelectedBox.get(i));
String str[]=resultp.get("date_time").split(" ");
Log.d("Checked Element",str[0]+"\n"+str[1]+"\n"+resultp.get("Skill"));
db.DeleteSingleLog(resultp.get("Skill"),str[0],str[1]);
/*resultp=data.get(SelectedBox.get(i));
String str[]=resultp.get("date_time").split(" ");
db.DeleteSingleLog(resultp.get("Skill"),str[0],str[1]);*/
Toast.makeText(context,"Record Deleted", Toast.LENGTH_LONG).show();
}
Log.d("LISTSTSTSTST", SelectedBox.toString());
Intent intent = new Intent(context,ManagePracticeLogActivity.class);
intent.putExtra("s11", "delete");
context.startActivity(intent);
}
}catch(Exception e)
{
}
}
})
.setNegativeButton("No",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, just close
// the dialog box and do nothing
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
return false;
}
});
convertView.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View arg0)
{
resultp = data.get(position);
String str1 = null;
String str[]=resultp.get("date_time").toString().split(" ");
str1=str[0]+"~"+resultp.get("Skill")+"~"+str[1];
Log.d("PARTICULAR SKILLLLL", str1);
Intent intent = new Intent(context,LogEdit.class);
intent.putExtra("s11","Update Practice");
intent.putExtra("dataupdate",str1);
context.startActivity(intent);
}
});
return convertView;
}
private void deleteItems(List<Integer> list)
{
data.clear();
}
}
答案 0 :(得分：0)
看看this。这将解释listviews中复选框的“问题”。如果需要，还有一个解决方案链接：）
答案 1 :(得分：0)
在getView中加载视图时，需要为该特定项设置检查状态。我假设您在每一行都将此信息存储在某处？只需检索行（位置）的正确状态，并在复选框上设置正确的状态。您看到该行为的原因是因为在ListView行中重用了这些行。第6行实际上是第1行。这样做是为了节省内存并优化ListView以提高速度。
答案 2 :(得分：0)
在getView()添加内容
if(SelectedBox.contains(new Integer(position))) {
chkdelete.setChecked(true);
} else {
chkdelete.setChecked(false);
}
答案 3 :(得分：0)
问题是，由于ListView的回收而导致视图被回收，并且不维护Checkbox（检查或取消选中）的值。您可以查看this链接。