我面临着针对listview的自定义适配器的奇怪问题 我的适配器每隔10条记录重复项目的ID。
我非常感谢任何帮助和/或想法
我的ListActivity
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_backuplist); // Get main display layout
lv = (ListView) findViewById(android.R.id.list);
lists = new ArrayList<BackupListView>();
int j = 50;
for (int i = 0; i < 15; i++)
{
String fileName = ((i % 2) == 0) ? "sample.csv" : "sample.vcf";
String fileExt = ((i % 2) == 0) ? "csv" : "vcf";
lists.add(new BackupListView(fileName + "\ndate 2014/05/20", j, fileExt, "210"));
j++;
}
int x = lists.size();
BackupListView[] toArray = new BackupListView[x];
toArray = lists.toArray(toArray);
adapter = new BackupListAdapter(this, R.layout.custom_backup_listview_rows, toArray);
lv.setAdapter(adapter);
lv.setClickable(true);
lv.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id)
{
dspDialog();
}
});
}
这是我的自定义适配器
public class BackupListAdapter extends ArrayAdapter<BackupListView>
{
private Context context;
private int resID;
BackupListView[] data = null;
private ArrayList<String> checkedItem = new ArrayList<String>();
public BackupListAdapter(Context context, int resource, BackupListView[] objects)
{
super(context, resource, objects);
this.context = context;
this.resID = resource;
this.data = objects;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent)
{
CustomHolder holder = null;
if (convertView == null)
{
LayoutInflater inflate = ((Activity) context).getLayoutInflater();
convertView = inflate.inflate(resID, null);
holder = new CustomHolder();
holder.cb = (CheckBox) convertView.findViewById(R.id.custom_checkbox);
holder.im = (ImageView) convertView.findViewById(R.id.img_file_ext_icon);
holder.tw = (TextView) convertView.findViewById(R.id.custom_textView);
holder.bt = (ImageView) convertView.findViewById(R.id.custom_button);
final BackupListView lists = data[position];
holder.tw.setText(lists.getText() + " " + lists.getFileSize() + "kb");
holder.id = lists.getId();
Log.i("TEST ", "List getId " + lists.getId());
// Check box event
holder.cb.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
if (((CompoundButton) v).isChecked())
{
checkedItem.add("" + lists.getId());
}
else
{
checkedItem.remove("" + lists.getId());
}
}
});
// Set CSV file extension icon
if(lists.getExt().equals("csv"))
holder.im.setBackgroundResource(R.drawable.icon_csv);
else
holder.im.setBackgroundResource(R.drawable.icon_vcf);
// Button event
holder.bt.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
final View inflater;
inflater = ((Activity) context).getLayoutInflater().inflate(
R.layout.dialog_filename_change, null);
AlertDialog.Builder dialog = new AlertDialog.Builder(
context.getApplicationContext());
dialog.setTitle("Enter Pass");
dialog.setView(inflater);
dialog.setInverseBackgroundForced(true);
dialog.setNegativeButton("Cancel", null);
dialog.setPositiveButton("OK", new OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
Intent i = new Intent(context.getApplicationContext(),
PhoneBookDetail.class);
i.putExtra("id", lists.getId());
context.startActivity(i);
}
});
dialog.create();
Log.i("TEST", " Clicked " + lists.getId());
//dialog.show();
}
});
convertView.setTag(holder);
}
else
{
holder = (CustomHolder) convertView.getTag();
}
return convertView;
}
public class CustomHolder
{
CheckBox cb;
ImageView im;
TextView tw;
ImageView bt;
int id;
}
}
结果是
04-18 16:31:12.840: I/TEST(21986): List getId 50
04-18 16:31:12.856: I/TEST(21986): List getId 51
04-18 16:31:12.863: I/TEST(21986): List getId 52
04-18 16:31:12.871: I/TEST(21986): List getId 53
04-18 16:31:12.879: I/TEST(21986): List getId 54
04-18 16:31:12.887: I/TEST(21986): List getId 55
04-18 16:31:12.895: I/TEST(21986): List getId 56
04-18 16:31:12.903: I/TEST(21986): List getId 57
04-18 16:31:12.910: I/TEST(21986): List getId 58
04-18 16:31:14.535: I/TEST(21986): Clicked 55
04-18 16:31:15.840: I/TEST(21986): Clicked 54
04-18 16:31:16.871: I/TEST(21986): Clicked 53
04-18 16:31:17.238: I/TEST(21986): Clicked 52
04-18 16:31:17.910: I/TEST(21986): Clicked 53
04-18 16:31:18.309: I/TEST(21986): Clicked 54
04-18 16:31:20.121: I/TEST(21986): Clicked 56
04-18 16:31:20.645: I/TEST(21986): Clicked 56
04-18 16:31:21.442: I/TEST(21986): Clicked 57
04-18 16:31:23.067: I/TEST(21986): Clicked 58
04-18 16:31:24.785: I/TEST(21986): Clicked 53
04-18 16:31:26.481: I/TEST(21986): Clicked 50
04-18 16:31:27.903: I/TEST(21986): Clicked 58
04-18 16:31:28.965: I/TEST(21986): List getId 59
04-18 16:31:30.090: I/TEST(21986): Clicked 59
04-18 16:31:33.520: I/TEST(21986): Clicked 59
04-18 16:31:35.559: I/TEST(21986): Clicked 50
答案 0 :(得分：0)
初始化数组：
Map<Integer,boolean> checkBoxMap = new Map<Integer,boolean>();
在getView方法中，应首先实现以下内容。
if (convertView == null)
{
LayoutInflater inflate = ((Activity) context).getLayoutInflater();
convertView = inflate.inflate(resID, null);
holder = new CustomHolder();
holder.cb = (CheckBox) convertView.findViewById(R.id.custom_checkbox);
holder.im = (ImageView) convertView.findViewById(R.id.img_file_ext_icon);
holder.tw = (TextView) convertView.findViewById(R.id.custom_textView);
holder.bt = (ImageView) convertView.findViewById(R.id.custom_button); convertView.setTag(holder);
} else {
holder = (CustomHolder) convertView.getTag();
}
// Check box event
holder.cb.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
checkBoxMap.put(position,((CompoundButton) v).isChecked())
}
});
holder.cb.setChecked(checkBoxMap.get(position));
剩下的所有监听器和setText都应该在上面的代码之后。
我的意思是以下所有内容都应遵循以上代码。
final BackupListView lists = data[position];
holder.tw.setText(lists.getText() + " " + lists.getFileSize() + "kb");
holder.id = lists.getId();
Log.i("TEST ", "List getId " + lists.getId());
// Check box event
holder.cb.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
if (((CompoundButton) v).isChecked())
{
checkedItem.add("" + lists.getId());
}
else
{
checkedItem.remove("" + lists.getId());
}
}
});
// Set CSV file extension icon
if(lists.getExt().equals("csv"))
holder.im.setBackgroundResource(R.drawable.icon_csv);
else
holder.im.setBackgroundResource(R.drawable.icon_vcf);
// Button event
holder.bt.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
final View inflater;
inflater = ((Activity) context).getLayoutInflater().inflate(
R.layout.dialog_filename_change, null);
AlertDialog.Builder dialog = new AlertDialog.Builder(
context.getApplicationContext());
dialog.setTitle("Enter Pass");
dialog.setView(inflater);
dialog.setInverseBackgroundForced(true);
dialog.setNegativeButton("Cancel", null);
dialog.setPositiveButton("OK", new OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
Intent i = new Intent(context.getApplicationContext(),
PhoneBookDetail.class);
i.putExtra("id", lists.getId());
context.startActivity(i);
}
});
dialog.create();
Log.i("TEST", " Clicked " + lists.getId());
//dialog.show();
}
});
答案 1 :(得分：0)
列出变量是最终的，并在点击指向特定位置时使用..当视图被回收时..列表保持不变，因此你得到重复