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嗨我正在使用自定义列表视图，我的列表项包含复选框。当用现有值更新列表视图时，背景被改变，所以它工作的很好。但是当我点击检查按钮时，在那个时候背景不会改变，加载一些后再改变背景。我的问题是在检查项目时背景需要立即更改。Android中的自定义列表项更改背景
这是我的适配器类。
public class GuestListAdapter extends BaseAdapter implements OnClickListener {
private String strExe;
AlertDialog.Builder builder;
Context context;
private ArrayList<String> arrayListFirstName;
private ArrayList<String> arrayListLastName;
private ArrayList<String> arrayListGuests;
private ArrayList<String> arrayCustomOne;
private ArrayList<String> arTempId;
private ArrayList<Boolean> chickinlist;
public static ArrayList<Integer> arrCheckedItems;
public static ArrayList<Integer> arrUnCheckedItems;
Button btnInfo;
private SQLiteAdapter mySqliteAdapter;
private GuestListScreen myGuestList;
private RelativeLayout views;
// private AlertDialog alertDialog = null;
private ArrayList<Boolean> checks = new ArrayList<Boolean>();
public GuestListAdapter(Context mcontext, ArrayList<String> arrListFN,
ArrayList<String> arrListLN, ArrayList<String> arrListGuest,
ArrayList<String> arrTiketID, ArrayList<String> arrCustOne,
ArrayList<Boolean> chicklist) {
clearAdapter();
arrayListFirstName = new ArrayList<String>();
arrayListLastName = new ArrayList<String>();
arrayListGuests = new ArrayList<String>();
arrayCustomOne = new ArrayList<String>();
arTempId = new ArrayList<String>();
chickinlist = new ArrayList<Boolean>();
arrCheckedItems = new ArrayList<Integer>();
arrUnCheckedItems = new ArrayList<Integer>();
arrayListFirstName = arrListFN;
arrayListLastName = arrListLN;
arrayListGuests = arrListGuest;
arrayCustomOne = arrCustOne;
arTempId = arrTiketID;
chickinlist = chicklist;
context = mcontext;
mySqliteAdapter = new SQLiteAdapter(context);
for (int i = 0; i < arrayListFirstName.size(); i++) {
checks.add(i, false);
}
}
@Override
public int getCount() {
// TODO Auto-generated method stub
Log.d("", "getCount" + arrayListFirstName.size());
return arrayListFirstName.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
Log.d("", "getItem" + arrayListFirstName.size());
return arrayListFirstName.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View view, ViewGroup parent) {
final int pos = position;
views = null;
LayoutInflater layoutInflator = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
views = (RelativeLayout) layoutInflator.inflate(
R.layout.guest_list_item, null);
final CheckBox chk = (CheckBox) views.getChildAt(0);
// Log.d("", "CheckBox Pos "+position);
chk.setId(position);
TextView txtView = (TextView) views.getChildAt(1);
TextView txtView2 = (TextView) views.getChildAt(2);
TextView txtView3 = (TextView) views.getChildAt(3);
final TextView txtView4 = (TextView) views.getChildAt(4);
TextView txtView5 = (TextView) views.getChildAt(6);
txtView5.setId(position);
// Log.d("", "Button Pos "+position);
txtView4.setId(position);
txtView4.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(context, InfoScreen.class);
intent.putExtra("IDVALUE",arTempId.get(txtView4.getId()));
intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
context.startActivity(intent);
// System.out.println(v + "##########" + " " + v.getId());
// System.out.println(v + "##########" + " " + arTempId.get(txtView4.getId()));
// System.out.println(v + "##########" + " " + chickinlist.get(txtView4.getId()));
}
});
Log.e("", "****************************************************** ");
// Log.v("", "Adapter arr pos " + pos);
// Log.v("", "Adapter arr position " + position);
Log.v("", "Adapter arr size " + arrayListFirstName.size());
Log.v("", "Passsing arr size " + chickinlist.size());
for (int dd = 0; dd < arrayListFirstName.size(); dd++) {
if (position == dd) {
// Log.d("", "Passsing arr size " + chickinlist.size());
Boolean result = chickinlist.get(position);
// Log.d("", "After " + result);
if (result == true) {
chk.setChecked(true);
arrCheckedItems.add(position);
views.setBackgroundResource(R.drawable.list_item_checked);
} else {
chk.setChecked(false);
arrUnCheckedItems.add(position);
views.setBackgroundResource(R.drawable.list_item_unchecked);
}
txtView.setText(arrayListFirstName.get(position));
txtView2.setText(arrayListLastName.get(position));
txtView3.setText("(" + arrayListGuests.get(position) + ")");
if(arrayCustomOne.get(position).equalsIgnoreCase("0")||arrayCustomOne.get(position).equalsIgnoreCase(null)||arrayCustomOne.get(position).equalsIgnoreCase(""))
{
txtView5.setText("");
}else
{
txtView5.setText(arrayCustomOne.get(position));
}
}
}
chk.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
strExe = "update ticket_details set checkin_status=1 where tempid="+arTempId.get(chk.getId());
// Log.d("Adapter", "Checked Temp Id "+arTempId.get(chk.getId()));
Log.d("", "Position "+chk.getId()+"tempid "+arTempId.get(chk.getId()));
if (isChecked) {
// views.setBackgroundResource(R.drawable.list_item_checked);
AlertDialog.Builder builder = new AlertDialog.Builder(
context);
builder.create();
builder.setMessage(arrayListFirstName.get(chk.getId())
+ " " + arrayListLastName.get(chk.getId())
+ " has been checked in.");
builder.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
// myGuestList = new GuestListScreen();
mySqliteAdapter.executeCheckQurey(strExe);
// myGuestList.ListUpdate();
dialog.dismiss();
}
}).show();
// Log.d("", "ID = " + buttonView.getId());
} else {
// views.setBackgroundResource(R.drawable.list_item_unchecked);
strExe = "update ticket_details set checkin_status=0 where tempid="+arTempId.get(chk.getId());
mySqliteAdapter.executeCheckQurey(strExe);
// Toast.makeText(context, "check release", Toast.LENGTH_SHORT)
// .show();
}
}
});
return views;
}
@Override
public void onClick(View view) {
// TODO Auto-generated method stub
Integer index = (Integer) view.getTag();
boolean state = checks.get(index.intValue());
checks.set(index.intValue(), !state);
}
// private void showADialog(int posit) {
//
// AlertDialog.Builder builder = new AlertDialog.Builder(
// context);
// builder.create();
// builder.setMessage("The clicked row is "
// + arrayListFirstName.get(posit));
// builder.setPositiveButton("Ok?", new DialogInterface.OnClickListener() {
//
// @Override
// public void onClick(DialogInterface dialog, int which) {
// dialog.dismiss();
// }
//
// }).show();
// }
public void clearAdapter() {
if (arrayListFirstName != null) {
arrayListFirstName.clear();
arrayListFirstName = null;
arrayListLastName.clear();
arrayListLastName = null;
arrayListGuests.clear();
arrayListGuests = null;
arrayCustomOne.clear();
arrayCustomOne = null;
arTempId.clear();
arTempId = null;
chickinlist.clear();
chickinlist = null;
arrCheckedItems.clear();
arrCheckedItems = null;
arrUnCheckedItems.clear();
arrUnCheckedItems = null;
}
}
}
我只是想立即更改选中项目的背景，而无需再次更新列表。
只是关于您的适配器的一般性意见。我建议你阅读一些关于适配器和适配器最佳实践的内容，因为你当然会错过一些东西。 （例如持有者模式，查看回收，您正在创建一个新的ClickListener等等） – Budius