我有一个 ExpandableListView 并在每个Parent Row中。
我有一个ToggleButton，当我打开一个切换按钮时，在滚动下面我正在打开多个toggleButton。为什么会发生这种情况，我在日志中正确地获得了groupPosition一切？
这是我的代码：
public class WifiAPListAdapter extends BaseExpandableListAdapter {
private WifiAPListActivity context;
public ArrayList<ExpandListGroup> groups;
private WifiManager wifiManager;
WifiStatus checkWifiStatus;
public ToggleButton togglebtn;
int pos;
Holder holder;
int previousPosition = -1;
private static final int CHILD_COUNT = 1;
public WifiAPListAdapter(WifiAPListActivity context,
ArrayList<ExpandListGroup> result) {
this.context = context;
this.groups = result;
wifiManager = (WifiManager) context
.getSystemService(Context.WIFI_SERVICE);
checkWifiStatus = new WifiStatus(context);
}
public Object getChild(int groupPosition, int childPosition) {
return groups.get(groupPosition);
}
public long getChildId(int groupPosition, int childPosition) {
return groupPosition;
}
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View view, ViewGroup parent) {
previousPosition = groupPosition;
ExpandListGroup child = (ExpandListGroup) getChild(groupPosition,
groupPosition);
// Log.i("", "getChildView: "+childPosition);
if (view == null) {
holder = new Holder();
LayoutInflater infalInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = infalInflater.inflate(R.layout.list_child_item, null);
holder.label_ssid = (TextView) view.findViewById(R.id.label_ssid);
holder.tv_ssid = (TextView) view.findViewById(R.id.tvssid);
holder.label_bssid = (TextView) view.findViewById(R.id.label_bssid);
holder.tv_bssid = (TextView) view.findViewById(R.id.tvbssid);
holder.label_capabilities = (TextView) view
.findViewById(R.id.label_capabilities);
holder.tv_capabilities = (TextView) view
.findViewById(R.id.tvcapabilities);
holder.label_signalStrength = (TextView) view
.findViewById(R.id.label_signalstrength);
holder.tv_signalStrength = (TextView) view
.findViewById(R.id.tvsignalstrength);
holder.wifi_signalimg = (ImageView) view.findViewById(R.id.signal);
view.setTag(holder);
} else {
holder = (Holder) view.getTag();
}
// *********************setting data to the child list**************
holder.tv_ssid.setText(child.getSSID());
holder.tv_bssid.setText(child.getBSSID());
holder.tv_capabilities.setText(child.getCapabilities());
holder.tv_signalStrength.setText(child.getData());
Bitmap bitmap = setSignalImage(Integer.parseInt(child.getData()));
holder.wifi_signalimg.setImageBitmap(bitmap);
return view;
}
public int getChildrenCount(int groupPosition) {
Log.i("", "getChildrenCount: " + groupPosition);
return CHILD_COUNT;
}
public Object getGroup(int groupPosition) {
return groups.get(groupPosition);
}
public int getGroupCount() {
Log.i("", "getGroupCount: " + groups.size());
return groups.size();
}
public long getGroupId(int groupPosition) {
return groupPosition;
}
public View getGroupView(int groupPosition, boolean isLastChild, View view,
ViewGroup parent) {
Log.i("", "getGroupView: " + groupPosition);
if (view == null) {
holder = new Holder();
LayoutInflater inf = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inf.inflate(R.layout.list_parent_items, null);
holder.tv_ssid = (TextView) view.findViewById(R.id.ssid);
holder.tv_bssid = (TextView) view.findViewById(R.id.bssid);
holder.btn_toggle = (ToggleButton) view.findViewById(R.id.togBtn);
// holder.btn_toggle.setTag(groups.get(groupPosition).getBSSID());
view.setTag(holder);
} else {
holder = (Holder) view.getTag();
}
// holder.btn_toggle.setTag(groups.get(groupPosition).getBSSID());
holder.tv_ssid.setText(groups.get(groupPosition).getSSID());
holder.tv_bssid.setText(groups.get(groupPosition).getBSSID());
return view;
}
public void toggle(View v) {
if (holder.btn_toggle.isChecked()) {
}
Log.i("", "toggle");
}
public boolean hasStableIds() {
return true;
}
public boolean isChildSelectable(int arg0, int arg1) {
return true;
}
任何身体都可以告诉一个好的方法来避免这个问题而不去除持有者，因为如果我有n个项目，那么每次我们应该使用持有者时绘制视图并不是一个好主意。
答案 0 :(得分：0)
删除持有者并关闭if循环如何关闭以及如何关闭也使用逻辑来切换getGroupView内部。因为每次你滚动listview getGroupView被调用所以每次这个方法必须检查条件。
private WifiAPListActivity context;
public ArrayList<ExpandListGroup> groups;
private WifiManager wifiManager;
WifiStatus checkWifiStatus;
public ToggleButton togglebtn;
int pos;
Holder holder;
int previousPosition = -1;
private static final int CHILD_COUNT = 1;
public WifiAPListAdapter(WifiAPListActivity context,
ArrayList<ExpandListGroup> result) {
this.context = context;
this.groups = result;
wifiManager = (WifiManager) context
.getSystemService(Context.WIFI_SERVICE);
checkWifiStatus = new WifiStatus(context);
}
public Object getChild(int groupPosition, int childPosition) {
return groups.get(groupPosition);
}
public long getChildId(int groupPosition, int childPosition) {
return groupPosition;
}
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View view, ViewGroup parent) {
previousPosition = groupPosition;
ExpandListGroup child = (ExpandListGroup) getChild(groupPosition,
groupPosition);
// Log.i("", "getChildView: "+childPosition);
if (view == null) {
holder = new Holder();
LayoutInflater infalInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = infalInflater.inflate(R.layout.list_child_item, null);
}
label_ssid = (TextView) view.findViewById(R.id.label_ssid);
tv_ssid = (TextView) view.findViewById(R.id.tvssid);
label_bssid = (TextView) view.findViewById(R.id.label_bssid);
tv_bssid = (TextView) view.findViewById(R.id.tvbssid);
label_capabilities = (TextView) view
.findViewById(R.id.label_capabilities);
tv_capabilities = (TextView) view
.findViewById(R.id.tvcapabilities);
label_signalStrength = (TextView) view
.findViewById(R.id.label_signalstrength);
tv_signalStrength = (TextView) view
.findViewById(R.id.tvsignalstrength);
wifi_signalimg = (ImageView) view.findViewById(R.id.signal);
// *********************setting data to the child list**************
tv_ssid.setText(child.getSSID());
tv_bssid.setText(child.getBSSID());
tv_capabilities.setText(child.getCapabilities());
tv_signalStrength.setText(child.getData());
Bitmap bitmap = setSignalImage(Integer.parseInt(child.getData()));
wifi_signalimg.setImageBitmap(bitmap);
return view;
}
public int getChildrenCount(int groupPosition) {
Log.i("", "getChildrenCount: " + groupPosition);
return CHILD_COUNT;
}
public Object getGroup(int groupPosition) {
return groups.get(groupPosition);
}
public int getGroupCount() {
Log.i("", "getGroupCount: " + groups.size());
return groups.size();
}
public long getGroupId(int groupPosition) {
return groupPosition;
}
public View getGroupView(int groupPosition, boolean isLastChild, View view,
ViewGroup parent) {
Log.i("", "getGroupView: " + groupPosition);
if (view == null) {
holder = new Holder();
LayoutInflater inf = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inf.inflate(R.layout.list_parent_items, null);
}
tv_ssid = (TextView) view.findViewById(R.id.ssid);
tv_bssid = (TextView) view.findViewById(R.id.bssid);
btn_toggle = (ToggleButton) view.findViewById(R.id.togBtn);
// holder.btn_toggle.setTag(groups.get(groupPosition).getBSSID());
// holder.btn_toggle.setTag(groups.get(groupPosition).getBSSID());
tv_ssid.setText(groups.get(groupPosition).getSSID());
tv_bssid.setText(groups.get(groupPosition).getBSSID());
return view;
}
public void toggle(View v) {
if (btn_toggle.isChecked()) {
}
Log.i("", "toggle");
}
public boolean hasStableIds() {
return true;
}
public boolean isChildSelectable(int arg0, int arg1) {
return true;
}
答案 1 :(得分：0)