【发布时间】：2012-04-11 07:46:49
【问题描述】：
我有一个扩展的列表视图，在父节点和子项中都有复选框。 所有数据都来自网络服务，因此它是动态的。
附上图片：
现在在菜单项上单击我想获取所有复选框状态。 请指导我如何获取其中使用的复选框的 ID。
附上代码：
/**
*
*/
public class Object_SecurityActivity extends ExpandableListActivity {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
return super.onChildClick(parent, v, groupPosition, childPosition, id);
}
@Override
public void onContentChanged() {
// TODO Auto-generated method stub
super.onContentChanged();
}
private AndroidClientEntity obj_android_client;
private static final String LOG_TAG = "ElistCBox2";
private String username, password, clientname;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
//setContentView(R.layout.main);
Intent security_intent = getIntent();
String id = security_intent.getStringExtra("id");
obj_android_client = (AndroidClientEntity) getApplicationContext();
username = obj_android_client.getUsername();
password = obj_android_client.getPassword();
clientname = obj_android_client.getClientName();
new Securityasync().execute(username, password, clientname, id);
}
class Securityasync extends AsyncTask<String, String, String> {
String sesurity_response = null;
ProgressDialog dialog;
private Expandable_list_Adapter expListAdapter;
@Override
protected String doInBackground(String... params) {
if ((isOnline(Object_SecurityActivity.this).equals("true"))) {
Security_service security_obj = new Security_service();
try {
sesurity_response = security_obj.getUsersRoles(params[0],
params[1], params[2], params[3]);
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(String result) {
if (isOnline(Object_SecurityActivity.this).equals("true")) {
setContentView(R.layout.layout_expandable_listview);
ArrayList<String> groupNames = new ArrayList<String>();
ArrayList<String> sub = new ArrayList<String>();
ArrayList<ArrayList<String>> child = new ArrayList<ArrayList<String>>();
ArrayList<String> sub_id = new ArrayList<String>();
ArrayList<String> objrid = new ArrayList<String>();
try {
JSONArray json = new JSONArray(sesurity_response);
// JSONArray json_child=new JSONArray(sesurity_response);
for (int i = 0; i < json.length(); i++) {
JSONObject json_obj = json.getJSONObject(i);
if (json_obj.getString("PRid").equalsIgnoreCase("0")) {
String ObjectRid = json_obj.getString("ObjectRid");
int m=0;
objrid.add(m,ObjectRid);
m++;
groupNames.add(json_obj.getString("Name"));
for (int j = 0; j < json.length(); j++) {
JSONObject json_child = json.getJSONObject(j);
if (ObjectRid.equalsIgnoreCase(json_child
.getString("PRid"))) {
int n=0;
sub_id.add(n,json_child.getString("ObjectRid"));
sub.add(json_child.getString("Name"));
}
}
child.add(sub);
}
}
expListAdapter = new Expandable_list_Adapter(getBaseContext(),
groupNames, child);
setListAdapter(expListAdapter);
Log.e("size in error", "son " + json.length());
} catch (JSONException e) {
Log.e("", "", e);
Toast.makeText(getBaseContext(), "parsing error",
Toast.LENGTH_LONG).show();
}
Log.e("sizeof list", ""+sub_id.size());
Iterator itr=objrid.iterator();
while(itr.hasNext()){
Log.e("id","value "+itr.next());
}
}
}
@Override
protected void onPreExecute() {
super.onPreExecute();
}
}
}
以及适配器类：
public class Expandable_list_Adapter extends BaseExpandableListAdapter implements OnCheckedChangeListener {
private Context context;
private ArrayList<String> groupNames;
private ArrayList<ArrayList<String>> child;
private LayoutInflater inflater;
public Expandable_list_Adapter(Context context,
ArrayList<String> groupNames,
ArrayList<ArrayList<String>> child ) {
this.context = context;
this.groupNames= groupNames;
this.child = child;
inflater = LayoutInflater.from( context );
}
public Object getChild(int groupPosition, int childPosition) {
return child.get( groupPosition ).get( childPosition );
}
public long getChildId(int groupPosition, int childPosition) {
return (long)( groupPosition*1024+childPosition ); // Max 1024 children per group
}
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
View v = null;
if( convertView != null )
v = convertView;
else
v = inflater.inflate(R.layout.child_row, parent, false);
String c = (String)getChild( groupPosition, childPosition );
TextView color = (TextView)v.findViewById( R.id.childname );
if( color != null )
color.setText( c );
CheckBox cb = (CheckBox)v.findViewById( R.id.check1 );
//cb.setChecked(false);
cb.setOnCheckedChangeListener(this);
return v;
}
public int getChildrenCount(int groupPosition) {
return child.get( groupPosition ).size();
}
public Object getGroup(int groupPosition) {
return groupNames.get( groupPosition );
}
public int getGroupCount(){
return groupNames.size();
}
public long getGroupId(int groupPosition) {
return (long)( groupPosition*1024 ); // To be consistent with getChildId
}
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
View v = null;
if( convertView != null )
v = convertView;
else
v = inflater.inflate(R.layout.group_row, parent, false);
String gt = (String)getGroup( groupPosition );
TextView colorGroup = (TextView)v.findViewById( R.id.childname );
if( gt != null )
colorGroup.setText( gt );
CheckBox cb = (CheckBox)v.findViewById( R.id.check2 );
cb.setChecked(false);
return v;
}
public boolean hasStableIds() {
return true;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
Log.e("is group checked","group "+groupPosition);
Log.e("selectable","has" +childPosition);
return true;
}
public void onGroupCollapsed (int groupPosition) {}
public void onGroupExpanded(int groupPosition) {}
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
}
public void isChecked(){
}
}
子.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:background="#21415A"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView android:id="@+id/childname"
android:paddingLeft="50px"
android:focusable="false"
android:textSize="14px"
android:textStyle="italic"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView android:id="@+id/rgb"
android:focusable="false"
android:textSize="14px"
android:textStyle="italic"
android:layout_width="100px"
android:layout_height="wrap_content"/>
<CheckBox
android:id="@+id/check1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:focusable="false" />
</RelativeLayout>
parent.xml 与 child.xml 相同。
请指导我如何获取复选框的 ID，因为在选择的菜单项上我必须对其进行操作基础知识。
编辑：我尝试 setTag() 和 getTag() 。但现在可扩展列表视图显示出奇怪的行为。当我选择一个复选框并展开另一个组时，所有 chekbok 框都设置为默认值。 在这种情况下我必须做什么。我不知道为什么它不保存状态。 我面临与Strange behaviour in Expandablelistview - Android相同的问题 请指导
【问题讨论】：