如何在扩展列表视图项中获取复选框的ID？
我有一个扩展列表视图，在父节点和子项中都有复选框。 所有数据都来自Web服务，因此它的动态。
附图：
现在在菜单项上单击我想获取所有复选框状态。 请指导我如何获得其中使用的复选框的ID。
附加代码：
/**
*
*/
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();
}
}
}
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(){
}
}
Child.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此进行操作基础。
编辑：我尝试了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resion为什么不保存状态。 我正面临与Strange behaviour in Expandablelistview - Android相同的问题 Plz指南
4 个答案:
答案 0 :(得分：1)
实际上，在运行时复制的列表或网格上添加的控件具有与设计时声明的ID相同的ID
例如：在你的情况下，这些是childname，rgb，check1
所以，如果你需要知道哪个复选框唯一 你应该逐个使用for循环
如果你想做一些事情为什么不这样做
复选框点击事件
public void onClickevent(View v)
{
private CheckBox ch = (CheckBox) findViewById(v.getId());
if (ch.IsChecked){
//do some thing
}
}
<TextView
android:id="@+id/txtComp1_ID"
android:layout_width="0sp"
android:layout_height="40sp"
android:textSize="1pt" >
</TextView>
因为它的宽度为零，所以它不可见，但它包含该行的id
现在为列表视图中的所有项目运行for循环
findview你复选框，然后找到它的父，然后再次查找它的子（文本视图）这个id字段 所以现在你有id和复选框检查状态为previous 这样你就可以得到这个
参见示例
v = (LinearLayout) findViewById(R.id.LinearNotebookList);
TextView _id, ID, Name;
for (int i = 0; i < nCount; i++) {
v = (LinearLayout) NotebookList.getAdapter().getView(i, null,
null);
_id = (TextView) v.findViewById(R.id.txt_Notebook_ID);
Available = (CheckBox) v
.findViewById(R.id.chkboxNotebookAvailable);
Display = (CheckBox) v.findViewById(R.id.chkboxNotebookDisplay);
Demo = (CheckBox) v.findViewById(R.id.chkboxNotebookDemo);
str_id = (String) _id.getText();
if (Available.isChecked()) {
strAvailable = "YES";
} else {
strAvailable = "NO";
}
if (Display.isChecked()) {
strDisplay = "YES";
} else {
strDisplay = "NO";
}
if (Demo.isChecked()) {
strDemo = "YES";
} else {
strDemo = "NO";
}
}
您可以根据需要进行更改
答案 1 :(得分：1)
只需使用setTag（int）和getTag（）方法设置id并获取控件的id。像EditText，复选框等
答案 2 :(得分：1)
使用
cb.setId(groupPosition+childPosition);
设置ID并检索使用：
cb.getId();
小组位置+小孩位置会为您提供该项目的确切位置。
在onClick中，您可以在创建复选框时获取您设置的ID。
答案 3 :(得分：1)
终于解决了我的问题。 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 ) {
AndroidClientEntity.objHasmap.clear();
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 );
Log.e("hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii",c);
TextView label = (TextView)v.findViewById( R.id.childname );
if( label != null )
label.setText( c );
CheckBox cb = (CheckBox)v.findViewById( R.id.check1);
//cb.setId(childPosition);
cb.setTag(groupPosition+"child"+childPosition);
cb.setChecked(false);
if(AndroidClientEntity.objHasmap.get(groupPosition+"child"+childPosition)!=null)
{
cb.setChecked(AndroidClientEntity.objHasmap.get(groupPosition+"child"+childPosition));
}
// 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.setTag(groupPosition+"cbgroup");
//Object_SecurityActivityobjHasmap.put(groupPosition+"cbgroup", false);
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(){
}
}
活动类：
public class Object_SecurityActivity extends ExpandableListActivity implements OnClickListener{
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
CheckBox cb=(CheckBox) v.findViewWithTag(groupPosition+"child"+childPosition);
//Boolean state=objHasmap.get(groupPosition+"child"+childPosition);
cb.toggle();
if(cb.isChecked())
{
AndroidClientEntity.objHasmap.put(groupPosition+"child"+childPosition,true );
}else
{AndroidClientEntity.objHasmap.remove(groupPosition+"child"+childPosition);
}
//add value in set
//cb.setEnabled(state);
return super.onChildClick(parent, v, groupPosition, childPosition, id);
}
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);
}
public boolean onCreateOptionsMenu(Menu menu) {
new MenuInflater(getApplication()).inflate(R.menu.context_menu_security,
menu);
return (super.onPrepareOptionsMenu(menu));
}
public boolean onOptionsItemSelected(MenuItem item) {
// startDownload();
if (item.getItemId() == R.id.setsecurity) {
//code here
Log.e("hiiiiiiiiiiiiiiii","scejkkl yu menu pressed");
}
return (super.onOptionsItemSelected(item));
}
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();
}
}
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
感谢pallavi，amit rai和Photon。
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