关于android：在自定义列表视图中查找复选框的”已检查”状态

Finding the Checked state of checkbox in a custom listview

Hai我正在尝试开发一个应用程序，通过该应用程序，我可以向特定人群发送短信和电子邮件。

我有一个列表视图，显示了我组中的联系人。每一行的格式为

TextView(名称)TextView(电话)复选框(sms)
TextView(电子邮件ID)复选框(邮件)

我已使用自定义适配器将联系人详细信息显示到listview。我已设置onitemclick侦听器以查找行的位置。
我必须将短信和电子邮件发送到已将其复选框设置为true的那些联系人。我如何才能找到每个复选框的状态。

请提前帮助我。

我已在我创建的自定义adapetr下添加了..

公共类ContactInfoAdapter扩展了ArrayAdapter {

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private ArrayList<Boolean> mChecked_sms,mChecked_email;

Context context;
int layoutResourceId;
ContactInfo data[] = null;

public ContactInfoAdapter(Context context, int layoutResourceId, ContactInfo[] data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
mChecked_sms = new ArrayList<Boolean>();
mChecked_email = new ArrayList<Boolean>();
for (int i = 0; i < this.getCount(); i++) {
mChecked_sms.add(i, false);
mChecked_email.add(i,false);
}

}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ContactHolder holder;
View row = convertView;

if(row == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);

holder = new ContactHolder();

holder.txtName = (TextView)row.findViewById(R.id.textViewName);
holder.txtPhone = (TextView) row.findViewById(R.id.textViewPhone);
holder.txtEmail = (TextView) row.findViewById(R.id.textViewEmail);
holder.cb_sms_state = (CheckBox) row.findViewById(R.id.checkBox1);
holder.cb_email_state = (CheckBox) row.findViewById(R.id.checkBox2);
row.setTag(holder);
}
else
{
holder = (ContactHolder)row.getTag();
}

ContactInfo contact = data[position];
holder.txtName.setText(contact.name);
holder.cb_sms_state.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (holder.cb_sms_state.isChecked()) {
mChecked_sms.set(position, true);
Toast.makeText(getContext(),"checked", 2).show();
} else {
mChecked_sms.set(position, false);
}
}

});
holder.cb_sms_state.setChecked(mChecked_sms.get(position));

holder.cb_email_state.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (holder.cb_email_state.isChecked()) {
mChecked_email.set(position, true);
Toast.makeText(getContext(),"checked", 2).show();
} else {
mChecked_email.set(position, false);
}
}

});
holder.cb_email_state.setChecked(mChecked_email.get(position));

holder.txtPhone.setText(contact.number);
holder.txtEmail.setText(contact.email);

return row;
}
static class ContactHolder
{

TextView txtName;
TextView txtPhone;
TextView txtEmail;
CheckBox cb_sms_state;
CheckBox cb_email_state;
}

} ??

ContactInfo类为：

公共类ContactInfo {

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public String name;
public String number;
public String email;
public boolean sms_state;
public boolean email_state;
public ContactInfo(){
super();
}

public ContactInfo(String name,String number,String email,boolean sms_state,boolean email_state) {
super();

this.name = name;
this.number = number;
this.email = email;
this.sms_state = sms_state;
this.email_state = email_state;
}
public void setName(String name) {
this.name = name;
}

public String getName() {
return name;
}

public void setNUmber(String number) {
this.number = number;
}

public String getNumber() {
return number;
}

public void setEmail(String email) {
this.email = email;
}

public String getEmail() {
return email;
}
public void setSms_state(Boolean sms_state)
{
this.sms_state = sms_state;
}
public Boolean getSms_state(){
return sms_state;
}
public void setEmail_state(Boolean email_state)
{
this.email_state = email_state;
}
public Boolean getEmail_state(){
return email_state;
}

相关讨论

在getView()方法内，您必须为CheckBox实现OnCheckedChangeListener。

这是一个侦听器代码，例如：

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ChkBx.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
if ( isChecked )
{
// perform logic
}

}
});

相关讨论

由于ListView视图被回收，因此您不能依靠侦听特定实例，而必须在数据模型中存储"已检查"状态。您还将需要自定义列表适配器，您可以在其中创建和填充各个条目。必须执行以下操作：
-在重写的getView()中，创建新视图(如果未提供convertView)或膨胀新视图
-从您的数据模型填充viewv字段
-删除旧的onclick侦听器，并设置一个新的(可以是匿名内部类)来修改您的数据模型

PS：如果您的列表很大，则回收视图非常重要

相关讨论

我的应用程序Hasta La Vista遇到了这个问题，我创建了一个带有自定义列表视图的已选中项目，并且我需要获取已选中项目，这是解决方案：

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ListView lv = getListView(); //ver listview
if(lv != null){
final SparseBooleanArray checkedItems = lv.getCheckedItemPositions(); //get checked items
if (checkedItems == null) {
return;
}

final int checkedItemsCount = checkedItems.size();
for (int i = 0; i < checkedItemsCount; ++i) {
// This tells us the item position we are looking at
final int position = checkedItems.keyAt(i);
// This tells us the item status at the above position
final boolean isChecked = checkedItems.valueAt(i);

if(isChecked){
//get item from list and do something
lv.getAdapter().getItem(position);

}
}

}

这是一个简单的示例：

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mContactListView.setOnItemClickListener(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView< ? > parent, View view, int position, long arg3) {

CheckBox chkContact = (CheckBox) view.findViewById(R.id.listrow_contact_chkContact);
if (chkContact.isChecked()) {
...
}
});

相关讨论

参阅文档。

我认为您需要：

1	checkbox.isChecked()