Android 2.3.3，MinSDK = 8
我有一个ListView，每行有CustomView（带有一个Image，两个textviews和一个复选框）。我有一个名为添加联系人的按钮。单击此按钮，我会检查是否选中了复选框。如果选中，我必须获取图像的值，以及两个textview并存储在数据库中。
我知道ListView的CustomView是如何工作的。视图在显示时创建。那么，如何获取所有已检查的行？
这是XML布局:::
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_margin="2dp"
android:orientation="horizontal" >
<ImageView
android:id="@+id/imgView_addcontact"
android:layout_width="0dip"
android:layout_height="100dp"
android:layout_weight="0.20"
android:padding="5dp"
android:src="@drawable/addcontactsmall2" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="100dp"
android:layout_gravity="center"
android:layout_weight="0.60"
android:orientation="vertical"
android:padding="5dp" >
<TextView
android:id="@+id/txtView_addcontact_contactname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Contact Name"
android:textSize="20sp" />
<TextView
android:id="@+id/txtview_addcontact_phonenumber"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Phone Number"
android:textSize="16sp" />
</LinearLayout>
<CheckBox
android:id="@+id/chbk_addcontact"
android:layout_width="0dp"
android:layout_height="100dp"
android:layout_weight="0.10"
android:layout_gravity="center"
android:padding="5dp" />
</LinearLayout>
这是我正在尝试的代码 - 虽然我知道，它不起作用:::
for(int i = 0; i< lv_addcontacts.getCount(); i++)
{
View contactView = lv_addcontacts.getChildAt(i);
CheckBox contactView_chbk = (CheckBox) contactView.findViewById(R.id.chbk_addcontact);
TextView contactView_txt_contactname = (TextView) contactView.findViewById(R.id.txtView_addcontact_contactname);
TextView contactView_txt_phonenumber = (TextView) contactView.findViewById(R.id.txtview_addcontact_phonenumber);
if(contactView_chbk.isChecked())
{
System.out.println("Contact Name = " + contactView_txt_contactname.getText().toString());
System.out.println("Phone Number = " + contactView_txt_phonenumber.getText().toString());
System.out.println("CheckBox Status = Checked");
System.out.println("");
}
else
{
System.out.println("Contact Name = " + contactView_txt_contactname.getText().toString());
System.out.println("Phone Number = " + contactView_txt_phonenumber.getText().toString());
System.out.println("CheckBox Status = Not Checked");
System.out.println("");
}
}
我得到的例外:::
// OutPut
04-08 12:28:47.539: I/System.out(3244): Contact Name = Self Help
04-08 12:28:47.539: I/System.out(3244): Phone Number = *111#
04-08 12:28:47.539: I/System.out(3244): CheckBox Status = Not Checked
04-08 12:28:47.539: I/System.out(3244): Contact Name = Bonus Cards
04-08 12:28:47.539: I/System.out(3244): Phone Number = *444#
04-08 12:28:47.539: I/System.out(3244): CheckBox Status = Checked
04-08 12:28:47.539: I/System.out(3244): Contact Name = Annaya
04-08 12:28:47.539: I/System.out(3244): Phone Number = +1xxxx
04-08 12:28:47.539: I/System.out(3244): CheckBox Status = Not Checked
//例外
04-08 12:28:47.539: W/dalvikvm(3244): threadid=1: thread exiting with uncaught exception (group=0x401be560)
04-08 12:28:47.539: E/AndroidRuntime(3244): FATAL EXCEPTION: main
04-08 12:28:47.539: E/AndroidRuntime(3244): java.lang.NullPointerException
04-08 12:28:47.539: E/AndroidRuntime(3244): at com.xxx.xx.Class_Add_Contact.onClick(Class_Add_Contact.java:277)
04-08 12:28:47.539: E/AndroidRuntime(3244): at android.view.View.performClick(View.java:2485)
04-08 12:28:47.539: E/AndroidRuntime(3244): at android.view.View$PerformClick.run(View.java:9080)
04-08 12:28:47.539: E/AndroidRuntime(3244): at android.os.Handler.handleCallback(Handler.java:587)
04-08 12:28:47.539: E/AndroidRuntime(3244): at android.os.Handler.dispatchMessage(Handler.java:92)
04-08 12:28:47.539: E/AndroidRuntime(3244): at android.os.Looper.loop(Looper.java:130)
04-08 12:28:47.539: E/AndroidRuntime(3244): at android.app.ActivityThread.main(ActivityThread.java:3687)
04-08 12:28:47.539: E/AndroidRuntime(3244): at java.lang.reflect.Method.invokeNative(Native Method)
04-08 12:28:47.539: E/AndroidRuntime(3244): at java.lang.reflect.Method.invoke(Method.java:507)
04-08 12:28:47.539: E/AndroidRuntime(3244): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:878)
04-08 12:28:47.539: E/AndroidRuntime(3244): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:636)
04-08 12:28:47.539: E/AndroidRuntime(3244): at dalvik.system.NativeStart.main(Native Method)
异常即将发生，因为尚未创建视图。但是，如何在整个列表中获取选中的值。
编辑:::
如果我选择在onCheckedChange（）方法中为复选框实现onCheckedChange（），如何获取当前复选复选框的ListView项？
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
if(isChecked)
{
// How do I get the View(CustomView of ListView) to access the textViews and ImageView?
}
}
答案 0 :(得分：1)
使用您想要存储的值的getter setter创建这样的内部类
class CommonCategory {
private String nameofFriend;
private boolean isChecked;
public void setName(String nameofFriend) {
this.nameofFriend = nameofFriend;
}
public String getName() {
return nameofFriend;
}
public void setChecked(boolean isChecked) {
this.isChecked = isChecked;
}
public boolean isChecked() {
return isChecked;
}
}
获取您希望在列表视图中显示的列表
final ArrayList<CommonCategory> commonFriends = new ArrayList<CommonCategory>();
for (FriendsDataClass friendsDataClass : XMPPConn.mfriendList) {
String usernameEmail = friendsDataClass.friendName;
String username = usernameEmail.substring(0,
usernameEmail.indexOf("@"));
CommonCategory commoncontacts = new CommonCategory();
commoncontacts.setUsernameEmail(usernameEmail);
commoncontacts.setName(username);
commoncontacts.setChecked(false);
commonFriends.add(commoncontacts);
}
在getView本身的onCompoundButton中设置你的复选框值，并设置为getter setter。这样你就可以轻松完成。
由于