我有两个类，第一个包含列表视图，第二个包含扩展数组适配器，我有一个文本视图和一个广播组（包含3个单选按钮），每个项目，所以我想控制检查哪个单选按钮如果选中具有文本“存在”的单选按钮，则每个项目都计数。
这是包含listView的类。
public class StartAttendance extends ListActivity implements View.OnClickListener {
private ListView listOfTakeAtt;
private DBManager dbManager;
private String studentSubjectId;
private Button save;
private Button cancel;
List<UserModel> students;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.start_attendance);
save=(Button)findViewById(R.id.save);
cancel=(Button) findViewById(R.id.cancel);
listOfTakeAtt=(ListView)findViewById(R.id.listOfTakingAttendance);
Intent intent=getIntent();
studentSubjectId=intent.getStringExtra("studentSubjectId");
dbManager=new DBManager(StartAttendance.this);
dbManager.open();
ArrayList arrayList1=dbManager.getAllStudentsId(Integer.valueOf(studentSubjectId));//Get the ids from the database.
ArrayList arrayList2=dbManager.getAllStudentsName(Integer.valueOf(studentSubjectId));//Get the names from database.
students=new ArrayList<>();
//Set all ids and names into userModel.
for(int i=0;i<arrayList1.size();i++){
students.add(new UserModel(false,(Integer)arrayList1.get(i), (String) arrayList2.get(i)));
}
CustomLayoutOfTakingAttendance adapter=new CustomLayoutOfTakingAttendance(StartAttendance.this,students);
listOfTakeAtt.setAdapter(adapter);
listOfTakeAtt.setDividerHeight(17);
cancel.setOnClickListener(this);
save.setOnClickListener(this);
listOfTakeAtt.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
}
});
}
@Override
public void onClick(View v){
switch (v.getId()){
//When save button is clicked i want to see present radioButton is checked or not for each item.
//if checked save current date into database for this id.
case R.id.save:
SimpleDateFormat DateFormat=new SimpleDateFormat("dd-MM-yyyy", Locale.getDefault());
Date d=new Date();
String date=DateFormat.format(d);
for(int i=0;i<students.size();i++)
{
UserModel model = students.get(i);
if(model.isSelected){
dbManager=new DBManager(StartAttendance.this);
dbManager.open();
dbManager.UpdateStudentDate(model.getStudentId(),date);
}
}
break;
case R.id.cancel:
break;
}
}
}
这是扩展BaseAdapter的类。
public class CustomLayoutOfTakingAttendance extends BaseAdapter{
Activity context;
DBManager dbManager;
List<UserModel> students;
LayoutInflater inflater;
public CustomLayoutOfTakingAttendance(Activity context,List<UserModel> students) {
this.context=context;
this.students=students;
inflater = context.getLayoutInflater();
}
@Override
public int getCount() {
return students.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
ViewHolder holder = null;
if (convertView == null){
convertView = inflater.inflate(R.layout.custom_layout_of_taking_attendance, parent, false);
holder = new ViewHolder();
holder.ID = (TextView) convertView.findViewById(R.id.id);
holder.NAME = (TextView) convertView.findViewById(R.id.stName);
holder.radioGroup = (RadioGroup) convertView.findViewById(R.id.radioGroup);
convertView.setTag(holder);
} else holder = (ViewHolder) convertView.getTag();
UserModel model = students.get(position);
int checkedRB=holder.radioGroup.getCheckedRadioButtonId();
if (checkedRB==R.id.present){
model.setSelected(true);
}
holder.ID.setText(model.getStudentId());
holder.NAME.setText(model.getStudentName());
return convertView;
}
class ViewHolder{
TextView ID;
TextView NAME;
RadioGroup radioGroup;
}
}
这是UserModel类
public class UserModel {
boolean isSelected;
int id;
String name;
public UserModel(boolean isSelected, int id,String name) {
this.isSelected = isSelected;
this.id = id;
this.name=name;
}
public boolean isSelected() {
return isSelected;
}
public void setSelected(boolean selected) {
isSelected = selected;
}
public int getStudentId() {
return id;
}
public void setStudentId(int id) {
this.id = id;
}
public String getStudentName() {
return name;
}
public void setStudentName(String name) {
this.name = name;
}
}
这是我对每个项目的布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/id"
android:layout_marginRight="50dp"
android:minWidth="50dp"
android:visibility="invisible"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/name"
android:layout_weight="1"
android:layout_marginBottom="15dp"
android:textSize="25dp"
android:textColor="#000"
android:layout_marginLeft="10dp"
/>
<RadioGroup
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:id="@+id/radioGroup"
android:orientation="horizontal"
android:layout_below="@id/name"
android:layout_marginBottom="20dp"
android:layout_marginLeft="10dp"
>
<RadioButton
android:text="PRESENT"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/present"
android:layout_weight="1"
android:background="@android:color/holo_green_light" />
<RadioButton
android:text="ABSENT"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/absent"
android:layout_weight="1"
android:background="@android:color/holo_red_dark" />
<RadioButton
android:text="ICAZE"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:id="@+id/icaze"
android:background="@android:color/holo_orange_light" />
</RadioGroup>
</RelativeLayout>
这是包含列表视图的布局。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#eee"
>
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/date"
android:id="@+id/listOfTakingAttendance"
android:background="@android:color/background_light" />
<Button
android:text="CANCEL"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginLeft="43dp"
android:layout_marginStart="43dp"
android:id="@+id/cancel"
style="@style/Widget.AppCompat.Button.Colored"
android:background="@android:color/holo_red_dark"
android:textSize="18dp"
android:fontFamily="sans-serif-condensed"
/>
<Button
android:text="SAVE"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/save"
android:layout_alignParentBottom="true"
android:layout_toRightOf="@+id/date"
android:layout_toEndOf="@+id/date"
android:layout_marginLeft="41dp"
android:layout_marginStart="41dp"
style="@style/Widget.AppCompat.Button.Colored"
android:background="@android:color/holo_green_light"
android:textSize="18dp"
android:fontFamily="sans-serif-condensed"
/>
</RelativeLayout>