我的应用程序中间有一个ListView，我在底部添加了一个透明的RelativeLayout，它包含一个TextView和一个按钮。在ListView中，每行都有一个复选框。我的问题是，我想在单击项目时使用列表中的已检查项目填充TextView。有没有办法做到这一点？ 这是我的布局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:text="@string/compare_information"
android:textColor="#8F8F8F"
android:textSize="20sp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:background="@android:color/transparent"
android:layout_marginBottom="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/informationText" />
<ListView
android:id="@+id/lvCompare"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:divider="@null"
android:layout_alignParentLeft="true"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_below="@+id/informationText">
</ListView>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="75dp"
android:layout_alignParentBottom="true"
android:background="#90303030" >
<TextView
android:id="@+id/checkedItems"
android:text="0 of 10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#EEEEEE"
android:textSize="14sp"
android:gravity="center_vertical|left"
/>
<Button
android:id="@+id/compare"
android:background="@drawable/filter_button_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical|right"
android:text="@string/compare"
android:textColor="#FFFFFF"
android:textSize="18sp"
/>
</RelativeLayout>
</RelativeLayout>
这是我的适配器：
public class CompareListAdapter extends ArrayAdapter<Restaurant>{
private ArrayList<Restaurant> list = new ArrayList<Restaurant>();
private Context context;
private static int checkBoxCounter = 0;
private static int checkBoxInitialized = 0;
private int layoutResourceId;
private TextView cCheckedItems;
private final String INFORMATION_TEXT = "Select six companies to compare";
public CompareListAdapter(Context context, int resource,
List<Restaurant> objects,TextView textViewToEdit ) {
super(context, resource, objects);
this.context = context;
this.layoutResourceId = resource;
checkBoxCounter = 0;
cCheckedItems = textViewToEdit;
// We put the strings from the array in to the hash map for storing
for (int i = 0; i < objects.size(); ++i) {
list.add(objects.get(i));
}
}
public View getView( final int position, View convertView, ViewGroup parent) {
View view = null;
if(convertView==null){
LayoutInflater inflater=(LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
view=inflater.inflate(layoutResourceId, parent, false);
final ViewHolder viewHolder = new ViewHolder();
viewHolder.cName =(TextView) view.findViewById(R.id.rest_name_textView1);
viewHolder.addres1 =(TextView) view.findViewById(R.id.address1_textView2);
viewHolder.addres2 =(TextView) view.findViewById(R.id.address2_textView3);
viewHolder.openingTime =(TextView) view.findViewById(R.id.opening_hour_textView4);
viewHolder.distance =(TextView) view.findViewById(R.id.distance_user_textView5);
viewHolder.openImage =(ImageView)view.findViewById(R.id.clock_imageView2);
viewHolder.checkBox = (CheckBox) view.findViewById(R.id.checkBox1);
viewHolder.cbBackground = (RelativeLayout) view.findViewById(R.id.checkbox_layout);
viewHolder.rating = (RatingBar) view.findViewById(R.id.restaurant_ratingBar1);
viewHolder.checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked && checkBoxCounter>=2){
list.get(position).setChecked(false);
viewHolder.checkBox.setChecked(false);
viewHolder.cbBackground.setBackgroundResource(R.drawable.checkbox_background);
}else {
Restaurant element = (Restaurant) viewHolder.checkBox.getTag();
element.setChecked(buttonView.isChecked());
if (isChecked) {
viewHolder.cbBackground.setBackgroundResource(R.drawable.checkbox_background_checked);
checkBoxCounter++;
} else {
viewHolder.cbBackground.setBackgroundResource(R.drawable.checkbox_background);
checkBoxCounter--;
}
}
Log.d("MYLOG INSIDE getView", String.valueOf(cCheckedItems));
cCheckedItems.setText(checkBoxCounter + " of 6");
Toast.makeText(context, "there are " + checkBoxCounter + " items selected", Toast.LENGTH_LONG).show();}});
}});
view.setTag(viewHolder);
viewHolder.checkBox.setTag(list.get(position));
}else{
view = convertView;
((ViewHolder) view.getTag()).checkBox.setTag(list.get(position));
}
ViewHolder viewHolder = (ViewHolder) view.getTag();
Restaurant obj=list.get(position);
viewHolder.rating.setRating((float) obj.getRating());
viewHolder.cName.setText(obj.getRestaurantName());
viewHolder.addres1.setText(obj.getAddress1());
viewHolder.addres2.setText(obj.getAddress2());
viewHolder.openingTime.setText(obj.getDayOfWeek()+" "+obj.getOpeningHour());
viewHolder.distance.setText(obj.getDistance());
viewHolder.checkBox.setChecked(obj.isChecked());
if(obj.isChecked()) {
viewHolder.cbBackground.setBackgroundResource(R.drawable.checkbox_background_checked);
}else{
viewHolder.cbBackground.setBackgroundResource(R.drawable.checkbox_background);
}
boolean isOpen=checkForOpen(obj.getDayOfWeek(),obj.getOpeningHour());
if(isOpen)
viewHolder.openImage.setImageResource(R.drawable.opened_logo);
else viewHolder.openImage.setImageResource(R.drawable.closed_logo);
return view;
}
private boolean checkForOpen(String weekDay,String openingTimeRange) {
Calendar cal = Calendar.getInstance();
int currentMinute=cal.get(Calendar.HOUR_OF_DAY)*60+cal.get(Calendar.MINUTE);;//today.MINUTE;
int dayNo=cal.get(Calendar.DAY_OF_WEEK);
String []timeRange=openingTimeRange.split("-");
int openingMn=Integer.parseInt(timeRange[0].substring(0,2))*60+Integer.parseInt(timeRange[0].substring(3,5));
int closingMn=Integer.parseInt(timeRange[1].substring(0,2))*60+Integer.parseInt(timeRange[1].substring(3,5));
if(weekDay.equals(getDayOfWeekFromDayNo(dayNo))&& currentMinute>=openingMn &¤tMinute<=closingMn)
return true;
return false;
}
public String getDayOfWeekFromDayNo(int dayNo)
{
String dayName="";
switch (dayNo) {
case 1:
dayName="SUNDAY";
break;
case 2:
dayName="MONDAY";
break;
case 3:
dayName="TUESDAY";
break;
case 4:
dayName="WEDNESDAY";
break;
case 5:
dayName="THURSDAY";
break;
case 6:
dayName="FRIDAY";
break;
case 7:
dayName="SATERDAY";
break;
default:
break;
}
return dayName;
}
static class ViewHolder{
RatingBar rating;
CheckBox checkBox;
RelativeLayout cbBackground;
TextView cName, addres1, addres2, openingTime, distance;
ImageView openImage;
}
}
更新：搞定了。添加了我现在在IDE上工作的内容。我在构造函数中创建了TextView要求，并将TextView保存在适配器中，然后在需要时调用它。如果TextView存在，则设置日志以进行测试。感谢@SagarPilkhwal指导解决方案。
答案 0 :(得分：0)
private TextView cCheckedItems;
....
cCheckedItems =(TextView) view.findViewById(R.id.checkedItems);
....
viewHolder.checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked && checkBoxCounter>=2){
list.get(position).setChecked(false);
viewHolder.checkBox.setChecked(false);
viewHolder.cbBackground.setBackgroundResource(R.drawable.checkbox_background);
}else {
Restaurant element = (Restaurant) viewHolder.checkBox.getTag();
element.setChecked(buttonView.isChecked());
if (isChecked) {
viewHolder.cbBackground.setBackgroundResource(R.drawable.checkbox_background_checked);
checkBoxCounter++;
} else {
viewHolder.cbBackground.setBackgroundResource(R.drawable.checkbox_background);
checkBoxCounter--;
}
cCheckedItems.setText(checkBoxCounter); //<-- ADD THIS
Toast.makeText(context, "there are " + checkBoxCounter + " items selected", Toast.LENGTH_LONG).show();
}}});