从arrayList类的适配器中获取listView值
从arrayList类的适配器中获取listView值
提问于 2016-06-13 06:54:37
如果单击复选框，我已经将一些值存储在数组中，但我很难从listView类获得它。我怎么能得到它。另外，如果我将clickListener放在包含复选框和textView的视图中，则复选框单击不起作用，但如果在textview中单击，则会工作。如何修复它。下面是我的密码。提前感谢
singlerow_compare.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:id="@+id/singleRow" android:gravity="center">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textViewCompare" />
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageViewCompare"/>
</RelativeLayout>listview xml：
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/listViewCompare" />
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Compare"
android:id="@+id/compare"
android:layout_alignParentBottom="true"/>ListView.java
listView = (HorizontalListView) findViewById(R.id.listViewCompare);
compareBtn = (Button) findViewById(R.id.compare);
listView.setAdapter(new CustomAdapter(this, nameList, imageList));
compareBtn.setOnClickListener(new View.OnClickListener()
{ @Override
public void onClick(View view) {
//I need to have addCheckBoxValue arraylist from adapter here
}
}CustomAdapter.java
public class CustomAdapter extends BaseAdapter {
ArrayList result;
Context context;
Drawable [] imageId;
protected ArrayList<String> addCheckBoxValue;
private static LayoutInflater inflater=null;
public CustomAdapter(CompareListView mainActivity, ArrayList nameList, Drawable[] imageList) {
result=nameList;
context=mainActivity;
imageId=imageList;
inflater = ( LayoutInflater )context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public class Holder
{
TextView tv;
ImageView img;
CheckBox checkBox;
}
@Override
public View getView(final int i, View view, ViewGroup viewGroup) {
addCheckBoxValue = new ArrayList();
final Holder holder=new Holder();
View rowView;
rowView = inflater.inflate(R.layout.singlerow_compare, null);
holder.tv=(TextView) rowView.findViewById(R.id.textViewCompare);
holder.checkBox = (CheckBox) rowView.findViewById(R.id.imageViewCompare);
holder.tv.setText(result.get(i).toString());
holder.checkBox.setButtonDrawable(imageId[i]);
final String selectedCbValue = holder.tv.getText().toString();
holder.checkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
boolean checked = ((CheckBox) view).isChecked();
if(checked){
if (!addCheckBoxValue.contains(selectedCbValue))
addCheckBoxValue.add(selectedCbValue);
}else{
if (addCheckBoxValue.contains(selectedCbValue))
addCheckBoxValue.remove(selectedCbValue);
}
}
});
rowView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//if i click on textView, it works but when i click on checkbox here, it doesnt work why?? So i have clicklistener in checkbox abov
}
});
return rowView;
}回答 2
Stack Overflow用户
回答已采纳
发布于 2016-06-13 07:04:45
在CustomAdapter类中创建以下方法：
public ArrayList<String> getCheckBoxValue(){
return addCheckBoxValue;
}在你的ListActivity里。更改您的活动代码如下：
private CustomAdapter listAdapter; // declare this before on create现在，在您的on create中设置适配器时，请编写以下代码：
listAdapter = new CustomAdapter(this, nameList, imageList)
// set Adapter like this:
listView.setAdapter(listAdapter);单击代码上的按钮应该如下所示：
compareBtn.setOnClickListener(new View.OnClickListener()
{ @Override
public void onClick(View view) {
//I need to have addCheckBoxValue arraylist from adapter here
listAdapter.getCheckBoxValue(); // do whatever you want to do here
}
}编码愉快！
Stack Overflow用户
发布于 2016-06-13 07:07:10
我建议您为复选框创建布尔数组，并以这样的方式维护它，这对我来说是有效的。
public class CustomAdapter extends BaseAdapter {
private final LayoutInflater inflater;
private final Context context;
private List<ModelPooja> listData;
public CustomAdapter(Context mainActivity, List<ModelPooja> listData) {
context = mainActivity;
this.listData = listData;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return listData.size();
}
@Override
public Object getItem(int position) {
return listData.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = inflater.inflate(R.layout.list_item_poojaselection, null);
holder.tv = (TextView) convertView.findViewById(R.id.list_item_poojaname);
holder.checks = (CheckBox) convertView.findViewById(R.id.list_item_poojacheck);
convertView.setTag(holder);
}else {
holder = (ViewHolder) convertView.getTag();
}
holder.checks.setOnCheckedChangeListener(null);
holder.checks.setFocusable(false);
if (listData.get(position).isselected) {
holder.checks.setChecked(true);
} else {
holder.checks.setChecked(false);
}
holder.checks.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton cb, boolean b) {
if (checkMaxLimit()) {
if (listData.get(position).isselected && b) {
holder.checks.setChecked(false);
listData.get(position).isselected = false;
} else {
holder.checks.setChecked(false);
listData.get(position).isselected = false;
Toast.makeText(context, "Max limit reached", Toast.LENGTH_SHORT).show();
}
} else {
if (b) {
listData.get(position).isselected = true;
} else {
listData.get(position).isselected = false;
}
}
}
});
holder.tv.setText(listData.get(position).getPOOJA_LISTING_NAME());
return convertView;
}
public boolean checkMaxLimit() {
int countermax = 0;
for(ModelPooja item : listData){
if(item.isselected){
countermax++;
}
}
return countermax >= 5;
}
public class ViewHolder {
TextView tv;
public CheckBox checks;
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/37783456
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