我有一个listlayout列表视图，其中包含autocompletextview和删除图标。主布局中有一个加btn和listview。当我们点击加号btn时，会动态地将新的rowlayout添加到listview。单击删除图标，我们可以删除该位置的rowlayout。 autocompletetextview显示了一些建议（我在listview适配器中使用了字符串数组和ArrayAdapter），当我选择其中任何一个建议时，它将设置为autocompletetextview。我的问题是每次我从listview添加/删除项目时，前一个autocompletetextview中显示的值被删除，以便它显示第一个字符串数组
// Row Layout
<?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="wrap_content"
android:gravity="center">
<AutoCompleteTextView
android:id="@+id/myEt"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="match_parent"/>
<ImageView
android:id="@+id/delImg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:src="@android:drawable/ic_delete"/>
</LinearLayout>public class MainActivity extends AppCompatActivity {
Button openBtn;
ArrayList<Model> listItems=new ArrayList<Model>();
ContactsListAdapter adapter;
int resource;
NonScrollListView list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
openBtn = (Button) findViewById(R.id.openBtn);
list = (NonScrollListView)findViewById(R.id.list);
adapter = new ContactsListAdapter(this, resource, listItems);
list.setAdapter(adapter);
openBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
addItems();
}
});
}
public void addItems() {
Model model = new Model();
model.setCount(listItems.size()+1);
listItems.add(model);
adapter.notifyDataSetChanged();
}
}public class ContactsListAdapter extends ArrayAdapter<Model> {
private Context mContext;
int resource;
private ArrayList<Model> arrayList = new ArrayList<Model>();
String[] fruits = {"Apple", "Banana", "Cherry", "Date", "Grape", "Kiwi", "Mango", "Pear"};
ArrayAdapter<String> adapter;
public ContactsListAdapter(Context mContext, int resource, ArrayList<Model> arrayList) {
super(mContext, resource, arrayList);
this.resource = resource;
this.mContext = mContext;
this.arrayList = arrayList;
adapter = new ArrayAdapter<String>(mContext, android.R.layout.select_dialog_item, fruits);
}
@Override
public int getCount() {
return super.getCount();
}
@NonNull
@Override
public View getView(final int position, View convertView, @NonNull final ViewGroup parent) {
View v = convertView;
final ViewHolder holder;
if (v == null) {
holder = new ViewHolder();
LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
v = inflater.inflate(R.layout.contact_item, parent, false);
holder.myEt = (AutoCompleteTextView)v.findViewById(R.id.myEt);
holder.delImg = (ImageView)v.findViewById(R.id.delImg);
v.setTag(holder);
} else {
holder = (ViewHolder) v.getTag();
}
holder.myEt.setThreshold(3);
holder.myEt.setAdapter(adapter);
final Model item = arrayList.get(position);
holder.myEt.setText(item.getName());
holder.myEt.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int pos, long id) {
arrayList.get(position).setName(fruits[pos]);
}
});
/*holder.myEt.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
*//*item.setName(s.toString());
notifyDataSetChanged();*//*
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
item.setName(s.toString());
//notifyDataSetChanged();
}
});*/
holder.delImg.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
arrayList.remove(position);
notifyDataSetChanged();
}
});
return v;
}
class ViewHolder {
AutoCompleteTextView myEt;
ImageView delImg;
}
}.
尝试在arrayList.size()方法中返回getCount()。
@Override
public int getCount() {
return arrayList.size();
}
class ViewHolder是Adapter的内部类，把它放在ContactsListAdapter类中
自从我得到解决后，我就分享了我的答案。我更改了AutoCompleteTextView的setOnItemClickListener（）方法。完整代码如下。
public class ContactsListAdapter extends ArrayAdapter<Model> {
private Context mContext;
int resource;
private ArrayList<Model> arrayList = new ArrayList<Model>();
String[] fruits = {"Apple", "Banana", "Cherry", "Date", "Grape", "Kiwi", "Mango", "Pear"};
ArrayAdapter<String> adapter;
public ContactsListAdapter(Context mContext, int resource, ArrayList<Model> arrayList) {
super(mContext, resource, arrayList);
this.resource = resource;
this.mContext = mContext;
this.arrayList = arrayList;
adapter = new ArrayAdapter<String>(mContext, android.R.layout.select_dialog_item, fruits);
}
@Nullable
@Override
public Model getItem(int position) {
return arrayList.get(position);
}
@Override
public int getCount() {
return arrayList.size();
}
@NonNull
@Override
public View getView(final int position, View convertView, @NonNull final ViewGroup parent) {
View v = convertView;
final ViewHolder holder;
if (v == null) {
holder = new ViewHolder();
LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
v = inflater.inflate(R.layout.contact_item, parent, false);
holder.myEt = (AutoCompleteTextView)v.findViewById(R.id.myEt);
holder.delImg = (ImageView)v.findViewById(R.id.delImg);
v.setTag(holder);
} else {
holder = (ViewHolder) v.getTag();
}
holder.myEt.setThreshold(3);
holder.myEt.setAdapter(adapter);
holder.myEt.setTag(position);
final Model item = arrayList.get(position);
holder.myEt.setText(item.getName());
System.out.println("sammy_name: "+item.getName() + " position: "+position);
holder.myEt.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int pos, long id) {
String value = parent.getAdapter().getItem(pos).toString();
Model model = getItem(position);
if (model != null) {
//model.setName(fruits[pos]);
model.setName(value);
}
System.out.println("sammy_name1: "+item.getName());
}
});
holder.delImg.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
arrayList.remove(position);
notifyDataSetChanged();
}
});
return v;
}
class ViewHolder {
ArrayAdapter<String> adapter;
AutoCompleteTextView myEt;
ImageView delImg;
}
}