动态列表视图与编辑文本Android

Question

我的Android应用程序中有一个ListView，它使用CustomAdapterClass。ListView中填充的行每行包含2个编辑文本。这很好，我遇到的问题是ListView是动态的，也就是说，我添加了一个按钮，通过调用notifyDataSetChanged((将其附加到新行上；然而，这清除了整个列表。

当添加新行时，如何保留已输入EditText的文本？以下代码：

Activity.xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res 
/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent" android:layout_height="match_parent">

<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:descendantFocusability="afterDescendants"
android:id="@+id/listViewAddPeople">
</ListView>

<android.support.design.widget.FloatingActionButton
android:id="@+id/fabAddPerson"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:src="@mipmap/ic_launcher"
app:backgroundTint="#FFFFFF"
android:elevation="6dp"
/>

</RelativeLayout>

行.xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res
/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/personNameEditText"
android:hint="Enter Persons Full Name"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/personPhoneNoEditText"
android:layout_below="@+id/personNameEditText"
android:hint="Enter Phone No. (Optional)"/>
</RelativeLayout>

Java类：

public class AddPeopleNewProcedureActivity extends AppCompatActivity {
private ListView addPeopleListView;
private CustomAdapterClass customAdapter;
private FloatingActionButton fab;
private int lineCount;
private EditText personsNameET;
private EditText personsPhoneET;
private List<String> personsName;
private List<String> personsPhone;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.addpeoplenew_activity);
setupActivityReferences();
inflateListView();
setupClickListeners();
}
private void setupClickListeners() {
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
lineCount = lineCount +1;
personsName.clear();
personsPhone.clear();
customAdapter.notifyDataSetChanged();
}
});
}
private void inflateListView() {
customAdapter = new CustomAdapterClass();
addPeopleListView.setAdapter(customAdapter);
}
private void setupActivityReferences() {
addPeopleListView = (ListView) findViewById(R.id.listViewAddPeople);
fab = findViewById(R.id.fabAddPerson);
personsNameET = (EditText) findViewById(R.id.personNameEditText);
personsPhoneET = (EditText) findViewById(R.id.personPhoneNoEditText);
lineCount = 1;
}
public class CustomAdapterClass extends BaseAdapter {
@Override
public int getCount() {
return lineCount;
}
@Override
public Object getItem(int i) {
return null;
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
view =                
getLayoutInflater().inflate(R.layout.row_addpersonnew,null); 
final int rowClicked = i;
return view;
}
}
}

感谢您的帮助！

Answer 1

我添加了一个按钮，它将通过调用notifyDataSetChanged((；

当有人单击该按钮时，我看不到任何附加操作。我看到您清除了两个列表、personsName和personsPhone，然后通知适配器这些列表为空。

在onClick()中写下真正想做的事情。