无法在listview android中更改Edittext值
你好,朋友,下面是我的代码 Main.Java无法在listview android中更改Edittext值,android,listview,android-edittext,Android,Listview,Android Edittext,你好,朋友,下面是我的代码 Main.Java public class NewMain extends Activity { ListView mListView; DatabaseConnectionAPI mDatabaseConnectionAPI; ArrayList<ParserCategory> mArrayList; InteractiveListViewAdapter mInteractiveListViewAdapter; @Override protected
public class NewMain extends Activity {
ListView mListView;
DatabaseConnectionAPI mDatabaseConnectionAPI;
ArrayList<ParserCategory> mArrayList;
InteractiveListViewAdapter mInteractiveListViewAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDatabaseConnectionAPI = new DatabaseConnectionAPI(
getApplicationContext());
try {
mDatabaseConnectionAPI.createDataBase();
mDatabaseConnectionAPI.openDataBase();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mArrayList = new ArrayList<ParserCategory>();
mArrayList = mDatabaseConnectionAPI.getCategoryData();
mListView = (ListView) findViewById(R.id.MyList);
mInteractiveListViewAdapter=new InteractiveListViewAdapter(NewMain.this,R.layout.item,mArrayList);
mListView.setAdapter(mInteractiveListViewAdapter);
}
public class ViewHolder {
protected TextView text;
protected EditText scores;
}
public class InteractiveListViewAdapter extends ArrayAdapter<ParserCategory>
{
ArrayList<ParserCategory>mList;
Activity context;
public InteractiveListViewAdapter(Context context, int resource,ArrayList<ParserCategory> mArrayList) {
super(context, R.layout.item,mArrayList);
this.context=(Activity) context;
mList=mArrayList;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
View view = null;
if (convertView == null)
{
LayoutInflater inflator = getLayoutInflater();
view = inflator.inflate(R.layout.item, null);
final ViewHolder viewHolder = new ViewHolder();
viewHolder.text = (TextView) view.findViewById(R.id.txt);
viewHolder.scores=(EditText) view.findViewById(R.id.ItemCaption);
viewHolder.scores.addTextChangedListener(new TextWatcher()
{
public void onTextChanged(CharSequence s, int start, int before, int count) {
ParserCategory element=(ParserCategory)viewHolder.scores.getTag();
element.setCdesc(s.toString());
}
public void beforeTextChanged(CharSequence s, int start, int count,int after)
{
}
public void afterTextChanged(Editable s)
{
}
});
viewHolder.scores.setTag(mList.get(position));
view.setTag(viewHolder);
}
else
{
view = convertView;
((ViewHolder) view.getTag()).scores.setTag(mList.get(position));
}
ViewHolder holder = (ViewHolder) view.getTag();
holder.text.setText(mList.get(position).getCname());
holder.scores.setText(mList.get(position).getCdesc());
return view;
}
}
}
public类NewMain扩展活动{
列表视图;
数据库连接API mDatabaseConnectionAPI;
ArrayList婚姻列表;
InteractiveListViewAdapter MinterActivListViewAdapter;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
//TODO自动生成的方法存根
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDatabaseConnectionAPI=新数据库connectionapi(
getApplicationContext());
试一试{
mDatabaseConnectionAPI.createDataBase();
mDatabaseConnectionAPI.openDataBase();
}捕获(IOE异常){
//TODO自动生成的捕捉块
e、 printStackTrace();
}
mArrayList=newarraylist();
mArrayList=mDatabaseConnectionAPI.getCategoryData();
mListView=(ListView)findViewById(R.id.MyList);
mInteractiveListViewAdapter=新的InteractiveListViewAdapter(NewMain.this,R.layout.item,mArrayList);
setAdapter(minterActiviteListViewAdapter);
}
公共类视图持有者{
受保护的文本查看文本;
保护文本分数;
}
公共类InteractiveListViewAdapter扩展了ArrayAdapter
{
数组列表;
活动语境;
公共InteractiveListViewAdapter(上下文上下文、int资源、ArrayList mArrayList){
超级(上下文、右布局、项目、结婚名单);
this.context=(活动)上下文;
mList=结婚名单;
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图)
{
视图=空;
if(convertView==null)
{
LayoutFlater充气机=GetLayoutFlater();
视图=充气机充气(R.layout.item,空);
最终ViewHolder ViewHolder=新的ViewHolder();
viewHolder.text=(TextView)view.findViewById(R.id.txt);
viewHolder.scores=(EditText)view.findViewById(R.id.ItemCaption);
viewHolder.scores.addTextChangedListener(新的TextWatcher()
{
public void onTextChanged(字符序列,int start,int before,int count){
ParserCategory元素=(ParserCategory)viewHolder.scores.getTag();
setCdesc(s.toString());
}
更改前文本之前的公共void(字符序列s、int start、int count、int after)
{
}
公共无效后文本已更改(可编辑)
{
}
});
viewHolder.scores.setTag(mList.get(position));
view.setTag(viewHolder);
}
其他的
{
视图=转换视图;
((ViewHolder)view.getTag()).scores.setTag(mList.get(position));
}
ViewHolder=(ViewHolder)view.getTag();
holder.text.setText(mList.get(position.getCname());
holder.scores.setText(mList.get(position.getCdesc());
返回视图;
}
}
}
我的活动\u main.xml文件如下所示
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/MyList"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:cacheColorHint="@android:color/transparent"
android:fadingEdge="none" >
</ListView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<TextView
android:id="@+id/txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="dfd" />
<EditText
android:id="@+id/ItemCaption"
android:editable="true"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="2dip"
>
</EditText>
My item.xml文件如下所示
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/MyList"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:cacheColorHint="@android:color/transparent"
android:fadingEdge="none" >
</ListView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<TextView
android:id="@+id/txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="dfd" />
<EditText
android:id="@+id/ItemCaption"
android:editable="true"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="2dip"
>
</EditText>
运行上述代码时,我无法更改ListView
中的EditText
值。问题是,当我关注listitem中的任何EditText
时,我无法在EditText
上编写文本,所以我知道如何解决它吗?我解决了这个问题
我只是在getview
方法中对代码做了一行更改,我只添加了一行
viewHolder.scores.setId(position);
因为在onTextchangelistner
中,我使用getId
访问position,但在getview
中,我没有使用setid(position)
访问position,这就是为什么在ListView
中,没有设置特定的EditText
项目id,并且我无法更改文本
因此,我刚刚通过添加上述行进行了更改,它对我来说很好。listview的侦听器在哪里。?在
其他部分之后使用onTextChangeListener
。请告诉我在该位置写什么