[英]TextView inside a ListView: setTextHighlightColor() issue
[英]Issue when changing the text of textview inside listview
我是这个Android开发的新手,在设置listview内的textview文本时遇到问题。
问题:
====================
模型
====================
颜色
====================
样式
====================
使
====================
当我在列表视图中单击“模型”视图时。 下面显示
====================
丰田汽车
====================
美洲虎
====================
本田
====================
苏布鲁
====================
====================
模型
====================
颜色--------------丰田
====================
样式
====================
使
====================
====================
型号--------------丰田
====================
颜色
====================
样式
====================
使
====================
这里是最初的活动。 当我在列表视图中单击“模型”时,将显示另一个活动以及汽车模型列表。 (使用startactivtiyforresult()调用新活动)
在第二个活动中,当我单击任何模型名称时,它将关闭当前活动并将所选模型名称传递给第一个活动。 该模型名称在OnActivityResult方法中设置为textview
我的CustomAdapter
class CustomAdapter extends ArrayAdapter<String> {
Context context;
String[] titles;
public CustomAdapter(Context context, String[] titles) {
super(context, R.layout.dashboard_row_layout, R.id.row_textview, titles);
this.context = context;
this.titles = titles;
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
View row = convertView;
ViewHolder holder;
if(row==null)
{
LayoutInflater inflater = (LayoutInflater)context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.dashboard_row_layout, parent, false);
holder = new ViewHolder(row);
row.setTag(holder);
}
//((TextView)row.findViewById(R.id.row_textview)).setText(titles[position]);
else
{
holder = (ViewHolder)row.getTag();
}
holder.textview.setText(titles[position].toString());
return row;
}
}
class ViewHolder
{
TextView textview;
ViewHolder(View v)
{
textview = (TextView) v.findViewById(R.id.row_textview);
}
}
OnActivityResultMethod
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (resultCode)
{
case Activity.RESULT_OK:
//selectedModel = data.getStringExtra("response");
setDateTextView.setText(data.getStringExtra("response"));
}
}
片段的OnCreateView
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_vehicle_information, container, false);
SeparatedListAdapter adapter = new SeparatedListAdapter(this.getActivity());
adapter.addSection("Plate Information", new CustomAdapter(this.getActivity(),getResources().getStringArray(R.array.plateInformationArrayList)));
adapter.addSection("Vehicle Information", new CustomAdapter(this.getActivity(),getResources().getStringArray(R.array.vehicleInformationArrayList)));
((ListView)rootView.findViewById(R.id.veh_information_listView)).setAdapter(adapter);
//Click Listener for listview with custom view
((ListView)rootView.findViewById(R.id.veh_information_listView)).setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(((TextView)view.findViewById(R.id.row_textview)).getText().toString().equalsIgnoreCase("Expiration")){
DateDialog dialog = new DateDialog(getActivity(), (TextView)view.findViewById(R.id.statename_textView));
dialog.returnDateDialog().show();
}
else if(((TextView)view.findViewById(R.id.row_textview)).getText().toString().equalsIgnoreCase("Model")){
setDateTextView = (TextView)view.findViewById(R.id.statename_textView);
startActivityForResult(new Intent(getActivity(), VehicleInformationDetails.class), 1);
}
}
});
return rootView;
}
第二活动
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_searchable_listview, container, false);
ListView listview = (ListView)rootView.findViewById(R.id.searchable_listView);
MyAdapter adapter = new MyAdapter(context, array);
listview.setAdapter(adapter);
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
TextView textView = (TextView)view.findViewById(R.id.list_item_title);
Intent returnIntent = new Intent();
returnIntent.putExtra("response", textView.getText().toString());
getActivity().setResult(Activity.RESULT_OK, returnIntent);
getActivity().finish();
}
});
SetActionBarTitle(this.actionBarTitle);
return rootView;
}
希望这个解释对您有所帮助。 请帮我。
尝试直接从适配器外部更改列表项内部的文本视图的文本是不可靠的。 一方面,视图将与适配器的支持数据不匹配。 另外,您的适配器不会尝试清除辅助文本视图的任何现有内容,因此当列表视图回收其视图时,您将遇到许多诸如此类的异常问题。
因此,请删除所有引用setDateTextView
的行。 相反,您需要一个自定义类来表示列表项的所有可能数据,如下所示:
public class MyListItem {
public String title;
public String state;
public MyListItem(String title){
this(title, "");
}
public MyListItem(String title, String state){
this.title = title;
this.state = state;
}
}
然后将其用作自定义适配器的对象类型:
class CustomAdapter extends ArrayAdapter<MyListItem> {
public CustomAdapter(Context context, MyListItem[] listItems) {
super(context, R.layout.dashboard_row_layout, listItems);
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
View row = convertView;
ViewHolder holder;
if(row==null)
{
LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.dashboard_row_layout, parent, false);
holder = new ViewHolder(row);
row.setTag(holder);
}
else
{
holder = (ViewHolder)row.getTag();
}
holder.titleTextview.setText(getItem(position).title);
holder.stateTextview.setText(getItem(position).state);
return row;
}
}
class ViewHolder
{
TextView titleTextview;
TextView stateTextview;
ViewHolder(View v)
{
titleTextview= (TextView) v.findViewById(R.id.row_textview);
stateTextview= (TextView) v.findViewById(R.id.statename_textView);
}
}
最后,在onActivityResult()
,告诉适配器更改相应行的内容数组的值。 您必须将这些变量设置为成员变量,但需要这样做:
switch (resultCode)
{
case Activity.RESULT_OK:
mListAdapter.getItem(mModelItemPosition).state = data.getStringExtra("response");
mListAdapter.notifyDataSetChanged();
break;
}
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