我试图更改列表项单击中的行的图标但没有成功。我按照其他s / o问题得到的建议但结果没有成功。我尝试了类似
的方法
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
ImageView imageView = ((ImageView) view);
imageView.setImageResource(R.drawable.open);
imageView.invalidate();
但到目前为止没有任何工作。所以经过这么多天的研究后我真的不得不在这里发布。所以我们将非常感谢任何帮助，建议或推荐。
我的适配器：
public class ContactListAdapter extends BaseAdapter {
Context context;
ArrayList<ContactListItems> contactList;
public ContactListAdapter(Context context, ArrayList<ContactListItems> list) {
this.context = context;
contactList = list;
}
@Override
public int getCount() {
return contactList.size();
}
@Override
public Object getItem(int position) {
return contactList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup arg2) {
ContactListItems contactListItems = contactList.get(position);
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.contact_list_row, null);
}
TextView tvSlNo = (TextView) convertView.findViewById(R.id.tv_slno);
tvSlNo.setText(contactListItems.getId());
TextView tvName = (TextView) convertView.findViewById(R.id.tv_name);
tvName.setText(contactListItems.getName());
TextView tvPhone = (TextView) convertView.findViewById(R.id.tv_phone);
tvPhone.setText(contactListItems.getSalary());
return convertView;
}}
我填写listview的地方：
public class Inbox extends Fragment {
String ParsingDta= "{\"Employee\":[{\"id\":\"101\",\"name\":\"Class:\",\"salary\":\"SPC112 has been postponed to Wed 2.30pm @SR6 \"},{\"id\":\"102\",\"name\":\"Exams:\",\"salary\":\"There is a change of venue of SPY312 exam from NCT7 to NCT5\"},{\"id\":\"103\",\"name\":\"Exams:\",\"salary\":\"There is a slight change of venue of SPY312 exam from NCT7 to NCT5\"},{\"id\":\"104\",\"name\":\"Class:\",\"salary\":\"There is a slight change of venue of SPY312 exam from NCT5 to NCT6\"}]}";
String str="";
ListView listView;
Database database;
@Override
public void onAttach(Activity activity){
super.onAttach(activity);
database=new Database(activity);
}
@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {
View rootView=inflater.inflate(R.layout.inbox,container,false);
database.getWritableDatabase();
listView=(ListView)rootView.findViewById(R.id.listView);
try
{
JSONObject jsonObject=new JSONObject(ParsingDta);
JSONArray jsonArray= jsonObject.getJSONArray("Employee");
for(int i=0;i<jsonArray.length();i++)
{
JSONObject jsonObject1=jsonArray.getJSONObject(i);
String id=jsonObject1.getString("id").toString();
String name=jsonObject1.getString("name").toString();
String salary=jsonObject1.getString("salary").toString();
database.insertData(id,name,salary);
str+="\n Employee"+i+ "\n name:"+name+"\n id:"+id+"\n salary:" +salary+"\n";
//textView1.setText(str);
}
}
catch(JSONException e)
{
e.printStackTrace();
}
ArrayList<ContactListItems> contactList =database.fetchData();
ContactListAdapter contactListAdapter = new ContactListAdapter(
getActivity().getApplicationContext(), contactList);
listView.setAdapter(contactListAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
ImageView imageView = ((ImageView) view);
imageView.setImageResource(R.drawable.open);
imageView.invalidate();
Intent intent=new Intent(getActivity().getApplicationContext(),InboxDetails.class);
startActivity(intent);
}
});
setListViewHeightBasedOnChildren(listView);
return rootView;
}
private void setListViewHeightBasedOnChildren(ListView listView) {
ContactListAdapter contactListAdapter = (ContactListAdapter) listView.getAdapter();
if (contactListAdapter == null)
return;
int desiredWidth = View.MeasureSpec.makeMeasureSpec(listView.getWidth(), View.MeasureSpec.UNSPECIFIED);
int totalHeight = 0;
View view = null;
for (int i = 0; i < contactListAdapter.getCount(); i++) {
view = contactListAdapter.getView(i, view,listView);
if (i == 0)
view.setLayoutParams(new ViewGroup.LayoutParams(desiredWidth, ViewGroup.LayoutParams.WRAP_CONTENT));
view.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);
totalHeight += view.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (contactListAdapter.getCount() - 1));
listView.setLayoutParams(params);
listView.requestLayout();
}
}
ContactListItems：
public class ContactListItems {
String id;
String name;
String salary;
public ImageView img;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName( String name) {
this.name = name;
}
public String getSalary() {
return salary;
}
public void setSalary(String salary) {
this.salary = salary;
}
}
contact_list_row.xml：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:background="@drawable/list_background_selector"
android:layout_height="match_parent">
<TextView
android:id="@+id/tv_slno"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="id"
android:textColor="#000000"
android:textSize="10dp"
android:typeface="monospace"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_marginRight="42dp"
android:layout_marginEnd="42dp" />
<TextView
android:id="@+id/tv_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="title"
android:textColor="#000000"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_marginLeft="14dp"
android:layout_marginStart="14dp"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/imageView"
android:layout_toEndOf="@+id/imageView" />
<ImageView
android:layout_width="50dp"
android:layout_height="50dp"
android:src="@drawable/list"
android:id="@+id/imageView"
android:paddingTop="6dp"
android:paddingBottom="6dp"
android:layout_gravity="center_horizontal"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp" />
<TextView
android:id="@+id/tv_phone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="description"
android:singleLine="true"
android:textColor="#000000"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_alignBottom="@+id/imageView"
android:layout_alignLeft="@+id/tv_name"
android:layout_alignStart="@+id/tv_name" />
</RelativeLayout>
答案 0 :(得分：1)
试
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
/*******************************************************************/
ImageView imageView = (ImageView)view.findViewById(R.id.imageView);
/*******************************************************************/
imageView.setImageResource(R.drawable.open);
imageView.invalidate();