我正在使用ExpandableListview从服务器加载动态数据。
每个Group Header都有不同的Child Layout。
单击Group Header从Child view服务器加载数据。我正在显示从服务器检索到的图像，但它没有按预期工作
并非所有图像都显示在Child view
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
_childText = (String) getChild(groupPosition, childPosition);
if (convertView == null) {
viewHolder=new ViewHolder();
if(("Shape").equals(_listDataHeader.get(groupPosition))){
convertView = infalInflater.inflate(R.layout.list_child_shape, null);
viewHolder.txtTitle = (TextView) convertView.findViewById(R.id.list_child_chkbox);
viewHolder.img_shape_icon=(ImageView)convertView.findViewById(R.id.img_shape);
viewHolder.img_shape_icon.setVisibility(View.VISIBLE);
new PerformBackgroungTask().execute();
}
else{
//viewHolder.img_shape_icon.setVisibility(View.GONE);
if (("Clarity").equals(_listDataHeader.get(groupPosition))) {
convertView = infalInflater.inflate(R.layout.list_child_clarity, null);
viewHolder.clarity_from = (Spinner) convertView.findViewById(R.id.spn_clarity_from);
viewHolder.clarity_to = (Spinner) convertView.findViewById(R.id.spn_clarity_to);
ArrayAdapter adapter = new ArrayAdapter(_context, android.R.layout.simple_spinner_item, SearchActivity.clarity_list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
viewHolder.clarity_from.setAdapter(adapter);
viewHolder.clarity_to.setAdapter(adapter);
}
else if (("Color").equals(_listDataHeader.get(groupPosition))) {
convertView = infalInflater.inflate(R.layout.list_child_clarity, null);
viewHolder.clarity_from = (Spinner) convertView.findViewById(R.id.spn_clarity_from);
viewHolder.clarity_to = (Spinner) convertView.findViewById(R.id.spn_clarity_to);
ArrayAdapter adapter = new ArrayAdapter(_context, android.R.layout.simple_spinner_item, SearchActivity.color_list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
viewHolder.clarity_from.setAdapter(adapter);
viewHolder.clarity_to.setAdapter(adapter);
}
}
}
//new PerformBackgroungTask().execute();
return convertView;
}
后台任务
class PerformBackgroungTask extends AsyncTask<Void, Void, Void>{
ProgressDialog progressDialog=new ProgressDialog(_context);
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
//requestWindowFeature(Window.FEATURE_NO_TITLE);
progressDialog.setMessage("Please wait...");
progressDialog.setIndeterminate(true);
progressDialog.show();
}
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
try{
URL url = new URL("http://rosycontact.com/shashvat/images/"+_childText+".png");
bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
}
catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
viewHolder.txtTitle.setText(_childText);
viewHolder.img_shape_icon.setImageBitmap(bmp);
if (progressDialog!=null && progressDialog.isShowing()) {
progressDialog.dismiss();
}
}
}
获取子视图代码...
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
_childText = (String) getChild(groupPosition, childPosition);
int viewIndex=childPosition;
ViewHolder viewHolder;
switch (viewIndex) {
case 0:
viewHolder = null;
if (convertView==null) {
viewHolder=new ViewHolder();
viewHolder=new ViewHolder();
convertView = infalInflater.inflate(R.layout.list_child_shape, null);
viewHolder.txtTitle = (TextView) convertView.findViewById(R.id.list_child_chkbox);
viewHolder.img_shape_icon=(ImageView)convertView.findViewById(R.id.img_shape);
viewHolder.img_shape_icon.setVisibility(View.VISIBLE);
imageLoader.DisplayImage("http://rosycontact.com/shashvat/images/"+_childText+".png", viewHolder.img_shape_icon);
convertView.setTag(viewHolder);
//new PerformBackgroungTask().execute();
}
else{
viewHolder=(ViewHolder)convertView.getTag();
}
return convertView;
case 1:
viewHolder = null;
if (convertView==null) {
convertView = infalInflater.inflate(R.layout.list_child_clarity, null);
viewHolder.clarity_from = (Spinner) convertView.findViewById(R.id.spn_clarity_from);
viewHolder.clarity_to = (Spinner) convertView.findViewById(R.id.spn_clarity_to);
ArrayAdapter adapter = new ArrayAdapter(_context, android.R.layout.simple_spinner_item, SearchActivity.clarity_list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
viewHolder.clarity_from.setAdapter(adapter);
viewHolder.clarity_to.setAdapter(adapter);
convertView.setTag(viewHolder);
}
else{
viewHolder=(ViewHolder)convertView.getTag();
}
return convertView;
case 2:
viewHolder = null;
if (convertView==null) {
viewHolder=new ViewHolder();
convertView = infalInflater.inflate(R.layout.list_child_clarity, null);
viewHolder.clarity_from = (Spinner) convertView.findViewById(R.id.spn_clarity_from);
viewHolder.clarity_to = (Spinner) convertView.findViewById(R.id.spn_clarity_to);
ArrayAdapter adapter = new ArrayAdapter(_context, android.R.layout.simple_spinner_item, SearchActivity.color_list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
viewHolder.clarity_from.setAdapter(adapter);
viewHolder.clarity_to.setAdapter(adapter);
convertView.setTag(viewHolder);
}
else{
viewHolder=(ViewHolder)convertView.getTag();
}
return convertView;
case 3:
viewHolder = null;
if (convertView==null) {
viewHolder=new ViewHolder();
convertView = infalInflater.inflate(R.layout.list_child_clarity, null);
viewHolder.clarity_from = (Spinner) convertView.findViewById(R.id.spn_clarity_from);
viewHolder.clarity_to = (Spinner) convertView.findViewById(R.id.spn_clarity_to);
ArrayAdapter adapter = new ArrayAdapter(_context, android.R.layout.simple_spinner_item, SearchActivity.polish_list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
viewHolder.clarity_from.setAdapter(adapter);
viewHolder.clarity_to.setAdapter(adapter);
convertView.setTag(viewHolder);
}
else{
viewHolder=(ViewHolder)convertView.getTag();
}
return convertView;
case 4:
viewHolder = null;
if (convertView==null) {
viewHolder=new ViewHolder();
convertView = infalInflater.inflate(R.layout.list_child_clarity, null);
viewHolder.clarity_from = (Spinner) convertView.findViewById(R.id.spn_clarity_from);
viewHolder.clarity_to = (Spinner) convertView.findViewById(R.id.spn_clarity_to);
ArrayAdapter adapter = new ArrayAdapter(_context, android.R.layout.simple_spinner_item, SearchActivity.cut_list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
viewHolder.clarity_from.setAdapter(adapter);
viewHolder.clarity_to.setAdapter(adapter);
convertView.setTag(viewHolder);
}
else{
viewHolder=(ViewHolder)convertView.getTag();
}
return convertView;
case 5:
viewHolder = null;
if (convertView==null) {
viewHolder=new ViewHolder();
convertView = infalInflater.inflate(R.layout.list_child_clarity, null);
viewHolder.clarity_from = (Spinner) convertView.findViewById(R.id.spn_clarity_from);
viewHolder.clarity_to = (Spinner) convertView.findViewById(R.id.spn_clarity_to);
ArrayAdapter adapter = new ArrayAdapter(_context, android.R.layout.simple_spinner_item, SearchActivity.symmetry_list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
viewHolder.clarity_from.setAdapter(adapter);
viewHolder.clarity_to.setAdapter(adapter);
convertView.setTag(viewHolder);
}
else{
viewHolder=(ViewHolder)convertView.getTag();
}
return convertView;
case 6:
viewHolder = null;
if (convertView==null) {
viewHolder=new ViewHolder();
convertView = infalInflater.inflate(R.layout.list_child_clarity, null);
viewHolder.clarity_from = (Spinner) convertView.findViewById(R.id.spn_clarity_from);
viewHolder.clarity_to = (Spinner) convertView.findViewById(R.id.spn_clarity_to);
ArrayAdapter adapter = new ArrayAdapter(_context, android.R.layout.simple_spinner_item, SearchActivity.florescence_list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
viewHolder.clarity_from.setAdapter(adapter);
viewHolder.clarity_to.setAdapter(adapter);
convertView.setTag(viewHolder);
}
else{
viewHolder=(ViewHolder)convertView.getTag();
}
return convertView;
case 7:
viewHolder = null;
if (convertView==null) {
viewHolder=new ViewHolder();
convertView = infalInflater.inflate(R.layout.list_child_clarity, null);
viewHolder.clarity_from = (Spinner) convertView.findViewById(R.id.spn_clarity_from);
viewHolder.clarity_to = (Spinner) convertView.findViewById(R.id.spn_clarity_to);
ArrayAdapter adapter = new ArrayAdapter(_context, android.R.layout.simple_spinner_item, SearchActivity.certificate_list);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
viewHolder.clarity_from.setAdapter(adapter);
viewHolder.clarity_to.setAdapter(adapter);
convertView.setTag(viewHolder);
}
else{
viewHolder=(ViewHolder)convertView.getTag();
}
return convertView;
default:
break;
}
/*// Changing textcolor
viewHolder.clarity_from.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
String item = (String) parent.getItemAtPosition(position);
((TextView) parent.getChildAt(0)).setTextColor(Color.parseColor("#003974"));
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// TODO Auto-generated method stub
}
});
viewHolder.clarity_to.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
String item = (String) parent.getItemAtPosition(position);
((TextView) parent.getChildAt(0)).setTextColor(Color.parseColor("#003974"));
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// TODO Auto-generated method stub
}
}); */
//new PerformBackgroungTask().execute();
return null;
}