我有一个包含ImageView和TextView的列表。我读了扫描时间，并且必须设置textview的指定位置。这是以正确的方式完成的，但是在向下滚动然后向上设置Listview中的另一个文本视图。我看到这不是新的，但我无法解决这个问题。任何想法？ BaseAdapter如下。我尝试了一周多但没有解决方案
@Override
public View getView( final int position, View convertView, ViewGroup parent) {
if (convertView == null) {
Log.d("convertView", "NULLL");
convertView = LayoutInflater.from(mContenxt).inflate(
R.layout.list_items, null);
holder = new ViewHolder();
holder.textView = (TextView) convertView
.findViewById(R.id.placeName);
holder.imageView = (ImageView) convertView
.findViewById(R.id.itemSymbole);
holder.textDate = (TextView) convertView
.findViewById(R.id.txtViewTimeAndDate);
holder.imageMap = (ImageView)convertView.findViewById(R.id.imageViewMap);
holder.linearLayoutText = ( LinearLayout)convertView.findViewById(R.id.txtViewList);
holder.linearLayoutImage = ( LinearLayout)convertView.findViewById(R.id.thumbnail);
convertView.setTag(holder);
}
Log.d("convertView", "Not NULLLL");
holder = (ViewHolder) convertView.getTag();
holder.id = position;
holder.textView.setText(items.get(position).get("ProductName"));
holder.imageView.setId(position);
holder.linearLayoutText.setBackgroundColor(position);
if (items.get(position).get("Identifier")
.equals(com.metasec.wachmann.ItemActivity.uID)) {
holder.linearLayoutText.setBackgroundColor(Color.CYAN);
holder.imageView.setImageResource(R.drawable.ok);
Log.d("TIMEEEE", ItemActivity.scannDateAndTime);
holder.textDate.setText(ItemActivity.scannDateAndTime);
notifyDataSetChanged();
}else {
holder.imageView.setImageResource(R.drawable.not_ok);
holder.textDate.setText("");
notifyDataSetChanged();
}
holder.linearLayoutText.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
holder.linearLayoutText.setBackgroundColor(position);
holder.linearLayoutText.setBackgroundColor(Color.RED);
notifyDataSetChanged();
String placeName = items.get(position).get("ProductName");
String identifier = items.get(position).get("Identifier");
String itemId = items.get(position).get("ItemId");
String propertyBaseId = null;
String gpsCoordinates = null;
GPSTracker gpsTracker = new GPSTracker(mContenxt);
gpsTracker.stopUsingGPS();
double latitude = 0;
double longitude = 0;
if (gpsTracker.canGetLocation()) {
latitude = gpsTracker.getLatitude();
longitude = gpsTracker.getLongitude();
gpsCoordinates = latitude + ", " + longitude;
}
for (int k = 0; k < LoggedActivity.propertyBaseList.size(); k++) {
if (LoggedActivity.propertyBaseList.get(k).getName()
.equals("xxxxxxx")) {
propertyBaseId = LoggedActivity.propertyBaseList.get(k)
.getPropertyBaseId();
Intent intentSenderDataToServer = new Intent(mContenxt,
SenderReportDemageToServerActivity.class);
// give ItemId
intentSenderDataToServer.putExtra(ITEM_ID, itemId);
// give GroupId
intentSenderDataToServer.putExtra(PRODUCT_NAME,
placeName);
// give GroupName
intentSenderDataToServer.putExtra(IDENTIFIER,
identifier);
// give PropertyBaseID
intentSenderDataToServer.putExtra(PROPERTY_BASE_ID,
propertyBaseId);
// give GPS Coordinates
intentSenderDataToServer.putExtra(GPS_COORDINATES,
gpsCoordinates);
Log.d("items.get(position).get(ProductNNNNName)", items
.get(position).get("ProductName"));
intentSenderDataToServer.putExtra("ProductName",
placeName);
intentSenderDataToServer.putExtra("Identifier",
identifier);
mContenxt.startActivity(intentSenderDataToServer);
} // END IF Loop
} // END FOR Loop
}
});
holder.imageMap.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String placeName = items.get(position).get("ProductName");
String identifier = items.get(position).get("Identifier");
String itemId = items.get(position).get("ItemId");
Log.d("placeName11",placeName);
Log.d("identifier111",identifier);
Log.d("itemId111",itemId);
Intent intentWachmanMapActivitiy = new Intent(mContenxt,
WachmanOpenStreetMapViewActivity.class);
intentWachmanMapActivitiy.putExtra(ITEM_ID, itemId);
// give GroupId
intentWachmanMapActivitiy.putExtra(PRODUCT_NAME,
placeName);
// give GroupName
intentWachmanMapActivitiy.putExtra(IDENTIFIER,
identifier);
Log.d("items.get(position).get(ProductNNNNName)", items
.get(position).get("ProductName"));
intentWachmanMapActivitiy.putExtra("ProductName",
placeName);
intentWachmanMapActivitiy.putExtra("Identifier",
identifier);
mContenxt.startActivity(intentWachmanMapActivitiy);
}
});
return convertView;
}
static class ViewHolder {
TextView textView = null;
TextView textDate = null;
CheckBox checkbox = null;
ImageView imageView = null;
ImageView imageMap = null;
ImageButton imageButtonMap = null;
LinearLayout linearLayoutText = null;
LinearLayout linearLayoutImage = null;
int id;
}
以下类显示了我自己的适配器的调用位置。我backgroudn我必须调用我的适配器，前一次和数字必须保留。
private class SendBackground extends AsyncTask<Void, Void, Boolean>
{
@Override
protected void onPreExecute() {
mProgDialog = new ProgressDialog(getBaseContext());
mProgDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mProgDialog = ProgressDialog.show(ItemActivity.this, "Sending", " Please Wait" );
}
@Override
protected Boolean doInBackground(Void... params) {
// TODO Auto-generated method stub
return httpRequest.postData(itemIdTmp, propertyBaseIdtmp, uID, coordinatesTmp);
}
@Override
protected void onPostExecute(Boolean result) {
Log.d("SendBackground", "onPostExecute");
if (result == true) {
Log.d("onPostExecute", "TRUE");
//mProgressBar.setVisibility(View.GONE);
mProgDialog.dismiss();
Toast.makeText(getApplicationContext(), "Data sent..",
Toast.LENGTH_LONG).show();
/*----------------------------->>>> Whenever from Server True is return then my oown adapter hast to be adapted, as mentioned the state and time of previous items have to be remained */
//setListAdapter(myBaseAdapterItemActivity);
listView.setAdapter(myBaseAdapterItemActivity);
myBaseAdapterItemActivity.notifyDataSetChanged();
} else {
mProgDialog.dismiss();
Toast.makeText(getApplicationContext(),
"Sending Data to Server failed", Toast.LENGTH_LONG)
.show();
}
}
}
答案 0 :(得分：0)
//阅读我写的所有需要修改的评论 //不要在适配器内调用notify dataset change。 //如果它不起作用，那么我将编写一个示例代码
@Override
public View getView( final int position, View convertView, ViewGroup parent) {
ViewHolder holder = null; // use it
if (convertView == null) {
Log.d("convertView", "NULLL");
convertView = LayoutInflater.from(mContenxt).inflate(
R.layout.list_items, null);
holder = new ViewHolder();
holder.textView = (TextView) convertView
.findViewById(R.id.placeName);
holder.imageView = (ImageView) convertView
.findViewById(R.id.itemSymbole);
holder.textDate = (TextView) convertView
.findViewById(R.id.txtViewTimeAndDate);
holder.imageMap = (ImageView)convertView.findViewById(R.id.imageViewMap);
holder.linearLayoutText = ( LinearLayout)convertView.findViewById(R.id.txtViewList);
holder.linearLayoutImage = ( LinearLayout)convertView.findViewById(R.id.thumbnail);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag(); // new changes
Log.d("convertView", "Not NULLLL");
}
holder.id = position;
holder.textView.setText(items.get(position).get("ProductName"));
holder.imageView.setId(position); // why you set position it will cause error
//holder.linearLayoutText.setBackgroundColor(position);
if (items.get(position).get("Identifier")
.equals(com.metasec.wachmann.ItemActivity.uID)) {
holder.linearLayoutText.setBackgroundColor(Color.CYAN);
holder.imageView.setImageResource(R.drawable.ok);
Log.d("TIMEEEE", ItemActivity.scannDateAndTime);
holder.textDate.setText(ItemActivity.scannDateAndTime);
// notifyDataSetChanged(); no need to call it.
}else {
holder.imageView.setImageResource(R.drawable.not_ok);
holder.linearLayoutText.setBackgroundColor(Color.GREEN);
holder.textDate.setText("");
//notifyDataSetChanged(); no need to call it.
}
holder.linearLayoutText.setTag(position);
holder.linearLayoutText.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// holder.linearLayoutText.setBackgroundColor(position);
holder.linearLayoutText.setBackgroundColor(Color.RED);
// notifyDataSetChanged();
int selectedPosition = (Integer)v.getTag();
String placeName = items.get(selectedPosition).get("ProductName");
String identifier = items.get(selectedPosition).get("Identifier");
String itemId = items.get(selectedPosition).get("ItemId");
String propertyBaseId = null;
String gpsCoordinates = null;
GPSTracker gpsTracker = new GPSTracker(mContenxt);
gpsTracker.stopUsingGPS();
double latitude = 0;
double longitude = 0;
if (gpsTracker.canGetLocation()) {
latitude = gpsTracker.getLatitude();
longitude = gpsTracker.getLongitude();
gpsCoordinates = latitude + ", " + longitude;
}
// you are starting activity in lop it is dangerous because
// you are launching many activity.
// you should pass array
// i do not know are requirement.
for (int k = 0; k < LoggedActivity.propertyBaseList.size(); k++) {
if (LoggedActivity.propertyBaseList.get(k).getName()
.equals("xxxxxxx")) {
propertyBaseId = LoggedActivity.propertyBaseList.get(k)
.getPropertyBaseId();
Intent intentSenderDataToServer = new Intent(mContenxt,
SenderReportDemageToServerActivity.class);
// give ItemId
intentSenderDataToServer.putExtra(ITEM_ID, itemId);
// give GroupId
intentSenderDataToServer.putExtra(PRODUCT_NAME,
placeName);
// give GroupName
intentSenderDataToServer.putExtra(IDENTIFIER,
identifier);
// give PropertyBaseID
intentSenderDataToServer.putExtra(PROPERTY_BASE_ID,
propertyBaseId);
// give GPS Coordinates
intentSenderDataToServer.putExtra(GPS_COORDINATES,
gpsCoordinates);
Log.d("items.get(position).get(ProductNNNNName)", items
.get(position).get("ProductName"));
intentSenderDataToServer.putExtra("ProductName",
placeName);
intentSenderDataToServer.putExtra("Identifier",
identifier);
mContenxt.startActivity(intentSenderDataToServer);
} // END IF Loop
} // END FOR Loop
}
});
holder.imageMap.setTag(postion);
holder.imageMap.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int selectedPosition = (Integer)v.getTag();
String placeName = items.get(selectedPosition).get("ProductName");
String identifier = items.get(selectedPosition).get("Identifier");
String itemId = items.get(selectedPosition).get("ItemId");
Log.d("placeName11",placeName);
Log.d("identifier111",identifier);
Log.d("itemId111",itemId);
Intent intentWachmanMapActivitiy = new Intent(mContenxt,
WachmanOpenStreetMapViewActivity.class);
intentWachmanMapActivitiy.putExtra(ITEM_ID, itemId);
// give GroupId
intentWachmanMapActivitiy.putExtra(PRODUCT_NAME,
placeName);
// give GroupName
intentWachmanMapActivitiy.putExtra(IDENTIFIER,
identifier);
Log.d("items.get(position).get(ProductNNNNName)", items
.get(position).get("ProductName"));
intentWachmanMapActivitiy.putExtra("ProductName",
placeName);
intentWachmanMapActivitiy.putExtra("Identifier",
identifier);
mContenxt.startActivity(intentWachmanMapActivitiy);
}
});
return convertView;
}
static class ViewHolder {
TextView textView = null;
TextView textDate = null;
CheckBox checkbox = null;
ImageView imageView = null;
ImageView imageMap = null;
ImageButton imageButtonMap = null;
LinearLayout linearLayoutText = null;
LinearLayout linearLayoutImage = null;
int id;
}