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我有一個異步任務，用數據填充微調器。微調器數據來自列表中的對象。我的問題是，當我設置的onclick偵聽器列表中的項目我也想從對象不只是名字的ID：帶對象的Android微調器
public class PortfolioGetAllLists extends AsyncTask<String, Void, String> {
Context c;
PortfolioGetAllBeers.OnArticleSelectedListener useThis;
private ProgressDialog Dialog;
public PortfolioGetAllLists (Context context, PortfolioGetAllBeers.OnArticleSelectedListener thisListener)
{
c = context;
useThis = thisListener;
Dialog = new ProgressDialog(c);
}
@Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
return readJSONFeed(arg0[0]);
}
protected void onPreExecute() {
Dialog.setMessage("Getting Brewery List");
Dialog.setTitle("Loading");
Dialog.setCancelable(false);
Dialog.show();
}
protected void onPostExecute(String result){
//decode json here
try{
JSONArray jsonArray = new JSONArray(result);
//acces listview
final ListView lv = (ListView) ((Activity) c).findViewById(R.id.allYourBeersList);
//make array list for beer
final List<String> tasteList = new ArrayList<String>();
tasteList.add("");
for(int i = 0; i < jsonArray.length(); i++) {
String bID = jsonArray.getJSONObject(i).getString("id");
String beer = jsonArray.getJSONObject(i).getString("name");
String rate = "na";
String beerID = "na";
//create object
ShortBeerInfo tempTaste = new ShortBeerInfo(beer, rate, beerID, bID);
//add to arraylist
tasteList.add(beer);
}
// Selection of the spinner
Spinner spinner = (Spinner) ((Activity) c).findViewById(R.id.portfolioSpinner2);
// Application of the Array to the Spinner
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(c, android.R.layout.simple_spinner_item,tasteList);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
spinner.setAdapter(spinnerArrayAdapter);
//add on item selected
final Spinner portfolioType = (Spinner) ((Activity) c).findViewById(R.id.portfolioSpinner2);
portfolioType.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
String portfolioChoice = portfolioType.getSelectedItem().toString();
//Toast.makeText(((Activity) c).getApplicationContext(), portfolioChoice, Toast.LENGTH_LONG).show();
lv.setAdapter(null);
//get brewery beers
//get userID
//get user data
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(selectedItemView.getContext());
String userID = prefs.getString("userID", null);
try {
portfolioChoice = URLEncoder.encode(portfolioChoice, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
//construct url
String url = "myURL";
Log.d("portfolio", url);
//async task goes here
//new PortfolioGetAllBeers(selectedItemView.getContext()).execute(url);
PortfolioGetAllBeers task = new PortfolioGetAllBeers(c);
task.setOnArticleSelectedListener(useThis);
task.execute(url);
}
@Override
public void onNothingSelected(AdapterView<?> parentView) {
// do nothing
}
});
}
catch(Exception e){
}
Dialog.dismiss();
}
public String readJSONFeed(String URL) {
StringBuilder stringBuilder = new StringBuilder();
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(URL);
try {
HttpResponse response = httpClient.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) {
HttpEntity entity = response.getEntity();
InputStream inputStream = entity.getContent();
BufferedReader reader = new BufferedReader(
new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
stringBuilder.append(line);
}
inputStream.close();
} else {
Log.d("JSON", "Failed to download file");
}
} catch (Exception e) {
Log.d("readJSONFeed", e.getLocalizedMessage());
}
return stringBuilder.toString();
}
}
下面這條線是得到了啤酒的名字線，但我做的不知道如何從中設置列表視圖名稱的對象也得到了ID：
String portfolioChoice = portfolioType.getSelectedItem().toString();
Update:
我已經改變了我上面的代碼這包括自定義適配器：
public class PortfolioGetAllLists extends AsyncTask<String, Void, String> {
Context c;
PortfolioGetAllBeers.OnArticleSelectedListener useThis;
private ProgressDialog Dialog;
public PortfolioGetAllLists (Context context, PortfolioGetAllBeers.OnArticleSelectedListener thisListener)
{
c = context;
useThis = thisListener;
Dialog = new ProgressDialog(c);
}
@Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
return readJSONFeed(arg0[0]);
}
protected void onPreExecute() {
Dialog.setMessage("Getting Brewery List");
Dialog.setTitle("Loading");
Dialog.setCancelable(false);
Dialog.show();
}
protected void onPostExecute(String result){
//decode json here
try{
JSONArray jsonArray = new JSONArray(result);
//acces listview
final ListView lv = (ListView) ((Activity) c).findViewById(R.id.allYourBeersList);
//make array list for beer
final List<ShortBeerInfo> tasteList = new ArrayList<ShortBeerInfo>();
//tasteList.add("");
for(int i = 0; i < jsonArray.length(); i++) {
String bID = jsonArray.getJSONObject(i).getString("id");
String beer = jsonArray.getJSONObject(i).getString("name");
String rate = "na";
String beerID = "na";
//create object
ShortBeerInfo tempTaste = new ShortBeerInfo(beer, rate, beerID, bID);
//add to arraylist
tasteList.add(tempTaste);
}
// Selection of the spinner
Spinner spinner = (Spinner) ((Activity) c).findViewById(R.id.portfolioSpinner2);
// Application of the Array to the Spinner
ShortBeerInfoAdapter<ShortBeerInfo> spinnerArrayAdapter = new ArrayAdapter<ShortBeerInfo>(c, android.R.layout.simple_spinner_item,tasteList);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
spinner.setAdapter(spinnerArrayAdapter);
//add on item selected
final Spinner portfolioType = (Spinner) ((Activity) c).findViewById(R.id.portfolioSpinner2);
portfolioType.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
String portfolioChoice = portfolioType.getSelectedItem().toString();
//Toast.makeText(((Activity) c).getApplicationContext(), portfolioChoice, Toast.LENGTH_LONG).show();
lv.setAdapter(null);
//get brewery beers
//get userID
//get user data
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(selectedItemView.getContext());
String userID = prefs.getString("userID", null);
try {
portfolioChoice = URLEncoder.encode(portfolioChoice, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
//construct url
String url = "myURL";
Log.d("portfolio", url);
//async task goes here
//new PortfolioGetAllBeers(selectedItemView.getContext()).execute(url);
PortfolioGetAllBeers task = new PortfolioGetAllBeers(c);
task.setOnArticleSelectedListener(useThis);
task.execute(url);
}
@Override
public void onNothingSelected(AdapterView<?> parentView) {
// do nothing
}
});
}
catch(Exception e){
}
Dialog.dismiss();
}
public String readJSONFeed(String URL) {
StringBuilder stringBuilder = new StringBuilder();
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(URL);
try {
HttpResponse response = httpClient.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) {
HttpEntity entity = response.getEntity();
InputStream inputStream = entity.getContent();
BufferedReader reader = new BufferedReader(
new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
stringBuilder.append(line);
}
inputStream.close();
} else {
Log.d("JSON", "Failed to download file");
}
} catch (Exception e) {
Log.d("readJSONFeed", e.getLocalizedMessage());
}
return stringBuilder.toString();
}
}
，但在這條線：
ShortBeerInfoAdapter<ShortBeerInfo> spinnerArrayAdapter = new ArrayAdapter<ShortBeerInfo>(c, android.R.layout.simple_spinner_item,tasteList);
我越來越shortbeerinfoadapter沒有類型參數
我的短啤酒信息適配器是：
public class ShortBeerInfoAdapter extends ArrayAdapter<ShortBeerInfo> {
Context context;
int layoutResourceId;
List<ShortBeerInfo> data = null;
public ShortBeerInfoAdapter(Context context, int layoutResourceId, List<ShortBeerInfo> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
beerHolder holder = null;
if(row == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new beerHolder();
holder.txtBeer = (TextView)row.findViewById(R.id.breweryName);
holder.txtRate = (TextView)row.findViewById(R.id.breweryRate);
holder.txtBar = (RatingBar) row.findViewById(R.id.starbar);
row.setTag(holder);
}
else
{
holder = (beerHolder)row.getTag();
}
ShortBeerInfo beer = data.get(position);
holder.txtBeer.setText(beer.beer);
holder.txtRate.setText(beer.rate + " out of 5.00 Stars");
holder.numHolder= Float.parseFloat(beer.rate);
holder.txtBar.setNumStars(5);
holder.txtBar.setRating(holder.numHolder);
return row;
}
static class beerHolder
{
TextView txtBeer;
TextView txtRate;
RatingBar txtBar;
Float numHolder;
}
}
我可以使用這個陣列適配器我用於別的東西嗎？ https://gist.github.com/anonymous/74fccde80028718edbf8 – Mike
是的，它看起來應該做的竅門 – Flynny75
改變了它，但我仍然收到一些錯誤，我添加了新的代碼和我的適配器代碼，以我的上述問題更新。 – Mike