I have a spinner that gets populated from a text file stored on a web server. The contents of this text file are then stored in an ArrayList. My app is going to have the user add an item to this text file that they name themselves and therefore update the spinner. What I need to be able to do is have the spinner do something when an item is selected. As the user can give any name to an item they add, how can my app do something when that particular item is selected from the spinner if it doesn't know what they named it?
Right now I have my app set up so that if spinner item equals "string" do this... but this obviously won't work if the user has named an item themselves. I hope I have explained my question ok! This is my code so far:
public class MainActivity extends AppCompatActivity {
String statusLink = "http://redacted.uk/pmt/status.txt";
String deviceLink = "http://redacted.uk/pmt/devices.txt";
String status;
final String degree = "\u00b0";
ArrayList<String> devicesAL = new ArrayList<>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Thread thread = new Thread(new Runnable() {
#Override
public void run() {
try {
// Set up connection to device.txt on web server
URL deviceUrl = new URL (deviceLink);
URLConnection deviceConn = deviceUrl.openConnection();
deviceConn.setDoOutput(true);
deviceConn.connect();
InputStream dis = deviceConn.getInputStream();
InputStreamReader disr = new InputStreamReader(dis, "UTF-8");
BufferedReader dbr = new BufferedReader(disr);
String deviceLine;
// Set up connection to status.txt on web server
URL statusUrl = new URL(statusLink);
URLConnection statusConn = statusUrl.openConnection();
statusConn.setDoOutput(true);
statusConn.connect();
InputStream sis = statusConn.getInputStream();
InputStreamReader sisr = new InputStreamReader(sis, "UTF-8");
BufferedReader sbr = new BufferedReader(sisr);
String statusLine;
try {
while ((deviceLine = dbr.readLine()) != null) {
//System.out.println(deviceLine);
devicesAL.add(deviceLine);
for (String str : devicesAL) {
System.out.println(str);
}
}
while ((statusLine = sbr.readLine()) != null) {
System.out.println(statusLine);
status = statusLine;
System.out.println("Status = " + status);
TextView output = (TextView) findViewById(R.id.textView);
System.out.println(status);
}
for (String str : devicesAL) {
System.out.println(str);
}
runOnUiThread(new Runnable() {
#Override
public void run() {
//LOAD SPINNER
Spinner spinner = (Spinner) findViewById(R.id.spinner);
ArrayAdapter adp = new ArrayAdapter(MainActivity.this, android.R.layout.simple_spinner_item, devicesAL);
adp.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adp);
adp.notifyDataSetChanged();
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
TextView output = (TextView) findViewById(R.id.textView);
if (parent.getItemAtPosition(position).equals("Water Cooler")) {
System.out.println("Water cooler selected");
output.setText(status);
}
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
});
} finally {
sbr.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
});
thread.start();
}
}
Since you say you want to :
If the user then selects "fridge" from the spinner, the data inside fridge.txt gets displayed
So i think you can just get the file name from the spinner then show the content. It will be like this :
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String selectedFileName = parent.getItemAtPosition(position);
File sdcard = Environment.getExternalStorageDirectory();
File file = new File(sdcard, selectedFileName+".txt");
//Read text from file
StringBuilder text = new StringBuilder();
try {
BufferedReader br = new BufferedReader(new FileReader(file));
String line;
while ((line = br.readLine()) != null) {
text.append(line);
text.append('\n');
}
br.close();
}
catch (IOException e) {}
TextView tvText = (TextView)findViewById(R.id.tvText);
tvText.setText(text.toString());
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
Related
So basically my AsyncTask get the value from the url and when i execute i wanna show green text or red text if contains ("-").
I have search around and none of the option worked for me. i do have a RecyclerView.ViewHolder but don't know how to incorporate before i execute. Everything works, except the colors.
Thank you in advance
Activity
public class BTCData extends AsyncTask<Void,RecyclerView.ViewHolder,Void> {
String data = "";
String dataParsed1h ="";
String dataParsed24h ="";
String dataParsed7d ="";
String percent_change_1h = "";
String percent_change_24h = "";
String percent_change_7d = "";
Activity activity;
List<Model> items;
public BTCData() {
}
#Override
protected Void doInBackground(Void... voids) {
try {
URL url = new URL ("https://...");
HttpURLConnection httpURLConnection = (java.net.HttpURLConnection) url.openConnection();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String line = "";
while (line != null){
line = bufferedReader.readLine();
data = data+line;
}
JSONArray JA = new JSONArray(data);
for(int i=0 ;i< JA.length(); i++){
JSONObject JO = (JSONObject) JA.get(i);
percent_change_1h = "1H " + JO.getString("percent_change_1h") + "%";
percent_change_24h = "24H " + JO.getString("percent_change_24h") + "%";
percent_change_7d = "7D " + JO.getString("percent_change_7d") + "%" ;
dataParsed1h = dataParsed1h + percent_change_1h;
dataParsed24h = dataParsed24h + percent_change_7d;
dataParsed7d = dataParsed7d + percent_change_24h;
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
MainActivity.btc_percent_change_1h.setText(this.dataParsed1h);
MainActivity.btc_percent_change_24h.setText(this.dataParsed24h);
MainActivity.btc_percent_change_7d.setText(this.dataParsed7d);
}
}```
**View Holder**
public class CoinAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
Adapter adapter;
boolean isLoading;
Activity activity;
List<Model> items;
int visibleThreshold = 5,lastVisibleItem, totalItemcount;
public void setAdapter(Adapter adapter) {
this.adapter = adapter;
}
#NonNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(activity)
.inflate(R.layout.activity_main,parent,false);
return new CoinViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, int position) {
Model item = items.get(position);
CoinViewHolder holderItem = (CoinViewHolder)holder;
holderItem.btc_percent_change_1h.setTextColor(item.getPercentage_change_1h().contains("-")?
Color.parseColor("#FF0000"):Color.parseColor("#32CD32"));
holderItem.btc_percent_change_24h.setTextColor(item.getPercentage_change_24h().contains("-")?
Color.parseColor("#FF0000"):Color.parseColor("#32CD32"));
holderItem.btc_percent_change_7d.setTextColor(item.getPercentage_change_7d().contains("-")?
Color.parseColor("#FF0000"):Color.parseColor("#32CD32"));
}
#Override
public int getItemCount() {
return items.size();
}
public void setLoader() {isLoading = true;}
public void updateData (List<Model> models)
{
this.items = models;
notifyDataSetChanged();
}
**on Activity**
public static TextView btc_percent_change_1h;
public static TextView btc_percent_change_24h;
public static TextView btc_percent_change_7d;
//Percentage
btc_percent_change_1h = (TextView) findViewById(R.id.btc_percent_change_1h);
btc_percent_change_24h = (TextView) findViewById(R.id.btc_percent_change_24h);
btc_percent_change_7d = (TextView) findViewById(R.id.btc_percent_change_7d);
and finally call...
BTCData process = new BTCData();
process.execute();
This is because for setting color you are doing in onBindViewHolder when in that case data would be 0 only without red sign and later you are setting data but after that onBindViewHolder is not called and hence changes are not reflecting.
The way you are doing all this is not ideal way and would suggest you to read design patterns to implement it in proper way.
Maybe is not the best option, but it works
#Override
protected void onPostExecute(CoinAdapter aVoid) {
super.onPostExecute(aVoid);
MainActivity.btc_percent_change_1h.setTextColor((this.dataParsed1h.contains("-")?
Color.parseColor("#FF0000"):Color.parseColor("#32CD32")));
MainActivity.btc_percent_change_1h.setText(this.dataParsed1h);
MainActivity.btc_percent_change_24h.setTextColor((this.dataParsed24h.contains("-")?
Color.parseColor("#FF0000"):Color.parseColor("#32CD32")));
MainActivity.btc_percent_change_24h.setText(this.dataParsed24h);
MainActivity.btc_percent_change_7d.setTextColor((this.dataParsed7d.contains("-")?
Color.parseColor("#FF0000"):Color.parseColor("#32CD32")));
MainActivity.btc_percent_change_7d.setText(this.dataParsed7d);
}
You can achieve it like. Get value in adapter according to position and change it color like this. Then cocatinate both string and show it. You can test it on multiple devices it will run and show exact in every devices.
String status = getColoredSpanned(act.getResources().getString(R.string.order_status),"#3EA7BD");
String variable_status =getColoredSpanned(act.getResources().getString(R.string.status_order_pending),"#E23941");
String text = status+variable_status;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
myViewHolder.tv_order_product_status.setText(Html.fromHtml(text, Html.FROM_HTML_MODE_LEGACY), TextView.BufferType.SPANNABLE);
} else {
myViewHolder.tv_order_product_status.setText(Html.fromHtml(text), TextView.BufferType.SPANNABLE);
}
i am trying to send Data (ID value) from one activity to other
but it wouldn't send correct data , i want it to send only ID Value of Clicked Item to next activity , here is my code
public class Order extends AppCompatActivity {
private ListView lvUsers;
private ProgressDialog dialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sub);
dialog = new ProgressDialog(this);
dialog.setIndeterminate(true);
dialog.setCancelable(false);
dialog.setMessage("Loading, please wait.....");
lvUsers = (ListView) findViewById(R.id.lvUsers);
new JSONTask().execute("http://146.185.178.83/resttest/order");
}
public class JSONTask extends AsyncTask<String, String, List<OrderModel> > {
#Override
protected void onPreExecute(){
super.onPreExecute();
dialog.show();
}
#Override
protected List<OrderModel> doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
URL url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
StringBuffer buffer = new StringBuffer();
String line ="";
while ((line=reader.readLine()) !=null){
buffer.append(line);
}
String finalJson = buffer.toString();
JSONArray parentArray = new JSONArray(finalJson);
List<OrderModel> orderModelList = new ArrayList<>();
Gson gson = new Gson();
for (int i = 0; i < parentArray.length(); i++) {
JSONObject finalObject = parentArray.getJSONObject(i);
OrderModel orderModel = gson.fromJson(finalObject.toString(), OrderModel.class);
orderModelList.add(orderModel);
}
return orderModelList;
}catch (MalformedURLException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} finally {
if(connection !=null) {
connection.disconnect();
}
try {
if (reader !=null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
#Override
protected void onPostExecute(List<OrderModel> result) {
super.onPostExecute(result);
dialog.dismiss();
OrderAdapter adapter = new OrderAdapter(getApplicationContext(), R.layout.row_order, result);
lvUsers.setAdapter(adapter);
}
}
public class OrderAdapter extends ArrayAdapter {
public List<OrderModel> orderModelList;
private int resource;
private LayoutInflater inflater;
public OrderAdapter(Context context, int resource, List<OrderModel> objects) {
super(context, resource, objects);
orderModelList = objects;
this.resource = resource;
inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if(convertView == null){
holder = new ViewHolder();
convertView=inflater.inflate(resource, null);
holder.bOrderNo = (Button) convertView.findViewById(R.id.bOrderNo);
convertView.setTag(holder);
}else {
holder = (ViewHolder) convertView.getTag();
}
final int orderId = orderModelList.get(position).getId();
holder.bOrderNo.setText("Order No: " + orderModelList.get(position).getOrderId());
holder.bOrderNo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(Order.this, OrderSelected.class);
intent.putExtra("parameter_name", orderId);
startActivity(intent);
}
});
return convertView;
}
class ViewHolder{
private Button bOrderNo;
}
}
}
The holder gets executed in loop i guess is why it wouldn't send right Id.
How do i get it to send only Id of the clicked orderId
you can check this link to see how json Response looks like http://146.185.178.83/resttest/order
You have a silly mistake in your code . I have edited single line in your code . I think you are getting same "orderId" every time instead of actual "orderId". Check this one . I hope your problem will resolve .
final int index = position;
holder.bOrderNo.setText("Order No: " + orderModelList.get(position).getOrderId());
holder.bOrderNo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(Order.this, OrderSelected.class);
intent.putExtra("parameter_name", orderModelList.get(index).getId());
startActivity(intent);
}
});
Please try
In place of
intent.putExtra("parameter_name", orderId);
Please put
intent.putExtra("parameter_name", orderModelList.get(position).getId());
I'm trying to populate an ArrayList of objects and use those objects to populate a ListView. My Asynctask can get the json data and I can parse it and make the objects I need but my ListView doesn't populate. When I check to see if my ArrayList has any object in it before the adapter runs I can see that it doesn't. I want to know why my ListView isn't populating.
Here's my code: (Sorry if it's messy, some spots I haven't gotten to updating yet)
public class MovieDisplayFragment extends Fragment{
private ArrayList<Movie> movieList = new ArrayList<Movie>();
private MovieAdapter movieAdapter;
ListView listView;
public MovieDisplayFragment(){
}
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
movieAdapter = new MovieAdapter(getActivity(), movieList);
listView = (ListView) rootView.findViewById(R.id.listview_data);
listView.setAdapter(movieAdapter);
if(movieList.size() > 0) {
Log.e("Hello", "1");
}
listView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l){
Movie movie = movieAdapter.getItem(position);
Intent i = new Intent(getActivity(), DetailActivity.class)
.putExtra(Intent.EXTRA_TEXT, "Hello");
startActivity(i);
}
});
return rootView;
}
private void updateMovieData(){
getMovieData movieData = new getMovieData();
movieData.execute();
}
#Override
public void onStart(){
super.onStart();
updateMovieData();
}
public class getMovieData extends AsyncTask<Void, Void, List<Movie>> {
private final String LOG_CAT = getMovieData.class.getSimpleName();
private List<Movie> getMovieData(String movieJsonStr) throws JSONException {
final String MOV_ITEMS = "results";
final String MOV_TITLE = "original_title";
final String MOV_DATE = "release_date";
final String MOV_SYNOPSIS = "overview";
final String MOV_VOTE = "vote_average";
final String MOV_POSTER_URL = "poster_path";
JSONObject movieJson = new JSONObject(movieJsonStr);
JSONArray movieArray = movieJson.getJSONArray(MOV_ITEMS);
Log.e("Hello", "2");
for (int i = 0; i < movieArray.length(); i++) {
JSONObject movie = movieArray.getJSONObject(i);
movieList.add(new Movie(movie.getString(MOV_TITLE), movie.getString(MOV_DATE),
movie.getString(MOV_SYNOPSIS), movie.getString(MOV_VOTE), movie.getString(MOV_POSTER_URL)));
}
return movieList;
}
protected List<Movie> doInBackground(Void... params) {
HttpURLConnection urlConnection = null;
BufferedReader reader = null;
String movieJsonStr = null;
try {
final String BASE_URL = "http://api.themoviedb.org/3/genre/10751/movies?api_key=358f3b44734f7e6404f2d01a62d3c176&include_all_movies=true&include_adult=true";
Uri builtUri = Uri.parse(BASE_URL).buildUpon().build();
URL url = new URL(builtUri.toString());
Log.v(LOG_CAT, "Built URI " + builtUri.toString());
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.connect();
InputStream inputStream = urlConnection.getInputStream();
StringBuffer buffer = new StringBuffer();
if (inputStream == null){
movieJsonStr = null;
}
reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
while((line = reader.readLine()) != null){
buffer.append(line + "\n");
}
if (buffer.length() == 0){
movieJsonStr = buffer.toString();
}
movieJsonStr = buffer.toString();
Log.v(LOG_CAT, "Movie String: " + movieJsonStr);
} catch (IOException e) {
Log.e("Fragment", "Error", e);
movieJsonStr = null;
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
if (reader != null) {
try {
reader.close();
} catch (final IOException e) {
Log.e("PlaceholderFragment", "Error closing stream", e);
}
}
}
try {
return getMovieData(movieJsonStr);
} catch (JSONException e) {
Log.e(LOG_CAT, e.getMessage(), e);
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(List<Movie> movies){
if(movies != null){
movieAdapter.clear();
for(Movie movieData : movies){
movieAdapter.add(movieData);
}
}
}
}
}
Put these 2 lines inside your onPostExecute() in Async.
movieAdapter = new MovieAdapter(getActivity(), movieList);
listView.setAdapter(movieAdapter);
AsyncTask runs in Background Thread. It gets the data from json after few seconds. But your adapter is called few milli seconds after your fragment is created.
So the data from the Json will not be there when you are setting the adapter.
Calling it in onPostExecute solves this problem as the adatpter is set after Json data is retrieved from the server!
Hope it helps a bit.
You are printing size of movieList (movieList.size()) much before movieList() is getting populated. It will never print "Hello" "1" in debugger. The asynctask will fill data in movieList much later than your movieList.size() check code in OnCreateView()
Anyways, after the below code
for(Movie movieData : movies)
{
movieAdapter.add(movieData);
}
you need to insert this bit:
listView.setAdapter(movieAdapter);
You are populating the adapter but not setting it to your listView in your onPostExecute() in your getMovieData Asynctask.
It looks like on post execute you are clearing the List that your adapter is using to populate the listview, then adding in new items to the list. However, in order to update the view after that happens, you need to call notifyDataSetChanged(); after updating the list
#Override
protected void onPostExecute(List<Movie> movies){
if(movies != null){
movieAdapter.clear();
for(Movie movieData : movies){
movieAdapter.add(movieData);
}
movieAdapter.notifyDataSetChanged();
}
}
I have an async task which populates a spinner with data. The spinner data comes from objects in a list. My problem is when I set the onclick listener for the items in the list I also want the id from the object not just the name:
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();
}
}
This line below is the line which get the beers name, but I do not know how to get also the id from the object which sets the listview name:
String portfolioChoice = portfolioType.getSelectedItem().toString();
Update:
I have changed my above code to this to incorporate a custom adapter:
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();
}
}
but on this line:
ShortBeerInfoAdapter<ShortBeerInfo> spinnerArrayAdapter = new ArrayAdapter<ShortBeerInfo>(c, android.R.layout.simple_spinner_item,tasteList );
I am getting shortbeerinfoadapter does not have type parameters
my short beer info adapter is:
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;
}
}
You have your ShortBeerInfo, which includes the name and ID. You take the beer name, add it to a list of strings, then create the ArrayAdapter from that list. The ArrayAdapter only contains the names.
To get the ID you will need a custom array adapter of type ShortBeerInfo. You'll need to override OnCreateView in the adapter to create the View object for the list item that only contains the beer name. (Or any other beer info you may want to display)
Then in your selection listener getSelectedItem will return a ShortBeerInfo, containing the ID of the selected beer.
Hi I am writting an android application to get information from a url and show it in a ListView. All are working well. but it takes long time to show the View because i read the file from url on onCreate() method.
I want read from the URL asynchronously, so view response time will not harmed.
Am I using the ProgressBar correctly?.
public class cseWatch extends Activity {
TextView txt1 ;
Button btnBack;
ListView listView1;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.searchresult);
Button btnBack=(Button) findViewById(R.id.btn_bck);
btnBack.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent MyIntent1 = new Intent(v.getContext(),cseWatchMain.class);
startActivity(MyIntent1);
}
});
ArrayList<SearchResults> searchResults = GetSearchResults();
//after loaded result hide progress bar
ProgressBar pb = (ProgressBar) findViewById(R.id.progressBar1);
pb.setVisibility(View.INVISIBLE);
final ListView lv = (ListView) findViewById(R.id.listView1);
lv.setAdapter(new MyCustomBaseAdapter(cseWatch.this, searchResults));
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
Object o = lv.getItemAtPosition(position);
SearchResults fullObject = (SearchResults)o;
Toast.makeText(cseWatch.this, "You have chosen: " + " " + fullObject.getName(), Toast.LENGTH_LONG).show();
}
});
}//end of onCreate
private ArrayList<SearchResults> GetSearchResults(){
ArrayList<SearchResults> results = new ArrayList<SearchResults>();
SearchResults sr;
InputStream in;
try{
txt1 = (TextView) findViewById(R.id.txtDisplay);
txt1.setText("Sending request...");
DefaultHttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet("http://www.myurl?reportType=CSV");
HttpResponse response = httpclient.execute(httpget);
in = response.getEntity().getContent();
txt1.setText("parsing CSV...");
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
try {
String line;
reader.readLine(); //IGNORE FIRST LINE
while ((line = reader.readLine()) != null) {
String[] RowData = line.split(",");
sr = new SearchResults();
String precent = String.format("%.2g%n",Double.parseDouble(RowData[12])).trim();
double chng=Double.parseDouble(RowData[11]);
String c;
if(chng > 0){
sr.setLine2Color(Color.GREEN);
c="▲";
}else if(chng < 0){
sr.setLine2Color(Color.rgb(255, 0, 14));
c="▼";
}else{
sr.setLine2Color(Color.rgb(2, 159, 223));
c="-";
}
sr.setName(c+RowData[2]+"-"+RowData[1]);
DecimalFormat fmt = new DecimalFormat("###,###,###,###.##");
String price = fmt.format(Double.parseDouble(RowData[6])).trim();
String tradevol = fmt.format(Double.parseDouble(RowData[8])).trim();
sr.setLine1("PRICE: Rs."+price+" TRADE VOL:"+tradevol);
sr.setLine2("CHANGE:"+c+RowData[11]+" ("+precent+"%)");
results.add(sr);
txt1.setText("Loaded...");
// do something with "data" and "value"
}
}
catch (IOException ex) {
Log.i("Error:IO",ex.getMessage());
}
finally {
try {
in.close();
}
catch (IOException e) {
Log.i("Error:Close",e.getMessage());
}
}
}catch(Exception e){
Log.i("Error:",e.getMessage());
new AlertDialog.Builder(cseWatch.this).setTitle("Watch out!").setMessage(e.getMessage()).setNeutralButton("Close", null).show();
}
return results;
}
}
AsyncTask should be used to move the heavylifting away from UI thread. http://developer.android.com/reference/android/os/AsyncTask.html
I think you should use a runable.
demo code:
final ListView lv = (ListView) findViewById(R.id.listView1);
Handler handler = new Handler(app.getMainLooper());
handler.postDelayed(new Runnable() {
#Override
public void run() {
lv.setAdapter(new MyCustomBaseAdapter(cseWatch.this, searchResults));
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
Object o = lv.getItemAtPosition(position);
SearchResults fullObject = (SearchResults)o;
Toast.makeText(cseWatch.this, "You have chosen: " + " " + fullObject.getName(), Toast.LENGTH_LONG).show();
}
});
}
}, 1000);
try it.^-^