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Android Studio - Import data from csv and show in text (app crashes)

I am trying to import data from a csv file but my application crashes everytime. Below is my code that I have written. I receive no errors.
My main aim is to import data from the specified csv file and put in the variable called count_car. I want to show the value in the text box when I click the button. But I could not import the data from csv file.
package com.example.deneme2;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.lang.String;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView text_zeros = findViewById(R.id.TextNumberZero);
TextView text_ones = findViewById(R.id.TextNumberOne);
TextView textView = findViewById(R.id.textView);
TextView textView1 = findViewById(R.id.textView2);
Button button = findViewById(R.id.button);
String path = "C:\\Users\\baran\\Desktop\\FALL 2020\\ELEC491\\deneme\\11111111111\\venv\\numberofcars.csv";
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
BufferedReader csvReader = null;
try {
csvReader = new BufferedReader(new FileReader(path));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
String count_car = null;
int counting =0;
while (true) {
try {
if (!((count_car = csvReader.readLine()) != null)) break;
} catch (IOException e) {
e.printStackTrace();
}
//String[] data = count_car.split(",");
String count_cars = count_car;
int count_park= 100;
String countpark = String.valueOf(count_park);
String countcars = String.valueOf(count_cars);
text_ones.setText(countpark);
text_zeros.setText(countcars);
counting = counting +1 ;
if (counting == 50);
break;
}
}
});
}
}
EDIT 1
package com.example.exceldeneme;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Arrays;
import java.lang.String;
import java.util.List;
public class MainActivity<number_cars> extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView text_cars = findViewById(R.id.textCars);
readData();
String count_park = Arrays.toString(number_of_cars.get(1));
text_cars.setText(count_park);
}
private List<String[]> number_of_cars = new ArrayList<>();
private void readData() {
InputStream is = getResources().openRawResource(R.raw.numberofcars);
BufferedReader reader = new BufferedReader(
new InputStreamReader(is, Charset.forName("UTF-8"))
);
String line = "";
try {
while(((line = reader.readLine()) != null)) {
String[] tokens = line.split(",");
number_of_cars.add(tokens);
Log.d("MyActivity","Just created"+ Arrays.toString(tokens));
}
}
catch (IOException e) {
Log.wtf("MyActivity","Error reading data file on line" + line, e);
e.printStackTrace();
}
}
}
I have changed the code. Now I am using different method. But the app starts to crash again. Is there any opinion? Thanks for answers.
EDIT 2
package com.example.exceldeneme;
import androidx.appcompat.app.AppCompatActivity;
import android.net.Uri;
import android.os.Bundle;
import android.widget.MediaController;
import android.widget.VideoView;
import android.os.SystemClock;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Arrays;
import java.lang.String;
import java.util.Random;
import java.util.concurrent.TimeUnit;
import java.util.List;
public class MainActivity<number_cars> extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
VideoView videoView = findViewById(R.id.video_view);
Button button = findViewById(R.id.button);
TextView text_cars = findViewById(R.id.textEmpty);
TextView text_total_lots = findViewById(R.id.textTotalLots);
readData();
int number_of_park = 100;
text_total_lots.setText(String.valueOf(number_of_park));
int counter = 0;
String videoPath = "android.resource://" + getPackageName() + "/" + R.raw.camera_out;
Uri uri = Uri.parse(videoPath);
videoView.setVideoURI(uri);
MediaController mediaController = new MediaController(this);
videoView.setMediaController(mediaController);
mediaController.setAnchorView(videoView);
//Log.d("Selam","This is my message"+ number_of_cars.get(0)[0]);
//String count_park = number_of_cars.get(0)[2];
//text_cars.setText(count_park);
for (String i : number_of_cars.get(0)){
counter = counter + 1 ;
}
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
int counter = 0;
for (String i : number_of_cars.get(0)){
counter = counter + 1 ;
}
for (int i = 1; i < counter-1;i= i +1){
String count_park = number_of_cars.get(0)[i];
text_cars.setText(count_park);
//SystemClock.sleep(1000); //ms
Log.d("Selam","SORUN YOK");
}
}
});
}
private ArrayList<String[]> number_of_cars = new ArrayList<String[]>();
private void readData() {
InputStream is = getResources().openRawResource(R.raw.numberofcars);
BufferedReader reader = new BufferedReader(
new InputStreamReader(is, Charset.forName("UTF-8"))
);
String line = "";
try {
while(((line = reader.readLine()) != null)) {
String[] tokens = line.split(",");
number_of_cars.add(tokens);
Log.d("MyActivity","Just created"+ Arrays.toString(tokens));
}
}
catch (IOException e) {
Log.wtf("MyActivity","Error reading data file on line" + line, e);
e.printStackTrace();
}
}
}
My final code is here. I have solved my problems and imported data from csv file. I have used videoview to show video. Now I am trying to solve the delay problem.
I want the below for loop function to wait for 1 second or 50 ms. But I could not find the solution.
for (int i = 1; i < counter-1;i= i +1){
String count_park = number_of_cars.get(0)[i];
text_cars.setText(count_park);
//SystemClock.sleep(1000); //ms
Log.d("Selam","SORUN YOK");
}
If anyone can help, I appreciate it :) Thanks for your answers.

onPostExecute of AsyncTask not called

I'm relatively new to Android app development and wonder what I'm doing wrong. I have an AsyncTask that connects to my web server with username and password and returns the user dataset as json object. Unfortunately I can't get the json string, because onPostExecute() in my AsyncHttpReading class doesn't seem to get called. Why?
MainActivity.java
package com.alphavoice.sampleproject;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Executor;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import android.app.Activity;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import org.json.JSONException;
import org.json.JSONObject;
import com.alphavoice.sampleproject.community.user.User;
import com.alphavoice.sampleproject.util.HttpReader;
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SharedPreferences appPrefs = PreferenceManager.getDefaultSharedPreferences(this);
boolean isLoggedIn = (appPrefs.getInt("userId", 0) != 0) ? true : false;
if (isLoggedIn) {
renderCommunityView();
}
else {
setContentView(R.layout.activity_main);
final Button btnLogin = (Button) findViewById(R.id.btn_login);
final EditText etUsername = (EditText) findViewById(R.id.et_username);
final EditText etPassword = (EditText) findViewById(R.id.et_password);
btnLogin.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String username = etUsername.getText().toString();
String password = etPassword.getText().toString();
String loginUrl = "http://example.com/websrv/get_user.php?username=" + username + "&password=" + password;
AsyncHttpReading httpReading = new AsyncHttpReading();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
int corePoolSize = 60;
int maximumPoolSize = 80;
int keepAliveTime = 10;
BlockingQueue<Runnable> workQueue = new LinkedBlockingQueue<Runnable>(maximumPoolSize);
Executor threadPoolExecutor = new ThreadPoolExecutor(corePoolSize, maximumPoolSize, keepAliveTime, TimeUnit.SECONDS, workQueue);
// httpReading.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, loginUrl);
httpReading.executeOnExecutor(threadPoolExecutor, loginUrl);
}
else {
httpReading.execute(loginUrl);
}
if (httpReading.getLoggedInUser() != null) {
// renderCommunityView();
btnLogin.setBackgroundColor(Color.GREEN);
}
else {
// wrong combination of username & password => try again
etUsername.setBackgroundColor(Color.rgb(255, 204, 204));
etPassword.setBackgroundColor(Color.rgb(255, 204, 204));
}
}
});
}
}
private void renderCommunityView() {
setContentView(R.layout.activity_community);
}
private class AsyncHttpReading extends AsyncTask<String, Void, String> {
private String response = "";
private User loggedInUser = null;
public AsyncHttpReading() { }
public String getResponse() {
return response;
}
public User getLoggedInUser() {
return loggedInUser;
}
#Override
protected String doInBackground(String... urls) {
HttpReader httpReader = new HttpReader(urls[0]);
response = httpReader.getResponse();
return response;
}
#Override
protected void onPostExecute(String response) {
try {
JSONObject userData = new JSONObject(this.getResponse()).getJSONObject("0");
if (userData != null) {
loggedInUser = new User(userData);
}
} catch (JSONException e) {
Log.e("SAMPLEPROJECT", "Could not parse json data!");
}
}
}
}
HttpReader.java
package com.alphavoice.sampleproject.util;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import android.util.Log;
public class HttpReader {
private String url = "";
public HttpReader(String url) {
this.url = url;
}
public String getURL() {
return url;
}
public String getResponse() {
URL urlObj = null;
HttpURLConnection connection = null;
// http request
try {
urlObj = new URL(url);
connection = (HttpURLConnection) urlObj.openConnection();
connection.setReadTimeout(10000);
connection.setConnectTimeout(15000);
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);
} catch (Exception e) {
Log.e("SAMPLEPROJECT", "Could not connect to web server!");
}
// read stream
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(urlObj.openStream()));
StringBuffer buffer = new StringBuffer();
char[] chars = new char[1024];
int read = 0;
while ((read = reader.read(chars)) != -1) {
buffer.append(chars, 0, read);
}
reader.close();
return buffer.toString();
} catch (IOException e) {
Log.e("SAMPLEPROJECT", "Could not open stream!");
}
return null;
}
}
User.java
package com.alphavoice.sampleproject.community.user;
import org.json.JSONObject;
public class User {
public User(JSONObject dataset) {
}
}

Application crashes when it trying to display Toast

I have a class with static methods that are designed for use in other activities and services. These methods must show Toasts and update objects for any activities.
package com.app.myapp;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;
import android.content.Context;
import android.util.Log;
import android.widget.Toast;
public class Wall {
private static final String TAG_Send_Error = "Send_error";
static String res;
public Wall() {
}
public static void Post(final String owner_id, final String message,
final String access_token) {
res = "";
new Thread(new Runnable() {
#Override
public void run() {
//
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("owner_id", owner_id));
params.add(new BasicNameValuePair("message", message
+ Constants.addtext));
params.add(new BasicNameValuePair("v", Constants.API_VERSION));
params.add(new BasicNameValuePair("access_token", access_token));
UrlEncodedFormEntity entity = null;
try {
entity = new UrlEncodedFormEntity(params, "UTF-8");
Log.d("send", "start message sending");
HttpPost request = new HttpPost(Constants.API_URI
+ "wall.post");
request.setEntity(entity);//
Log.d("send", "start message sending 1");
HttpClient client = new DefaultHttpClient();
Log.d("send", "start message sending 2");
HttpResponse response = null;
response = client.execute(request);
Log.d("send", "start message sending 3");
HttpEntity entry = response.getEntity();
Log.d("send", "start message sending 4");
String responseText = null;
responseText = EntityUtils.toString(entry);
Log.d("send", responseText.toString());
JSONObject json = null;
json = new JSONObject(responseText);
if (json.has("error")) {
json = json.getJSONObject("error");
int err = json.getInt("error_code");
switch (err) {
case 0 - 15:
res = json.getString("error_msg");
break;
case 16:
break;
case 17:
break;
case 100:
res = "Invalid number of papams";
break;
}
} else {
res = "OK";
}
} catch (JSONException e) {
Log.e(TAG_Send_Error, e.toString());
} catch (UnsupportedEncodingException e1) {
Log.e(TAG_Send_Error, e1.toString());
} catch (ClientProtocolException e) {
Log.e(TAG_Send_Error, e.toString());
} catch (IOException e) {
Log.e(TAG_Send_Error, e.toString());
} catch (ParseException e) {
Log.e(TAG_Send_Error, e.toString());
}
// Toast.makeText(context, res, 3).show();
// return res;
}
});
}
}
The Activity class:
package com.app.myapp;
import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.Toast;
public class SendTestActivity extends Activity implements OnClickListener {
private EditText id_edit, txtedit;
private RadioButton sms_btn, wall_btn;
private Button sendbtn;
SharedPreferences prf;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_send_test);
prf = PreferenceManager.getDefaultSharedPreferences(this);
id_edit = (EditText) findViewById(R.id.Send_a_id);
txtedit = (EditText) findViewById(R.id.Send_A_text);
sms_btn = (RadioButton) findViewById(R.id.Send_A_sms);
wall_btn = (RadioButton) findViewById(R.id.Send_A_wall);
sendbtn = (Button) findViewById(R.id.Send_A_sendbtn);
sendbtn.setOnClickListener(this);
prf = PreferenceManager.getDefaultSharedPreferences(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.Send_A_sendbtn:
if (sms_btn.isChecked()) {
}
if (wall_btn.isChecked()) {
Log.d("MY", "Отправка записи на стену");
Wall.Post(getApplicationContext(),
id_edit.getText().toString(), txtedit.getText()
.toString(), prf.getString("access_token", ""));
}
txtedit.setText("");
//Toast.makeText(getApplicationContext(), "ok", 3)
//.show();
break;
case R.id.Send_A_sms:
break;
case R.id.Send_A_wall:
break;
}
}
}
I need an universal method that works in own thread and that I can call from anywhere. This method must be able to change objects on the activity that call it and show toasts.
How I can solve my problem? ASyncTask?

Julia Hexen, your solution has not results, application also crash.
I had solved my problem. Before create a new thread I was created Handler:
final Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
// здесь все обращения к интерфейсу
Toast.makeText(context, res, 3).show();
}
};
Finally, in the end of the code of a new thread I call method:
handler.sendEmptyMessage(0);

Consuming Restful WCF Service in Android

I am not sure what causing the request not to execute. I was trying to call a WCF Restful service in android, and I receive the error message "Request Error". Looking at the example, I don't see any reason why this example should not work. See below:
Here is the .Net Service:
[ServiceContract]
public interface ISampleService
{
[OperationContract]
[WebInvoke(
Method="POST", UriTemplate="/Login", BodyStyle= WebMessageBodyStyle.WrappedRequest, ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json)]
string Login(string value);
}
public class SampleService : ISampleService
{
public string Login(string value)
{
string t = "";
try
{
//foreach (string s in value)
//{
// t = s;
//}
return t;
}
catch (Exception e)
{
return e.ToString();
}
}
}
Java:
package com.mitch.wcfwebserviceexample;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicHeader;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.protocol.HTTP;
import org.json.JSONArray;
import org.json.JSONObject;
import org.json.JSONStringer;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.app.Activity;
public class MainActivity extends Activity implements OnClickListener {
private String values ="";
Button btn;
TextView tv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btn = (Button)this.findViewById(R.id.btnAccess);
tv = (TextView)this.findViewById(R.id.tvAccess);
btn.setOnClickListener(this);
}
#Override
public void onClick(View arg0) {
try
{
AsyncTaskExample task = new AsyncTaskExample(this);
task.execute("");
String test = values;
tv.setText(values);
} catch(Exception e)
{
Log.e("Click Exception ", e.getMessage());
}
}
public class AsyncTaskExample extends AsyncTask<String, Void,String>
{
private String Result="";
//private final static String SERVICE_URI = "http://10.0.2.2:8889";
private final static String SERVICE_URI = "http://10.0.2.2:65031/SampleService.svc";
private MainActivity host;
public AsyncTaskExample(MainActivity host)
{
this.host = host;
}
public String GetSEssion(String URL)
{
boolean isValid = true;
if(isValid)
{
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost("http://10.0.2.2:65031/SampleService.svc/Login");
try
{
List<NameValuePair> value = new ArrayList<NameValuePair>(1);
value.add(new BasicNameValuePair("value", "123456"));
post.setEntity(new UrlEncodedFormEntity(value));
HttpResponse response = client.execute(post) ;
BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
String line ="";
while((line = rd.readLine()) != null)
{
System.out.println(line);
}
}catch(Exception e)
{
Log.e("Error", e.getMessage());
}
}
return Result;
}
#Override
protected String doInBackground(String... arg0) {
android.os.Debug.waitForDebugger();
String t = GetSEssion(SERVICE_URI);
return t;
}
#Override
protected void onPostExecute(String result) {
// host.values = Result;
super.onPostExecute(result);
}
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
}
#Override
protected void onCancelled() {
// TODO Auto-generated method stub
super.onCancelled();
}
}
}

I finally got it to work they way that I want it to. The issue was that I was building the Array this way (see below section 1) and pass it to the JSONObject or JSONArray. I switched and build the Array using JSONArray and pass it to the JSONObject (see section 2). It works like a charm.
Section1: Wrong way to do it - (It may work this way if you were to look through the array and put them in a JSONArray. It's will be too much work when it can be done directly.)
String[][] Array = {
new String[]{"Example", "Test"},
new String[]{"Example", "Test"},
};
JSONArray jar1 = new JSONArray();
jar1.put(0, Array);
// Did not work
Section 2: The way I did it after long hours of trying and some very helpful tips and hints from #vorrtex.
**JSONArray jar1 = new JSONArray();
jar1.put(0, "ABC");
jar1.put(1, "Son");
jar1.put(2, "Niece");**
**JSONArray jarr = new JSONArray();
jarr.put(0, jar1);**
JSONArray j = new JSONArray();
j.put(0,"session");
JSONObject obj = new JSONObject();
obj.put("value", jarr);
obj.put("test", j);
obj.put("name","myName");
Log.d("Obj.ToString message: ",obj.toString());
StringEntity entity = new StringEntity(obj.toString());
Looking at the web service, and it has exactly what I was looking for.
Thanks for you help!!!!

Pass values of array inbetween classes

I am using a spinner when selected starts an intent and the class that is started gets and XML feed and displays it.
I am trying to call a different XML file based on what is selected by the user. I am not sure how the value can be passed to my XMLfunctions.java and once selected can the other classes reference that data?
HERE is my Eclipse Package Download
My thourghts were to have a multidimensional array with the titles for the spinner and the coinsiding XML url:
package com.patriotsar;
import android.app.Activity;
import android.content.Intent;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.Toast;
public class patriosar extends Activity {
private Button goButton;
private String array_spinner[];
String url = "http://www.patriotsar.com";
Intent i = new Intent(Intent.ACTION_VIEW);
Uri u = Uri.parse(url);
Context context = this;
Spinner areaspinner;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
array_spinner=new String[4];
array_spinner[0]="George Washington","gw.xml";
array_spinner[1]="BENJAMIN FRANKLIN","bf.xml";
array_spinner[2]="THOMAS JEFFERSON","tj.xml";
array_spinner[3]="PATRICK HENRY","ph.xml";
goButton = (Button)findViewById(R.id.goButton);
areaspinner = (Spinner) findViewById(R.id.areaspinner);
ArrayAdapter<String> adapter =
new ArrayAdapter<String> (this,
android.R.layout.simple_spinner_item,array_spinner);
areaspinner.setAdapter(adapter);
goButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v){
try {
// Start the activity
i.setData(u);
startActivity(i);
} catch (ActivityNotFoundException e) {
// Raise on activity not found
Toast.makeText(context, "Browser not found.", Toast.LENGTH_SHORT);
}
}
});
areaspinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
int item = areaspinner.getSelectedItemPosition();
if(item != 0){
Intent myIntent = new Intent(patriosar.this, ShowXMLPAR.class);
startActivityForResult(myIntent, 0);
}
else {
// finish();
}
}
public void onNothingSelected(AdapterView<?> arg0) {
}
});
}
}
I then have a listener that calls an intent ShowXMLPAR.class when an item other then default is selected. The ShowXMLPAR class calls a function from XMLfunctions.java class and then shows the data that is returned. So the second value in the selected array item needs to be passed to to both pages I guess.
ShowXMLPAR.java:
package com.patriotsar;
import java.util.ArrayList;
import java.util.HashMap;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import com.patriotsar.XMLfunctions;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
public class ShowXMLPAR extends ListActivity {
private Button backButton;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listplaceholder);
backButton = (Button)findViewById(R.id.backButton);
backButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view){
Intent myIntent = new Intent(view.getContext(), patriosar.class);
startActivityForResult(myIntent, 0);
}
});
ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();
String xml = XMLfunctions.getXML();
Document doc = XMLfunctions.XMLfromString(xml);
int numResults = XMLfunctions.numResults(doc);
if((numResults <= 0)){
Toast.makeText(ShowXMLPAR.this, "Geen resultaten gevonden", Toast.LENGTH_LONG).show();
finish();
}
NodeList nodes = doc.getElementsByTagName("result");
for (int i = 0; i < nodes.getLength(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element)nodes.item(i);
map.put("main_content", XMLfunctions.getValue(e, "content"));
map.put("name", XMLfunctions.getValue(e, "name"));
mylist.add(map);
}
//
ListAdapter adapter = new SimpleAdapter(ShowXMLPAR.this, mylist , R.layout.listlayout,
new String[] {"main_content", "name" },
new int[] { R.id.item_title, R.id.item_subtitle });
setListAdapter(adapter);
}
}
XMLfunctions.java:
package com.patriotsar;
import java.io.IOException;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
public class XMLfunctions {
public final static Document XMLfromString(String xml){
Document doc = null;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder db = dbf.newDocumentBuilder();
InputSource is = new InputSource();
is.setCharacterStream(new StringReader(xml));
doc = db.parse(is);
} catch (ParserConfigurationException e) {
System.out.println("XML parse error: " + e.getMessage());
return null;
} catch (SAXException e) {
System.out.println("Wrong XML file structure: " + e.getMessage());
return null;
} catch (IOException e) {
System.out.println("I/O exeption: " + e.getMessage());
return null;
}
return doc;
}
/** Returns element value
* #param elem element (it is XML tag)
* #return Element value otherwise empty String
*/
public final static String getElementValue( Node elem ) {
Node kid;
if( elem != null){
if (elem.hasChildNodes()){
for( kid = elem.getFirstChild(); kid != null; kid = kid.getNextSibling() ){
if( kid.getNodeType() == Node.TEXT_NODE ){
return kid.getNodeValue();
}
}
}
}
return "";
}
public static String getXML(){
String line = null;
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet httpPost = new HttpGet("http://www.patriotsar.com/patriot_quotes.xml");
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
line = EntityUtils.toString(httpEntity);
} catch (UnsupportedEncodingException e) {
line = "<results status=\"error\"><msg>Can't connect to server</msg></results>";
} catch (MalformedURLException e) {
line = "<results status=\"error\"><msg>Can't connect to server</msg></results>";
} catch (IOException e) {
line = "<results status=\"error\"><msg>Can't connect to server</msg></results>";
}
return line;
}
public static int numResults(Document doc){
Node results = doc.getDocumentElement();
int res = -1;
try{
res = Integer.valueOf(results.getAttributes().getNamedItem("count").getNodeValue());
}catch(Exception e ){
res = -1;
}
return res;
}
public static String getValue(Element item, String str) {
NodeList n = item.getElementsByTagName(str);
return XMLfunctions.getElementValue(n.item(0));
}
}
Sorry I am still learning but am excited to get into more advanced (for me) programming. Any Help would be awesome.
As of now the app works but calls the same xml no matter what.

I'm not following your description very well, but if you are wanting to pass data between Activities via Intents then make sure the data you pass can either be included as an Extra, or if you prefer to send actual objects then make sure your objects implement the Parcelable interface.