This is my main activity which gets a json array from a URL. My problem is that when I try and Unit test what should be in the textview it gives me a null pointer exeption.
public class MainActivity extends AppCompatActivity {
TextView txtJson;
ProgressDialog pd;
public static TextView testString;
String jsonString = null;
List<Location> locations;`enter code here`
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txtJson = (TextView) findViewById(R.id.tvJsonItem);
testString = (TextView) findViewById(R.id.test_for_string);
new JsonTask().execute("https://wsu-dining-service.s3.amazonaws.com/current-menu.json");
}
protected void postCreate()
{
mapStrinToClass();
testString.setText(locations.get(0).getName());
}
private void mapStrinToClass()
{
ObjectMapper objectMapper = new ObjectMapper();
JsonFactory jsonFactory = objectMapper.getFactory();
try {
JsonParser jsonParser = jsonFactory.createParser(jsonString);
locations = objectMapper.readValue(jsonString,
new TypeReference<List<Location>>() {
});
} catch (IOException e) {
e.printStackTrace();
}
}
private class JsonTask extends AsyncTask<String, String, String> {
protected void onPreExecute() {
super.onPreExecute();
pd = new ProgressDialog(MainActivity.this);
pd.setMessage("Please wait");
pd.setCancelable(false);
pd.show();
}
protected String 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+"\n");
Log.d("Response: ", "> " + line); //here u ll get whole response...... :-)
}
return buffer.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException 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(String result) {
super.onPostExecute(result);
if (pd.isShowing()){
pd.dismiss();
}
jsonString = result;
postCreate();
}
}
}
My unit test
* When I run the app the textview is populated with "Tim & Jeanne's Dining Commons" but the test fails and says the testString.getText().toString(); is null
#Test
public void isMenuCorrect() {
String menuTxt = MainActivity.testString.getText().toString();
assert(menuTxt == "Tim & Jeanne's Dining Commons");
}
First of all, you should use Espresso to run UI tests, under the androidTest folder. Example:
onView(allOf(withId(R.id.tvJsonItem), withText("Tim & Jeanne's Dining Commons")).check(matches(isDisplayed()));
Basically what we're doing here is checking if a view with id R.id.tvJsonItem and with a text "Tim & Jeanne's Dining Commons" is displayed on the screen. Now how to run Espresso tests is not in this question's scope.
Second, your production code should never know what's going on in the tests, like you have created a TextView just to be used in your unit tests.
Finally, never have static references to your views since you can't guarantee your activity has been created by the time you try to access them. In fact, a view should only be seen by its parent. In your case, the reference TextView should be private in your activity.
Related
I had wrote a code which use a parse to catch some data from a JSON file but i don't know what kind of structure is better between the sparse array or the array map for memorise these data ?
I had used a array map but I don't know if it's too wasted on so little data data.
public class MainActivity extends AppCompatActivity {
private ProgressDialog pd;
private String TAG = MainActivity.class.getSimpleName();
public ArrayMap<Integer, ValoriDiSueg> ArrayDati = new ArrayMap<>();
Button buttonProg;
TextView textViewProg;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
buttonProg = (Button) findViewById(R.id.button);
textViewProg = (TextView) findViewById(R.id.textView);
buttonProg.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
new JsonCLASS().execute("https://samples.openweathermap.org/data/2.5/weather?q=London,uk&appid=b6907d289e10d714a6e88b30761fae22");
}
});
}
private class JsonCLASS extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pd = new ProgressDialog(MainActivity.this);
pd.setMessage("Please wait");
pd.setCancelable(false);
pd.show();
}
#Override
protected String 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 + "\n");
Log.d("Response: ", "> " + line); //here u ll get whole response...... :-)
}
return buffer.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.disconnect();
}
try {
if (reader != null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
The parse of these data
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
try {
JSONObject jsonObject = new JSONObject(result);
JSONArray Arr = new JSONArray(jsonObject.getString("weather"));
for (int i = 0; i < Arr.length(); i++){
JSONObject jsonPart = Arr.getJSONObject(i);
ArrayDati.put(i,new ValoriDiSueg( jsonPart.getString("main"), jsonPart.getString("description")));
//ArrayDati.put(i,new ValoriDiSueg("description : "+ jsonPart.getString("description")));
textViewProg.setText(textViewProg.getText()+"main : "+ ArrayDati.get(i).Main +"\n"+textViewProg.getText()+"description : "+ ArrayDati.get(i).Description );
}
} catch (Exception e ){
e.printStackTrace();
}
if (pd.isShowing()) {
pd.dismiss();
}
}
}
}
And I created a class:
public class ValoriDiSueg {
String Main;
String Description;
public ValoriDiSueg(String main, String description) {
this.Main = main;
this.Description = description;
}
}
any suggestions??
In simple:
If your key is int or long, you should use SparseArray, SparseLongArray as it will not boxing/un-boxing the key value when operates. Also, it provides similar classes for int/long values as long as the key is int/long.
If you key is not int nor long, such as an object or String, you should use ArrayMap instead as it will handle the conflicts of key hashes.
There are no much performance and memory usage difference between these two class as they are all requires O(log n) to search and O(n) to insert/delete (in most cases).
i am using simple asynctask function for getting values from mysql database through json.it was working fine with emulator but if i am trying from the mobile i am getting error. like Java.lang.NullPointerExceprtion:Attempt to invke virtual metho 'java.lang.string.java.lang.stringbuilder.toString() on a null object reference.
I tried with new project but result is same. this application is not working in all the devices except emulator. can you help me on this.
My Code is -
public class MainActivity extends AppCompatActivity {
private static final String Latest_Products7 = "Questions";
JSONArray productsArray7 = null;
public static final int CONNECTION_TIMEOUT7=100000;
public static final int READ_TIMEOUT7=150000;
HashMap<String,ArrayList<WorldPopulation>> hasmap = new HashMap<String,ArrayList<WorldPopulation>>();
ArrayList<WorldPopulation> arraylist7 = null;
StringBuilder result7;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new AsyncLogin7().execute();
}
private class AsyncLogin7 extends AsyncTask<String, String, StringBuilder> {
ProgressDialog pdLoading = new ProgressDialog(MainActivity.this);
HttpURLConnection conn7;
URL url7 = null;
#Override
protected void onPreExecute() {
super.onPreExecute();
pdLoading.setMessage("\tLoading...");
pdLoading.setCancelable(false);
pdLoading.show();
}
#Override
protected StringBuilder doInBackground(String... params) {
try {
// Enter URL address where your php file resides
url7 = new URL("http:/Samplesite/****/somephp.php");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
// Setup HttpURLConnection class to send and receive data from php and mysql
conn7 = (HttpURLConnection)url7.openConnection();
conn7.setReadTimeout(READ_TIMEOUT7);
conn7.setConnectTimeout(CONNECTION_TIMEOUT7);
conn7.setRequestMethod("POST");
// setDoInput and setDoOutput method depict handling of both send and receive
conn7.setDoInput(true);
conn7.setDoOutput(true);
// Append parameters to URL
Uri.Builder builder7 = new Uri.Builder().appendQueryParameter("reg_id", "hai") ;
String query7 = builder7.build().getEncodedQuery();
// Open connection for sending data
OutputStream os7 = conn7.getOutputStream();
BufferedWriter writer7 = new BufferedWriter(new OutputStreamWriter(os7, "UTF-8"));
writer7.write(query7);
writer7.flush();
writer7.close();
os7.close();
conn7.connect();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
int response_code7 = conn7.getResponseCode();
// Check if successful connection made
if (response_code7 == HttpURLConnection.HTTP_OK) {
// Read data sent from server
InputStream input7 = conn7.getInputStream();
BufferedReader reader7 = new BufferedReader(new InputStreamReader(input7));
result7 = new StringBuilder();
String line7;
while ((line7 = reader7.readLine()) != null) {
result7.append(line7);
}
// Pass data to onPostExecute method
}
} catch (IOException e) {
e.printStackTrace();
} finally {
conn7.disconnect();
}
return result7;
}
#Override
protected void onPostExecute(StringBuilder result7) {
super.onPostExecute(result7);
Log.e("dai",result7.toString());
Toast.makeText(MainActivity.this,result7.toString(),Toast.LENGTH_LONG).show();
pdLoading.dismiss();
/* Intent intnt = new Intent(Checklist_activity.this,Task_main.class);
intnt.putExtra("task",hasmap);
startActivity(intnt);*/
}
}
}
Change
try {
int response_code7 = conn7.getResponseCode();
// Check if successful connection made
if (response_code7 == HttpURLConnection.HTTP_OK) {
// Read data sent from server
InputStream input7 = conn7.getInputStream();
BufferedReader reader7 = new BufferedReader(new InputStreamReader(input7));
result7 = new StringBuilder();
String line7;
while ((line7 = reader7.readLine()) != null) {
result7.append(line7);
}
// Pass data to onPostExecute method
}
} catch (IOException e) {
e.printStackTrace();
} finally {
conn7.disconnect();
}
return result7;
To
try {
int response_code7 = conn7.getResponseCode();
result7 = new StringBuilder();
// Check if successful connection made
if (response_code7 == HttpURLConnection.HTTP_OK) {
// Read data sent from server
InputStream input7 = conn7.getInputStream();
BufferedReader reader7 = new BufferedReader(new InputStreamReader(input7));
String line7;
while ((line7 = reader7.readLine()) != null) {
result7.append(line7);
}
// Pass data to onPostExecute method
}
} catch (IOException e) {
e.printStackTrace();
} finally {
conn7.disconnect();
}
return result7;
Try something like this
Log.e("dai",MainActivity.this.result7.toString());
Toast.makeText(MainActivity.this,MainActivity.this.result7.toString(),Toast.LENGTH_LONG).show();
OR
#Override
protected void onPostExecute(StringBuilder result) {
super.onPostExecute(result);
Log.e("dai",result.toString());
Toast.makeText(MainActivity.this,result.toString(),Toast.LENGTH_LONG).show();
pdLoading.dismiss();
/* Intent intnt = new Intent(Checklist_activity.this,Task_main.class);
intnt.putExtra("task",hasmap);
startActivity(intnt);*/
}
}
I'm following this tutorial about Rest API in android. I did everything what was in this video and I'm not getting any data, aslo I've changed the link as shown in but I'm not getting any data. Here is my code:
public class MainActivity extends AppCompatActivity {
private TextView value;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
value = (TextView) findViewById(R.id.textView);
Button btn = (Button) findViewById(R.id.button);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
new JSONTask().execute("https://jsonparsingdemo-cec5b.firebaseapp.com/jsonData/moviesDemoItem.txt");
}
});
}
public class JSONTask extends AsyncTask<String, String, String>{
#Override
protected String doInBackground(String... urls) {
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
URL url = new URL(urls[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);
}
// to bedzie wyswietlone
String finalJson = buffer.toString();
JSONObject parentObject = new JSONObject(finalJson);
JSONArray parrentArray = parentObject.getJSONArray("movies");
JSONObject finalObject = parrentArray.getJSONObject(0);
String movieName = finalObject.getString("movie");
int movieYear = finalObject.getInt("year");
return movieName;
}catch (MalformedURLException e){
e.printStackTrace();
} catch (IOException 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(String result) {
super.onPostExecute(result);
value.setText(result);
}
}
}
I'm beginner in android, please don't say that I should start with something easier. I'm doing it for my Django project, I want to create mobile app for it. Thanks a lot for help!
Hiiii, i have checked your code and there is a issue because "https" connection.
You can use Volley library for that. Use below code for get response from yout api link.
Firstly add compile ‘com.mcxiaoke.volley:library-aar:1.0.0’ in yout build.gradle file.
now add below code in your activity
JsonObjectRequest jsonObjectRequest = new
JsonObjectRequest(Request.Method.GET, "https://jsonparsingdemo-
cec5b.firebaseapp.com/jsonData/moviesDemoItem.txt", null, new
Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Toast.makeText(MainActivity.this, ""+response,
Toast.LENGTH_SHORT).show();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
RequestQueue requestQueue =
Volley.newRequestQueue(getApplicationContext());
requestQueue.add(jsonObjectRequest);
I am trying to parse some data using JSoup, this is all happening in a asynctask (doInBackground) part of my MainActivity.
Unfortunately all the elements (9) are empty when I execute the app.
When I debug below codeline, I actually get the complete website, it`s all there.
The method readMultipleLinesRespone() is located in another class HttpUtility where I also call my Post and Get requests.
I tested this upfront by saving the website as a file and using JSoups assets ability, it worked perfectly then.
The setupAdapter() method in onPostExecute fills a ExpandableListview with data, should this info be nessecary. If you need more info pls ask.
Can somebody assist and tell me what I am doing wrong?
response1 = util.readMultipleLinesRespone(); <--- debugged and all data (seems) to be there but isn`t.
Edit: If I print response1, there is indeed no data to parse.
Logcat output:
E/Resonse:: [Ljava.lang.String;#3d3410a
Below is the method readMultipleLinesRespone from HttpUtility class:
public String[] readMultipleLinesRespone() throws IOException {
InputStream inputStream = null;
if (httpConn != null) {
inputStream = httpConn.getInputStream();
} else {
throw new IOException("Connection is not established.");
}
BufferedReader reader = new BufferedReader(new InputStreamReader(
inputStream));
List<String> response = new ArrayList<String>();
String line = "";
while ((line = reader.readLine()) != null) {
response.add(line);
}
reader.close();
return (String[]) response.toArray(new String[0]);
}
The asynctask where it`s all hapening:
private class FetchWebsiteData extends AsyncTask<Void, Void, Void> {
ProgressDialog mProgressDialog;
#Override
protected void onPreExecute() {
this.mProgressDialog = new ProgressDialog(getActivity());
mProgressDialog.setMessage("Laden...");
mProgressDialog.setIndeterminate(false);
mProgressDialog.show();
}
#Override
protected Void doInBackground(Void... result) {
try {
util.sendGetRequest("https://mobile.somesite.nl/Data", null);
response1 = util.readMultipleLinesRespone();
} catch (IOException e) {
e.printStackTrace();
}
if (response1.length > 0) {
Document doc = Jsoup.parse(response1.toString());
// Get the html document title
Elements els = doc.select("span[class=item-value pull-right]");
if (els.size() > 0) {
fac_naam = els.get(0).text();
fac_straat = els.get(1).text();
fac_post = els.get(2).text();
con_tel = els.get(3).text();
con_email = els.get(4).text();
betaal_reknr = els.get(5).text();
betaal_houd = els.get(6).text();
zig_gebruiker = els.get(7).text();
zig_wacht = els.get(8).text();
}
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPreExecute();
setupAdapter();
mProgressDialog.dismiss();
}
}
In the meantime I solved the problem.
I did not pass the response string correctly to the asynctask which parses the required elements.
Just required a public string in which the response is being set and passed (not an elegant way but it works):
public static String HttpResponse = "";
In the HttpUtility class:
public String[] readMultipleLinesRespone() throws IOException {
...
TabFragment1.HttpResponse = response.toString();
...
return (String[]) response.toArray(new String[0]);
}
Then pass it to the asynctask:
#Override
protected Void doInBackground(Void... result) {
try {
util.sendGetRequest(LoginActivity.PersData_URL, null);
util.readMultipleLinesRespone();
} catch (IOException e) {
e.printStackTrace();
}
if (HttpResponse.length() > 0) {
Document doc = Jsoup.parse(HttpResponse.toString());
// Get the html document title
Elements els = doc.select("span[class=item-value pull-right]");
...
}
return null;
}
I am new to android and am completely puzzled by AsyncTasks. I need to create a leaderboard which will pull global leaderboard scores from a server.
I have posted below the two methods that were created in the LeaderboardsFragment which are used to access and display the scores - getGlobalScores and readStream.
I am unsure of how to use these in the AsyncTask - mostly how and what parameters to pass to the AsyncTask - most of the tutorials I have been looking at do not deal with 2D arrays. Any hints would be really appreciated, I am really having trouble understanding the literature surrounding this.
package uk.ni.appidemic.whackamole;
import java.io.BufferedReader;
public class LeaderboardsFragment extends Fragment {
AssetStore AS;
private TextView TopScores;
private String[][] global_scores = new String[10][3];
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_leaderboards, container, false);
//Go and get the asset store from the activity
AS = WhackAMoleActivity.getAssetManager();
TopScores = (TextView) rootView.findViewById(R.id.leaderboards);
// Extract and display the top score text view from the preferences
displayLocalScores();
// this method is used to send a highscore to the server (name and score)
// this method may get pulled out to the gameloop as its the only place it should be used in the final game
// but this can be used for testing purposes atm (Server needs to be on)
// sendScoreGlobal("porter", 1001);
//async Get global scores from the server and display them - new thread
new AsyncOperation().execute();
...................
public void getGlobalScores() {
//gets global score in HTML format to be parsed
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
try {
URL url = new URL("http://62........./high_scores");
HttpURLConnection con = (HttpURLConnection) url.openConnection();
readStream(con.getInputStream());
} catch (Exception e) {
e.printStackTrace();
}
}
/gets the data and stores the global scores in a 2d array
//it then displays to screen
public void readStream(InputStream in) {
BufferedReader reader = null;
try {
StringBuilder htmlIn = new StringBuilder();
StringBuilder globalScoreBuilder = new StringBuilder();
htmlIn.append("");
reader = new BufferedReader(new InputStreamReader(in));
String line = "";
while ((line = reader.readLine()) != null) {
htmlIn.append(line);
}
// String to be scanned to find the pattern.
String html = htmlIn.toString();
String regexPattern = "<td align=\"left\" style=\"padding-left:10px;\">(\\d+?)</td>|<td align=\"right\" style=\"padding-right:10px;\">(\\w+?)</td>";
// Create a Pattern object
Pattern patternObject = Pattern.compile(regexPattern);
// Now create matcher object.
Matcher matcherObject = patternObject.matcher(html);
Log.d(getActivity().getResources().getString(R.string.LOG_TAG), "Trying to find regex matches");
TopScores.append("\n");
int nextFreePointer = 0;
int rowCount = 0;
while (matcherObject.find()) {
if (matcherObject.group(1) != null) {
Log.d(getActivity().getResources().getString(R.string.LOG_TAG), "Regex match : " + matcherObject.group(1));
globalScoreBuilder.append(matcherObject.group(1) + " ");
global_scores[rowCount][nextFreePointer] = matcherObject.group(1);
nextFreePointer++;
}
if (matcherObject.group(2) != null) {
Log.d(getActivity().getResources().getString(R.string.LOG_TAG), "Regex match : " + matcherObject.group(2));
globalScoreBuilder.append(matcherObject.group(2) + " ");
global_scores[rowCount][nextFreePointer] = matcherObject.group(2);
nextFreePointer++;
}
if (nextFreePointer > 2) {
nextFreePointer = 0;
rowCount++;
}
globalScoreBuilder.append("\n");
}
StringBuilder sb = new StringBuilder();
String lineSeparator = System.getProperty("line.separator");
for (String[] row : global_scores) {
sb.append(Arrays.toString(row)).append(lineSeparator);
}
String text = sb.toString();
TopScores.append("Global Top 10 Scores\n");
TopScores.append(text);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
public class AsyncOperation extends AsyncTask<String, Void, Void>{
protected void onPreExecute(){
}//end of onPreExecute
#Override
protected Void doInBackground(Void... values) {
}//doinBackground
protected void onProgressUpdate(Void... values){
}//onProgressUpdate
protected void onPostExecute(Void... result){
}//end of onPostExecute
}//end of AsyncOperation inner class
}//end of Leaderboards class
You should fetch your game score through a WebService class that extentds AsynTask. Below is my class that I am using in order to fetch remote data safely.
CODE:
public class WebServiceRestTask extends AsyncTask<HttpUriRequest, Void, Object> {
private static final String TAG = "WebServiceRestTask";
private AbstractHttpClient mClient;
private WeakReference<WebServiceRestCallback> mCallback;
private int ws_task;
public WebServiceRestTask(int ws_task) {
this(new DefaultHttpClient(), ws_task);
}
public WebServiceRestTask(AbstractHttpClient client, int task_number) {
mClient = client;
this.ws_task = task_number;
}
public interface WebServiceRestCallback {
public void onRequestSuccess(String response);
public void onRequestError(Exception error);
}
public void setResponseCallback(WebServiceRestCallback callback) {
mCallback = new WeakReference<WebServiceRestCallback>(callback);
}
#Override
protected Object doInBackground(HttpUriRequest... params) {
try {
HttpUriRequest request = params[0];
HttpResponse serverResponse = mClient.execute(request);
BasicResponseHandler handler = new BasicResponseHandler();
String response = handler.handleResponse(serverResponse);
return response + ws_task;
} catch (Exception e) {
Log.w(TAG, e);
return e;
}
}
#Override
protected void onPostExecute(Object result) {
if (mCallback != null && mCallback.get() != null) {
if (result instanceof String) {
mCallback.get().onRequestSuccess((String) result);
} else if (result instanceof Exception) {
mCallback.get().onRequestError((Exception) result);
} else {
mCallback.get().onRequestError(
new IOException("Unknown Error Contacting Host"));
}
}
}
}
Not at my workstation but think something like this should work.
public class AsyncOperation extends AsyncTask<String, Void, Void>{
private String[][] global_scores = new String[10][3];
protected void onPreExecute(){
// optionally show loading indicator
TopScores.append("\n");
}//end of onPreExecute
#Override
protected Void doInBackground(Void... values) {
try {
URL url = new URL("http://62........./high_scores");
HttpURLConnection con = (HttpURLConnection) url.openConnection();
readStream(con.getInputStream());
} catch (Exception e) {
e.printStackTrace();
}
}//doinBackground
protected void onProgressUpdate(Void... values){
}//onProgressUpdate
protected void onPostExecute(Void... result){
// optionally hide loading indicator
StringBuilder sb = new StringBuilder();
String lineSeparator = System.getProperty("line.separator");
for (String[] row : global_scores) {
sb.append(Arrays.toString(row)).append(lineSeparator);
}
String text = sb.toString();
TopScores.append("Global Top 10 Scores\n");
TopScores.append(text);
}//end of onPostExecute
private void readStream(InputStream in) {
BufferedReader reader = null;
try {
StringBuilder htmlIn = new StringBuilder();
StringBuilder globalScoreBuilder = new StringBuilder();
htmlIn.append("");
reader = new BufferedReader(new InputStreamReader(in));
String line = "";
while ((line = reader.readLine()) != null) {
htmlIn.append(line);
}
// String to be scanned to find the pattern.
String html = htmlIn.toString();
String regexPattern = "<td align=\"left\" style=\"padding-left:10px;\">(\\d+?)</td>|<td align=\"right\" style=\"padding-right:10px;\">(\\w+?)</td>";
// Create a Pattern object
Pattern patternObject = Pattern.compile(regexPattern);
// Now create matcher object.
Matcher matcherObject = patternObject.matcher(html);
Log.d(getActivity().getResources().getString(R.string.LOG_TAG), "Trying to find regex matches");
int nextFreePointer = 0;
int rowCount = 0;
while (matcherObject.find()) {
if (matcherObject.group(1) != null) {
Log.d(getActivity().getResources().getString(R.string.LOG_TAG), "Regex match : " + matcherObject.group(1));
globalScoreBuilder.append(matcherObject.group(1) + " ");
global_scores[rowCount][nextFreePointer] = matcherObject.group(1);
nextFreePointer++;
}
if (matcherObject.group(2) != null) {
Log.d(getActivity().getResources().getString(R.string.LOG_TAG), "Regex match : " + matcherObject.group(2));
globalScoreBuilder.append(matcherObject.group(2) + " ");
global_scores[rowCount][nextFreePointer] = matcherObject.group(2);
nextFreePointer++;
}
if (nextFreePointer > 2) {
nextFreePointer = 0;
rowCount++;
}
globalScoreBuilder.append("\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}//end of AsyncOperation inner class