Develop Reference

receive response from http android

I want to send a URL such as "http://192.168.1.1/key_on" to an HTML form and then receive a number 1 or 0 as response, if it can changes correctly, then do something in my app. I send my request by AsyncTask, and it works correctly! But I don't know how to get response ?
Here is my some code in Activities:
Button btn= (Button)convertView.findViewById(R.id.two);
btn.setWidth(500);
new RequestTask().execute("http://192.168.1.1/key_on");
btn.setBackgroundColor(Color.parseColor("#FF11AC06"));
btn.setText(childText);
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
int color = Color.TRANSPARENT;
Drawable background = view.getBackground();
if (background instanceof ColorDrawable)
color = ((ColorDrawable) background).getColor();
if (color == Color.parseColor("#FF11AC06")) {
new RequestTask().execute("http://192.168.1.1/key_off");
view.setBackgroundColor(Color.parseColor("#FF41403F"));
} else {
view.setBackgroundColor(Color.parseColor("#FF11AC06"));
new RequestTask().execute("http://192.168.1.1/key_on");
}
}
});
return convertView;
And in RequestTask.java:
class RequestTask extends AsyncTask<String, String, String> {
#Override
protected String doInBackground(String... uri) {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response;
String responseString = null;
try {
response = httpclient.execute(new HttpGet(uri[0]));
StatusLine statusLine = response.getStatusLine();
if(statusLine.getStatusCode() == HttpStatus.SC_OK){
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
responseString = out.toString();
out.close();
} else{
//Closes the connection.
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
} catch (ClientProtocolException e) {
//TODO Handle problems..
} catch (IOException e) {
//TODO Handle problems..
}
return responseString;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
//Do anything with response..
}
}

please check your request url(http://192.168.1.1/key_off) getting 404 error code.please fire your url in web.

Save user variables in sharedpreference and connect class with MainActivity?

I have to hit a service and if the response came true than I have to verify the user & save the user entered variables in shared preference. my url is: http://a.nextput.com/apps/init/4/a/9fe2d2cbaa8332a4633be17b79208181-2y-10-ELVM4HwkaYaCVu6203Zjfus-G/o?aff_id and the response it is giving is {"success":true}. For this I have made a class and declared a static method. Inside the static method I have to do parsing.
my class:
public class InitializeSDK {
/*String json = "";
URL url;
HttpURLConnection connection = null;*/
public static void init(final Context ctx, int offerwall_id, String offerwall_public_key) {
new AsyncTask<Void, Void, Void>() {
protected void onPreExecute() {
super.onPreExecute();
}
protected Void doInBackground(Void... arg0) {
//TODO: add code to read http request and store the json data in json variable
String json = "";
//URL url;
HttpURLConnection connection = null;
InputStream is = null;
final String MyPREFERENCES = "MyPrefs" ;
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("http://a.nextput.com/apps/init/4/a/9fe2d2cbaa8332a4633be17b79208181-2y-10-ELVM4HwkaYaCVu6203Zjfus-G/o?aff_id");//YOUR URL
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
JSONObject jObj = new JSONObject(json);
boolean isSuccess = jObj.getBoolean("success");
System.out.println("success : " + isSuccess);
// SharedPreferences sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);
/*SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(Context ctx);
SharedPreferences.Editor editor = prefs.edit();
editor.putBoolean("isSuccess",isSuccess);
editor.commit();*/
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
/* JSONObject jsonObject = new JSONObject(json);
boolean state = jsonObject.getBoolean("success");*/
return null;
}
protected void onPostExecute(Void result) {
super.onPostExecute(result);
}
}.execute();
}
my MainActivity is:
public class MainActivity extends AppCompatActivity {
final Context context = this;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
}
How to save the variables in sharedpreference and connect the class with MainActivity? Please help

Do the below changes.
Step1: Change Return type Void to Boolean
new AsyncTask<Void, Void, Boolean>() {}
Step2: In doInBackground return "isSuccess"
Step3: Change the onPostExecute() below
protected void onPostExecute(boolean result) {
super.onPostExecute(result);
if(result){
PreferenceManager.getDefaultSharedPreferences(this)
.edit()
.putInt"offerwall_id", offerwall_id)
.putString("offerwall_public_key",offerwall_public_key)
.apply();
}
}
Step4: Call from MainActivity
public class MainActivity extends AppCompatActivity {
final Context context = this;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
InitializeSDK.init(this,val1,val2);
}
}
}

Make InitializeSDK class extend AsyncTask
like
public class InitializeSDK extends AsyncTask<Void, Integer, String> {
Context ctx;
int offerwall_id;
String offerwall_public_key;
public InitializeSDK (Context ctx, int offerwall_id, String offerwall_public_key){
this.ctx = ctx;
this.offerwall_id = offerwall_id;
this.offerwall_public_key = offerwall_public_key;
}
//rest of the asynctask code
}
and in your MainActivity:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
int id = //your id;
String offerwall_public_key = //your key;
new IntializeSDK(this,id,offerwall_public_key).execute();
}
Your shared preference code is correct, use it in OnPostExecute

Splash Screen activity runs twice

So basically this is the class that starts at the launch of the app and it shows a splashscreen while getting a serverList from a server, once it has the list, it starts the next activity, the problem is that this activity seems to be getting called twice before the next activity is started, what could be causing that?
public class SplashScreen extends Activity {
public static DefaultHttpClient httpClient;
private String resp;
static String res;
private String errorMsg;
final Context context = this;
public static String cookieValue;
public static Cookie cookie;
String now_playing, earned;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_splash_screen);
String Wlcclient = "Yes";
String ClientType = "Android";
String Version = "0.103";
new PrefetchData().execute(Wlcclient,ClientType,Version);
}
public static String executeHttpPost(String url, ArrayList<NameValuePair> postParameters) throws Exception {
BufferedReader in = null;
try {
SplashScreen.httpClient = new DefaultHttpClient();
HttpPost request = new HttpPost(url);
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(postParameters);
request.setEntity(formEntity);
HttpResponse response = SplashScreen.httpClient.execute(request);
List<Cookie> cookies = SplashScreen.httpClient.getCookieStore().getCookies();
cookie = cookies.get(0);
cookieValue = "ASPSESSIONIDCQTCRACT=" + cookie.getValue();
System.out.println("COOK" + cookieValue);
Header[] headers = response.getAllHeaders();
System.out.println("length" + headers.length);
for (int i=0; i < headers.length; i++) {
Header h = headers[i];
System.out.println( "Header names: "+h.getName());
System.out.println( "Header Value: "+h.getValue());
}
CookieManager cookieManager = CookieManager.getInstance();
in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer sb = new StringBuffer("");
String line = "";
String NL = System.getProperty("line.separator");
while ((line = in.readLine()) != null) {
sb.append(line + NL);
}
in.close();
String result = sb.toString();
return result;
}
finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
public class PrefetchData extends AsyncTask<String,Void,String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// before making http calls
}
#Override
protected String doInBackground(String... params) {
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("WlcClient",
params[0])); // params[0] contains the first value that you have passed and params[1] second value.
postParameters.add(new BasicNameValuePair("ClientType",
params[1]));
postParameters.add(new BasicNameValuePair("Version",
params[2]));
String response = null;
try {
response =
executeHttpPost(server,
postParameters);
res = response.toString();
resp = res.replaceAll("\\s+", "");
System.out.println(res);
//resultt =res;
return res;
} catch (Exception e) {
e.printStackTrace();
errorMsg = e.getMessage();
}
return res;
} // end of doInBackground
protected void onPostExecute(String result) {
super.onPostExecute(result);
// After completing http call
// will close this activity and lauch main activity
Intent i = new Intent(SplashScreen.this, LoginLayout.class);
startActivity(i);
// close this activity
finish();
}
}
}

inside onCreate() of SplashScreenActivity
I've replaced finish() with onDestroy() after startActivity(intent)
public class SplashScreenActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash_screen);
new Handler(Looper.getMainLooper()).postDelayed(new Runnable(){
#Override
public void run() {
Intent intent;
intent = new Intent(SplashScreenActivity.this,MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
//here we call the onDestory instead of finish()
onDestroy();
}
}, 1000);
}
}
worked for me

Android - How to get specific data from URL/JSON?

So I have this code, which is a page with a ListView search field and a button to confirm the search, when the button is pressed the ListView is filled with movie names from the Rotten Tomatoes API, The problem is that someone helped me with this code, and I would love some help breaking it down and understanding it sentence after sentence, My main goal is to get is to get the "title", "synopsis" and "url image" of a movie that was clicked in the list, and pass it with an intent to my other activity but the whole JSON and get specific data stuff, got me very confused.
Link to Rotten Tomatoes API documentation, this is my code:
public class MovieAddFromWeb extends Activity implements View.OnClickListener,
OnItemClickListener {
private TextView searchBox;
private Button bGo, bCancelAddFromWeb;
private ListView moviesList;
public List<String> movieTitles;
static final int ACTIVITY_WEB_ADD = 3;
// the Rotten Tomatoes API key
private static final String API_KEY = "8q6wh77s65aw435cab9rbzsq";
// the number of movies to show in the list
private static final int MOVIE_PAGE_LIMIT = 8;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.movie_add_from_web);
InitializeVariables();
}
/*
* Initializing the variables and creating the bridge between the views from
* the xml file and this class
*/
private void InitializeVariables() {
searchBox = (EditText) findViewById(R.id.etSearchBox);
bGo = (Button) findViewById(R.id.bGo);
bCancelAddFromWeb = (Button) findViewById(R.id.bCancelAddFromWeb);
moviesList = (ListView) findViewById(R.id.list_movies);
bGo.setOnClickListener(this);
bCancelAddFromWeb.setOnClickListener(this);
moviesList.setOnItemClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.bGo:
new RequestTask()
.execute("http://api.rottentomatoes.com/api/public/v1.0/movies.json?apikey="
+ API_KEY
+ "&q="
+ searchBox.getText()
+ "&page_limit=" + MOVIE_PAGE_LIMIT);
break;
case R.id.bCancelAddFromWeb:
finish();
break;
}
}
private void refreshMoviesList(List<String> movieTitles) {
moviesList.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, movieTitles
.toArray(new String[movieTitles.size()])));
}
private class RequestTask extends AsyncTask<String, String, String> {
// make a request to the specified url
#Override
protected String doInBackground(String... uri) {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response;
String responseString = null;
try {
// make a HTTP request
response = httpclient.execute(new HttpGet(uri[0]));
StatusLine statusLine = response.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
responseString = out.toString();
} else {
// close connection
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
} catch (Exception e) {
Log.d("Test", "Couldn't make a successful request!");
}
return responseString;
}
#Override
protected void onPostExecute(String response) {
super.onPostExecute(response);
try {
// convert the String response to a JSON object
JSONObject jsonResponse = new JSONObject(response);
// fetch the array of movies in the response
JSONArray jArray = jsonResponse.getJSONArray("movies");
// add each movie's title to a list
movieTitles = new ArrayList<String>();
for (int i = 0; i < jArray.length(); i++) {
JSONObject movie = jArray.getJSONObject(i);
movieTitles.add(movie.getString("title"));
}
// refresh the ListView
refreshMoviesList(movieTitles);
} catch (JSONException e) {
Log.d("Test", "Couldn't successfully parse the JSON response!");
}
}
}
#Override
public void onItemClick(AdapterView<?> av, View view, int position, long id) {
Intent openMovieEditor = new Intent(this, MovieEditor.class);
openMovieEditor.putExtra("movieTitle", movieTitles.get(position));
openMovieEditor.putExtra("callingActivity", ACTIVITY_WEB_ADD);
startActivityForResult(openMovieEditor, ACTIVITY_WEB_ADD);
}
}

see the modified code below..
public class MovieAddFromWeb extends Activity implements View.OnClickListener, OnItemClickListener {
private TextView searchBox;
private Button bGo, bCancelAddFromWeb;
private ListView moviesList;
public List<String> movieTitles;
//added new variables
public List<String> movieSynopsis;
public List<String> movieImgUrl;
static final int ACTIVITY_WEB_ADD = 3;
// the Rotten Tomatoes API key
private static final String API_KEY = "8q6wh77s65aw435cab9rbzsq";
// the number of movies to show in the list
private static final int MOVIE_PAGE_LIMIT = 8;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.movie_add_from_web);
InitializeVariables();
}
/*
* Initializing the variables and creating the bridge between the views from
* the xml file and this class
*/
private void InitializeVariables() {
searchBox = (EditText) findViewById(R.id.etSearchBox);
bGo = (Button) findViewById(R.id.bGo);
bCancelAddFromWeb = (Button) findViewById(R.id.bCancelAddFromWeb);
moviesList = (ListView) findViewById(R.id.list_movies);
bGo.setOnClickListener(this);
bCancelAddFromWeb.setOnClickListener(this);
moviesList.setOnItemClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.bGo:
new RequestTask()
.execute("http://api.rottentomatoes.com/api/public/v1.0/movies.json?apikey="
+ API_KEY
+ "&q="
+ searchBox.getText()
+ "&page_limit=" + MOVIE_PAGE_LIMIT);
break;
case R.id.bCancelAddFromWeb:
finish();
break;
}
}
private void refreshMoviesList(List<String> movieTitles) {
moviesList.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, movieTitles
.toArray(new String[movieTitles.size()])));
}
private class RequestTask extends AsyncTask<String, String, String> {
// make a request to the specified url
#Override
protected String doInBackground(String... uri) {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response;
String responseString = null;
try {
// make a HTTP request
response = httpclient.execute(new HttpGet(uri[0]));
StatusLine statusLine = response.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
responseString = out.toString();
} else {
// close connection
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
} catch (Exception e) {
Log.d("Test", "Couldn't make a successful request!");
}
return responseString;
}
#Override
protected void onPostExecute(String response) {
super.onPostExecute(response);
try {
// convert the String response to a JSON object
JSONObject jsonResponse = new JSONObject(response);
// fetch the array of movies in the response
JSONArray jArray = jsonResponse.getJSONArray("movies");
// add each movie's title to a list
movieTitles = new ArrayList<String>();
//newly added
movieSynopsis = new ArrayList<String>();
movieImgUrl= new ArrayList<String>();
for (int i = 0; i < jArray.length(); i++) {
JSONObject movie = jArray.getJSONObject(i);
movieTitles.add(movie.getString("title"));
movieSynopsis.add(movie.getString(#add the synopsis var name returned by the JSON));
movieImgUrl.add(movie.getString(#add the urlvar name returned by the JSON));
}
// refresh the ListView
refreshMoviesList(movieTitles);
} catch (JSONException e) {
Log.d("Test", "Couldn't successfully parse the JSON response!");
}
}
}
#Override
public void onItemClick(AdapterView<?> av, View view, int position, long id) {
Intent openMovieEditor = new Intent(this, MovieEditor.class);
openMovieEditor.putExtra("movieTitle", movieTitles.get(position));
//newly added
openMovieEditor.putExtra("movieSynopsis", movieSynopsis.get(position));
openMovieEditor.putExtra("movieImgUrl", movieImgUrl.get(position));
openMovieEditor.putExtra("callingActivity", ACTIVITY_WEB_ADD);
startActivityForResult(openMovieEditor, ACTIVITY_WEB_ADD);
}

Parsing Xml with Sax on Android

I'm trying to parse an XML from a url page. To do so I have used the SAX implementation explained in this IBM example with the Adapter and other changes I got from this article. I've also tried to implement an AsyncTask to do the parsing and show a ProgressDialog but I think this is where my application starts to break down.
I don't really know exactly how to implement the AsyncTask into my code, and I believe my poor implementation is causing my app to force close.
MainActivity:
public class MainActivity extends Activity {
/** Called when the activity is first created. */
ListView lv1;
ProgressDialog ShowProgress;
public static ArrayList<MangaItem> MangaItemList = new ArrayList<MangaItem>();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv1 = (ListView) findViewById(R.id.listView1);
ShowProgress = ProgressDialog.show(MainActivity.this, "",
"Loading. Please wait...", true);
//new loadingTask().execute("http://www.mangapanda.com/alphabetical");
new loadFeedTask().execute();
lv1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent(Intent.ACTION_VIEW).setData(Uri
.parse(MangaItemList.get(position).getMangaLink()));
startActivity(intent);
}
});
}
class loadFeedTask extends AsyncTask<String, Void, ArrayList<MangaItem>> {
private String feedUrl;
protected void onPostExecute(String s) {
lv1.setAdapter(new EfficientAdapter(MainActivity.this, MangaItemList));
//new MangaParserTask().execute();
ShowProgress.dismiss();
}
protected ArrayList<MangaItem> doInBackground(String... params) {
ArrayList<MangaItem> ParsedMangaItemList = new ArrayList<MangaItem>();
feedUrl = "http://www.mangapanda.com/alphabetical";
FeedParser parser = new SaxFeedParser(feedUrl);
ParsedMangaItemList = parser.parse();
for (MangaItem mitem : ParsedMangaItemList) {
MangaItemList.add(mitem);
}
return MangaItemList;
}
}
}
How can I properly use AsyncTask so that my parser will return an ArrayList that I can then put into an ArrayAdapter

Improper use of type parameters in subclass (AsyncTask<Params, Progress, Result>). Re-write the AsyncTask sub-class.
class loadFeedTask extends AsyncTask<String, Void, ArrayList<MangaItem>> {
protected void onPostExecute(ArrayList<MangaItem> list) {
lv1.setAdapter(new EfficientAdapter(MainActivity.this, list));
ShowProgress.dismiss();
}
protected ArrayList<MangaItem> doInBackground(String... params) {
ArrayList<MangaItem> list=null;
String feedUrl = "http://www.mangapanda.com/alphabetical";
FeedParser parser = new SaxFeedParser(feedUrl);
list = parser.parse();
MangaItemList=list;
return list;
}
}

use this code
try {
items = new ArrayList<String>();
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
XmlPullParser xpp = factory.newPullParser();
xpp.setInput(new InputStreamReader(
getUrlData(" url")));
while (xpp.getEventType() != XmlPullParser.END_DOCUMENT) {
Log.i(TAG, "doc started");
if (xpp.getEventType() == XmlPullParser.START_TAG) {
if (xpp.getName().equals("entry")) {
items.add(xpp.getAttributeValue(0));
}
}
xpp.next();
}
} catch (Throwable t) {
Toast.makeText(this, "Request failed: " + t.toString(),
Toast.LENGTH_LONG).show();
}
get url data method
public InputStream getUrlData(String url) throws URISyntaxException,
ClientProtocolException, IOException {
DefaultHttpClient client = new DefaultHttpClient();
HttpGet method = new HttpGet(new URI(url));
HttpResponse res = client.execute(method);
return res.getEntity().getContent();
}