I have two AppCompatActivitys, both should have an onItemClickListener, but one of them doesn't do anything on click. I've just added a Toast for test reason, later on it should call a function to delete an item from list (with an ajax request)
What am I doing wrong?
I have made custom list and custom adapter for this - I know, I am new to Android Studio, but the other Activity works fine, and I cant find any differences.
public class ActivityListofProducts extends AppCompatActivity {
ProgressDialog pd;
SharedPreferences preferences;
String userid;
String session;
String list_id = "-1"; // or other values
String appVersion = "";
private ArrayList<listProductItem> myProducts = new ArrayList<listProductItem>();
private ArrayList<listProductItem> groceryFilterProducts = new ArrayList<listProductItem>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
handleIntent(getIntent());
setContentView(R.layout.activity_list_of_products);
this.setTitle(getString(R.string.grocery_list));
Bundle b = getIntent().getExtras();
SwipeRefreshLayout swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.refreshLayout);
if (b != null)
list_id = b.getString("list_id");
Toast.makeText(this, "List to open " + " " + list_id, Toast.LENGTH_SHORT).show();
preferences =
getSharedPreferences(this.getPackageName(), this.MODE_PRIVATE);
userid = preferences.getString("userid", "");
session = preferences.getString("session", "");
appVersion = preferences.getString("appVersion", "");
getData();
swipeRefreshLayout.setOnRefreshListener(
new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
getData();
swipeRefreshLayout.setRefreshing(false);
}
}
);
}
public void getData() {
AsyncTask<String, String, String> Task_GetListofProducts = new Task_GetListofProducts();
Task_GetListofProducts.execute("https://get-some-json.com");
}
public void initListofProducts(String jsonString) {
Log.i("jsonString",jsonString);
try {
JSONObject jsonResponse = new JSONObject(jsonString);
JSONObject jsonListMode = jsonResponse.getJSONObject("list");
String ListName = jsonListMode.optString("name");
this.setTitle(ListName);
JSONArray jsonMainNode = jsonResponse.optJSONArray("data");
for (int i = 0; i < jsonMainNode.length(); i++) {
JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
int item_amount = jsonChildNode.optInt("item_amount");
int id = jsonChildNode.optInt("id");
String item_name = jsonChildNode.optString("item_name",">Name<");
int done = jsonChildNode.optInt("done", 0);
String timestamp = jsonChildNode.optString("timestamp", "");
String item_scale = jsonChildNode.optString("item_scale", "x");
String img = jsonChildNode.optString("img", "x");
double bestprice = jsonChildNode.optDouble("bestprice");
//int oitems = jsonChildNode.optInt("oitems", 0);
//int shared = jsonChildNode.optInt("shared", 0);
String outPut = "item_amount:"+ item_amount +" id:"+ id +" item_name:"+ item_name +" done:"+ done +" timestamp:"+ timestamp +" item_scale:"+ item_scale +" img:"+ img;
Log.i("outPut",outPut);
myProducts.add(new listProductItem(id, item_name, item_amount, item_scale, img, done, timestamp, bestprice));
}
final ListView lv = findViewById(R.id.grocery_list_of_products);
lv.setAdapter(new listofProductsAdapter(this, myProducts));
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
/*
!! HERE is my problem. This Code seems not to be executed !!
*/
Toast.makeText(ActivityListofProducts.this, "Should handle click now.", Toast.LENGTH_SHORT).show();
}
});
} catch (JSONException e) {
Toast.makeText(getApplicationContext(), "Error" + e.toString(), Toast.LENGTH_SHORT).show();
}
}
public void setProductDone(int pid, int done) {
String url = "put-some-json.com";
new ActivityListofProducts.Task_SetProductDone().execute(url);
}
private class Task_SetProductDone extends AsyncTask<String, String, String> {
protected void onPreExecute() {
super.onPreExecute();
pd = new ProgressDialog(ActivityListofProducts.this);
pd.setMessage("Please wait");
pd.setCancelable(false);
pd.show();
}
protected String doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
Log.i("doInBackground",params.toString());
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 you will get whole response...... :-)
}
return buffer.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (UnknownHostException e) {
Toast.makeText(ActivityListofProducts.this, "No Internet?", Toast.LENGTH_SHORT).show();
} 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();
}
Log.i("onPostExecute", result);
}
}
private class Task_GetListofProducts extends AsyncTask<String, String, String> {
protected void onPreExecute() {
super.onPreExecute();
pd = new ProgressDialog(ActivityListofProducts.this);
pd.setMessage("Please wait");
pd.setCancelable(false);
pd.show();
myProducts = new ArrayList<listProductItem>(); //empty list
}
protected String doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
Log.i("doInBackground",params.toString());
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 you will 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();
}
initListofProducts(result);
}
}
private class Task_FindProducts extends AsyncTask<String, String, String> {
protected void onPreExecute() {
super.onPreExecute();
pd = new ProgressDialog(ActivityListofProducts.this);
pd.setMessage("Please wait");
pd.setCancelable(false);
pd.show();
myProducts = new ArrayList<listProductItem>(); //empty list
}
protected String doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
Log.i("doInBackground",params.toString());
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 you will 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();
}
setFilterProducts(result);
}
}
}
Related
I have a problem with parsing a tag inside a Json object.
My json code is structured like that:
{"giocatori":[{"nome":"Giovanni","cognome":"Muchacha","numero":"1","ruolo":"F-G"},
{"nome":"Giorgio","cognome":"Rossi","numero":"2","ruolo":"AG"},
{"nome":"Andrea","cognome":"Suagoloso","numero":"3","ruolo":"P"},
{"nome":"Salvatore","cognome":"Aranzulla","numero":"4","ruolo":"G"},
{"nome":"Giulio","cognome":"Muchacha","numero":"5","ruolo":"F"}]}
I got the code that let me get the Json file from here: Get JSON Data from URL Using Android? and I'm trying to parse a tag (for example the "nome" tag) into a Json object.
This is the code I got:
public class MainActivity extends AppCompatActivity {
Button btnHit;
TextView txtJson;
ProgressDialog pd;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnHit = (Button) findViewById(R.id.btnHit);
txtJson = (TextView) findViewById(R.id.tvJsonItem);
btnHit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
new JsonTask().execute("https://api.myjson.com/bins/177dpo");
}
});
}
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);
}
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();
}
txtJson.setText(result);
}
}
}
I've never worked with this type of file so I'll really appreciate your help!
You can use something like this:
try {
String servResponse = response.toString();
JSONObject parentObj = new JSONObject(servResponse);
JSONArray parentArray = parentObj.getJSONArray("giocatori");
if (parentArray.length() == 0) {
//if it's empty, do something (or not)
} else {
//Here, finalObj will have your jsonObject
JSONObject finalObj = parentArray.getJSONObject(0);
//if you decide to store some value of the object, you can do like this (i've created a nomeGiocatori for example)
nomeGiocatori = finalObj.getString("nome");
}
} catch (Exception e) {
Log.d("Exception: ", "UnknownException");
}
I use this kind of code all the time, works like a charm.
I would like to retrieve the contents of my variable "$content" in my activity.
But I don't know how to use the return value of my doinbackground.
Can you help me ?
thank you in advance
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String restURL = "https://proxyepn-test.epnbn.net/wsapi/epn";
RestOperation test = new RestOperation();
test.execute(restURL);
}
private class RestOperation extends AsyncTask<String, Void, String> {
//final HttpClient httpClient = new DefaultHttpClient();
String content;
String error;
ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);
String data = "";
TextView serverDataReceived = (TextView)findViewById(R.id.serverDataReceived);
TextView showParsedJSON = (TextView) findViewById(R.id.showParsedJSON);
// EditText userinput = (EditText) findViewById(R.id.userinput);
#Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog.setTitle("Please wait ...");
progressDialog.show();
}
#Override
protected String doInBackground(String... params) {
BufferedReader br = null;
URL url;
try {
url = new URL(params[0]);
URLConnection connection = url.openConnection();
connection.setDoOutput(true);
OutputStreamWriter outputStreamWr = new OutputStreamWriter(connection.getOutputStream());
outputStreamWr.write(data);
outputStreamWr.flush();
br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
StringBuilder sb = new StringBuilder();
String line = null;
while((line = br.readLine())!=null) {
sb.append(line);
sb.append(System.getProperty("line.separator"));
}
content = sb.toString();
} catch (MalformedURLException e) {
error = e.getMessage();
e.printStackTrace();
} catch (IOException e) {
error = e.getMessage();
e.printStackTrace();
} finally {
try {
br.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return content;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
progressDialog.dismiss();
if(error!=null) {
serverDataReceived.setText("Error " + error);
} else {
serverDataReceived.setText(content);
String output = "";
JSONObject jsonResponse;
try {
jsonResponse = new JSONObject(content);
JSONArray jsonArray = jsonResponse.names();
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject child = jsonArray.getJSONObject(i);
String name = child.getString("name");
String number = child.getString("number");
String time = child.getString("date_added");
output = "Name = " + name + System.getProperty("line.separator") + number + System.getProperty("line.separator") + time;
output += System.getProperty("line.separator");
Log.i("content",content);
}
showParsedJSON.setVisibility(View.INVISIBLE);
showParsedJSON.setText(output);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
You can directly call to the method which exist in activity, from onPostExecute method of asynctask by passing "content" value.
#Override
protected void onPostExecute(String content) {
Activity.yourMethod(content);
}
If you want to return the value from asynctask you can use
content = test.execute(url).get();
but it is not a good practice of asynctask, because it is working as serial execution. So it is not fulfill the use of asynctask for palatalization.Because get() will block the UI thread.
I have an project and I'm trying to convey to data from JSON Array to normal array. But I could not this. Can you help me if you know which and where code I add to in my project. My Main Activity file is here
public class MainActivity extends AppCompatActivity {
private TextView tvData;
private String[] stringArray;
protected ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private NavigationView mNavigationView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvData = (TextView)findViewById(R.id.bilgi);
setupToolbar();
initNavigationDrawer();
new JSONTask().execute("http://192.168.1.36:8080/urunler/kategori_goster.php");
}
public class JSONTask extends AsyncTask<String,String,String>
{
#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);
}
String finalJson = buffer.toString();
JSONObject parentObject = new JSONObject(finalJson);
JSONArray parrentArray = parentObject.getJSONArray("uyelerimiz");
StringBuffer finalBufferedData = new StringBuffer();
for(int i=0;i<parrentArray.length(); i++)
{
JSONObject finalObject = parrentArray.getJSONObject(i);
String year = finalObject.getString("kategori_adi");
finalBufferedData.append(year + " \n");
}
return finalBufferedData.toString();
} 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(String result) {
super.onPostExecute(result);
tvData.setText(result);
}
}
JSON is working whitout any problem. I want to add my JSON data to my " private String[] stringArray;"
Here is how the JSON is formatted:
{
"uyelerimiz":[
{
"kategori_adi":"Bilgisayar"
},
{
"kategori_adi" :"Cep Telefonu"
},
{
"kategori_adi":"Saglik"
},
{
"kategori_adi":"Kirtasiye"
}
]
}
private String[] parseJson(String response){
try {
JSONObject lJsonObject = new JSONObject(response);
JSONArray lJsonArray = lJsonObject.getJSONArray("uyelerimiz");
String[] lResult = new String[lJsonArray.length()];
for (int index = 0;index<lJsonArray.length();index++){
lResult[index] = lJsonArray.getJSONObject(index).getString("kategori_adi");
}
return lResult;
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
public class GetPlaceSearchTask extends AsyncTask<String , Void ,String>
{
private Context context;
private ProgressDialog dialog;
public static final String SEND_RESULT_SEARCH_BROADCAST_FROM_TASK = "send_result_search";
private String API_LOCATION = "https://maps.googleapis.com/maps/api/place/nearbysearch/" +
"json?location=-33.8670522,151.1957362&radius=500&type=restaurant&name=cruise&key=";
public GetPlaceSearchTask(Context context) {
this.context = context;
}
protected void onPreExecute() {
if (context != null) {
dialog = new ProgressDialog(context);
dialog.setTitle("Downloading");
dialog.show();
}
}
#Override
protected String doInBackground(String... params) {
HttpsURLConnection connection = null;
BufferedReader reader = null;
StringBuilder builder = new StringBuilder();
try {
URL url = new URL(String.format(API_LOCATION, params[0], params[1]));
connection = (HttpsURLConnection) url.openConnection();
if (connection.getResponseCode() != HttpsURLConnection.HTTP_OK) {
return null;
}
reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while ((line = reader.readLine()) != null) {
builder.append(line);
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if (connection != null) {
connection.disconnect();
}
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return builder.toString();
}
#Override
protected void onPostExecute(String result) {
if (dialog != null) {
dialog.dismiss();
}
Intent intent = new Intent(SEND_RESULT_SEARCH_BROADCAST_FROM_TASK);
intent.putExtra("result_search", result);
LocalBroadcastManager.getInstance(context).sendBroadcast(intent);
}
public static class GetPlaceSearchTextTask extends AsyncTask<String , Void , String>{
private String API_TEXT = "https://maps.googleapis.com/maps/api/place/textsearch/" +
"json?query=%1$s&location=[%2$s,%3$s]&radius=5000&key=";
public static final String SEND_BROADCAST_RESULT_TEXT_FROM_TASK = "sand_text_result";
private Context context;
private ProgressDialog dialog ;
public GetPlaceSearchTextTask(Context context){
this.context = context;
}
#Override
protected void onPreExecute() {
if (context != null) {
dialog = new ProgressDialog(context);
dialog.setTitle("Downloading");
dialog.show();
}
}
#Override
protected String doInBackground(String... params) {
HttpsURLConnection connection = null;
BufferedReader reader = null;
StringBuilder builder = new StringBuilder() ;
try {
URL url = new URL(API_TEXT + params[0] + params[1] + params[2]) ;
connection = (HttpsURLConnection) url.openConnection();
if (connection.getResponseCode() != HttpsURLConnection.HTTP_OK){
return null;
}
reader = new BufferedReader(new InputStreamReader(connection.getInputStream())) ;
String line;
while ((line=reader.readLine())!= null){
builder.append(line);
}`enter code here`
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if (connection!=null)
connection.disconnect();
if (reader!=null)
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
return builder.toString();
}
#Override
protected void onPostExecute(String result_text) {
if (dialog!=null){
dialog.dismiss();
}`enter code here`
Intent intent = new Intent(SEND_BROADCAST_RESULT_TEXT_FROM_TASK);
intent.putExtra("text" , result_text);
LocalBroadcastManager.getInstance(context).sendBroadcast(intent);
}
}
}
I am using Thread for Webservice but i cant get the data from Thread because i cant return data from Thread.
This is my WebService.java :
public class Webservice {
static String result;
public static String readUrl(final String url) {
Thread thread = new Thread(new Runnable() {
#Override
public void run() {
try {
HttpClient client = new DefaultHttpClient();
HttpPost method = new HttpPost(url);
HttpResponse response = client.execute(method);
InputStream stream = response.getEntity().getContent();
result = ConvertInputStreamToString(stream);
Log.i("xxx","OK" + result);
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
thread.start();
return result;
}
private static String ConvertInputStreamToString(InputStream inputstteam) {
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
inputstteam));
StringBuilder builder = new StringBuilder();
String line = "";
while ((line = reader.readLine()) != null) {
builder.append(line);
}
return builder.toString();
}
catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
This is NotesActivity.java :
public class NotesActivity extends Activity {
private ArrayList<StructTask> nettasks = new ArrayList<StructTask>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Thread thread = new Thread(new Runnable() {
#Override
public void run() {
String result = Webservice.readUrl("http://192.168.200.101:8081/note-server/");
if (result != null) {
try {
JSONArray tasks = new JSONArray(result);
for (int i = 0; i < tasks.length(); i++) {
JSONObject object = tasks.getJSONObject(i);
//Log.i("LOG", "Task: " + object.getString("task_title"));
StructTask task = new StructTask();
task.id = object.getLong("task_id");
task.title = object.getString("task_title");
task.desc = object.getString("task_desc");
task.done = object.getBoolean("task_done");
nettasks.add(task);
for (StructTask taskes : nettasks) {
Log.i("LOG", "Taskes: " + taskes.id + "|" + taskes.title + "|" + taskes.desc + "|" + taskes.done);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
else
{
Log.i("OK", "TaskesOK: " + result);
Log.i("LOG", "Task: " + "NULL");
}
}
});
thread.start();
}
}
This is my StructTask.java :
public class StructTask {
public long id;
public String title;
public String desc;
public boolean done;
}
This code return for me NULL .
Just try this way
1) Webservice.java
public class Webservice {
public interface WebCallListener{
void onCallComplete(String result);
}
public static void readUrl(final String url,final WebCallListener callListener) {
Thread thread = new Thread(new Runnable() {
#Override
public void run() {
try {
HttpClient client = new DefaultHttpClient();
HttpPost method = new HttpPost(url);
HttpResponse response = client.execute(method);
InputStream stream = response.getEntity().getContent();
callListener.onCallComplete(ConvertInputStreamToString(stream));
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
thread.start();
}
private static String ConvertInputStreamToString(InputStream inputstteam) {
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
inputstteam));
StringBuilder builder = new StringBuilder();
String line = "";
while ((line = reader.readLine()) != null) {
builder.append(line);
}
return builder.toString();
}
catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
2) NotesActivity.java
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Webservice.readUrl("http://192.168.200.101:8081/note-server/",new WebCallListener() {
#Override
public void onCallComplete(String result) {
if (result != null) {
try {
JSONArray tasks = new JSONArray(result);
for (int i = 0; i < tasks.length(); i++) {
JSONObject object = tasks.getJSONObject(i);
//Log.i("LOG", "Task: " + object.getString("task_title"));
StructTask task = new StructTask();
task.id = object.getLong("task_id");
task.title = object.getString("task_title");
task.desc = object.getString("task_desc");
task.done = object.getBoolean("task_done");
nettasks.add(task);
}
for (StructTask taskes : nettasks) {
Log.i("LOG", "Taskes: " + taskes.id + "|" + taskes.title + "|" + taskes.desc + "|" + taskes.done);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
else
{
Log.i("OK", "TaskesOK: " + result);
Log.i("LOG", "Task: " + "NULL");
}
}
});
}
You may use your code some thing like this:
private class ImageDownloader extends AsyncTask {
#Override
protected Bitmap doInBackground(String... param) {
// TODO Auto-generated method stub
return myBackgroundImageDownloadFun(param[0]);
}
#Override
protected void onPreExecute() {
Log.i("Async-Example", "onPreExecute Called");
simpleWaitDialog = ProgressDialog.show(ImageDownladerActivity.this,
"Wait", "Downloading Image");
}
#Override
protected void onPostExecute(Bitmap result) {
Log.i("Async-Example", "onPostExecute Called");
MyImageView.setImageBitmap(result);
simpleWaitDialog.dismiss();
}
For this you can use AsyncTask i.e,
private class Webservice extends AsyncTask<Void, Void, ArrayList<StructTask>> {
private ArrayList<StructTask> nettasks = new ArrayList<StructTask>();
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected ArrayList<StructTask> doInBackground(Void... params) {
try {
String result = readUrl("http://192.168.200.101:8081/note-server/");
JSONArray tasks = new JSONArray(result);
for (int i = 0; i < tasks.length(); i++) {
JSONObject object = tasks.getJSONObject(i);
//Log.i("LOG", "Task: " + object.getString("task_title"));
StructTask task = new StructTask();
task.id = object.getLong("task_id");
task.title = object.getString("task_title");
task.desc = object.getString("task_desc");
task.done = object.getBoolean("task_done");
nettasks.add(task);
}
for (StructTask taskes : nettasks) {
Log.i("LOG", "Taskes: " + taskes.id + "|" + taskes.title + "|" + taskes.desc + "|" + taskes.done);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return nettasks;
}
/* after parsing response this method will be called*/
#Override
protected void onPostExecute(ArrayList<StructTask> result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
}
private String readUrl(String url) throws Exception{
HttpClient client = new DefaultHttpClient();
HttpPost method = new HttpPost(url);
HttpResponse response = client.execute(method);
InputStream stream = response.getEntity().getContent();
String result = ConvertInputStreamToString(stream);
Log.i("xxx", "OK" + result);
return result;
}
private String ConvertInputStreamToString(InputStream inputstteam) {
try {
BufferedReader reader = new BufferedReader(
new InputStreamReader(inputstteam));
StringBuilder builder = new StringBuilder();
String line = "";
while ((line = reader.readLine()) != null) {
builder.append(line);
}
return builder.toString();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
In your activity class in onCreate method try to call like this
Webservice service=new Webservice();
service.excute();
so it will starts the excution of the above thread.
i think this will helps you