Hi, i don't undestand why this doesn't work, i am trying to retrieve whatever comes after "offer" in the specified url and then display it but when i click on the Offer button on android screen nothing happens. Please help if you could. I have the internet permission in manifest.
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import org.json.JSONArray; import org.json.JSONObject; import android.app.Activity; import android.app.AlertDialog; import android.app.ProgressDialog; import android.os.AsyncTask; import android.os.Bundle; import android.view.View; import android.widget.ListView;
public class LoggedIn extends Activity {
AlertDialog alertDialogStores;
ObjectItem[] ObjectItemData = new ObjectItem[5];
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.logged_in);
// a button to show the pop up with a list view
View.OnClickListener handler = new View.OnClickListener(){
public void onClick(View v) {
switch (v.getId()) {
case R.id.buttonShowPopUp:
LoaderTask task = new LoaderTask();
task.execute();
break;
}
}
};
findViewById(R.id.buttonShowPopUp).setOnClickListener(handler);
}
class LoaderTask extends AsyncTask<Void , Void ,String>{
ProgressDialog progressDialog ;
public LoaderTask(){
progressDialog = new ProgressDialog(SplashActivity.this);
progressDialog.setIndeterminate(false);
progressDialog.setCancelable(false);
progressDialog.setMessage("Loading app data...");
}
@Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog.show();
}
@Override
protected String doInBackground(Void... params) {
return connect("http://ec2-54-175-18-179.compute-1.amazonaws.com/customers/37.json");
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
progressDialog.dismiss();
showPopUp(result);
}
}
private String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
public String connect(String url)
{
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(url);
HttpResponse response;
try {
response = httpclient.execute(httpget);
//Log.i(TAG,response.getStatusLine().toString());
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
String result= convertStreamToString(instream);
instream.close();
return result;
}
} catch (ClientProtocolException e) {
} catch (IOException e) {
}
return null;
}
public void showPopUp(String result){
try{
JSONArray jsonArray = new JSONArray(result);
for(int i = 0 ; i <= 5 ; i++){
JSONObject o = jsonArray.getJSONObject(i);
String http_response = o.getString("offer");
System.out.println("test "+http_response);
//ObjectItemData[i] = new ObjectItem(o);
ObjectItemData[0] = new ObjectItem(http_response);
ObjectItemData[1] = new ObjectItem(http_response);
ObjectItemData[2] = new ObjectItem(http_response);
ObjectItemData[3] = new ObjectItem(http_response);
ObjectItemData[4] = new ObjectItem(http_response);
// adapter instance
ArrayAdapterItem adapter = new ArrayAdapterItem(this, R.layout.list_view_row_item, ObjectItemData);
// create a new ListView, set the adapter and item click listener
ListView listViewItems = new ListView(this);
listViewItems.setAdapter(adapter);
listViewItems.setOnItemClickListener(new OnItemClickListenerListViewItem());
// put the ListView in the pop up
alertDialogStores = new AlertDialog.Builder(LoggedIn.this)
.setView(listViewItems)
.setTitle("Offers")
.show();
}
} catch(Exception e){e.printStackTrace();}
finally{System.out.println("Success");
}
}
}
class LoaderTask extends AsyncTask<Void , Void ,String>{
ProgressDialog progressDialog ;
public LoaderTask(){
progressDialog = new ProgressDialog(SplashActivity.this);
progressDialog.setIndeterminate(false);
progressDialog.setCancelable(false);
progressDialog.setMessage("Loading app data...");
}
@Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog.show();
}
@Override
protected String doInBackground(Void... params) {
return connect("http://ec2-54-175-18-179.compute-1.amazonaws.com/customers/37.json");
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
progressDialog.dismiss();
showPopUp(result);
}
}
private String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
public String connect(String url)
{
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(url);
HttpResponse response;
try {
response = httpclient.execute(httpget);
//Log.i(TAG,response.getStatusLine().toString());
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
String result= convertStreamToString(instream);
instream.close();
return result;
}
} catch (ClientProtocolException e) {
} catch (IOException e) {
}
return null;
}
public void showPopUp(String result){
try{
JSONArray jsonArray = new JSONArray(result);
for(int i = 0 ; i < jsonArray.length() ; i++){
JSONObject o = jsonArray.getJSONObject(i);
String http_response = o.getString("offer");
System.out.println("test "+http_response);
ObjectItemData[i] = new ObjectItem(http_response);
}
//and populate your listview here
} catch(Exception e){e.printStackTrace();}
finally{System.out.println("Success");
}
}
and call this to do task new LoaderTask().execute();
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.