Hey all..I am struck here, I have to display news in a separate list view from a news link web site, but when I debug the cursor goes null. How do I resolve this? Here is my code
package adn.GoMizzou.NB;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
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.HttpPost;
import org.apache.http.entity.BufferedHttpEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class NB extends ListActivity {
public static final String URL = "http://nbsubscribe.missouri.edu/news-releases/feed/atom/";
private String msg;
private boolean success;
private int scrollIndex;
private int scrollTop;
private HttpClient httpClient;
private NBDBAdapter dbAdapter;
private ProgressDialog pDialog;
private Context ctx = this;
private SharedPreferences prefs;
private SharedPreferences.Editor prefsEditor;
//private Cursor cur;
private Cursor q;
private Handler handler = new Handler() {
#Override
public void handleMessage(Message msg){
pDialog.dismiss();
fillList();
}
};
/* ACTIVITY METHODS */
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.nb);
setTitle("News");
q=null;
scrollIndex = 0;
dbAdapter = new NBDBAdapter(this);
dbAdapter.open();
registerForContextMenu(getListView());
getData();
}
public void getData(){
pDialog = ProgressDialog.show(this, "", "Loading. Please wait...", true);
new Thread(){
public void run(){
dbAdapter.deleteAll();
dbAdapter.close();
doPost(URL, "");
dbAdapter.open();
handler.sendEmptyMessage(0);
}
}.start();
}
public boolean doPost(String url, String postMsg){
HttpResponse response = null;
createHttpClient();
try {
URI uri = new URI(url);
HttpPost httppost = new HttpPost(uri);
StringEntity postEntity = new StringEntity(postMsg);
httppost.setHeader("Content-Type", "application/x-www-form-urlencoded");
postEntity.setContentType("application/x-www-form-urlencoded");
httppost.setEntity(postEntity);
response = httpClient.execute(httppost);
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (URISyntaxException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(response == null){
msg = "No internet connection.";
return false;
}
if(response.getStatusLine().getStatusCode()!= 200){
msg = "Server error.";
return false;
}
return doParse(response);
}
public void createHttpClient(){
if(httpClient == null){
httpClient = new DefaultHttpClient();
}
}
public boolean doParse(HttpResponse response){
try {
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XMLReader xr = sp.getXMLReader();
NBParser respHandler = new NBParser(ctx);
xr.setContentHandler(respHandler);
HttpEntity entity = response.getEntity();
BufferedHttpEntity buffEntity = new BufferedHttpEntity(entity);
xr.parse(new InputSource(buffEntity.getContent()));
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
if(e.getMessage().toString().contains("nothing found")){
msg = e.getMessage().toString();
return false;
}
} catch (IOException e) {
e.printStackTrace();
}
return true;
}
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Cursor c = q;
q.moveToPosition(position);
//Intent i = new Intent(this, NB.class);
//i.putExtra("link", c.getString(c.getColumnIndexOrThrow(NBDBAdapter.NB_LINK)));
String newsLinkString = q.getString(q.getColumnIndexOrThrow(NBDBAdapter.NB_LINK));
TextView linkTV = (TextView) v.findViewById(R.id.rowlink);
newsLinkString = linkTV.getText().toString();
if (newsLinkString.startsWith("http://")){
Uri uri = Uri.parse(newsLinkString);
Intent i = new Intent(this, NB.class);
// Save ListView position
i.putExtra("link", c.getString(c.getColumnIndexOrThrow(NBDBAdapter.NB_LINK)));
startActivity(i);
}
}
//else {
//showLinkError();
//}
// Sends an error message to the user if the news item link is malformed
//public void showLinkError() {
//Toast.makeText(getApplicationContext(), "Error - Link to story unavailable with news source could not load the News Story", Toast.LENGTH_SHORT).show();
//}
private void showLinkError() {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Error - Link to story unavailable with news source could not load the News Story", Toast.LENGTH_SHORT).show();
}
public void fillList(){
if(!success) {
TextView emptyView = (TextView) findViewById(android.R.id.empty);
emptyView.setText(msg);
msg = "";
}
if(!dbAdapter.isOpen()) dbAdapter.open();
Cursor cursor = dbAdapter.fetchAll();
startManagingCursor(cursor);
String [] from = new String[] { dbAdapter.NB_AUTHOR, dbAdapter.NB_TITLE,dbAdapter.NB_LINK };
int[] to = new int[] { R.id.rowAuthor, R.id.rowTitle, R.id.rowlink };
SimpleCursorAdapter list = new SimpleCursorAdapter(this, R.layout.row, cursor, from, to);
setListAdapter(list);
}
}
Which cursor are you talking about?
If it's when you click on an item it's because you assign the cursor q null in onCreate and then call moveToPosition on it in onListItemClick.
Related
The following code when run crashes my app. I am calling it in the MainActivity. When run it tells me:
FATAL EXCEPTION: AsyncTask #1 and directs me toward the ProgressDialog and Http Response Line
import android.app.Fragment;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import com.montel.senarivesselapp.model.ShowDataList;
import com.montel.senarivesselapp.model.Vessel;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpResponseException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
public class ShowallFragment extends Fragment {
//variables for JSON query
private static final String name ="vessel_name";
private static final String etad="eta_date";
private static final String etat="eta_time";
private static final String etbd="etb_date";
private static final String etbt="etb_time";
private static final String shippingName="shipping_agent_name";
private static final String v1 = "vessels";
private static final String v2 = "Vessel";
private ArrayList<Vessel> vList = new ArrayList<>();
private ArrayAdapter arrayAdapter = null;
private ListView listView = null;
private EditText et = null;
private ShowDataList ssadapter = null;
private View rootView;
public ShowallFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_showall, container, false);
setContentView(R.layout.fragment_showall);
setRetainInstance(true);
return rootView;
}
private void setContentView(int fragment_showall) {
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
//For getting the JSON schedule from server
class Schedule extends AsyncTask<String, String, String> {
ProgressDialog loadDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
//Show the loading dialog
loadDialog = new ProgressDialog(ShowallFragment.this);
loadDialog.setMessage("Please wait....");
loadDialog.setCancelable(false);
loadDialog.show();
}
#Override
protected String doInBackground(String... uri) {
BufferedReader input = null;
String data = null;
try {
DefaultHttpClient client = new DefaultHttpClient();
HttpResponse response = client.execute(new HttpGet("http://"));
StatusLine stline = response.getStatusLine();
if (stline.getStatusCode() == HttpStatus.SC_OK) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
data = out.toString();
out.close();
} else {
response.getEntity().getContent().close();
throw new IOException(stline.getReasonPhrase());
}
} catch (HttpResponseException he) {
he.printStackTrace();
} catch (ClientProtocolException cpe) {
cpe.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (input != null) {
try {
input.close();
return data;
} catch (Exception e) {
System.out.println(e);
}
}
}
return data;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
//Fill the vList array
Log.d("POST EXECUTE", result.toString());
loadDialog.dismiss();
if (result != null) {
try {
JSONObject jo = new JSONObject(result);
JSONArray vessels = jo.getJSONArray(v1);
Log.d("VESSEL LOG", vessels.toString());
vList = new ArrayList();
for (int i = 0; i < vessels.length(); i++) {
JSONObject vv = vessels.getJSONObject(i);
Log.d("VESSEL NAME", vv.getJSONObject(v2).getString(name));
vList.add(new Vessel(vv.getJSONObject(v2).getString(name),
vv.getJSONObject(v2).getString(etad),
vv.getJSONObject(v2).getString(etat),
vv.getJSONObject(v2).getString(etbd),
vv.getJSONObject(v2).getString(etbt),
vv.getJSONObject(v2).getString(shippingName)));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
listView = (ListView) rootView.findViewById(R.id.dataShow);
listView.setAdapter(arrayAdapter);
ssadapter = new ShowDataList(ShowallFragment.this , vList);
listView.setAdapter(ssadapter);
}
}
}
SecurityException: Permission denied (missing INTERNET permission
So you should request INTERNET permission in your projects AndroidManifest.xml file. Add on the rigth place:
<uses-permission android:name="android.permission.INTERNET" />
in your onPostExecute() change the position of Log.d("POST EXECUTE", result.toString()); to be inside catch so your code will look like this:
catch (Exception ee) {
ee.printStackTrace();
}
catch (JSONException e) {
Log.d("POST EXECUTE", e.toString());
} // catch (JSONException e)
> This is my MainActivity.java That receives all json data from the php file and converts into string format and print it in listview using string array but i have problem with bitmap image array
I want to add multiple items in listview like textview and image i dont have problem with textview it displays properly but with image it is not done
package com.demo.php.listview;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collection;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
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.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.net.ParseException;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.MediaStore.Images;
import android.util.Base64;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnItemClickListener {
JSONArray jArray;
String result = null;
InputStream is = null;
StringBuilder sb = null;
ArrayList<String> al = new ArrayList<String>();
ArrayList<String> al1 = new ArrayList<String>();
ArrayList<String> al2 = new ArrayList<String>();
ArrayList<String> al3=new ArrayList<String>();
String targetmonth;
String targetyear;
String targetamount;
String Dphoto;
// int responseCode;
//int listItemCount=0;
ListView listview ;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTheme(Color.WHITE);
setTitleColor(Color.rgb(0x74, 0, 0x37));
setTitle("Doctor's List");
requestWindowFeature(Window.FEATURE_RIGHT_ICON);
setContentView(R.layout.main);
listview = (ListView) findViewById(R.id.listView1);
listview.setOnItemClickListener(this);
new LoadData().execute();
}
private class LoadData extends AsyncTask<Void, Void, Void> {
private ProgressDialog progressDialog;
#Override
// can use UI thread here
protected void onPreExecute() {
this.progressDialog = ProgressDialog.show(MainActivity.this, ""," Loading...");
}
#Override
protected void onPostExecute(final Void unused) {
try{
listview.setAdapter(new DataAdapter(MainActivity.this,
al.toArray(new String[al.size()]),
al1.toArray(new String[al1.size()]),
al2.toArray(new String[al2.size()]),
al3.toArray(new Bitmap[al3.size()])));
this.progressDialog.dismiss();
}
catch(Exception e){
Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
}
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
// HTTP post
try {
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
HttpClient httpclient = new DefaultHttpClient();
try{
HttpPost httppost = new HttpPost("http://10.0.2.2/android/test.php");
StringEntity se = new StringEntity("envelope",HTTP.UTF_8);
httppost.setEntity(se);
HttpParams httpParameters = new BasicHttpParams();
// Set the timeout in milliseconds until a connection is established.
int timeoutConnection = 3000;
HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
// Set the default socket timeout (SO_TIMEOUT)
// in milliseconds which is the timeout for waiting for data.
int timeoutSocket = 3000;
HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}
catch(Exception e){
Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
}
//buffered reader
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 80);
sb = new StringBuilder();
sb.append(reader.readLine() + "\n");
String line = "0";
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result = sb.toString();
}
catch(Exception e){
Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
}
try{
jArray = new JSONArray(result);
JSONObject json_data = null;
for (int i = 0; i < jArray.length(); i++) {
json_data = jArray.getJSONObject(i);
targetamount=json_data.getString("DName");
targetmonth=json_data.getString("Dspl");
targetyear = json_data.getString("Dedu");
Dphoto = json_data.getString("Dphoto");
al.add(targetmonth);
al1.add(targetyear);
al2.add(targetamount);
al3.add(Dphoto);
//listItemCount=al2.size();
}
}
catch(JSONException e){
Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
}
} catch (ParseException e) {
// Log.e("log_tag", "Error in http connection" + e.toString());
Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
}
catch (Exception e) {
// Log.e("log_tag", "Error in http connection" + e.toString());
Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
}
return null;
}
}
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
Intent intent = new Intent(this, NextItem.class);
startActivity(intent);
}
}
>This is my DataAdapter
I am not getting the image in Listview I am little bit confuse about the image bitmap array please helps with that bitmap
package com.demo.php.listview;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.provider.MediaStore.Images;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class DataAdapter extends BaseAdapter {
Context mContext;
private LayoutInflater mInflater;
String targetmonth;
String targetyear;
String targetamount;
//Bitmap Dphoto1;
String[] month;
String[] year;
String[] amount;
String[] Dphoto1;
Bitmap[] Dphoto2;
private String src;
public DataAdapter(Context c, String[] month, String[] year, String[] amount,Bitmap[] Dphoto2) {
//this.sta = sta;
Bitmap[] = (Bitmap[]) getBitmapFromURL(Dphoto2);
this.month = month;
this.year = year;
this.amount = amount;
this.Dphoto2=Dphoto2;
mContext = c;
mInflater = LayoutInflater.from(c);
}
public int getCount() {
return month.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.doctor, parent, false);
holder = new ViewHolder();
holder.month = (TextView) convertView
.findViewById(R.id.Dname);
holder.year = (TextView) convertView.findViewById(R.id.Dspl);
holder.amount = (TextView) convertView
.findViewById(R.id.Dedu);
holder.Dphoto2=(ImageView)convertView.findViewById(R.id.Dphoto2);
if (position == 0) {
convertView.setTag(holder);
}
} else {
holder = (ViewHolder) convertView.getTag();
}
try {
holder.month.setText(month[position]);
holder.year.setText(year[position]);
holder.amount.setText(amount[position]);
holder.Dphoto2.setImageBitmap(Dphoto2[position]);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return convertView;
}
private Object getBitmapFromURL(Bitmap[] dphoto2) {
// TODO Auto-generated method stub
try{
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
return myBitmap;
}
catch(Exception e)
{
e.printStackTrace();
return null;
}
}
static class ViewHolder {
public ImageView Dphoto2;
public TextView Dphoto1;
public ImageView Dphoto;
TextView month;
TextView year, amount;
}
public class ImageLoadTask {
public void execute(String dphoto1) {
// TODO Auto-generated method stub
}
}}
The JSON text will deliver a base64 encoded bitmap or jpg.
ArrayList<String> al3=new ArrayList<String>();
change that to:
ArrayList<Bitmap> al3=new ArrayList<Bitmap>();
And in the loop change:
al3.add(Dphoto);
to:
Bitmap bitmap = decodeBitmapFromBase64 (Dphoto);
al3.add(bitmap);
Remove:
Bitmap[] = (Bitmap[]) getBitmapFromURL(Dphoto2); // does not even compile!
You have to implement a function decodeBitmapFromBase64(). You can find code for it on this site.
Remove all Toast()s from doInBackground. They are not allowed there. Put them in onPostExecute instead.
package com.example.selflistview;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
TextView text;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
connect();
}
private void connect() {
String data;
List<String> r = new ArrayList<String>();
ArrayAdapter<String>adapter=new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1,r);
ListView list=(ListView)findViewById(R.id.listView1);
try {
DefaultHttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet("http://localhost/listview.php");
HttpResponse response = client.execute(request);
HttpEntity entity=response.getEntity();
data=EntityUtils.toString(entity);
Log.e("STRING", data);
try {
JSONArray json=new JSONArray(data);
for(int i=0;i<json.length(); i++)
{
JSONObject obj=json.getJSONObject(i);
String name=obj.getString("name");
String year=obj.getString("year");
String age=obj.getString("age");
Log.e("STRING", name);
r.add(name);
//r.add(year);
//r.add(age);
list.setAdapter(adapter);
list.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {
// TODO Auto-generated method stub
//final String item = (String) arg0.getItemAtPosition(arg2);
Toast.makeText(getBaseContext(), "arg2 : "+arg2, Toast.LENGTH_SHORT).show();
Intent view_det = new Intent(getBaseContext(),ViewDetail.class);
view_det.putExtra("position",arg2);
startActivity(view_det);
}
});
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (ClientProtocolException e) {
Log.d("HTTPCLIENT", e.getLocalizedMessage());
} catch (IOException e) {
Log.d("HTTPCLIENT", e.getLocalizedMessage());
}
}
}
I want to send Year, name and age to another activity, i am able to get the positions at intent but not the other values. please help...
I am able to see those values in list., but not able to call at intent section.
Your help will be appreciated..
This might help
Public class MainActivity extends Activity {
TextView text;
List<String> r; //define list here
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
connect();
}
private void connect() {
String data;
r = new ArrayList<String>();
try {
DefaultHttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet("http://localhost/listview.php");
HttpResponse response = client.execute(request);
HttpEntity entity=response.getEntity();
data=EntityUtils.toString(entity);
Log.e("STRING", data);
try {
JSONArray json=new JSONArray(data);
for(int i=0;i<json.length(); i++)
{
JSONObject obj=json.getJSONObject(i);
String name=obj.getString("name");
String year=obj.getString("year");
String age=obj.getString("age");
Log.e("STRING", name);
r.add(name);
//r.add(year);
//r.add(age);
}
ArrayAdapter<String>adapter=new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1,r);
ListView list=(ListView)findViewById(R.id.listView1);
list.setAdapter(adapter);
list.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {
// TODO Auto-generated method stub
//final String item = (String) arg0.getItemAtPosition(arg2);
Toast.makeText(getBaseContext(), "arg2 : "+arg2, Toast.LENGTH_SHORT).show();
Intent view_det = new Intent(getBaseContext(),ViewDetail.class);
view_det.putExtra("position",arg2);
String name = r.get(arg2);//add this line to get name from the arraylist of that position
JSONObject obj=json.getJSONObject(arg2); //you can get other two values from json object
String year=obj.getString("year");
String age=obj.getString("age");
view_det.putExtra("name",name); //add this
view_det.putExtra("year",year); //add this
view_det.putExtra("age",age); //add this
startActivity(view_det);
}
});
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (ClientProtocolException e) {
Log.d("HTTPCLIENT", e.getLocalizedMessage());
} catch (IOException e) {
Log.d("HTTPCLIENT", e.getLocalizedMessage());
}
}
}
I am beginner for Android. I want to send the data to my PHP page. but here i m trying to toast that post values. but there is no response. Plz help me.
My Code is:
public class send_msgActivity extends Activity{
//static final String KEY_NAME = "name";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.send_msg);
Button btn_ok = (Button) findViewById(R.id.btn_ok);
btn_ok.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
EditText editText1 = (EditText)findViewById(R.id.sender);
String S_name = editText1.getText().toString();
EditText editText2 = (EditText)findViewById(R.id.reciever);
String S_email = editText2.getText().toString();
postData(S_name,S_email);
}
});
};
public void postData(String name,String email) {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.URL.com/yourpage.php");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("Fname", name));
nameValuePairs.add(new BasicNameValuePair("Femail", email));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
//HttpResponse response = httpclient.execute(httppost, new BasicResponseHandler());
HttpResponse response = httpclient.execute(httppost);
String reverseString = response.toString();
Toast.makeText(this, "response" + reverseString, Toast.LENGTH_LONG).show();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
}
Use this example how to code HTTPpost method
package com.example.login;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.http.HttpResponse;a
import org.apache.http.NameValuePair;
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.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
public class pdf extends Activity
{
public boolean connect=false,logged=false;
public String db_select;
ListView l1;
String mPwd,UName1="Success",UName,ret;
public Iterator<String> itr;
private String SERVICE_URL = "http://61.12.7.197:8080/Agero/person/pdf";
private String SERVICE_URL1 = "http://61.12.7.197:8080/Agero/person/url";
//private final String SERVICE_URL = "http://10.1.1.138:8080/Agero/person/pdf";
//private final String SERVICE_URL1 = "http://10.1.1.138:8080/Agero/person/url";
private final String TAG = "Course";
ArrayList<String> todoItems;
Boolean isInternetPresent = false;
ConnectionDetector cd;
ArrayAdapter<String> aa;
public List<String> list1=new ArrayList<String>();
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.pdf);
l1 = (ListView)findViewById(R.id.list);
todoItems = new ArrayList<String>();
aa = new ArrayAdapter<String>(this,R.layout.list_row,R.id.title,todoItems);
l1.setAdapter(aa);
todoItems.clear();
cd = new ConnectionDetector(getApplicationContext());
isInternetPresent = cd.isConnectingToInternet();
if(isInternetPresent)
{
try
{
validat_user();
//display("hi");
}
catch(Exception e)
{
display("Network error.\nPlease check with your network settings.");
}
}
else
{
display("No Internet Connection..");
}
l1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
String name=(String)parent.getItemAtPosition(position);
/*Toast.makeText(getBaseContext(), name, Toast.LENGTH_LONG).show();
Intent i = new Intent(getBaseContext(),Webview.class);
i.putExtra("USERNAME", name);
startActivity(i);*/
cd = new ConnectionDetector(getApplicationContext());
isInternetPresent = cd.isConnectingToInternet();
if(isInternetPresent)
{
try
{
validat_user1(name);
}
catch(Exception e)
{
display("Network error.\nPlease check with your network settings.");
}
}
else
{
display("No Internet Connection..");
}
}
});
}
public void display(String msg)
{
Toast.makeText(pdf.this, msg, Toast.LENGTH_LONG).show();
}
private void validat_user()
{
WebServiceTask wst = new WebServiceTask(WebServiceTask.POST_TASK, this, "");
// wst.addNameValuePair("State", stg1);
// wst.addNameValuePair("Emp_PWD", stg2);
// db_select=stg1;
//display("I am");
wst.execute(new String[] { SERVICE_URL });
//display(SERVICE_URL);
}
private void validat_user1(String stg1)
{
db_select=stg1;
WebServiceTask wst = new WebServiceTask(WebServiceTask.POST_TASK, this, "Loading...");
wst.addNameValuePair1("PDF_NAME", stg1);
wst.execute(new String[] { SERVICE_URL1 });
}
#SuppressWarnings("deprecation")
public void no_net()
{
display( "No Network Connection");
final AlertDialog alertDialog = new AlertDialog.Builder(pdf.this).create();
alertDialog.setTitle("No Internet Connection");
alertDialog.setMessage("You don't have internet connection.\nElse please check the Internet Connection Settings.");
//alertDialog.setIcon(R.drawable.error_info);
alertDialog.setCancelable(false);
alertDialog.setButton("Close", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
alertDialog.cancel();
pdf.this.finish();
System.exit(0);
}
});
alertDialog.setButton2("Use Local DataBase", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
display( "Accessing local DataBase.....");
alertDialog.cancel();
}
});
alertDialog.show();
}
private class WebServiceTask extends AsyncTask<String, Integer, String> {
public static final int POST_TASK = 1;
private static final String TAG = "WebServiceTask";
// connection timeout, in milliseconds (waiting to connect)
private static final int CONN_TIMEOUT = 3000;
// socket timeout, in milliseconds (waiting for data)
private static final int SOCKET_TIMEOUT = 5000;
private int taskType = POST_TASK;
private Context mContext = null;
private String processMessage = "Processing...";
private ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
private ProgressDialog pDlg = null;
public WebServiceTask(int taskType, Context mContext, String processMessage) {
this.taskType = taskType;
this.mContext = mContext;
this.processMessage = processMessage;
}
public void addNameValuePair1(String name, String value) {
params.add(new BasicNameValuePair(name, value));
}
#SuppressWarnings("deprecation")
private void showProgressDialog() {
pDlg = new ProgressDialog(mContext);
pDlg.setMessage(processMessage);
pDlg.setProgressDrawable(mContext.getWallpaper());
pDlg.setProgressStyle(ProgressDialog.STYLE_SPINNER);
pDlg.setCancelable(false);
pDlg.show();
}
#Override
protected void onPreExecute() {
showProgressDialog();
}
protected String doInBackground(String... urls) {
String url = urls[0];
String result = "";
HttpResponse response = doResponse(url);
if (response == null) {
return result;
} else {
try {
result = inputStreamToString(response.getEntity().getContent());
} catch (IllegalStateException e) {
Log.e(TAG, e.getLocalizedMessage(), e);
} catch (IOException e) {
Log.e(TAG, e.getLocalizedMessage(), e);
}
}
return result;
}
#Override
protected void onPostExecute(String response) {
handleResponse(response);
pDlg.dismiss();
}
// Establish connection and socket (data retrieval) timeouts
private HttpParams getHttpParams() {
HttpParams htpp = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(htpp, CONN_TIMEOUT);
HttpConnectionParams.setSoTimeout(htpp, SOCKET_TIMEOUT);
return htpp;
}
private HttpResponse doResponse(String url) {
// Use our connection and data timeouts as parameters for our
// DefaultHttpClient
HttpClient httpclient = new DefaultHttpClient(getHttpParams());
HttpResponse response = null;
try {
switch (taskType) {
case POST_TASK:
HttpPost httppost = new HttpPost(url);
// Add parameters
httppost.setEntity(new UrlEncodedFormEntity(params));
response = httpclient.execute(httppost);
break;
}
} catch (Exception e) {
display("Remote DataBase can not be connected.\nPlease check network connection.");
Log.e(TAG, e.getLocalizedMessage(), e);
return null;
}
return response;
}
private String inputStreamToString(InputStream is) {
String line = "";
StringBuilder total = new StringBuilder();
// Wrap a BufferedReader around the InputStream
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
try {
// Read response until the end
while ((line = rd.readLine()) != null) {
total.append(line);
}
} catch (IOException e) {
Log.e(TAG, e.getLocalizedMessage(), e);
}
// Return full string
return total.toString();
}
}
public void handleResponse(String response)
{ //display("JSON responce is : "+response);
if(!response.equals(""))
{
try {
JSONObject jso = new JSONObject(response);
int UName = jso.getInt("status1");
if(UName==1)
{
String status = jso.getString("status");
ret=status.substring(13,status.length()-2);
todoItems.add(0, status);
aa.notifyDataSetChanged();
}
else if(UName==-1)
{
String status = jso.getString("status");
//display(status);
Intent intObj=new Intent(pdf.this,Webview.class);
intObj.putExtra("USERNAME", status);
startActivity(intObj);
}
else
{
// int count=Integer.parseInt(UName);
// display("Number of Projects have been handling in AFL right now: "+count);
list1=new ArrayList<String>();
JSONArray array=jso.getJSONArray("reps1");
for(int i=0;i<array.length();i++)
{
list1.add(array.getJSONObject(i).getString("pdfName"));
}
itr=list1.iterator();
while(itr.hasNext())
{
//str1=itr.next()+"\n";
todoItems.add(0, itr.next().toString());
aa.notifyDataSetChanged();
}
//tv1.setText(str1);
}
} catch (Exception e) {
Log.e(TAG, e.getLocalizedMessage(), e);
return;
}
}
else
{
display("unable to reach the server");
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.activity_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.home:
Intent intObj=new Intent(pdf.this, MainActivity.class);
intObj.putExtra("finish", true); // if you are checking for this in your other Activities
intObj.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
Intent.FLAG_ACTIVITY_CLEAR_TASK |
Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intObj);
//pdf.this.finish();
finish();
return (true);
}
return super.onOptionsItemSelected(item);
}
}
I'm trying to get the data from the database for which I created a php file. It returns the name as the reply to the call. the website it Ensignweb
the program code goes like this.
The php file is like this
<?php
$connect = mysql_connect("localhost","databasename","password");
mysql_select_db("ews_app");
$query = mysql_query("select name from comment");
if(!empty($query)){
if(mysql_num_rows($query)>0){
WHILE($row=mysql_fetch_array($query)):
$comment = array();
$comment["name"] = $row['name'];
echo "$comment<br>";
echo json_encode($comment);
echo "<br>";
endwhile;
}
}
?>
The java code goes like this:
import java.io.IOException;
import java.io.Reader;
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.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
TextView httpStuff;
HttpClient client;
JSONObject json;
final static String URL = "http://www.ensignweb.com/sandbox/app/comment11.php";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
httpStuff = (TextView) findViewById(R.id.data);
client = new DefaultHttpClient();
new Read().execute("name");
}
public JSONObject lastTweet() throws ClientProtocolException,IOException,JSONException{
StringBuilder url = new StringBuilder(URL);
HttpGet get = new HttpGet(url.toString());
HttpResponse r = client.execute(get);
int status = r.getStatusLine().getStatusCode();//return 200 if execution is success
if(status==200){
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONArray timeline = new JSONArray(data);
JSONObject last = timeline.getJSONObject(0);
return last;
}else{
Toast.makeText(MainActivity.this, "error", Toast.LENGTH_LONG);
return null;
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public class Read extends AsyncTask<String, Integer, String>{
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
try {
json = lastTweet();
return json.toString();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
httpStuff.setText(result);
}
}
}
But It is not displaying the json reply. I'm stucked in it from past few days.
Please help me out of it. I really need it.