Not getting the output

Not getting the output - android

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.

Related

JSON Parse Crash

I'm not sure what I'm doing wrong. I was trying to follow a YouTube tutorial somewhat, but it always says "Unfortunately, (APP NAME) has stopped". I want it to update with the latest bitcoin price when I hit the button.
import java.io.IOException;
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.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
TextView price;
HttpClient client;
Button refreshPriceButton;
JSONObject json;
final static String URL = "http://api.coindesk.com/v1/bpi/currentprice.json";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
price = (TextView) findViewById(R.id.tvPrice);
refreshPriceButton = (Button) findViewById(R.id.bJSON);
client = new DefaultHttpClient();
refreshPriceButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
new Read().execute("rate");
}
});
}
public JSONObject price() throws ClientProtocolException, IOException, JSONException {
StringBuilder url = new StringBuilder(URL);
JSONObject coinPrice = null;
HttpGet get = new HttpGet(url.toString());
HttpResponse r = client.execute(get);
int status = r.getStatusLine().getStatusCode();
if(status==200) {
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONArray coin = new JSONArray(data);
coinPrice = coin.getJSONObject(0);
Toast.makeText(MainActivity.this, "success", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(MainActivity.this, "error", Toast.LENGTH_LONG).show();
}
return coinPrice;
}
public class Read extends AsyncTask<String, Integer, String> {
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
try {
json = price();
return json.getString(params[0]);
} 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
price.setText(result);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
It is giving me these errors in the logcat:
http://i.imgur.com/BPyGtrh.png
and
http://i.imgur.com/owmROLF.png

Check your http://i.imgur.com/BPyGtrh.png logcat in the 4 last line, you need add the permissions to Manifest.xml
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

how to extract html code from webview

this is my code ...... i cant resolve the error..
import java.io.IOException;
import java.net.URI;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.util.EntityUtils;
import android.annotation.SuppressLint;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.webkit.WebViewClient;
#SuppressLint("SetJavaScriptEnabled")
public class Social_media extends Fragment {
private String getDownloadButtonOnly(String url){
URI http ;
HttpGet pageGet = new HttpGet ( "http://visiblenews.com/category/gadgets/");
ResponseHandler<String> handler = new ResponseHandler<String>() {
public String handleResponse1(HttpResponse response) throws ClientProtocolException, IOException {
HttpEntity entity = response.getEntity();
String html;
if (entity != null) {
html = EntityUtils.toString(entity);
return html;
}else {
return null;
}
}
#Override
public String handleResponse(HttpResponse response)
throws ClientProtocolException, IOException {
// TODO Auto-generated method stub
return null;
}
};
Object pageHTML = null;
try {
while (pageHTML==null){
Object client;
pageHTML = ((Object) client).execute(pageGet, handler);
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Pattern pattern = Pattern.compile("<h2>Direct Down.+?</h2>(</div>)*(.+?)<.+?>", Pattern.DOTALL);
Matcher matcher = pattern.matcher((CharSequence) pageHTML);
String displayHTML = null;
while(matcher.find()){
displayHTML = matcher.group();
}
return displayHTML;
}
public void customizeWebView(final ServiceCommunicableActivity activity, final WebView webview, final SearchResult mRom) {
mRom.setFileSize(getFileSize(mRom.getURLSuffix()));
webview.getSettings().setJavaScriptEnabled(true);
}
private Object getFileSize(Object urlSuffix) {
// TODO Auto-generated method stub
return null;
}};
error log is ..
Description Resource Path Location Type
The method execute(HttpGet, ResponseHandler) is undefined for the type Object Social_media.java /TabsWithSwipeGesture/src/info/androidhive/tabsswipe line 62 Java Problem

Object has no execute() method. You are supposed to use a HttpClient instance. Further I wonder what you want with pageHtml (and the loop there) as the html page will be availabel in `handleResponse'. Further the title of your post is strange as there is no WebView involved here.

How to send and receive data between flask framework web server and android app

I am unable to communicate to receive and send reply between the web server(which uses flask framework) and my android app whose code is as shown below.
If possible can you please post a sample server end code which might solve my problem.
package com.project.nsj;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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 android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
String userName, passkey;
EditText username, password;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
username = (EditText) findViewById(R.id.username);
password = (EditText) findViewById(R.id.password);
Button login = (Button) findViewById(R.id.login_button);
login.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
//checkLogin login = new checkLogin();
//login.execute();
Intent funcs = new Intent(MainActivity.this, Functions.class);
startActivity(funcs);
}
});
}
public class checkLogin extends AsyncTask<Void, Void, Integer> {
#Override
protected Integer doInBackground(Void... params) {
userName = username.getText().toString();
passkey = password.getText().toString();
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("http://rpihomeautomation.no-ip.biz");
List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2);
nameValuePair.add(new BasicNameValuePair("username", userName));
nameValuePair.add(new BasicNameValuePair("passkey", passkey));
try {
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
HttpResponse response;
int status = 0;
try {
response = httpClient.execute(httpPost);
status = response.getStatusLine().getStatusCode();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return status;
}
#Override
protected void onPostExecute(Integer result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if (result == 200) {
Intent funcs = new Intent(MainActivity.this, Functions.class);
startActivity(funcs);
} else {
Toast.makeText(MainActivity.this, "Invalid password/username",
Toast.LENGTH_LONG).show();
}
}
}
}

The simplest case for handling a HTTP POST request is:
from flask import Flask, request
app = Flask(__name__)
#app.route("/data", method=("POST",))
def handle_data():
return "Hello World - you sent me " + str(request.values)
if __name__ == '__main__':
app.run()

HttpResponse.execute() throws exception

I'm trying to develop a simple app that gets data from web service and displays it
It throws exception exactly when he calls response.execute(client)
package com.example.webbasedapp;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URI;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.util.Log;
public class GETMethods {
public String getInternetData() throws Exception{
BufferedReader in=null;
String Data=null;
try{
HttpClient client=new DefaultHttpClient();
URI web=new URI("http://www.mybringback.com/");
HttpGet request = new HttpGet();
request.setURI(web);
HttpResponse reponse=client.execute(request);
Log.v("response code", reponse.getStatusLine()
.getStatusCode() + "");
InputStream inp=reponse.getEntity().getContent();
in=new BufferedReader(new InputStreamReader(inp));
StringBuffer buf=new StringBuffer();
String l="";
String nl=System.getProperty("line.separator");
while((l=in.readLine())!=null){
buf.append(l+nl);
}
in.close();
Data=buf.toString();
return Data;
}finally{
if(in!=null){
try{
in.close();
return Data;
}catch (Exception e){
Log.d("error",e.toString());
}
}
}
}
}
And this is my main activity
package com.example.webbasedapp;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;
public class Home extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
TextView test = (TextView) findViewById(R.id.data);
GETMethods data = new GETMethods();
String d = null;
try {
d = data.getInternetData();
// test.setText(d);
} catch (Exception e) {
// TODO Auto-generated catch block
d = "bla";
Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT).show();
// Log.d("testW",e.getMessage());
}
test.setText(d);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.home, menu);
return true;
}
}

You are attempting to access the network on the UI thread which is not allowed due to potential hangup issues. Look into AysncTask and implement GETMethods as one of them. It will look something like this:
public class GETMethods extends AsyncTask<String, Void, String>{
protected void doInBackground(String... params){
YourNetworkCode
}
}

wrong in json parsing

please help me to find the error in this code.
I want to get some data from remote server (php & mysql) by json then parsing it
the problem is that result returns null but it is supposed to return name at this link :
http://codeincloud.tk/json_android_example.php
package com.shadatv.shada;
import java.io.IOException;
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.widget.TextView;
import android.widget.Toast;
public class canticlesActivity extends Activity {
TextView httpStuff;
HttpClient client;
JSONObject json;
final static String URL = "http://codeincloud.tk/json_android_example.php";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.canticles);
httpStuff = (TextView) findViewById(R.id.textView1);
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();
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(getBaseContext(), "error", Toast.LENGTH_SHORT);
return null;
}
}
public class Read extends AsyncTask<String, Integer, String>{
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
try {
json = lastTweet();
return json.getString(params[0]);
} 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
Toast.makeText(getBaseContext(), "ahmed .. " + result, Toast.LENGTH_LONG).show();
httpStuff.setText(result);
}
}
}

parse current json String as :
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
// convert data to json object
JSONObject last =new JSONObject(data);
because current webservice retuning an JSONObject only instead of JSONArray

Your URL provides the following data:
{"name":"Froyo","version":"Android 2.2"}
The chunk of code parsing the JSON is the following:
JSONArray timeline = new JSONArray(data);
JSONObject last = timeline.getJSONObject(0);
That makes the assumption that the JSON document you're reading is an Array instead of an Object. (Either is valid JSON, but the document you're fetching is quite clearly an Object). Web service calls may not always be returning one or the other so you'll have to take care that you're parsing against the correct type.

copy and past now it is working.
i changed JSONObject last =new JSONObject(data);
because http://codeincloud.tk/json_android_example.php retuning an JSONObject
package com.shadatv.shada;
import java.io.IOException;
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.widget.TextView;
import android.widget.Toast;
public class canticlesActivity extends Activity {
TextView httpStuff;
HttpClient client;
JSONObject json;
final static String URL = "http://codeincloud.tk/json_android_example.php";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.canticles);
httpStuff = (TextView) findViewById(R.id.textView1);
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();
if (status == 200) {
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
JSONObject last = new JSONObject(data);
return last;
} else {
Toast.makeText(getBaseContext(), "error", Toast.LENGTH_SHORT);
return null;
}
}
public class Read extends AsyncTask<String, Integer, String>{
#Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
try {
json = lastTweet();
return json.getString(params[0]);
} 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
Toast.makeText(getBaseContext(), "ahmed .. " + result, Toast.LENGTH_LONG).show();
httpStuff.setText(result);
}
}
}

Better to use GSON Library which is much simpler then doing manual parsing.
Link for the library is : http://code.google.com/p/google-gson/

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Not getting the output - android

Related

JSON Parse Crash

how to extract html code from webview

How to send and receive data between flask framework web server and android app

HttpResponse.execute() throws exception

wrong in json parsing

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