JSON Tutorial with listview activitymain.xml <Rela...
JSON Tutorial with listview
activitymain.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="250dp"
android:layout_alignParentBottom="true"
android:layout_alignParentTop="true" >
</ListView>
<LinearLayout
android:id="@+id/lv1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_marginBottom="14dp"
android:orientation="vertical" >
<TextView
android:id="@+id/tv0"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:textSize="13sp"
android:textStyle="bold" />
<TextView
android:id="@+id/tv1"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:textSize="13sp"
android:textStyle="bold" />
<TextView
android:id="@+id/tv2"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:textSize="13sp"
android:textStyle="bold" />
<TextView
android:id="@+id/tv3"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:textSize="13sp"
android:textStyle="bold" />
<TextView
android:id="@+id/tv4"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:textSize="13sp"
android:textStyle="bold" />
<TextView
android:id="@+id/tv5"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:textSize="13sp"
android:textStyle="bold" />
<TextView
android:id="@+id/tv6"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:textSize="13sp"
android:textStyle="bold" />
</LinearLayout>
</RelativeLayout>
display.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/tv0"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:textSize="20sp"
android:text="text"
android:textStyle="bold"
/>
<TextView
android:id="@+id/tv1"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:text="text"
android:textSize="20sp"
android:textStyle="bold"
/>
<TextView
android:id="@+id/tv2"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:text="text"
android:textColor="#43bd00"
android:textSize="20sp"
android:textStyle="bold"
/>
<TextView
android:id="@+id/tv3"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:textColor="#43bd00"
android:text="text"
android:textSize="20sp"
android:textStyle="bold"
/>
<TextView
android:id="@+id/tv4"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:text="text"
android:textColor="#43bd00"
android:textSize="16sp"
android:textStyle="bold"
/>
<TextView
android:id="@+id/tv5"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:text="text"
android:textColor="#43bd00"
android:textSize="16sp"
android:textStyle="bold"
/>
<TextView
android:id="@+id/tv6"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:paddingBottom="2dip"
android:paddingTop="6dip"
android:text="text"
android:textColor="#43bd00"
android:textSize="16sp"
android:textStyle="bold" />
</LinearLayout>
JSONParser.java
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
public class JSONParser {
static String response = null;
public final static int GET = 1;
public final static int POST = 2;
public JSONParser() {
}
/**
* Making service call
* @url - url to make request
* @method - http request method
* */
public String makeServiceCall(String url, int method) {
return this.makeServiceCall(url, method, null);
}
/**
* Making service call
* @url - url to make request
* @method - http request method
* @params - http request params
* */
public String makeServiceCall(String url, int method,
List<NameValuePair> params) {
try {
// http client
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
// Checking http request method type
if (method == POST) {
HttpPost httpPost = new HttpPost(url);
// adding post params
if (params != null) {
httpPost.setEntity(new UrlEncodedFormEntity(params));
}
httpResponse = httpClient.execute(httpPost);
} else if (method == GET) {
// appending params to url
if (params != null) {
String paramString = URLEncodedUtils
.format(params, "utf-8");
url += "?" + paramString;
}
HttpGet httpGet = new HttpGet(url);
httpResponse = httpClient.execute(httpGet);
}
httpEntity = httpResponse.getEntity();
response = EntityUtils.toString(httpEntity);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
}
MainActivity.java
import java.util.ArrayList;
import java.util.HashMap;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
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.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends Activity {
private static final String TAG_EQID= "eqid";
private static final String TAG_MAGNITUDE = "magnitude";
private static final String TAG_LNG = "lng";
private static final String TAG_SRC = "src";
private static final String TAG_DATETIME= "datetime";
private static final String TAG_DEPTH = "depth";
private static final String TAG_LAT = "lat";
ListView list;
ProgressDialog pdialog;
public String url = "http://api.geonames.org/earthquakesJSON?north=44.1&south=-9.9&east=-22.4&west=55.2&username=demo";
static ArrayList<HashMap<String, String>> webdata = new ArrayList<HashMap<String, String>>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list = (ListView) findViewById(R.id.list);
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
Intent in = new Intent(getApplicationContext(), Selected.class);
in.putExtra("position", position);
startActivity(in);
}
});
new GetData().execute();
}
private class GetData extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pdialog = new ProgressDialog(MainActivity.this);
pdialog.setMessage("Please Wait...");
pdialog.setCancelable(false);
pdialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
JSONParser jp = new JSONParser();
String jsonStr = jp.makeServiceCall(url, JSONParser.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jobj = new JSONObject(jsonStr);
JSONArray jarray = jobj.getJSONArray("earthquakes");
for (int i = 0; i < jarray.length(); i++) {
JSONObject jobjin = jarray.getJSONObject(i);
String eqid = jobjin.getString(TAG_EQID);
String magnitude = jobjin.getString(TAG_MAGNITUDE);
String lng = jobjin.getString(TAG_LNG);
String src = jobjin.getString(TAG_SRC);
String datetime = jobjin.getString(TAG_DATETIME);
String depth = jobjin.getString(TAG_DEPTH);
String lat = jobjin.getString(TAG_LAT);
HashMap<String, String> adding = new HashMap<String, String>();
adding.put(TAG_EQID, eqid);
adding.put(TAG_MAGNITUDE, magnitude);
adding.put(TAG_LNG, lng);
adding.put(TAG_SRC, src);
adding.put(TAG_DATETIME, datetime);
adding.put(TAG_DEPTH, depth);
adding.put(TAG_LAT, lat);
webdata.add(adding);
}
} catch (JSONException e) {
e.printStackTrace();
// TODO: handle exception
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if (pdialog.isShowing()) {
pdialog.dismiss();
}
Filllist();
}
}
public void Filllist() {
// TODO Auto-generated method stub
Cus adapter = new Cus();
list.setAdapter(adapter);
}
private class Cus extends BaseAdapter {
@Override
public int getCount() {
// TODO Auto-generated method stub
return webdata.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
String s1, s2, s3, s4, s5, s6,s7;
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView= inflater.inflate(R.layout.display, null);
}
TextView tv0 = (TextView) convertView.findViewById(R.id.tv0);
TextView tv1 = (TextView) convertView.findViewById(R.id.tv1);
TextView tv2 = (TextView) convertView.findViewById(R.id.tv2);
TextView tv3 = (TextView) convertView.findViewById(R.id.tv3);
TextView tv4 = (TextView) convertView.findViewById(R.id.tv4);
TextView tv5 = (TextView) convertView.findViewById(R.id.tv5);
TextView tv6 = (TextView) convertView.findViewById(R.id.tv6);
s1 = webdata.get(position).get(TAG_EQID).toString();
s2 = webdata.get(position).get(TAG_MAGNITUDE).toString();
s3 = webdata.get(position).get(TAG_LNG).toString();
s4 = webdata.get(position).get(TAG_SRC).toString();
s5 = webdata.get(position).get(TAG_DATETIME).toString();
s6 = webdata.get(position).get(TAG_DEPTH).toString();
s7 = webdata.get(position).get(TAG_LAT).toString();
tv0.setText("eqid : " + s1);
tv1.setText("magnitude : " + s2);
tv2.setText("lng : " + s3);
tv3.setText("src : " + s4);
tv4.setText("datetime : " + s5);
tv5.setText("depth : " + s6);
tv6.setText("lat" + s7);
return convertView;
}
}
}
Selected.java
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
public class Selected extends Activity {
String s1, s2, s3, s4, s5, s6, s7;
TextView eqid, magnitude, lng, src, datetime, depth, lat;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent i = getIntent();
Integer pot = i.getIntExtra("position", 0);
s1 = MainActivity.webdata.get(pot).get("eqid").toString();
s2 = MainActivity.webdata.get(pot).get("magnitude").toString();
s3 = MainActivity.webdata.get(pot).get("lng").toString();
s4 = MainActivity.webdata.get(pot).get("src").toString();
s5 = MainActivity.webdata.get(pot).get("datetime").toString();
s6 = MainActivity.webdata.get(pot).get("depth").toString();
s7 = MainActivity.webdata.get(pot).get("lat").toString();
eqid.setText("Email : " + s1);
magnitude.setText("Address : " + s2);
lng.setText("Gender : " + s3);
src.setText("Mobile : " + s4);
datetime.setText("Home : " + s5);
depth.setText("Office : " + s6);
lat.setText("Office : " + s7);
}
}
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