NetworkingAndroidHttpClientJSON (basic)

MainActivity.java

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		final Button loadButton = (Button) findViewById(R.id.button1);
		loadButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				startActivity(new Intent(MainActivity.this,
						NetworkingAndroidHttpClientJSONActivity.class));
			}
		});
	}
}

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

final Button loadButton = (Button) findViewById(R.id.button1);

loadButton.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

startActivity(new Intent(MainActivity.this,

NetworkingAndroidHttpClientJSONActivity.class));

}

});

}

NetworkingAndroidHttpClientJSONActivity.java

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

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.impl.client.BasicResponseHandler;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;

import android.app.ListActivity;
import android.net.http.AndroidHttpClient;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.ArrayAdapter;

public class NetworkingAndroidHttpClientJSONActivity extends ListActivity {

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		new HttpGetTask().execute();
	}

	private class HttpGetTask extends AsyncTask<Void, Void, List<String>> {

		// Get your own user name at http://www.geonames.org/login
		private static final String USER_NAME = "indrawdev";

		private static final String URL = "http://api.geonames.org/earthquakesJSON?north=44.1&south=-9.9&east=-22.4&west=55.2&username="
				+ USER_NAME;

		AndroidHttpClient mClient = AndroidHttpClient.newInstance("");

		@Override
		protected List<String> doInBackground(Void... params) {
			HttpGet request = new HttpGet(URL);
			JSONResponseHandler responseHandler = new JSONResponseHandler();
			try {
				return mClient.execute(request, responseHandler);
			} catch (ClientProtocolException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return null;
		}

		@Override
		protected void onPostExecute(List<String> result) {
			if (null != mClient)
				mClient.close();
			setListAdapter(new ArrayAdapter<String>(
					NetworkingAndroidHttpClientJSONActivity.this,
					R.layout.list_item, result));
		}
	}

	private class JSONResponseHandler implements ResponseHandler<List<String>> {

		private static final String LONGITUDE_TAG = "lng";
		private static final String LATITUDE_TAG = "lat";
		private static final String MAGNITUDE_TAG = "magnitude";
		private static final String EARTHQUAKE_TAG = "earthquakes";

		@Override
		public List<String> handleResponse(HttpResponse response)
				throws ClientProtocolException, IOException {
			List<String> result = new ArrayList<String>();
			String JSONResponse = new BasicResponseHandler()
					.handleResponse(response);
			try {

				// Get top-level JSON Object - a Map
				JSONObject responseObject = (JSONObject) new JSONTokener(
						JSONResponse).nextValue();

				// Extract value of "earthquakes" key -- a List
				JSONArray earthquakes = responseObject
						.getJSONArray(EARTHQUAKE_TAG);

				// Iterate over earthquakes list
				for (int idx = 0; idx < earthquakes.length(); idx++) {

					// Get single earthquake data - a Map
					JSONObject earthquake = (JSONObject) earthquakes.get(idx);

					// Summarize earthquake data as a string and add it to
					// result
					result.add(MAGNITUDE_TAG + ":"
							+ earthquake.get(MAGNITUDE_TAG) + ","
							+ LATITUDE_TAG + ":"
							+ earthquake.getString(LATITUDE_TAG) + ","
							+ LONGITUDE_TAG + ":"
							+ earthquake.get(LONGITUDE_TAG));
				}
			} catch (JSONException e) {
				e.printStackTrace();
			}
			return result;
		}
	}
}

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import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

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.impl.client.BasicResponseHandler;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import org.json.JSONTokener;

import android.app.ListActivity;

import android.net.http.AndroidHttpClient;

import android.os.AsyncTask;

import android.os.Bundle;

import android.widget.ArrayAdapter;

public class NetworkingAndroidHttpClientJSONActivity extends ListActivity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

new HttpGetTask().execute();

}

private class HttpGetTask extends AsyncTask<Void, Void, List<String>> {

// Get your own user name at http://www.geonames.org/login

private static final String USER_NAME = "indrawdev";

private static final String URL = "http://api.geonames.org/earthquakesJSON?north=44.1&south=-9.9&east=-22.4&west=55.2&username="

+ USER_NAME;

AndroidHttpClient mClient = AndroidHttpClient.newInstance("");

@Override

protected List<String> doInBackground(Void... params) {

HttpGet request = new HttpGet(URL);

JSONResponseHandler responseHandler = new JSONResponseHandler();

try {

return mClient.execute(request, responseHandler);

} catch (ClientProtocolException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return null;

}

@Override

protected void onPostExecute(List<String> result) {

if (null != mClient)

mClient.close();

setListAdapter(new ArrayAdapter<String>(

NetworkingAndroidHttpClientJSONActivity.this,

R.layout.list_item, result));

}

private class JSONResponseHandler implements ResponseHandler<List<String>> {

private static final String LONGITUDE_TAG = "lng";

private static final String LATITUDE_TAG = "lat";

private static final String MAGNITUDE_TAG = "magnitude";

private static final String EARTHQUAKE_TAG = "earthquakes";

@Override

public List<String> handleResponse(HttpResponse response)

throws ClientProtocolException, IOException {

List<String> result = new ArrayList<String>();

String JSONResponse = new BasicResponseHandler()

.handleResponse(response);

try {

// Get top-level JSON Object - a Map

JSONObject responseObject = (JSONObject) new JSONTokener(

JSONResponse).nextValue();

// Extract value of "earthquakes" key -- a List

JSONArray earthquakes = responseObject

.getJSONArray(EARTHQUAKE_TAG);

// Iterate over earthquakes list

for (int idx = 0; idx < earthquakes.length(); idx++) {

// Get single earthquake data - a Map

JSONObject earthquake = (JSONObject) earthquakes.get(idx);

// Summarize earthquake data as a string and add it to

// result

result.add(MAGNITUDE_TAG + ":"

+ earthquake.get(MAGNITUDE_TAG) + ","

+ LATITUDE_TAG + ":"

+ earthquake.getString(LATITUDE_TAG) + ","

+ LONGITUDE_TAG + ":"

+ earthquake.get(LONGITUDE_TAG));

}

} catch (JSONException e) {

e.printStackTrace();

}

return result;

}

activity_main.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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/load_data_string" >
    </Button>

</RelativeLayout>

<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"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context=".MainActivity" >

<Button

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/load_data_string" >

</Button>

</RelativeLayout>

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="10dp"
    android:textSize="24sp" >
</TextView>

<?xml version="1.0" encoding="utf-8"?>

<TextView xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:padding="10dp"

android:textSize="24sp" >

</TextView>