package com.exercise.AndroidFlickr;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import org.apache.http.HttpEntity;
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.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class AndroidFlickrActivity extends Activity {
/*
* FlickrQuery = FlickrQuery_url
* + FlickrQuery_per_page
* + FlickrQuery_nojsoncallback
* + FlickrQuery_format
* + FlickrQuery_tag + q
* + FlickrQuery_key + FlickrApiKey
*/
String FlickrQuery_url = "http://api.flickr.com/services/rest/?method=flickr.photos.search";
String FlickrQuery_per_page = "&per_page=1";
String FlickrQuery_nojsoncallback = "&nojsoncallback=1";
String FlickrQuery_format = "&format=json";
String FlickrQuery_tag = "&tags=";
String FlickrQuery_key = "&api_key=";
// Apply your Flickr API:
// www.flickr.com/services/apps/create/apply/?
String FlickrApiKey = "2155e9406043b7494453105eec99ae37";
EditText searchText;
Button searchButton;
TextView textQueryResult, textJsonResult;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
searchText = (EditText)findViewById(R.id.searchtext);
searchButton = (Button)findViewById(R.id.searchbutton);
textQueryResult = (TextView)findViewById(R.id.queryresult);
textJsonResult = (TextView)findViewById(R.id.jsonresult);
searchButton.setOnClickListener(searchButtonOnClickListener);
}
private Button.OnClickListener searchButtonOnClickListener
= new Button.OnClickListener(){
public void onClick(View arg0) {
// TODO Auto-generated method stub
String searchQ = searchText.getText().toString();
String searchResult = QueryFlickr(searchQ);
textQueryResult.setText(searchResult);
String jsonResult = ParseJSON(searchResult);
textJsonResult.setText(jsonResult);
}};
private String QueryFlickr(String q){
String qResult = null;
String qString =
FlickrQuery_url
+ FlickrQuery_per_page
+ FlickrQuery_nojsoncallback
+ FlickrQuery_format
+ FlickrQuery_tag + q
+ FlickrQuery_key + FlickrApiKey;
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(qString);
try {
HttpEntity httpEntity = httpClient.execute(httpGet).getEntity();
if (httpEntity != null){
InputStream inputStream = httpEntity.getContent();
Reader in = new InputStreamReader(inputStream);
BufferedReader bufferedreader = new BufferedReader(in);
StringBuilder stringBuilder = new StringBuilder();
String stringReadLine = null;
while ((stringReadLine = bufferedreader.readLine()) != null) {
stringBuilder.append(stringReadLine + "\n");
}
qResult = stringBuilder.toString();
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return qResult;
}
private String ParseJSON(String json){
String jResult = null;
try {
JSONObject JsonObject = new JSONObject(json);
JSONObject Json_photos = JsonObject.getJSONObject("photos");
JSONArray JsonArray_photo = Json_photos.getJSONArray("photo");
//We have only one photo in this exercise
JSONObject FlickrPhoto = JsonArray_photo.getJSONObject(0);
jResult = "\nid: " + FlickrPhoto.getString("id") + "\n"
+ "owner: " + FlickrPhoto.getString("owner") + "\n"
+ "secret: " + FlickrPhoto.getString("secret") + "\n"
+ "server: " + FlickrPhoto.getString("server") + "\n"
+ "farm: " + FlickrPhoto.getString("farm") + "\n"
+ "title: " + FlickrPhoto.getString("title") + "\n";
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return jResult;
}
}
Modify main.xml to add a TextView, jsonresult, to display the parsed JSON data.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<EditText
android:id="@+id/searchtext"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/searchbutton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Search"
/>
<TextView
android:id="@+id/queryresult"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<TextView
android:id="@+id/jsonresult"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
next:
- Load photo from Flickr
Related article:
- Get Time Zone of location, from web service of www.geonames.org
3 comments:
Mmm can u help me? I can't understand how to parse json type like this:
[
{
"id": 12,
"name": 12,
"status": "ok",
"volumes": [
{
"id": 17592,
"name": "root",
"status": "ok"
},
}
]
As you can see there is no named object at beginning, it's array with values 0,1,3 with subarray
hello Serj,
I think your JSON should be: {"id":12,"name":12,"status":"ok","volumes":[{"id":17592,"name":"root","status":"ok"}]}
Please read: Another example to parse JSON
Unfortunately I use the API provides an array of objects, my previous json not right, i edit it for e.g. I'm trying to figure out this json by myself. But the example of the output of this api can give a in a private.
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