Get all brands of cameras that Flickr knows about, using Flickr API.

Flickr Service provide API of flickr.cameras.getBrands, returns all the brands of cameras that Flickr knows about. It's a exercise to show how to access Flickr API using HttpClient(QueryFlickr() method), and parse the returned JSON(ParseJSON_getBrands() method).

MainActivity.java. You have to insert your own Flickr API Key in Flickr_KEY.

package com.example.androidflickrcameras;

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.os.AsyncTask;
import android.os.Bundle;
import android.widget.TextView;
import android.app.Activity;

public class MainActivity extends Activity {
 
 /*
  * Example of Flickr API, flickr.cameras.getBrands
  * http://api.flickr.com/services/rest/?method=flickr.cameras.getBrands&api_key=0532aeeb07bd212823a343a9194b8501&format=json&nojsoncallback=1
  */
 
 final static String Flickr_KEY = "insert your Flickr API key here";
 final static String Flickr_SECRET = "ba967558b9797793";
 final static String subUrl_Flickr = "http://api.flickr.com/services/rest/?";
 final static String subUrl_method_getBrands = "flickr.cameras.getBrands";
 final static String url_FlickrApi_getBrands 
   = subUrl_Flickr
   + "method=" + subUrl_method_getBrands
   + "&api_key=" + Flickr_KEY
   + "&format=json&nojsoncallback=1";

 TextView tvResult;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  tvResult = (TextView)findViewById(R.id.result);

  new MyTask().execute();
 }

 private String QueryFlickr(String q){
  String qResult = null;
  HttpClient httpClient = new DefaultHttpClient();
  HttpGet httpGet = new HttpGet(q);
  
  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_getBrands(String json){
  String jResult = null;
  
  try {
   JSONObject JsonObject = new JSONObject(json);
   JSONObject Json_brands = JsonObject.getJSONObject("brands");
   JSONArray JsonArray_brand = Json_brands.getJSONArray("brand");
  
   jResult = "";
   for(int i = 0; i < JsonArray_brand.length(); i++){
    JSONObject jsonObjectBrand = JsonArray_brand.getJSONObject(i);
    jResult += "id: " + jsonObjectBrand.getString("id") + "\n"
      + "name: " + jsonObjectBrand.getString("name") +"\n\n";
    
   }
   
  } catch (JSONException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  return jResult;
 }
 
 private class MyTask extends AsyncTask<Void, Void, Void>{
  
  String flickrReturn;
  String parsedFlickrReturn;

  @Override
  protected Void doInBackground(Void... arg0) {
   flickrReturn = QueryFlickr(url_FlickrApi_getBrands);
   parsedFlickrReturn = ParseJSON_getBrands(flickrReturn);
   return null;
  }

  @Override
  protected void onPostExecute(Void result) {
   if(parsedFlickrReturn == null){
    tvResult.setText("Fail!");
   }else{
    tvResult.setText(parsedFlickrReturn);
   }
  }

 }

}

Layout

<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    <ScrollView 
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <TextView 
            android:id="@+id/result"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    </ScrollView>
    

</LinearLayout>

Permission of "android.permission.INTERNET" is needed.

Download the files.

Related:
- Get all the models for a given camera brand, using Flickr API.