Android Open Source - JSON_example Main Activity

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License

The source code is released under:

Eclipse Public License - v 1.0 THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES RECI...

Java Source Code

package com.example.json_ex;
/*w w  w  .j a  v a2s .  co  m*/
import java.io.IOException;
import java.net.URISyntaxException;
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.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.inputmethod.InputMethodManager;
import android.widget.SearchView;
import android.widget.SearchView.OnQueryTextListener;
import android.widget.TextView;
import android.widget.Toast;


public class MainActivity extends Activity implements OnQueryTextListener {
  
  TextView fetchText;
  String user_search_term = "";
  SearchView searchView;
  
  HttpClient client;
  final static String URL = "http://itunes.apple.com/search?term=";
  JSONObject json;
  InputMethodManager imm;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    fetchText = (TextView) findViewById(R.id.fetchText);
    
    client = new DefaultHttpClient();
    
    imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
      
    
    searchView = (SearchView) findViewById(R.id.searchView);
    searchView.setOnQueryTextListener(this);
    searchView.setSubmitButtonEnabled(true);
        
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }

  
  public JSONObject search( String searchItem ) throws ClientProtocolException, IOException, JSONException, URISyntaxException{
    String r_searchItem = searchItem.replaceAll("\\s+","");
    StringBuilder url = new StringBuilder(URL);
    url.append(r_searchItem);
    
    String finished_url = url.toString();
    
    HttpGet get = new HttpGet(finished_url);
    HttpResponse r = client.execute(get);
    
    int status = r.getStatusLine().getStatusCode();
    
    if (status == 200){
      HttpEntity e = r.getEntity();
      String data = EntityUtils.toString(e);
      JSONObject json = new JSONObject(data);
      return json;
    }else{
      Log.e("Search","fetch error");
      return null;
    }
    
    
  }
  
  public class Read extends AsyncTask<String, Integer, JSONObject>{

    @Override
    protected JSONObject doInBackground(String... params) {
      try {
        json = search(params[0]);
        return json;
      } catch (ClientProtocolException e) {
        e.printStackTrace();
      } catch (IOException e) {
        e.printStackTrace();
      } catch (JSONException e) {
        e.printStackTrace();
      } catch (URISyntaxException e) {
        e.printStackTrace();
      }
      return null;
    }

    @Override
    protected void onPostExecute(JSONObject fullArray) {
      String TAG_searched = "trackCensoredName";
      StringBuilder result = new StringBuilder();
      try {
        JSONArray array = fullArray.getJSONArray("results"); // first name in object
        for (int i = 0; i < array.length(); i++){
          JSONObject resultEntry = array.getJSONObject(i);
          result.append(String.valueOf(i+1)+". "+String.valueOf(resultEntry.get(TAG_searched) + "\n")); // One item from object found
          
        }
        
      } catch (JSONException e1) {
        Log.e("onPost ArrayException", e1.getMessage());
        result.append("no information");
      }
      
      fetchText.setText(result.toString());
      
      
    }
    
  }

  @Override
  public boolean onQueryTextChange(String newText) {
    // TODO Auto-generated method stub
    return false;
  }

  @Override
  public boolean onQueryTextSubmit(String query) {
    if (haveNetworkConnection()){
      new Read().execute(query);
    }else{
      Toast.makeText(MainActivity.this, "No network signal found", Toast.LENGTH_SHORT).show();
    }

    imm.hideSoftInputFromWindow(searchView.getWindowToken(), 0);
    return false;
  }
  
  private boolean haveNetworkConnection() {

      ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
      NetworkInfo[] netInfo = cm.getAllNetworkInfo();
      for (NetworkInfo ni : netInfo) {
          if (ni.getTypeName().equalsIgnoreCase("WIFI"))
              if (ni.isConnected())
                  return true;
          if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
              if (ni.isConnected())
                  return true;
      }
      return false;
  }
  
  

}

Java Source Code List

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