Android Open Source - GridImageSearch Search Activity

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License

The source code is released under:

Copyright (c) 2014 Keithen Hayenga Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the So...

Java Source Code

package com.codepath.gridimagesearch;
//from  w ww.  ja v  a 2 s . c  o  m
import java.util.ArrayList;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.Spinner;
import android.widget.TextView;

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.JsonHttpResponseHandler;

public class SearchActivity extends Activity {
  EditText etQuery;
  GridView gvResults;
  Button btnSearch;
  ArrayList<ImageResult> imageResults = new ArrayList<ImageResult>();
  ImageResultArrayAdapter imageAdapter;

  // Options strings must match valid strings for Google API (see GridSearchPrefs).
  String stImageSizeOption = "";
  String stImageColorOption = "";
  String stImageTypeOption = "";
  String stImageDomainOption = "";


  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_search);
    setupViews();
    imageAdapter = new ImageResultArrayAdapter(this, imageResults);
    gvResults.setAdapter(imageAdapter);
    gvResults.setOnItemClickListener(new OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Intent i = new Intent(getApplicationContext(), ImageDisplayActivity.class);
        ImageResult imageResult = imageResults.get(position);
        i.putExtra("result", imageResult);
        startActivity(i);
      }

    });

    // Attach the listener to the AdapterView onCreate
    gvResults.setOnScrollListener(new EndlessScrollListener() {
      @Override
      public void onLoadMore(int page, int totalItemsCount) {
        // Triggered only when new data needs to be appended to the list
        // Add whatever code is needed to append new items to your AdapterView
        customLoadMoreDataFromApi(page); 
        // or customLoadMoreDataFromApi(totalItemsCount); 
      }
    });
  }


  public void setupViews() {
    etQuery = (EditText) findViewById(R.id.etQuery);
    gvResults = (GridView) findViewById(R.id.gvResults);
    btnSearch = (Button) findViewById(R.id.btnSearch);
  }


  // Append more data into the adapter
  public void customLoadMoreDataFromApi(int offset) {
    // This method probably sends out a network request and appends new data items to your adapter. 
    // Use the offset value and add it as a parameter to your API request to retrieve paginated data.
    // Deserialize API response and then construct new objects to append to the adapter
    int iNewStart = (offset - 1) * 8;

    String query = etQuery.getText().toString();

    // Build string we want to search for using a.concat(b)
    // https://ajax.googleapis.com/ajax/services/search/images?v=1.0&q=android
    String stGoogleImageSearch = "https://ajax.googleapis.com/ajax/services/search/images?rsz=8"
        + "&start=" + iNewStart;

    if ((stImageSizeOption != null) && !(stImageSizeOption.equals("")))
      stGoogleImageSearch = stGoogleImageSearch.concat("&imgsz=" + stImageSizeOption);

    if ((stImageColorOption != null) && !(stImageColorOption.equals("")))
      stGoogleImageSearch = stGoogleImageSearch.concat("&imgcolor=" + stImageColorOption);

    if ((stImageTypeOption != null) && !(stImageTypeOption.equals("")))
      stGoogleImageSearch = stGoogleImageSearch.concat("&imgtype=" + stImageTypeOption);

    if ((stImageDomainOption != null) && !(stImageDomainOption.equals("")))
      stGoogleImageSearch = stGoogleImageSearch.concat("&as_sitesearch=" + stImageDomainOption);

    stGoogleImageSearch = stGoogleImageSearch.concat("&v=1.0&q=" + Uri.encode(query));

    Log.d("DEBUG", "scrolling stGoogleImageSearch = " + stGoogleImageSearch);

    AsyncHttpClient client = new AsyncHttpClient();
    client.get(stGoogleImageSearch,
        new JsonHttpResponseHandler() {
      @Override
      public void onSuccess(JSONObject response) {
        JSONArray imageJsonResults = null;
        try {
          imageJsonResults = response.getJSONObject("responseData").
              getJSONArray("results");
          imageAdapter.addAll(ImageResult.fromJSONArray(imageJsonResults));
          Log.d("DEBUG", imageResults.toString());

        } catch(JSONException e) {
          e.printStackTrace();
        }  
      }
    });
  }  


  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.image_display, menu);
    return true;
  }


  private final int REQUEST_CODE = 120;

  public void onSettingsAction(MenuItem mi) {
    Intent i = new Intent(this, SearchOptionsActivity.class);
    i.putExtra("optionSize", stImageSizeOption); 
    i.putExtra("optionColor", stImageColorOption); 
    i.putExtra("optionType", stImageTypeOption);
    i.putExtra("optionDomain", stImageDomainOption);
    startActivityForResult(i, REQUEST_CODE);
  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK && requestCode == REQUEST_CODE) {
      // Extract name value from result extras
      stImageSizeOption = data.getExtras().getString("optionSize");
      stImageColorOption = data.getExtras().getString("optionColor");
      stImageTypeOption = data.getExtras().getString("optionType");
      stImageDomainOption = data.getExtras().getString("optionDomain");

      imageResults.clear();
      // Load 2 pages to get enough on screen to enable scrolling.
      customLoadMoreDataFromApi(1);
      customLoadMoreDataFromApi(2);
    }
  } 


  public void onImageSearch(View v) {
    imageResults.clear();
    // Load 2 pages to get enough on screen to enable scrolling.
    customLoadMoreDataFromApi(1);
    customLoadMoreDataFromApi(2);
  }
}

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