Android Open Source - image-rover Search Activity

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From Project

Back to project page image-rover.

License

The source code is released under:

MIT License

Java Source Code

package com.codepath.wangela.apps.image;
/*www  . java 2 s .  com*/
import java.util.ArrayList;

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

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
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.CheckedTextView;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;

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

public class SearchActivity extends Activity {
  EditText etQuery;
  GridView gvResults;
  Button btnSearch;
  TextView tvFiltered;
  TextView tvClearFilters;
  private FilterSettings filters;
  RequestParams params = new RequestParams();
  ArrayList<ImageResult> imageResults = new ArrayList<ImageResult>();
  ImageResultArrayAdapter imageAdapter;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_search);
    filters = new FilterSettings();

    setupViews();

    imageAdapter = new ImageResultArrayAdapter(this, imageResults);
    gvResults.setAdapter(imageAdapter);
    gvResults.setOnScrollListener(new EndlessScrollListener() {

      @Override
      public void onLoadMore(int page, int totalItemsCount) {
        // Triggered only when new data needs to be appended to the list
        customLoadMoreDataFromApi(totalItemsCount);
        // or customLoadMoreDataFromApi(page);
      }
    });
    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);
      }

    });
  }

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

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

  private Boolean isNetworkAvailable() {
    // TODO Call this during onCreate or onImageSearch and handle network unavailable state
    ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetworkInfo = connectivityManager
        .getActiveNetworkInfo();
    return activeNetworkInfo != null
        && activeNetworkInfo.isConnectedOrConnecting();
  }

  public void onSettings(MenuItem mi) {
    Intent i = new Intent(this, FilterSettings.class);
    i.putExtra("filters", filters);
    startActivityForResult(i, 17);
  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == 17) {
      if (resultCode == RESULT_OK) {
        filters = (FilterSettings) data.getSerializableExtra("filters");
        params.put("imgsz", filters.getFilterSize());
        params.put("imgtype", filters.getFilterType());
        params.put("as_sitesearch", filters.getFilterSite());
        onImageSearch(btnSearch);
        tvFiltered.setVisibility(View.VISIBLE);
        tvClearFilters.setVisibility(View.VISIBLE);
      } else {
        params = null;
      }
    }
  }

  public void onImageSearch(View v) {
    imageAdapter.clear();
    String query = etQuery.getText().toString();
    Toast.makeText(this, "Searching for " + query, Toast.LENGTH_LONG)
        .show();
    AsyncHttpClient client = new AsyncHttpClient();
    params.put("q", Uri.encode(query));
    params.put("rsz", "8");
    params.put("v", "1.0");
    params.put("start", "0");
    // Google Image Search API standard URL is
    // https://ajax.googleapis.com/ajax/services/search/images + arguments
    client.get("https://ajax.googleapis.com/ajax/services/search/images?",
        params, 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());
              Log.d("PARAMS", params.toString());
            } catch (JSONException e) {
              e.printStackTrace();
            }
          }

          public void onFailure(Throwable e, JSONObject error) {
            // Handle the failure and alert the user to retry
            Log.e("FAILURE", e.toString());
          }
        });
  }
  
  public void onClear(View v) {
    // TODO reset filter settings
    tvFiltered.setVisibility(View.INVISIBLE);
    tvClearFilters.setVisibility(View.INVISIBLE);
    params.remove("imgsz");
    params.remove("imgtype");
    params.remove("as_sitesearch");
    onImageSearch(btnSearch);
  }

  // Append more data into the adapter for endless scrolling
  public void customLoadMoreDataFromApi(int offset) {
    // This method 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
    
    AsyncHttpClient client = new AsyncHttpClient();
    String offsetString = String.valueOf(offset);
    params.put("start", offsetString);
    client.get("https://ajax.googleapis.com/ajax/services/search/images?",
        params, new JsonHttpResponseHandler() {
          @Override
          public void onSuccess(JSONObject response) {
            JSONArray imageJsonResults = null;
            try {
              imageJsonResults = response.getJSONObject(
                  "responseData").getJSONArray("results");
              //imageAdapter.clear(); // don't clear on subsequent requests
              imageAdapter.addAll(ImageResult
                  .fromJSONArray(imageJsonResults));
              Log.d("PARAMS", params.toString());
            } catch (JSONException e) {
              e.printStackTrace();
            }
          }
          
          @Override
          public void onFailure(Throwable e, JSONObject error) {
            // Handle the failure and alert the user to retry
            Log.e("FAILURE", e.toString());
          }
        });

  }
}

Java Source Code List

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