com.ibm.sample.travelbuddy.MainActivity.java Source code

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Here is the source code for com.ibm.sample.travelbuddy.MainActivity.java

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/*
 * Copyright 2014 IBM Corp. All Rights Reserved
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0 
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.ibm.sample.travelbuddy;

import java.util.ArrayList;
import java.util.List;

import org.apache.http.Header;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

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

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {

    private EditText searchTxt;
    private Button searchBtn;
    private Button clearBtn;

    private ListView listView;
    private ArrayAdapter<String> adapter;
    List<String> itemList = new ArrayList<String>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        searchTxt = (EditText) findViewById(R.id.searchTxt);
        searchBtn = (Button) findViewById(R.id.searchBtn);
        clearBtn = (Button) findViewById(R.id.clearBtn);
        listView = (ListView) findViewById(R.id.searchListView);
        adapter = new ArrayAdapter<String>(this, R.layout.item, R.id.item_name, itemList);
        listView.setAdapter(adapter);

        searchBtn.setOnClickListener(this);
        clearBtn.setOnClickListener(this);

    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
        case R.id.searchBtn:
            doSearch();
            break;

        case R.id.clearBtn:
            doClear();
            break;

        default:
            break;
        }
    }

    /**
     * This method clears the text field and the list view
     */
    private void doClear() {
        searchTxt.setText("");
        itemList.clear();
        adapter.notifyDataSetChanged();
    }

    /**
     * This method searches the Watson QA service by using the question text
     */
    private void doSearch() {
        String sTxt = searchTxt.getText().toString();
        if (sTxt.trim().equals("")) {
            Toast.makeText(getApplicationContext(), "Please enter your question", Toast.LENGTH_SHORT).show();
            return;
        }

        RequestParams param = new RequestParams();
        param.add("questionText", sTxt);
        HttpUtil.get(param, new JsonHttpResponseHandler() {
            @Override
            public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
                Log.i("doSearch", response.toString());

                try {
                    String respCode = response.getString("respCode");
                    if (respCode.equals(HttpUtil.RESP_SUCCESS)) {
                        JSONArray bodyArray = response.getJSONArray("body");
                        itemList.clear();
                        for (int i = 0; i < bodyArray.length(); i++) {
                            JSONObject obj = bodyArray.getJSONObject(i);
                            itemList.add("(" + obj.getString("confidence") + ")  " + obj.getString("text"));
                        }
                        adapter.notifyDataSetChanged();
                    } else {
                        Toast.makeText(getApplicationContext(), response.getString("respText"), Toast.LENGTH_LONG)
                                .show();
                    }

                } catch (JSONException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        });
    }
}