Big Data大数据，谈的不仅仅是数据量，其实包含了数据量(Volume)、时效性(Velocity)、多样性(Variety)、可疑性(Veracity)： Volume:数据量大量数据的产生、处理、保存,谈的就是Big Data就字面上的意思,就是谈海量数据 Velocity:时效性这个词我有看到几个解释,但我认为用IBM的解释来说是比较恰当的,就是处理的时效,既然前头提到Big Data其中一个用途是做市场预测,那处理的时效如果太长就失去了预测的意义了,所以处理的时效对Big Data来说也是非常关键的,500万笔数据的深入分析,可能只能花5分钟的时间 Variety:多变性指的是数据的形态,包含文字、影音、网页、串流等等结构性、非结构性的数据 Veracity:可疑性指的是当数据的来源变得更多元时,这些数据本身的可靠度、质量是否足够,若数据本身就是有问题的,那分析后的结果也不会是正确的。

package com.example.smartgrid;

import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class EditActivity extends Activity {
	EditText AppName = null;
	EditText wattage = null;
	EditText startTime = null;
	EditText endTime = null;
	EditText runTime = null;
	EditText constraint = null;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_edit);
		
		AppName = (EditText)findViewById(R.id.editText2);
		wattage = (EditText)findViewById(R.id.editText3);
		startTime = (EditText)findViewById(R.id.editText4);
		endTime = (EditText)findViewById(R.id.editText5);
		runTime = (EditText)findViewById(R.id.editText6);
		constraint = (EditText)findViewById(R.id.editText7);
		
		Button edit = (Button)findViewById(R.id.button1);
		edit.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				new EditTask().execute();
				
			}
		});
	}
	
	private class EditTask extends AsyncTask {
		String HadoopoutEdit;
		protected Double doInBackground(Void... voids) {
			postData();
			return null;
		}
		public void postData() {
			EditText ipAddress = (EditText) findViewById(R.id.editText1);
			
			HttpClient httpclient = new DefaultHttpClient();
			HttpPost httppost = new HttpPost("http://" + ipAddress.getText()
					+ "/editAppliance.php");
			try {
				List nameValuePairs = new ArrayList(
						1);
				nameValuePairs.add(new BasicNameValuePair("Name", AppName
						.getText().toString()));
				nameValuePairs.add(new BasicNameValuePair("StartTime",
						startTime.getText().toString()));
				nameValuePairs.add(new BasicNameValuePair("EndTime", endTime
						.getText().toString()));
				nameValuePairs.add(new BasicNameValuePair("Wattage", wattage
						.getText().toString()));
				nameValuePairs.add(new BasicNameValuePair("RunTime", runTime
						.getText().toString()));
				nameValuePairs.add(new BasicNameValuePair("Constraint",
						constraint.getText().toString()));
				httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
				HttpResponse response = httpclient.execute(httppost);
				HttpEntity entity = response.getEntity();
				HadoopoutEdit = EntityUtils.toString(entity);
			} catch (Exception e) {
				Log.e("log_tag", "Error in http connection " + e.toString());
				return;
			}
		}
		protected void onPostExecute(Double result) {
			AppName.setText("");
			wattage.setText("");
			startTime.setText("");
			endTime.setText("");
			runTime.setText("");
			constraint.setText("");
		}
	}
	
}

项目下载: BigData-master 地址:https://github.com/azeemshaikh38/BigData

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