参考自：http://www.helloandroid.com/tutorials/connecting-mysql-database
使用PHP作为中间介来实现android链接远程数据库。
PHP代码：
<?php
mysql_connect("host","username","password");
mysql_select_db("PeopleData");
$q=mysql_query("SELECT * FROM people WHERE birthyear>'".$_REQUEST['year']."'");
while($e=mysql_fetch_assoc($q))
$output[]=$e;
print(json_encode($output));
mysql_close();
?>
android代码：
package lzu.ConnectMysql;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
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.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class ConnectMysql extends Activity {
/** Called when the activity is first created. */
private TextView result;
private String content;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
result = (TextView)findViewById(R.id.content);
content = connecting();
result.setText(content);
//the year data to send
}
public String connecting(){
/*存放http请求得到的结果*/
String result = "";
String ss = null;
/*将要发送的数据封包 */
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("year","1980"));
InputStream is = null;
//http post
try{
/*创建一个HttpClient的一个对象*/
HttpClient httpclient = new DefaultHttpClient();
/*创建一个HttpPost的对象*/
HttpPost httppost = new HttpPost("http://202.201.0.245/test.php");
/*设置请求的数据*/
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
/*创建HttpResponse对象*/
HttpResponse response = httpclient.execute(httppost);
/*获取这次回应的消息实体*/
HttpEntity entity = response.getEntity();
/*创建一个指向对象实体的数据流*/
is = entity.getContent();
}catch(Exception e){
System.out.println("Connectiong Error");
}
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "/n");
}
is.close();
result=sb.toString();
System.out.println("get = " + result);
}catch(Exception e){
System.out.println("Error converting to String");
}
//parse json data
try{
/*从字符串result创建一个JSONArray对象*/
JSONArray jArray = new JSONArray(result);
for(int i=0;i<jArray.length();i++){
JSONObject json_data = jArray.getJSONObject(i);
System.out.println("Success");
System.out.println("result " + json_data.toString());
if( i == 0){
ss = json_data.toString();
}
else{
ss += json_data.toString();
}
}
}
catch(JSONException e){
System.out.println("Error parsing json");
}
return ss;
}
}