Android客户端直接连接远程MySQL数据库的方法如下:
String result = "";
//首先使用NameValuePair封装将要查询的年数和关键字绑定
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("year","1980"));
//使用HttpPost封装整个SQL语句
//使用HttpClient发送HttpPost对象
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("
http://example.com/getAllPeopleBornAfter.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
InputStream is = entity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in http connection "+e.toString());
}
//将HttpEntity转化为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();
}catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
//将String通过JSONArray解析成最终结果
try{
JSONArray jArray = new JSONArray(result);
for(int i=0;i<jArray.length();i++){
JSONObject json_data = jArray.getJSONObject(i);
Log.i("log_tag","id: "+json_data.getInt("id")+
", name: "+json_data.getString("name")+
", sex: "+json_data.getInt("sex")+
", birthyear: "+json_data.getInt("birthyear")
);
}
}
}catch(JSONException e){
Log.e("log_tag", "Error parsing data "+e.toString());
}
虽然Android开发中可以直接连接数据库,但是实际中却不建议这么做,应该使用服务器端中转下完成。