本文实例讲述了Android通过json向MySQL中写入数据的方法。分享给大家供大家参考,具体如下:
先说一下如何通过json将Android程序中的数据上传到MySQL中:
首先定义一个类JSONParser.Java类,将json上传数据的方法封装好,可以直接在主程序中调用该类,代码如下
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = \"\";
// constructor
public JSONParser() {
}
// function get json from url
// by making HTTP POST
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, \"UTF-8\"));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + \"\\n\");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e(\"Buffer Error\", \"Error converting result \" + e.toString());
Log.d(\"json\", json.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e(\"JSON Parser\", \"Error parsing data \" + e.toString());
}
// return JSON String
return jObj;
}
}
主程序中这样调用:
params = new ArrayList<NameValuePair>();
//这里可以替换成你自己程序中的一些键值对
params.add(new BasicNameValuePair(\"time\", \"\"+time));
params.add(new BasicNameValuePair(\"lat\", \"\"+lat));
params.add(new BasicNameValuePair(\"lon\", \"\"+lon));
params.add(new BasicNameValuePair(\"encyptiontype\",encyptiontype));
params.add(new BasicNameValuePair(\"rssi\",rssi));
params.add(new BasicNameValuePair(\"name\",name));
JSONParser jsonParser = new JSONParser();
//数据的php文件的路径
String url_up = \"******/文件名字.php\";
try{
JSONObject json = jsonParser.makeHttpRequest(url_up,\"POST\", params);
Log.v(\"uploadsucceed\", \"uploadsucceed\");
}catch(Exception e){
e.printStackTrace();
}
最后就是定义一个接收数据的php文件:
<?php
// array for JSON response
//此处需要将数据库名和表明还有密码做相应修改,改成你自己的
$con = mysql_connect(\"localhost\",\"root\",null);
if (!$con) {
die(\'Could not connect:\'.mysql_error() );
}
mysql_select_db(\"a0722152915\", $con);
$response = array();
include(\"conn.php\");
// check for required fields
if (isset($_POST[\'time\']) && isset($_POST[\'lat\']) && isset($_POST[\'lon\'])&& isset($_POST[\'encyptiontype\'])&& isset($_POST[\'rssi\'])&& isset($_POST[\'name\'])) {
$time = $_POST[\'time\'];
$lat = $_POST[\'lat\'];
$lon = $_POST[\'lon\'];
$encyptiontype = $_POST[\'encyptiontype\'];
$rssi = $_POST[\'rssi\'];
$name = $_POST[\'name\'];
$result = mysql_query(\"INSERT INTO wifi_state(time, lat, lon,encyptiontype,rssi,name) VALUES(\'$time\', \'$lat\', \'$lon\',\'$encyptiontype\',\'$rssi\',\'$name\')\");
echo $result;
// check if row inserted or not
if ($result) {
// successfully inserted into database
$response[\"success\"] = 1;
$response[\"message\"] = \"Product successfully created.\";
// echoing JSON response
echo json_encode($response);
} else {
// failed to insert row
$response[\"success\"] = 0;
$response[\"message\"] = \"Oops! An error occurred.\";
// echoing JSON response
echo json_encode($response);
}
} else {
// required field is missing
$response[\"success\"] = 0;
$response[\"message\"] = \"Required field(s) is missing\";
// echoing JSON response
echo json_encode($response);
}
?>
注意:如果你的设备中android操作系统是4.0以上的,那么要在主程序中加上下面一段代码,才能上传成功
StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder() .detectDiskReads() .detectDiskWrites() .detectNetwork() // or .detectAll() for all detectable problems .penaltyLog() .build()); StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder() .detectLeakedSqlLiteObjects() .detectLeakedClosableObjects() .penaltyLog() .penaltyDeath() .build());
如果是4.0以下的操作系统当然不用加了
下面是上传成功后的效果图:
读数据的方法讲放在下一篇《Android通过json向MySQL中读写数据的方法详解【读取篇】》中介绍
更多关于Android相关内容感兴趣的读者可查看本站专题:《Android操作json格式数据技巧总结》、《Android数据库操作技巧总结》、《Android编程之activity操作技巧总结》、《Android文件操作技巧汇总》、《Android编程开发之SD卡操作方法汇总》、《Android开发入门与进阶教程》、《Android资源操作技巧汇总》、《Android视图View技巧总结》及《Android控件用法总结》
希望本文所述对大家Android程序设计有所帮助。
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