Question

我是 JSON 和android联网的新手，我正在尝试编写代码以使用 PHP 从android应用程序更新 mysql 数据库。数小时前，数据库确实使用相同的代码进行了更新，但现在没有。我不明白为什么现在不更新。我正在使用 wamp 服务器。我知道我需要根据计算机的IP更改url。我相应地对其进行了更改，但数据库未更新。我检查了谷歌，有人建议清除网络浏览器的缓存。我也这样做了，但是什么也没发生。请帮我。我被卡住了！

这是我的代码：

public class MainActivity extends AppCompatActivity {
private ProgressDialog progress;

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

    new SendRequest().execute();
}

public class SendRequest extends AsyncTask<String, Void, String> {

    protected void onPreExecute(){}

    protected String doInBackground(String... arg0) {

        try {

            URL url = new URL("http://172.16.7.90/net.php");

            JSONObject postDataParams = new JSONObject();


            postDataParams.put("name", "saurav");
            postDataParams.put("email", "sau@gmail.com");

            Log.e("params", postDataParams.toString());

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setReadTimeout(15000 /* milliseconds */);
            conn.setConnectTimeout(15000 /* milliseconds */);
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true);

            OutputStream os = conn.getOutputStream();
            BufferedWriter writer = new BufferedWriter(
                    new OutputStreamWriter(os, "UTF-8"));
            writer.write(getPostDataString(postDataParams));

            writer.flush();
            writer.close();
            os.close();
    if (responseCode == HttpsURLConnection.HTTP_OK) {

BufferedReader in=new BufferedReader(new InputStreamReader(conn.getInputStream()));
StringBuffer sb = new StringBuffer("");
String line="";

while((line = in.readLine()) != null) {

    sb.append(line);
    break;
}

in.close();
return sb.toString();

   }
    else {
    return new String("false : "+responseCode);
    }





        } catch (Exception e) {
            return new String("Exception: " + e.getMessage());
        }
    return "success";}

    @Override
    protected void onPostExecute(String result) {
        Toast.makeText(getApplicationContext(), result,
                Toast.LENGTH_LONG).show();

    }
}

 public String getPostDataString(JSONObject params) throws Exception {

    StringBuilder result = new StringBuilder();
    boolean first = true;

    Iterator<String> itr = params.keys();

    while(itr.hasNext()){

        String key= itr.next();
        Object value = params.get(key);

        if (first){
            first = false};
        else{
            result.append("&")};

        result.append(URLEncoder.encode(key, "UTF-8"));
        result.append("=");
        result.append(URLEncoder.encode(value.toString(), "UTF-8"));

    }
    return result.toString();
}
}

这是我的net.php文件：

<?php
$host='localhost';
$username='root';
$password='';
$database='database2';
$name=$_POST['name'];
$email=$_POST['email'];
$dbc=mysqli_connect($host,$username,$password,$database)or die('error');

$sql="INSERT INTO table1(first_name,email)" ."VALUES('$name','$email')";

$result=mysqli_query($dbc,$sql);
mysqli_close($dbc);
?>

我的SQL数据库未从Android应用程序更新

0 个答案: