Question

数据库字段

phone_no || 计数
999999999 || 1
777777777 || 2

我创建了phone_no活动，如果我输入电话号码，它应该根据下面的phone_no显示计数

我的代码如下

{
HttpClient httpclient = new DefaultHttpClient();   
HttpPost httppost = new HttpPost("http://10.0.2.2/phoneno.php");

String pho = input.getText().toString();

List<NameValuePair> nameValuePairsphedit = new ArrayList<NameValuePair>(11);

nameValuePairsphedit.add(new BasicNameValuePair("phone_no",pho));

try {
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairsphedit));
Log.d("myapp", "works till here. 2");

 try {
         HttpResponse response = httpclient.execute(httppost);
         Log.d("myapp", "response " + response.getEntity());
         String result = EntityUtils.toString(response.getEntity());
         Log.d("","Response :"+result);
         JSONObject json=new JSONObject(result);

         count1 = json.getString("count");//count1 is local variable

     } 
catch (Exception e) 
{
     e.printStackTrace();
} 
                    }

我的phoneno.php文件如下

<?php

$conn= mysql_connect('localhost','root','');
if (!$conn)
  {
  die('Could not connect: ' . mysql_error());
  }

    mysql_select_db('test',$conn);


    $phone_no = mysql_escape_string($_REQUEST['phone_no']);

    $sql="SELECT * FROM meh WHERE phone_no='$phone_no'";
    $result = mysql_query($sql) or die(mysql_error());
    if (!$result)
    {
        die('There was a problem executing the query');
    }
    else
    {

    $rs=mysql_fetch_array($result);

    $arrInfo = array('phone_no' => $rs['phone_no'] , 'count' => $rs['count']);

    echo json_encode($arrInfo);

    }
?>

Answer 1

使用以下方法。您正在尝试直接读取response.getEntity（）。您需要先从该实体获取InputStream，然后从该InputStream中读取服务器流内容。

public static JSONObject read(String url)  {

    InputStream is = null;
    String result = "";
    JSONObject jsonObject = null;
    // http post
    try {
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(url);
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
        nameValuePairs.add(new BasicNameValuePair("phone_no",pho));
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        is = entity.getContent();

    } catch (Exception e) {
        e.printStackTrace();
    }

    // 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();
    } catch (Exception e) {
        e.printStackTrace();
    }

    //convert the read response to JSONObject
    try {
        System.out.println("Read data from server :" + result+":");
        jsonObject = new JSONObject(result);
    } catch (JSONException e) {
        e.printStackTrace();
    }

    return jsonObject;
}

如何在android中显示外部数据库内容并将其分配给局部变量

1 个答案: