我是 Android 开发的新手。
我正在尝试使用 JSON 在列表视图中基于用户 ID 获取 db 值。
我在stackoverflow上搜索了这个问题，但我找不到解决方案。
我不知道我得到了什么，JSONArray 或 JSONObject。
标题显示在 logcat 中。我已经尝试了下面提到的代码。
public class Search_Id extends Activity implements OnClickListener
{
private static String url_search_by_id="php file in the remote server";
private static final String REGISTER="regs";
private static final String ID="id";
private static final String FNAME="fname";
private static final String LNAME="lname";
private static final String PROFILEFOR="profilefor";
private static final String AGE="age";
private ProgressDialog PDialog;
EditText Et_sear_id;
Button Btn_Search;
TextView search_id_detail_id,search_id_detail_fname,search_id_detail_lname,search_id_detail_profilefor,search_id_detail_age;
public void onCreate(Bundle b)
{
super.onCreate(b);
setContentView(R.layout.search_id);
Et_sear_id=(EditText)findViewById(R.id.sear_et_id);
Btn_Search=(Button)findViewById(R.id.sear_btn_search);
Btn_Search.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(v.equals(Btn_Search))
{
//new SearchDetail().execute();
final String st_id=Et_sear_id.getText().toString();
if(st_id.length()>0)
{
ArrayList<NameValuePair> postparameter=new ArrayList<NameValuePair>();
postparameter.add(new BasicNameValuePair("id",st_id));
String response=null;
try
{
response = CustomHttpClient.executeHttpPost("php file in the remote server", postparameter);
String res=response.toString();
// res = res.trim();
res= res.replaceAll("\\s+","");
//error.setText(res);
//Toast.makeText(getApplicationContext(), res, Toast.LENGTH_SHORT).show();
if(res.equals("yes"))
{
new SearchDetail().execute();
Toast.makeText(getApplicationContext(), "Correct",Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getApplicationContext(), "Incorrect",Toast.LENGTH_SHORT).show();
Et_sear_id.setText("");
}
}
catch (Exception e) {
// TODO: handle exception
Toast.makeText(getApplicationContext(), e.toString(),Toast.LENGTH_LONG).show();
}
}
else
{
Et_sear_id.setError("Provide ID to Search");
}
}
}
class SearchDetail extends AsyncTask<String,String,String>
{
//final String St_sear_id1=Et_sear_id.getText().toString();
@Override
protected void onPreExecute()
{
super.onPreExecute();
PDialog=new ProgressDialog(Search_Id.this);
PDialog.setMessage("Loading...");
PDialog.setIndeterminate(false);
PDialog.setCancelable(true);
PDialog.show();
}
@Override
protected String doInBackground(String... arg0) {
final String st_id=Et_sear_id.getText().toString();
// TODO Auto-generated method stub
List<NameValuePair> params=new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("id",st_id));
JSONParser jsonParser=new JSONParser();
JSONObject json=jsonParser.makeHttpRequest(url_search_by_id_guna,"POST",params);
//Log.d("Create Response", json.toString());
try
{
//Toast.makeText(getApplicationContext(), "Comes into Try Block", Toast.LENGTH_LONG).show();
JSONArray jsonarray = json.getJSONArray(REGISTER);
for(int i=0;i<jsonarray.length();i++)
{
JSONObject jo=jsonarray.getJSONObject(i);
int id = jo.getInt(ID);
String fname = jo.getString(FNAME);
String lname= jo.getString(LNAME);
String profile_for=jo.getString(PROFILEFOR);
String age=jo.getString(AGE);
Intent in=new Intent(getApplicationContext(),Search_Id_Detail.class);
//i.putExtra("REGISTER", regs);
in.putExtra("ID",id);
in.putExtra("FNAME",fname);
in.putExtra("LNAME",lname);
in.putExtra("PROFILEFOR",profile_for);
in.putExtra("AGE",age);
startActivity(in);
}
}
catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String arg)
{
PDialog.dismiss();
}
}
}
PHP文件如下：
<?php
/* Following code will list all products */
//array for JSON response
$response=array();
$id=$_POST['id'];
require_once 'vivagha_db_connect.php';
//Connect to database
$db=new DB_CONNECT();
//get all products from products table
$result=mysql_query("select *from regs where db_reg_id=$id") or die(mysql_error());
//check for empty result
if(mysql_num_rows($result)>0)
{
//looping through all results
//products node
//$response["regs"]=array();
while($row=mysql_fetch_array($result))
{
//temp user array
//$register=array();
$response["id"]=$row["db_reg_id"];
$response["fname"]=$row["db_reg_fname"];
$response["lname"]=$row["db_reg_lname"];
$response["profilefor"]=$row["db_reg_profilefor"];
$response["age"]=$row["db_reg_age"];
//push single product into final response array
//array_push($response["regs"],$register);
$response["success"]=1;
$response["message"]="Found";
}
//success
//response["success"]=1;
//echo JSON response
echo json_encode($response);
}
else
{
//no product found
$response["success"]=0;
$response["message"]="No Products Found";
//echo no users JSON
//echo json_encode($response);
}
//}
?>
我输入了用户的 id，然后如果 id 可用，则必须显示用户的详细信息。但它给了我标题所暗示的日志。
如果我能找到解决方案，这对我学习 android 会有帮助。