java.lang.String类型的值无法在Android中转换为JSONArray（重新发布）(Value of type java.lang.String cannot be converted to JSONArray in Android(repost))

 我转发这个因为我找不到解决这个问题的方法...... 
 
 这是错误 
 
org.json.JSONException:Value <!DOCTYPE of type java.lang.String cannot be converted to JSONArray
 
 这是JSON输出： 
 
[{"name":"Muhaimin","address":"Sylhet","bgroup":"o+"}]
 
 这是类代码： 
 
entpackage com.example.blood;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;

import android.os.Bundle;
import android.os.StrictMode;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;

@SuppressLint("NewApi")
public class MainActivity extends Activity {

TextView resultView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
StrictMode.enableDefaults();
resultView=(TextView) findViewById(R.id.result);
getData();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

public void getData()
{
 String result="";
 InputStream isr=null;
 try{
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost=new HttpPost("http://10.0.2.2/blood/index.php");
    httppost.setHeader("Content-Type", "application/json");
     httppost.setHeader("Accept", "JSON");
    HttpResponse response=httpclient.execute(httppost);
    HttpEntity entity=response.getEntity();
    isr=entity.getContent();
  }catch(Exception e){
    String err=e.toString();
    resultView.setText("Could not connect to database"+err);
    Log.e("error", err);
  }

try{
    BufferedReader reader=new BufferedReader(new InputStreamReader(isr,"iso-8859-1"),8);
    StringBuilder sb=new StringBuilder();
    String line=null;
    while((line = reader.readLine()) != null){
        sb.append(line + "\n");
    }
    isr.close();

    result=sb.toString();
   }catch(Exception e){
    String err2=e.toString();
    resultView.setText("Error coverting result"+err2);
    Log.e("error", err2);
  }
  try{
    String s="";
    JSONArray jArray=new JSONArray(result);

    for(int i=0;i<jArray.length();i++){
        JSONObject json=jArray.getJSONObject(i);
        s= s + 
                "Name :"+json.getString("name")+"\n"+
                "Blood Group :"+json.getString("bgroup")+"\n" +
                "Address :"+json.getString("address")+"\n\n";
    }
    resultView.setText(s);
  }catch(Exception e){
    String err1=e.toString();
    resultView.setText("xxx"+err1);
    Log.e("error", err1);
 }
 }

}
 
 这是PHP代码： 
 
  <?php
$con=mysql_connect("localhost","root","","BloodDB");
mysql_select_db("BloodDB",$con);

$result=mysql_query("SELECT name,address,bgroup FROM tbl_blood_donor");

while($row=mysql_fetch_assoc($result))
{
    $output[]=$row;
}
print(json_encode($output));
mysql_close($con);
 ?>
 
 现在如何解决这个问题。我提前在localhost.thanks工作 

I am repost this coz I dont find the solution for this problem...
 
here is error
 
org.json.JSONException:Value <!DOCTYPE of type java.lang.String cannot be converted to JSONArray
 
here is JSON output:
 
[{"name":"Muhaimin","address":"Sylhet","bgroup":"o+"}]
 
here is class code:
 
entpackage com.example.blood;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;

import android.os.Bundle;
import android.os.StrictMode;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;

@SuppressLint("NewApi")
public class MainActivity extends Activity {

TextView resultView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
StrictMode.enableDefaults();
resultView=(TextView) findViewById(R.id.result);
getData();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

public void getData()
{
 String result="";
 InputStream isr=null;
 try{
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost=new HttpPost("http://10.0.2.2/blood/index.php");
    httppost.setHeader("Content-Type", "application/json");
     httppost.setHeader("Accept", "JSON");
    HttpResponse response=httpclient.execute(httppost);
    HttpEntity entity=response.getEntity();
    isr=entity.getContent();
  }catch(Exception e){
    String err=e.toString();
    resultView.setText("Could not connect to database"+err);
    Log.e("error", err);
  }

try{
    BufferedReader reader=new BufferedReader(new InputStreamReader(isr,"iso-8859-1"),8);
    StringBuilder sb=new StringBuilder();
    String line=null;
    while((line = reader.readLine()) != null){
        sb.append(line + "\n");
    }
    isr.close();

    result=sb.toString();
   }catch(Exception e){
    String err2=e.toString();
    resultView.setText("Error coverting result"+err2);
    Log.e("error", err2);
  }
  try{
    String s="";
    JSONArray jArray=new JSONArray(result);

    for(int i=0;i<jArray.length();i++){
        JSONObject json=jArray.getJSONObject(i);
        s= s + 
                "Name :"+json.getString("name")+"\n"+
                "Blood Group :"+json.getString("bgroup")+"\n" +
                "Address :"+json.getString("address")+"\n\n";
    }
    resultView.setText(s);
  }catch(Exception e){
    String err1=e.toString();
    resultView.setText("xxx"+err1);
    Log.e("error", err1);
 }
 }

}
 
here is php code:
 
  <?php
$con=mysql_connect("localhost","root","","BloodDB");
mysql_select_db("BloodDB",$con);

$result=mysql_query("SELECT name,address,bgroup FROM tbl_blood_donor");

while($row=mysql_fetch_assoc($result))
{
    $output[]=$row;
}
print(json_encode($output));
mysql_close($con);
 ?>
 
Now how to solve this problem.I am working in localhost.thanks in advance

原文：https://stackoverflow.com/questions/21674326