java.lang.String类型的值<br在Android编程中不能转换为JSONObject

【问题标题】：value <br of type java.lang.String cannot be converted to JSONObject In Android Programmingjava.lang.String类型的值<br在Android编程中不能转换为JSONObject
【发布时间】：2016-01-20 11:58:53
【问题描述】：

当我创建新的 Android 应用程序以从我的服务器（如 xampp）获取数据时，但它不是检索，并且我正在使用 catch 语句处理 itz 异常，然后它说 JSONObject 无法转换它，如何解决？

解决方案，请帮助我？ 提前致谢

我的完整 Java 代码

   package com.example.fetch;

import java.util.ArrayList;
import java.util.List;

import org.apache.http.NameValuePair;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONObject;


import android.app.Activity;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;


public class Disp extends Activity {
    TextView user,email,phone;
    String abdu,hos,em,ph;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.disp);
        user=(TextView)findViewById(R.id.user);
        email=(TextView)findViewById(R.id.email);
        phone=(TextView)findViewById(R.id.phone);
        SharedPreferences sandra=getApplicationContext().getSharedPreferences("veena", MODE_WORLD_READABLE);
        abdu=sandra.getString("shyma", "");
        user.setText(abdu);
        aji aj=new aji();
        aj.execute();
    }
    class aji extends AsyncTask<Void, Void, Void>
    {

        @Override
        protected Void doInBackground(Void... arg0) {
            // TODO Auto-generated method stub
            try
            {
                DefaultHttpClient hc=new DefaultHttpClient();
                ResponseHandler<String> res=new BasicResponseHandler();
                HttpPost postMethod=new HttpPost("http://10.0.2.2/std/ret.php");
                List<NameValuePair>nameValuePairs=new ArrayList<NameValuePair>(1);
                nameValuePairs.add(new BasicNameValuePair("username",abdu));
                postMethod.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                 hos = hc.execute(postMethod,res);
                 System.out.println(hos);

            }
            catch(Exception e)
            {
                System.out.println("Error:"+e);
                Log.e("Fail 1", e.toString());
                Toast.makeText(getApplicationContext(), "Invalid Login",
                        Toast.LENGTH_LONG).show();

            }
            return null;
        }
        @Override
        protected void onPostExecute(Void result) {
            // TODO Auto-generated method stub
            super.onPostExecute(result);
            parsingmethod();
        }
    }



    public void parsingmethod()
    {
        try
        {
            JSONObject jobject=new JSONObject(hos);
            JSONObject jobject1=jobject.getJSONObject("Event");
            JSONArray ja=jobject1.getJSONArray("Details");
            int length=ja.length();
            for(int i=0;i<length;i++)
            {
                JSONObject data1=ja.getJSONObject(i);

                em=data1.getString("email");
                ph=data1.getString("pass");

                System.out.println(em+ph);
                email.setText(em);
                phone.setText(ph);

            }
        }
        catch(Exception e)
        {
            /*System.out.println("error:"+e);
            Log.e("Fail 2", e.toString());
            Toast.makeText(getApplicationContext(), "Invalid IP Address",
                    Toast.LENGTH_LONG).show();*/
            e.printStackTrace();
            displayExceptionMessage(e.getMessage());
        }
        }



    private void displayExceptionMessage(String message) {
        // TODO Auto-generated method stub
        Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();
    }
    }

Catch Exception 显示该值

我的原木猫

01-20 16:22:31.432: I/System.out(10797): Error:org.apache.http.conn.HttpHostConnectException: Connection to http://localhost refused
01-20 16:22:31.452: I/System.out(10797): error:java.lang.NullPointerException
01-20 16:24:01.342: I/System.out(10996): error:org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 16:44:57.302: I/System.out(11503): error:org.json.JSONException: No value for Event
01-20 16:50:19.062: I/System.out(11741): error:org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 16:50:59.572: I/System.out(11960): error:org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 16:50:59.572: E/Fail 2(11960): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 16:51:26.462: I/PGA(12155): New SOCKET connection: m.example.fetch (pid 12155, tid 12155)
01-20 16:51:29.142: I/System.out(12155): error:org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 16:51:29.142: E/Fail 2(12155): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 16:51:49.742: I/System.out(12347): error:org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 16:51:49.742: E/Fail 2(12347): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 16:52:11.062: I/System.out(12540): error:org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 16:52:11.062: E/Fail 2(12540): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 17:05:45.082: W/System.err(13814): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 17:05:45.082: W/System.err(13814):    at org.json.JSON.typeMismatch(JSON.java:111)
01-20 17:05:45.082: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:158)
01-20 17:05:45.082: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:171)
01-20 17:05:45.082: W/System.err(13814):    at com.example.fetch.Disp.parsingmethod(Disp.java:86)
01-20 17:05:45.082: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:76)
01-20 17:05:45.082: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:1)
01-20 17:05:45.082: W/System.err(13814):    at android.os.AsyncTask.finish(AsyncTask.java:602)
01-20 17:05:45.082: W/System.err(13814):    at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-20 17:05:45.082: W/System.err(13814):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-20 17:05:45.082: W/System.err(13814):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 17:05:45.082: W/System.err(13814):    at android.os.Looper.loop(Looper.java:137)
01-20 17:05:45.082: W/System.err(13814):    at android.app.ActivityThread.main(ActivityThread.java:4424)
01-20 17:05:45.082: W/System.err(13814):    at java.lang.reflect.Method.invokeNative(Native Method)
01-20 17:05:45.082: W/System.err(13814):    at java.lang.reflect.Method.invoke(Method.java:511)
01-20 17:05:45.082: W/System.err(13814):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
01-20 17:05:45.082: W/System.err(13814):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:592)
01-20 17:05:45.082: W/System.err(13814):    at dalvik.system.NativeStart.main(Native Method)
01-20 17:05:51.882: W/System.err(13814): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 17:05:51.882: W/System.err(13814):    at org.json.JSON.typeMismatch(JSON.java:111)
01-20 17:05:51.882: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:158)
01-20 17:05:51.882: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:171)
01-20 17:05:51.892: W/System.err(13814):    at com.example.fetch.Disp.parsingmethod(Disp.java:86)
01-20 17:05:51.892: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:76)
01-20 17:05:51.892: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:1)
01-20 17:05:51.892: W/System.err(13814):    at android.os.AsyncTask.finish(AsyncTask.java:602)
01-20 17:05:51.892: W/System.err(13814):    at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-20 17:05:51.892: W/System.err(13814):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-20 17:05:51.892: W/System.err(13814):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 17:05:51.892: W/System.err(13814):    at android.os.Looper.loop(Looper.java:137)
01-20 17:05:51.892: W/System.err(13814):    at android.app.ActivityThread.main(ActivityThread.java:4424)
01-20 17:05:51.892: W/System.err(13814):    at java.lang.reflect.Method.invokeNative(Native Method)
01-20 17:05:51.892: W/System.err(13814):    at java.lang.reflect.Method.invoke(Method.java:511)
01-20 17:05:51.892: W/System.err(13814):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
01-20 17:05:51.892: W/System.err(13814):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:592)
01-20 17:05:51.892: W/System.err(13814):    at dalvik.system.NativeStart.main(Native Method)
01-20 17:06:26.712: W/System.err(13814): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 17:06:26.712: W/System.err(13814):    at org.json.JSON.typeMismatch(JSON.java:111)
01-20 17:06:26.712: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:158)
01-20 17:06:26.712: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:171)
01-20 17:06:26.712: W/System.err(13814):    at com.example.fetch.Disp.parsingmethod(Disp.java:86)
01-20 17:06:26.712: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:76)
01-20 17:06:26.712: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:1)
01-20 17:06:26.712: W/System.err(13814):    at android.os.AsyncTask.finish(AsyncTask.java:602)
01-20 17:06:26.712: W/System.err(13814):    at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-20 17:06:26.712: W/System.err(13814):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-20 17:06:26.712: W/System.err(13814):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 17:06:26.712: W/System.err(13814):    at android.os.Looper.loop(Looper.java:137)
01-20 17:06:26.712: W/System.err(13814):    at android.app.ActivityThread.main(ActivityThread.java:4424)
01-20 17:06:26.712: W/System.err(13814):    at java.lang.reflect.Method.invokeNative(Native Method)
01-20 17:06:26.712: W/System.err(13814):    at java.lang.reflect.Method.invoke(Method.java:511)
01-20 17:06:26.712: W/System.err(13814):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
01-20 17:06:26.712: W/System.err(13814):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:592)
01-20 17:06:26.712: W/System.err(13814):    at dalvik.system.NativeStart.main(Native Method)
01-20 17:07:20.232: W/System.err(13814): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 17:07:20.242: W/System.err(13814):    at org.json.JSON.typeMismatch(JSON.java:111)
01-20 17:07:20.242: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:158)
01-20 17:07:20.242: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:171)
01-20 17:07:20.242: W/System.err(13814):    at com.example.fetch.Disp.parsingmethod(Disp.java:86)
01-20 17:07:20.242: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:76)
01-20 17:07:20.242: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:1)
01-20 17:07:20.242: W/System.err(13814):    at android.os.AsyncTask.finish(AsyncTask.java:602)
01-20 17:07:20.242: W/System.err(13814):    at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-20 17:07:20.242: W/System.err(13814):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-20 17:07:20.242: W/System.err(13814):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 17:07:20.242: W/System.err(13814):    at android.os.Looper.loop(Looper.java:137)
01-20 17:07:20.242: W/System.err(13814):    at android.app.ActivityThread.main(ActivityThread.java:4424)
01-20 17:07:20.242: W/System.err(13814):    at java.lang.reflect.Method.invokeNative(Native Method)
01-20 17:07:20.242: W/System.err(13814):    at java.lang.reflect.Method.invoke(Method.java:511)
01-20 17:07:20.242: W/System.err(13814):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
01-20 17:07:20.242: W/System.err(13814):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:592)
01-20 17:07:20.242: W/System.err(13814):    at dalvik.system.NativeStart.main(Native Method)
01-20 17:07:40.612: W/System.err(13814): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 17:07:40.612: W/System.err(13814):    at org.json.JSON.typeMismatch(JSON.java:111)
01-20 17:07:40.612: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:158)
01-20 17:07:40.612: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:171)
01-20 17:07:40.612: W/System.err(13814):    at com.example.fetch.Disp.parsingmethod(Disp.java:86)
01-20 17:07:40.612: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:76)
01-20 17:07:40.612: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:1)
01-20 17:07:40.612: W/System.err(13814):    at android.os.AsyncTask.finish(AsyncTask.java:602)
01-20 17:07:40.612: W/System.err(13814):    at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-20 17:07:40.612: W/System.err(13814):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-20 17:07:40.612: W/System.err(13814):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 17:07:40.612: W/System.err(13814):    at android.os.Looper.loop(Looper.java:137)
01-20 17:07:40.612: W/System.err(13814):    at android.app.ActivityThread.main(ActivityThread.java:4424)
01-20 17:07:40.612: W/System.err(13814):    at java.lang.reflect.Method.invokeNative(Native Method)
01-20 17:07:40.612: W/System.err(13814):    at java.lang.reflect.Method.invoke(Method.java:511)
01-20 17:07:40.612: W/System.err(13814):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
01-20 17:07:40.612: W/System.err(13814):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:592)
01-20 17:07:40.612: W/System.err(13814):    at dalvik.system.NativeStart.main(Native Method)
01-20 17:11:44.152: W/System.err(13814): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 17:11:44.152: W/System.err(13814):    at org.json.JSON.typeMismatch(JSON.java:111)
01-20 17:11:44.162: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:158)
01-20 17:11:44.162: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:171)
01-20 17:11:44.162: W/System.err(13814):    at com.example.fetch.Disp.parsingmethod(Disp.java:86)
01-20 17:11:44.162: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:76)
01-20 17:11:44.162: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:1)
01-20 17:11:44.162: W/System.err(13814):    at android.os.AsyncTask.finish(AsyncTask.java:602)
01-20 17:11:44.162: W/System.err(13814):    at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-20 17:11:44.162: W/System.err(13814):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-20 17:11:44.162: W/System.err(13814):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 17:11:44.162: W/System.err(13814):    at android.os.Looper.loop(Looper.java:137)
01-20 17:11:44.162: W/System.err(13814):    at android.app.ActivityThread.main(ActivityThread.java:4424)
01-20 17:11:44.162: W/System.err(13814):    at java.lang.reflect.Method.invokeNative(Native Method)
01-20 17:11:44.162: W/System.err(13814):    at java.lang.reflect.Method.invoke(Method.java:511)
01-20 17:11:44.162: W/System.err(13814):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
01-20 17:11:44.162: W/System.err(13814):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:592)
01-20 17:11:44.162: W/System.err(13814):    at dalvik.system.NativeStart.main(Native Method)
01-20 17:12:13.872: E/dalvikvm(13814): No JIT support for bytecode f0 at offsetPC 0
01-20 17:12:13.872: E/dalvikvm(13814): JIT implementation not found
01-20 17:12:13.872: I/dalvikvm(13814): codeGenBasicBlockJit returns negative number
01-20 17:12:13.892: W/System.err(13814): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 17:12:13.892: W/System.err(13814):    at org.json.JSON.typeMismatch(JSON.java:111)
01-20 17:12:13.892: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:158)
01-20 17:12:13.892: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:171)
01-20 17:12:13.892: W/System.err(13814):    at com.example.fetch.Disp.parsingmethod(Disp.java:86)
01-20 17:12:13.892: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:76)
01-20 17:12:13.892: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:1)
01-20 17:12:13.892: W/System.err(13814):    at android.os.AsyncTask.finish(AsyncTask.java:602)
01-20 17:12:13.892: W/System.err(13814):    at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-20 17:12:13.892: W/System.err(13814):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-20 17:12:13.892: W/System.err(13814):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 17:12:13.892: W/System.err(13814):    at android.os.Looper.loop(Looper.java:137)
01-20 17:12:13.892: W/System.err(13814):    at android.app.ActivityThread.main(ActivityThread.java:4424)
01-20 17:12:13.892: W/System.err(13814):    at java.lang.reflect.Method.invokeNative(Native Method)
01-20 17:12:13.892: W/System.err(13814):    at java.lang.reflect.Method.invoke(Method.java:511)
01-20 17:12:13.892: W/System.err(13814):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
01-20 17:12:13.892: W/System.err(13814):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:592)
01-20 17:12:13.892: W/System.err(13814):    at dalvik.system.NativeStart.main(Native Method)
01-20 17:13:12.522: W/System.err(13814): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 17:13:12.522: W/System.err(13814):    at org.json.JSON.typeMismatch(JSON.java:111)
01-20 17:13:12.522: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:158)
01-20 17:13:12.522: W/System.err(13814):    at org.json.JSONObject.<init>(JSONObject.java:171)
01-20 17:13:12.522: W/System.err(13814):    at com.example.fetch.Disp.parsingmethod(Disp.java:86)
01-20 17:13:12.522: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:76)
01-20 17:13:12.522: W/System.err(13814):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:1)
01-20 17:13:12.522: W/System.err(13814):    at android.os.AsyncTask.finish(AsyncTask.java:602)
01-20 17:13:12.522: W/System.err(13814):    at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-20 17:13:12.522: W/System.err(13814):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-20 17:13:12.522: W/System.err(13814):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 17:13:12.522: W/System.err(13814):    at android.os.Looper.loop(Looper.java:137)
01-20 17:13:12.522: W/System.err(13814):    at android.app.ActivityThread.main(ActivityThread.java:4424)
01-20 17:13:12.522: W/System.err(13814):    at java.lang.reflect.Method.invokeNative(Native Method)
01-20 17:13:12.522: W/System.err(13814):    at java.lang.reflect.Method.invoke(Method.java:511)
01-20 17:13:12.522: W/System.err(13814):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
01-20 17:13:12.522: W/System.err(13814):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:592)
01-20 17:13:12.522: W/System.err(13814):    at dalvik.system.NativeStart.main(Native Method)
01-20 17:19:47.832: I/PGA(14194): New SOCKET connection: m.example.fetch (pid 14194, tid 14194)
01-20 17:19:50.772: W/System.err(14194): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONArray
01-20 17:19:50.772: W/System.err(14194):    at org.json.JSON.typeMismatch(JSON.java:111)
01-20 17:19:50.772: W/System.err(14194):    at org.json.JSONArray.<init>(JSONArray.java:91)
01-20 17:19:50.772: W/System.err(14194):    at org.json.JSONArray.<init>(JSONArray.java:103)
01-20 17:19:50.772: W/System.err(14194):    at com.example.fetch.Disp.parsingmethod(Disp.java:86)
01-20 17:19:50.772: W/System.err(14194):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:76)
01-20 17:19:50.772: W/System.err(14194):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:1)
01-20 17:19:50.772: W/System.err(14194):    at android.os.AsyncTask.finish(AsyncTask.java:602)
01-20 17:19:50.772: W/System.err(14194):    at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-20 17:19:50.772: W/System.err(14194):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-20 17:19:50.772: W/System.err(14194):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 17:19:50.772: W/System.err(14194):    at android.os.Looper.loop(Looper.java:137)
01-20 17:19:50.772: W/System.err(14194):    at android.app.ActivityThread.main(ActivityThread.java:4424)
01-20 17:19:50.772: W/System.err(14194):    at java.lang.reflect.Method.invokeNative(Native Method)
01-20 17:19:50.772: W/System.err(14194):    at java.lang.reflect.Method.invoke(Method.java:511)
01-20 17:19:50.772: W/System.err(14194):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
01-20 17:19:50.772: W/System.err(14194):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:592)
01-20 17:19:50.772: W/System.err(14194):    at dalvik.system.NativeStart.main(Native Method)
01-20 17:22:24.402: W/System.err(14194): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONArray
01-20 17:22:24.402: W/System.err(14194):    at org.json.JSON.typeMismatch(JSON.java:111)
01-20 17:22:24.402: W/System.err(14194):    at org.json.JSONArray.<init>(JSONArray.java:91)
01-20 17:22:24.402: W/System.err(14194):    at org.json.JSONArray.<init>(JSONArray.java:103)
01-20 17:22:24.402: W/System.err(14194):    at com.example.fetch.Disp.parsingmethod(Disp.java:86)
01-20 17:22:24.402: W/System.err(14194):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:76)
01-20 17:22:24.402: W/System.err(14194):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:1)
01-20 17:22:24.402: W/System.err(14194):    at android.os.AsyncTask.finish(AsyncTask.java:602)
01-20 17:22:24.402: W/System.err(14194):    at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-20 17:22:24.402: W/System.err(14194):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-20 17:22:24.402: W/System.err(14194):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 17:22:24.402: W/System.err(14194):    at android.os.Looper.loop(Looper.java:137)
01-20 17:22:24.402: W/System.err(14194):    at android.app.ActivityThread.main(ActivityThread.java:4424)
01-20 17:22:24.402: W/System.err(14194):    at java.lang.reflect.Method.invokeNative(Native Method)
01-20 17:22:24.402: W/System.err(14194):    at java.lang.reflect.Method.invoke(Method.java:511)
01-20 17:22:24.402: W/System.err(14194):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
01-20 17:22:24.402: W/System.err(14194):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:592)
01-20 17:22:24.402: W/System.err(14194):    at dalvik.system.NativeStart.main(Native Method)
01-20 17:32:17.792: W/System.err(14194): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONArray
01-20 17:32:17.792: W/System.err(14194):    at org.json.JSON.typeMismatch(JSON.java:111)
01-20 17:32:17.792: W/System.err(14194):    at org.json.JSONArray.<init>(JSONArray.java:91)
01-20 17:32:17.792: W/System.err(14194):    at org.json.JSONArray.<init>(JSONArray.java:103)
01-20 17:32:17.792: W/System.err(14194):    at com.example.fetch.Disp.parsingmethod(Disp.java:86)
01-20 17:32:17.792: W/System.err(14194):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:76)
01-20 17:32:17.792: W/System.err(14194):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:1)
01-20 17:32:17.792: W/System.err(14194):    at android.os.AsyncTask.finish(AsyncTask.java:602)
01-20 17:32:17.792: W/System.err(14194):    at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-20 17:32:17.802: W/System.err(14194):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-20 17:32:17.802: W/System.err(14194):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 17:32:17.802: W/System.err(14194):    at android.os.Looper.loop(Looper.java:137)
01-20 17:32:17.802: W/System.err(14194):    at android.app.ActivityThread.main(ActivityThread.java:4424)
01-20 17:32:17.802: W/System.err(14194):    at java.lang.reflect.Method.invokeNative(Native Method)
01-20 17:32:17.802: W/System.err(14194):    at java.lang.reflect.Method.invoke(Method.java:511)
01-20 17:32:17.802: W/System.err(14194):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
01-20 17:32:17.802: W/System.err(14194):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:592)
01-20 17:32:17.802: W/System.err(14194):    at dalvik.system.NativeStart.main(Native Method)

我的 PHP 页面

<?php
include("config.php");
$user=$_REQUEST['user'];
$sql1=mysql_query("select * from reg_table where user='$user'")or die (mysql_error());
$c = mysql_num_rows($sql1);
while($sql2 = mysql_fetch_array($sql1))
{
$arrDet['Event']['Details'][]=$sql2;
}
if($c>0)
{
$arrDet['Details']['status']="success";
}
else
{
$arrDet['Details']['status']="Nodata";
}
echo json_encode($arrDet);
?>

主 Logcat 错误

01-20 17:47:26.442: W/System.err(14954): org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
01-20 17:47:26.442: W/System.err(14954):    at org.json.JSON.typeMismatch(JSON.java:111)
01-20 17:47:26.442: W/System.err(14954):    at org.json.JSONObject.<init>(JSONObject.java:158)
01-20 17:47:26.442: W/System.err(14954):    at org.json.JSONObject.<init>(JSONObject.java:171)
01-20 17:47:26.442: W/System.err(14954):    at com.example.fetch.Disp.parsingmethod(Disp.java:86)
01-20 17:47:26.442: W/System.err(14954):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:76)
01-20 17:47:26.442: W/System.err(14954):    at com.example.fetch.Disp$aji.onPostExecute(Disp.java:1)
01-20 17:47:26.442: W/System.err(14954):    at android.os.AsyncTask.finish(AsyncTask.java:602)
01-20 17:47:26.442: W/System.err(14954):    at android.os.AsyncTask.access$600(AsyncTask.java:156)
01-20 17:47:26.442: W/System.err(14954):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
01-20 17:47:26.442: W/System.err(14954):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 17:47:26.442: W/System.err(14954):    at android.os.Looper.loop(Looper.java:137)
01-20 17:47:26.442: W/System.err(14954):    at android.app.ActivityThread.main(ActivityThread.java:4424)
01-20 17:47:26.442: W/System.err(14954):    at java.lang.reflect.Method.invokeNative(Native Method)
01-20 17:47:26.442: W/System.err(14954):    at java.lang.reflect.Method.invoke(Method.java:511)
01-20 17:47:26.442: W/System.err(14954):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
01-20 17:47:26.442: W/System.err(14954):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:592)
01-20 17:47:26.442: W/System.err(14954):    at dalvik.system.NativeStart.main(Native Method)

【问题讨论】：

  • 请发布 logcat 错误输出和您的 JSON。
  • 我认为您正在使用 PHP 作为服务器端，而 &lt;br ... 是您调用的 php 页面中的错误，因此请检查您的服务器端代码
  • 错误信息“
  • @SignoffTeamz 请编辑您的问题以添加代码和 logcat。在 cmets 中是相当不可读的。
  • 我可以看到，在您的 java 代码中，您正在发送 http-param username 但在您的 PHP 页面中，您正在阅读参数名称 user $_REQUEST['user'] 我认为这可能会导致问题...在 php 中会像 NULL 一样吗？尝试在 Java 和 PHP 上使用相同的名称。

标签： java android


【解决方案1】：

我可以看到，在您的 java 代码中，您正在发送 http-param username 但在您的 PHP 页面中您正在阅读参数名称用户 $_REQUEST['user'] 我认为这可能会导致问题......它会像空值在PHP？

尝试在 Java 和 PHP 上使用相同的名称 你需要改变android中的行如下

nameValuePairs.add(new BasicNameValuePair("user",abdu));

【讨论】：

    【解决方案2】：

    大量搜索并找到方法

    $user=$_REQUEST['user'];

    php改成

    $user=$_REQUEST['username'];

    将完美运行..

    感谢亚森

    https://stackoverflow.com/users/3604083/yazan

    【讨论】：

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