Android的ListView适配器显示最后一个项目点击

我的ListView适配器有一个问题，一切正在解析VIA JSON到列表中查看就好，但当我点击ListView时，它总是显示我从最后解析的结果json在ListView中。Android的ListView适配器显示最后一个项目点击

这是我的第一类叫做乔布斯：

public class Jobs extends ListActivity { 

// JSON Node names 
private static final String jobs = "jobs"; 
private static final String job = "job"; 
private static final String pays = "pays"; 
private static final String ready_at = "ready_at"; 
private static final String due_by = "due_by"; 
private static final String customer_reference = "customer_reference"; 
private static final String pieces = "pieces"; 
private static final String weight = "weight"; 
private static final String pickup_name = "pickup_name"; 
private static final String pickup_addr1 = "pickup_addr1"; 
private static final String pickup_city = "pickup_city"; 
private static final String pickup_state = "pickup_state"; 
private static final String pickup_zip_postal = "pickup_zip_postal"; 
private static final String deliver_name = "deliver_name"; 
private static final String deliver_addr1 = "deliver_addr1"; 
private static final String deliver_city = "deliver_city"; 
private static final String deliver_state = "deliver_state"; 
private static final String deliver_zip_postal = "deliver_zip_postal"; 
private static final String signature_required = "signature_required"; 
private static final String pickup_to_see = "pickup_to_see"; 
private static final String pickup_room = "pickup_room"; 
private static final String pickup_phone = "pickup_phone"; 
private static final String deliver_to_see = "deliver_to_see"; 
private static final String deliver_room = "deliver_room"; 
private static final String pickup_special_instr = "pickup_special_instr"; 
private static final String deliver_special_instr = "deliver_special_instr"; 
private static final String deliver_phone = "deliver_phone"; 

String JOB, PAYS, READY_AT, DUE_BY, CUSTOMER_REFERENCE, PIECES, WEIGHT, PICKUP_NAME, PICKUP_ADDR1, PICKUP_CITY, PICKUP_STATE, 
     PICKUP_ZIP_POSTAL, DELIVER_NAME, DELIVER_ADDR1, DELIVER_CITY, DELIVER_STATE, DELIVER_ZIP_POSTAL, SIGNATURE_REQUIRED, 
     PICKUP_TO_SEE, PICKUP_ROOM, PICKUP_PHONE, DELIVER_TO_SEE, DELIVER_ROOM, PICKUP_SPECIAL_INSTR, DELIVER_SPECIAL_INSTR, 
     DELIVER_PHONE; 

// Strings 
String username, password, firstName, lastName, lastLatitudeUpdate, dvrcheckin, dvrScheduleToWork, dvrStartTime, jobs_assigned; 
int checkedin, Minute, Hour, Minutedvr, Hourdvr, status; 

Vibrator vib; 


@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.jobs); 
    vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 

    new ParseJobs().execute(); 


    TextView assigned = (TextView) findViewById(R.id.assigned); 

    if (jobs_assigned.matches("0")){ 
    assigned.setText("You have no jobs assigned"); 
    } else { 
     assigned.setVisibility(View.GONE); 
    } 


    // selecting single ListView item 
    ListView lv = getListView(); 

    // Launching new screen on Selecting Single ListItem 
    lv.setOnItemClickListener(new OnItemClickListener() { 

     @Override 
     public void onItemClick(AdapterView<?> parent, View view, 
       int position, long ide) { 

      vib.vibrate(40); 

      // Starting new intent 
      Intent in = new Intent(getApplicationContext(), 
        SingleMenuItemActivity.class); 
      in.putExtra(pays, PAYS); 
      in.putExtra(job, JOB); 
      in.putExtra(ready_at, READY_AT); 
      in.putExtra(due_by, DUE_BY); 
      in.putExtra(customer_reference, CUSTOMER_REFERENCE); 
      in.putExtra(pieces, PIECES); 
      in.putExtra(weight, WEIGHT); 
      in.putExtra(pickup_name, PICKUP_NAME); 
      in.putExtra(pickup_addr1, PICKUP_ADDR1); 
      in.putExtra(pickup_city, PICKUP_CITY); 
      in.putExtra(pickup_state, PICKUP_STATE); 
      in.putExtra(pickup_zip_postal, PICKUP_ZIP_POSTAL); 
      in.putExtra(deliver_name, DELIVER_NAME); 
      in.putExtra(deliver_addr1, DELIVER_ADDR1); 
      in.putExtra(deliver_city, DELIVER_CITY); 
      in.putExtra(deliver_state, DELIVER_STATE); 
      in.putExtra(deliver_zip_postal, DELIVER_ZIP_POSTAL); 
      in.putExtra(signature_required, SIGNATURE_REQUIRED); 
      in.putExtra(pickup_to_see, PICKUP_TO_SEE); 
      in.putExtra(pickup_room, PICKUP_ROOM); 
      in.putExtra(pickup_phone, PICKUP_PHONE); 
      in.putExtra(deliver_to_see, DELIVER_TO_SEE); 
      in.putExtra(deliver_room, DELIVER_ROOM); 
      in.putExtra(pickup_special_instr, PICKUP_SPECIAL_INSTR); 
      in.putExtra(deliver_special_instr, DELIVER_SPECIAL_INSTR); 
      in.putExtra(deliver_phone, DELIVER_PHONE); 

      startActivity(in); 
      Jobs.this.overridePendingTransition(R.anim.fadein, R.anim.fadeout); 

     } 
    }); 
} 

public class ParseJobs extends AsyncTask<Void, Void, Void> { 

    // Hashmap for ListView 
    ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>(); 

    // contacts JSONArray 
    JSONArray JOBS; 

    ProgressDialog VerifyDriver; 

    @Override 
    protected void onPreExecute() { 

     VerifyDriver = ProgressDialog.show(Jobs.this, "Getting Your Jobs", "Loading Data... Please Wait..."); 
     WindowManager.LayoutParams lp = VerifyDriver.getWindow().getAttributes(); 
     VerifyDriver.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND); 
     lp.dimAmount = .65f; 
     VerifyDriver.getWindow().setAttributes(lp); 

     Intent i = getIntent(); 
     username = i.getExtras().getString("uid"); 
     password = i.getExtras().getString("pwd"); 
     firstName = i.getExtras().getString("firstName"); 
     lastName = i.getExtras().getString("lastName"); 
     lastLatitudeUpdate = i.getExtras().getString("lastLatitudeUpdate"); 
     Minute = i.getExtras().getInt("Minute"); 
     Hour = i.getExtras().getInt("Hour"); 
     dvrcheckin = i.getExtras().getString("check-in"); 
     Hourdvr = i.getExtras().getInt("Hourdvr"); 
     Minutedvr = i.getExtras().getInt("Minutedvr"); 
     status = i.getExtras().getInt("status"); 
     dvrScheduleToWork = i.getExtras().getString("dvrScheduleToWork"); 
     dvrStartTime = i.getExtras().getString("dvrStartTime"); 
     jobs_assigned = i.getExtras().getString("jobs_assigned"); 
    } 

    @Override 
    protected Void doInBackground(Void... params) { 

     // getting JSON string from URL 
     JSONObject json = JSONfunction.getJSONfromURL("http://www.jetdelivery.com/mobile/api/getresourcestatus/?type=json&uid=" + (username) + "&pwd=" + (password)); 

     try { 
      // Getting Array of Contacts 
      JOBS = json.getJSONArray(jobs); 

      // looping through All Contacts 
      for (int i1 = 0; i1 < JOBS.length(); i1++) { 
       JSONObject c = JOBS.getJSONObject(i1); 

       // Storing each json item in variable 
       JOB = c.getString(job); 
       PAYS = c.getString(pays); 
       READY_AT = c.getString(ready_at); 
       DUE_BY = c.getString(due_by); 
       DELIVER_PHONE = c.getString(deliver_phone); 
       PIECES = c.getString(pieces); 
       WEIGHT = c.getString(weight); 
       PICKUP_NAME = c.getString(pickup_name); 
       PICKUP_ADDR1 = c.getString(pickup_addr1); 
       PICKUP_CITY = c.getString(pickup_city); 
       PICKUP_STATE = c.getString(pickup_state); 
       PICKUP_ZIP_POSTAL = c.getString(pickup_zip_postal); 
       DELIVER_NAME = c.getString(deliver_name); 
       DELIVER_ADDR1 = c.getString(deliver_addr1); 
       DELIVER_CITY = c.getString(deliver_city); 
       DELIVER_STATE = c.getString(deliver_state); 
       DELIVER_ZIP_POSTAL = c.getString(deliver_zip_postal); 
       SIGNATURE_REQUIRED = c.getString(signature_required); 
       PICKUP_TO_SEE = c.getString(pickup_to_see); 
       PICKUP_ROOM = c.getString(pickup_room); 
       PICKUP_PHONE = c.getString(pickup_phone); 
       DELIVER_TO_SEE = c.getString(deliver_to_see); 
       DELIVER_ROOM = c.getString(deliver_room); 
       PICKUP_SPECIAL_INSTR = c.getString(pickup_special_instr); 
       DELIVER_SPECIAL_INSTR = c.getString(deliver_special_instr); 
       CUSTOMER_REFERENCE = c.getString(customer_reference); 

       // creating new HashMap 
       HashMap<String, String> map = new HashMap<String, String>(); 

       // adding each child node to HashMap key => value 
       map.put(job, JOB); 
       map.put(pays, PAYS); 
       map.put(ready_at, READY_AT); 
       // map.put(weight, mobile); 

       // adding HashList to ArrayList 
       contactList.add(map); 
      } 
     } catch (JSONException e) { 
      e.printStackTrace(); 
     } 
     return null; 
    } 

    @Override 
    protected void onPostExecute(Void result) { 
     super.onPostExecute(result); 

     WindowManager.LayoutParams params = getWindow().getAttributes(); 
     Jobs.this.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND); 
     params.x = 0; 
     params.height = 520; 
     params.width = 480; 
     params.y = 200; 
     params.dimAmount = .70f; 
     Jobs.this.getWindow().setAttributes(params); 

     /** Updating parsed JSON data into ListView */ 
     ListAdapter adapter = new SimpleAdapter(Jobs.this, contactList, R.layout.list_item, new String[] { job, pays, ready_at }, new int[] { R.id.job1, R.id.pays1, R.id.ready_at1 }); 
     setListAdapter(adapter); 

     VerifyDriver.dismiss(); 

    } 
} 

@Override 
protected void onResume() { 
    super.onResume(); 
    Jobs.this.overridePendingTransition(R.anim.fadein, R.anim.fadeout); 
} 

@Override 
protected void onPause() { 
    super.onPause(); 
    Jobs.this.overridePendingTransition(R.anim.fadein, R.anim.fadeout); 

} 

@Override 
public void onBackPressed() { 
    vib.vibrate(40); 

    // Send username and password strings into screen1 class 
    Intent i = new Intent(Jobs.this, screen1.class); 
    i.putExtra("uid", username); 
    i.putExtra("pwd", password); 
    i.putExtra("Minute", Minute); 
    i.putExtra("Hour", Hour); 
    i.putExtra("firstName", firstName); 
    i.putExtra("lastName", lastName); 
    i.putExtra("check-in", dvrcheckin); 
    i.putExtra("Hourdvr", Hourdvr); 
    i.putExtra("Minutedvr", Minutedvr); 
    i.putExtra("status", status); 
    i.putExtra("lastLatitudeUpdate", lastLatitudeUpdate); 
    i.putExtra("dvrScheduleToWork", dvrScheduleToWork); 
    i.putExtra("dvrStartTime", dvrStartTime); 
    i.putExtra("jobs_assigned", jobs_assigned); 
    Jobs.this.finish(); 
    startActivity(i); 
    Jobs.this.overridePendingTransition(R.anim.fadein, R.anim.fadeout); 

} 

@Override 
protected void onRestart() { 
    super.onRestart(); 
    Intent i = new Intent(this, AgentPortalActivity.class); 
    startActivity(i); 
    Jobs.this.overridePendingTransition(R.anim.fadein, R.anim.fadeout); 

} 
}

继承人我第二类只显示有关作业当你点击ListView的更多信息：

public class SingleMenuItemActivity extends Activity { 

// JSON Node names 

private static final String job = "job"; 
private static final String pays = "pays"; 
private static final String ready_at = "ready_at"; 
private static final String due_by = "due_by"; 
private static final String customer_reference = "customer_reference"; 
private static final String pieces = "pieces"; 
private static final String weight = "weight"; 
private static final String pickup_name = "pickup_name"; 
private static final String pickup_addr1 = "pickup_addr1"; 
private static final String pickup_city = "pickup_city"; 
private static final String pickup_state = "pickup_state"; 
private static final String pickup_zip_postal = "pickup_zip_postal"; 
private static final String deliver_name = "deliver_name"; 
private static final String deliver_addr1 = "deliver_addr1"; 
private static final String deliver_city = "deliver_city"; 
private static final String deliver_state = "deliver_state"; 
private static final String deliver_zip_postal = "deliver_zip_postal"; 
private static final String signature_required = "signature_required"; 
private static final String pickup_to_see = "pickup_to_see"; 
private static final String pickup_room = "pickup_room"; 
private static final String pickup_phone = "pickup_phone"; 
private static final String deliver_to_see = "deliver_to_see"; 
private static final String deliver_room = "deliver_room"; 
private static final String pickup_special_instr = "pickup_special_instr"; 
private static final String deliver_special_instr = "deliver_special_instr"; 
private static final String deliver_phone = "deliver_phone"; 



String JOB, PAYS, READY_AT, DUE_BY, CUSTOMER_REFERENCE, PIECES, WEIGHT, SIGNATURE_REQUIRED, // General Job Information 
PICKUP_NAME,PICKUP_TO_SEE, PICKUP_ROOM, PICKUP_ADDR1, PICKUP_CITY, PICKUP_STATE, PICKUP_ZIP_POSTAL, PICKUP_PHONE, PICKUP_SPECIAL_INSTR, // Pickup Job Information 
DELIVER_NAME, DELIVER_ADDR1, DELIVER_CITY, DELIVER_STATE, DELIVER_ZIP_POSTAL, DELIVER_TO_SEE, DELIVER_ROOM, DELIVER_SPECIAL_INSTR, DELIVER_PHONE, // Deliver Job Information 

username, password, firstName, lastName, lastLatitudeUpdate, dvrcheckin, dvrScheduleToWork, dvrStartTime, jobs_assigned; // Original Strings Passed through from main Activity 
int checkedin, Minute, Hour, Minutedvr, Hourdvr, status; // Integers Passed through from main Activity 

Vibrator vib; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    setContentView(R.layout.single_menu_item_activity); 
    vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 

    Get_Intents(); 

    //////////////////////////////////////////////////////// 
    ////////  Initializing all TextViews  //////// 
    //////////////////////////////////////////////////////// 
    TextView trackno = (TextView) findViewById(R.id.trackno); 
    TextView readyAT = (TextView) findViewById(R.id.readyAT); 
    TextView jobpays = (TextView) findViewById(R.id.jobpays); 
    TextView pcs = (TextView) findViewById(R.id.pcs); 
    TextView weightt = (TextView) findViewById(R.id.weightt); 
    TextView custref = (TextView) findViewById(R.id.custref); 
    TextView dueby = (TextView) findViewById(R.id.dueby); 
    TextView sigreq = (TextView) findViewById(R.id.sigreq); 

    ///////////////  PickUp TextViews ////////////////////// 
    TextView puname = (TextView) findViewById(R.id.puname); 
    TextView puaddress = (TextView) findViewById(R.id.puaddress); 
    TextView puroom = (TextView) findViewById(R.id.puroom); 
    TextView pusee = (TextView) findViewById(R.id.pusee); 
    TextView puphone = (TextView) findViewById(R.id.puphone); 
    TextView puinstructions = (TextView) findViewById(R.id.puinstructions); 

    //////////////  Deliver TextViews  /////////////////// 
    TextView delname = (TextView) findViewById(R.id.delname); 
    TextView deladdress = (TextView) findViewById(R.id.deladdress); 
    TextView delroom = (TextView) findViewById(R.id.delroom); 
    TextView delsee = (TextView) findViewById(R.id.delsee); 
    TextView delphone = (TextView) findViewById(R.id.delphone); 
    TextView delinstructions = (TextView) findViewById(R.id.delinstructions); 

    /////////////  Miscellaneous TextViews  ///////////////// 
    TextView origin = (TextView) findViewById(R.id.origin); 
    TextView destination = (TextView) findViewById(R.id.destination); 
    origin.setText(Html.fromHtml("<i><u>ORIGIN</u></i> ")); 
    destination.setText(Html.fromHtml("<i><u>DESTINATION</u></i> ")); 


    ///////////////////////////////// 
    // Setting String to TextViews // 
    ///////////////////////////////// 
    trackno.setText(JOB); 
    readyAT.setText(READY_AT); 
    jobpays.setText(PAYS); 
    pcs.setText(PIECES); 
    weightt.setText((WEIGHT) + " Lbs"); 
    custref.setText(CUSTOMER_REFERENCE); 
    dueby.setText(DUE_BY); 

    ///////// Pickup Info /////////// 
    puname.setText(PICKUP_NAME); 
    puaddress.setText((PICKUP_ADDR1) + "\n" + (PICKUP_CITY) + " " + (PICKUP_STATE) + " " + (PICKUP_ZIP_POSTAL)); 
    puroom.setText(PICKUP_ROOM); 
    pusee.setText(PICKUP_TO_SEE); 
    puphone.setText(PICKUP_PHONE); 
    puinstructions.setText(PICKUP_SPECIAL_INSTR); 

    ///////// Deliver Info ////////// 
    delname.setText(DELIVER_NAME); 
    deladdress.setText((DELIVER_ADDR1) + "\n" + (DELIVER_CITY) + " " + (DELIVER_STATE) + " " + (DELIVER_ZIP_POSTAL)); 
    delroom.setText(DELIVER_ROOM); 
    delsee.setText(DELIVER_TO_SEE); 
    delphone.setText(DELIVER_PHONE); 
    delinstructions.setText(DELIVER_SPECIAL_INSTR); 

    //// Fixing String To Display //// 
    //// Yes or No Instead of Y or N //// 
    if (SIGNATURE_REQUIRED.matches("Y")){ 
     sigreq.setText("Yes"); 
    } 
    if (SIGNATURE_REQUIRED.matches("N")){ 
     sigreq.setText("No");  
    } 


    Accept_Job_Button_Instructions(); 
    Deny_Job_Button_Instructions(); 

} 



private void Deny_Job_Button_Instructions() { 
    ///////////////// Deny Button /////////////////////////////// 
    Button deny = (Button) findViewById(R.id.deny); 
    deny.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 

      vib.vibrate(40); 
      startActivity(new Intent(SingleMenuItemActivity.this, JobDenied.class)); //SingleMenuItemActivity.this.finish(); 
      overridePendingTransition(R.anim.fadein, R.anim.fadeout);   
     }   
    }); 
} 


private void Accept_Job_Button_Instructions() { 
    ///////////////// Accept Button ////////////////////////////// 
    Button accept = (Button) findViewById(R.id.accept); 
    accept.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View v) { 

      vib.vibrate(40); 
     }  
    }); 
} 

// First Initialize upon Starting Activity // 
private void Get_Intents() { 
    // getting intent data 
    Intent in = getIntent(); 

    // Get JSON values from previous intent 
    PAYS = in.getStringExtra(pays); 
    JOB = in.getStringExtra(job); 
    READY_AT = in.getStringExtra(ready_at); 
    DUE_BY = in.getStringExtra(due_by); 
    CUSTOMER_REFERENCE = in.getStringExtra(customer_reference); 
    PIECES = in.getStringExtra(pieces); 
    WEIGHT = in.getStringExtra(weight); 
    SIGNATURE_REQUIRED = in.getStringExtra(signature_required); 

    // PickUp Info 
    PICKUP_NAME = in.getStringExtra(pickup_name); 
    PICKUP_ADDR1 = in.getStringExtra(pickup_addr1); 
    PICKUP_CITY = in.getStringExtra(pickup_city); 
    PICKUP_STATE = in.getStringExtra(pickup_state); 
    PICKUP_ZIP_POSTAL = in.getStringExtra(pickup_zip_postal); 
    PICKUP_TO_SEE = in.getStringExtra(pickup_to_see); 
    PICKUP_ROOM = in.getStringExtra(pickup_room); 
    PICKUP_PHONE = in.getStringExtra(pickup_phone); 
    PICKUP_SPECIAL_INSTR = in.getStringExtra(pickup_special_instr); 

    //Deliver Info 
    DELIVER_NAME = in.getStringExtra(deliver_name); 
    DELIVER_ADDR1 = in.getStringExtra(deliver_addr1); 
    DELIVER_CITY = in.getStringExtra(deliver_city); 
    DELIVER_STATE = in.getStringExtra(deliver_state); 
    DELIVER_ZIP_POSTAL = in.getStringExtra(deliver_zip_postal); 
    DELIVER_TO_SEE = in.getStringExtra(deliver_to_see); 
    DELIVER_ROOM = in.getStringExtra(deliver_room); 
    DELIVER_PHONE = in.getStringExtra(deliver_phone); 
    DELIVER_SPECIAL_INSTR = in.getStringExtra(deliver_special_instr); 

} 


@Override 
protected void onResume() { 
    super.onResume(); 
    overridePendingTransition(R.anim.fadein, R.anim.fadeout); 
} 

@Override 
protected void onPause() { 
    super.onPause(); 

    overridePendingTransition(R.anim.fadein, R.anim.fadeout); 
} 

@Override 
public void onBackPressed() { 

    Intent i = new Intent(SingleMenuItemActivity.this, AgentPortalActivity.class); 
    startActivity(i); 
    SingleMenuItemActivity.this.finish(); 
    overridePendingTransition(R.anim.fadein, R.anim.fadeout); 
} 

@Override 
protected void onRestart() { 
    super.onRestart(); 
    Intent i = new Intent(this, AgentPortalActivity.class); 
    startActivity(i); 
    overridePendingTransition(R.anim.fadein, R.anim.fadeout); 
    } 
}

这里有一些图像帮助更好地解释情况。 Job Activity

例如，我点击了工作号码。 1642554在ListView中，它会将我发送到下一个活动，但正如您所看到的，作业号码完全关闭（1642769的第二个图像实际上是ListView中的最后一个作业，并将始终显示最后一个Listview）

有什么建议吗？

这里有以下哪些skUDA建议后，我的日志：

07-17 08:37:17.158: W/dalvikvm(12096): threadid=1: thread exiting with uncaught exception (group=0x40015578) 
07-17 08:37:17.162: E/AndroidRuntime(12096): FATAL EXCEPTION: main 
07-17 08:37:17.162: E/AndroidRuntime(12096): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.jetdelivery.mobile/com.jetdelivery.mobile.SingleMenuItemActivity}: java.lang.NullPointerException 
07-17 08:37:17.162: E/AndroidRuntime(12096): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at android.os.Handler.dispatchMessage(Handler.java:99) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at android.os.Looper.loop(Looper.java:130) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at android.app.ActivityThread.main(ActivityThread.java:3687) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at java.lang.reflect.Method.invokeNative(Native Method) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at java.lang.reflect.Method.invoke(Method.java:507) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at dalvik.system.NativeStart.main(Native Method) 
07-17 08:37:17.162: E/AndroidRuntime(12096): Caused by: java.lang.NullPointerException 
07-17 08:37:17.162: E/AndroidRuntime(12096): at com.jetdelivery.mobile.SingleMenuItemActivity.onCreate(SingleMenuItemActivity.java:146) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
07-17 08:37:17.162: E/AndroidRuntime(12096): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615) 
    07-17 08:37:17.162: E/AndroidRuntime(12096):

来源

2012-07-13 John Nguyen

我可以问为什么你发送20+ Extra's'而不是将它们全部作为一个对象传递？ – BlackHatSamurai 2012-07-13 22:26:42

我对开发应用程序的知识仍然非常有限。我只是在学习到目前为止所学到的知识。 – 2012-07-13 22:32:43

你应该看看'Parcelable'接口。这将允许你传递'Objects'，而不是单独传递每个属性。这是一个链接，将有助于：http://shri.blog.kraya.co.uk/2010/04/26/android-parcel-data-to-pass-between-activities-using-parcelable-classes/ – BlackHatSamurai 2012-07-13 23:04:14

问题是，你发送到intent中的字符串（JOB，PAYS，READY_AT，DUE_BY等）被设置为最后一个，因为那是最后一次创建的视图。尝试

Object j = lv.getAdapter().getItem(position);

（object是任何数据类型的产品）在onItemClickListener，并从那里得到的字符串值。

编辑：更详细的细分。

经过对代码的进一步审查，我看到一个简单的解决方案来实现。在doInBackground方法中，您将每个字符串都设置为您从JSONArray获得的任何内容。既然你通过意图发送这些字符串，你最终会得到下载和映射的最后一项工作。我的建议：采取JSONArray JOBS并将其声明为Jobs类中的字段变量。这里可以通过内部的异步类和整个工作类访问。现在，你的onItemClickListener更改为类似：

lv.setOnItemClickListener(new OnItemClickListener() { 

    @Override 
    public void onItemClick(AdapterView<?> parent, View view, 
      int position, long ide) { 

     vib.vibrate(40); 

     // Starting new intent 
     try { 
     Intent in = new Intent(getApplicationContext(), 
       SingleMenuItemActivity.class); 
     in.putExtra("jobInfo", JOBS.getJSONObject(position).toString()); 

     startActivity(in); 
     Jobs.this.overridePendingTransition(R.anim.fadein, R.anim.fadeout); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 

    } 
});

BlaineOmega是在质疑为什么你把这么多的额外数据到你的意图是正确的。由于您正在使用JSONObjects，只需将JSONString发送到下一个活动即可。然后创建一个全球性的JSONObject并初始化它在你的onCreate像这样：

myJsonJob = new JSONObject(getIntent().getStringExtra("jobInfo"));

现在你可以使用JSONObject的方法来访问您的数据，而不是直接从意图得到它并将其存储在字符串变量，然后设置您的与这些字符串变量的textviews。（顺便说一句，你几乎可以切割出整个字符串变量一步，无论你如何通过正要

做

myTextView.setText(intent.getStringExtra("nameOfString"))

一样，在你的代码，这将是：

trackno.setText(in.getStringExtra(job)).

，而不是分配将字符串转换为变量，然后将其设置为变量，从而减少了内存使用和中间人的额外成本。）

这应该可以解决您的问题。

来源

2012-07-13 22:19:23 skUDA

你能否为我分解一下？ – 2012-07-13 22:57:29

我会做些什么来解决你的问题，再加上一些关于编码技巧的建议。我很抱歉花了一段时间回到你身边。 – skUDA 2012-07-14 01:12:48

不需要道歉，特别是当你是那个帮助我的人。我尝试了你的建议，“intent.getString（”nameOfString“））”它的字符串不断返回给我乱码（它显示屏幕上未解析的数据） – 2012-07-16 18:46:54

它看起来像你的onItemClickListener一个问题。您输入的意图是被发送到正在显示您的信息的活动（SingleMenuItemActivity）。在onItemClick()方法中，将位置传递给它。该位置是用户在ListView中选择的索引。你似乎只是将任何值存储在字符串中。

来源

2012-07-13 22:17:41 Joel

可以你向我解释我将如何解决这个问题？我试过什么skuda建议，但我认为有一些步骤失踪。 – 2012-07-16 20:40:32

Android的ListView适配器显示最后一个项目点击

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