1

我的 ListView 适配器有问题，一切都通过 json 解析到列表视图中就好了，但是当我单击 ListView 时，它总是向我显示 ListView 中最后解析的 json 的结果。

这是我的第一堂课，叫做 Jobs：

 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);

}
}

这是我的第二类，当您单击 ListView 时，它仅显示有关该作业的更多信息：

 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);
    }
}

这里有一些图片可以帮助更好地解释这种情况。 工作活动

例如，我点击了 Job no。1642554 在 ListView 中，它会将我发送到下一个活动，但正如您所见，作业编号完全关闭（带有 1642769 的第二张图像实际上是 ListView 中的最后一个作业，并且将始终向我显示最后一个 Listview）

有什么建议么？

以下是我遵循 skUDA 建议后的日志：

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):
4

2 回答 2

2

问题是您发送到意图中的字符串（JOB、PAYS、READY_AT、DUE_BY 等）被设置为最后一个，因为那是创建的最后一个视图。尝试

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

（其中对象是您的项目的任何数据类型）在您的 onItemClickListener 中，并从那里获取字符串值。

编辑：更详细的细分。

在进一步审查您的代码后，我看到了一个易于实施的解决方案。在您的 doInBackground 方法中，您将每个字符串设置为从 JSONArray 获得的任何内容。由于您通过意图发送这些字符串，因此您最终会得到下载和映射的最后一个作业。我的建议：采用 JSONArray JOBS 并将其声明为 Jobs 类中的字段变量。在这里，您的内部异步类和整个 Jobs 类都可以访问它。现在，将您的 onItemClickListener 更改为：

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 在质疑您为什么要在意图中添加如此多的额外数据时是正确的。由于您正在使用 JSONObjects，因此只需将 JSONString 发送到您的下一个活动。然后创建一个全局 JSONObject 并在你的 onCreate 中初始化它，如下所示：

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

现在您可以使用 JSONObject 方法直接访问您的数据，而不是从意图中获取数据并将其存储在字符串变量中，然后使用这些字符串变量设置您的文本视图。（顺便说一句，您几乎可以删除整个字符串变量步骤 no不管你怎么做

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

就像，在您的代码中，它将是：

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

而不是将字符串分配给变量然后用变量设置它。它减少了内存使用和中间人的额外成本。）

那应该可以解决您的问题。

于 2012-07-13T22:19:23.693 回答
0

看起来您的onItemClickListener. 您输入的意图是发送到显示您的信息的活动 ( SingleMenuItemActivity)。在该onItemClick()方法中，将位置传递给它。该位置是用户在您的 ListView 中选择的索引。您似乎只是在传递它恰好存储在字符串中的任何值。

于 2012-07-13T22:17:41.493 回答