在微调器适配器中插入数据后出错

Question

我有一个问题，一个屏幕上有两个微调器，两个微调器在 JSON 解析后都被填充，而第二个微调器在从第一个微调器中选择项目后被填充；我想;第一次当我们打开屏幕时，微调器显示选择关键字，但是当我们想要更改第一个微调器中的所选项目时，它会显示所有解析的数据。但在尝试这样做之后，我收到了一条错误消息。不知道怎么去除呢？关于这个问题我希望你能帮个忙。

错误：

09-19 14:27:39.103: ERROR/AndroidRuntime(807): FATAL EXCEPTION: main
09-19 14:27:39.103: ERROR/AndroidRuntime(807): java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:257)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at java.util.ArrayList.get(ArrayList.java:311)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.ArrayAdapter.getItem(ArrayAdapter.java:298)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:351)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.Spinner.makeAndAddView(Spinner.java:189)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.Spinner.layout(Spinner.java:148)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.Spinner.onLayout(Spinner.java:112)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.view.View.layout(View.java:7035)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1249)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1238)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.LinearLayout.onLayout(LinearLayout.java:1044)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.view.View.layout(View.java:7035)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1249)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1125)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.LinearLayout.onLayout(LinearLayout.java:1042)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.view.View.layout(View.java:7035)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1249)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1125)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.LinearLayout.onLayout(LinearLayout.java:1042)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.view.View.layout(View.java:7035)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.view.View.layout(View.java:7035)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.view.View.layout(View.java:7035)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.view.View.layout(View.java:7035)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.view.ViewRoot.performTraversals(ViewRoot.java:1045)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.os.Looper.loop(Looper.java:123)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at android.app.ActivityThread.main(ActivityThread.java:4627)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at java.lang.reflect.Method.invokeNative(Native Method)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at java.lang.reflect.Method.invoke(Method.java:521)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-19 14:27:39.103: ERROR/AndroidRuntime(807):     at dalvik.system.NativeStart.main(Native Method)   

代码在这里

package com.equinix.android.sitevisit;


import java.util.ArrayList;
import java.util.Calendar;

import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.PreferenceManager;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.Spinner;
import android.widget.Toast;

import com.equinix.android.adapter.SiteVisit_CagesAdapter;
import com.equinix.android.adapter.SiteVisit_IBXAdapter;
import com.equinix.android.common.LoginScreen;
import com.equinix.android.common.MenuScreen;
import com.equinix.android.common.R;
import com.equinix.android.parsing.Parse_Json;
import com.equinix.android.servicecall.Service_Call;

public class Site_Visit_Details extends Activity {
    /** Called when the activity is first created. */

     ImageButton _siteVisit_Home, _siteVisit_Logout, _siteVisit_AddVisitor, _siteVisit_StartDateButton, _siteVisit_EndDateButton, _siteVisit_Next, _siteVisit_CheckBox;
     EditText _siteVisit_StartDate, _siteVisit_EndDate, _siteVisit_AdditionalInfo;
     Spinner _siteVisit_IBX, _siteVisit_Cage;
     ArrayAdapter statusAdapter;
     Bundle bundle;
    private int mYear;
    private int mMonth;
    private int mDay;
    private int flagValue, checkBoxFlag=0;
    static final int DATE_DIALOG_ID = 0;
    public static int count=0;
    public static ArrayList<String> cage_Id = new ArrayList<String>();
    public static ArrayList<String> cage_Name = new ArrayList<String>();
    public static ArrayList<String> cage_NaturalKey = new ArrayList<String>();
    public static boolean flag_cages = false;
    public static ArrayList<String> firstName = new ArrayList<String>();
    public static ArrayList<String> lastName = new ArrayList<String>();
    public static ArrayList<String> companyName = new ArrayList<String>();
    SharedPreferences prefs;
    public static final String PREFS_NAME = "MyPrefsFile";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.site_visit_details);

        bundle = getIntent().getExtras();


        _siteVisit_Home = (ImageButton)findViewById(R.id.home);
        _siteVisit_Logout = (ImageButton)findViewById(R.id.logout);
        _siteVisit_AddVisitor = (ImageButton)findViewById(R.id.addVisitorImageButton);
        _siteVisit_StartDateButton = (ImageButton)findViewById(R.id.startDateImageButton);
        _siteVisit_EndDateButton = (ImageButton)findViewById(R.id.endDateImageButton);
        _siteVisit_Next = (ImageButton)findViewById(R.id.nextImageButton);
        _siteVisit_CheckBox =(ImageButton)findViewById(R.id.checkBox);

        _siteVisit_StartDate = (EditText)findViewById(R.id.startDateEditText);
        _siteVisit_EndDate = (EditText)findViewById(R.id.endDateEditText);
        _siteVisit_AdditionalInfo = (EditText)findViewById(R.id.additionalInformationEditText);

        _siteVisit_IBX = (Spinner)findViewById(R.id.ibxSpinner);
        _siteVisit_Cage = (Spinner)findViewById(R.id.cageSpinner);
        LoginScreen.name.add("Select");
        statusAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item , LoginScreen.name);//Sets an status adapter
        statusAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        _siteVisit_IBX.setAdapter(statusAdapter);
        _siteVisit_Cage.setAdapter(statusAdapter);
        //Get Data from Parsing
        try{
        HttpPost post = new HttpPost("http://122.180.114.68/eqixmobile/siteservice/um/ibx");
        StringEntity se = new StringEntity("{\"credentials\":{\"username\":\"mobileuser1\",\"password\":\"welcome1\"}}");
    /*  HttpPost post = new HttpPost("http://192.168.0.9/DEVELOPMENT/VERSIONED/Equinix/trunk/iphone/login");
        StringEntity se = new StringEntity("{\"ibx\":{\"credentials\":{\"password\":\"welcome1\",\"userid\":\"mobileuser1\"}}}");*/

        final Service_Call obj = new Service_Call(post, se, "mobileuser1", "welcome1",false);
        final ProgressDialog dialog = ProgressDialog.show(Site_Visit_Details.this, "   EQUINIX                   ", "Loading....   ", true);

        final Handler handler = new Handler() {

           public void handleMessage(Message msg) {

                    statusAdapter.notifyDataSetChanged();
                   dialog.dismiss();

              }
           };

           final Thread checkUpdate = new Thread() {

               public void run() {

                   LoginScreen.name.clear();                                
                   String json_string = obj.call_Service();
                   new Parse_Json(json_string).parse();
                   handler.sendEmptyMessage(0);
               }
           };
           checkUpdate.start();
        }catch(Exception e)
        {
            e.printStackTrace();
        }
      /*    Intent intent = new Intent(LoginScreen.this,MenuScreen.class);
        startActivity(intent);*/

        //statusAdapter.add(LoginScreen.name);
        SiteVisit_IBXAdapter adapter = new SiteVisit_IBXAdapter(LoginScreen.name, this);


        if(bundle.getInt("screen_flag")!=0)
        {
        try{
            prefs = getSharedPreferences(PREFS_NAME, 0);
        String savedIBXString = prefs.getString("savedIBXString",null);
        String savedCagesString = prefs.getString("savedCagesString", null);
        String startDate = prefs.getString("startDate", null);
        String endDate= prefs.getString("endDate", null);
        String addInfo = prefs.getString("additionalInfo", null);
        _siteVisit_StartDate.setText(startDate);
        _siteVisit_EndDate.setText(endDate);
        _siteVisit_AdditionalInfo.setText(addInfo);
        for(int i=0;i<LoginScreen.name.size();i++)
        {
            if(savedIBXString.equals(_siteVisit_IBX.getItemAtPosition(i).toString()))
            {
                _siteVisit_IBX.setSelection(i);
            }
        }
        for(int i=0;i<cage_Name.size();i++)
        {
            if(savedCagesString.equals(_siteVisit_Cage.getItemAtPosition(i).toString()))
            {
                _siteVisit_Cage.setSelection(i);
            }
        }
        }catch(Exception e)
        {
            e.printStackTrace();
        }

        }
        _siteVisit_Home.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {

                Intent intent = new Intent(Site_Visit_Details.this, MenuScreen.class);
                startActivity(intent);

            }
        });

        try {

                firstName = bundle.getStringArrayList("FirstName");
                lastName = bundle.getStringArrayList("LastName");
                companyName = bundle.getStringArrayList("Company");

                for(int i=0; i<firstName.size(); i++){
                    System.out.println("Name is ======== "+firstName.get(i)+" "+lastName.get(i)+" Company name=====>> "+companyName.get(i));
                }

        } catch (Exception e1) {

            e1.printStackTrace();
        }

        _siteVisit_Logout.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {

                Intent intent = new Intent(Site_Visit_Details.this, LoginScreen.class);
                startActivity(intent);

            }
        });

        _siteVisit_Next.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                try{
                System.out.println(" Size of ArrayList is  "+firstName.size());
                if(firstName.size()!=0){
                    if((_siteVisit_StartDate.getText().toString().length()!=0) &&(_siteVisit_EndDate.getText().toString().length()!=0))
                    {
                        Intent intent = new Intent(Site_Visit_Details.this, Site_Visit_Login.class);
                        intent.putExtra("IBXName", _siteVisit_IBX.getSelectedItem().toString());
                        intent.putExtra("CagesName", _siteVisit_Cage.getSelectedItem().toString());
                        intent.putExtra("StartDate", _siteVisit_StartDate.getText().toString());
                        intent.putExtra("EndDate", _siteVisit_EndDate.getText().toString());
                        intent.putStringArrayListExtra("FirstName", firstName);
                        intent.putStringArrayListExtra("LastName", lastName);
                        intent.putStringArrayListExtra("Company", companyName);
                        startActivity(intent);
                    }else{
                        Toast.makeText(Site_Visit_Details.this, "Please fill all mandatory field", Toast.LENGTH_SHORT).show();
                    }
                }
                else{
                    AlertDialog alertDialog = new AlertDialog.Builder(Site_Visit_Details.this).create();
                       alertDialog.setTitle("EQUINIX");
                       alertDialog.setMessage("Please Add Visitor First");
                       alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
                           public void onClick(DialogInterface dialog, int which) {

                               return;
                           }
                       });

                       alertDialog.show();
                }
                }catch(Exception e)
                {
                    Toast.makeText(Site_Visit_Details.this, "Please select add visitor", Toast.LENGTH_SHORT).show();
                }

            }
        });

        _siteVisit_IBX.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            /**
             * Called when a new item was selected (in the Spinner)
             */
            public void onItemSelected(AdapterView<?> parent,
                View view, int pos, long id) {
                try{
                    arrayList_clear();
                    SiteVisit_IBXAdapter adapter = new SiteVisit_IBXAdapter(LoginScreen.name, Site_Visit_Details.this);
                    _siteVisit_IBX.setAdapter(adapter);
                    prefs = PreferenceManager.getDefaultSharedPreferences( getBaseContext());
                     SharedPreferences.Editor prefEditor = prefs.edit();
                  prefEditor.putString("savedValue",_siteVisit_IBX.getSelectedItem().toString());

                HttpPost post = new HttpPost("http://122.180.114.68/eqixmobile/siteservice/um/cages");
                StringEntity se = new StringEntity("{\"ibx\":{\"credentials\":{\"username\":\"mobileuser1\",\"password\":\"welcome1\"},\"userkey\":\"68782\",\"permissionCode\":\"PLACE_BASIC_SERVICES\",\"id\":\""+LoginScreen.id.get(pos)+"\",\"name\":\""+LoginScreen.name.get(pos)+"\",\"naturalKey\":\""+LoginScreen.naturalKey.get(pos)+"\"}}");
                final Service_Call obj = new Service_Call(post, se, "mobileuser1", "welcome1",false);
            /*String json_Response = obj.call_Service();
                new Parse_Json(json_Response).parse_Cages();*/
                    /*SiteVisit_CagesAdapter adapter = new SiteVisit_CagesAdapter(Site_Visit_Details.cage_Name, Site_Visit_Details.this);

                    _siteVisit_Cage.setAdapter(adapter);*/

                    final ProgressDialog dialog = ProgressDialog.show(Site_Visit_Details.this, "EQUINIX     ", "Loading....   ", true);

                    final Handler handler = new Handler() {

                       public void handleMessage(Message msg) {

                            SiteVisit_CagesAdapter adapter = new SiteVisit_CagesAdapter(Site_Visit_Details.cage_Name, Site_Visit_Details.this);

                            _siteVisit_Cage.setAdapter(adapter);
                               dialog.dismiss();

                          }
                       };

                       final Thread checkUpdate = new Thread() {

                           public void run() {

                               String json_Response = obj.call_Service();
                                new Parse_Json(json_Response).parse_Cages();
                               handler.sendEmptyMessage(0);
                           }
                       };
                       checkUpdate.start();
                }catch(Exception e)
                {
                    e.printStackTrace();
                }
            }


            private void arrayList_clear() {
                Site_Visit_Details.cage_Id.clear();
                Site_Visit_Details.cage_Name.clear();
                Site_Visit_Details.cage_NaturalKey.clear();

            }

            public void onNothingSelected(AdapterView parent) {
              // Do nothing.
            }
        });

        _siteVisit_Cage.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            /**
             * Called when a new item was selected (in the Spinner)
             */
            public void onItemSelected(AdapterView<?> parent,
                View view, int pos, long id) {
                   prefs = PreferenceManager.getDefaultSharedPreferences( getBaseContext());
                   SharedPreferences.Editor prefEditor = prefs.edit();
                prefEditor.putString("savedCagesString",_siteVisit_Cage.getSelectedItem().toString());
            }

            @Override
            public void onNothingSelected(AdapterView<?> arg0) {


            }
        });
        _siteVisit_StartDateButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                flagValue = 0;
                showDialog(DATE_DIALOG_ID);


            }
        });

        _siteVisit_EndDateButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {

                flagValue = 1;
                showDialog(DATE_DIALOG_ID);

            }
        });

        _siteVisit_AddVisitor.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {

                Intent intent = new Intent(Site_Visit_Details.this, Site_Visit_AddVisitor.class);
                startActivity(intent);

            }
        });

        _siteVisit_CheckBox.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {

                if(checkBoxFlag==0){
                    _siteVisit_CheckBox.setBackgroundResource(R.drawable.check_box_checked);
                    checkBoxFlag=1;
                }else{
                    _siteVisit_CheckBox.setBackgroundResource(R.drawable.check_box_unchecked);
                    checkBoxFlag=0;
                }

            }
        });


        final Calendar c = Calendar.getInstance();
        mYear = c.get(Calendar.YEAR);
        mMonth = c.get(Calendar.MONTH);
        mDay = c.get(Calendar.DAY_OF_MONTH);


    }


    private DatePickerDialog.OnDateSetListener mDateSetListener =
        new DatePickerDialog.OnDateSetListener() {

            public void onDateSet(DatePicker view, int year, 
                                  int monthOfYear, int dayOfMonth) {
                mYear = year;
                mMonth = monthOfYear;
                mDay = dayOfMonth;
                updateDisplay(flagValue);
            }
        };

    private void updateDisplay(int flag) {
        if(flag==0){
        _siteVisit_StartDate.setText(
            new StringBuilder()
                    // Month is 0 based so add 1
                    .append(mMonth + 1).append("/")
                    .append(mDay).append("/")
                    .append(mYear).append(" "));
        }
        else{
            _siteVisit_EndDate.setText(
                    new StringBuilder()
                            // Month is 0 based so add 1
                            .append(mMonth + 1).append("/")
                            .append(mDay).append("/")
                            .append(mYear).append(" "));
        }
    }


    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case DATE_DIALOG_ID:
            return new DatePickerDialog(this,
                        mDateSetListener,
                        mYear, mMonth, mDay);

        }
        return null;
    }
    @Override
    protected void onStop(){
       super.onStop();

      // We need an Editor object to make preference changes.
      // All objects are from android.context.Context
      SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
      SharedPreferences.Editor editor = settings.edit();
      editor.putString("savedIBXString", _siteVisit_IBX.getSelectedItem().toString());
      editor.putString("savedCagesString", _siteVisit_Cage.getSelectedItem().toString());
      editor.putString("startDate", _siteVisit_StartDate.getText().toString());
      editor.putString("endDate", _siteVisit_EndDate.getText().toString());
      editor.putString("additionalInfo", _siteVisit_AdditionalInfo.getText().toString());
      // Commit the edits!
      editor.commit();
    }

}

Answer 1

检查您在适配器中插入的 ArrayList 对象（如果它不为空），使用日志，然后双击 LogCat 中的错误以将您重定向到出现错误的代码行。