Сбой приложения Android при нажатии на элемент в представлении списка

Question

Мое приложение выполняет следующие действия:

-Введите имя сотрудника, нажмите кнопку поиска.

-Список соответствующих имен в результате.

-При щелчке одногоиз появившихся имен.

-Открывается новое действие с указанным именем, названием, телефоном, адресом электронной почты.

Однако мое приложение вылетает, когда я щелкаю одно из появившихся имен, ононе показывает ошибок.

Это то, что я сделал до сих пор.

    public class MainActivity extends Activity
    {    
    EditText name;
    ArrayAdapter<String> nameAdapter;
    DeptDPHelper Emp;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final Button Search = (Button)findViewById(R.id.Search);

        name = (EditText)findViewById(R.id.name);
        final ListView namelist = (ListView)findViewById(R.id.LV);

        nameAdapter = new ArrayAdapter<>(getApplicationContext() , android.R.layout.simple_list_item_1);
        namelist.setAdapter(nameAdapter);

        Emp = new DeptDPHelper(getApplicationContext());
        //Inserting some data into database
        Emp.InsertEmp("AhmedMhmmd" , "010224455" , "gg@jj.com" , "xx");
        Emp.InsertEmp("MhmmdMhmoud" , "010224455" , "gg@jj.com" , "xx");
        Emp.InsertEmp("Ahmedxxx" , "010224455" , "gg@jj.com" , "xx");
        Emp.InsertDept("Finance");
        Emp.InsertDept("Sales");
        //Search button
        Search.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v) {
                Cursor cur = Emp.GetEmpname(name.getText().toString());
                nameAdapter.clear();

                if(cur != null)
                {
                    while(!cur.isAfterLast())
                    {
                        //Toast.makeText(getApplicationContext() , "Error" , Toast.LENGTH_LONG).show();
                        nameAdapter.add(cur.getString(0));
                        cur.moveToNext();
                        //nameAdapter.add("gg");
                    }
                }

                else
                {
                    Toast.makeText(getApplicationContext() , "ErrOooor" , Toast.LENGTH_LONG).show();
                }
            }
        });
            //When clicking a name from the list of results.
          namelist.setOnItemClickListener(new AdapterView.OnItemClickListener() {
              @Override
              public void onItemClick(AdapterView<?> parent, View view, int position, long id)
              {
                  String name = namelist.getItemAtPosition(position).toString(); //get the name
                  Cursor empID = Emp.getEmpID(name);  //pass the name to a method to get its ID
                  Cursor DepID = Emp.getDeptID(name);
                  empID.moveToFirst();
                  DepID.moveToFirst();
                  int eID = empID.getInt(0); //Converting ID into Integer
                  int dID = DepID.getInt(0);


                  Intent intent = new Intent(MainActivity.this, empDetails.class);
                  intent.putExtra("empName", Emp.getEmpData(eID).toString()); //getting value of name using ID
                  intent.putExtra("empTitle",Emp.getEmpData(eID).toString());
                  intent.putExtra("empPhone",Emp.getEmpData(eID).toString());
                  intent.putExtra("empEmail",Emp.getEmpData(eID).toString());
                  intent.putExtra("empDept",Emp.getDeptName(dID).toString());
                  startActivity(intent);
              }
          });
    }
  //SQLITE Part
    public static class DeptDPHelper extends SQLiteOpenHelper {
        SQLiteDatabase EmpDept;

        public DeptDPHelper(Context context) {
            super(context, "EmpDept", null, 2);
        }

        @Override
        public void onCreate(SQLiteDatabase db)
        {
            db.execSQL("create table department(DeptID integer primary key autoincrement , name text);");
            db.execSQL("create table Employee (EmpID integer primary key autoincrement , name text not null," +
                    "Title text not null , phone text not null , email text not null ," +
                    "DeptID integer, foreign key(DeptID) references department (DeptID))");

            //ContentValues row = new ContentValues();
            //db.execSQL("insert into Employee (EmpID , name , Title , phone , email ) values ('Ahmemhmmd' , '010224455' , 'gg@jj.com' , 'xx')");

        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            db.execSQL("drop table if exists department ");
            db.execSQL("drop table if exists Employee ");
            onCreate(db);
        }

        public void InsertEmp (String Empname, String phone, String Email, String title)
        {
            ContentValues roww = new ContentValues();
            //roww.put("Id",empID );
            roww.put("name", Empname);
            roww.put("Title", title);
            roww.put("phone", phone);
            roww.put("Email", Email);

            EmpDept = getWritableDatabase();
            EmpDept.insert("Employee ", null, roww);
            EmpDept.close();
        }

        public void InsertDept(String Deptname)
        {
            ContentValues row = new ContentValues();
            //row.put("Id", DeptID);
            row.put("name", Deptname);
            EmpDept = getWritableDatabase();
            EmpDept.insert("department ", null, row);
            EmpDept.close();
        }

        public Cursor GetEmpname(String namee)
        {
            EmpDept = getReadableDatabase();
            String[] arg = {namee};
            Cursor cur = EmpDept.rawQuery("select name from employee where name like ?;", new String[]{"%"+namee+"%"});
            cur.moveToFirst();
            EmpDept.close();
            return cur;
        }


        public Cursor Fetchallemployee() {
            EmpDept = getReadableDatabase();
            String[] rowdetails = {"name"};
            Cursor cursor = EmpDept.query("employee", rowdetails, null
                    , null, null, null, null);
            if (cursor != null) {
                cursor.moveToFirst();
            }
            EmpDept.close();
            return cursor;
        }
        //This method in order to get the employee id using the clicked name
        public Cursor getEmpID(String nameList)
        {
            EmpDept = getReadableDatabase();
            String[] rowID = {nameList};
            Cursor cursor = EmpDept.rawQuery("select EmpID from Employee where name like ?",rowID);
            EmpDept.close();
            if (cursor != null)
            {
                cursor.moveToFirst();
            }
            return cursor;
        }
        public Cursor getDeptID(String nameList)
        {
            EmpDept = getReadableDatabase();
            String[] rowwID = {nameList};
            Cursor curr = EmpDept.rawQuery("select DeptID from department inner join Employee on department.DeptID = Employee.DeptID where Employee.name like ? ",rowwID);
            //department d inner join Employee e on d.DeptID = e.DeptID where e.name like ?
            if (curr != null)
            {
                curr.moveToFirst();
            }
            EmpDept.close();
            return curr;
        }
    //This method for returning employee data using employee id as an input
        public Cursor getEmpData(Integer employeeID)
        {
            EmpDept = getReadableDatabase();
           // String[] empRow = {"name", "title", "phone", "Email"};
            //String[] arg = {name, title, phone, email};
            Integer[] empRow = {employeeID};
            //Cursor c = EmpDept.query("Employee", empRow, null, null, null, null, null);
            Cursor c = EmpDept.rawQuery("Select name, Title, phone, email from Employee where EmpID like ?", new String[]{employeeID.toString()});
            if (c != null)
            {
                c.moveToFirst();
            }
            EmpDept.close();
            return c;
        }
        public Cursor getDeptName(Integer departmentID)
        {
            EmpDept = getReadableDatabase();
            Integer[] deptRow = {departmentID};
            //Cursor cr = EmpDept.rawQuery("Select name from department d inner join Employee e on d.DeptID = e.DeptID where e.name like ?",new String[]{deptartmentID.toString()});
            Cursor cr = EmpDept.rawQuery("Select name from department where DeptID like ?",new String[]{departmentID.toString()});
            if (cr != null)
            {
                cr.moveToFirst();
            }
            EmpDept.close();
            return cr;

        }
    }
}

Когда я ввожу имя и нажимаю кнопку поиска, это работает, и я получаю список имен, однакокогда я нажимаю на одно из имен, происходит сбой.

Что здесь не так?

Вот мой logcat:

11-27 04:39:48.835 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:39:48.835 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:39:58.905 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:39:58.905 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:40:08.975 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:40:08.975 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:40:09.665 704-1339/? E/Watchdog: !@Sync 6712 [11-27 04:40:09.670]
11-27 04:40:10.695 13974-13989/? E/ContactsProvider_EventLog: Flush buffer to file cnt : 1 size : 0Kb duration : 1ms lastUpdatedAfter : 60117 ms mFlush_time_threasold : 2000 mCurrentSize : 294
11-27 04:40:19.045 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:40:19.045 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:40:21.025 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.025 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.275 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.315 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.315 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.315 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.435 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.435 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.495 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.595 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.655 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.705 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.775 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.775 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.895 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:21.955 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:22.015 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:22.035 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:22.035 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:22.045 220-225/? E/Tzdaemon: [w2] pthread_setaffinity_np() failed: 22
11-27 04:40:29.095 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:712,format:0
11-27 04:40:29.095 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:712,format:0
11-27 04:40:30.465 3733-3733/? E/AffinityControl: AffinityControl: registerfunction enter
11-27 04:40:39.175 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:40:39.175 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:40:39.235 2767-2767/? E/MtpServerJNI: server is null in send_object_removed
11-27 04:40:39.665 704-1339/? E/Watchdog: !@Sync 6713 [11-27 04:40:39.672]
11-27 04:40:49.245 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:40:49.245 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:40:59.315 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:40:59.315 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:41:09.385 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:41:09.385 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:41:09.665 704-1339/? E/Watchdog: !@Sync 6714 [11-27 04:41:09.673]
11-27 04:41:10.825 13974-13989/? E/ContactsProvider_EventLog: Flush buffer to file cnt : 1 size : 0Kb duration : 2ms lastUpdatedAfter : 60131 ms mFlush_time_threasold : 2000 mCurrentSize : 294
11-27 04:41:19.465 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:41:19.465 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:41:29.535 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:41:29.535 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:41:29.775 704-876/? E/MARsDBManager: updateDBAll : begin --size 1
11-27 04:41:29.815 704-876/? E/MARsDBManager: updateDBAll : end
11-27 04:41:39.605 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:41:39.605 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:41:39.665 704-1339/? E/Watchdog: !@Sync 6715 [11-27 04:41:39.674]
11-27 04:41:49.675 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:41:49.675 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:41:59.745 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:41:59.745 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:42:09.665 704-1339/? E/Watchdog: !@Sync 6716 [11-27 04:42:09.675]
11-27 04:42:09.815 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:42:09.815 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:42:10.955 13974-13989/? E/ContactsProvider_EventLog: Flush buffer to file cnt : 1 size : 0Kb duration : 3ms lastUpdatedAfter : 60123 ms mFlush_time_threasold : 2000 mCurrentSize : 294
11-27 04:42:19.895 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:42:19.895 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:42:29.965 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:42:29.965 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:42:38.625 1547-32615/? E/Places: ?: Exceeded maximum network back off time, fetching nearby places failed with status: 7
11-27 04:42:39.665 704-1339/? E/Watchdog: !@Sync 6717 [11-27 04:42:39.676]
11-27 04:42:40.035 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:42:40.035 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:42:50.105 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:42:50.105 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:43:00.175 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:43:00.175 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:43:09.675 704-1339/? E/Watchdog: !@Sync 6718 [11-27 04:43:09.678]
11-27 04:43:10.245 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:43:10.245 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:43:11.065 13974-13989/? E/ContactsProvider_EventLog: Flush buffer to file cnt : 1 size : 0Kb duration : 1ms lastUpdatedAfter : 60110 ms mFlush_time_threasold : 2000 mCurrentSize : 294
11-27 04:43:20.315 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:43:20.315 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:43:30.395 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:43:30.395 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:43:39.675 704-1339/? E/Watchdog: !@Sync 6719 [11-27 04:43:39.679]
11-27 04:43:40.465 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:43:40.465 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:43:50.535 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:43:50.535 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:44:00.605 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:44:00.605 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:44:09.675 704-1339/? E/Watchdog: !@Sync 6720 [11-27 04:44:09.680]
11-27 04:44:10.675 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:44:10.675 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:44:11.185 13974-13989/? E/ContactsProvider_EventLog: Flush buffer to file cnt : 1 size : 0Kb duration : 1ms lastUpdatedAfter : 60116 ms mFlush_time_threasold : 2000 mCurrentSize : 294
11-27 04:44:20.745 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:44:20.745 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:44:30.815 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:44:30.815 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:44:39.675 704-1339/? E/Watchdog: !@Sync 6721 [11-27 04:44:39.681]
11-27 04:44:40.895 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:44:40.895 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:44:50.965 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:44:50.965 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:45:01.035 326-1009/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0
11-27 04:45:01.035 217-291/? E/NetlinkEvent: NetlinkEvent::decode(): buffer'change@/devices/battery/power_supply/battery' size:713,format:0

Вот мой код активности empDetails:

public class empDetails extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_emp_details);
        TextView name = (TextView)findViewById(R.id.textView7);
        TextView title = (TextView)findViewById(R.id.textView8);
        TextView phone = (TextView)findViewById(R.id.textView9);
        TextView email = (TextView)findViewById(R.id.textView10);
        TextView dept = (TextView)findViewById(R.id.textView11);
        name.setText(getIntent().getExtras().getString("empName"));
        title.setText(getIntent().getExtras().getString("empTitle"));
        phone.setText(getIntent().getExtras().getString("empPhone"));
        email.setText(getIntent().getExtras().getString("empEmail"));
        dept.setText(getIntent().getExtras().getString("empDept"));

    }
}

Когда я отлаживаю, секция отладчика ничего не показывает, часть секции консоли показывает это:

    --------- beginning of crash
E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.fatma.assgnment004, PID: 2580
    java.lang.IllegalStateException: Cannot perform this operation because the connection pool has been closed.
        at android.database.sqlite.SQLiteConnectionPool.throwIfClosedLocked(SQLiteConnectionPool.java:962)
        at android.database.sqlite.SQLiteConnectionPool.waitForConnection(SQLiteConnectionPool.java:599)
        at android.database.sqlite.SQLiteConnectionPool.acquireConnection(SQLiteConnectionPool.java:348)
        at android.database.sqlite.SQLiteSession.acquireConnection(SQLiteSession.java:894)
        at android.database.sqlite.SQLiteSession.executeForCursorWindow(SQLiteSession.java:834)
        at android.database.sqlite.SQLiteQuery.fillWindow(SQLiteQuery.java:62)
        at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:143)
        at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:132)
        at android.database.AbstractCursor.moveToPosition(AbstractCursor.java:219)
        at android.database.AbstractCursor.moveToFirst(AbstractCursor.java:258)
        at com.example.fatma.assgnment004.MainActivity$DeptDPHelper.getEmpID(MainActivity.java:182)
        at com.example.fatma.assgnment004.MainActivity$2.onItemClick(MainActivity.java:77)
        at android.widget.AdapterView.performItemClick(AdapterView.java:310)
        at android.widget.AbsListView.performItemClick(AbsListView.java:1156)
        at android.widget.AbsListView$PerformClick.run(AbsListView.java:3121)
        at android.widget.AbsListView.onTouchUp(AbsListView.java:4048)
        at android.widget.AbsListView.onTouchEvent(AbsListView.java:3807)
        at android.view.View.dispatchTouchEvent(View.java:10023)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2626)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2307)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
        at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
        at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
        at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:413)
        at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1808)
        at android.app.Activity.dispatchTouchEvent(Activity.java:3061)
        at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:375)
        at android.view.View.dispatchPointerEvent(View.java:10243)
        at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4438)
        at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4306)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3853)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3906)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3872)
        at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3999)
        at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3880)
        at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4056)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3853)
        at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3906)
        at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3872)
        at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3880)
        at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3853)
        at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6246)
        at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6220)
        at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6181)
        at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6349)
E/AndroidRuntime:     at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
        at android.os.MessageQueue.nativePollOnce(Native Method)
        at android.os.MessageQueue.next(MessageQueue.java:323)
        at android.os.Looper.loop(Looper.java:136)
        at android.app.ActivityThread.main(ActivityThread.java:6119)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Disconnected from the target VM, address: 'localhost:8647', transport: 'socket'

Answer 1

Отредактировано

В трассировке стека, добавленной к вопросу, есть строка с надписью

java.lang.IllegalStateException: Cannot perform this operation because the connection pool has been closed.

Это говоритчто соединение (так как может быть число, следовательно, пул соединений) было закрыто.Соединение, являющееся соединением (ями) с базой данных.Он закрыт, потому что вы специально закрыли его, используя EmpDept.close().

Когда создается курсор, он фактически не содержит данных, скорее он считывает данные из базы данных, когда эти данные необходимы.Если база данных была закрыта, то она не может получить данные.

например, у вас есть: -

        cur.moveToFirst();
        EmpDept.close(); //<<<<<<<<<< Database connection closed
        return cur;

Короче говоря, вы не можете закрыть соединение с базой данных и затем получить доступ к данным в курсоре.

Вот полное рабочее решение, которое не включает вышеуказанный недостаток и другие недостатки (некоторые обозначены комментариями).

Сначала новый класс с именем Employee в Employee.java

public class Employee {

    private long employeeId;
    private String employeeName;
    private String employeeTitle;
    private String employeePhone;
    private String employeeEmail;
    private long employeeDeptId;
    private String employeeDeptName;

    public Employee(
            long id,
            String name,
            String title,
            String phone,
            String email,
            long deptid,
            String deptname
    ) {
        this.employeeId = id;
        this.employeeName = name;
        this.employeeTitle = title;
        this.employeePhone = phone;
        this.employeeEmail = email;
        this.employeeDeptId = deptid;
        this.employeeDeptName = deptname;
    }

    public Employee() {
        this(-1L,"","","","",-1L,"");
    }

    public Employee(String name, String title, String phone, String email) {
        this(-1L,name,title,phone,email,-1L,"");
    }

    public long getEmployeeId() {
        return employeeId;
    }

    public void setEmployeeId(long employeeId) {
        this.employeeId = employeeId;
    }

    public String getEmployeeName() {
        return employeeName;
    }

    public void setEmployeeName(String employeeName) {
        this.employeeName = employeeName;
    }

    public String getEmployeeTitle() {
        return employeeTitle;
    }

    public void setEmployeeTitle(String employeeTitle) {
        this.employeeTitle = employeeTitle;
    }

    public String getEmployeePhone() {
        return employeePhone;
    }

    public void setEmployeePhone(String employeePhone) {
        this.employeePhone = employeePhone;
    }

    public String getEmployeeEmail() {
        return employeeEmail;
    }

    public void setEmployeeEmail(String employeeEmail) {
        this.employeeEmail = employeeEmail;
    }

    public long getEmployeeDeptId() {
        return employeeDeptId;
    }

    public void setEmployeeDeptId(long employeeDeptId) {
        this.employeeDeptId = employeeDeptId;
    }

    public String getEmployeeDeptName() {
        return employeeDeptName;
    }

    public void setEmployeeDeptName(String employeeDeptName) {
        this.employeeDeptName = employeeDeptName;
    }

    public boolean ifFullyUseableEmployee() {
         return this.employeeId < 1 || this.employeeDeptId < 1 || this.employeeDeptName.length() < 1;
    }

    @Override
    public String toString() {
        return this.employeeTitle + " " + this.employeeName;
    }
}

Возможно, новый класс для DatabaseHelper, а именно DeptDPhelper.java

public class DeptDPHelper extends SQLiteOpenHelper {

    SQLiteDatabase EmpDept;

    //<<<<<<<<<< BAD PRACTICE TO HARD CODE TABLE AND COLUMN NAMES THROUGHOUT >>>>>>>>>>
    //<<<<<<<<<< INSTEAD USE CONSTANTS                                       >>>>>>>>>>>

    public static final String DBNAME = "EmpDept";
    public static final int DBVERSION = 2;
    public static final String DEPARTMENT_TABLE = "department";
    public static final String EMPLOYEE_TABLE = "employee"; //<<<<<<<<<< not Employee to be consistent with naming connvention

    public static final String DEPARTMENT_DEPTID_COLUMN = "departmenttid";
    public static final String DEPARTMENT_NAME_COLUMN = "departmentname";

    public static final String EMPLOYEE_EMPID_COLUMN = "employeeid";
    public static final String EMPLOYEE_NAME_COLUMN = "employeename";
    public static final String EMPLOYEE_TITLE_COLUMN= "employeetitle";
    public static final String EMPLOYEE_PHONE_COLUMN = "employeephone";
    public static final String EMPLOYEE_EMAIL_COLUMN = "employeeemail";
    public static final String EMPLOYEE_DEPT_COLUMN = "employeeedepartmentid";

    public DeptDPHelper(Context context) {
        super(context, DBNAME, null, DBVERSION);
        EmpDept = this.getWritableDatabase();
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        String crt_dept_table_sql = "CREATE TABLE IF NOT EXISTS " + DEPARTMENT_TABLE + "(" +
                DEPARTMENT_DEPTID_COLUMN + " INTEGER PRIMARY KEY, " + //<<<<<<<<<< AUTOINCREMENT INEFFICIENT NOT NEEDED
                DEPARTMENT_NAME_COLUMN + " TEXT" +
                ")";
        db.execSQL(crt_dept_table_sql);

        String crt_employee_table_sql = "CREATE TABLE IF NOT EXISTS " + EMPLOYEE_TABLE + "(" +
                EMPLOYEE_EMPID_COLUMN + " INTEGER PRIMARY KEY, " +
                EMPLOYEE_NAME_COLUMN + " TEXT NOT NULL, " +
                EMPLOYEE_TITLE_COLUMN + " TEXT NOT NULL, " +
                EMPLOYEE_PHONE_COLUMN + " TEXT NOT NULL, " +
                EMPLOYEE_EMAIL_COLUMN + " TEXT NOT NULL, " +
                EMPLOYEE_DEPT_COLUMN + " INTEGER REFERENCES " + DEPARTMENT_TABLE + "(" +
                DEPARTMENT_DEPTID_COLUMN +
                ")" +
                ")";
        db.execSQL(crt_employee_table_sql);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

        //<<<<<<<<<< IF USING FOREIGN KEYS AND SUPPORT IS ON THEN CANNOT DELETE PARENT TABLE FIRST >>>>>>>>>>
        //<<<<<<<<<< AS SUCH DEPARTMENT TABLE MUST BE DROPPED FIRST OTHEWISE THERE WILL BE CONFLICTS >>>>>>>>>>
        db.execSQL("DROp TABLE IF EXISTS " + EMPLOYEE_TABLE);
        db.execSQL("DROP TABLE IF EXISTS " + DEPARTMENT_TABLE);
        onCreate(db);
    }

    //<<<<<<<<<< FOREIGN KEY SUPPORT IS TUREND OFF BY DEFAULT SO TURN THEM ON >>>>>>>>>>
    //<<<<<<<<<< IF NOT USELESS CODING FOREIGN KEYS                           >>>>>>>>>>
    @Override
    public void onConfigure(SQLiteDatabase db) {
        db.setForeignKeyConstraintsEnabled(true);
        super.onConfigure(db);
    }

    public long insertEmployee(String name, String title, String phone, String email, long deptid) {
        //<<<<<<<<<< optional check if deptid references a deptartment >>>>>>>>>>
        //<<<<<<<<<< however INSERT OR IGNORE doesn't ignore FK conflicts >>>>>>>>>>
        if (!ifDepertmentExists(deptid)) return -1;

        ContentValues cv = new ContentValues();
        cv.put(EMPLOYEE_NAME_COLUMN,name);
        cv.put(EMPLOYEE_TITLE_COLUMN,title);
        cv.put(EMPLOYEE_PHONE_COLUMN,phone);
        cv.put(EMPLOYEE_EMAIL_COLUMN,email);
        cv.put(EMPLOYEE_DEPT_COLUMN,deptid);
        return EmpDept.insert(EMPLOYEE_TABLE,name,cv);
    }

    public long insertDepartment(String name) {
        ContentValues cv = new ContentValues();
        cv.put(DEPARTMENT_NAME_COLUMN,name);
        return EmpDept.insert(DEPARTMENT_TABLE,null,cv);
    }

    public Cursor selectLikeEmployeesByNamePart(String namepart) {
        String[] columns = new String[]{EMPLOYEE_NAME_COLUMN};
        String whereclause = EMPLOYEE_NAME_COLUMN + "LIKE ?";
        String[] whereargs = new String[] {"%" + namepart +"%"};
        return EmpDept.query(EMPLOYEE_TABLE,columns,whereclause,whereargs,null,null,EMPLOYEE_NAME_COLUMN);
    }

    public ArrayList<Employee> getAllEmployees(String namepart) {
        ArrayList<Employee> employees = new ArrayList<>();
        String whereclause = null;
        String[] wherargs = null;
        if (namepart != null && namepart.length() > 0) {
            whereclause = EMPLOYEE_NAME_COLUMN + " LIKE ?";
            wherargs = new String[]{"%" + namepart + "%"};
        }
        Cursor csr = EmpDept.query(EMPLOYEE_TABLE + " JOIN " + DEPARTMENT_TABLE + " ON " + EMPLOYEE_DEPT_COLUMN + "=" + DEPARTMENT_DEPTID_COLUMN,
                    null,whereclause, wherargs, null, null, EMPLOYEE_NAME_COLUMN + "," + EMPLOYEE_DEPT_COLUMN);
        while (csr.moveToNext()) {
            employees.add( new Employee(
                    csr.getLong(csr.getColumnIndex(EMPLOYEE_EMPID_COLUMN)),
                    csr.getString(csr.getColumnIndex(EMPLOYEE_NAME_COLUMN)),
                    csr.getString(csr.getColumnIndex(EMPLOYEE_TITLE_COLUMN)),
                    csr.getString(csr.getColumnIndex(EMPLOYEE_PHONE_COLUMN)),
                    csr.getString(csr.getColumnIndex(EMPLOYEE_EMAIL_COLUMN)),
                    csr.getLong(csr.getColumnIndex(DEPARTMENT_DEPTID_COLUMN)),
                    csr.getString(csr.getColumnIndex(DEPARTMENT_NAME_COLUMN)))
            );
        }
        csr.close();
        return employees;
    }


    private boolean ifDepertmentExists(long deptid) {
        String wherecluase = DEPARTMENT_DEPTID_COLUMN + "=?";
        String[] whereargs = new String[]{String.valueOf(deptid)};
        Cursor csr =EmpDept.query(DEPARTMENT_TABLE,null,wherecluase,whereargs,null,null,null);
        int rowcount = csr.getCount();
        csr.close();
        return rowcount > 0;
    }
}

• Некоторые комментарии были добавлены, что должно объяснить некоторые вещи.

Активность empDetails, а именно empDetails.java

public class empDetails extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_emp_details);
        TextView name = (TextView)findViewById(R.id.textview7);
        TextView title = (TextView)findViewById(R.id.textview8);
        TextView phone = (TextView)findViewById(R.id.textview9);
        TextView email = (TextView)findViewById(R.id.textview10);
        TextView dept = (TextView)findViewById(R.id.textview11);
        Button mDoneButton = this.findViewById(R.id.donebutton);
        mDoneButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                finish();
            }
        });
        name.setText(getIntent().getExtras().getString(DeptDPHelper.EMPLOYEE_NAME_COLUMN));
        title.setText(getIntent().getExtras().getString(DeptDPHelper.EMPLOYEE_TITLE_COLUMN));
        phone.setText(getIntent().getExtras().getString(DeptDPHelper.EMPLOYEE_PHONE_COLUMN));
        email.setText(getIntent().getExtras().getString(DeptDPHelper.EMPLOYEE_EMAIL_COLUMN));
        dept.setText(getIntent().getExtras().getString(DeptDPHelper.DEPARTMENT_NAME_COLUMN));
    }
}

И наконец MainActivity.java

public class MainActivity extends AppCompatActivity {

    DeptDPHelper mDBHlpr;
    ArrayList<Employee> mEmployeeList;
    ArrayAdapter mNameAdapter;
    ListView namelist;
    EditText mNamePart;
    TextWatcher mTW;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        namelist = this.findViewById(R.id.namelist);
        mNamePart = this.findViewById(R.id.searchbar);
        mDBHlpr = new DeptDPHelper(this);
        addSomeData();
        setupOrRefreshNameList();
        setupSearch();
    }

    private void setupOrRefreshNameList() {
        String namepart = mNamePart.getText().toString();
        if (namepart.length() < 1) namepart = null;
        if (mEmployeeList != null) {
            mEmployeeList.clear();
            ArrayList<Employee> el = mDBHlpr.getAllEmployees(namepart);
            mEmployeeList.addAll(el);
        } else {
            mEmployeeList = mDBHlpr.getAllEmployees(namepart);
        }
        if (mNameAdapter == null) {
            mNameAdapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1,mEmployeeList);
            namelist.setAdapter(mNameAdapter);
            setupListViewListeners();
        } else {
            mNameAdapter.notifyDataSetChanged();
        }
    }

    //<<<<<<<<<< For testing >>>>>>>>>>
    private void addSomeData() {
        long dept1 = mDBHlpr.insertDepartment("Dept001");
        long dept2 = mDBHlpr.insertDepartment("Dept002");

        mDBHlpr.insertEmployee("Fred","Mr.","1234567890","fred.x.com",dept1);
        mDBHlpr.insertEmployee("Fred","Mr.","0987654321","fred@z.com",dept2);
        mDBHlpr.insertEmployee("Mary","Ms.","9999999999","mary@marymail.net",dept1);
        mDBHlpr.insertEmployee("Albert","Sir ", "1113334445","lord@roayls.org",dept1);
    }

    private void setupListViewListeners() {
        namelist.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Employee e = (Employee) mNameAdapter.getItem(i);
                Toast.makeText(
                        getApplicationContext(),
                        "You clicked on " +
                                e.getEmployeeTitle() + " " +
                                e.getEmployeeName() +
                                " ID=" + String.valueOf(e.getEmployeeId()) +
                                " Email=" + e.getEmployeeEmail() +
                                " Phone=" + e.getEmployeePhone() +
                                " Dept=" + e.getEmployeeDeptName()
                        ,
                        Toast.LENGTH_SHORT)
                        .show();
                Intent intent = new Intent(MainActivity.this,empDetails.class);
                intent.putExtra(DeptDPHelper.EMPLOYEE_NAME_COLUMN,e.getEmployeeName());
                intent.putExtra(DeptDPHelper.EMPLOYEE_EMPID_COLUMN,e.getEmployeeId());
                intent.putExtra(DeptDPHelper.EMPLOYEE_TITLE_COLUMN,e.getEmployeeTitle());
                intent.putExtra(DeptDPHelper.EMPLOYEE_PHONE_COLUMN,e.getEmployeePhone());
                intent.putExtra(DeptDPHelper.EMPLOYEE_EMAIL_COLUMN,e.getEmployeeEmail());
                intent.putExtra(DeptDPHelper.DEPARTMENT_NAME_COLUMN,e.getEmployeeDeptName());
                startActivity(intent);
            }
        });
    }

    private void setupSearch() {
        mTW = new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            //<<<<<<<<<< Every time the text is changed refresh the ListView >>>>>>>>>>
            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                setupOrRefreshNameList();
            }

            @Override
            public void afterTextChanged(Editable editable) {

            }
        };
        mNamePart.addTextChangedListener(mTW);
    }
}

• Обратите внимание, что это динамически изменяет список при вводе текста в EditText

• Обратите внимание, что Mainifest включает в себя <activity android:name=".empDetails"></activity>

При первом запуске вы получаете: -

Ввод A fили пример (примечание относится только к имени, а не к заглавной части): -

Нажатие на Мэри: -

Готово вернется к MainActivity.