调用意图时出现Android Studio运行时错误

当调用intent时，在调用intent的

super.onCreate（Bundle）

之前，我从一个活动转到另一个活动时遇到运行时错误。我记得有过类似的问题，但我不记得解决方法是什么，我是如何解决的。以下是两项活动：

package com.erikstagg.tempo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;


public class register extends Activity {


    private EditText txtFname;
    private EditText txtLname;
    private EditText txtEmail;
    private EditText txtPhone;
    private Button btnNext;
    private TextView lblWarning;

    public static String Fname;
    public static String Lname;
    public static String email;
    public static String phone;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.register);

        txtFname = (EditText)findViewById((R.id.txtFname));
        txtLname = (EditText)findViewById((R.id.txtLname));
        txtEmail = (EditText)findViewById((R.id.txtEmail));
        txtPhone = (EditText)findViewById((R.id.txtPhone));
        lblWarning = (TextView)findViewById(R.id.lblWarning);
        txtFname.addTextChangedListener(watcher);
        txtLname.addTextChangedListener(watcher);
        txtEmail.addTextChangedListener(watcher);
        txtPhone.addTextChangedListener(watcher);
        btnNext = (Button)findViewById(R.id.btnNext);
        btnNext.setEnabled(false);

        txtFname.setText(Fname);
        txtLname.setText(Lname);
        txtEmail.setText(email);
        txtPhone.setText(phone);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_register, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    private final TextWatcher watcher = new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after)
        { }
        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count)
        {}
        @Override
        public void afterTextChanged(Editable s) {
            if (txtFname.getText().toString().trim().length() == 0 ||
                    txtLname.getText().toString().trim().length() == 0 ||
                    txtEmail.getText().toString().trim().length() == 0 ||
                    txtPhone.getText().toString().trim().length() == 0) {
                btnNext.setEnabled(false);
                lblWarning.setVisibility(View.VISIBLE);
            } else {
                btnNext.setEnabled(true);
                lblWarning.setVisibility(View.INVISIBLE);
            }
        }
    };

    public void btnClicked(View v) {

        Fname = txtFname.getText().toString();
        Lname = txtLname.getText().toString();
        email = txtEmail.getText().toString();
        phone = txtPhone.getText().toString();

        switch(v.getId()){
            case R.id.btnBack:
                Intent intentBack = new Intent(this, login.class);
                startActivity(intentBack);
                break;
            case R.id.btnNext:
                Intent intentNext = new Intent(this, register2.class);
                startActivity(intentNext);
                break;
            default:
                break;
        }
    }
}

此活动称为：

package com.erikstagg.tempo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;

import java.util.Arrays;


public class register2 extends Activity implements AdapterView.OnItemSelectedListener {

    private Spinner listBMonth;
    private ArrayAdapter<CharSequence> bMonthAdapter = ArrayAdapter.createFromResource(this, R.array.months, android.R.layout.simple_spinner_item);
    private Spinner listBDay;
    private ArrayAdapter<CharSequence> bDayAdapter = ArrayAdapter.createFromResource(this, R.array.days31, android.R.layout.simple_spinner_item);
    private Spinner listBYear;
    private ArrayAdapter<CharSequence> bYearAdapter = ArrayAdapter.createFromResource(this, R.array.years, android.R.layout.simple_spinner_item);

    private Spinner listCountry;
    private ArrayAdapter<CharSequence> countryAdapter = ArrayAdapter.createFromResource(this, R.array.countries, android.R.layout.simple_spinner_item);
    private Spinner listState;
    private ArrayAdapter<CharSequence> stateAdapter = ArrayAdapter.createFromResource(this, R.array.states, android.R.layout.simple_spinner_item);

    private EditText txtAddress;
    private EditText txtCity;
    private EditText txtZip;
    private Button btnNext;
    private TextView lblWarning;

    private int bMonthPos = -1;
    private int bDayPos = -1;
    private int bYearPos = -1;
    private int countryPos = -1;
    private int statePos = -1;
    public static String bDate;
    public static String country;
    public static String state;
    public static String address;
    public static String city;
    public static String zip;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.register2);

        listBMonth = (Spinner)findViewById((R.id.listMonth));
        listBDay = (Spinner)findViewById((R.id.listDay));
        listBYear = (Spinner)findViewById((R.id.listYear));
        listCountry = (Spinner)findViewById((R.id.listCountry));
        listState = (Spinner)findViewById((R.id.listState));
        txtCity = (EditText)findViewById((R.id.txtCity));
        txtZip = (EditText)findViewById((R.id.txtZip));
        txtAddress = (EditText)findViewById((R.id.txtAddress));
        lblWarning = (TextView)findViewById(R.id.lblWarning);
        txtAddress.addTextChangedListener(watcher);
        txtCity.addTextChangedListener(watcher);
        txtZip.addTextChangedListener(watcher);
        btnNext = (Button)findViewById(R.id.btnNext);
        btnNext.setEnabled(false);

        bMonthAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        listBMonth.setAdapter(bMonthAdapter);
        bDayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        listBDay.setAdapter(bDayAdapter);
        bYearAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        listBYear.setAdapter(bYearAdapter);
        countryAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        listCountry.setAdapter(countryAdapter);
        stateAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        listState.setAdapter(stateAdapter);

        listBMonth.setOnItemSelectedListener(this);
        listBDay.setOnItemSelectedListener(this);
        listBYear.setOnItemSelectedListener(this);
        listCountry.setOnItemSelectedListener(this);
        listState.setOnItemSelectedListener(this);

        if (bMonthPos != -1){
            listBMonth.setSelection(bMonthPos);
        }
        if (bDayPos != -1){
            listBDay.setSelection(bDayPos);
        }
        if (bYearPos != -1){
            listBYear.setSelection(bYearPos);
        }
        if (countryPos != -1){
            listBYear.setSelection(bYearPos);
        }
        if (statePos != -1){
            listBYear.setSelection(bYearPos);
        }
        txtAddress.setText(address);
        txtCity.setText(city);
        txtZip.setText(zip);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_register2, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    private final TextWatcher watcher = new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after)
        { }
        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count)
        {}
        @Override
        public void afterTextChanged(Editable s) {
            checkIfFormCompleted();
        }
    };

    private void checkIfFormCompleted(){
        if (bMonthPos == -1 ||
                bDayPos == -1 ||
                bYearPos == -1 ||
                countryPos == -1 ||
                statePos == -1 ||
                txtAddress.getText().toString().trim().length() == 0 ||
                txtCity.getText().toString().trim().length() == 0 ||
                txtZip.getText().toString().trim().length() == 0) {
            btnNext.setEnabled(false);
            lblWarning.setVisibility(View.VISIBLE);
        } else {
            btnNext.setEnabled(true);
            lblWarning.setVisibility(View.INVISIBLE);
        }
    }

    public void onItemSelected(AdapterView<?> parent, View view, int position, long id)  {

        checkIfFormCompleted();
        bMonthPos = listBMonth.getSelectedItemPosition();
        bDayPos = listBDay.getSelectedItemPosition();
        bYearPos = listBYear.getSelectedItemPosition();
        countryPos = listCountry.getSelectedItemPosition();
        statePos = listState.getSelectedItemPosition();

        int[] months31 = {0, 2, 4, 6 , 7,9 , 11};
        int[] months30 = {3, 5, 8, 10};
        int[] months29 = {1};

        if (Arrays.asList(months31).contains(bMonthPos)){
            bDayAdapter.clear();
            bDayAdapter.addAll(getResources().getStringArray(R.array.days31));
            listBDay.setAdapter(bDayAdapter);
        }else if (Arrays.asList(months30).contains(bMonthPos)) {
            bDayAdapter.clear();
            bDayAdapter.addAll(getResources().getStringArray(R.array.days30));
            listBDay.setAdapter(bDayAdapter);
        }else if (Arrays.asList(months29).contains(bMonthPos)) {
            bDayAdapter.clear();
            bDayAdapter.addAll(getResources().getStringArray(R.array.days29));
            listBDay.setAdapter(bDayAdapter);
        }
    }

    // required function for "implements AdapterView.OnItemSelectedListener"
    public void onNothingSelected(AdapterView<?> parent) {
        // do nothing
    }

    public void btnClicked(View v) {

        bDate = listBMonth.getSelectedItem() + " - "
                + listBMonth.getSelectedItem() + " - "
                + listBMonth.getSelectedItem();
        country = getResources().getStringArray(R.array.countries)[countryPos];
        state = getResources().getStringArray(R.array.states)[statePos];
        address = txtAddress.getText().toString();
        city = txtCity.getText().toString();
        zip = txtZip.getText().toString();

        switch(v.getId()){
            case R.id.btnBack:
                Intent intentBack = new Intent(this, register.class);
                startActivity(intentBack);
                break;
            case R.id.btnNext:
                Intent intentNext = new Intent(this, register3.class);
                startActivity(intentNext);
                break;
            default:
                break;
        }
    }
}

package com.erikstagg.tempo；
导入android.app.Activity；
导入android.content.Intent；
导入android.os.Bundle；
导入android.text.Editable；
导入android.text.TextWatcher；
导入android.view.Menu；
导入android.view.MenuItem；
导入android.view.view；
导入android.widget.AdapterView；
导入android.widget.ArrayAdapter；
导入android.widget.Button；
导入android.widget.EditText；
导入android.widget.Spinner；
导入android.widget.TextView；
导入java.util.array；
公共类register2扩展活动实现AdapterView.OnItemSelectedListener{
私人微调器列表b月；
private ArrayAdapter bMonthAdapter=ArrayAdapter.createFromResource（这个，R.array.months，android.R.layout.simple\u微调器\u项）；
私人微调器列表日期；
private ArrayAdapter bDayAdapter=ArrayAdapter.createFromResource（这个，R.array.days31，android.R.layout.simple\u微调器\u项）；
私人纺纱机；
私有ArrayAdapter bYearAdapter=ArrayAdapter.createFromResource（这个，R.array.years，android.R.layout.simple\u微调器\u项）；
私人纺纱厂；
private ArrayAdapter countryAdapter=ArrayAdapter.createFromResource（这个，R.array.countries，android.R.layout.simple\u微调器\u项）；
私有微调器状态；
private ArrayAdapter stateAdapter=ArrayAdapter.createFromResource（这个，R.array.states，android.R.layout.simple\u微调器\u项）；
私有编辑文本txtAddress；
私人编辑城市；
私有编辑文本txtZip；
私人按钮btnNext；
私有文本视图lblWarning；
私有整数bmmonthpos=-1；
私有int bDayPos=-1；
私有int bYearPos=-1；
私有int countryPos=-1；
私有int statePos=-1；
公共静态字符串bDate；
公共静态字符串国家；
公共静态字符串状态；
公共静态字符串地址；
公共静态字符串城市；
公共静态字符串压缩；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.register2）；
listBMonth=（微调器）findViewById（（R.id.listMonth））；
listBDay=（微调器）findViewById（（R.id.listDay））；
listBYear=（微调器）findViewById（（R.id.listYear））；
listCountry=（微调器）findViewById（（R.id.listCountry））；
listState=（微调器）findViewById（（R.id.listState））；
txtCity=（EditText）findViewById（（R.id.txtCity））；
txtZip=（EditText）findViewById（（R.id.txtZip））；
txtAddress=（EditText）findViewById（（R.id.txtAddress））；
lblWarning=（TextView）findViewById（R.id.lblWarning）；
txtAddress.addTextChangedListener（观察者）；
addTextChangedListener（观察者）；
addTextChangedListener（观察者）；
btnNext=（按钮）findViewById（R.id.btnNext）；
btnNext.setEnabled（false）；
b monthAdapter.setDropDownViewResource（android.R.layout.simple\u微调器\u下拉项）；
listBMonth.setAdapter（bmmonthadapter）；
bDayAdapter.setDropDownViewResource（android.R.layout.simple\u微调器\u下拉菜单\u项）；
setAdapter（bDayAdapter）；
bYearAdapter.setDropDownViewResource（android.R.layout.simple\u微调器\u下拉菜单\u项）；
setAdapter（bYearAdapter）；
countryAdapter.setDropDownViewResource（android.R.layout.simple\u微调器\u下拉菜单\u项）；
setAdapter（countryAdapter）；
stateAdapter.setDropDownViewResource（android.R.layout.simple\u微调器\u下拉菜单\u项）；
setAdapter（stateAdapter）；
listBMonth.setOnItemSelectedListener（此）；
setOnItemSelectedListener（此）；
setOnItemSelectedListener（此）；
listCountry.setOnItemSelectedListener（此）；
setOnItemSelectedListener（此）；
如果（b月数！=-1）{
listBMonth.setSelection（bmmonthpos）；
}
如果（bDayPos！=-1）{
listBDay.setSelection（bDayPos）；
}
如果（bYearPos！=-1）{
listBYear.setSelection（bYearPos）；
}
如果（countryPos！=-1）{
listBYear.setSelection（bYearPos）；
}
如果（statePos！=-1）{
listBYear.setSelection（bYearPos）；
}
txtAddress.setText（地址）；
txtCity.setText（城市）；
setText（zip）；
}
@凌驾
公共布尔onCreateOptions菜单（菜单）{
//为菜单充气；这会将项目添加到操作栏（如果存在）。
getMenuInflater（）.充气（R.menu.menu\u寄存器2，菜单）；
返回true；
}
@凌驾
公共布尔值onOptionsItemSelected（菜单项项）{
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击，只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId（）；
//noinspection SimplifiableIf语句
if（id==R.id.action\u设置）{
返回true；
}
返回super.onOptionsItemSelected（项目）；
}
私有最终TextWatcher watcher=新TextWatcher（）{
@凌驾
更改前文本之前的公共void（字符序列s、int start、int count、int after）
{ }
@凌驾
public void onTextChanged（字符序列、int start、int before、int count）
{}
@凌驾
公共无效后文本已更改（可编辑）{
checkIfFormCompleted（）；
}
};
私有无效检查已完成（）{
如果（b个月位置==-1||
bDayPos==-1||
bYearPos==-1||
有限公司
04-30 10:09:52.421    4742-4742/com.erikstagg.tempo E/Zygote﹕ MountEmulatedStorage() 04-30 10:09:52.421    4742-4742/com.erikstagg.tempo E/Zygote﹕ v2 04-30 10:09:52.421    4742-4742/com.erikstagg.tempo E/SELinux﹕ [DEBUG] get_category: variable seinfo: default sensitivity: NULL, cateogry: NULL 04-30 10:12:38.981    4742-4742/com.erikstagg.tempo E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.erikstagg.tempo, PID: 4742
    java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.erikstagg.tempo/com.erikstagg.tempo.register2}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2641)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2855)
            at android.app.ActivityThread.access$900(ActivityThread.java:181)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1474)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:145)
            at android.app.ActivityThread.main(ActivityThread.java:6117)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
            at android.content.ContextWrapper.getResources(ContextWrapper.java:90)
            at android.view.ContextThemeWrapper.getResources(ContextThemeWrapper.java:74)
            at android.widget.ArrayAdapter.createFromResource(ArrayAdapter.java:430)
            at com.erikstagg.tempo.register2.<init>(register2.java:24)
            at java.lang.reflect.Constructor.newInstance(Native Method)
            at java.lang.Class.newInstance(Class.java:1650)
            at android.app.Instrumentation.newActivity(Instrumentation.java:1079)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2631)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2855)
            at android.app.ActivityThread.access$900(ActivityThread.java:181)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1474)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:145)
            at android.app.ActivityThread.main(ActivityThread.java:6117)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_alignParentTop="false"
        android:layout_alignParentStart="true">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="Account"
            android:id="@+id/register1textView"
            android:layout_gravity="center_horizontal"
            android:paddingBottom="50dp" />

        <EditText
            android:layout_width="230dp"
            android:layout_height="wrap_content"
            android:id="@+id/txtFname"
            android:layout_gravity="center_horizontal"
            android:hint="First Name"
            android:gravity="center"/>

        <EditText
            android:layout_width="230dp"
            android:layout_height="wrap_content"
            android:id="@+id/txtLname"
            android:layout_gravity="center_horizontal"
            android:hint="Last Name"
            android:gravity="center" />

        <EditText
            android:layout_width="230dp"
            android:layout_height="wrap_content"
            android:id="@+id/txtEmail"
            android:layout_gravity="center_horizontal"
            android:hint="Email"
            android:gravity="center" />

        <EditText
            android:layout_width="230dp"
            android:layout_height="wrap_content"
            android:id="@+id/txtPhone"
            android:layout_gravity="center_horizontal"
            android:hint="Phone Number"
            android:gravity="center" />

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Please fill out all fields!"
                android:id="@+id/lblWarning"
                android:gravity="center"
                android:enabled="false"
                android:visibility="invisible" />
        </LinearLayout>

    </LinearLayout>

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_weight=".5"
        android:gravity="bottom"
        android:layout_alignParentBottom="true">

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Back"
            android:id="@+id/btnBack"
            android:onClick="btnClicked"
            android:layout_weight="1" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Next"
            android:id="@+id/btnNext"
            android:onClick="btnClicked"
            android:layout_weight="1" />
    </LinearLayout>

</RelativeLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_alignParentStart="true"
        android:layout_weight="1"
        android:id="@+id/linearLayout"
        android:gravity="top|bottom">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="Profile Details"
            android:id="@+id/register1textView"
            android:layout_gravity="center_horizontal"
            android:paddingBottom="50dp" />

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceSmall"
                android:text="Birthdate"
                android:id="@+id/textView2" />

            <Spinner
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/listMonth"
                android:layout_weight="1"/>

            <Spinner
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/listDay"
                android:layout_weight="1"/>

            <Spinner
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/listYear"
                android:layout_weight="1"/>
        </LinearLayout>

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceSmall"
                android:text="Country"
                android:id="@+id/lblCountry" />

            <Spinner
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/listCountry"
                android:layout_weight="1"/>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceSmall"
                android:text="State"
                android:id="@+id/lblState" />

            <Spinner
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/listState"
                android:layout_weight="1"/>
        </LinearLayout>

        <EditText
            android:layout_width="230dp"
            android:layout_height="wrap_content"
            android:id="@+id/txtAddress"
            android:layout_gravity="center_horizontal"
            android:hint="Address"
            android:gravity="center" />

        <EditText
            android:layout_width="230dp"
            android:layout_height="wrap_content"
            android:id="@+id/txtCity"
            android:layout_gravity="center_horizontal"
            android:hint="City"
            android:gravity="center" />

        <EditText
            android:layout_width="230dp"
            android:layout_height="wrap_content"
            android:id="@+id/txtZip"
            android:layout_gravity="center_horizontal"
            android:hint="Zip/Postal"
            android:gravity="center" />

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Please fill out all fields!"
                android:id="@+id/lblWarning"
                android:gravity="center"
                android:enabled="false"
                android:visibility="invisible" />
        </LinearLayout>

    </LinearLayout>

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_weight=".5"
        android:gravity="bottom"
        android:layout_alignParentBottom="true">

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Back"
            android:id="@+id/btnBack"
            android:onClick="btnClicked"
            android:layout_weight="1" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Next"
            android:id="@+id/btnNext"
            android:onClick="btnClicked"
            android:layout_weight="1" />
    </LinearLayout>
</RelativeLayout>

private ArrayAdapter<CharSequence> bMonthAdapter = ArrayAdapter.createFromResource(this, R.array.months, android.R.layout.simple_spinner_item);