App Crash: FATAL EXCEPTION: main - android-studio

Question

App Crash on button click. Here is the log.
Dealing specifically with trying to store a user into Parse.com as my backend. I have a java class called RegisterActivity with corresponding xml file, leading me to think it could be a null pointer exception, but I tested, and that doesnt seem to be the problem. Here are the 3 classes in which I believe are involved with the problem.
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.parse.ParseException;
import com.parse.ParseUser;
import com.parse.SignUpCallback;
public class RegisterActivity extends Activity {
protected EditText mUsername;
protected EditText mUserEmail;
protected EditText mUserPassword;
protected Button mRegisterButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
//initialize
mUsername = (EditText)findViewById(R.id.usernameRegisterEditText);
mUserEmail= (EditText)findViewById(R.id.emailRegisterEditText);
mUserPassword= (EditText)findViewById(R.id.passwordRegisterEditText);
mRegisterButton = (Button)findViewById(registerButton);
//listen to register button click
mRegisterButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//get the username,password, and email, then convert to string
String username = mUsername.getText().toString().trim();
String email = mUserEmail.getText().toString().trim();
String password = mUserPassword.getText().toString().trim();
//store user and parse
ParseUser user = new ParseUser();
user.setUsername(username);
user.setPassword(email);
user.setEmail(password);
user.signUpInBackground(new SignUpCallback() {
#Override
public void done(ParseException e) {
if(e == null){
//user signed up successfully
Toast.makeText(RegisterActivity.this, "Welcome!", Toast.LENGTH_LONG).show();
//take user to homepage
}else{
//error signing up user
}
}
});
}
});
}
#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);
}
}
Here is the corresponding activity_register.xml
<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="com.parse.inclassmode.RegisterActivity">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:hint="username"
android:ems="10"
android:id="#+id/usernameRegisterEditText"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="142dp" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:hint="email"
android:ems="10"
android:id="#+id/emailRegisterEditText"
android:layout_below="#+id/usernameRegisterEditText"
android:layout_centerHorizontal="true" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:hint="password"
android:ems="10"
android:id="#+id/passwordRegisterEditText"
android:layout_below="#+id/emailRegisterEditText"
android:layout_centerHorizontal="true" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="sign up"
android:id="#+id/registerButton"
android:layout_marginTop="42dp"
android:layout_below="#+id/passwordRegisterEditText"
android:layout_alignParentStart="true" />
</RelativeLayout>
MainActivity.java class which includes my keys for Parse.com
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import com.parse.Parse;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Enable Local Datastore, ID's hidden
Parse.initialize(this, "id", "id");
}
#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_main, 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);
}
}
and finally my android manifest, which launches the register activity then takes the user to the home screen.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.parse.inclassmode" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".RegisterActivity"
android:label="#string/title_activity_register" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="InClassMode" >
</activity>
</application>
</manifest>

Answer 1

Figured it out!
For those of you who may come across this problem, create a new class that is not an activity, from there, initialize the Parse.