04-01 15:49:51.910 16167-17235/? E/Volley: [43499] BasicNetwork.performRequest: Unexpected response code 400 for https://securetoken.googleapis.com/v1/token?alt=proto&key=API_KEY
04-01 15:50:07.573 16167-17232/? E/Volley: [43496] BasicNetwork.performRequest: Unexpected response code 400 for https://securetoken.googleapis.com/v1/token?alt=proto&key=API_KEY
04-01 15:50:34.689 16167-17233/? E/Volley: [43497] BasicNetwork.performRequest: Unexpected response code 400 for https://securetoken.googleapis.com/v1/token?alt=proto&key=API_KEY

package com.rrr.cafemat;

import android.app.ProgressDialog;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Patterns;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import com.rengwuxian.materialedittext.MaterialEditText;
import com.rrr.cafemat.CurrentUser.Client;
import com.rrr.cafemat.Modelo.User;

/* .java de activity Sign_in (Iniciar sesión) */

public class SignIn extends AppCompatActivity implements View.OnClickListener{

    //private static final int PER_LOGIN = 1000;  //Maximo LogIn a la vez
    EditText edtMatricula, edtPassword, edtPhone;
    Button btnSignIn, btnSendEmail,btn_about_more,btn_singUp_invitation;
    User user;
    private String email, password;
    //private int emailPress;

    private FirebaseAuth mAuth;

    /**
     * @param savedInstanceState almacena el estado de instancia
     */
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sign_in);

        mAuth = FirebaseAuth.getInstance(); //Instancia con datos de un usuario

        //Desactivar rotación
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

        edtMatricula = (MaterialEditText)findViewById(R.id.edit_text_matricula);
        edtPassword = (MaterialEditText)findViewById(R.id.edit_text_contraseña);
        edtPhone = (MaterialEditText)findViewById(R.id.editPhone);

        btn_singUp_invitation = findViewById(R.id.btn2_invitation);
        btn_about_more = findViewById(R.id.btn1_about);
        btnSignIn = findViewById(R.id.btn3_sign_in);
        btnSendEmail = findViewById(R.id.btnSendEmail);


        btn_about_more.setOnClickListener(this);
        btn_singUp_invitation.setOnClickListener(this);

        //Init Firebase
        final FirebaseDatabase database = FirebaseDatabase.getInstance();
        final DatabaseReference table_user = database.getReference("User");


        btnSignIn.setOnClickListener(new View.OnClickListener(){

            /**
             * @param view almacena un objeto tipo view (TextView, ImageView,etc)
             */
            @Override
            public void onClick(View view){

                final ProgressDialog mDialog = new ProgressDialog(SignIn.this);
                mDialog.setMessage(getString(R.string.esperar));
                mDialog.show();

                table_user.addValueEventListener(new ValueEventListener() {

                    /**
                     * @param dataSnapshot almacena una captura de informacion
                     */
                    @Override
                    public void onDataChange(DataSnapshot dataSnapshot) {
                        boolean nullMat = edtMatricula.getText().toString().equals("");
                        boolean nullPass = edtPassword.getText().toString().equals("");

                        String matricula = edtMatricula.getText().toString();
                        String password = edtPassword.getText().toString();

                        //Revisar si usuario no existe en base de datos
                        if(dataSnapshot.child(matricula).exists() && !(nullMat)) {

                            //Agarra info de usuario
                            mDialog.dismiss();

                            // Info de user en firebase
                            user = dataSnapshot.child(matricula).getValue(User.class);

                            if (user.getPassword().equals(password)) {    //Contraseña correcta

                                if(!(user.isBan())){    //No tiene ban

                                    if(user.isPago()){    //Pago inscripcion


                                        verifDatos(); //Para ver si datos estan correctos

                                        //Si usuario introduce telefono en signIn
                                        boolean phoneNull = edtPhone.getText().toString().equals("");
                                        if(!phoneNull){
                                            String phoneS = edtPhone.getText().toString();
                                            table_user.child(matricula).child("phone").setValue(phoneS);
                                        }
                                    }
                                    else
                                        Toast.makeText(SignIn.this, R.string.no_pay, Toast.LENGTH_SHORT).show();
                                }
                                else
                                    Toast.makeText(SignIn.this, R.string.ban, Toast.LENGTH_SHORT).show();
                            }
                            else
                                Toast.makeText(SignIn.this, R.string.fPassword, Toast.LENGTH_SHORT).show();
                        }
                        else if(nullMat || nullPass) {
                            mDialog.dismiss();
                            Toast.makeText(SignIn.this, R.string.cuentaNull, Toast.LENGTH_SHORT).show();
                        }
                        else{
                            mDialog.dismiss();
                            Toast.makeText(SignIn.this, R.string.noCuenta, Toast.LENGTH_SHORT).show();
                        }
                    }

                    /**
                     * @param databaseError almacena un error de base de datos
                     */
                    @Override
                    public void onCancelled(DatabaseError databaseError) {

                    }
                });
            }
        });

        btnSendEmail.setOnClickListener(new View.OnClickListener() {
            /**
             * @param view almacena un objeto tipo view (TextView, ImageView,etc)
             */
            @Override
            public void onClick(View view) {

                if(mAuth != null) {
                    FirebaseUser user = mAuth.getCurrentUser(); //Agarrar Firebase user info

                    if (User.getEmailSent() < 1 && user != null) {

                        if (verifEmail() == 0) {
                            user.sendEmailVerification().addOnCompleteListener(new OnCompleteListener<Void>() {
                                /**
                                 * @param task la tarea de mandar un correo de verificacion
                                 */
                                @Override
                                public void onComplete(@NonNull Task<Void> task) {
                                    Toast.makeText(SignIn.this, R.string.eVerif_sent, Toast.LENGTH_LONG).show();
                                    User.setEmailSent();
                                }
                            });
                        } else
                            Toast.makeText(SignIn.this, R.string.eVerified, Toast.LENGTH_LONG).show();
                    }
                    else
                        Toast.makeText(SignIn.this, R.string.eAlready_sent, Toast.LENGTH_SHORT).show();
                }
            }

        });
    }



    private void verifDatos(){
        String m = edtMatricula.getText().toString().trim();

        if((m.charAt(0) == 'a' || m.charAt(0) == 'A') && Character.isDigit(m.charAt(1))) //Estudiante
            email = m +"@alumnos.uady.mx";
        else { // Maestro
            for (int i = 0; i < m.length(); i++){
                if(Character.isDigit(m.charAt(i))){
                    Toast.makeText(SignIn.this, "Introduzca matricula correcta", Toast.LENGTH_SHORT).show();
                    return;
                }
            }
            email = m + "@correo.uady.mx";
        }

        password = edtPassword.getText().toString().trim();

        if(!Patterns.EMAIL_ADDRESS.matcher(email).matches()){ //Si no existe email
            Toast.makeText(SignIn.this, "Correo no existe", Toast.LENGTH_SHORT).show();
            return;
        }

        mAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {
                if (task.isSuccessful()) {  //Si se puede crear user
                    // Sign up success
                    if(verifEmail() == 1) {
                        Intent intent = new Intent(SignIn.this, LocationFMAT.class);
                        Client.usuarioActual = user;
                        startActivity(intent);
                        finish();

                    }
                } else {

                    // If sign in fails, informale al usuario.
                    Toast.makeText(SignIn.this, "Sign in no valido", Toast.LENGTH_SHORT).show();

                }
            }
        });
    }


    /**
     * @return 0 si correo universitario aun no verificado
     *          1 si correo universitario ya verificado
     */
    private int verifEmail(){
        FirebaseUser user = mAuth.getCurrentUser();

        if(user != null) {

            if (!(user.isEmailVerified())){ //Email no verificada
                Toast.makeText(SignIn.this, R.string.eNoVerified, Toast.LENGTH_SHORT).show();
                return 0;
            }
            else
                return 1; //Email verificado
        }
        else
            Toast.makeText(SignIn.this, "Usuario nulo", Toast.LENGTH_SHORT).show();

        return 0;
    }

    /**
     * @param v almacena un objeto tipo view (TextView, ImageView,etc)
     */
    @Override
    public void onClick(View v) {
        Intent i;

        switch (v.getId()) {
            case R.id.btn1_about: i = new Intent(this, About.class); startActivity(i);
                break;
            case R.id.btn2_invitation: i = new Intent(this, SignUp.class); startActivity(i);
                break;
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    tools:context="com.rrr.cafemat.SignIn"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="30dp"
        android:background="@color/colorPrimaryDark">

        <TextView
            android:id="@+id/text1_logIn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="40dp"
            android:textColor="#fff"
            android:text="@string/logIn_activity" />

        <TextView
            android:id="@+id/text2_logIn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#fff"
            android:text="@string/logIn_activity_description"
            android:textSize="15sp"
            android:layout_marginTop="25dp"/>

        <LinearLayout
            android:layout_marginTop="50dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:layout_gravity="center">

            <Button
                android:id="@+id/btn1_about"
                android:clickable="true"
                android:layout_margin="10dp"
                android:textColor="@color/colorPrimaryDark"
                android:background="@drawable/buttonstyle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/btn1_about"/>

            <Button
                android:id="@+id/btn2_invitation"
                android:clickable="true"
                android:layout_margin="10dp"
                android:textColor="@color/colorPrimaryDark"
                android:background="@drawable/buttonstyle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/btn2_invitation"/>

        </LinearLayout>



    </LinearLayout>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="15dp">
    </LinearLayout>

    <LinearLayout
        android:gravity="center"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <com.rengwuxian.materialedittext.MaterialEditText
            android:id="@+id/edit_text_matricula"
            android:drawablePadding="5dp"
            android:drawableLeft="@drawable/ic_fingerprint_black_24dp"
            android:layout_width="300dp"
            android:layout_height="wrap_content"
            android:hint="@string/editText_1"
            android:singleLine="true"/>

        <com.rengwuxian.materialedittext.MaterialEditText
            android:id="@+id/edit_text_contraseña"
            android:drawablePadding="5dp"
            android:drawableLeft="@drawable/ic_lock_black_24dp"
            android:layout_width="300dp"
            android:layout_height="wrap_content"
            android:hint="@string/editText_2"
            android:inputType="textPassword"
            android:singleLine="true"/>

        <com.rengwuxian.materialedittext.MaterialEditText
            android:id="@+id/editPhone"
            android:drawablePadding="5dp"
            android:drawableLeft="@drawable/phone1"
            android:layout_width="300dp"
            android:layout_height="wrap_content"
            android:hint="@string/editText_5_singUp"
            android:singleLine="true"
            android:inputType="textPassword"/>

        <LinearLayout
            android:layout_marginTop="20dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:layout_gravity="center">

            <Button
                android:id="@+id/btnSendEmail"
                android:clickable="true"
                android:layout_marginRight="10dp"
                android:drawableRight="@drawable/ic_send_black_24dp"
                android:textColor="@color/colorPrimaryDark"
                android:background="@drawable/buttonstyle3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Verificar Correo"/>

            <Button
                android:id="@+id/btn3_sign_in"
                android:clickable="true"
                android:drawablePadding="5dp"
                android:drawableRight="@drawable/ic_send_black_24dp"
                android:layout_marginTop="0dp"
                android:layout_width="160dp"
                android:layout_height="wrap_content"
                android:background="@drawable/buttonstyle3"
                android:text="@string/btn3_sign_in"/>

        </LinearLayout>

    </LinearLayout>

</LinearLayout>