E/AndroidRuntime: FATAL EXCEPTION: main
              Process: shop.easy.app.x.com.x, PID: 10183
              java.lang.RuntimeException: Unable to start activity ComponentInfo{shop.easy.app.x.com.x/shop.easy.app.x.com.x.Acceso}: java.lang.ClassCastException: android.support.v7.widget.AppCompatAutoCompleteTextView cannot be cast to com.rengwuxian.materialedittext.MaterialEditText
                  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
                  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
                  at android.app.ActivityThread.-wrap11(Unknown Source:0)
                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
                  at android.os.Handler.dispatchMessage(Handler.java:105)
                  at android.os.Looper.loop(Looper.java:164)
                  at android.app.ActivityThread.main(ActivityThread.java:6541)
                  at java.lang.reflect.Method.invoke(Native Method)
                  at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
               Caused by: java.lang.ClassCastException: android.support.v7.widget.AppCompatAutoCompleteTextView cannot be cast to com.rengwuxian.materialedittext.MaterialEditText
                  at shop.easy.app.x.com.x.Acceso.onCreate(Acceso.java:35)
                  at android.app.Activity.performCreate(Activity.java:6975)
                  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1213)
                  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2770)
                  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
                  at android.app.ActivityThread.-wrap11(Unknown Source:0)
                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
                  at android.os.Handler.dispatchMessage(Handler.java:105)
                  at android.os.Looper.loop(Looper.java:164)
                  at android.app.ActivityThread.main(ActivityThread.java:6541)
                  at java.lang.reflect.Method.invoke(Native Method)
                  at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

package shop.easy.app.x.com.x;

EditText edtPhone,edtPassword;
Button btnSignIn;


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


    edtPhone = (MaterialEditText)findViewById(R.id.edtPhone);
    edtPassword = (MaterialEditText)findViewById(R.id.edtPassword);
    btnSignIn = (Button)findViewById(R.id.btnSignIn);



    //init firebase

    final FirebaseDatabase database = FirebaseDatabase.getInstance();
    final DatabaseReference table_user = database.getReference("Usuario");

    btnSignIn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            final ProgressDialog mDialog = new ProgressDialog(Acceso.this);
            mDialog.setMessage("Por favor espera...");
            mDialog.show();

            table_user.addValueEventListener(new ValueEventListener() {


                @Override
                public void onDataChange(DataSnapshot dataSnapshot) {

                    //comprobar si el usuario no existe en la base de datos
                    if (dataSnapshot.child(edtPhone.getText().toString()).exists()) {

                        //Informacion usuario

                        mDialog.dismiss();
                        Usuario usuario = dataSnapshot.child(edtPhone.getText().toString()).getValue(Usuario.class);
                        if (usuario.getContraseña().equals(edtPassword.getText().toString())) {
                            {
                                Intent homeintent = new Intent(Acceso.this,Inicio.class);
                                Common.currentUsuario =  usuario;
                                startActivity(homeintent);
                                finish();
                            }
                        } else {
                            Toast.makeText(Acceso.this, "Constraseña incorrecta !!", Toast.LENGTH_SHORT).show();
                        }
                    }
                    else
                    {
                        mDialog.dismiss();
                        Toast.makeText(Acceso.this, "Usuario no registrado en base de dato", Toast.LENGTH_SHORT).show();
                    }

                }

                @Override
                public void onCancelled(DatabaseError databaseError) {
                }
            });
        }
    });

}