NPE Button mit Butterknife

Question

Ich versuche eine Übung von edx.org (Chat Firebase, ganzer Code von https://github.com/ykro/android-chat-firebase) und ich kann nicht verstehen, wo dieser Fehler kommt, es ist ein NPE, aber es bringt mich aus, es stürzt ab wenn Anwendung läuft auf Genymotion Emulator.

ERROR

java.lang.RuntimeException: Unable to start activity ComponentInfo{cat.edx_manel.exercises.chatfirebase/cat.edx_manel.exercises.chatfirebase.activities.LoginActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setEnabled(boolean)' on a null object reference 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148)                      
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setEnabled(boolean)' on a null object reference 
at cat.edx_manel.exercises.chatfirebase.activities.LoginActivity.setInputs(LoginActivity.java:114) 
at cat.edx_manel.exercises.chatfirebase.activities.LoginActivity.disableInputs(LoginActivity.java:57) 
at cat.edx_manel.exercises.chatfirebase.implementations.login.LoginPresenterImpl.checkForAuthenticateUser(LoginPresenterImpl.java:43) 
at cat.edx_manel.exercises.chatfirebase.activities.LoginActivity.onCreate(LoginActivity.java:46) 
at android.app.Activity.performCreate(Activity.java:6237) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:110) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)  
at android.app.ActivityThread.-wrap11(ActivityThread.java)  
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)  
at android.os.Handler.dispatchMessage(Handler.java:102)  
at android.os.Looper.loop(Looper.java:148)  
at android.app.ActivityThread.main(ActivityThread.java:5417)  
at java.lang.reflect.Method.invoke(Native Method) 

LOGINACTIVITY

public class LoginActivity extends AppCompatActivity implements LoginView { 

@BindView(R.id.user) 
EditText inputEmail; 
@BindView(R.id.pass) 
EditText inputPassword; 
@BindView(R.id.signIn) 
Button btnSignIn; 
@BindView(R.id.signUp) 
Button btnSignUp; 
@BindView(R.id.progressBar) 
ProgressBar progressBar; 
@BindView(R.id.layoutMainContainer) 
RelativeLayout container; 

private LoginPresenter loginPresenter; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_login); 
    ButterKnife.bind(this); 

    loginPresenter = new LoginPresenterImpl(this); 
    loginPresenter.onCreate(); 
    loginPresenter.checkForAuthenticateUser(); 
} 

@Override 
protected void onDestroy() { 
    loginPresenter.onDestroy(); 
    super.onDestroy(); 
} 

@Override 
public void disableInputs() { 
    setInputs(false); 
} 

@Override 
public void enableInputs() { 
    setInputs(true); 
    hideProgress(); 
} 

@Override 
public void showProgress() { 
    progressBar.setVisibility(View.VISIBLE); 
} 

@Override 
public void hideProgress() { 
    progressBar.setVisibility(View.INVISIBLE); 
} 

@Override 
@OnClick(R.id.signUp) 
public void handleSignUp() { 
    loginPresenter.registerNewUser(inputEmail.getText().toString(), 
      inputPassword.getText().toString()); 
} 
@Override 
@OnClick(R.id.signIn) 
public void handleSignIn() { 
    loginPresenter.validateLogin(inputEmail.getText().toString(), 
      inputPassword.getText().toString()); 
} 

@Override 
public void navigateToMainScreen() { 
    startActivity(new Intent(this, ContactListActivity.class)); 
} 

@Override 
public void loginError(String error) { 
    inputPassword.setText(""); 
    String msgError = String.format(getString(R.string.login_error_message_signin), error); 
    inputPassword.setError(msgError); 
} 

@Override 
public void newUserSuccess() { 
    Snackbar.make(container, R.string.login_error_message_signup, Snackbar.LENGTH_SHORT).show(); 
} 

@Override 
public void newUserError(String error) { 
    inputPassword.setText(""); 
    String msgError = String.format(getString(R.string.login_error_message_signup), error); 
    inputPassword.setError(msgError); 
} 

private void setInputs(boolean enabled) { 
    btnSignIn.setEnabled(enabled); 
    btnSignUp.setEnabled(enabled); 
    inputEmail.setEnabled(enabled); 
    inputPassword.setEnabled(enabled); 
    } 
} 

Wie Sie sehen können, Button von Buttermesser Rahmen binded ist, aber ich weiß nicht, was es bewirkt, dass ...

Vielen Dank

UPDATED

LAYOUT

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:id="@+id/layoutMainContainer" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:gravity="center" 
android:paddingBottom="@dimen/activity_vertical_margin" 
android:paddingLeft="@dimen/activity_horizontal_margin" 
android:paddingRight="@dimen/activity_horizontal_margin" 
android:paddingTop="@dimen/activity_vertical_margin" 
tools:context=".activities.LoginActivity"> 

<android.support.design.widget.TextInputLayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"> 

    <EditText 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:inputType="textPersonName" 
     android:hint="Name" 
     android:ems="10" 
     android:id="@+id/user"/> 

</android.support.design.widget.TextInputLayout> 

<android.support.design.widget.TextInputLayout 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content"> 

    <EditText 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:inputType="textPersonName" 
     android:hint="Password" 
     android:ems="10" 
     android:id="@+id/pass"/> 

</android.support.design.widget.TextInputLayout> 

<LinearLayout 
    android:id="@+id/layoutButtons" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:orientation="horizontal"> 

    <Button 
     android:id="@+id/signIn" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" /> 

    <Button 
     android:id="@+id/signUp" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" /> 

</LinearLayout> 

<ProgressBar 
    style="?android:attr/progressBarStyleLarge" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/progressBar" 
    android:layout_below="@id/layoutButtons"/> 

UPDATE 2

Loginview INTERFACE

public interface LoginView { 
void enableInputs(); 
void disableInputs(); 
void showProgress(); 
void hideProgress(); 

void handleSignUp(); 
void handleSignIn(); 

void navigateToMainScreen(); 
void loginError(String error); 

void newUserSuccess(); 
void newUserError(String error); 
} 

Answer 1

Ich verweise auf das Tutorial unter ButterKnife tutorial. Ich denke, anstatt mit @BindView sollte es

@Bind(R.id.button) 
Button button; 
@Bind(R.id.textView) 
TextView textView; 
@Bind(R.id.radioButton) 
RadioButton radioButton; 
@Bind(R.id.checkBox) 

Answer 2

Erste @Bind werden, here ist eine meiner Antworten, die ich richtig einrichten butter geteilt.

dieses mögliche Problem vor:

Was du hier Aufschalten?

@Override //this line here 
@OnClick(R.id.signUp) 
public void handleSignUp() { 
    loginPresenter.registerNewUser(inputEmail.getText().toString(), 
     inputPassword.getText().toString()); 
} 

@Override //this line here 
@OnClick(R.id.signIn) 
public void handleSignIn() { 
    loginPresenter.validateLogin(inputEmail.getText().toString(), 
     inputPassword.getText().toString()); 
} 

Versuchen Sie stattdessen, ohne dass die Überschreibungen:

@OnClick(R.id.signUp) 
public void handleSignUp() { 
    loginPresenter.registerNewUser(inputEmail.getText().toString(), 
     inputPassword.getText().toString()); 
} 


@OnClick(R.id.signIn) 
public void handleSignIn() { 
    loginPresenter.validateLogin(inputEmail.getText().toString(), 
     inputPassword.getText().toString()); 
} 

reinigen Sie dann Ihr Projekt und wieder laufen!

Ich hoffe, das hilft!