Android无法解析符号auth_failed

Question

我刚开始使用Firebase编写新应用程序。问题在于缺少象以下错误的符号：auth_failed，minimum_password。我尝试重建项目，创建一个完整的新应用程序，但仍然失踪​​。

我该如何解决这个问题？

public class MainActivity extends AppCompatActivity { 

private static final String TAG = "MainActivity"; 

private EditText etInputEmail; 
private EditText etInputPassword; 
private Button btnRegister; 

private FirebaseAuth mAuth; 

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

    etInputEmail = (EditText) findViewById(R.id.etInputEmail); 
    etInputPassword = (EditText) findViewById(R.id.etInputPassword); 
    btnRegister = (Button) findViewById(R.id.btnRegister); 

    mAuth = FirebaseAuth.getInstance(); 

    btnRegister.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      String email = etInputEmail.getText().toString().trim(); 
      String password = etInputPassword.getText().toString().trim(); 

      mAuth.createUserWithEmailAndPassword(email, password).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() { 
       @Override 
       public void onComplete(@NonNull Task<AuthResult> task) { 
        Log.d(TAG, "createUserWithEmail:onComplete:" + task.isSuccessful()); 

        if (!task.isSuccessful()) { 
         Toast.makeText(MainActivity.this, R.string.auth_failed, Toast.LENGTH_SHORT).show(); 
        } 
       } 
      }); 
     } 
    }); 

} 

Answer 1

在strings.xml文件就定义AUTH_FAILED串....如果你看看那里被带到这个代码样本中的strings.xml中，你可以看到它定义有：https://github.com/firebase/quickstartandroid/blob/master/auth/app/src/main/res/values/strings.xml