在Android Studio中收到错误“无法解析符号FirebaseAuth”

Question

在Android Studio中获取错误“无法解析符号FirebaseAuth”

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.google.firebase.auth.FirebaseAuth;
public class MainActivity extends AppCompatActivity {

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

        firebaseAuth.FirebaseAuth.getInstance();
    }
}

我添加并同步了以下依赖项

compile 'com.google.firebase:firebase-core:11.8.0'
compile 'com.google.firebase:firebase-auth:11.8.0'
compile "com.google.android.gms:play-services-gcm:11.8.0"

创建FirebaseAuth变量没有错误。在我清理了项目之后，我仍然在这一行收到错误：

 firebaseAuth.FirebaseAuth.getInstance();

Answer 1

这不应该是这样的

 firebaseAuth.FirebaseAuth.getInstance();

应该是这样的

   firebaseAuth = FirebaseAuth.getInstance();

完整代码：

public class MainActivity extends AppCompatActivity {

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

    firebaseAuth = FirebaseAuth.getInstance();

}
}