Question

使用firebase登录内部后，HomeActivity.java甚至没有烘烤。是什么原因造成的。我在Android Oreo虚拟电话上使用Android SDK 5.0

//  Verify that the user passed a hostname.
if (hostname!=NULL)
{
    //  Convert argv[] to a wchar_t*
    size_t origsize = strlen(argv[1]) + 1;
    size_t convertedChars = 0;
    wchar_t wcstring[newsize];
    mbstowcs_s(convertedChars, wcstring, origsize, argv[1], _TRUNCATE);
    wcscat_s(wcstring, L" (wchar_t *)");
    hostName = wcstring;
}
else
{
    hostName = NULL;
}

//  Initialize a session. LDAP_PORT is the default port, 389.
pLdapConnection = ldap_init(hostName, LDAP_PORT);

if (pLdapConnection == NULL)
{
    //  Set the HRESULT based on the Windows error code.
    char hr = HRESULT_FROM_WIN32(GetLastError());
    printf( "ldap_init failed with 0x%x.\n",hr);
    goto error_exit;
}
else
    printf("ldap_init succeeded \n");

//  Set the version to 3.0 (default is 2.0).
returnCode = ldap_set_option(pLdapConnection,
                             LDAP_OPT_PROTOCOL_VERSION,
                             (void*)&amp;version);
if(returnCode == LDAP_SUCCESS)
    printf("ldap_set_option succeeded - version set to 3\n");
else
{
    printf("SetOption Error:%0X\n", returnCode);
    goto error_exit;
}

// Connect to the server.
connectSuccess = ldap_connect(pLdapConnection, NULL);

if(connectSuccess == LDAP_SUCCESS)
    printf("ldap_connect succeeded \n");
else
{
    printf("ldap_connect failed with 0x%x.\n",connectSuccess);
    goto error_exit;
}

//  Bind with current credentials (login credentials). Be
//  aware that the password itself is never sent over the 
//  network, and encryption is not used.
printf("Binding ...\n");

returnCode = ldap_bind_s(pLdapConnection, NULL, NULL,
                         LDAP_AUTH_NEGOTIATE);
if (returnCode == LDAP_SUCCESS)
    printf("The bind was successful");
else
    goto error_exit;

//  Normal cleanup and exit.
ldap_unbind(pLdapConnection);
return 0;

//  On error cleanup and exit.
error_exit:
    ldap_unbind(pLdapConnection);
    return -1;

下面的activity_home.xml是以上代码的XML

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

public class HomeActivity extends AppCompatActivity {

    Button bt_logout;
    private FirebaseAuth mAuth;
    private FirebaseUser user;

    @Override
    protected void onStart() {
        super.onStart();
        mAuth = FirebaseAuth.getInstance();
        user = mAuth.getCurrentUser();
    }

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

        bt_logout = (Button)findViewById(R.id.button_logout);

        bt_logout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(HomeActivity.this, user + " has Logged out", Toast.LENGTH_LONG).show();
                //mAuth.signOut();
                //setContentView(R.layout.activity_main);
            }
        });

    }
}

有1个TextView，1个EditView和1个按钮

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout 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"
        tools:context=".HomeActivity">


    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello you have logged in"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:id="@+id/txt_welcome"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Logout"
        android:id="@+id/button_logout"
        android:layout_below="@+id/txt_welcome"
        android:layout_centerHorizontal="true"/>

</RelativeLayout>

上面是我没有红色错误的流浪猫

Answer 1

我终于通过在检查用户会话时从登录活动中删除setContentView方法来使它起作用。

更新后的代码是-

FirebaseAuth mAuth = FirebaseAuth.getInstance();
FirebaseUser user = mAuth.getCurrentUser();

if(user != null){
  //setContentView(R.layout.activity_home);       // removed this
}

第二活动在Android Studio中无法正常工作

1 个答案: