Question

我知道这似乎是一个很愚蠢或容易解决的问题，但是老实说，我已经做了很多尝试来解决这个问题。我的应用程序应该在完成个人资料活动后显示欢迎活动，例如添加您的名字和姓氏等。

下面是用于在填写必填字段（例如名字，姓氏，年龄和性别）的用户个人资料时使用的代码

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

    //Grab firebaseAuth objects
    firebaseAuth = FirebaseAuth.getInstance();
    firebaseDatabase = FirebaseDatabase.getInstance();
    databaseReference = firebaseDatabase.getReference("Users");
    firebaseUser = firebaseAuth.getInstance().getCurrentUser();

    //Set app to full screen
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

    setContentView(R.layout.activity_profile);

    //Get all views
    firstName = findViewById(R.id.profile_firstName);
    lastName = findViewById(R.id.profile_lastName);
    male = findViewById(R.id.profile_male);
    female = findViewById(R.id.profile_female);
    age = findViewById(R.id.profile_age);
    button = findViewById(R.id.profile_button);

    button.setOnClickListener(this);

    //If no user is logged in send them back to Login page
    if (firebaseUser == null)
    {
        Intent intent = new Intent(this, MainActivity.class);
        startActivity(intent);
        finish();
    }

}

private void createUser()
{
    String first_name = firstName.getText().toString().trim();
    String last_name = lastName.getText().toString().trim();

    String gender = "";

    if (male.isChecked())
    {
        gender = "male";
    }

    if (female.isChecked())
    {
        gender = "female";
    }

    if (male.isChecked() && female.isChecked())
    {
        Toast.makeText(this, "Please only select one gender", Toast.LENGTH_SHORT).show();
        return;
    }

    if (male.isChecked() == false && female.isChecked() == false)
    {
        Toast.makeText(this, "Please select a gender", Toast.LENGTH_SHORT).show();
        return;
    }

    int years;

    if (age.getText().toString().length() == 0)
    {
        years = 0;
    }

    else
    {
        years = Integer.parseInt(age.getText().toString());
    }



    boolean profileComplete;

    //Check if profileComplete should be true or false
    if (first_name.length() == 0 || last_name.length() == 0 || gender.length() == 0 || years == 0 || gender.length() == 0)
    {
        profileComplete = false;
    }

    else
    {
        profileComplete = true;
    }

    User user = new User(first_name, last_name, gender, years, FirebaseAuth.getInstance().getCurrentUser().getEmail(), profileComplete);

    //Create a new node for each individual user
    firebaseDatabase.getReference().child("Users/" + FirebaseAuth.getInstance().getCurrentUser().getUid()).setValue(user);

    //Bring them into the welcome screen
    Intent intent = new Intent(this, WelcomeActivity.class);
    startActivity(intent);
    finish();

}

@Override
public void onClick(View view)
{
    if (view == button)
    {
        createUser();
    }
}

在用户对象完全完成并发送到数据库之后，我们可以清楚地看到该活动启动了一个名为WelcomeActivity的新活动。它从一开始就有一个Log.i，它从不触发，而是运行ViewProfileActivity。

这是WelcomeActivity：

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

    Log.i("WelcomeActivity", "We made it to the WelcomeActivity!");

    //Set app to full screen
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

    setContentView(R.layout.activity_welcome);

    //Grab firebaseAuth objects
    String currentUserId = firebaseAuth.getInstance().getCurrentUser().getUid();

    firebaseAuth = FirebaseAuth.getInstance();
    firebaseDatabase = FirebaseDatabase.getInstance();
    databaseReference = firebaseDatabase.getReference("Users/" + currentUserId);

    welcomeUser = findViewById(R.id.id_welcome_user);

    final User user = new User();

    databaseReference.addValueEventListener(new ValueEventListener()
    {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot)
        {
            user.setFirstName(dataSnapshot.getValue(User.class).getFirstName());
            welcomeUser.setText(user.getFirstName().toString());
        }

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError)
        {

        }
    });


}

这是ViewProfileActivity（它应该在欢迎活动之后运行。现在，welcomeActivity没有意图运行ViewProfileActivity，因为到目前为止我什至无法将它放到那里。）：

protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

    //Set app to full screen
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);


    setContentView(R.layout.activity_view_profile);

    //Grab firebaseAuth objects
    String currentUserId = firebaseAuth.getInstance().getCurrentUser().getUid();

    firebaseAuth = FirebaseAuth.getInstance();
    firebaseDatabase = FirebaseDatabase.getInstance();
    databaseReference = firebaseDatabase.getReference("Users/" + currentUserId);

     final TextView view_profile_firstName = findViewById(R.id.view_profile_firstname);
     final TextView view_profile_lastName = findViewById(R.id.view_profile_lastname);
     final TextView view_profile_email = findViewById(R.id.view_profile_email);
     final TextView view_profile_age = findViewById(R.id.view_profile_age);
     final TextView view_profile_gender = findViewById(R.id.view_profile_gender);
     final TextView view_profile_profileComplete = findViewById(R.id.view_profile_profilecomplete);

     final User user = new User();

     databaseReference.addValueEventListener(new ValueEventListener()
     {
         @Override
         public void onDataChange(@NonNull DataSnapshot dataSnapshot)
         {
             user.setFirstName(dataSnapshot.getValue(User.class).getFirstName());
             view_profile_firstName.setText(user.getFirstName().toString());

             user.setLastName(dataSnapshot.getValue(User.class).getLastName());
             view_profile_lastName.setText(user.getLastName().toString());

             user.setEmail(dataSnapshot.getValue(User.class).getEmail());
             view_profile_email.setText(user.getEmail().toString());

             user.setAge(dataSnapshot.getValue(User.class).getAge());
             view_profile_age.setText(Integer.toString(user.getAge()));

             user.setGender(dataSnapshot.getValue(User.class).getGender());
             view_profile_gender.setText(user.getGender());

             user.setProfileComplete(dataSnapshot.getValue(User.class).getProfileComplete());
             view_profile_profileComplete.setText(String.valueOf(user.getProfileComplete()));

         }

         @Override
         public void onCancelled(@NonNull DatabaseError databaseError)
         {

         }
     });


}

起初

setContentView(R.layout.activity_welcome);

是错误的，并保留了layout.activity_view_profile。我认为解决此问题很容易解决我的问题，但似乎没有什么改变。我已经重建并清理了我的项目，完全卸载了apk并将其重新安装在模拟器和物理设备上，似乎什么也没有用。我想这是一个编码错误，但我似乎无法查明。

我的假设是其他活动正在运行，并且它们的onDataChange方法正在不断检查并执行对ViewProfileActivity的意图，但是我在每个startActivity（）的末尾放置了finish（）。

非常感谢所有帮助，因为这限制了我使用此应用的进度。到目前为止，我将继续研究直到找到解决方案为止。

清单：

<?xml version="1.0" encoding="utf-8"?>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name=".Registration" />
    <activity android:name=".ProfileActivity" />
    <activity android:name=".ViewProfileActivity" />
    <activity android:name=".WelcomeActivity"></activity>
</application>

更新：在注释掉if语句中的代码之后，我终于能够使用WelcomeActivity进行显示。

@Override
                    public void onDataChange(@NonNull DataSnapshot dataSnapshot)
                    {
                        user.setProfileComplete(dataSnapshot.getValue(User.class).getProfileComplete());

                        //The profileComplete method returns TRUE, so we can skip the profile creation.
                        if(user.getProfileComplete())
                        {
                            //Intent intent = new Intent(MainActivity.this, ViewProfileActivity.class);
                            //startActivity(intent);
                            //finish();
                        }

                        //the profileComplete method returns FALSE, we must send the user to the profile creation.
                        else
                        {
                            Intent intent = new Intent(MainActivity.this, ProfileActivity.class);
                            startActivity(intent);
                            finish();
                        }
                    }

此代码位于MainActivity中，用于确定用户配置文件是否完整。如果未完成，则会发送给他们创建个人资料，否则立即发送给他们以查看个人资料。

Answer 1

我认为问题在于您尚未创建要首先加载的活动。

解决方案1： 尝试点击该应用程序

并选择Edit Configuration并将活动设置为在您指定的活动上运行

解决方案2：

在您的.xml文件中，进行所需的活动以像这样首先启动

  <activity
        android:name=".Activities.SplashScreen"
        android:screenOrientation="portrait"
        android:windowSoftInputMode="adjustPan">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />      <--- add this 2 lines
            <category android:name="android.intent.category.LAUNCHER" /> <---
        </intent-filter>
    </activity>

并删除旧的。

Answer 2

简而言之，我创建了一个名为loggingIn的变量，该变量在开始时为false，在用户登录后立即变为true，并且跳过或不跳过配置文件。这样可以防止将来再由MainActivity再次调用onDataChange方法。我只是没有意识到任何其他解决方案，如果有人知道另一种方法，请不要犹豫。否则，谢谢大家的支持！

databaseReference.addValueEventListener(new ValueEventListener()
                {
                    @Override
                    public void onDataChange(@NonNull DataSnapshot dataSnapshot)
                    {
                        if (loggedIn == false)
                        {
                            user.setProfileComplete(dataSnapshot.getValue(User.class).getProfileComplete());

                            //The profileComplete method returns TRUE, so we can skip the profile creation.
                            if(user.getProfileComplete())
                            {
                                Intent intent = new Intent(MainActivity.this, ViewProfileActivity.class);
                                startActivity(intent);
                                loggedIn = true;
                            }

                            //the profileComplete method returns FALSE, we must send the user to the profile creation.
                            else
                            {
                                Intent intent = new Intent(MainActivity.this, ProfileActivity.class);
                                startActivity(intent);
                                loggedIn = true;

                            }
                        }

                    }

活动被完全跳过

2 个答案: