Java 为什么进度对话框不显示？

我的编码工作在数据保存在实时数据库中的地方。然而，进展对话不起作用。如果数据未能保存在实时数据库中，如何进行编码

private void SaveAccountInformation() {

    loadingBar.setTitle("Registration Account");
    loadingBar.setMessage("Please wait while we are registering you in our system.");
    loadingBar.show();
    loadingBar.setCanceledOnTouchOutside(true);

    String firstname = RegisterFirstName.getText().toString();
    String lastname = RegisterLastName.getText().toString();

    if (TextUtils.isEmpty(firstname))
        Toast.makeText(RegistrationActivity.this, "Enter your first name.", Toast.LENGTH_SHORT).show();

    else if (TextUtils.isEmpty(lastname))
        Toast.makeText(RegistrationActivity.this, "Last name is required.", Toast.LENGTH_SHORT).show();

    else {
        String userid = databaseUser.push().getKey();
        User user = new User(firstname, lastname);
        databaseUser.child(userid).setValue(user);
        Toast.makeText(RegistrationActivity.this, "Registration has been successful.", Toast.LENGTH_SHORT).show();

        Intent HomeIntent = new Intent(RegistrationActivity.this, home.class);
        HomeIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(HomeIntent);
        finish();
    }

    loadingBar.dismiss();
}

---

据我所知，您希望跟踪数据是否正确保存，同时显示进度对话框。我假设您正在使用Firebase数据库并将值保存在特定节点下

您可以考虑在这里回调函数，我想在您的FielBasic实时数据库中保存数据时。p> 我正在重写代码。请注意，代码未经测试，如果出现语法错误，请进行修改

private void SaveAccountInformation() {

    ProgressDialog loadingBar = new ProgressDialog(RegistrationActivity.this);
    loadingBar.setMessage("Please wait while we are registering you in our system.");
    loadingBar.show();
    loadingBar.setCanceledOnTouchOutside(true);

    String firstname = RegisterFirstName.getText().toString();
    String lastname = RegisterLastName.getText().toString();

    if (TextUtils.isEmpty(firstname))
        Toast.makeText(RegistrationActivity.this, "Enter your first name.", Toast.LENGTH_SHORT).show();

    else if (TextUtils.isEmpty(lastname))
        Toast.makeText(RegistrationActivity.this, "Last name is required.", Toast.LENGTH_SHORT).show();

    else {

        String userid = databaseUser.push().getKey();
        User user = new User(firstname, lastname);

        databaseUser.child(userid).setValue(user)
            .addOnSuccessListener(new OnSuccessListener<Void>() {
                @Override
                public void onSuccess(Void aVoid) {
                    Toast.makeText(RegistrationActivity.this, "Data saved successfully!", Toast.LENGTH_SHORT).show();
                    loadingBar.dismiss();
                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    Toast.makeText(RegistrationActivity.this, "Failed to save the data", Toast.LENGTH_SHORT).show();
                    loadingBar.dismiss();
                }
            }); 

        Intent HomeIntent = new Intent(RegistrationActivity.this, home.class);
        HomeIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(HomeIntent);
        finish();
    }
}

private void SaveAccountInformation（）{
ProgressDialog loadingBar=新建ProgressDialog（RegistrationActivity.this）；
setMessage（“我们正在系统中为您注册，请稍候”）；
loadingBar.show（）；
loadingBar.SetCanceledOnTouchOut（真）；
String firstname=RegisterFirstName.getText（）.toString（）；
字符串lastname=RegisterLastName.getText（）.toString（）；
if（TextUtils.isEmpty（firstname））
Toast.makeText（RegistrationActivity.this，“输入您的名字”，Toast.LENGTH_SHORT.show（）；
else if（TextUtils.isEmpty（lastname））
Toast.makeText（RegistrationActivity.this，“姓氏是必需的。”，Toast.LENGTH_SHORT.show（）；
否则{
字符串userid=databaseUser.push（）.getKey（）；
User User=新用户（firstname，lastname）；
databaseUser.child（userid）.setValue（user）
.addOnSuccessListener（新的OnSuccessListener（）{
@凌驾
成功时公开作废（作废避免）{
Toast.makeText（RegistrationActivity.this，“数据保存成功！”，Toast.LENGTH_SHORT.show（）；
loadingBar.disclose（）；
}
})
.addOnFailureListener（新的OnFailureListener（）{
@凌驾
public void onFailure（@NonNull异常e）{
Toast.makeText（RegistrationActivity.this，“未能保存数据”，Toast.LENGTH_SHORT.show（）；
loadingBar.disclose（）；
}
}); 
意向HomeIntent=新意向（RegistrationActivity.this，home.class）；
HomeIntent.addFlags（Intent.FLAG_活动_新任务| Intent.FLAG_活动_清除任务）；
startActivity（家庭意向）；
完成（）；
}
}

---

希望能有所帮助。

我不能在这里分享，因为它太长了……您在哪里初始化了加载栏？？进度对话框仅在后台完成作业时显示，并且您正在处理主线程。它正在显示，但您的代码运行速度很快，当您执行任何网络任务时，它将显示，线程和使用根据您的要求哪种类型的操作在使用过程中barThanks先生！我看到了进度对话框，但过了一会儿，它就消失了。

private void SaveAccountInformation() {

    ProgressDialog loadingBar = new ProgressDialog(RegistrationActivity.this);
    loadingBar.setMessage("Please wait while we are registering you in our system.");
    loadingBar.show();
    loadingBar.setCanceledOnTouchOutside(true);

    String firstname = RegisterFirstName.getText().toString();
    String lastname = RegisterLastName.getText().toString();

    if (TextUtils.isEmpty(firstname))
        Toast.makeText(RegistrationActivity.this, "Enter your first name.", Toast.LENGTH_SHORT).show();

    else if (TextUtils.isEmpty(lastname))
        Toast.makeText(RegistrationActivity.this, "Last name is required.", Toast.LENGTH_SHORT).show();

    else {

        String userid = databaseUser.push().getKey();
        User user = new User(firstname, lastname);

        databaseUser.child(userid).setValue(user)
            .addOnSuccessListener(new OnSuccessListener<Void>() {
                @Override
                public void onSuccess(Void aVoid) {
                    Toast.makeText(RegistrationActivity.this, "Data saved successfully!", Toast.LENGTH_SHORT).show();
                    loadingBar.dismiss();
                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    Toast.makeText(RegistrationActivity.this, "Failed to save the data", Toast.LENGTH_SHORT).show();
                    loadingBar.dismiss();
                }
            }); 

        Intent HomeIntent = new Intent(RegistrationActivity.this, home.class);
        HomeIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(HomeIntent);
        finish();
    }
}