Question

我是Android编程的新手，我试图创建这个应用程序，但我总是卡住并遇到这个问题，

E/Environment: initForCurrentUser:userId= 0

任何人都可以帮助我吗？这是我的代码，

Database.java

package com.example.acer.drcoffee;

import android.support.design.widget.CollapsingToolbarLayout;
import android.support.design.widget.FloatingActionButton; import 
android.support.v7.app.AppCompatActivity; import android.os.Bundle; import 
android.view.View; import android.widget.ImageView; import 
android.widget.TextView; import android.widget.Toast;

import com.cepheuen.elegantnumberbutton.view.ElegantNumberButton; import 
com.example.acer.drcoffee.Database.Database; import 
com.example.acer.drcoffee.Model.Food; import 
com.example.acer.drcoffee.Model.Order; import 
com.google.firebase.database.DataSnapshot; import 
com.google.firebase.database.DatabaseError; import 
com.google.firebase.database.DatabaseReference; import 
com.google.firebase.database.FirebaseDatabase; import 
com.google.firebase.database.ValueEventListener; 
import com.squareup.picasso.Picasso;

public class FoodDetail extends AppCompatActivity {

TextView food_name,food_price,food_description;
ImageView food_image;
CollapsingToolbarLayout collapsingToolbarLayout;
FloatingActionButton btn_Cart;
ElegantNumberButton number_Button;

String foodId="";

FirebaseDatabase database;
DatabaseReference foods;

Food currentFood;

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

    //init Firebase
    database = FirebaseDatabase.getInstance();
    foods = database.getReference("Foods");

    //init View
    number_Button = (ElegantNumberButton)findViewById(R.id.numberButton);
    btn_Cart = (FloatingActionButton)findViewById(R.id.btnCart);

    btn_Cart.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        new Database(getBaseContext()).addToCart(new Order(
                foodId,
                currentFood.getName(),
                number_Button.getNumber(),
                currentFood.getPrice(),
                currentFood.getDiscount()
        ));

        Toast.makeText(FoodDetail.this,"Telah Ditambahkan         !!",Toast.LENGTH_SHORT).show();
    }
});

food_name = (TextView)findViewById(R.id.foodName);
food_price = (TextView)findViewById(R.id.foodPrice);
food_description = (TextView)findViewById(R.id.foodDescription);  
food_image = (ImageView)findViewById(R.id.imgFood);

//Buat style untuk appbar di value/style
collapsingToolbarLayout = (CollapsingToolbarLayout)findViewById(R.id.collapsing);
collapsingToolbarLayout.setExpandedTitleTextAppearance(R.style.ExpandedAppBar);
collapsingToolbarLayout.setCollapsedTitleTextAppearance(R.style.CollapsedAppBar);

//get food ID from Intent
if (getIntent() != null)
    foodId = getIntent().getStringExtra("FoodId");
if (!foodId.isEmpty())
{
    getDetailFood(foodId);
}
}

private void getDetailFood(String foodId) {
foods.child(foodId).addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        currentFood = dataSnapshot.getValue(Food.class);

        //set image
        Picasso.with(getBaseContext()).load(currentFood.getImage())
                .into(food_image);
        collapsingToolbarLayout.setTitle(currentFood.getName());
        food_price.setText(currentFood.getPrice());
        food_name.setText(currentFood.getName());
        food_description.setText(currentFood.getDescription());
    }

    @Override
    public void onCancelled(DatabaseError databaseError) {

    }
});
}
}

Order.java

package com.example.acer.drcoffee.Model;

/** * Created by acer on 09/12/2017. */

public class Order { private String ProductId; private String ProductName;             private String Quantity; private String Price; private String Discount;

public Order() {
}

public Order(String productId, String productName, String quantity, String price, String discount) {
ProductId = productId;
ProductName = productName;
Quantity = quantity;
Price = price;
Discount = discount;
}

public String getProductId() {
return ProductId;
}

public void setProductId(String productId) {
ProductId = productId;
}

public String getProductName() {
return ProductName;
}

public void setProductName(String productName) {
ProductName = productName;
}

public String getQuantity() {
return Quantity;
}

public void setQuantity(String quantity) {
Quantity = quantity;
}

public String getPrice() {
return Price;
}

public void setPrice(String price) {
Price = price;
}

public String getDiscount() {
return Discount;
}

public void setDiscount(String discount) {
Discount = discount;
}
}

FoodDetail.java

package com.example.acer.drcoffee;

import android.support.design.widget.CollapsingToolbarLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle; import android.view.View; 
import android.widget.ImageView; import android.widget.TextView; 
import android.widget.Toast;

import com.cepheuen.elegantnumberbutton.view.ElegantNumberButton; 
import com.example.acer.drcoffee.Database.Database; 
import com.example.acer.drcoffee.Model.Food; 
import com.example.acer.drcoffee.Model.Order; 
import com.google.firebase.database.DataSnapshot; 
import com.google.firebase.database.DatabaseError; 
import com.google.firebase.database.DatabaseReference; 
import com.google.firebase.database.FirebaseDatabase; 
import com.google.firebase.database.ValueEventListener; 
import com.squareup.picasso.Picasso;

public class FoodDetail extends AppCompatActivity {

TextView food_name,food_price,food_description;
ImageView food_image;
CollapsingToolbarLayout collapsingToolbarLayout;
FloatingActionButton btn_Cart;
ElegantNumberButton number_Button;

String foodId="";

FirebaseDatabase database;
DatabaseReference foods;

Food currentFood;

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

//init Firebase
database = FirebaseDatabase.getInstance();
foods = database.getReference("Foods");

//init View
number_Button = (ElegantNumberButton)findViewById(R.id.numberButton);
btn_Cart = (FloatingActionButton)findViewById(R.id.btnCart);

btn_Cart.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        new Database(getBaseContext()).addToCart(new Order(
                foodId,
                currentFood.getName(),
                number_Button.getNumber(),
                currentFood.getPrice(),
                currentFood.getDiscount()
        ));

        Toast.makeText(FoodDetail.this,"Telah Ditambahkan     !!",Toast.LENGTH_SHORT).show();
    }
});

food_name = (TextView)findViewById(R.id.foodName);
food_price = (TextView)findViewById(R.id.foodPrice);
food_description = (TextView)findViewById(R.id.foodDescription);
food_image = (ImageView)findViewById(R.id.imgFood);

//Buat style untuk appbar di value/style
collapsingToolbarLayout =     (CollapsingToolbarLayout)findViewById(R.id.collapsing);
    collapsingToolbarLayout.setExpandedTitleTextAppearance(R.style.ExpandedAppBar);
    collapsingToolbarLayout.setCollapsedTitleTextAppearance(R.style.CollapsedAppBar);

//get food ID from Intent
if (getIntent() != null)
    foodId = getIntent().getStringExtra("FoodId");
if (!foodId.isEmpty())
{
    getDetailFood(foodId);
}
}

private void getDetailFood(String foodId) {
foods.child(foodId).addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        currentFood = dataSnapshot.getValue(Food.class);

        //set image
        Picasso.with(getBaseContext()).load(currentFood.getImage())
                .into(food_image);
        collapsingToolbarLayout.setTitle(currentFood.getName());
        food_price.setText(currentFood.getPrice());
        food_name.setText(currentFood.getName());
        food_description.setText(currentFood.getDescription());
    }

    @Override
    public void onCancelled(DatabaseError databaseError) {

    }
});
}
}

我试图自己解决这个问题，但已经有2个星期了，我仍然不知道如何解决它，所以请任何人帮助我。谢谢

Answer 1

也许你应该重新创建你的项目。创建新项目然后逐个创建每个类并在创建每个类时运行应用程序，或者您可以设置断点并调试项目。也看看这个链接它可能对你有所帮助。 This link represent the class that initiate the current user

我无法解决这个E / Environment：initForCurrentUser：userId = 0

1 个答案: