java Firebase firestore提供空指针异常

Question

我试图从我的firebase firestore获取数据，我觉得一切正常，但我的文本视图变得空白。我也没有在与概要活动和类相关的日志中得到任何错误。我在我的另一个应用程序中也以同样的方式使用了firestore，它在那里工作得非常好enter image description here 如果你们能在我因为这个错误而停滞不前的时候帮助我，那就太棒了

我的logcat

2020-05-29 14:53:38.381 4280-4280/? E/Zygote: v2
2020-05-29 14:53:38.385 4280-4280/? E/Zygote: accessInfo : 0
2020-05-29 14:53:43.495 4280-4280/com.example.feedme E/BoostFramework: BoostFramework() : Exception_1 = java.lang.ClassNotFoundException: Didn't find class "com.qualcomm.qti.Performance" on path: DexPathList[[],nativeLibraryDirectories=[/system/lib64, /vendor/lib64]]

我的java代码：

 import 安卓.content.Intent;
import 安卓.os.Bundle;
import 安卓.util.Log;
import 安卓.widget.TextView;
import 安卓.widget.Toast;

import 安卓x.annotation.Nullable;
import 安卓x.appcompat.app.AppCompatActivity;

import com.google.安卓.material.bottomnavigation.BottomNavigationView;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.firestore.DocumentReference;
import com.google.firebase.firestore.DocumentSnapshot;
import com.google.firebase.firestore.EventListener;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.FirebaseFirestoreException;
import com.squareup.picasso.Picasso;

import de.hdodenhof.circleimageview.CircleImageView;

public class profile extends AppCompatActivity {

    TextView namea;
    CircleImageView circleImageView;
    BottomNavigationView bottomNavigationView;
    String user_id;
    String url;
FirebaseFirestore fStore;
FirebaseAuth fAuth;



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

        Toast.makeText(this, user_id, Toast.LENGTH_SHORT).show();

        circleImageView = findViewById(R.id.profilepictureuser);
        Picasso.with(this).load(url).resize(400, 400).centerCrop().into(circleImageView);
namea = findViewById(R.id.profilename);
        fStore = FirebaseFirestore.getInstance();
        fAuth = FirebaseAuth.getInstance();
        user_id = fAuth.getCurrentUser().getUid();


        DocumentReference documentReference = fStore.collection("User data").document(user_id);
        documentReference.addSnapshotListener(this, new EventListener<DocumentSnapshot>() {
            @Override
            public void onEvent(@Nullable DocumentSnapshot documentSnapshot, @Nullable FirebaseFirestoreException e) {
                namea.setText(documentSnapshot.getString("Full name"));
            }
        });

            bottomNavigationView = findViewById(R.id.bottom_navigation1);
            bottomNavigationView.setSelectedItemId(R.id.profilelogo);



            bottomNavigationView.setOnNavigationItemSelectedListener(item -> {
                switch (item.getItemId()) {
                    case R.id.profilelogo:
                        return true;
                    case R.id.home:
                        startActivity(new Intent(getApplicationContext(), homepage.class));
                        return true;

                }
                return false;
            });


        }
    }
[enter image description here][1]

配置文件的布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
    xmlns:app="http://schemas.安卓.com/apk/res-auto"
    xmlns:tools="http://schemas.安卓.com/tools"
    安卓:layout_width="match_parent"
    安卓:layout_height="match_parent"
    tools:context=".profile">

    <LinearLayout
        安卓:layout_width="match_parent"
        安卓:layout_height="wrap_content"
        安卓:id="@+id/linearlayout"
        安卓:orientation="vertical">

        <de.hdodenhof.circleimageview.CircleImageView
            安卓:layout_width="80dp"
            安卓:layout_height="80dp"
            安卓:src="@drawable/profile"
            安卓:id="@+id/profilepictureuser"
            安卓:layout_gravity="center"
            安卓:layout_marginTop="30dp"/>

        <TextView
            安卓:id="@+id/profilename"
            安卓:layout_width="wrap_content"
            安卓:layout_height="wrap_content"
            安卓:layout_gravity="center"
            安卓:layout_marginTop="15dp"
            安卓:textColor="#000000"
            安卓:textSize="24sp" />



    </LinearLayout>


    <com.google.安卓.material.bottomnavigation.BottomNavigationView
        安卓:layout_width="match_parent"
        安卓:layout_height="wrap_content"
        安卓:id="@+id/bottom_navigation1"
        安卓:background="#047cfb"
        app:itemIconTint="#ffffff"
        app:itemTextColor="#ffffff"
        app:menu="@menu/menu_navigation"
        安卓:layout_alignParentBottom="true"
        />

</RelativeLayout> 

我的firestore系列：

我添加了一个祝酒词来检查用户id。这是screeshot，代码已经更新了

enter image description here