AllUsers活动停止工作

Question

我创建了AllUsersActivity，它必须在其中获取并显示所有注册用户。但它崩溃并返回MainActivity。也许这行有错误：Picasso.get().load(user_image).into(image);

如果需要查看更多代码，请写评论。

import android.content.Context;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import android.support.v7.widget.Toolbar;

import android.view.View;

import android.widget.TextView;

import com.firebase.ui.database.FirebaseRecyclerAdapter;

import com.google.firebase.database.DatabaseReference;

import com.google.firebase.database.FirebaseDatabase;

import com.squareup.picasso.Picasso;

import de.hdodenhof.circleimageview.CircleImageView;

public class AllUsersActivity extends AppCompatActivity {

    private Toolbar mToolbar;

    private RecyclerView allUsersList;

    private DatabaseReference allDatabaseUserReference;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_all_users);

        mToolbar = (Toolbar) findViewById(R.id.all_users_app_bar);

        setSupportActionBar(mToolbar);

        getSupportActionBar().setTitle("All Users");

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        allUsersList = (RecyclerView) findViewById(R.id.all_users_list);

        allUsersList.setHasFixedSize(true);

        allUsersList.setLayoutManager(new LinearLayoutManager(this));

        allDatabaseUserReference = FirebaseDatabase.getInstance().getReference().child("Users");

    }