Android java gridImageAdapter

ただいま、InstagramCloneを作成しております。
https://www.youtube.com/watch?v=LiOC0nuL0gg&list=PLgCYzUzKIBE9XqkckEJJA0I1wVKbUAOdv&index=16

Youtubeを見ながら作成しています。
gridImageAdapter作成時に以下のエラーが発生しました。
ご教授よろしくお願いいたします。

Process: com.example.instgramclone, PID: 24943
java.lang.IllegalArgumentException: view must not be null
at com.nostra13.universalimageloader.core.imageaware.ViewAware.<init>(ViewAware.java:70)
at com.nostra13.universalimageloader.core.imageaware.ViewAware.<init>(ViewAware.java:50)
at com.nostra13.universalimageloader.core.imageaware.ImageViewAware.<init>(ImageViewAware.java:44)
at com.nostra13.universalimageloader.core.ImageLoader.displayImage(ImageLoader.java:365)
at com.example.instgramclone.Utils.GridImageAdapter.getView(GridImageAdapter.java:62)
at android.widget.AbsListView.obtainView(AbsListView.java:2405)
at android.widget.GridView.onMeasure(GridView.java:1085)
at android.view.View.measure(View.java:24530)

ProfileActivity

java
1public class ProfileActivity extends AppCompatActivity {
2    private static final String TAG = "ProfileActivity";
3    private static final int ACTIVITY_NUM = 4;
4
5    private Context mContext = ProfileActivity.this;
6
7    private ProgressBar mProgressBar;
8    private ImageView profilePhoto;
9
10
11
12    @Override
13    protected void onCreate(@Nullable Bundle savedInstanceState) {
14        super.onCreate(savedInstanceState);
15        setContentView(R.layout.activity_profile);
16        Log.d(TAG,"onCreate: started.");
17
18        mProgressBar = findViewById(R.id.profileProgressBar);
19        mProgressBar.setVisibility(View.GONE);
20
21
22        setupBottomNavigationView();
23        setupToolbar();
24        setupActivityWidgets();
25        setProfileImage();
26
27        tempGridSetup();
28    }
29
30    private void tempGridSetup(){
31        ArrayList<String> imgURLs = new ArrayList<>();
32        imgURLs.add("https://news.mynavi.jp/article/20180417-617921/index_images/index.jpg");
33        imgURLs.add("https://rr.img.naver.jp/mig?src=http%3A%2F%2Fimgcc.naver.jp%2Fkaze%2Fmission%2FUSER%2F20170120%2F54%2F5652024%2F25%2F721x721x3d94427ccbd535e0e48f2bc1.jpg&twidth=1200&theight=1200&qlt=80&res_format=jpg&op=r");
34        imgURLs.add("https://pbs.twimg.com/media/DQVO_CYVAAA02ZA.jpg");
35        imgURLs.add("https://img.cinematoday.jp/a/E0014733/_size_c200x200/_v_1550029749/main.jpg");
36        imgURLs.add("https://stat.ameba.jp/user_images/20190902/13/ibgsugi/4c/d4/p/o0880058014569278596.png?caw=800");
37        imgURLs.add("https://www.sankei.com/images/news/181128/prl1811280044-p1.jpg");
38        imgURLs.add("https://eiga.k-img.com/images/movie/90864/photo/de2bab49be6913e7/640.jpg");
39        imgURLs.add("https://kamizublog.com/wp-content/uploads/2019/08/%E7%94%9F%E7%90%86%E3%81%A1%E3%82%83%E3%82%93%E5%A3%B0.jpg");
40        imgURLs.add("http://livedoor.blogimg.jp/lilicocoyuka/imgs/2/7/277ebde2.jpg");
41        imgURLs.add("https://contents.newspicks.com/images/news/3158452?updatedAt=20180708233123");
42        imgURLs.add("https://sukini164.com/wp-content/uploads/2018/06/douteikun.png");
43
44        setupImageGrid(imgURLs);
45    }
46
47    private void setupImageGrid(ArrayList<String> imgURLs){
48        GridView gridView = findViewById(R.id.gridView);
49
50        GridImageAdapter adapter = new GridImageAdapter(mContext,R.layout.layout_grid_imageview,"",imgURLs);
51        gridView.setAdapter(adapter);
52
53    }
54
55    private void setProfileImage(){
56        Log.d(TAG, "setProfileImage: setting profile photo");
57        String imgURL = "pbs.twimg.com/profile_images/1124847009632899072/L6TtEBAK_400x400.jpg";
58        UniversalImageLoader.setDefaultImage(imgURL,profilePhoto,mProgressBar,"https://");
59    }
60    private void setupActivityWidgets(){
61        mProgressBar = findViewById(R.id.profileProgressBar);
62        mProgressBar.setVisibility(View.GONE);
63        profilePhoto=findViewById(R.id.profile_photo);
64    }
65
66    private void setupToolbar() {
67        Toolbar toolbar = findViewById(R.id.profileToolBar);
68        setSupportActionBar(toolbar);
69
70        ImageView profileMenu = findViewById(R.id.profileMenu);
71        profileMenu.setOnClickListener(new View.OnClickListener() {
72            @Override
73            public void onClick(View v) {
74                Log.d(TAG,"OnClick: navigating to account settings");
75                Intent intent = new Intent(mContext,AccountSettingsActivity.class);
76                startActivity(intent);
77            }
78        });
79    }
80    //BottomNavigationView setup
81    private void setupBottomNavigationView(){
82        Log.d(TAG, "setupBottomNavigationView: setting up BottomNavigationView");
83        BottomNavigationViewEx bottomNavigationViewEx = findViewById(R.id.bottomNavViewBar);
84        BottomNavigationViewHelper.setupBottomNavigationView(bottomNavigationViewEx);
85        BottomNavigationViewHelper.enableNavigation(mContext,bottomNavigationViewEx);
86        Menu menu =bottomNavigationViewEx.getMenu();
87        MenuItem menuItem = menu.getItem(ACTIVITY_NUM);
88        menuItem.setChecked(true);
89
90
91    }}
92

GridImageAdapter

java
1package com.example.instgramclone.Utils;
2
3import android.content.Context;
4import android.graphics.Bitmap;
5import android.view.LayoutInflater;
6import android.view.View;
7import android.view.ViewGroup;
8import android.widget.ArrayAdapter;
9import android.widget.ImageView;
10import android.widget.ProgressBar;
11
12
13import com.example.instgramclone.R;
14import com.nostra13.universalimageloader.core.ImageLoader;
15import com.nostra13.universalimageloader.core.assist.FailReason;
16import com.nostra13.universalimageloader.core.listener.ImageLoadingListener;
17
18import java.util.ArrayList;
19
20public class GridImageAdapter extends ArrayAdapter<String> {
21
22    public Context mContext;
23    private LayoutInflater mInflater;
24    private int layoutResource;
25    private String mAppend;
26    public ArrayList<String> imgURLs;
27
28    public GridImageAdapter(Context context, int layoutResource, String append, ArrayList<String> imgURLs) {
29        super(context,layoutResource,imgURLs);
30        mInflater=(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
31        mContext = context;
32
33        this.layoutResource = layoutResource;
34        mAppend = append;
35        this.imgURLs = imgURLs;
36    }
37    private static class ViewHolder{
38        ImageView image;
39        ProgressBar mProgressBar;
40    }
41
42    @Override
43    public View getView(int position,  View convertView ,ViewGroup parent) {
44
45        final ViewHolder holder;
46
47        if(convertView == null){
48            convertView = mInflater.inflate(layoutResource,parent,false);
49            holder = new ViewHolder();
50            holder.mProgressBar=convertView.findViewById(R.id.profileProgressBar);
51            holder.image = convertView.findViewById(R.id.profile_photo);
52
53            convertView.setTag(holder);
54        }
55        else{
56            holder = (ViewHolder)convertView.getTag();
57        }
58        String imgURL = getItem(position);
59
60        ImageLoader imageLoader = ImageLoader.getInstance();
61
62        imageLoader.displayImage(mAppend + imgURL, holder.image,  new ImageLoadingListener() {
63            @Override
64            public void onLoadingStarted(String imageUri, View view) {
65                if(holder.mProgressBar != null){
66                    holder.mProgressBar.setVisibility(View.VISIBLE);
67                }
68            }
69
70            @Override
71            public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
72                if(holder.mProgressBar != null) {
73                    holder.mProgressBar.setVisibility(View.GONE);
74                }
75
76            }
77
78            @Override
79            public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
80                if (holder.mProgressBar != null) {
81                    holder.mProgressBar.setVisibility(View.GONE);
82                }
83            }
84            @Override
85            public void onLoadingCancelled(String imageUri, View view) {
86                if (holder.mProgressBar != null) {
87                    holder.mProgressBar.setVisibility(View.GONE);
88                }
89            }
90        });
91
92        return convertView;
93    }
94}
95

activity_profie

xml
1<?xml version="1.0" encoding="utf-8"?>
2<androidx.coordinatorlayout.widget.CoordinatorLayout
3    xmlns:android="http://schemas.android.com/apk/res/android"
4    android:orientation="vertical" android:layout_width="match_parent"
5    android:layout_height="match_parent">
6
7    <RelativeLayout
8        android:layout_width="match_parent"
9        android:layout_height="match_parent">
10
11       <include layout="@layout/layout_center_profile"/>
12
13        <include layout="@layout/layout_bottom_navigation_view"/>
14
15        <androidx.core.widget.ContentLoadingProgressBar
16            android:layout_width="150dp"
17            android:layout_height="150dp"
18            android:id="@+id/profileProgressBar"
19            android:layout_centerHorizontal="true"
20            android:layout_marginTop="100dp"
21            />
22    </RelativeLayout>
23
24</androidx.coordinatorlayout.widget.CoordinatorLayout>