Listview没有填充ArrayList

Question

我觉得这将是一个简单的错误，但我一直在尝试填充HOURS的列表视图。我正在从Firebase检索值（这很好，因为我在日志中看到数据。）然后将该值添加到“数组列表”中。任何帮助都将是惊人的！谢谢大家

我尝试了几种不同的方法（使用string []而不是列表视图等，但是这些都不起作用。

public class ListTaskActivity extends AppCompatActivity {


ListView list;

FirebaseAuth mAuth;
String mCurrentUser;
MyListView adapter;

ArrayList<String> mylist = new ArrayList<String>();

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

    mAuth = FirebaseAuth.getInstance();
    mCurrentUser = mAuth.getCurrentUser().getUid();

    retrieveAllTask();

    adapter = new MyListView(this, mylist);

    list= findViewById(R.id.mListView);
    list.setAdapter(adapter);

}

public void retrieveAllTask(){

    DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
    DatabaseReference ref = rootRef.child("Daily Task").child(mCurrentUser);

    ValueEventListener eventListener = new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {

            for(DataSnapshot ds : dataSnapshot.getChildren()) {

                String theTaskName = ds.child("Daily Name").getValue(String.class);

                Log.d("Task Name", theTaskName);
                mylist.add(theTaskName);
            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {}
    };
    ref.addListenerForSingleValueEvent(eventListener);
}

}






public class MyListView extends ArrayAdapter {

private final Activity context;
private ArrayList maintitle = new ArrayList<>();


public MyListView(Activity context, ArrayList<String>maintitle) {
    super(context, R.layout.list_row_layout, maintitle);
    // TODO Auto-generated constructor stub

    this.context=context;
    this.maintitle=maintitle;

}

public View getView(int position,View view,ViewGroup parent) {
    LayoutInflater inflater=context.getLayoutInflater();
    View rowView=inflater.inflate(R.layout.list_row_layout, null,true);

    TextView titleText = rowView.findViewById(R.id.title);

    titleText.setText((Integer) maintitle.get(position));

    return rowView;

};
}

我的布局资源

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:padding="5dip" >

<TextView
    android:id="@+id/title"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:textSize="25sp"
    android:text="list item 1"
    android:textStyle="bold"
    android:typeface="sans"
    android:textColor="@android:color/black"/>

<ImageView
    android:id="@+id/deleteTaskImage"
    android:layout_width="50dp"
    android:layout_height="50dp"
    android:src="@drawable/ic_delete_forever_black_24dp"
    android:tint="@android:color/holo_red_dark"

    />

<ImageView
    android:id="@+id/completeTaskImage"
    android:layout_width="50dp"
    android:layout_height="50dp"

    android:layout_alignParentEnd="true"
    android:layout_alignParentTop="true"
    android:src="@drawable/ic_check_circle_black_24dp"
    android:tint="@android:color/holo_green_light"/>

</RelativeLayout>