未连接适配器；跳过布局跳过 1 到 2 帧

Question

我已经尝试寻找答案，但没有一个有效，但我相信这段代码有问题，调试器说

这是我文件的链接：TodoListApp

跳过了 1 帧！应用程序可能在其主线程上做了太多工作

// working with data
    ourdoes = findViewById(R.id.ourdoes);
    ourdoes.setLayoutManager(new LinearLayoutManager(this));
    list = new ArrayList<MyDoes>();

    // get data from firebase
    reference = FirebaseDatabase.getInstance().getReference().child("SeaLab13");
    reference.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            // set code to retrive data and replace layout
            for(DataSnapshot dataSnapshot1: dataSnapshot.getChildren())
            {
                MyDoes p = dataSnapshot1.getValue(MyDoes.class);
                list.add(p);
            }
            doesAdapter = new DoesAdapter(MainActivity.this, list);
            ourdoes.setAdapter(doesAdapter);
            doesAdapter.notifyDataSetChanged();
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            // set code to show an error
            Toast.makeText(getApplicationContext(), "No Data", Toast.LENGTH_SHORT).show();
        }
    });

Answer 1

在你的 onCreate 中：

// Set up your RecyclerView with the appropriate Layout Manager
RecyclerView myRecycler = findViewById(R.id.my_recycler_id);
myRecycler.setLayoutManager(new LinearLayoutManager(this));

// Create your data set
myData = new ArrayList<MyDataType>();

// Create an instance of your adapter passing the data set into the constructor
myAdapter = new MyAdapter(this, myData);

// Set the Adapter on the RecyclerView directly within onCreate
// so that it doesn't get skipped
myRecycler.setAdapter(myAdapter);

在您的事件侦听器回调中：

@Override
public void onDataChange(DataSnapshot snapshot){
    // Add the new data to your data set ex. myData.add(newData)
    // ...

    // After adding to the data set,
    // update the data using a custom function you define in your Adapter's class
    myAdapter.updateData(myData);
}

在您的 Adapter 类中，创建一个函数来更新您的 Adapter 的数据集：

public void updateData(ArrayList<MyDataType> newDataSet){
    myAdapterDataSet = newDataSet;

    // Let the Adapter know the data has changed and the view should be refreshed
    notifyDataSetChanged();
}