错误：在two_line_list_item中找不到符号变量text1

Question

无法使用Firebase填充ListView。没有在ListView中添加任何额外的视图。打开时应用程序崩溃。在添加ListView之前，Firebase的数据存储似乎工作得很好。

的build.gradle

compileSdkVersion 24
buildToolsVersion "24.0.2"
minSdkVersion 19
targetSdkVersion 24

MainActivity.java

public class MainActivity extends AppCompatActivity {

    Firebase ref;
    ArrayAdapter<ChatMessage> adapter;
    List<ChatMessage> messages;
    ListView messagesList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button buttonSend = (Button) findViewById(R.id.buttonSend);
        final EditText textMessage = (EditText) findViewById(R.id.etMessage);
        messagesList = (ListView) findViewById(R.id.messagesList);

        Firebase.setAndroidContext(this);
        ref = new Firebase("https://nanochat-cc415.firebaseio.com/");

        buttonSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                ChatMessage chat = new ChatMessage("Fatima",textMessage.getText().toString());
                ref.push().setValue(chat);
                textMessage.setText("");
            }
        });

        messages = new LinkedList<>();

        adapter = new ArrayAdapter<ChatMessage>(this, android.R.layout.two_line_list_item, messages)
        {
            @Override
            public View getView(int position, View view, ViewGroup parent) {
                if(view == null) {
                    view = getLayoutInflater().inflate(android.R.layout.two_line_list_item, parent, false);
                }
                    ChatMessage chat = messages.get(position);
                    ((TextView)view.findViewById(R.id.text1)).setText(chat.getName());
                    ((TextView)view.findViewById(R.id.text2)).setText(chat.getMessage());

                return view;
            }
        };

        messagesList.setAdapter(adapter);

        ref.addChildEventListener(new ChildEventListener() {
            @Override
            public void onChildAdded(DataSnapshot dataSnapshot, String s) {
                ChatMessage chat = dataSnapshot.getValue(ChatMessage.class);
                messages.add(chat);
                adapter.notifyDataSetChanged();
            }

            @Override
            public void onChildChanged(DataSnapshot dataSnapshot, String s) {

            }

            @Override
            public void onChildRemoved(DataSnapshot dataSnapshot) {

            }

            @Override
            public void onChildMoved(DataSnapshot dataSnapshot, String s) {

            }

            @Override
            public void onCancelled(FirebaseError firebaseError) {

            }
        });

    }
}

Answer 1

尝试将android.R.id.text1更改为R.id.text2，将android.R.id.text2更改为class FrameListener { public: struct FrameEvent { double TimeSinceLastEvent; double TimeSinceLastFrame; }; FrameListener() {} ~FrameListener() {} virtual void FrameStart(FrameEvent& evt) = 0; virtual void FrameEnd(FrameEvent& evt) = 0; virtual void OnFrame(FrameEvent& evt) = 0; }; class FrameListener_PyWrapper : public FrameListener, public boost::python::wrapper<FrameListener> { public: FrameListener_PyWrapper() {} ~FrameListener_PyWrapper(); void FrameStart(FrameEvent& evt); void FrameEnd(FrameEvent& evt); void OnFrame(FrameEvent& evt); }; 。