我有ListView的重复适配器，但在此更改后，我无法在聊天应用程序中看到我的消息，
public class MainActivity extends AppCompatActivity {
private static int SIGN_IN_REQUEST_CODE = 1;
private FirebaseListAdapter<ChatMessage> adapter;
RelativeLayout activity_Main;
FloatingActionButton fab;
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId() == R.id.menu_sign_out)
{
AuthUI.getInstance().signOut(this).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
Snackbar.make(activity_Main,"You have been signed out.", Snackbar.LENGTH_SHORT).show();
finish();
}
});
}
return true;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu,menu);
return true;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == SIGN_IN_REQUEST_CODE)
{
if(resultCode == RESULT_OK)
{
Snackbar.make(activity_Main,"Successfully signed in.Welcome!", Snackbar.LENGTH_SHORT).show();
displayChatMessage();
}
else{
Snackbar.make(activity_Main,"We couldn't sign you in.Please try again later", Snackbar.LENGTH_SHORT).show();
finish();
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
activity_Main = (RelativeLayout)findViewById(R.id.layoutmain);
fab=(FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
EditText input =findViewById(R.id.input);
FirebaseDatabase.getInstance().getReference().push().setValue(new ChatMessage(input.getText().toString(),
FirebaseAuth.getInstance().getCurrentUser().getEmail()));
input.setText("");
}
});
if(FirebaseAuth.getInstance().getCurrentUser()==null) {
startActivityForResult(AuthUI.getInstance().createSignInIntentBuilder().build(),SIGN_IN_REQUEST_CODE);
}
else{
Snackbar.make(activity_Main,"Welcome "+FirebaseAuth.getInstance().getCurrentUser().getEmail(),Snackbar.LENGTH_SHORT).show();
//Load content
displayChatMessage();
}
}
private void displayChatMessage() {
ListView listOfMessage = (ListView)findViewById(R.id.list_of_message);
Query query = FirebaseDatabase.getInstance().getReference().child("chats");
FirebaseListOptions<ChatMessage> options =
new FirebaseListOptions.Builder<ChatMessage>()
.setQuery(query, ChatMessage.class)
.setLayout(android.R.layout.simple_list_item_1)
.build();
adapter = new FirebaseListAdapter<ChatMessage>(options)
{
@Override
protected void populateView(View v, ChatMessage model, int position) {
Log.i("Model", model.toString());
TextView messageText, messageUser, messageTime;
messageText = (TextView) v.findViewById(R.id.message_Text);
messageUser = (TextView) v.findViewById(R.id.message_user);
messageTime = (TextView) v.findViewById(R.id.message_time);
messageText.setText(model.getMessageText());
messageUser.setText(model.getMessageuser());
messageTime.setText(DateFormat.format("dd-MM-yyyy (HH:mm:ss)", model.getMessageTime()));
}
};
listOfMessage.setAdapter(adapter);
}
@Override
protected void onStart() {
super.onStart();
adapter.startListening();
}
@Override
protected void onStop() {
super.onStop();
adapter.stopListening();
}
}
我复制后也将其添加到我的活动中
@Override
protected void onStart() {
super.onStart();
adapter.startListening();
}