【发布时间】：2015-11-15 23:21:59
【问题描述】：
您好，我的 listView 对象只填充了适配器对象中的第一项，这有问题。
下面的代码显示了从文本字段中获取文本的尝试发送()，然后调用 addMessage()。 addMessage() 将此消息对象正确添加到适配器。但不是将适配器中的最后一个对象添加到 listView 中，而是每次都添加第一个对象
public class ChatActivity extends ActionBarActivity {
private String mName;
private int mId;
private TextView mEditText;
private ArrayList<MessageDTO> mMessages;
private MessageListAdapter adapter ;
private ListView listView;
private String mUsername = ProfileDTO.sUserProfileDTO.getmName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
Intent intent = getIntent();
// mSocket.on("new message", onNewMessage);
mSocket.connect();
mName= intent.getStringExtra("name");
mId= intent.getIntExtra("id", 0);
mEditText=(TextView)findViewById(R.id.editText);
mMessages = new ArrayList<MessageDTO>();
adapter = new MessageListAdapter(this, mMessages);
listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(adapter);
public void sendMessage(View view) {
attemptSend();
}
private void attemptSend() {
if (null == mUsername) return;
String message = mEditText.getText().toString().trim();
if (TextUtils.isEmpty(message)) {
return;
}
mEditText.setText("");
addMessage(mUsername, message);
mSocket.emit("new message", message);
}
private void addMessage(String username, String message) {
MessageDTO messageDTO = new MessageDTO();
messageDTO.setmMessage(message+", username:" + username);
Log.d("ChatActivity:addMessage", messageDTO.getmMessage());
adapter.add(messageDTO);
}
适配器类
public class MessageListAdapter extends ArrayAdapter<MessageDTO> {
public MessageListAdapter(Context context, ArrayList<MessageDTO> messages) {
super(context, 0, messages);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// Get the data item for this position
MessageDTO message = getItem(position);
// Check if an existing view is being reused, otherwise inflate the view
if (convertView == null ) {
convertView = LayoutInflater.from(getContext()).inflate(R.layout.object_message_list, parent, false);
convertView.setBackgroundResource(R.drawable.rectangle);
// Lookup view for data
TextView messageBody = (TextView) convertView.findViewById(R.id.messageBody);
TextView messageInfo = (TextView) convertView.findViewById(R.id.messageInfo);
// Populate the data into the template view using the data object
messageBody.setText(message.getmMessage());
messageInfo.setText(message.getmDate()+" "+message.getmTime());
// Return the completed view to render on screen
if (message.getmUserId() == ProfileDTO.sUserProfileDTO.getmId()){
convertView.setBackgroundColor(getContext().getResources().getColor(R.color.blue));
messageBody.setTextColor(getContext().getResources().getColor(R.color.white));
messageInfo.setTextColor(getContext().getResources().getColor(R.color.white));
}else{
convertView.setBackgroundColor(getContext().getResources().getColor(R.color.grey));
messageBody.setTextColor(getContext().getResources().getColor(R.color.black));
messageInfo.setTextColor(getContext().getResources().getColor(R.color.black));
}
}
return convertView;
}
【问题讨论】：
标签： android listview android-listview