问题描述
- android ListView Adapter不显示
-
//activity
package wk.bluetooth;import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.view.inputmethod.InputMethodManager;
import android.widget.*;
import android.widget.AdapterView.OnItemClickListener;
import android.view.View.OnClickListener;import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;import wk.bluetooth.StartServer.ChatListItem;
public class StartClient extends Activity implements OnItemClickListener ,OnClickListener{
private ListView mListView; ChatAdapter mAdapter; private ArrayList<ChatListItem> list; private EditText sendMessage; private Button sendButton; private TextView title; private ImageButton back; private String joinChatRoomName; private String address; private String nowTime; private BluetoothSocket socket; private BluetoothDevice device = null; private clientThread startClient = null; private readThread mreadThread = null; private BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); Context mContext; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); setContentView(R.layout.chat); getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.titlebar); Bundle bundle = this.getIntent().getExtras(); joinChatRoomName = bundle.getString("joinChatRoomName"); address = bundle.getString("address"); mContext = this; init(); } private void init(){ device = mBluetoothAdapter.getRemoteDevice(address); list = new ArrayList<ChatListItem>(); mAdapter = new ChatAdapter(mContext, list); mListView = (ListView) findViewById(R.id.chat_list); mListView.setAdapter(mAdapter); //mListView.setOnItemClickListener(this); mListView.setFastScrollEnabled(true); title = (TextView) findViewById(R.id.title); title.setText(joinChatRoomName); back = (ImageButton) findViewById(R.id.back); back.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { if(mreadThread!=null){ mreadThread.interrupt(); } if(startClient != null){ startClient.interrupt(); } list.clear(); StartClient.this.finish(); } }); sendMessage = (EditText)findViewById(R.id.MessageText); sendButton = (Button)findViewById(R.id.btn_msg_send); sendButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { String msg= sendMessage.getText().toString(); if(msg.length()>0){ SendMessageHandle(msg); sendMessage.setText(""); sendMessage.clearFocus(); InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE); imm.hideSoftInputFromWindow(sendMessage.getWindowToken(), 0); }else{ Toast.makeText(mContext, "消息发送失败", Toast.LENGTH_SHORT).show(); sendMessage.setText(""); sendMessage.clearFocus(); } } }); if(Bluetooth.joinChatRoom.get(address)) { Log.d("StartClient","join again"); mreadThread = new readThread(); mreadThread.start(); }else{ Log.d("StartClient","first time join"); startClient = new clientThread(); startClient.start(); } } private class clientThread extends Thread { @Override public void run() { try { Message msg2 = new Message(); msg2.obj = "正在加入"+device.getName()+"的聊天室"; msg2.what = 2; LinkDetectedHandler.sendMessage(msg2); //创建一个Socket连接：只需要服务器在注册时的UUID号 socket = Bluetooth.joinChatRoomSocket.get(address); //连接 socket.connect(); Bluetooth.joinChatRoomSocket.put(address,socket); Bluetooth.joinChatRoom.put(address,true); // new IsNotConnected().start(); //启动接受数据 mreadThread = new readThread(); mreadThread.start(); } catch (IOException e) { Bluetooth.joinChatRoom.put(address,false); Message msg = new Message(); msg.obj = "加入聊天室失败，请断开重试"; msg.what = 2; LinkDetectedHandler.sendMessage(msg); } } }//读取数据
private class readThread extends Thread {
@Override
public void run() {
Log.d("StartClient","read buffer");
byte[] buffer = new byte[1024];
int bytes;
InputStream mmInStream = null;try { mmInStream = Bluetooth.joinChatRoomSocket.get(address).getInputStream(); } catch (IOException e1) { e1.printStackTrace(); } while (true) { try { // Read from the InputStream if ((bytes = mmInStream.read(buffer)) > 0) { byte[] buf_data = new byte[bytes]; for (int i = 0; i < bytes; i++) { buf_data[i] = buffer[i]; } String s = new String(buf_data); Log.d("ReceiveMessage",s+"-------"); if(s.equals("MARLBORO")){ continue; } Message message = new Message(); message.obj = s; message.what = 1; LinkDetectedHandler.sendMessage(message); } } catch (IOException e) { try { mmInStream.close(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } break; } } } } private Handler LinkDetectedHandler = new Handler() { //what = 0发送的消息 //what = 1接受的消息 //what = 2公共消息 @Override public void handleMessage(Message msg) { Log.d("ReceiveMessage", msg.obj + " " + msg.what); SimpleDateFormat formatter = new SimpleDateFormat("yyy-MM-dd HH:mm:ss"); nowTime = formatter.format(new Date(System.currentTimeMillis())); list.add(new ChatListItem((String) msg.obj, nowTime, msg.what)); Log.d("ReceiveMessage","list size"+list.size()); Log.d("ReceiveMessage","adddddddddddd"); mAdapter.notifyDataSetChanged(); mListView.setSelection(list.size() - 1); } }; private void SendMessageHandle(String msg){ Log.d("StartClient","send message"+msg); try { OutputStream outputStream = Bluetooth.joinChatRoomSocket.get(address).getOutputStream(); outputStream.write(msg.getBytes()); } catch (Exception e) {} Message m = new Message(); m.obj = msg; m.what = 0; LinkDetectedHandler.sendMessage(m); } @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub } @Override public void onClick(View arg0) { // TODO Auto-generated method stub } public class joinChatListItem { String message; Integer flag; public joinChatListItem(String msg, Integer f) { message = msg; flag = f; } }}
解决方案
//adapter
package wk.bluetooth;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import wk.bluetooth.StartServer.ChatListItem;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
/**
- Created by wk on 2015/5/4.
*/
public class ChatAdapter extends BaseAdapter {
private ArrayList list;
private LayoutInflater mInflater;public ChatAdapter(Context context, ArrayList l) {
list = l;
mInflater = LayoutInflater.from(context);
}@Override
public int getCount() {
return list.size();
}@Override
public Object getItem(int position) {
return list.get(position);
}@Override
public long getItemId(int position) {
return position;
}@Override
public int getItemViewType(int position) {
return position;
}@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
int[] textView ={R.id.send_text,R.id.receive_text,R.id.receive_text};
int[] imageView = {R.id.send_head_image,R.id.receive_head_image, R.id.receive_head_image};
int[] layout = {R.layout.send_message,R.layout.receive_message, R.layout.receive_message};
Log.d("ChatAdapter","hhhhhhhhhhhhhhhhhhhh");
ChatListItem item=list.get(position);
Log.d("ChatAdapter","item.flag "+item.flag+"item.mes "+item.message);
// if(convertView == null){
Log.d("ChatAdapter","--"+item.message+" -- "+ item.flag);
convertView = mInflater.inflate(layout[item.flag], null);
viewHolder=new ViewHolder(
// convertView.findViewById(R.id.list_child),
(TextView) convertView.findViewById(textView[item.flag])
, (TextView) convertView.findViewById(R.id.message_time)
,(ImageView) convertView.findViewById(imageView[item.flag])
);
convertView.setTag(viewHolder);
//}//else{ // Log.d("ChatAdapter","nullllllllllll"); // viewHolder = (ViewHolder)convertView.getTag(); //} if(item.flag==2){ Log.d("ChatAdapter",item.message+"--"+item.flag); viewHolder.time.setText(item.message); viewHolder.msg.setVisibility(View.GONE); viewHolder.img.setVisibility(View.GONE); }else { viewHolder.msg.setVisibility(View.VISIBLE); viewHolder.img.setVisibility(View.VISIBLE); viewHolder.time.setText(item.time); viewHolder.msg.setText(item.message); } return convertView;}
class ViewHolder {
protected TextView msg;
protected TextView time;
protected ImageView img;public ViewHolder(TextView message, TextView t, ImageView im){ this.msg = message; this.time = t; this.img = im; }}
}
我能收到socket发送的消息，但是我多次调用这个activity后 list没有add数据adapter也没有调用
解决方案二：
只要没有点返回之类的按钮，list应该是不断增大了。先跟踪看看list没有增加的原因吧