package com.tencent; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.ListView; import java.util.ArrayList; import java.util.Calendar; public class ChatActivity extends Activity {   private static final String TAG = ChatActivity.class.getSimpleName();;   private ListView talkView;   private Button messageButton;   private EditText messageText;   // private ChatMsgViewAdapter myAdapter;   private ArrayList<ChatMsgEntity> list = new ArrayList<ChatMsgEntity>();   public void onCreate(Bundle savedInstanceState) {     Log.v(TAG, "onCreate >>>>>>");     super.onCreate(savedInstanceState);     setContentView(R.layout.main);     talkView = (ListView) findViewById(R.id.list);     messageButton = (Button) findViewById(R.id.MessageButton);     messageText = (EditText) findViewById(R.id.MessageText);     OnClickListener messageButtonListener = new OnClickListener() {       @Override       public void onClick(View arg0) {         // TODO Auto-generated method stub         Log.v(TAG, "onclick >>>>>>>>");         String name = getName();         String date = getDate();         String msgText = getText();         int RId = R.layout.list_say_he_item;         ChatMsgEntity newMessage = new ChatMsgEntity(name, date, msgText, RId);         list.add(newMessage);         // list.add(d0);         talkView.setAdapter(new ChatMsgViewAdapter(ChatActivity.this, list));         messageText.setText("");         // myAdapter.notifyDataSetChanged();       }     };     messageButton.setOnClickListener(messageButtonListener);   }   // shuold be redefine in the future   private String getName() {     return getResources().getString(R.string.myDisplayName);   }   // shuold be redefine in the future   private String getDate() {     Calendar c = Calendar.getInstance();     String date = String.valueOf(c.get(Calendar.YEAR)) + "-"         + String.valueOf(c.get(Calendar.MONTH)) + "-" + c.get(c.get(Calendar.DAY_OF_MONTH));     return date;   }   // shuold be redefine in the future   private String getText() {     return messageText.getText().toString();   }   public void onDestroy() {     Log.v(TAG, "onDestroy>>>>>>");     // list = null;     super.onDestroy();   } }

package com.tencent; public class ChatMsgEntity {   private static final String TAG = ChatMsgEntity.class.getSimpleName();   private String name;   private String date;   private String text;   private int layoutID;   public String getName() {     return name;   }   public void setName(String name) {     this.name = name;   }   public String getDate() {     return date;   }   public void setDate(String date) {     this.date = date;   }   public String getText() {     return text;   }   public void setText(String text) {     this.text = text;   }   public int getLayoutID() {     return layoutID;   }   public void setLayoutID(int layoutID) {     this.layoutID = layoutID;   }   public ChatMsgEntity() {   }   public ChatMsgEntity(String name, String date, String text, int layoutID) {    super();     this.name = name;     this.date = date;     this.text = text;     this.layoutID = layoutID;   } }

package com.tencent; import android.content.Context; import android.database.DataSetObserver; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.LinearLayout; import android.widget.TextView; import java.util.ArrayList; public class ChatMsgViewAdapter extends BaseAdapter {   private static final String TAG = ChatMsgViewAdapter.class.getSimpleName();  private ArrayList<ChatMsgEntity> coll;   private Context ctx;   public ChatMsgViewAdapter(Context context, ArrayList<ChatMsgEntity> coll) {    ctx = context;     this.coll = coll;   }   public boolean areAllItemsEnabled() {     return false;   }   public boolean isEnabled(int arg0) {     return false;   }   public int getCount() {     return coll.size();   }   public Object getItem(int position) {     return coll.get(position);   }   public long getItemId(int position) {     return position;   }   public int getItemViewType(int position) {     return position;   }   public View getView(int position, View convertView, ViewGroup parent) {     Log.v(TAG, "getView>>>>>>>");     ChatMsgEntity entity = coll.get(position);     int itemLayout = entity.getLayoutID();     LinearLayout layout = new LinearLayout(ctx);     LayoutInflater vi = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);     vi.inflate(itemLayout, layout, true);     TextView tvName = (TextView) layout.findViewById(R.id.messagedetail_row_name);     tvName.setText(entity.getName());     TextView tvDate = (TextView) layout.findViewById(R.id.messagedetail_row_date);     tvDate.setText(entity.getDate());     TextView tvText = (TextView) layout.findViewById(R.id.messagedetail_row_text);     tvText.setText(entity.getText());     return layout;   }   public int getViewTypeCount() {     return coll.size();   }   public boolean hasStableIds() {     return false;   }   public boolean isEmpty() {     return false;   }   public void registerDataSetObserver(DataSetObserver observer) {   }   public void unregisterDataSetObserver(DataSetObserver observer) {   } }