4.TableLayout、回调接口

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >
 <!--   android:shrinkColumns="0" 压缩第0列，当第0列的内容过多时，不至于将其他列的内容，挤出屏幕 -->
 <TableLayout
        android:id="@+id/tl_receive"
        android:layout_width="match_parent"
        android:shrinkColumns="0"
        android:layout_height="wrap_content" >
 <TableRow android:layout_height="wrap_content" >
 <TextView
                android:id="@+id/tv_msg_receive"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/receive_msg_bubble"
                android:text="asdfasdfasdfasdfasdfsdfadfadfasdfasfsdfadffad" />
 <TextView
                android:id="@+id/tv_date_receive"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:gravity="bottom"
                android:text="2014/10/10" />
 </TableRow>
 </TableLayout>
 <!--   android:shrinkColumns="1" 压缩第0列，当第0列的内容过多时，不至于将其他列的内容，挤出屏幕 -->
 <TableLayout
        android:id="@+id/tl_send"
        android:layout_width="match_parent"
        android:shrinkColumns="1"
        android:layout_height="wrap_content" >
 <TableRow android:layout_height="wrap_content" 
            android:gravity="right">
 <TextView
                android:id="@+id/tv_date_send"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:gravity="bottom"
                android:text="2014/10/10" />
 <TextView
                android:id="@+id/tv_msg_send"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/send_msg_bubble"
                android:text="sfsdfadadsadsfasdfadfffad" />
 </TableRow>
 </TableLayout>
<!-- 另一种实现 方式 -->
<!-- <LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="right"
 >
 <LinearLayout 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
 >
 <TextView
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:gravity="bottom"
                android:text="2014/10/10" />
 <TextView
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="2"
                android:background="@drawable/send_msg_bubble"
                android:text="asdfdf" />
 </LinearLayout>
 </LinearLayout> -->
</LinearLayout>

public class ConversationDetail extends Activity implements OnClickListener{
 /**
	 *联系人的电话号码 
	 */
 private String address;
 private Context ctx;
 private ListView listView;
 private EditText inputMsg;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
		ctx = this;
		address = getIntent().getStringExtra("address");
 if(address == null){
 throw new RuntimeException("联系人是空，我不知道显示哪个会话记录");
 }
		setContentView(R.layout.activity_conversation_detail);
		init();
		listView = (ListView) findViewById(R.id.lv_conversation_detail);
		adapter = new MyListAdapter(this, null);
		listView.setAdapter(adapter);
 //设置listView条目之间的分隔线为null ，即，不要分隔线
		listView.setDivider(null);
		prepareData();
 }
 private void prepareData() {

public class MyQueryHandler extends AsyncQueryHandler{
 public MyQueryHandler(ContentResolver cr) {
 super(cr);
 }
 @Override
 protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
 System.out.println("onQueryComplete : token:"+token);
 System.out.println("onQueryComplete : cookie:"+cookie);
 Tools.printCursor(cursor);
 if(cookie!=null && cookie instanceof CursorAdapter){
 CursorAdapter adapter = (CursorAdapter) cookie;
 // 给adapter 设置新的cursor
			adapter.changeCursor(cursor);
 }
 if(cursorChangedListener!=null){
			cursorChangedListener.onCursorChanged(token, cookie, cursor);
 }
 }
public IOnCursorChangedListener getCursorChangedListener() {
 return cursorChangedListener;
 }
 public void setOnCursorChangedListener(IOnCursorChangedListener cursorChangedListener) {
 this.cursorChangedListener = cursorChangedListener;
 }
 private IOnCursorChangedListener cursorChangedListener;
 /**
	 * 声明，cursor改变时的监听接口
	 * @author Administrator
	 *
	 */
 public interface IOnCursorChangedListener{
 void onCursorChanged(int token, Object cookie, Cursor cursor);
 }
}

 MyQueryHandler myQueryHandler = new MyQueryHandler(getContentResolver());
		myQueryHandler.setOnCursorChangedListener(new MyQueryHandler.IOnCursorChangedListener() {
 @Override
 /**
			 *  当adapter 获得 cursor 的时候，回调此方法 
			 */
 public void onCursorChanged(int token, Object cookie, Cursor cursor) {
 // 让listview 显示最后一行
				listView.setSelection(adapter.getCount()-1);
 }
 });
		myQueryHandler.startQuery(99, adapter, MyConstants.URI_SMS, projection, " address="+address, null, " date ");
 }
 /**
	 * 显示会话详情，所需要的列
	 */
 private String[] projection={
 "_id","body","date","type"
 };
 /**
	 * 短信内容所在列的索引值  为 1
	 */
 private final int INDEX_BODY = 1;
 private final int INDEX_DATE = 2;
 private final int INDEX_TYPE = 3;
 private void init() {
 TextView title = (TextView) findViewById(R.id.tv_title_conversation_detail);
 String name = Tools.findNameByNumber(ctx, address);
 if(name !=null){ // 有此联系人
			title.setText(name);
 }else{ // 无此联系人
			title.setText(address);
 }
		findViewById(R.id.btn_back).setOnClickListener(this);
		findViewById(R.id.btn_ok).setOnClickListener(this);
		inputMsg = (EditText) findViewById(R.id.et_input_msg_conversation_detail);
 }
 @Override
 /**
	 * 响应按钮的点击事件
	 */
 public void onClick(View v) {
 switch (v.getId()) {
 case R.id.btn_back: // 后退按钮
			finish();
 break;
 case R.id.btn_ok: // 确定按钮
 //先判断输入的是否有内容，
 //如果有内容的话，就将内容以短信的形式发送出去，
 String msg = inputMsg.getText().toString();
 if(TextUtils.isEmpty(msg.trim())){
 Toast.makeText(ctx, "请输入短信内容", 0).show();
 return ;
 }
 // 发送短信
 Tools.sendMessage(ctx,msg,address);
 //清空输入框
			inputMsg.setText("");
 // 隐藏输入法键盘
 InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 // 隐藏输入法的 API 
			imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
 break;
 }
 }
 private MyListAdapter adapter;
 private class MyListAdapter extends CursorAdapter{
 public MyListAdapter(Context context, Cursor c) {
 super(context, c);
 }
 @Override
 /**
		 * 当内容发生改变的时候，回调此方法
		 */
 protected void onContentChanged() {
 // super 里面，做了重新查询的动作
 super.onContentChanged();
 // 让listView 显示最后一行
			listView.setSelection(getCount()-1);
 }
 @Override
 public View newView(Context context, Cursor cursor, ViewGroup parent) {
 View view =View.inflate(ctx, R.layout.list_item_conversation_detail, null);
 ViewHolder vh = new ViewHolder();
			vh.tlReceive = (TableLayout) view.findViewById(R.id.tl_receive);
			vh.msgReceive = (TextView) view.findViewById(R.id.tv_msg_receive);
			vh.dateReceive = (TextView) view.findViewById(R.id.tv_date_receive);
			vh.tlSend = (TableLayout) view.findViewById(R.id.tl_send);
			vh.msgSend = (TextView) view.findViewById(R.id.tv_msg_send);
			vh.dateSend = (TextView) view.findViewById(R.id.tv_date_send);
			view.setTag(vh);
 return view;
 }
 @Override
 public void bindView(View view, Context context, Cursor cursor) {
 ViewHolder vh = (ViewHolder) view.getTag();
 // 给listView条目设置内容
 int type = cursor.getInt(INDEX_TYPE);// 获得短信类型
 String text = cursor.getString(INDEX_BODY);//获得短信内容
 long when = cursor.getLong(INDEX_DATE);// 获得日期
 String dateStr = DateFormat.getDateFormat(ctx).format(when);
 if(type == MyConstants.TYPE_RECEIVE){ // 接收到的短信
				vh.tlReceive.setVisibility(View.VISIBLE);
				vh.tlSend.setVisibility(View.GONE);
 //设置短信内容
				vh.msgReceive.setText(text);
 //设置日期
				vh.dateReceive.setText(dateStr);
 }else{
				vh.tlReceive.setVisibility(View.GONE);
				vh.tlSend.setVisibility(View.VISIBLE);
 //设置短信内容
				vh.msgSend.setText(text);
				vh.dateSend.setText(dateStr);
 }
 }
 }
 private class ViewHolder {
 public TableLayout tlReceive;
 public TextView msgReceive;
 public TextView dateReceive;
 public TableLayout tlSend;
 public TextView msgSend;
 public TextView dateSend;
 }
}