4.TableLayout、回调接口

会话详情页

listview条目布局

TableLayout是一行几列的意思

<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>

代码：

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() {
		MyQueryHandler

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);
	}
	
}


//回调接口写法：这样就把adapter有回传回来了
		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;
		
	}
	
}

来自为知笔记(Wiz)