Android UI开发第四篇——实现像handcent sms或者chomp sms那样的气泡短信样式

今晚有点时间把断了很长时间的UI开发补一下，这次实现的是像handcent sms或者chomp sms那样的气泡短信样式，也是iphone上的气泡聊天模式。实现这种效果的重点是ListView的divider和listSelector。先看一下效果图。

给代码：

（1）listview：

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:background="@android:color/white"

<ListView

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:divider="@null"

android:dividerHeight="0dip"

android:cacheColorHint="#00000000"

android:listSelector="@drawable/list_item_style"

android:id="@+id/itemlist" />

</LinearLayout>

（2）ListView item

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="wrap_content"

android:layout_height="wrap_content">

<TextView android:id="@+id/TextView01"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textColor="@android:color/black"

android:background="@drawable/bg"></TextView>

</LinearLayout>

（3）java：

public class HandcentList extends Activity {

/** Called when the activity is first created. */

ListView itemlist = null;

List<Map<String, Object>> list;

final String[] str={"A","B","C","D","E","F"};

/** Called when the activity is first created. */

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

itemlist = (ListView) findViewById(R.id.itemlist);

refreshListItems();

}

private void refreshListItems() {

list = buildListForSimpleAdapter();

SimpleAdapter notes = new SimpleAdapter(this, list, R.layout.item,

new String[] { "str" }, new int[] { R.id.TextView01,});

itemlist.setAdapter(notes);

itemlist.setSelection(0);

}

private List<Map<String, Object>> buildListForSimpleAdapter() {

List<Map<String, Object>> list = new ArrayList<Map<String, Object>>(2);

// Build a map for the attributes

Map<String, Object> map = new HashMap<String, Object>();

map.put("str", "呵呵呵呵呵");

list.add(map);