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 attributesMap<String, Object> map = new HashMap<String, Object>();map.put("str", "呵呵呵呵呵");list.add(map);map = new HashMap<String, Object>();map.put("str", "呵呵");list.add(map);
map = new HashMap<String, Object>();map.put("str", "呵呵呵呵呵呵呵呵呵呵呵呵呵呵呵呵呵");list.add(map);map = new HashMap<String, Object>();map.put("str", "呵呵呵呵呵呵");list.add(map);map = new HashMap<String, Object>();map.put("str", "呵呵呵呵呵呵呵呵呵呵\n呵呵呵呵\n呵呵\n呵呵");list.add(map);map = new HashMap<String, Object>();map.put("str", "呵呵呵呵呵呵呵呵呵呵呵呵呵呵\n呵呵呵呵");list.add(map);return list;}} <?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_selected="true"
android:drawable="@android:color/transparent" />
<item android:state_pressed="true" android:state_selected="false"
android:drawable="@android:color/transparent" />
<item android:state_selected="false"
android:drawable="@android:color/white" />
</selector>
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* @author 张兴业
* android开发进阶群：241395671
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