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);

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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