自定义对话框,其中包含单选列表项

Question

我创建了一个带有单选列表项的Dialog:

final CharSequence[] items = {"Red", "Green", "Blue"};

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Colors");
builder.setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int item) {
                Toast.makeText(getApplicationContext(), items[item], Toast.LENGTH_SHORT).show();
            }
        });
AlertDialog alert = builder.create();
alert.show();

如何自定义此对话框的布局,以便对话框中的每个列表项都包含图标和文本.如何在对话框中为列表创建自定义布局？

Answer 1

创建自定义对话框的步骤:

1. 创建对话框布局文件,如:

   <RelativeLayout xmlns:android = "http://schemas.android.com/apk/res/android"
   android:layout_width = "wrap_content"
   android:layout_height = "wrap_content">
   <!-- The Title Bar -->
   <LinearLayout
       android:id="@+id/dlg_priority_titlebar"
       android:orientation="horizontal"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:layout_alignParentTop="true">
   
       <ImageView
           android:src="@drawable/image"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:layout_margin="5dip" />
   
       <TextView
           android:layout_width = "wrap_content"
               android:layout_height = "wrap_content"
               android:text = "Select Task Priority"
               android:layout_gravity = "center_vertical" />
   </LinearLayout>
   <ListView 
       android:id="@+id/dlg_priority_lvw"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_below="@+id/dlg_priority_titlebar"
       android:background="@drawable/layout_home_bg">
   </ListView>
   

2. 因为在ListView自定义布局,所以要创建一个布局文件ListView:

   <LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" 
       android:orientation = "horizontal" 
       android:layout_width = "fill_parent" 
       android:layout_height = "fill_parent"> 
   
   <ImageView 
         android:id = "@+id/list_priority_img" 
         android:layout_width = "wrap_content" 
         android:layout_height = "wrap_content" 
         android:layout_gravity = "center_vertical" 
         android:layout_margin = "5dip" /> 
   <TextView 
        android:id = "@+id/list_priority_value" 
        android:layout_width = "wrap_content" 
        android:layout_height = "wrap_content" 
        android:layout_gravity = "center_vertical" 
        android:textsize = "28dip" 
        android:textColor = "@drawable/ black" /> 
   </LinearLayout>
   

3. 创建继承自的自定义Dialog类PriorityDlgDialog

   公共类PriorityDlg扩展Dialog {

   private Context context;
   private ListView dlg_priority_lvw = null;
   public PriorityDlg(Context context) {
       super(context);
       this.context = context;
       // TODO Auto-generated constructor stub
   }
   public PriorityDlg(Context context, int theme) {
       super(context, theme);
       this.context = context;
   }
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       // TODO Auto-generated method stub
       super.onCreate(savedInstanceState);
       this.setContentView(R.layout.dlg_priority);
       dlg_priority_lvw = (ListView) findViewById(R.id.dlg_priority_lvw);
       // ListView
       SimpleAdapter adapter = new SimpleAdapter(context, getPriorityList(),
               R.layout.lvw_priority, new String[] { "list_priority_img",
                       "list_priority_value" }, new int[] {
                       R.id.list_priority_img, R.id.list_priority_value });
       dlg_priority_lvw.setAdapter(adapter);
       //ListView
       dlg_priority_lvw
               .setOnItemClickListener(new AdapterView.OnItemClickListener() {
   
                   @Override
                   public void onItemClick(AdapterView<?> arg0, View arg1,
                           int arg2, long arg3) {
   
                   }
               });
   }
   private List<HashMap<String, Object>> getPriorityList() {
       List<HashMap<String, Object>> priorityList = new ArrayList<HashMap<String, Object>>();
       HashMap<String, Object> map1 = new HashMap<String, Object>();
       map1.put("list_priority_img", R.drawable.priority_not_important);
       map1.put("list_priority_value", context.getResources().getString(
               R.string.dlg_priority_not_important));
       priorityList.add(map1);
       HashMap<String, Object> map2 = new HashMap<String, Object>();
       map2.put("list_priority_img", R.drawable.priority_general);
       map2.put("list_priority_value", context.getResources().getString(
               R.string.dlg_priority_general));
       priorityList.add(map2);
       HashMap<String, Object> map3 = new HashMap<String, Object>();
       map3.put("list_priority_img", R.drawable.priority_important);
       map3.put("list_priority_value", context.getResources().getString(
               R.string.dlg_priority_important));
       priorityList.add(map3);
       HashMap<String, Object> map4 = new HashMap<String, Object>();
       map4.put("list_priority_img", R.drawable.priority_very_important);
       map4.put("list_priority_value", context.getResources().getString(
               R.string.dlg_priority_very_important));
       priorityList.add(map4);
   
       return priorityList;
   }
   

   }

4. 创建自定义对话框

   PriorityDlg dlg = new PriorityDlg (SimpleTaskActivity.this, R.style.dlg_priority); 
   dlg.show();
   

在R.style.dlg_priority设置对话框的地方使用样式文件,只需让对话框删除标题栏,当然你可以编写代码来完成这个效果:

<? Xml version = "1.0" encoding = "utf-8"?> 
<resources> 
    <style name="dlg_priority" parent="@android:Theme.Dialog"> 
        <item name = "android: windowNoTitle"> true </ item> 
    </ style> 
</ resources>