列表视图中的不同图标

Question

我必须创建一个列表视图，每个项目在右侧都有一个单独的图标。我写了一段代码，但它没有用？我该怎么办？ 应用程序崩溃

CODE

public class LoginMenu extends ListActivity
{

TextView maintext, subtext;
QuickContactBadge icon;

private static final String[] menuitems = { "Availability", "Messages",
"Greetings", "Address Book", "Calls", "Settings" };

@Override
protected void onCreate(Bundle savedInstanceState)
{
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.menu);
maintext = (TextView) findViewById(R.id.tvMainText);
subtext = (TextView) findViewById(R.id.tvSubText);
setListAdapter(new IconicAdapter());    
}    
class IconicAdapter extends ArrayAdapter<String>
{    
public IconicAdapter()
{
super(LoginMenu.this, R.layout.menu, R.id.tvMainText, menuitems);
// TODO Auto-generated constructor stub
}   
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
// TODO Auto-generated method stub
View row = super.getView(position, convertView, parent);
icon = (QuickContactBadge) findViewById(R.id.iContactBadge);
if (menuitems[0] != null)
{
icon.setImageResource(R.drawable.menu_availability);
}
else if (menuitems[1] != null)
{
icon.setImageResource(R.drawable.menu_messages);
}    
else if (menuitems[2] != null)
{
icon.setImageResource(R.drawable.menu_greetings);
}
else if (menuitems[3] != null)
{
icon.setImageResource(R.drawable.menu_contacts);    
}
else if (menuitems[4] != null)
{
icon.setImageResource(R.drawable.menu_calls);
}
else if (menuitems[5] != null)
{
icon.setImageResource(R.drawable.menu_settings);
}
return (row);
}    
}
}

IMAGE我的XML文件包含图像，textview和根据下图排列的另一个子文本

logcat的

10-11 04:46:15.088: E/AndroidRuntime(726): FATAL EXCEPTION: main
10-11 04:46:15.088: E/AndroidRuntime(726): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.avst.callxpressmobile/com.example.avst.callxpressmobile.MenuScreen}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
10-11 04:46:15.088: E/AndroidRuntime(726):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
10-11 04:46:15.088: E/AndroidRuntime(726):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
10-11 04:46:15.088: E/AndroidRuntime(726):  at android.app.ActivityThread.access$600(ActivityThread.java:130)
10-11 04:46:15.088: E/AndroidRuntime(726):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
10-11 04:46:15.088: E/AndroidRuntime(726):  at android.os.Handler.dispatchMessage(Handler.java:99)
10-11 04:46:15.088: E/AndroidRuntime(726):  at android.os.Looper.loop(Looper.java:137)
10-11 04:46:15.088: E/AndroidRuntime(726):  at android.app.ActivityThread.main(ActivityThread.java:4745)
10-11 04:46:15.088: E/AndroidRuntime(726):  at java.lang.reflect.Method.invokeNative(Native Method)
10-11 04:46:15.088: E/AndroidRuntime(726):  at java.lang.reflect.Method.invoke(Method.java:511)
10-11 04:46:15.088: E/AndroidRuntime(726):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-11 04:46:15.088: E/AndroidRuntime(726):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-11 04:46:15.088: E/AndroidRuntime(726):  at dalvik.system.NativeStart.main(Native Method)
10-11 04:46:15.088: E/AndroidRuntime(726): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
10-11 04:46:15.088: E/AndroidRuntime(726):  at android.app.ListActivity.onContentChanged(ListActivity.java:243)
10-11 04:46:15.088: E/AndroidRuntime(726):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:259)
10-11 04:46:15.088: E/AndroidRuntime(726):  at android.app.Activity.setContentView(Activity.java:1867)
10-11 04:46:15.088: E/AndroidRuntime(726):  at com.example.avst.callxpressmobile.MenuScreen.onCreate(MenuScreen.java:22)
10-11 04:46:15.088: E/AndroidRuntime(726):  at android.app.Activity.performCreate(Activity.java:5008)
10-11 04:46:15.088: E/AndroidRuntime(726):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
10-11 04:46:15.088: E/AndroidRuntime(726):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
10-11 04:46:15.088: E/AndroidRuntime(726):  ... 11 more

Answer 1

您可以在此处获得简单的代码，该代码在列表的每一行中显示图像和一些文本：

http://www.mkyong.com/android/android-listview-example/

但是如果行数很高，并且如果要从服务器获取每行中的图像，那么最好使用它：

https://github.com/thest1/LazyList

Answer 2

只需使用包含行详细信息的HashMap<String,String>（图片，两个文字）。请参阅此link，它将帮助您实现所需目标。

Answer 3

下面的某些链接对您的相同代码非常有用....

http://www.androidhive.info/2012/02/android-custom-listview-with-image-and-text/

http://wptrafficanalyzer.in/blog/listview-with-images-and-text-using-simple-adapter-in-android/

http://android-example-code.blogspot.in/p/dynamic-custoized-list-view-in-android.html

http://www.softwarepassion.com/android-series-custom-listview-items-and-adapters/

或

   if (menuitems[0] != null) {
              if(menuitems[0].equalsIgnoreCase("Availability")
                {
                    icon.setImageResource(R.drawable.menu_availability);
                 // Set your another textview and another subtext here....
                 }
         } 
  // Set another conditions also as per above code

由于

Answer 4

  

引起：java.lang.RuntimeException：您的内容必须有   ListView的id属性为'android.R.id.list'

您正在使用ListActivity并设置内容setContentView()。 ListActivity默认情况下为ListView，不需要xml布局。但是，如果要提供xml布局，则布局必须具有ListView元素，其id设置为@android:id/list。

关于内容，您始终可以在Menu中填充menu.xml并将其用作数据阵列。幸运的是，每个MenuItem都有一个标题和图标。此外，Menu还有size()和getItem()种方法。