我有一个项目片段工作正常，我使用actionbarsherlock，以及jeremyfeinstein的滑动菜单，
一切正常， 但是当我想自定义左抽屉列表单元格时，我得到一个例外
的NullPointerException
这是我的代码，
用于显示左表在列表的基本模式下工作正常，simple_list_item_1
但是当我自定义它时，我得到了例外，
此处列表为[PhoneMenuList.java]：
public class PhoneMenuList extends SherlockListFragment{
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
return super.onCreateView(inflater, container, savedInstanceState);
}
@Override
public void onActivityCreated(Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
//SET THE LIST ADAPTER!
Hamburger hambu_data[] = new Hamburger[]
{
new Hamburger(R.drawable.icon_hambu_folder, "My Documents"),
new Hamburger(R.drawable.icon_hambu_favs, "Top 10 viewed"),
new Hamburger(R.drawable.icon_hambu_validate, "Validate"),
new Hamburger(R.drawable.icon_hambu_how, "How to use"),
new Hamburger(R.drawable.icon_hambu_how, "About")
};
ListView productList= (ListView) getActivity().findViewById(R.id.listView1);
//for context!
HamburgerAdapter adapter = new HamburgerAdapter(getActivity(), R.layout.hamburger_item_row, hambu_data);
/*
View header = (View)getLayoutInflater(savedInstanceState).inflate(R.layout.hamburger_item_row, null);
productList.addHeaderView(header);
productList.setAdapter(adapter);
*/
}
}
在list.xml上
<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="#000000"
android:dividerHeight="1dip" />
hamburguer item row
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp">
<ImageView android:id="@+id/imgIcon"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="center_vertical"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:layout_marginRight="15dp"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp" />
<TextView android:id="@+id/txtTitle"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center_vertical"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:textStyle="bold"
android:textSize="22dp"
android:textColor="#000000"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp" />
</LinearLayout>
所以当我设置我的适配器时如何修复异常
productList.setAdapter（适配器）;
谢谢！
编辑1
HamburgerAdapter.java
public class HamburgerAdapter extends ArrayAdapter<Hamburger>{
Context context;
int layoutResourceId;
Hamburger data[] = null;
public HamburgerAdapter(Context context, int layoutResourceId, Hamburger[] data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
WeatherHolder holder = null;
if(row == null)
{
//inflater for fragment!
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new WeatherHolder();
holder.imgIcon = (ImageView)row.findViewById(R.id.imgIcon);
holder.txtTitle = (TextView)row.findViewById(R.id.txtTitle);
row.setTag(holder);
}
else
{
holder = (WeatherHolder)row.getTag();
}
Hamburger hamburger = data[position];
holder.txtTitle.setText(hamburger.title);
holder.imgIcon.setImageResource(hamburger.icon);
return row;
}
static class WeatherHolder
{
ImageView imgIcon;
TextView txtTitle;
}
}
编辑2，
例外，使用时：
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
// return super.onCreateView(inflater, container, savedInstanceState);
View mView = inflater.inflate(R.layout.list, container, false);
return mView;
}
01-01 11:43:27.110: W/dalvikvm(14502): threadid=1: thread exiting with uncaught exception (group=0x410292a0)
01-01 11:43:27.110: E/AndroidRuntime(14502): FATAL EXCEPTION: main
01-01 11:43:27.110: E/AndroidRuntime(14502): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.chocolate.tiks_documents/com.chocolate.tiks_documents.MainActivityPhone}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.app.ActivityThread.access$600(ActivityThread.java:140)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.os.Handler.dispatchMessage(Handler.java:99)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.os.Looper.loop(Looper.java:137)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.app.ActivityThread.main(ActivityThread.java:4898)
01-01 11:43:27.110: E/AndroidRuntime(14502): at java.lang.reflect.Method.invokeNative(Native Method)
01-01 11:43:27.110: E/AndroidRuntime(14502): at java.lang.reflect.Method.invoke(Method.java:511)
01-01 11:43:27.110: E/AndroidRuntime(14502): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
01-01 11:43:27.110: E/AndroidRuntime(14502): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
01-01 11:43:27.110: E/AndroidRuntime(14502): at dalvik.system.NativeStart.main(Native Method)
01-01 11:43:27.110: E/AndroidRuntime(14502): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.support.v4.app.ListFragment.ensureList(ListFragment.java:344)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.support.v4.app.ListFragment.onViewCreated(ListFragment.java:145)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:941)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1460)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:556)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1167)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.app.Activity.performStart(Activity.java:5216)
01-01 11:43:27.110: E/AndroidRuntime(14502): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2073)
01-01 11:43:27.110: E/AndroidRuntime(14502): ... 11 more
答案 0 :(得分：3)
您忘记设置列表项的ID。您的适配器还希望处理有关其包含的数据的委派信息。覆盖getCount()可用于确定您拥有的项目数以及基本适配器应尝试创建的视图数。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/hamburger_item_row"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp">
<ImageView android:id="@+id/imgIcon"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="center_vertical"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:layout_marginRight="15dp"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp" />
<TextView android:id="@+id/txtTitle"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center_vertical"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:textStyle="bold"
android:textSize="22dp"
android:textColor="#000000"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp" />
</LinearLayout>
对于适配器，您需要添加以下内容
@Override
public int getCount() {
return data.size(); //Base adapter needs to now how many items to create
}
答案 1 :(得分：2)
尝试使用以下代码
public class PhoneMenuList extends SherlockFragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View mView = inflater.inflate(R.layout.list, container, false);
return mView;
}