Android自定义适配器-赢得';t返回视图?
我在使用自定义适配器将视图返回到listview时遇到问题。这是我在扩展Fragment的主类中拥有的Android自定义适配器-赢得';t返回视图?,android,listview,fragment,baseadapter,custom-adapter,Android,Listview,Fragment,Baseadapter,Custom Adapter,我在使用自定义适配器将视图返回到listview时遇到问题。这是我在扩展Fragment的主类中拥有的 public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_perfil_config, conta
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_perfil_config, container, false);
ListAdapter adapter = new PerfilOptionsAdapter(listOptions(), getActivity());
listPerfilConfigOptions = (ListView) getActivity().findViewById(R.id.listEvents);
listPerfilConfigOptions.setAdapter(adapter);
return view;
}
下面是我的定制适配器PerfiOptionsAdapter的配置:
public class PerfilOptionsAdapter extends BaseAdapter {
private Activity activity;
private List<PerfilConfigOption> options;
private DateHelper dateHelper = new DateHelper();
public PerfilOptionsAdapter(List<PerfilConfigOption> options, Activity activity) {
this.options = options;
this.activity = activity;
}
@Override
public int getCount() {
return options.size();
}
@Override
public Object getItem(int position) {
return options.get(position);
}
@Override
public long getItemId(int position) {
PerfilConfigOption option = options.get(position);
return option.getOptionID();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = activity.getLayoutInflater();
View line = inflater.inflate(R.layout.perfilconfigoptions_list , null);
PerfilConfigOption option = options.get(position);
TextView optionName = (TextView) line.findViewById(R.id.perfilConfigOptionName);
optionName.setText(option.getOptionName());
//ImageView photo = (ImageView) line.findViewById(R.id.perfilConfigOptionImage);
//photo.setImageBitmap(option.getOptionImage());
return line;
}
}
我不知道为什么这个适配器根本不返回任何视图?我用一个SimpleAdapter用同样的数据试过了,效果很好。我需要创建一个自定义适配器来处理图像数据
任何帮助都将不胜感激。谢谢我猜您是在尝试查找listPerfilConfigOptions,而不是它所在的位置: 请尝试以下代码:
listPerfilConfigOptions=(ListView)view.findViewById(R.id.listEvents)代码>谢谢大家的帮助,错误很简单,没有放置R.id.listPerfilConfigOptions,而是放置了R.id.listEvents。很难说出哪里出了问题,乍一看,您的代码看起来不错。日志中有错误吗?我正在编辑帖子,并添加logcat响应。谢谢你的帮助!如果要更改此选项:listPerfilConfigOptions=(ListView)getActivity().findViewById(R.id.listEvents);对此:view.findviewbyd(R.id.listEvents);这有用吗?@ruan65接得好!我只是在看适配器。如果fragment\u perfil\u config.xml
中的R.id.listEvents
,则findViewById()
将返回null,然后listPerfilConfigOptions.setAdapter()
将导致NullPointerException
。我尝试了这段代码,但没有成功。查看我的调试面板变量ate此链接:(我不想发布image=/),适配器不返回视图。这是我的调试面板变量,用于帮助=d。感谢大家帮助我,错误很简单,而不是放置R.id.listPerfilConfigOptions,而是放置R.id.listEvents。
05-07 19:50:07.677 1730-1730/com.cupdev.voucomo E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.cupdev.voucomo, PID: 1730
java.lang.NullPointerException
at com.cupdev.voucomo.Fragments.PerfilConfigFragment.onCreateView(PerfilConfigFragment.java:37)
at android.app.Fragment.performCreateView(Fragment.java:1700)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:890)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062)
at android.app.BackStackRecord.run(BackStackRecord.java:684)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1447)
at android.app.FragmentManagerImpl$1.run(FragmentManager.java:443)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)