我正在我的应用程序中创建一个视图寻呼机,并使用一个扩展Fragment的类.当我创建一个实例时,我可以传递所有元素(图像,文本等)并将其与Bundle一起存储,以便在onCreate中使用它.但我无法在片段中存储按钮的监听器.这是我的班级：
public class RegWizardFragmentInfo extends Fragment {
private static final String IMAGE = "image";
private static final String TEXT = "text";
private static final String BUTTON = "buttonText";
private View.OnClickListener buttonCallBack;
private Button button;
private int image;
private int text;
private int buttonText;
public RegWizardFragmentInfo newInstance(int image,int text,int buttonText,View.OnClickListener callback) {
RegWizardFragmentInfo fragment = new RegWizardFragmentInfo();
Bundle bundle = new Bundle();
bundle.putInt(IMAGE,image);
bundle.putInt(BUTTON,buttonText);
bundle.putInt(TEXT,text);
fragment.setArguments(bundle);
fragment.setRetainInstance(true);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.onActivityCreated(savedInstanceState);
this.image = getArguments().getInt(IMAGE);
this.text = (getArguments() != null) ? getArguments().getInt(TEXT)
: -1;
this.buttonText = (getArguments() != null) ? getArguments().getInt(BUTTON)
: -1;
}
@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
ViewGroup rootView = (ViewGroup) inflater.inflate(
R.layout.fragment,container,false);
//Extract all the views and add the image and texts
return rootView;
}
那么,我如何将我在newInstance中获得的监听器存储到onCreateView方法的按钮上呢？
谢谢您的帮助.
解决方法
您可以在片段中使用回调：
public class RegWizardFragmentInfo extends Fragment {
private Button button;
private OnClickCallback callback;
public interface OnClickCallback {
void onClick();
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
callback = (OnClickCallback) context;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater,@Nullable ViewGroup container,@Nullable Bundle savedInstanceState) {
return super.onCreateView(inflater,savedInstanceState);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
callback.onClick();
}
});
}
}
并在您的父Activity中实现此新接口
