启动对话框以获得结果以将值返回到主活动

Question

我一直试图让我的头脑绕过这几个小时.

我有一个主要的Fragment类,然后从我在该类中的ImageView设置的onClick,我启动一个带有简单的"是"或"取消"选项的Dialog Fragment.

我如何制作它,以便当用户点击"确定"时,它会将结果代码发送回我的主片段,告诉它运行一些代码(在我的情况下,我正在设置壁纸).

这听起来简单但似乎无法弄明白.提前致谢.

Onclick在哪里我想以某种方式将结果返回到:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    final View v = inflater.inflate(R.layout.image_detail_fragment,
            container, false);

    mImageView = (RecyclingImageView) v.findViewById(R.id.imageView);
    mImageView.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {

            MyDialogFragment dialog = new MyDialogFragment();
            dialog.show(getActivity().getFragmentManager(),
                    "MyDialogFragment");

        }

        public void onDialogOKPressed() {

    ((ImageDetailFragment) (DialogFragment.this.getParentFragment()))
                    .onDialogOKPressed();
            dismiss();

        }
    });

    return v;
}

对话类:

class MyDialogFragment extends DialogFragment {
    private Button ButtonOk;
    private Button ButtonCancel;

    public MyDialogFragment() {

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.prompt, container);
        ButtonOk = (Button) view.findViewById(R.id.button1);
        ButtonCancel = (Button) view.findViewById(R.id.button2);
        getDialog().setTitle("Set Wallpaper?");

        ButtonOk.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                                                ((MyDialogFragment)(DialogFragment.this.getActivity())).onDialogOKPressed();
                dismiss();


            }

        });

        ButtonCancel.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                MyDialogFragment.this.dismiss();

            }
        });

        return view;

    }
}

Answer 1

在您的活动中,添加一个响应正在按下的确定按钮的方法,例如public void onDialogOKPressed().然后,在DialogFragment中的OK按钮的onClickListener中,执行以下操作:

public void onClick(View v){
    ((MyActivity)(DialogFragment.this.getActivity())).onDialogOKPressed();
    dismiss();
}

或者将新方法放入主片段中并执行以下操作:

public void onClick(View v){
    ((MyMainFragment)(DialogFragment.this.getParentFragment())).onDialogOKPressed();
    dismiss();
}