Question

Anhone可以帮助我或为我指明正确的方向吗？从当前表到输出表的最简单方法是什么？

当前表

ID |类型|金额|

2 | A | 19 | | | | | |

2 | B | 6 | | | | | |

3 | A | 5 | | | | | | | | | | |

3 | B | 11 | | | | | |

4 | A | 1的| |

4 | B | 23 | | | | | | |

期望的输出

ID |类型|金额|更改

2 | A | 19 | | | | | | 13 | |

2 | B | 6 | | | | | | | | | | | | -6 -6 | |

3 | A | 5 | | | | | | | | | | | -22

3 | B | 11 | | | | | | |

4 | A | 1的| | |

4 | B | 23 | | | | | | | |

Answer 1

我不知道如何将值放在行上。例如，对于任何给定的ID，您都可以从“ A”值中减去“ B”值。例如：

public class ColorDialogFragment extends DialogFragment {
    private View view;
    private TabLayout tabLayout;
    private ViewPager viewPager;
    private ColorFragmentPagerAdapter colorFragmentPagerAdapter;

    public static ColorDialogFragment newInstance() {
        ColorDialogFragment colorDialogFragment = new ColorDialogFragment();
        return colorDialogFragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public void onResume() {
        super.onResume();
        getDialog().getWindow().setLayout(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);


        // TODO: Read from WeNoteOptions.
        final int position = 0;
        this.viewPager.setCurrentItem(position);
        updateButtonVisibility(position);
    }

    private View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container) {
        View view = inflater.inflate(R.layout.color_dialog_fragment, container, false);

        this.tabLayout = view.findViewById(R.id.tab_layout);
        this.viewPager = view.findViewById(R.id.view_pager);
        this.colorFragmentPagerAdapter = new ColorFragmentPagerAdapter(this.getChildFragmentManager());
        this.viewPager.setAdapter(this.colorFragmentPagerAdapter);
        this.tabLayout.setupWithViewPager(this.viewPager);

        this.viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                updateButtonVisibility(position);
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });

        return view;
    }

    private void updateButtonVisibility(int position) {
        if (position == 1) {
            ((AlertDialog)getDialog()).getButton(DialogInterface.BUTTON_POSITIVE).setVisibility(View.VISIBLE);
        } else {
            ((AlertDialog)getDialog()).getButton(DialogInterface.BUTTON_POSITIVE).setVisibility(View.INVISIBLE);
        }
    }

    // https://stackoverflow.com/questions/20303865/viewpager-in-dialogfragment-illegalstateexception-fragment-does-not-have-a-vi
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return this.view;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        LayoutInflater layoutInflater = getActivity().getLayoutInflater();
        this.view = onCreateView(layoutInflater, null);
        AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(getActivity())
                .setTitle(R.string.select_a_color)
                .setView(this.view)
                .setPositiveButton(R.string.select_color, (dialogInterface, i) -> {

                });
        return alertDialogBuilder.create();
    }
}

将同一列的两个值的差输出到另一列

1 个答案: