Question

我正在使用swipe fragment开发一个应用程序，我的问题是客户端希望如果他们刷视图，其中的数据将自动从sqlite表中保存，例如在视图中有{{ 1}}在向EditText输入值后，当它们滑动到另一个视图或下一个项目时，该值将保存在EditText中。请帮助我

// PagerFragment.java类，我从xml

调用viewpager

sqlite table

// ListviewAdapter.java

public class PagerFragment extends Fragment {

    private List<PageData> data;
    private int currentPosition;

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

        View v = inflater.inflate(R.layout.fragment_pager, container, false);
        ViewPager mViewPager = (ViewPager) v.findViewById(R.id.pager_view);

        currentPosition = getArguments().getInt("CURRENT_POSITION");
        data = getArguments().getParcelableArrayList("DATA_LIST");

        FragmentItemPagerAdapter fragmentItemPagerAdapter = new FragmentItemPagerAdapter(getFragmentManager(), data);
        mViewPager.setAdapter(fragmentItemPagerAdapter);
        mViewPager.setCurrentItem(currentPosition);
        return v;


    }

// FragmentItempagerAdapter.java

public class ListViewAdapter extends ArrayAdapter<PageData> {
    protected List<PageData> data;
    protected LayoutInflater inflater;

    public ListViewAdapter(Activity activity, int textViewResourceId, List<PageData> objects){
        super(activity, textViewResourceId, objects);
        data= objects;
    }

    public View getView(final int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View row = inflater.inflate(R.layout.item_list, parent, false);
        PageData pd = data.get(position);
        TextView tv2 = (TextView)row.findViewById(R.id.cat);
        tv2.setText(pd.getCategory());
//        TextView tv3 = (TextView)row.findViewById(R.id.desc);
//        tv3.setText(pd.getCategory());

        return row;
    }
}

Answer 1

将此方法放入您的片段

 @Override
    public void setMenuVisibility(final boolean visible) {
        super.setMenuVisibility(visible);
        if (!visible) {

          // called when fragment will change

          // insertIntoTable this is a method for insert data into your sqlite table
          insertIntoTable(edittext.getText().toString());

        } 
    }

为sqlite表中的插入数据创建方法insertIntoTable并将其放入sqlite查询中

Answer 2

这是一个简单的例子。希望这有帮助。
这是一个带有公共方法的片段，用于获取edittext字符串 -

?> <?php

}

viewpager的适配器 -

public class TestFragment extends Fragment {
Context mContext;
EditText etData;

public TestFragment() {
    mContext = getActivity();
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_blank, container, false);
    etData = (EditText) view.findViewById(R.id.etData);
    return view;
}

public String getEditTextData(){
   return etData.getText().toString();
}

}

和活动 -

public class Adapter extends FragmentStatePagerAdapter {
SparseArray<Fragment> registeredFragments = new SparseArray<Fragment>();
public Adapter(FragmentManager fm) {
    super(fm);
}

@Override
public Fragment getItem(int position) {
    return new TestFragment();
}

@Override
public int getCount() {
    //create two pages
    return 2;
}

@Override
public Object instantiateItem(ViewGroup container, int position) {
    Fragment fragment = (Fragment) super.instantiateItem(container, position);
    registeredFragments.put(position, fragment);
    return fragment;
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
    registeredFragments.remove(position);
    super.destroyItem(container, position, object);
}

public Fragment getRegisteredFragment(int position) {
    return registeredFragments.get(position);
}

所以逻辑是每当用户刷一次viewpager时，我们从被刷的视图中获取edittext的数据并将其插入到db中。现在要获取片段的edittext数据，我们借助适配器返回特定位置的片段实例。我测试了它，它工作正常！

在滑动片段

2 个答案: