我正在底表中填充RecyclerView并将BottomSheet显示为BottomSheetDialogFragment。如果单击了RecyclerView中的某个项目，我想使用该项目的详细信息自动填写表格。
如何将包含数据的类（模型）对象从BottomSheetDialogFragment传递到片段，在该片段上实例化BottomSheetDialogFragment。这是我的代码
我要自动填充字段的片段
public class FormFragment extends Fragment implements onItemSelected {public class fetchSimilarContacts extends AsyncTask<Void, Void, String> {
String result, res, search;
fetchSimilarContacts(String sear){
search = sear;
}
@Override
protected void onPostExecute(String aVoid) {
try {
if (res.equals("200")){
try {
// bring up bottom sheet
bottomSheetDialogFragment = new formBottomSheet();
Bundle bun = new Bundle();
bun.putParcelableArrayList("data", contItems);
bottomSheetDialogFragment.setArguments(bun);
bottomSheetDialogFragment.show(getActivity().getSupportFragmentManager(), bottomSheetDialogFragment.getTag());
}
catch (Exception ex){
ex.printStackTrace();
}
}
else{
Toast.makeText(getActivity().getApplicationContext(), "Could not connect to server", Toast.LENGTH_LONG).show();
}
}
}
}}
我获取数据并使用上面的asynctask函数填充RecyclerView。这是formBottomSheet类
public class formBottomSheet extends BottomSheetDialogFragment{
similarContactAdapter mAdapter;
RecyclerView rec;
ArrayList<hash> contItems;
View v;
onItemSelected itemSelected;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//contItems = new ArrayList<hash>();
if(getArguments() != null){
contItems = getArguments().getParcelableArrayList("data");
}
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
/*return super.onCreateView(inflater, container, savedInstanceState);*/
v = inflater.inflate(R.layout.form_bottomsheet_recyclerview, container, false);
rec = (RecyclerView) v.findViewById(R.id.recycler);
itemSelected = (onItemSelected) getParentFragment();
//contItems = new ArrayList<hash>();
mAdapter = new similarContactAdapter(contItems, getActivity().getApplicationContext(), new similarContactAdapter.onItemClickListener() {
@Override
public void onItemClick(hash hsh) {
//after clicking on an item in the RecyclerView, i get the item's data here, how to i pass the data from here to the Form Fragment where i instantiated the bottom sheet fragment dialog?
Toast.makeText(getActivity().getApplicationContext(), "", Toast.LENGTH_LONG).show();
}
});
final RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getActivity().getApplicationContext());
rec.setLayoutManager(mLayoutManager);
rec.setItemAnimator(new DefaultItemAnimator());
rec.setAdapter(mAdapter);
mAdapter.notifyDataSetChanged();
return v;
}
@Override
public void setupDialog(Dialog dialog, int style) {
super.setupDialog(dialog, style);
}
public interface onItemSelected {
void SendHashItem(hash hsh);
} }
在RecyclerView中单击某个项目后，我在这里获取该项目的数据，如何将数据从此处传递到表单片段，在该片段中实例化了BottomSheetFragmentDialog？
这是我的活动
protected void onCreate(Bundle savedInstanceState) {
try{
super.onCreate(savedInstanceState);
// Hide the status bar.
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_dashboard);
//initialize
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
viewPager = (ViewPager) findViewById(R.id.viewp);
setupViewPager(viewPager);
title = findViewById(R.id.title);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
tabLayout.setSelectedTabIndicatorColor(ContextCompat.getColor(getApplicationContext(), R.color.transparent));
setupTabIcons();
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
View tabView = tab.getCustomView();
// get inflated children Views the icon and the label by their id
TextView tab_label = (TextView) tabView.findViewById(R.id.tab);
// change the label color, by getting the color resource value
tab_label.setTextColor(ContextCompat.getColor(getApplicationContext(), R.color.colorPrimary));
// change the image Resource
// i defined all icons in an array ordered in order of tabs appearances
// call tab.getPosition() to get active tab index.
tab_label.setCompoundDrawablesWithIntrinsicBounds(0, tabIconsActive[tab.getPosition()], 0, 0);
//"#4CAF50");
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
View tabView = tab.getCustomView();
// get inflated children Views the icon and the label by their id
TextView tab_label = (TextView) tabView.findViewById(R.id.tab);
// change the label color, by getting the color resource value
tab_label.setTextColor(ContextCompat.getColor(getApplicationContext(), R.color.white));
// change the image Resource
// i defined all icons in an array ordered in order of tabs appearances
// call tab.getPosition() to get active tab index.
tab_label.setCompoundDrawablesWithIntrinsicBounds(0, tabIcons[tab.getPosition()], 0, 0);
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
tabLayout.setScrollPosition(position, 0 , true);
tabLayout.setSelected(true);
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
viewPager.setCurrentItem(0);
tabLayout.getTabAt(0).select();
setToolbarTitle();
}
catch(Exception e){
e.printStackTrace();
}
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new VideoFragment(), "Video");
adapter.addFragment(new ThreeSixtyFragment(), "360");
adapter.addFragment(new FormFragment(), "Form");
adapter.addFragment(new SettingsFragment(), "Settings");
viewPager.setAdapter(adapter);
}
private void setupTabIcons() {
TextView tabThree = (TextView) LayoutInflater.from(this).inflate(R.layout.cust_tab, null);
tabThree.setText("Video");
tabThree.setTextColor(ContextCompat.getColor(getApplicationContext(), R.color.colorPrimary));
tabThree.setCompoundDrawablesWithIntrinsicBounds(0, R.drawable.ic_video_red, 0, 0);
tabLayout.getTabAt(0).setCustomView(tabThree);
TextView tabTwo = (TextView) LayoutInflater.from(this).inflate(R.layout.cust_tab, null);
tabTwo.setText("360");
tabTwo.setCompoundDrawablesWithIntrinsicBounds(0, R.drawable.ic_360_white, 0, 0);
tabLayout.getTabAt(1).setCustomView(tabTwo);
TextView tabOne = (TextView) LayoutInflater.from(this).inflate(R.layout.cust_tab, null);
tabOne.setText("Form");
tabOne.setCompoundDrawablesWithIntrinsicBounds(0, R.drawable.ic_form_white, 0, 0);
tabLayout.getTabAt(2).setCustomView(tabOne);
TextView tabFive = (TextView) LayoutInflater.from(this).inflate(R.layout.cust_tab, null);
tabFive.setText("Settings");
tabFive.setCompoundDrawablesWithIntrinsicBounds(0, R.drawable.ic_settings_white, 0, 0);
tabLayout.getTabAt(3).setCustomView(tabFive);
}
@Override
public void onFragmentInteraction(Uri uri) {
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
@Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
@Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
答案 0 :(得分：0)
您的FormFragment和formBottomSheet都是生活在同一Activity实例中的片段。
有时一个片段将具有“父”或“子”片段，但此处不是这种情况，因为您的FormFragment使用getActivity().getSupportFragmentManager()来显示底页，而不是getChildFragmentManager() 。完全可以，但是要记住一点。
这意味着formBottomSheet与FormFragment“交谈”的最佳方法是与Activity交谈，然后让Activity传递给FormFragment。 / p>
formBottomSheet-> Activity-> FormFragment
与活动对话非常简单。您只需调用getActivity()并将其强制转换为Activity的类名称即可：
mAdapter = new similarContactAdapter(contItems, getActivity().getApplicationContext(), new similarContactAdapter.onItemClickListener() {
@Override
public void onItemClick(hash hsh) {
MyActivity activity = (MyActivity) getActivity();
activity.onHashItem(hsh);
}
});
在“活动”中，您可以使用FragmentManager获取FormFragment，然后将消息发送给它。这取决于FormFragment具有id（如果您在XML中为其设置了android:id属性，或者如果您使用了replace(R.id.some_id, ...)，则可以使用id）或tag（如果您以XML设置了android:tag属性，或者使用了replace(..., "TAG")，则可以使用标记）。
public void onHashItem(hash hsh) {
FragmentManager fm = getSupportFragmentManager();
// use only one of the two following lines
FormFragment fragment = (FormFragment) fm.findFragmentById(R.id.some_id); // if using id
FormFragment fragment = (FormFragment) fm.findFragmentByTag("TAG"); // if using tag
fragment.onHashItem(hsh);
}
最后，您可以在onHashItem()中创建FormFragment方法：
public void onHashItem(hash hsh) {
// do whatever you want
}