将arraylists从片段传递到root活动
我正在为服务员构建订单接收应用程序，其中半页是包含listview的活动布局，一半是viewpager，其中包含片段中的json arraylist。我想在点击+按钮时添加片段中的菜单数据，并在根活动的列表视图中添加数量
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="@+id/My_Container_1_ID"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="140dp"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:contentDescription="@string/app_name"
app:layout_collapseMode="parallax"
android:background="@mipmap/bgactionbar">
<ImageView
android:id="@+id/logo"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginLeft="30dp"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:background="@mipmap/logoapp"
/>
<ImageView
android:id="@+id/triangle"
android:layout_width="280dp"
android:layout_height="100dp"
android:layout_toRightOf="@+id/logo"
android:background="@mipmap/caley"
/>
<RelativeLayout
android:id="@+id/searchLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toRightOf="@+id/triangle"
android:background="#F3EEE8"
android:descendantFocusability="beforeDescendants"
android:focusableInTouchMode="true">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:src="@android:drawable/ic_menu_search"
android:layout_toRightOf="@+id/search_menu"
/>
<EditText
android:id="@+id/search_menu"
android:layout_width="350dp"
android:layout_height="40dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:hint="Search Menu..."
android:textColorHint="@color/tab_text"
android:textColor="@color/tab_text"
android:background="@android:color/transparent"
android:layout_alignParentLeft="true"
android:inputType="textVisiblePassword"/>
</RelativeLayout>
<ImageView
android:id="@+id/coffee"
android:layout_width="110dp"
android:layout_height="140dp"
android:layout_toRightOf="@+id/searchLayout"
android:background="@mipmap/coffee"
android:layout_alignParentRight="true"
/>
</RelativeLayout>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"
style="@style/MyCustomTabLayout"
android:background="@mipmap/background"
app:tabMode="fixed" />
</android.support.design.widget.AppBarLayout>
</FrameLayout>
<RelativeLayout
android:id="@+id/content"
android:layout_width="360dp"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:background="@mipmap/background"
android:layout_below="@id/My_Container_1_ID">
<TextView
android:id="@+id/txtorder"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="Order"
android:textStyle="bold"
android:textColor="@color/tab_text"
android:textSize="20sp" />
<android.support.v7.widget.RecyclerView
android:id="@+id/orderlist"
android:layout_width="340dp"
android:layout_height="match_parent"
android:layout_above="@+id/submit_order"
android:layout_below="@+id/txtorder"
android:background="@mipmap/background"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
<Button
android:id="@+id/submit_order"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignEnd="@+id/orderlist"
android:layout_alignParentBottom="true"
android:layout_alignRight="@+id/orderlist"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:background="#EE6426"
android:textColor="@android:color/white"
android:text="Submit" />
</RelativeLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:layout_below="@+id/My_Container_1_ID"
android:layout_toRightOf="@+id/content"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</RelativeLayout>
public class Menu extends AppCompatActivity implements Coffee.OnMenuInteractionListener {
// private ArrayList<MenuDataModel> allOrders;
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
ListView listView;
RecyclerView recyclerView;
RecyclerAdapter adapter;
// MenuTabAdapter adapter;
// ArrayList<MenuDataModel> allOrders;
private List<MenuDataModel> allOrders = new ArrayList<MenuDataModel>();
// private List<String> orderList = new ArrayList<>();
private String Quantity, Name;
EditText count, inputSearch;
TextView order;
String searchValue;
private ArrayList<String> stringArrayList;
CollapsingToolbarLayout collapsingToolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_menu);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
collapsingToolbar= (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
// collapsingToolbar.setTitle(getString(R.string.app_name));
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
// listView = (ListView) findViewById(R.id.orderlist);
// adapter = new MenuTabAdapter(this, allOrders);
// listView.setAdapter(adapter);
TextView orddd = (TextView) findViewById(R.id.txtorder);
inputSearch = (EditText) findViewById(R.id.search_menu);
// inputSearch.setOnClickListener(new View.OnClickListener() {
// @Override
// public void onClick(View v) {
//
// collapsingToolbar.setVisibility(View.GONE);
//
// }
// });
// recyclerView = (RecyclerView) findViewById(R.id.orderlist);
// recyclerView.setHasFixedSize(true);
// LinearLayoutManager layoutManager = new LinearLayoutManager(this);
// recyclerView.setLayoutManager(layoutManager);
//
// adapter = new RecyclerAdapter(this, allOrders);
// recyclerView.setAdapter(adapter);
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new Coffee(), "Coffee");
adapter.addFragment(new Coffee(), "BreakFast");
adapter.addFragment(new Coffee(), "Beverage");
viewPager.setAdapter(adapter);
}
@Override
public void onFragmentSetOrders(ArrayList<MenuDataModel> menuList) {
allOrders = menuList;
}
@Override
public void onMenuListItemClick(int position) {
//musicService.setSong(position);
MenuDataModel menuorder = allOrders.get(position);
// menuorder.setName(menuorder.getName());
// menuorder.setName(allOrders);
allOrders.add(menuorder);
}
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);
}
}
}
public class Coffee extends Fragment {
ListView listView;
MenusAdapter adapter;
// Movies json url
private static final String url = "url";
private ProgressDialog pDialog;
private List<MenuDataModel> menuList = new ArrayList<MenuDataModel>();
OnMenuInteractionListener menuItemClick;
private String searchData;
private EditText inputSearch;
// Activity activity;
//OnMenuInteractionListener mCallback;
public Coffee() {
// Required empty public constructor
}
public interface OnMenuInteractionListener {
public void onFragmentSetOrders(ArrayList<MenuDataModel> menuList);
public void onMenuListItemClick(int position);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
menuItemClick = (OnMenuInteractionListener) getActivity();
}
@Override
public void onDetach() {
super.onDetach();
menuItemClick = null;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// searchData = getArguments().getString("search");
inputSearch = (EditText) getActivity().findViewById(R.id.search_menu);
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// When user changed the Text
//adapter.getFilter().filter(cs.toString());
if (count < before) {
// We're deleting char so we need to reset the adapter data
adapter.resetData();
}
Coffee.this.adapter.getFilter().filter(s);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
View view = inflater.inflate(R.layout.fragment_coffee, container, false);
listView = (ListView) view.findViewById(R.id.list);
adapter = new MenusAdapter(getActivity(), menuList);
listView.setAdapter(adapter);
pDialog = new ProgressDialog(getActivity());
// Showing progress dialog before making http request
pDialog.setMessage("Loading...");
pDialog.setCancelable(false);
showpDialog();
// Creating volley request obj
JsonObjectRequest bookingReq = new JsonObjectRequest(Request.Method.GET, "" + url + "?", null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d("bsd", response.toString());
// Parsing json
try {
JSONArray menu = response.getJSONArray("menus");
int length = menu.length();
for (int i = 0; i < menu.length(); i++) {
JSONObject obj = menu.getJSONObject(i);
MenuDataModel dm = new MenuDataModel();
// Log.d("vdata", String.valueOf(menu.length()));
dm.setID(obj.getString("id"));
dm.setName(obj.getString("name"));
dm.setThumbnailUrl(obj.getString("photo"));
Log.d("image", String.valueOf(obj.getString("photo")));
dm.setDescription(obj.getString("description"));
dm.setRate(obj.getString("price"));
dm.setStatus(obj.getString("status"));
// adding movie to movies array
menuList.add(dm);
// Log.d("nth", String.valueOf(i));
}
} catch (JSONException e) {
e.printStackTrace();
}
hidepDialog();
// notifying list adapter about data changes
// so that it renders the list view with updated data
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
@SuppressWarnings("deprecation")
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d("b", "Error: " + error.getMessage());
hidepDialog();
}
});
// Adding request to request queue
AppController.getInstance().addToRequestQueue(bookingReq);
return view;
}
private void showpDialog() {
if (!pDialog.isShowing())
pDialog.setMessage("Please wait...");
pDialog.show();
}
private void hidepDialog() {
if (pDialog != null) {
pDialog.dismiss();
pDialog = null;
}
}
}
public class MenusAdapter extends BaseAdapter implements Filterable {
private static final String TAG = MenusAdapter.class.getSimpleName();
List<MenuDataModel> MenuItems;
List<MenuDataModel> mSearchValues;
private android.widget.Filter menufilter;
Coffee.OnMenuInteractionListener mCallback;
//private Activity activity;
ImageLoader imageLoader = AppController.getInstance().getImageLoader();
public MenusAdapter(Activity activity, List<MenuDataModel> MenuItems) {
//this.activity = activity;
this.MenuItems = MenuItems;
this.mSearchValues = MenuItems;
}
@Override
public int getCount() {
return MenuItems.size(); // total number of elements in the list
}
@Override
public Object getItem(int i) {
return MenuItems.get(i); // single item in the list
}
@Override
public long getItemId(int i) {
return i; // index number
}
@Override
public View getView(final int index, View view, final ViewGroup parent) {
if (view == null) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
view = inflater.inflate(R.layout.menu_item, parent, false);
}
// if (imageLoader == null)
// imageLoader = AppController.getInstance().getImageLoader();
final ImageView increase = (ImageView) view.findViewById(R.id.icon_increase);
ImageView decrease = (ImageView) view.findViewById(R.id.icon_decrease);
final EditText count = (EditText) view.findViewById(R.id.count_menu);
NetworkImageView thumbnailUrl = (NetworkImageView) view.findViewById(R.id.menu_image);
TextView name = (TextView) view.findViewById(R.id.menu_items);
// TextView description = (TextView) view.findViewById(R.id.description);
// TextView rate = (TextView) view.findViewById(R.id.price);
final MenuDataModel data = MenuItems.get(index);
name.setText(String.valueOf(data.getName()));
thumbnailUrl.setImageUrl(data.getThumbnailUrl(), imageLoader);
thumbnailUrl.setDefaultImageResId(R.mipmap.logoapp);
thumbnailUrl.setErrorImageResId(R.mipmap.logoapp);
// description.setText(String.valueOf(data.getDescription()));
// title.setText(data.getTitle());
// rate.setText(String.valueOf(data.getRate()));
// final double dis = Double.valueOf(data.getRate());
final int[] quantity = {MenuItems.get(index).getAnInt()};
increase.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//Toast.makeText(parent.getContext(), "Button Clicked"+ dataModel.getName(),Toast.LENGTH_LONG).show();
//Intent yes= new Intent(parent.getContext(), yes(dataModel.getName().class));
quantity[0]++;
count.setText(quantity[0] + "");
count.setTag(quantity[0] + "");
// mCallback.onFragmentSetOrders(all);
mCallback.onMenuListItemClick(MenuItems.get(index).getAnInt());
// Coffee.OnMenuInteractionListener listener = (Coffee.OnMenuInteractionListener) activit;
// mCallback.onFragmentSetOrders(menu);
// Bundle bundle = new Bundle();
// bundle.putString("quantity", quantity[0] + "");
// bundle.putString("name", String.valueOf(data.getName()));
// q.putExtra("bookingid", dataModel.getbkid());
// parent.getContext().startActivity(q);
}
});
decrease.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
count.getTag();
count.setTag(quantity[0] + "");
quantity[0]--;
count.setText(quantity[0] + "");
}
});
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
}
});
return view;
}
@Override
public Filter getFilter() {
if (menufilter == null)
menufilter = new MenuFilter();
return menufilter;
}
public void resetData() {
MenuItems = mSearchValues;
}
private class MenuFilter extends android.widget.Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
// We implement here the filter logic
if (constraint == null || constraint.length() == 0) {
// No filter implemented we return all the list
results.values = mSearchValues;
results.count = mSearchValues.size();
} else {
// We perform filtering operation
List<MenuDataModel> nDriverList = new ArrayList<MenuDataModel>();
for (MenuDataModel p : MenuItems) {
if (p.getName().toUpperCase().startsWith(constraint.toString().toUpperCase()))
nDriverList.add(p);
}
results.values = nDriverList;
results.count = nDriverList.size();
}
return results;
}
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
// Now we have to inform the adapter about the new list filtered
if (results.count == 0)
notifyDataSetInvalidated();
else {
MenuItems = (List<MenuDataModel>) results.values;
notifyDataSetChanged();
}
}
}
;
}
1 个答案:
答案 0 :(得分：1)
第1步：创建界面
public interface ActivityCommunicator{
public void passDataToActivity(ArrayList<string> arrayList);
}
步骤2：初始化片段类中的接口对象
private ActivityCommunicator activityCommunicator;;
public void onAttach(Activity activity)
{
super.onAttach(activity);
context = getActivity();
activityCommunicator =(ActivityCommunicator)context;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
init();
}
public void init() {
activityButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
activityCommunicator.passDataToActivity("Your Array List");
}
});
}
第3步：从活动类中的片段访问您的arraylist。
public class MainActivity extends FragmentActivity implements ActivityCommunicator{
public static ArrayList<String> aList;
@Override
public void passDataToActivity(ArrayList<String> arrayList){
aList = arrayList;
}
}
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