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在我的 NavigationDrawerFragment.java
我有这个代码
expListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
String header = listDataHeader.get(groupPosition);
Category child = listDataChild.get(header).get(childPosition);
// child.name to get the name
// child.id to get the id
//Toast.makeText(getActivity(),"ChildNme: "+child.name+" ChildId: "+child.id, Toast.LENGTH_SHORT).show();
selectItem(1);
return false;
}
});
点击子项后,我将 selectItem 设置为 1
selectItem(1) 将转到 MainActivity.java
public void onNavigationDrawerItemSelected(int position) {
// update the main content by replacing fragments
FragmentManager fragmentManager = getFragmentManager();
// NEW STUFF
if(position == 1){
fragmentManager.beginTransaction()
.replace(R.id.container, CategoryFragment.newInstance())
.commit();
}
}
我的问题是如何将 child.name 和 child.id 从 NavigationDrawerFragment.java 传递到 MainActivity.java 然后传递到 CategoryFragment?
或任何其他将 child.name 和 child.id 传递给 CategoryFragment 的解决方案。
完整代码
NavigationDrawerFragment.java
package com.example.administrator.mosbeau;
import android.app.FragmentManager;
import android.os.AsyncTask;
import android.support.v7.app.ActionBarActivity;
import android.app.Activity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ExpandableListView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
/**
* Fragment used for managing interactions for and presentation of a navigation drawer.
* See the <a href="https://developer.android.com/design/patterns/navigation-drawer.html#Interaction">
* design guidelines</a> for a complete explanation of the behaviors implemented here.
*/
public class NavigationDrawerFragment extends Fragment {
/**
* Remember the position of the selected item.
*/
private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position";
/**
* Per the design guidelines, you should show the drawer on launch until the user manually
* expands it. This shared preference tracks this.
*/
private static final String PREF_USER_LEARNED_DRAWER = "navigation_drawer_learned";
/**
* A pointer to the current callbacks instance (the Activity).
*/
private NavigationDrawerCallbacks mCallbacks;
/**
* Helper component that ties the action bar to the navigation drawer.
*/
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private ListView mDrawerListView;
private View mFragmentContainerView;
private int mCurrentSelectedPosition = 0;
private boolean mFromSavedInstanceState;
private boolean mUserLearnedDrawer;
String myJSON;
private static final String TAG_RESULTS="result";
private static final String TAG_ID = "categories_id";
private static final String TAG_NAME = "categories_name";
JSONArray categories = null;
public NavigationDrawerFragment() {
}
Boolean InternetAvailable = false;
Seocnd detectconnection;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Read in the flag indicating whether or not the user has demonstrated awareness of the
// drawer. See PREF_USER_LEARNED_DRAWER for details.
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity());
mUserLearnedDrawer = sp.getBoolean(PREF_USER_LEARNED_DRAWER, false);
if (savedInstanceState != null) {
mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION);
mFromSavedInstanceState = true;
}
// Select either the default item (0) or the last selected item.
selectItem(mCurrentSelectedPosition);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// Indicate that this fragment would like to influence the set of actions in the action bar.
setHasOptionsMenu(true);
}
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
List<String> listDataHeader;
HashMap<String, List<Category>> listDataChild;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View fragmentView = inflater.inflate(
R.layout.fragment_navigation_drawer, container, false);
/*mDrawerListView = (ListView) fragmentView.findViewById(R.id.listView);
//mDrawerListView = (ListView) inflater.inflate(
//R.layout.fragment_navigation_drawer, container, false);
mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
});
mDrawerListView.setAdapter(new ArrayAdapter<String>(
getActionBar().getThemedContext(),
android.R.layout.simple_list_item_activated_1,
android.R.id.text1,
new String[]{
getString(R.string.title_home),
getString(R.string.title_category),
getString(R.string.title_myaccount),
getString(R.string.title_referafriend),
getString(R.string.title_about),
getString(R.string.title_privacypocity),
getString(R.string.title_shippingterms),
getString(R.string.title_contactus),
}));
mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);*/
// get the listview
expListView = (ExpandableListView) fragmentView.findViewById(R.id.lvExp);
// preparing list data
//prepareListData();
detectconnection = new Seocnd(getActivity());
InternetAvailable = detectconnection.InternetConnecting();
if (InternetAvailable) {
getData();
} else {
selectItem(100);
}
return fragmentView;
}
public void getData(){
class GetDataJSON extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
DefaultHttpClient httpclient = new DefaultHttpClient(new BasicHttpParams());
HttpPost httppost = new HttpPost("http://joehamirbalabadan.com/android/android/categories.php");
// Depends on your web service
httppost.setHeader("Content-type", "application/json");
InputStream inputStream = null;
String result = null;
try {
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
inputStream = entity.getContent();
// json is UTF-8 by default
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
result = sb.toString();
} catch (Exception e) {
// Oops
}
finally {
try{if(inputStream != null)inputStream.close();}catch(Exception squish){}
}
return result;
}
@Override
protected void onPostExecute(String result){
myJSON=result;
prepareListData();
listAdapter = new ExpandableListAdapter(getActivity(), listDataHeader, listDataChild);
// setting list adapter
expListView.setAdapter(listAdapter);
// Listview Group click listener
expListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
/*Toast.makeText(getActivity(),
"Group Clicked " + listDataHeader.get(groupPosition),
Toast.LENGTH_SHORT).show();*/
if(groupPosition == 1){
return false;
} else {
selectItem(groupPosition);
return true;
}
}
});
// Listview on child click listener
expListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
String header = listDataHeader.get(groupPosition);
Category child = listDataChild.get(header).get(childPosition);
// child.name to get the name
// child.id to get the id
Toast.makeText(getActivity(),"ChildNme: "+child.name+" ChildId: "+child.id, Toast.LENGTH_SHORT).show();
//selectItem(1);
return false;
}
});
}
}
GetDataJSON g = new GetDataJSON();
g.execute();
}
protected void prepareListData(){
try {
JSONObject jsonObj = new JSONObject(myJSON);
categories = jsonObj.getJSONArray(TAG_RESULTS);
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<Category>>();
// Adding group data
listDataHeader.add("HOME");
listDataHeader.add("CATEGORY");
listDataHeader.add("MY ACCOUNT");
listDataHeader.add("REFER A FRIEND");
listDataHeader.add("ABOUT");
listDataHeader.add("PRIVACY POLICY");
listDataHeader.add("SHIPPING TERMS");
listDataHeader.add("CONTACT US");
List<Category> CATEGORY = new ArrayList<Category>();
for(int i=0;i<categories.length();i++){
JSONObject c = categories.getJSONObject(i);
Category category = new Category();
category.name = c.getString(TAG_NAME);
category.id = c.getString(TAG_ID);
CATEGORY.add(category);
}
listDataChild.put(listDataHeader.get(1), CATEGORY); // Header, Child data
} catch (JSONException e) {
e.printStackTrace();
}
}
/*
* Preparing the list data
*/
/*private void prepareListData() {
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
// Adding group data
listDataHeader.add("HOME");
listDataHeader.add("CATEGORY");
listDataHeader.add("MY ACCOUNT");
listDataHeader.add("REFER A FRIEND");
listDataHeader.add("ABOUT");
listDataHeader.add("PRIVACY POLICY");
listDataHeader.add("SHIPPING TERMS");
listDataHeader.add("CONTACT US");
// Adding child data
List<String> CATEGORY = new ArrayList<String>();
CATEGORY.add("Category 1");
CATEGORY.add("Category 2");
CATEGORY.add("Category 3");
CATEGORY.add("Category 4");
CATEGORY.add("Category 5");
listDataChild.put(listDataHeader.get(1), CATEGORY); // Header, Child data
}*/
public boolean isDrawerOpen() {
return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView);
}
/**
* Users of this fragment must call this method to set up the navigation drawer interactions.
*
* @param fragmentId The android:id of this fragment in its activity's layout.
* @param drawerLayout The DrawerLayout containing this fragment's UI.
*/
public void setUp(int fragmentId, DrawerLayout drawerLayout) {
mFragmentContainerView = getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
// set a custom shadow that overlays the main content when the drawer opens
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
// set up the drawer's list view with items and click listener
ActionBar actionBar = getActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeButtonEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions
// between the navigation drawer and the action bar app icon.
mDrawerToggle = new ActionBarDrawerToggle(
getActivity(), /* host Activity */
mDrawerLayout, /* DrawerLayout object */
R.string.navigation_drawer_open, /* "open drawer" description for accessibility */
R.string.navigation_drawer_close /* "close drawer" description for accessibility */
) {
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
if (!isAdded()) {
return;
}
getActivity().supportInvalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (!isAdded()) {
return;
}
if (!mUserLearnedDrawer) {
// The user manually opened the drawer; store this flag to prevent auto-showing
// the navigation drawer automatically in the future.
mUserLearnedDrawer = true;
SharedPreferences sp = PreferenceManager
.getDefaultSharedPreferences(getActivity());
sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply();
}
getActivity().supportInvalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
};
// If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer,
// per the navigation drawer design guidelines.
if (!mUserLearnedDrawer && !mFromSavedInstanceState) {
mDrawerLayout.openDrawer(mFragmentContainerView);
}
// Defer code dependent on restoration of previous instance state.
mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mDrawerToggle.syncState();
}
});
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
private void selectItem(int position) {
mCurrentSelectedPosition = position;
if (mDrawerListView != null) {
mDrawerListView.setItemChecked(position, true);
}
if (mDrawerLayout != null) {
mDrawerLayout.closeDrawer(mFragmentContainerView);
}
if (mCallbacks != null) {
mCallbacks.onNavigationDrawerItemSelected(position);
}
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mCallbacks = (NavigationDrawerCallbacks) activity;
} catch (ClassCastException e) {
throw new ClassCastException("Activity must implement NavigationDrawerCallbacks.");
}
}
@Override
public void onDetach() {
super.onDetach();
mCallbacks = null;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Forward the new configuration the drawer toggle component.
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
// If the drawer is open, show the global app actions in the action bar. See also
// showGlobalContextActionBar, which controls the top-left area of the action bar.
if (mDrawerLayout != null && isDrawerOpen()) {
inflater.inflate(R.menu.global, menu);
showGlobalContextActionBar();
}
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
if (item.getItemId() == R.id.action_example) {
Toast.makeText(getActivity(), "Example action.", Toast.LENGTH_SHORT).show();
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* Per the navigation drawer design guidelines, updates the action bar to show the global app
* 'context', rather than just what's in the current screen.
*/
private void showGlobalContextActionBar() {
ActionBar actionBar = getActionBar();
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
actionBar.setTitle(R.string.app_name);
}
private ActionBar getActionBar() {
return ((ActionBarActivity) getActivity()).getSupportActionBar();
}
/**
* Callbacks interface that all activities using this fragment must implement.
*/
public static interface NavigationDrawerCallbacks {
/**
* Called when an item in the navigation drawer is selected.
*/
void onNavigationDrawerItemSelected(int position);
}
}
MainActivity.java
package com.example.administrator.mosbeau;
import android.app.Activity;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.app.Fragment;
import android.app.FragmentManager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.support.v4.widget.DrawerLayout;
public class MainActivity extends ActionBarActivity
implements NavigationDrawerFragment.NavigationDrawerCallbacks {
/**
* Fragment managing the behaviors, interactions and presentation of the navigation drawer.
*/
private NavigationDrawerFragment mNavigationDrawerFragment;
/**
* Used to store the last screen title. For use in {@link #restoreActionBar()}.
*/
private CharSequence mTitle;
Boolean InternetAvailable = false;
Seocnd detectconnection;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
detectconnection = new Seocnd(this);
InternetAvailable = detectconnection.InternetConnecting();
if (InternetAvailable) {
} else {
NointernetFragment fragment = new NointernetFragment();
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container, fragment)
.commit();
}
mNavigationDrawerFragment = (NavigationDrawerFragment)
getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
mTitle = getTitle();
// Set up the drawer.
mNavigationDrawerFragment.setUp(
R.id.navigation_drawer,
(DrawerLayout) findViewById(R.id.drawer_layout));
}
@Override
public void onNavigationDrawerItemSelected(int position) {
// update the main content by replacing fragments
FragmentManager fragmentManager = getFragmentManager();
// NEW STUFF
if(position == 0){
fragmentManager.beginTransaction()
.replace(R.id.container, HomeFragment.newInstance())
.commit();
}
else if (position == 1){
fragmentManager.beginTransaction()
.replace(R.id.container, CategoryFragment.newInstance())
.commit();
}
else if (position == 2){
fragmentManager.beginTransaction()
.replace(R.id.container, AccountFragment.newInstance())
.commit();
}
else if (position == 3){
fragmentManager.beginTransaction()
.replace(R.id.container, ReferFragment.newInstance())
.commit();
}
else if (position == 4){
fragmentManager.beginTransaction()
.replace(R.id.container, AboutFragment.newInstance())
.commit();
}
else if (position == 5){
fragmentManager.beginTransaction()
.replace(R.id.container, PolicyFragment.newInstance())
.commit();
}
else if (position == 6){
fragmentManager.beginTransaction()
.replace(R.id.container, TermsFragment.newInstance())
.commit();
}
else if (position == 7){
fragmentManager.beginTransaction()
.replace(R.id.container, ContactusFragment.newInstance())
.commit();
}
else if (position == 100){
fragmentManager.beginTransaction()
.replace(R.id.container, NointernetFragment.newInstance())
.commit();
}
}
public void onSectionAttached(int number) {
switch (number) {
case 1:
mTitle = getString(R.string.title_home);
break;
case 2:
mTitle = getString(R.string.title_category);
break;
case 3:
mTitle = getString(R.string.title_login);
break;
case 4:
mTitle = getString(R.string.title_register);
break;
case 5:
mTitle = getString(R.string.title_myaccount);
break;
case 6:
mTitle = getString(R.string.title_referafriend);
break;
case 7:
mTitle = getString(R.string.title_about);
break;
case 8:
mTitle = getString(R.string.title_privacypocity);
break;
case 9:
mTitle = getString(R.string.title_shippingterms);
break;
case 10:
mTitle = getString(R.string.title_contactus);
break;
case 100:
mTitle = getString(R.string.title_nointernet);
break;
}
}
@SuppressWarnings("deprecation")
public void restoreActionBar() {
ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setTitle(mTitle);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
if (!mNavigationDrawerFragment.isDrawerOpen()) {
// Only show items in the action bar relevant to this screen
// if the drawer is not showing. Otherwise, let the drawer
// decide what to show in the action bar.
getMenuInflater().inflate(R.menu.main, menu);
restoreActionBar();
return true;
}
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
((MainActivity) activity).onSectionAttached(
getArguments().getInt(ARG_SECTION_NUMBER));
}
}
}
CategoryFragment.java
package com.example.administrator.mosbeau;
import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
/**
* Created by Administrator on 9/18/2015.
*/
public class CategoryFragment extends Fragment {
public static CategoryFragment newInstance() {
CategoryFragment fragment = new CategoryFragment();
return fragment;
}
public CategoryFragment () {
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View rootView = inflater.inflate(R.layout.categorylayout, container, false);
getActivity().invalidateOptionsMenu();
return rootView;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
((MainActivity) activity).onSectionAttached(2);
}
}
最佳答案
更新您的 selectitem()
和 onNavigationDrawerItemSelected
方法以接受另外两个参数,即 child.id 和 child.name
private void selectItem(int position,String id,String name) {
mCurrentSelectedPosition = position;
if (mDrawerListView != null) {
mDrawerListView.setItemChecked(position, true);
}
if (mDrawerLayout != null) {
mDrawerLayout.closeDrawer(mFragmentContainerView);
}
if (mCallbacks != null) {
mCallbacks.onNavigationDrawerItemSelected(position,id,name);
}
}
在 selectItem()
方法中传递 child.id 和 child.name,以便依次调用 MainActivity
中实现的 onNavigationDrawerItemSelected()
方法.
现在在 MainActivity
中,使用 Bundle
将值传递给 fragment
这里
fragmentManager.beginTransaction()
.replace(R.id.container, CategoryFragment.newInstance(id,name))
.commit();
您还需要更新到CategoryFragment.newInstance(String,String)
以接受参数
将代码更新为“edittext”中的“setText”
在您的“CategoryFragment”“newInstance”方法中,将数据传递到 bundle 中,如下所示
CategoryFragment categoryfragment = new CategoryFragment()
Bundle bundle = new Bundle()
bundle.putStringExtra("id",id)
bundle.putStringExtra("name",name)
categoryfragment.setArguements(bundle)
return categoryfragment
现在在 Categoryfragment 的 onCreateView 中获取如下数据
if(getArguments().getExtras != null) {
String catid = getArguments.getStringExtra("id");
String catname = getArguments.getStringExtra("name");
yourEditText.setText(catname);
}
希望你明白我的意思
关于java - 如何将值从 NavigationDrawerFragment.java 传递到 MainActivity.java 然后传递到 AnotherFragment 页面,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32776710/
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