问题
in my NavigationDrawerFragment.java
i have this code
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;
}
});
after i click the child, i set selectItem to 1
the selectItem(1) will go to 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();
}
}
my question is how to pass the child.name and child.id from NavigationDrawerFragment.java to MainActivity.java then pass to CategoryFragment?
or any other solution to pass the child.name and child.id to CategoryFragment.
COMPLETE CODE
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);
}
}
回答1:
update your selectitem() and onNavigationDrawerItemSelected methods to accept two more arguments i.e child.id and 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);
}
}
pass child.id and child.name in selectItem() method so which in turn will call onNavigationDrawerItemSelected() method implemented in MainActivity.
Now in MainActivity, pass the values to the fragment using Bundle
here
fragmentManager.beginTransaction()
.replace(R.id.container, CategoryFragment.newInstance(id,name))
.commit();
you will also need to update to CategoryFragment.newInstance(String,String) to accept the arguments
Updating code to 'setText' in 'edittext'
In your 'CategoryFragment' 'newInstance' method pass data in bundle like below
CategoryFragment categoryfragment = new CategoryFragment()
Bundle bundle = new Bundle()
bundle.putStringExtra("id",id)
bundle.putStringExtra("name",name)
categoryfragment.setArguements(bundle)
return categoryfragment
Now in onCreateView of Categoryfragment get this data like below
if(getArguments().getExtras != null) {
String catid = getArguments.getStringExtra("id");
String catname = getArguments.getStringExtra("name");
yourEditText.setText(catname);
}
Hope you got my point
来源：https://stackoverflow.com/questions/32776710/how-to-pass-value-from-navigationdrawerfragment-java-to-mainactivity-java-then-p