如何将选定的微调器 id 传递给片段
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【中文标题】如何将选定的微调器 id 传递给片段【英文标题】：How to pass selected spinner id to fragment 【发布时间】：2018-07-19 21:11:13 【问题描述】：您好，我是新手，正在开发 android 应用程序。原谅我的英语。
在我的应用程序中，我有 MainActivity.java 文件，我在其中使用 json 解析来解析 Languagelist 数组。我将它发送到下一个活动，即抽屉活动。 Drawer Activity 包含带有 TabLayout 的片段。在这个 DrawerActivity 中，我有工具栏，我在其中打开微调器并设置我从以前 (MainActivity.java) 获得的数组列表。到这里一切正常，但我想要的是当用户从工具栏微调器中选择或更改语言时，第一个选项卡片段的列表应该被刷新。但它不起作用任何人都可以帮助我解决这个问题。
DrawerActivity.java
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
Bundle bundle=new Bundle();
bundle.putString("frommusic", CAT_ID);
bundle.putString("action", DRAWER_ACTION_LATEST);
bundle.putString("sel_lang", SELECTED_LANGUAGE);
fragmentManager = getSupportFragmentManager();
final FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragment = new LibraryFragment();
fragment.setArguments(bundle);
fragmentTransaction.replace(R.id.main_container_wrapper, fragment);
fragmentTransaction.commit();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
View header = navigationView.inflateHeaderView(R.layout.nav_header_music);
TextView profileName = (TextView) header.findViewById(R.id.profile_name);
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener()
@Override
public boolean onNavigationItemSelected(MenuItem item)
int id = item.getItemId();
if (id == R.id.nav_library)
Bundle bundle=new Bundle();
bundle.putString("frommusic", CAT_ID);
bundle.putString("action", DRAWER_ACTION_LATEST);
bundle.putString("sel_lang", SELECTED_LANGUAGE);
fragmentManager = getSupportFragmentManager();
final FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragment = new LibraryFragment();
fragment.setArguments(bundle);
fragmentTransaction.replace(R.id.main_container_wrapper, fragment);
fragmentTransaction.commit();
else if (id == R.id.nav_song)
Bundle bundle=new Bundle();
bundle.putString("frommusic", CAT_ID);
bundle.putString("action", DRAWER_ACTION_POPULAR);
bundle.putString("sel_lang", SELECTED_LANGUAGE);
fragmentManager = getSupportFragmentManager();
final FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragment = new LibraryFragment();
fragment.setArguments(bundle);
fragmentTransaction.replace(R.id.main_container_wrapper, fragment);
fragmentTransaction.commit();
/*else if (id == R.id.nav_playlist)
else if (id == R.id.nav_sound_cound)
else if (id == R.id.nav_raw_folder)
*/
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.main_container_wrapper, fragment);
transaction.commit();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
assert drawer != null;
drawer.closeDrawer(GravityCompat.START);
return true;
);
@Override
public boolean onCreateOptionsMenu(Menu menu)
getMenuInflater().inflate(R.menu.music, menu);
MenuItem item = menu.findItem(R.id.action_settings);
spinner = (Spinner) MenuItemCompat.getActionView(item);
rcAdapter = new CustomBaseAdapter(MusicActivity.this, langList);
spinner.setAdapter(rcAdapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
LanguageModel ln=new LanguageModel();
ln=langList.get(position);
SELECTED_LANGUAGE=ln.getLangid();
System.out.println("IF SELECT LA"+SELECTED_LANGUAGE);
/*if(SELECTED_LANGUAGE.equals("1"))
SELECTED_LANGUAGE=ln.getLangid();
System.out.println("IF SELECT LA"+SELECTED_LANGUAGE);
Bundle bundle=new Bundle();
bundle.putString("frommusic", CAT_ID);
bundle.putString("action", DRAWER_ACTION_LATEST);
bundle.putString("sel_lang", SELECTED_LANGUAGE);
fragmentManager = getSupportFragmentManager();
final FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragment = new LibraryFragment();
fragment.setArguments(bundle);
fragmentTransaction.replace(R.id.main_container_wrapper, fragment);
fragmentTransaction.commit();
else
SELECTED_LANGUAGE=ln.getLangid();
System.out.println("ELSE SELECT LA"+SELECTED_LANGUAGE);
Bundle bundle=new Bundle();
bundle.putString("frommusic", CAT_ID);
bundle.putString("action", DRAWER_ACTION_LATEST);
bundle.putString("sel_lang", SELECTED_LANGUAGE);
fragmentManager = getSupportFragmentManager();
final FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragment = new LibraryFragment();
fragment.setArguments(bundle);
fragmentTransaction.replace(R.id.main_container_wrapper, fragment);
fragmentTransaction.commit();
*/
@Override
public void onNothingSelected(AdapterView<?> parent)
);
/*ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.spinner_list_item_array, android.R.layout.simple_spinner_item);*/
//adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
return true;
LibraryFragment.java
catid=getArguments().getString("frommusic");
SELECTED_ACTION=getArguments().getString("action");
SELECTED_LANGUAGE=getArguments().getString("sel_lang");
System.out.println("in library"+SELECTED_LANGUAGE);
tabLayout = (TabLayout)view.findViewById(R.id.tabs);
viewPager = (ViewPager)view.findViewById(R.id.view_pager);
viewPager.setAdapter(new CustomFragmentPageAdapter(getChildFragmentManager()));
tabLayout.setupWithViewPager(viewPager);
return view;
public class CustomFragmentPageAdapter extends FragmentPagerAdapter
private final String TAG = CustomFragmentPageAdapter.class.getSimpleName();
private static final int FRAGMENT_COUNT = 3;
public CustomFragmentPageAdapter(FragmentManager fm)
super(fm);
@Override
public Fragment getItem(int position)
switch (position)
case 0:
Fragment f1 = new SongFragment();
Bundle args1 = new Bundle();
args1.putString("fromlibfrag", catid);
args1.putString("action", SELECTED_ACTION);
args1.putString("sel_lang", SELECTED_LANGUAGE);
f1.setArguments(args1);
return f1;
case 1:
Fragment f2 = new PhotoFragment();
Bundle args2 = new Bundle();
args2.putString("fromlibfrag", catid);
args2.putString("action", SELECTED_ACTION);
f2.setArguments(args2);
return f2;
case 2:
Fragment f3 = new SmsFragment();
Bundle args3 = new Bundle();
args3.putString("fromlibfrag", catid);
args3.putString("action", SELECTED_ACTION);
f3.setArguments(args3);
return f3;
return null;
@Override
public int getCount()
return FRAGMENT_COUNT;
@Override
public CharSequence getPageTitle(int position)
switch (position)
case 0:
return "Videos";
case 1:
return "Photos";
case 2:
return "SMS";
return null;
SongFragment.java
getActivity().setTitle("Your Status");
catid=getArguments().getString("fromlibfrag");
SELECTED_ACTION=getArguments().getString("action");
SELECTED_LANGUAGE=getArguments().getString("sel_lang");
System.out.println("in songfragment"+SELECTED_LANGUAGE);
vidRecyclerView = (RecyclerView)view.findViewById(R.id.song_list);
linearLayoutManager = new LinearLayoutManager(getActivity());
vidRecyclerView.setLayoutManager(linearLayoutManager);
vidRecyclerView.setHasFixedSize(true);
VIDEO_LIST_URL= WebUrls.WEB_URL+"GetVideos&language_id="+SELECTED_LANGUAGE+"&action="+SELECTED_ACTION+"&category_id="+catid;
System.out.println("FINAL URL"+VIDEO_LIST_URL);
pDialog = new ProgressDialog(getActivity());
// Showing progress dialog before making http request
pDialog.setMessage("Loading...");
pDialog.show();
makeJsonArrayRequestvideos();
【问题讨论】：
【参考方案1】：在LibraryFragment.java中创建一个公共方法
将其命名为 updateData() // 传递您要使用的参数。
现在
DrawerActivity.java 使
LibraryFragment 实例公开
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener()
@Override
public boolean onNavigationItemSelected(MenuItem item)
int id = item.getItemId();
if (id == R.id.nav_library)
Bundle bundle=new Bundle();
bundle.putString("frommusic", CAT_ID);
bundle.putString("action", DRAWER_ACTION_LATEST);
bundle.putString("sel_lang", SELECTED_LANGUAGE);
fragmentManager = getSupportFragmentManager();
final FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
mLibraryFragment= new LibraryFragment();
fragment.setArguments(bundle);
fragmentTransaction.replace(R.id.main_container_wrapper, fragment);
fragmentTransaction.commit();
else if (id == R.id.nav_song)
Bundle bundle=new Bundle();
bundle.putString("frommusic", CAT_ID);
bundle.putString("action", DRAWER_ACTION_POPULAR);
bundle.putString("sel_lang", SELECTED_LANGUAGE);
fragmentManager = getSupportFragmentManager();
final FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragment = new LibraryFragment();
fragment.setArguments(bundle);
fragmentTransaction.replace(R.id.main_container_wrapper, fragment);
fragmentTransaction.commit();
/*else if (id == R.id.nav_playlist)
else if (id == R.id.nav_sound_cound)
else if (id == R.id.nav_raw_folder)
*/
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.main_container_wrapper, fragment);
transaction.commit();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
assert drawer != null;
drawer.closeDrawer(GravityCompat.START);
return true;
);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
LanguageModel ln=new LanguageModel();
ln=langList.get(position);
SELECTED_LANGUAGE=ln.getLangid();
System.out.println("IF SELECT LA"+SELECTED_LANGUAGE);
if(mLibraryFragment!=null)
mLibraryFragment.updateData()//pass the param
you want upate in library fragment.
【讨论】：
能否详细说明一下 你没有得到什么？ 在哪里创建方法？以及在微调监听器中写什么？以上是关于如何将选定的微调器 id 传递给片段的主要内容，如果未能解决你的问题，请参考以下文章