首先我要说的是，我的搜索功能完全正常，并且在从我的主Activity调用时非常有效。
但是我正在开发一个应用程序，我想在选择搜索图标时打开不同的活动然后应该有两个选项卡＆＃34; Quotes＆＃34;或＆＃34;作者＆＃34;。
选择其中任何一个都应该引用我创建的两个片段，这样我就可以搜索特定的引用或者作者。
我正在操纵我在gitHub上找到的特定sample。问题是每当我在主活动中选择搜索图标时，我引用了我创建的搜索活动，但是SearchView或设置菜单不可见，而且应该可见的片段选项卡也不存在，并且来自我的工具栏我无法返回主要活动，其中我刚刚提到的所有这些都出现在工具栏中。This is how it actually looks。
我精确地遵循了示例项目，所以我真的很好奇我能错过什么，或者可能是工具栏中没有任何可见的可能原因，即使所有菜单项都已经膨胀并实施喜欢主要的活动吗？
这是从主要活动中选择动作搜索时引用的搜索活动
public class SearchActivity extends AppCompatActivity {
private DrawerLayout mDrawerLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ActionBar ab = getSupportActionBar();
ab.setHomeAsUpIndicator(R.drawable.ic_menu);
ab.setDisplayHomeAsUpEnabled(true);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
if (navigationView != null) {
setupDrawerContent(navigationView);
}
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
if (viewPager != null) {
setupViewPager(viewPager);
}
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
mDrawerLayout.openDrawer(GravityCompat.START);
return true;
}
return super.onOptionsItemSelected(item);
}
private void setupViewPager(ViewPager viewPager) {
Adapter adapter = new Adapter(getSupportFragmentManager());
adapter.addFragment(new AuthorSearchFragment(), "Quotes");
adapter.addFragment(new QuoteSearchFragment(), "Authors");
viewPager.setAdapter(adapter);
}
private void setupDrawerContent(NavigationView navigationView) {
navigationView.setNavigationItemSelectedListener(
new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
menuItem.setChecked(true);
mDrawerLayout.closeDrawers();
return true;
}
});
}
static class Adapter extends FragmentPagerAdapter {
private final List<Fragment> mFragments = new ArrayList<>();
private final List<String> mFragmentTitles = new ArrayList<>();
public Adapter(FragmentManager fm) {
super(fm);
}
public void addFragment(Fragment fragment, String title) {
mFragments.add(fragment);
mFragmentTitles.add(title);
}
@Override
public Fragment getItem(int position) {
return mFragments.get(position);
}
@Override
public int getCount() {
return mFragments.size();
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitles.get(position);
}
}
}
这是我的主要活动，其中所有菜单和searchView在工具栏中都可见
public class MainActivity extends AppCompatActivity implements FragmentDrawer.FragmentDrawerListener {
@Bind(R.id.toolbar)
Toolbar mToolbar;
private FragmentDrawer drawerFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
setSupportActionBar(mToolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true);
drawerFragment = (FragmentDrawer)
getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout), mToolbar);
drawerFragment.setDrawerListener(this);
// display the first navigation drawer view on app launch
displayView(0);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
if(id == R.id.action_search){
//Toast.makeText(getApplicationContext(), "Search action is selected!", Toast.LENGTH_SHORT).show();
setContentView(R.layout.activity_search);
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onDrawerItemSelected(View view, int position) {
displayView(position);
}
private void displayView(int position) {
Fragment fragment = null;
String title = getString(R.string.app_name);
switch (position) {
case 0:
fragment = new HomeFragment();
title = getString(R.string.title_home);
break;
case 1:
fragment = new FavoriteFragment();
title = getString(R.string.nav_item_favorite_quote);
break;
case 2:
fragment = new AddQuoteFragment();
title = getString(R.string.nav_item_add_quote);
break;
case 3:
fragment = new CategoryFragment();
title = getString(R.string.nav_item_category);
break;
case 4:
fragment = new PhotoEditorFragment();
title = getString(R.string.nav_item_photo_editor);
break;
case 5:
fragment = new AllAuthorsFragment();
title = getString(R.string.nav_item_author);
break;
case 6:
fragment = new QuoteAlarmFragment();
title = getString(R.string.nav_item_quote_alarm);
break;
case 7:
fragment = new MyQuotesFragment();
title = getString(R.string.nav_item_my_quotes);
break;
case 8:
fragment = new QuotesFragment();
title = getString(R.string.nav_item_quotes);
break;
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.container_body, fragment);
fragmentTransaction.commit();
// set the toolbar title
getSupportActionBar().setTitle(title);
}
}
}
这是应按Tab键搜索特定条件的片段之一
public class AuthorSearchFragment extends Fragment implements SearchView.OnQueryTextListener{
AuthorViewAdapter authorViewAdapter;
List<AuthorAdapterModel> filteredAuthors;
List<AuthorAdapterModel> beforeFilter;
DrawableHelpers drawableHelpers = new DrawableHelpers();
List<Author> authorList;
@Bind(R.id.recyclerView)
RecyclerView recyclerView;
private DbSeeder dbSeeder;
public AuthorSearchFragment() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.onCreate(savedInstanceState);
dbSeeder = new DbSeeder(getActivity());
dbSeeder.checkDatabase();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_author_search, container, false);
ButterKnife.bind(this, rootView);
return rootView;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
setHasOptionsMenu(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
initializeData();
initializeAdapter();
}
@Override
public void onCreateOptionsMenu (Menu menu, MenuInflater inflater){
inflater.inflate(R.menu.menu_main, menu);
final MenuItem item = menu.findItem(R.id.action_search);
final SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(this);
}
@Override
public boolean onQueryTextSubmit(String query) {
final List<AuthorAdapterModel> filteredAuthors = filterAuthor(beforeFilter, query);
for (Author x : authorList) {
beforeFilter.add(new AuthorAdapterModel(
drawableHelpers.getDrawableBasedOnName(x.getAuthorName(), "_author", "drawable", getActivity())
, x.getMyQuotes().size(), x.getAuthorName()));
}
authorViewAdapter = new AuthorViewAdapter(filteredAuthors, getActivity());
recyclerView.setAdapter(authorViewAdapter);
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
return false;
}
public void initializeData(){
authorList = new ArrayList<>();
beforeFilter = new ArrayList<>();
authorList = dbSeeder.GetAllAuthors();
for (Author x : authorList) {
beforeFilter.add(new AuthorAdapterModel(
drawableHelpers.getDrawableBasedOnName(x.getAuthorName(), "_author", "drawable", getActivity())
, x.getMyQuotes().size(), x.getAuthorName()));
}
}
public void initializeAdapter(){
authorViewAdapter = new AuthorViewAdapter(beforeFilter,getActivity());
recyclerView.setAdapter(authorViewAdapter);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
@Override
public void onDetach() {
super.onDetach();
}
private List<AuthorAdapterModel> filterAuthor(List<AuthorAdapterModel> authors, String query){
query = query.toLowerCase();
boolean found = false;
final List<AuthorAdapterModel> filteredAuthors = new ArrayList<>();
for (AuthorAdapterModel author : authors) {
final String text = author.getAuthor().toLowerCase();
if (text.contains(query)) {
filteredAuthors.add(author);
found = true;
}
}
if (found == false) {
Toast.makeText(getContext(), "This Author was not Found!", Toast.LENGTH_SHORT).show();
}
return filteredAuthors;
}
答案 0 :(得分：0)
我解决了我之前遇到的问题。我在主要活动类中使用“setContentView”的“onOptionsItemSelected”函数中错误地调用了SearchActivity。
if(id == R.id.action_search){
//Toast.makeText(getApplicationContext(), "Search action is selected!", Toast.LENGTH_SHORT).show();
setContentView(R.layout.activity_search);
return true;
}
我应该做的是创建一个引用和启动SearchActivity的意图。它现在完全按照我最初的预期运作。
if(id == R.id.action_search){
Intent intent = new Intent(MainActivity.this , SearchActivity.class);
startActivity(intent);
return true;
}