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我已經創建了一個帶有RecyclerView的導航抽屜。我從YouTube瞭解到這一點。不過，我無法爲它實現「onNavigationDrawerItemSelected」方法。我想要做的是爲用戶能夠點擊列表中的項目，它將導航到一個活動，而不是一個片段。導航抽屜RecyclerView Items點擊活動
我是新來的android編程，因此我不理解代碼。我在網上找遍了各種教程，比如下面的鏈接，但它不起作用。我花了很多時間試圖弄清楚這一點，我得到的只是應用程序崩潰，不得不重新開始整個事情。這將意味着很多給我，如果有人能幫助我在此
How to navigate to different activities through the navigation drawer
OnItemClickListener Navigation Drawer
http://blog.evizija.si/android-layout/
下面是我爲我的MainActivity，NavigationDrawer和NavigationDrawerAdapter作出的代碼。
NavigationDrawerFragment：
public class NavigationDrawerFragment extends Fragment {
private RecyclerView recyclerView;
public static final String PREF_FILE_NAME = "testpref";
public static final String KEY_USER_LEARNED_DRAWER = "user_learned_drawer";
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private NavigationDrawerAdapter adapter;
/*This is to tell the User that there is a navigation drawer*/
private boolean mUserLearnedDrawer;
private boolean mFromSavedInstanceState;
private View containerView;
public NavigationDrawerFragment() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mUserLearnedDrawer = Boolean.valueOf(readFromPreferences(getActivity(), KEY_USER_LEARNED_DRAWER, "false"));
if (savedInstanceState != null) {
mFromSavedInstanceState = true;
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View layout = inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
recyclerView = (RecyclerView) layout.findViewById(R.id.navigation_drawer_list);
adapter = new NavigationDrawerAdapter(getActivity(), getData());
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
return layout;
}
//Change the Drawables and Text Here for the NavigationDrawer List Items
public static List<NavigationDrawerItems> getData() {
List<NavigationDrawerItems> data = new ArrayList<>();
int[] icons = {R.drawable.ic_account_circle_black_36dp, R.drawable.ic_home_black_36dp, R.drawable.ic_language_black_36dp, R.drawable.ic_redeem_black_36dp, R.drawable.ic_settings_black_36dp};
String[] titles = {"Restaurants", "Categories", "Planner", "About Us", "Settings"};
for (int i = 0; i < titles.length && i < icons.length; i++) {
NavigationDrawerItems current = new NavigationDrawerItems();
current.iconId = icons[i];
current.title = titles[i];
data.add(current);
}
return data;
}
public void setUp(int fragmentId, DrawerLayout drawerLayout, Toolbar toolbar) {
containerView = getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
mDrawerToggle = new ActionBarDrawerToggle(getActivity(), drawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close) {
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (!mUserLearnedDrawer) {
mUserLearnedDrawer = true;
saveToPreferences(getActivity(), KEY_USER_LEARNED_DRAWER, mUserLearnedDrawer + "");
}
getActivity().invalidateOptionsMenu();
}
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
getActivity().invalidateOptionsMenu();
}
};
if (!mUserLearnedDrawer && !mFromSavedInstanceState) {
mDrawerLayout.openDrawer(containerView);
}
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mDrawerToggle.syncState();
}
});
}
public static void saveToPreferences(Context context, String preferenceName, String preferenceValue) {
SharedPreferences sharedPreferences = context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(preferenceName, preferenceValue);
editor.apply();
}
public static String readFromPreferences(Context context, String preferenceName, String defaultValue) {
SharedPreferences sharedPreferences = context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
return sharedPreferences.getString(preferenceName, defaultValue);
}
}
MainActivity：
public class MainActivity extends ActionBarActivity {
private Toolbar toolbar;
private NavigationDrawerFragment drawerFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_appbar);
/*======= This three statement below is to add the customized ToolBar including the "private" statement above and the navigation drawer =======*/
toolbar = (Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
drawerFragment = (NavigationDrawerFragment)
getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout), toolbar);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@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();
/*======= The term "navigate" is taken from the menu_main.xml file. Rename them when necessary =======*/
/*======= The startActivity statement enables the icon to be clicked and brings to another activity =======*/
if (id == R.id.navigate) {
startActivity(new Intent(this, SubActivity.class));
}
return super.onOptionsItemSelected(item);
}
}
NavigationDrawerAdapter：
public class NavigationDrawerAdapter extends RecyclerView.Adapter<NavigationDrawerAdapter.MyViewHolder> {
private LayoutInflater inflater;
List<NavigationDrawerItems> data = Collections.emptyList();
public NavigationDrawerAdapter(Context context, List<NavigationDrawerItems> data) {
inflater = LayoutInflater.from(context);
this.data = data;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.fragment_navigation_drawer_row, parent, false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
NavigationDrawerItems current = data.get(position);
holder.title.setText(current.title);
holder.icon.setImageResource(current.iconId);
}
@Override
public int getItemCount() {
return data.size();
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView title;
ImageView icon;
public MyViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.navigation_drawer_list_text);
icon = (ImageView) itemView.findViewById(R.id.navigation_drawer_list_icon);
}
}
}
嘗試設置適配器內的onclick ... –
您應該使用基本活動概念 –