Develop Reference

DrawerLayout CoordinatorLayout AppBarLayout Fragment are not doing show and hide on Scroll

I want to do something described in this post, but I couldn't get the hide and show on scroll to work. Everything is showing, the drawer menu, the header view and the listview, but when I scroll the listview up and down, the header view stays there, doesn't hide and show as the list view is being scrolled. I've looked up few other posts such as these for a solution, but none of them helped.
Android design library CoordinatorLayout, AppBarLayout and DrawerLayout
DrawerLayout + CollapsingToolbar + Fragments; Toolbar won't collapse or show image
I have an Activity which contains a drawer menu and a fragment. In the Fragment, there is the CoordinatorLayout and AppBarLayout that I want to do show and hide the header view on list view scrolling.
The Activity layout with the DrawerLayout as the root view containing a FrameLayout for the main content and the RelativeLayout for the drawer menu content.
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:fitsSystemWindows="true">
<FrameLayout
android:id="#+id/content_frame"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:clickable="true"/>
<RelativeLayout
android:id="#+id/left_drawer"
android:layout_height="match_parent"
android:layout_width="280dp"
android:layout_gravity="start"
android:background="#eee">
<RelativeLayout
android:id="#+id/sliding_menu_logo_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#eee">
<ImageView
android:id="#+id/sliding_menu_logo"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_margin="20dp"
android:layout_centerInParent="true"
android:scaleType="centerInside"
android:src="#drawable/ic_launcher" />
</RelativeLayout>
<ListView
android:id="#+id/list"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_alignParentBottom="true"
android:layout_below="#id/sliding_menu_logo_container"
android:clipToPadding="true"
android:divider="#null"
android:dividerHeight="0dp"
android:drawSelectorOnTop="false"
android:fastScrollEnabled="false"
android:scrollbarStyle="outsideOverlay" />
</RelativeLayout>
</android.support.v4.widget.DrawerLayout>
The Fragment layout where I want to hide the header view when list view is scrolling up and show the header view when the list view is scrolling down.
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/my_appbar_container"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="#eee"
app:layout_scrollFlags="scroll|enterAlways|exitUntilCollapsed">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="5"
android:text="First Name"/>
<EditText
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="5"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="5"
android:text="Last Name"/>
<EditText
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="5"/>
</LinearLayout>
</LinearLayout>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<ListView
android:id="#+id/rv_numbers"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</FrameLayout>
</android.support.design.widget.CoordinatorLayout>
The app theme is
Theme.AppCompat.Light.DarkActionBar
The Activity class
public class ScrollingActivity4 extends AppCompatActivity {
protected DrawerLayout drawerLayout;
RelativeLayout leftDrawerView;
protected ActionBarDrawerToggle drawerToggle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scrolling4);
ScrollingActivity4Fragment scrollingActivity4Fragment = new ScrollingActivity4Fragment();
getFragmentManager()
.beginTransaction()
.replace(R.id.content_frame, scrollingActivity4Fragment, "tag_scrollingActivity4Fragment")
.addToBackStack(null)
.commit();
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setDisplayUseLogoEnabled(true);
actionBar.setHomeAsUpIndicator(R.drawable.ic_launcher);
if (drawerToggle == null) {
drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, R.drawable.ic_launcher, R.string.drawer_open, R.string.drawer_close) {
public void onDrawerClosed(View view) {
}
public void onDrawerOpened(View drawerView) {
}
public void onDrawerSlide (View drawerView, float slideOffset) {
}
public void onDrawerStateChanged(int newState) {
}
};
drawerLayout.setDrawerListener(drawerToggle);
}
drawerToggle.syncState();
leftDrawerView = (RelativeLayout) findViewById(R.id.left_drawer);
ListView rvNumbers = (ListView) findViewById(R.id.list);
String [] numbers = {"One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine"};
ItemArrayAdapter itemArrayAdapter = new ItemArrayAdapter(this, R.layout.list_item, numbers);
rvNumbers.setAdapter(itemArrayAdapter);
}
#Override
public boolean onOptionsItemSelected (MenuItem item) {
// The action bar home/up action should open or close the drawer.
// ActionBarDrawerToggle will take care of this.
if (drawerToggle.onOptionsItemSelected(item)) {
return true;
}
// Handle action buttons
switch (item.getItemId()) {
default:
return super.onOptionsItemSelected(item);
}
}
public class ItemArrayAdapter extends ArrayAdapter<String> {
String[] itemList;
private int listItemLayout;
public ItemArrayAdapter(Context context, int layoutId, String[] itemList) {
super(context, layoutId, itemList);
listItemLayout = layoutId;
this.itemList = itemList;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
int pos = position;
String item = getItem(pos);
ViewHolder viewHolder;
if (convertView == null) {
viewHolder = new ViewHolder();
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(listItemLayout, parent, false);
viewHolder.item = (TextView) convertView.findViewById(R.id.tv_number);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.item.setText(item);
return convertView;
}
class ViewHolder {
TextView item;
}
}
}
The Fragment Class
public class ScrollingActivity4Fragment extends Fragment {
LinearLayout llHeader;
ListView rvNumbers;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_scrolling4_fragment, container, false);
llHeader = (LinearLayout) view.findViewById(R.id.ll_header);
rvNumbers = (ListView) view.findViewById(R.id.rv_numbers);
String [] numbers = {"One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine"};
ItemArrayAdapter itemArrayAdapter = new ItemArrayAdapter(getActivity(), R.layout.list_item, numbers);
rvNumbers.setAdapter(itemArrayAdapter);
return view;
}
public class ItemArrayAdapter extends ArrayAdapter<String> {
String[] itemList;
private int listItemLayout;
public ItemArrayAdapter(Context context, int layoutId, String[] itemList) {
super(context, layoutId, itemList);
listItemLayout = layoutId;
this.itemList = itemList;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
int pos = position;
String item = getItem(pos);
ViewHolder viewHolder;
if (convertView == null) {
viewHolder = new ViewHolder();
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(listItemLayout, parent, false);
viewHolder.item = (TextView) convertView.findViewById(R.id.tv_number);
convertView.setTag(viewHolder); // view lookup cache stored in tag
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.item.setText(item);
return convertView;
}
class ViewHolder {
TextView item;
}
}
}

According to this post: ScrollingViewBehavior for ListView, CoordinatorLayout works only with RecyclerView and NestedScrollView, so I suggest you to change the ListView to RecyclerView

Navigation Drawer animation is lagging while closing

I going to implement navigation drawer for one of my project. I am able to implement the same. However there is some lag in navigation drawer. Please Suggest.here is the image
Below is my code
Home_activity.xml
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#drawable/image_login">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<RelativeLayout
android:id="#+id/searchBox"
android:layout_width="match_parent"
android:layout_height="45dp"
android:layout_below="#+id/toolbar"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="10dp"
android:background="#ffffff">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:text="Search a Property"
android:textColor="#b8bcc0"
android:textSize="14sp" />
<ImageView
android:id="#+id/imageView"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:src="#drawable/icon_search" />
</RelativeLayout>
<RelativeLayout
android:id="#+id/box"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/searchBox"
android:gravity="center">
<ImageView
android:id="#+id/buyRentImage"
android:layout_width="110dp"
android:layout_height="110dp"
android:layout_marginBottom="2dp"
android:layout_marginRight="1dp"
android:src="#drawable/image_buy_rent" />
<ImageView
android:id="#+id/applyLoanImage"
android:layout_width="110dp"
android:layout_height="110dp"
android:layout_marginRight="3dp"
android:layout_toRightOf="#+id/buyRentImage"
android:src="#drawable/image_apply_for_loan" />
<ImageView
android:id="#+id/newProjectImage"
android:layout_width="110dp"
android:layout_height="110dp"
android:layout_marginRight="1dp"
android:layout_below="#+id/buyRentImage"
android:src="#drawable/image_new_projects" />
<ImageView
android:id="#+id/postPropertyImage"
android:layout_width="110dp"
android:layout_height="110dp"
android:layout_marginRight="3dp"
android:layout_below="#+id/buyRentImage"
android:layout_toRightOf="#+id/newProjectImage"
android:src="#drawable/image_post_my_property" />
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="70dp">
<RelativeLayout
android:id="#+id/homeiconImage"
android:layout_width="55dp"
android:layout_height="55dp"
android:layout_marginLeft="20dp"
android:layout_centerVertical="true"
android:background="#drawable/circle_blue"
android:gravity="center">
<ImageView
android:layout_width="30dp"
android:layout_height="30dp"
android:src="#drawable/icon_verified_property" />
</RelativeLayout>
<TextView
android:id="#+id/totalProperty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="25dp"
android:layout_marginTop="10dp"
android:layout_toRightOf="#id/homeiconImage"
android:text="300+"
android:textColor="#008dd5"
android:textSize="20sp"
android:textStyle="bold" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/totalProperty"
android:layout_marginLeft="25dp"
android:layout_toRightOf="#id/homeiconImage"
android:text="VARIFIED PROPERTIES"
android:textColor="#3d3e40"
android:textSize="16sp" />
<ImageView
android:layout_width="35dp"
android:layout_height="35dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="4dp"
android:src="#drawable/icon_next" />
</RelativeLayout>
<View
android:layout_width="match_parent"
android:layout_height="5dp"
android:layout_alignParentBottom="true"
android:background="#008dd5" />
</LinearLayout>
<fragment
android:id="#+id/fragment_navigation_drawer"
android:name="com.androidmobile.thanehomes.thanehomes.activities.home.NavigationFragment"
android:layout_width="#dimen/nav_drawer_width"
android:layout_height="match_parent"
android:layout_gravity="start"
tools:layout="#layout/fragment_navigation" />
Home.java
public class Home extends AppCompatActivity implements NavigationFragment.FragmentDrawerListener {
Toolbar toolbar;
RelativeLayout box, searchBox;
ImageView buyRentImg, applyLoanImg, newProjectImg, postProjectImg;
TextView buyRentTxt, postPropertyTxt;
Menu myMenu;
int settleCount;
private NavigationFragment drawerFragment;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
settleCount = 1;
toolbar = (Toolbar) findViewById(R.id.toolbar);
searchBox = (RelativeLayout) findViewById(R.id.searchBox);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle(" Thanehomes");
getSupportActionBar().setIcon(R.drawable.ic_logo);
box = (RelativeLayout) findViewById(R.id.box);
box.setRotation(45.0f);
searchBox.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent searchIntent = new Intent(Home.this, SearchProperty.class);
startActivity(searchIntent);
}
});
drawerFragment = (NavigationFragment)
getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawerLayout), toolbar);
drawerFragment.setDrawerListener(this);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
myMenu = menu;
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.home_menu, menu);
MenuItem item = myMenu.findItem(R.id.notification);
MenuItemCompat.setActionView(item, R.layout.update_count);
View count = myMenu.findItem(R.id.notification).getActionView();
TextView t = (TextView) count.findViewById(R.id.count);
if (settleCount < 1) {
t.setVisibility(View.GONE);
} else {
t.setVisibility(View.VISIBLE);
t.setText("" + settleCount);
}
count.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Toast.makeText(getApplicationContext(), "Click", Toast.LENGTH_SHORT).show();
Intent notificationIntent = new Intent(Home.this, NotificationList.class);
startActivity(notificationIntent);
}
});
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
default:
return super.onOptionsItemSelected(item);
}
}
#Override
public void onDrawerItemSelected(View view, int position) {
Toast.makeText(getApplicationContext(), position + "", Toast.LENGTH_SHORT).show();
}
}
NavigationFragment.java
public class NavigationFragment extends Fragment {
private static String TAG = NavigationFragment.class.getSimpleName();
private RecyclerView recyclerView;
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private NavigationDrawerAdapter adapter;
private View containerView;
private static String[] titles = null;
private FragmentDrawerListener drawerListener;
public NavigationFragment() {
}
public void setDrawerListener(FragmentDrawerListener listener) {
this.drawerListener = listener;
}
public static List<NavDrawerItem> getData() {
List<NavDrawerItem> data = new ArrayList<>();
// preparing navigation drawer items
for (int i = 0; i < titles.length; i++) {
NavDrawerItem navItem = new NavDrawerItem();
navItem.setTitle(titles[i]);
data.add(navItem);
}
return data;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// drawer labels
titles = getActivity().getResources().getStringArray(R.array.nav_drawer_labels);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflating view layout
View layout = inflater.inflate(R.layout.fragment_navigation, container, false);
recyclerView = (RecyclerView) layout.findViewById(R.id.drawerList);
adapter = new NavigationDrawerAdapter(getActivity(), getData());
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getActivity(), recyclerView, new ClickListener() {
#Override
public void onClick(View view, int position) {
drawerListener.onDrawerItemSelected(view, position);
mDrawerLayout.closeDrawer(containerView);
}
#Override
public void onLongClick(View view, int position) {
}
}));
return layout;
}
public void setUp(int fragmentId, DrawerLayout drawerLayout, final 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);
getActivity().invalidateOptionsMenu();
}
#Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
getActivity().invalidateOptionsMenu();
}
#Override
public void onDrawerSlide(View drawerView, float slideOffset) {
super.onDrawerSlide(drawerView, slideOffset);
toolbar.setAlpha(1 - slideOffset / 2);
}
};
mDrawerLayout.addDrawerListener(mDrawerToggle);
mDrawerLayout.post(new Runnable() {
#Override
public void run() {
mDrawerToggle.syncState();
}
});
}
public static interface ClickListener {
public void onClick(View view, int position);
public void onLongClick(View view, int position);
}
static class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final ClickListener clickListener) {
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
#Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
#Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null) {
clickListener.onLongClick(child, recyclerView.getChildAdapterPosition(child));
}
}
});
}
#Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
clickListener.onClick(child, rv.getChildPosition(child));
}
return false;
}
#Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
public interface FragmentDrawerListener {
public void onDrawerItemSelected(View view, int position);
}
}

If Navigation drawer is lagging while opening it means you are doing some resource intensive work in your navigation drawer.
If it lags while closing it means the fragment you are showing through navigation drawer is taking longer than navigation close time to draw itself.
Your problem is that you are doing some heavy task in the fragment you are opening through nav drawer.

Not completely sure but I got issues with lag at navigation drawer for some reason when I define support-screens and it is running in screen compatibility mode.
However it seemed to be caused by update of the burger menu icon by the ActionBarDrawerToggle.
May you can check if the problem vanishes when you provide an empty implementaion (supress also super-call) of onDrawerSlide
#Override
public void onDrawerSlide(View drawerView, float slideOffset) {
}
If it looks better you can try to perform that actions in a separate thread (if this UI features are necessary for you at all).

Recycler view not displaying items-Android studio

I am making an app which consists of a navigation drawer and a recycler view inside it. However, the items inside the recycler view are not being displayed. I am not sure what I have been doing wrong. I will provide what I have. If you require anything please ask. Thanks
Adapter
public class Adapter extends RecyclerView.Adapter<Adapter.MyViewHolder> {
private LayoutInflater inflater;
List<Information> data = Collections.emptyList();
public Adapter(Context context, List<Information> data){
inflater=LayoutInflater.from(context);
this.data=data;
}
public MyViewHolder onCreateViewHolder(ViewGroup parent, int i) {
View view = inflater.inflate(R.layout.custom_row, parent, false);
MyViewHolder holder= new MyViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(MyViewHolder viewHolder, int i) {
Information current = data.get(i);
viewHolder.title.setText(current.title);
viewHolder.icon.setImageResource(current.iconId);
}
#Override
public int getItemCount() {
return 0;
}
class MyViewHolder extends RecyclerView.ViewHolder{
TextView title;
ImageView icon;
public MyViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.listText);
icon = (ImageView) itemView.findViewById(R.id.listIcon);
}
}
}
Information
public class Information {
int iconId;
String title;
}
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 boolean mUserLearnedDrawer;
private View containerView;
private Adapter adapter;
private boolean mFromSavedInstanceState;
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.drawerList);
adapter = new Adapter(getActivity(),getData());
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
return layout;
}
public static List<Information> getData(){
List<Information> data = new ArrayList<>();
int[] icons={R.drawable.thechefhat,R.drawable.thegrocerybasket,R.drawable.favouritesstar,R.drawable.supported};
String[] titles = {"Recipes","Ingredients","Favourites","Help"};
for(int i=0;i<titles.length&&i<icons.length;i++){
Information current = new Information();
current.iconId=icons[i];
current.title = titles[i];
data.add(current);
}
return data;
}
public void setUp(int fragmentID, DrawerLayout drawerLayout, final 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();
}
#Override
public void onDrawerSlide(View drawerView, float slideOffset) {
super.onDrawerSlide(drawerView, slideOffset);
if(slideOffset<0.6)
toolbar.setAlpha(1-slideOffset);
}
};
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);
}
}
Main Activity
public class MainActivity extends AppCompatActivity {
Toolbar toolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar)findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true);
NavigationDrawerFragment 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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
custom_row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<ImageView
android:padding="8dp"
android:id="#+id/listIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:src="#drawable/supported"
/>
<TextView
android:id="#+id/listText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Dummy Text"
android:padding="8dp"
android:layout_gravity="center_vertical" />
</LinearLayout>
fragment_navigation_drawer.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/lightPrimaryColor"
tools:context="com.example.ivan.tutorialapp.NavigationDrawerFragment">
<LinearLayout
android:id="#+id/containerDrawerImage"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:layout_width="280dp"
android:layout_height="140dp"
android:layout_marginBottom="16dp"
android:src="#drawable/banner" />
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/drawerList"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v7.widget.RecyclerView>
</RelativeLayout>
custom_row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<ImageView
android:padding="8dp"
android:id="#+id/listIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:src="#drawable/supported"
/>
<TextView
android:id="#+id/listText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Dummy Text"
android:padding="8dp"
android:layout_gravity="center_vertical" />
</LinearLayout>
activity_main.xml
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/drawer_Layout"
android:layout_width="match_parent"
android:fitsSystemWindows="true"
android:layout_height="match_parent">
<RelativeLayout
android:fitsSystemWindows="true"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.ivan.tutorialapp.MainActivity">
<include
android:id="#+id/app_bar"
layout="#layout/app_bar">
</include>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/app_bar"
android:text="#string/hello_world"
/>
</RelativeLayout>
<fragment
android:id="#+id/fragment_navigation_drawer"
android:name="com.example.ivan.tutorialapp.NavigationDrawerFragment"
android:layout_width="280dp"
android:layout_height="match_parent"
android:layout_gravity="start"
app:layout="#layout/fragment_navigation_drawer"
tools:layout="#layout/fragment_navigation_drawer">
</fragment>
</android.support.v4.widget.DrawerLayout>

You should change this method to return actual item count
#Override
public int getItemCount() {
return 0;
}

Android Navigation draw not displaying images and text

I am trying to create a navigation draw which displays text and images. My project builds OK but when I open the navigation draw there is no text or images displayed. I have created a layout file for the image and text to be displayed on the navigation draw and I have set the adapter for the navigation draw as well as creating my own Adapter class.
I cant see what is wrong but something obviously is :) Any help is greatly appreciated.
Here are my files
navigation_draw_items.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- THis file will contain the list of items in the navigation draw -->
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"></LinearLayout>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/imageView"
android:layout_gravity="left" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Medium Text"
android:id="#+id/textView3"
android:layout_gravity="left"/>
</LinearLayout>
activity_main.xml
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- The main content view which will be a fragment-->
<FrameLayout
android:id="#+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- <LinearLayout
android:id="#+id/header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
-->
<ListView android:id="#+id/left_drawer"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:choiceMode="singleChoice"
android:divider="#android:color/transparent"
android:dividerHeight="0dp"
android:background="#ffff"/>
<!-- </LinearLayout> -->
</android.support.v4.widget.DrawerLayout>
AdapterClass.java
public class AdapterClass extends BaseAdapter {
private Context context;
private NavigationItem[] navigationItems;
public AdapterClass(Context context, NavigationItem[] items)
{
this.context = context;
navigationItems = items;
}
#Override
public int getCount() {
return 0;
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row;
if (convertView == null)
{
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.navigation_draw_items, parent,false);
}
else
{
row = convertView;
}
TextView tvTitle = (TextView) row.findViewById(R.id.textView3);
ImageView tvImage = (ImageView) row.findViewById(R.id.imageView);
tvTitle.setText(navigationItems[position].stringTitle);
tvImage.setImageResource(navigationItems[position].drawableIcon);
return row;
}
}
NavigationItem.java
public class NavigationItem {
public NavigationItem(int stringTitle, int drawableIcon)
{
this.stringTitle = stringTitle;
this.drawableIcon = drawableIcon;
}
public int stringTitle;
public int drawableIcon;
}
MainActivity.java
public class MainActivity extends Activity implements EditListFragment.OnFragmentInteractionListener {
//private String[] items;
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
public void onFragmentInteraction(String id)
{
}
#Override
protected void onCreate(Bundle savedInstanceState)
{
// To do
AdapterClass navigationMenuAdapter;
NavigationItem[] navigationMenuItems = {
new NavigationItem(R.string.cat, R.drawable.cat),
new NavigationItem(R.string.dog, R.drawable.dog),
new NavigationItem(R.string.fish, R.drawable.fish),
};
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
navigationMenuAdapter = new AdapterClass(this, navigationMenuItems);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
mDrawerList.setAdapter(navigationMenuAdapter);
mDrawerList.setOnItemClickListener(new DrawItemClickListener());
// Old code
//mDrawerList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, items));
//items = getResources().getStringArray(R.array.items_array);
}
#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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
private class DrawItemClickListener implements ListView.OnItemClickListener
{
#Override
public void onItemClick(AdapterView parent, View view, int position, long id) {
selectedItem(position);
}
}
private void selectedItem(int position)
{
switch (position)
{
case 0:
//Fragment addList = ItemList
//Fragment addList = new ItemList();
//Bundle args = new Bundle();
//args.putInt(ItemList.LIST_NUMBER, position);
//addList.setArguments(args);
Fragment addList = ItemList.newInstance();
FragmentManager addListFragmentManager = getFragmentManager();
addListFragmentManager.beginTransaction().replace(R.id.content_frame, addList).commit();
//mDrawerLayout.closeDrawer(mDrawerLayout);
break;
case 1:
Fragment editList = EditListFragment.newInstance();
FragmentManager editListFragmentManager = getFragmentManager();
editListFragmentManager.beginTransaction().replace(R.id.content_frame, editList).commit();
break;
case 2:
Fragment deleteList = EditListFragment.newInstance();
FragmentManager deleteListFragmentManager = getFragmentManager();
deleteListFragmentManager.beginTransaction().replace(R.id.content_frame, deleteList).commit();
break;
}
}
}

How to start an intent from a linear layout on click inside a class extending fragment

i have a navigation drawer layout created from a NavigationDrawerFragment which extends fragment.I have added android:clickable="true" inside a linear layout in fragment_navigation_drawer as shown below.However i am stuck on how or where to add OnClick event in my NavigationDrawerFragment,or should i do it in another class which extends activity?Thanks in advance.
NavigationDrawerFragment.java:
public class NavigationDrawerFragment extends Fragment {
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private boolean mUserLearnedDrawer;
private boolean mFromSavedInstanceState;
public static final String PREF_FILE_NAME = "testpref";
public static final String KEY_USER_LEARNED_DRAWER = "user_learned_drawer";
private View containerView;
private AdapterClass adapter;
private RecyclerView recyclerView;
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) {
View layout = inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
recyclerView = (RecyclerView) layout.findViewById(R.id.drawerList);
adapter = new AdapterClass(getActivity(), getData());
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
return layout;
}
public static List<Information> getData() {
List<Information> data = new ArrayList<>();
int[] icons = {R.drawable.ic_menu_check, R.drawable.ic_menu_check, R.drawable.ic_menu_check, R.drawable.ic_menu_check};
String[] titles = {"Make up", "Lotions", "Deodorants", "Gels"};
for (int i = 0; i < titles.length && i < icons.length; i++) {
Information current = new Information();
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 + "");
}
}
#Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
}
};
if (!mUserLearnedDrawer && !mFromSavedInstanceState) {
mDrawerLayout.openDrawer(containerView);
}
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerLayout.post(new Runnable() {
#Override
public void run() {
mDrawerToggle.syncState();
}
});
}
#TargetApi(Build.VERSION_CODES.GINGERBREAD)
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);
}
}
fragment_navigation_drawer.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
tools:context="com.snappy.stevekamau.snappy.NavigationDrawerFragment">
<LinearLayout
android:id="#+id/containerDrawerImage"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="wrap_content">
<ImageView
android:layout_width="280dp"
android:layout_height="140dp"
android:background="#000000"
android:src="#drawable/header"></ImageView>
<LinearLayout
android:id="#+id/linear"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:clickable="true"
android:background="#drawable/linear_layout_clicked" >
<ImageView
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_centerVertical="true"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:src="#drawable/basket"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_gravity="center_vertical"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_marginLeft="0dp"
android:text="My Basket"
android:textStyle="bold"
android:textColor="#color/colorSecondaryText"/>
</LinearLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="13dp"
android:layout_marginTop="10dp"
android:textStyle="bold"
android:textSize="16dp"
android:text="Categories" />
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:layout_below="#id/containerDrawerImage"
android:id="#+id/drawerList"
android:layout_marginTop="5dp"
android:background="#ffffff"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v7.widget.RecyclerView>
</RelativeLayout>

The obvious approach is to explicitly set a View.OnClickListener on the relevant widget (i.e. in onCreateView()):
layout.findViewById(R.id.linear).setOnClickListener(new View.OnClickListener() {
#Override public void onClick(View v) {
startActivity(...);
}
});
As far as your question goes:
where to add OnClick event in my NavigationDrawerFragment,or should i do it in another class which extends activity?
The listener really belongs in the class that inflates the layout file. If that's your NavigationDrawerFragment (which appear to be the case), then that's where the listener should live. From there on you can propagate the call elsewhere, but you can start an activity from a fragment just fine.