Develop Reference

android fragment view is not shown

I am trying to load a fragment class with webview, by selection from the Navigation view. The main activity layout has a FrameLayout
here is my fragment class
public class HomeFragment extends Fragment {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_home, container, true);
WebView lView = (WebView) v.findViewById(R.id.webPage);
String helpFileName = "homepage.html";
lView.clearHistory();
lView.getSettings().setDomStorageEnabled(true);
lView.getSettings().setJavaScriptEnabled(true);
lView.loadDataWithBaseURL("file:///android_asset/", helpFileName, "text/html", "utf-8", null);
return v;
}
}
Here is my MainActivity Layout
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay">
<android.support.v7.widget.AppCompatTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true"
android:textColor="#android:color/white"
android:textSize="22dp" />
<ImageView
android:layout_width="200dp"
android:layout_height="wrap_content"
android:background="#drawable/white_logo"
android:layout_margin="5dp"/>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<!--<include layout="#layout/content_main" />-->
<FrameLayout
android:id="#+id/flContent"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</android.support.design.widget.CoordinatorLayout>
<android.support.design.widget.NavigationView
android:id="#+id/navigation_view"
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:layout_gravity="start"
app:headerLayout="#layout/nav_header"
app:menu="#menu/menu_navigation"/>
</android.support.v4.widget.DrawerLayout>
here is my MainActivity
public class MainActivity extends FragmentActivity {
private DrawerLayout drawerLayout;
private Toolbar toolbar;
private Menu menu;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
//setSupportActionBar(toolbar);
initNavigationDrawer();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
this.menu = menu;
getMenuInflater().inflate(R.menu.menu_main, menu);
final SearchView searchView = (SearchView) MenuItemCompat.getActionView(menu.findItem(R.id.action_search));
SearchManager searchManager = (SearchManager) getSystemService(SEARCH_SERVICE);
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
MenuItem item = menu.findItem(R.id.action_search);
item.setVisible(true);
item.setEnabled(true);
return true;
}
public void initNavigationDrawer() {
NavigationView navigationView = (NavigationView)findViewById(R.id.navigation_view);
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
selectedDrawerMenu(menuItem);
return true;
}
});
View header = navigationView.getHeaderView(0);
drawerLayout = (DrawerLayout)findViewById(R.id.drawer);
ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.drawer_open,R.string.drawer_close) {
#Override
public void onDrawerClosed(View v){
super.onDrawerClosed(v);
}
#Override
public void onDrawerOpened(View v) {
super.onDrawerOpened(v);
}
};
drawerLayout.addDrawerListener(actionBarDrawerToggle);
actionBarDrawerToggle.syncState();
}
public void selectedDrawerMenu(MenuItem menuItem) {
// Create a new fragment and specify the fragment to show based on nav item clicked
Fragment fragment = null;
Class fragmentClass = null;
int id = menuItem.getItemId();
switch (id){
case R.id.home:
invalidateOptionsMenu();
fragmentClass = HomeFragment.class;
Toast.makeText(getApplicationContext(),"Home",Toast.LENGTH_SHORT).show();
break;
case R.id.u_guide:
invalidateOptionsMenu();
Toast.makeText(getApplicationContext(),"User Guide",Toast.LENGTH_SHORT).show();
break;
case R.id.logout:
Intent in = new Intent(MainActivity.this, PinVerification.class);
startActivity(in);
finish();
}
if(fragmentClass!=null) {
try {
fragment = (Fragment) fragmentClass.newInstance();
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.flContent, fragment).commit();
} catch (Exception e) {
e.printStackTrace();
}
}
drawerLayout.closeDrawers();
}
}
how to show the fragment view within the activity

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;
}

Navigation Drawer not closing

I have implemented a navigationdrawer in android.I don't understand how to close the drawer when a item from the drawer list is selected.The foolowing code gives me a null pointer exception.
The mainactivity:
public class MainActivity extends ActionBarActivity {
String[] planet={"earth","mars","jupiter"};
ListView lv;
DrawerLayout mDrawerLayout;
NavigationDrawerFragment navigationDrawerFragment;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(savedInstanceState==null){
earth earthfrag=new earth();
FragmentManager fragmentManager=getSupportFragmentManager();
FragmentTransaction transaction=fragmentManager.beginTransaction();
transaction.add(R.id.mainactivity,earthfrag,"earth").commit();
}
Toolbar toolbar = (Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
mDrawerLayout=(DrawerLayout)findViewById(R.id.nav_drawer);
navigationDrawerFragment = (NavigationDrawerFragment) getSupportFragmentManager().findFragmentById(R.id.drawer_fragment);
navigationDrawerFragment.setup(mDrawerLayout, toolbar);
lv= (ListView) findViewById(R.id.listView);
lv.setAdapter(new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_list_item_1,planet));
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
FragmentManager fragmentManager=getSupportFragmentManager();
FragmentTransaction transaction=fragmentManager.beginTransaction();
if(position==2){
jupiter jupiterfrag=new jupiter();
transaction.replace(R.id.mainactivity, jupiterfrag, "jupiter").commit();
}
if (position==1){
mars marsfrag=new mars();
transaction.replace(R.id.mainactivity,marsfrag,"mars").commit();
}
if (position==0){
earth earthfrag=new earth();
transaction.replace(R.id.mainactivity,earthfrag,"earth").commit();
}
mDrawerLayout.closeDrawer(lv);
}
});
}
#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);
}
}
The NavigationDrawerFragment :
public class NavigationDrawerFragment extends Fragment {
private ActionBarDrawerToggle mActionBarDrawerToggle;
private DrawerLayout mDrawerLayout;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
return inflater.inflate(R.layout.drawer_fragment,container,false);
}
public void setup(DrawerLayout drawerLayout,Toolbar toolbar) {
mDrawerLayout=drawerLayout;
mActionBarDrawerToggle=new ActionBarDrawerToggle(getActivity(),mDrawerLayout,toolbar,R.string.drawer_open,R.string.drawer_close){
#Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
}
#Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
}
};
mDrawerLayout.setDrawerListener(mActionBarDrawerToggle);
mDrawerLayout.post(new Runnable() {
#Override
public void run() {
mActionBarDrawerToggle.syncState();
}
});
}
}
The activity_main.xml:
<?xml version="1.0"?>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/nav_drawer"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<include
android:id="#+id/app_bar"
layout="#layout/app_bar" />
<RelativeLayout
android:id="#+id/mainactivity"
android:layout_width="match_parent"
android:layout_height="match_parent"></RelativeLayout>
</LinearLayout>
<fragment
android:id="#+id/drawer_fragment"
android:name="com.example.joy.ecoapp.NavigationDrawerFragment"
android:layout_width="280dp"
android:layout_height="match_parent"
android:layout_gravity="start"
tools:layout="#layout/drawer_fragment" />
</android.support.v4.widget.DrawerLayout>

I believe you need to wrap the fragment in a container, e.g. a LinearLayout. Then use that container as the drawer:
<LinearLayout
android:id="#+id/lv_wrapper"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#android:color/background_light"
android:padding="5dp" >
<fragment
android:layout_height="match_parent"
android:layout_width="match_parent"
android:id="#+id/drawer_fragment"
tools:layout="#layout/drawer_fragment"
android:name="com.example.joy.ecoapp.NavigationDrawerFragment" />
</LinearLayout>
Then in your code instead of calling
mDrawerLayout.closeDrawer(lv);
call it with your new wrapper:
mDrawerLayout.closeDrawer(findViewById(R.id.lv_wrapper);

Android Navigation Drawer Content Frame Cannot be resolved

I am using the following code to implement a simple navigation drawer based on the sample given in the Android Developers site.
public class MainActivity extends ActionBarActivity {
Toolbar toolbar;
DrawerLayout mDrawerLayout;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
ListView mDrawerList;
private String[] mDrawerItems;
ActionBarDrawerToggle drawerToggle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
mDrawerItems = getResources().getStringArray(R.array.graph_array);
mDrawerList = (ListView) findViewById(R.id.list_view_drawer);
setSupportActionBar(toolbar);
mTitle = mDrawerTitle = getTitle();
toolbar.setNavigationIcon(R.drawable.ic_menu_white_24dp);
mDrawerLayout = (DrawerLayout) findViewById(R.id.navDrawer);
mDrawerLayout.setStatusBarBackgroundColor(getResources().getColor(R.color.primaryDark));
drawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, toolbar, R.string.abc_action_bar_home_description, R.string.abc_action_bar_home_description) {
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
mDrawerLayout.setDrawerListener(drawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
mDrawerList.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_list_item, mDrawerItems));
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
}
private class DrawerItemClickListener implements ListView.OnItemClickListener {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
}
private void selectItem(int position) {
// update the main content by replacing fragments
//Fragment fragment = new PlanetFragment();
//Bundle args = new Bundle();
//args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);
//fragment.setArguments(args);
if (position == 0) {
Fragment frag1 = new Fragment1();
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.content_frame, frag1).commit();
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
setTitle(mDrawerItems[position]);
mDrawerLayout.closeDrawer(mDrawerList);
} else if (position == 1) {
}
}
#Override
public void setTitle(CharSequence title) {
mTitle = title;
getSupportActionBar().setTitle(mTitle);
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
drawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggls
drawerToggle.onConfigurationChanged(newConfig);
}
#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);
}
public static class PlanetFragment extends Fragment {
public static final String ARG_PLANET_NUMBER = "planet_number";
public PlanetFragment() {
// Empty constructor required for fragment subclasses
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_planet, container, false);
int i = getArguments().getInt(ARG_PLANET_NUMBER);
String planet = getResources().getStringArray(R.array.graph_array)[i];
int imageId = getResources().getIdentifier(planet.toLowerCase(Locale.getDefault()),
"drawable", getActivity().getPackageName());
((ImageView) rootView.findViewById(R.id.image)).setImageResource(imageId);
getActivity().setTitle(planet);
return rootView;
}
}
}
But I get an error saying "content_frame cannot be resolved". How do I fix this ?
EDIT :
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/navDrawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include
android:id="#+id/toolbar"
layout="#layout/toolbar" />
</LinearLayout>
<com.example.shivam.signalprocessing1.ScrimInsetsFrameLayout xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/scrimInsetsFrameLayout"
android:layout_width="320dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#color/white"
android:elevation="10dp"
android:fitsSystemWindows="true"
app:insetForeground="#4000">
<RelativeLayout
android:id="#+id/left_drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#color/white"
android:fitsSystemWindows="true"
android:orientation="vertical">
<ImageView
android:id="#+id/image_view"
android:layout_width="match_parent"
android:layout_height="144dp"
android:scaleType="centerCrop"
android:background="#drawable/material_wallpaper" />
<ListView
android:id="#+id/list_view_drawer"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/image_view"
android:choiceMode="singleChoice" />
</RelativeLayout>
</com.example.shivam.signalprocessing1.ScrimInsetsFrameLayout>
</android.support.v4.widget.DrawerLayout>
Thanks !

Change the id of the frame... its normally container... But change it to content_frame and you are good.

Showing Map in a Fragment

In my application i want to show google map in a Fragment. My activity class is given below.
public class MainActivity extends Activity {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private String[] mPlanetTitles;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTitle = mDrawerTitle = getTitle();
mPlanetTitles = getResources().getStringArray(R.array.planets_array);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START);
mDrawerList.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_list_item, mPlanetTitles));
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_launcher, R.string.app_name,
R.string.action_settings) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_websearch).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
switch (item.getItemId()) {
case R.id.action_websearch:
Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
intent.putExtra(SearchManager.QUERY, getActionBar().getTitle());
if (intent.resolveActivity(getPackageManager()) != null) {
startActivity(intent);
} else {
Toast.makeText(this, "Nothing", Toast.LENGTH_LONG).show();
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private class DrawerItemClickListener implements
ListView.OnItemClickListener {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
selectItem(position);
}
}
private void selectItem(int position) {
onItemSelected(mPlanetTitles[position]);
mDrawerList.setItemChecked(position, true);
setTitle(mPlanetTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}
#Override
public void setTitle(CharSequence title) {
mTitle = title;
getActionBar().setTitle(mTitle);
}
/**
* When using the ActionBarDrawerToggle, you must call it during
* onPostCreate() and onConfigurationChanged()...
*/
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
mDrawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
public void onItemSelected(String link) {
DetailFragment fragment = (DetailFragment) getFragmentManager()
.findFragmentById(R.id.detailFragment);
fragment.setText(link);
}
}
As shown in the code in the Activity i am using a DrawyerLayout inside that there are four items. When the user press the Item. I am showing Fragment where the MapFragment kept inside.
Please see the Main Xml layout file.
<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" >
<FrameLayout
android:id="#+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<fragment
android:id="#+id/detailFragment"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="2"
class="com.example.mynavigation.DetailFragment"
android:visibility="invisible" >
</fragment>
<ListView
android:id="#+id/left_drawer"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#111"
android:choiceMode="singleChoice"
android:divider="#android:color/transparent"
android:dividerHeight="0dp" />
</android.support.v4.widget.DrawerLayout>
My Fragment Class.
public class DetailFragment extends Fragment {
GoogleMap map ;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
System.out.println("kkkkkkkkkkkk");
View view = inflater.inflate(R.layout.fragment_rssitem_detail,
container, true);
return view;
}
public void setText(String item) {
System.out.println("set Tewxt");
TextView view = (TextView) getView().findViewById(R.id.detailsText);
view.setText(item);
}
}
And the fragment_rssitem_detail.xml file
<?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="vertical" >
<TextView
android:id="#+id/detailsText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
android:layout_marginTop="20dip"
android:text="Default Text"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="30dip" />
<FrameLayout
android:id="#+id/map_frame"
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<fragment
android:id="#+id/map"
class="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="8dp" />
</FrameLayout>
<!-- <ListView
android:id="#+id/list_fragment"
android:name="com.myapp.ListFragment"
android:layout_width="wrap_content"
android:layout_height="fill_parent" /> -->
</LinearLayout>

Put only LinearLayout at where you want to put map in your xml and push map programatically as below:
private SupportMapFragment mapFragment;
mapFragment = new SupportMapFragment();
addFragment(lnrMap.getId(), mapFragment); //lnrMap is your LinearLayout from xml.
googleMap = mapFragment.getExtendedMap();
AddFragment Method(),Put this method in your DetailFragment class:
public void addFragment(int layoutId, Fragment fragment) {
FragmentManager fm = getChildFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(layoutId, fragment);
ft.commit();
}