Develop Reference

Back Handling in Fragment While Using Navigation DrawerLayout

I am getting Problem in Navigation drawer if I am clicking any drawer item more than one time (Example 5 times) then on back press I am getting 5 time same fragment.
Suppose first I had click on Fragment one then 5 times on fragment two then after on Back Handling or on Back Pressed first 5 times second fragment has been called and the the fragment one.
I want that if the same no. of fragment I have clicked multiple times the no need to push it on stack.
How to handle this?
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener,HomeListFragment.MyListFragmentListener {
private Stack<Fragment> fragmentStack;
private FragmentManager fragmentManager;
private HomeListFragment homeListFragment;
private ResultListFragment resultListFragment;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
/* FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});*/
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
fragmentStack = new Stack<Fragment>();
homeListFragment = new HomeListFragment();
homeListFragment.registerForListener(this);
fragmentManager = getSupportFragmentManager();
FragmentTransaction ft = fragmentManager.beginTransaction();
ft.add(R.id.container, homeListFragment);
fragmentStack.push(homeListFragment);
ft.commit();
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
if (fragmentStack.size() >1) {
FragmentTransaction ft = fragmentManager.beginTransaction();
fragmentStack.lastElement().onPause();
ft.remove(fragmentStack.pop());
fragmentStack.lastElement().onResume();
ft.show(fragmentStack.lastElement());
ft.commit();
} else {
super.onBackPressed();
}
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.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);
}
#Override
public void onItemClickedListener(String valueClicked) {
Toast.makeText(this, valueClicked, Toast.LENGTH_LONG).show();
FragmentTransaction ft = fragmentManager.beginTransaction();
resultListFragment = new ResultListFragment();
ft.add(R.id.container, resultListFragment);
fragmentStack.lastElement().onPause();
ft.hide(fragmentStack.lastElement());
fragmentStack.push(resultListFragment);
ft.commit();
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
FragmentTransaction ft = fragmentManager.beginTransaction();
One one = new One();
ft.replace(R.id.container, one,"One");
fragmentStack.lastElement().onPause();
ft.hide(fragmentStack.lastElement());
fragmentStack.push(one);
ft.commit();
} else if (id == R.id.nav_gallery) {
FragmentTransaction ft = fragmentManager.beginTransaction();
Two two = new Two();
ft.replace(R.id.container, two,"Two");
fragmentStack.lastElement().onPause();
ft.hide(fragmentStack.lastElement());
fragmentStack.push(two);
ft.commit();
} else if (id == R.id.nav_slideshow) {
FragmentTransaction ft = fragmentManager.beginTransaction();
Three three = new Three();
ft.replace(R.id.container, three,"Three");
fragmentStack.lastElement().onPause();
ft.hide(fragmentStack.lastElement());
fragmentStack.push(three);
ft.commit();
} else if (id == R.id.nav_manage) {
FragmentTransaction ft = fragmentManager.beginTransaction();
Four four = new Four();
ft.replace(R.id.container, four,"Four");
fragmentStack.lastElement().onPause();
ft.hide(fragmentStack.lastElement());
fragmentStack.push(four);
ft.commit();
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
Please Help

//You are using backstack to hold the previous fragments remove all the fragment stacks
One one = new One();
ft.replace(R.id.container, one,"One");
ft.commit();
or you may use below code in backPress method
getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);

You can simply check the current fragment instance is exist or not by tag. Check the fragment is exist or not and then do your logic by that.
Fragment fragment = getFragmentManager().findFragmentByTag("yourstringtag");
if (fragment instanceof yourFragment) {
// No need to commit new one
} else {
// Commit new one
}
Another simple method to solve this issue by using a currentFragment instance. Please consider this as an example logic, I didn't checked it.
private Fragment mFragment;
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
if (!(mFragment instanceof One)) {
FragmentTransaction ft = fragmentManager.beginTransaction();
One one = new One();
ft.replace(R.id.container, one, "One");
fragmentStack.lastElement().onPause();
ft.hide(fragmentStack.lastElement());
fragmentStack.push(one);
mFragment = one;
ft.commit();
}
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}

How to implement onBackPress from fragment in navigation drawer to MainActivity

I want to implement onBackPress to my fragment but i don't know how. When i go to another fragment (in this case, my fragment is the one from my ActivityHome and i'm using standard NavigationDrawer from android stuudio).
Here is my code for ActivityHome
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
FragmentHome fragment = new FragmentHome();
fragmentTransaction.add(R.id.containerID, fragment);
fragmentTransaction.commit();
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_home, 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_logout) {
Toast.makeText(getApplicationContext(),
"Akun anda telah dikeluarkan!", Toast.LENGTH_LONG).show();
Intent logout = new Intent(ActivityHome.this, ActivityMain.class);
startActivity(logout);
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
int id = item.getItemId();
if(id == R.id.nav_home){
ActivityHome.this.getSupportFragmentManager().beginTransaction().replace(R.id.containerID, FragmentHome.newInstance()).commit();
}else if (id == R.id.nav_profile){
ActivityHome.this.getSupportFragmentManager().beginTransaction().replace(R.id.containerID, Profile.newInstance()).commit();
}
else if (id == R.id.nav_history){
ActivityHome.this.getSupportFragmentManager().beginTransaction().replace(R.id.containerID, History.newInstance()).commit();
}
else if (id == R.id.nav_about_us){
ActivityHome.this.getSupportFragmentManager().beginTransaction().replace(R.id.containerID, AboutUs.newInstance()).commit();
}
else if (id == R.id.nav_ganti_kata_sandi){
ActivityHome.this.getSupportFragmentManager().beginTransaction().replace(R.id.containerID, GantiKataSandi.newInstance()).commit();
}
else if (id == R.id.nav_share){
ActivityHome.this.getSupportFragmentManager().beginTransaction().replace(R.id.containerID, Share.newInstance()).commit();
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
I hope u guys can help me with my problem.

I have webview in fragment, I used this code to detect backpress code in mainactivity OnbackPressed():
Fragment webview = getSupportFragmentManager().findFragmentByTag("BLOG");
if (webview instanceof BlogFragment) {
boolean goback = ((BlogFragment) webview).canGoBack();
if (!goback) {
} else {
((BlogFragment) webview).goBack();
}
}
Make sure you start fragment like:
getSupportFragmentManager()
.beginTransaction()
.addToBackStack(null)
.replace(R.id.frame_content, new BlogFragment(), "BLOG")
.commit();

To open fragment from activity.
Fragment fragment = Fragment.newInstance();
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.setCustomAnimations(R.anim.fragment_slide_left_enter,
R.anim.fragment_slide_left_exit, R.anim.fragment_slide_right_enter,
R.anim.fragment_slide_right_exit);
addFragmentToActivity(fragmentTransaction, Fragment, R.id
.content_frame);
public void addFragmentToActivity(#NonNull FragmentTransaction transaction,
#NonNull Fragment fragment, int frameId) {
transaction.addToBackStack(fragment.getClass().getName());
transaction.add(frameId, fragment, fragment.getClass().getName());
transaction.commit();
}
That's how I add fragment from HomeActivity and For back Call override method OnBackPressed in HomeActivity.
#Override
public void onBackPressed() {
if (getSupportFragmentManager().getBackStackEntryCount() > 1) {
getSupportFragmentManager().popBackStackImmediate();
}

You can get event when back button pressed from any fragment in Activity's onBackPressed() method.
Suppose you've pressed back from HomeFragment then you can get onBackPressed in Activity like following :
#Override
public void onBackPressed() {
HomeFragment fragment = (Fragment)findFragmentById(// fragment id);
if(fragment!=null && fragment.isVisible()){
// Here you can code for Home Fragment's onBackPress()
}
super.onBackPressed();
}

How to check menu item in Android Navigation Drawer Template?

I'm using 'com.android.support:appcompat-v7:24.2.1' in my application; therefore, I generated a Navigation Drawer selecting it in the UI.
However, when I click in one item of the menu, it is not getting checked. Below is my code!
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
Fragment fragment = new PainelFragment();
replaceFragment(fragment);
navigationView.getMenu().getItem(0).setChecked(true);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.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);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
Fragment fragment = null;
if (id == R.id.nav_painel) {
// Handle the painel action
fragment = new PainelFragment();
} else if (id == R.id.nav_modelos) {
// Handle the modelos action
fragment = new TabsFragment();
} else if (id == R.id.nav_cronograma) {
// Handle the cronograma action
fragment = new TabsFragment();
} else if (id == R.id.nav_faleConosco) {
// Handle the fale conosco action
fragment = new FaleConoscoFragment();
} else if (id == R.id.nav_perfil) {
// Handle the perfil action
fragment = new PerfilFragment();
} else if (id == R.id.nav_configuracoes) {
// Handle the configuracoes action
Intent intent = new Intent(MainActivity.this, SettingsActivity.class);
startActivity(intent);
}
//replacing the fragment
if (fragment != null) {
replaceFragment(fragment);
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
private void replaceFragment(Fragment f) {
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.content_main, f)
.commit();
}
}

Other Fragment is viewed above the current fragment changes on rotation with android studio navigation drawer template

Thank you for spending time on my qeustion. In my app I am using android studio navigation drawer template.
But the problem is that, when I rotate the phone, the previous fragment's layout is shown above the current fragment.
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
Fragment fragment = null;
Class fragmentClass = null;
/* if (savedInstanceState == null){
try{
fragment = (Fragment) fragmentClass.newInstance();
}catch (Exception e){
e.printStackTrace();
}
}*/
fragment = new Login();
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.fragment, fragment);
fragmentTransaction.commit();
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.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);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
Fragment fragment =null ;
Class fragmentClas = null;
if (id == R.id.nav_camera) {
// Handle the camera action
fragment = new Attendance();
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment, fragment);
fragmentTransaction.commit();
} else if (id == R.id.nav_gallery) {
fragment = new AddStudent();
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment, fragment);
fragmentTransaction.commit();
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
/* FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.flContent, fragment).commit();*/
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}

When you rotate the device, the activity saves its current state and keeps the current fragment then it's destroyed and recreated i.e. onCreate() is called again. You had one fragment before it's destroyed and now it added another in the new call to onCreate() that's why you have 2 fragments. To fix this you should check first if the savedInstanceState parameter in onCreate() is null i.e. it's the first creation of activity not just being restarted due to rotation change or anything, then decide to add the fragment or not instead of adding to whenever the activity calls onCreate()
if(savedInstanceState == null) {
// Add the fragment because it's normal creation
fragment = new Login();
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.fragment, fragment);
fragmentTransaction.commit();
}

Switching and clicking on fragments inside navigation drawer

I have made navigation drawer in Android Studio.
Right now each fragment from drawer is leading to nowhere.
I need to know how can I switch between fragments and click on each one
I know i need to make new fragment, but what method to use so I can click on Settings from navigation drawer so it lead me to fragment Share?
Here is my code;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.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);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}

You are in the right direction. Just add the Fragment class in each of the Navigation items like below
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
Fragment fragment = null;
FragmentManager fragmentManager = getSupportFragmentManager();
if (id == R.id.nav_camera) {
// Handle the camera action
fragment = new DefaultFragment();
fragmentManager.beginTransaction().replace(R.id.first_container, fragment).commit();
} else if (id == R.id.nav_gallery) {
fragment = new ItemListFragment();
fragmentManager.beginTransaction().replace(R.id.first_container, fragment).commit();
}
}
at the end of onCreate(Bundle savedInstanceState)method, you can set the default Fragment to open on Activity load.
FragmentManager fragmentManager = getSupportFragmentManager();
DefaultFragment fragment = new DefaultFragment();
fragmentManager.beginTransaction().replace(R.id.first_container, fragment).commit();

public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.`enter code here`
int id = item.getItemId();
FragmentManager fragmentManager =getSupportFragmentManager();
GoogleMap googleMap =getSupportFragmentManager();
if (id == R.id.alarme){
} else if (id == R.id.map) {
fragmentManager.beginTransaction().replace(R.id.contenedor,new mapposta()).commit();
} else if (id == R.id.parametre) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;