Android how to call Navigation Drawer from fragment - android-fragments

Question

In my fragment I have material search bar with navigation button(humbugger).
How can I call Navigation Drawer which is in main activity with that humbugger button in my fragment
Do not get how to handle it inside DictionaryFragment
MainActivity:
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
LinearLayout content = (LinearLayout) findViewById(R.id.content);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this,
drawer,
R.string.nav_open_drawer,
R.string.nav_close_drawer){
};
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
DictionaryFragment:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
materialSearchBar = (MaterialSearchBar) RootView.findViewById(R.id.search_bar);
...
materialSearchBar.setOnSearchActionListener(new MaterialSearchBar.OnSearchActionListener() {
#Override
public void onButtonClicked(int buttonCode) {
//***HOW TO HANDLE IT HERE?***
//switch (buttonCode) {
// case MaterialSearchBar.BUTTON_NAVIGATION:
// drawer.openDrawer(Gravity.START);
// break;}
}
});
//return RootView;
}
layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#color/searchBarDividerColor"
tools:context="com.hfad.catchat.DictionaryFragment">
<com.mancj.materialsearchbar.MaterialSearchBar
android:id="#+id/search_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp"
app:mt_hint="Search"
app:mt_navIconEnabled="true"
app:mt_speechMode="false" />
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_search"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layoutManager="android.support.v7.widget.LinearLayoutManager"
app:layout_behavior="#string/appbar_scrolling_view_behavior" >
</android.support.v7.widget.RecyclerView>
</LinearLayout>

Answer 1

This is what you can try where you want to toggle navigation drawer in your fragment, this way you will have to write a method in activity to do whatever you want to do from your fragment, be sure it is a public method:
((MainActivity)getContext()).toggleDrawer();
in your MainActivity:
public void toggleDrawer(){
//do your stuff
}
Other way is callback aka interface (the preferred one), pass that as a parameter in fragment's constructor and consume that where you want to change drawer's state. Like inside your activity:
Callback callback = new Callback(){
#Override
public void onDrawerStateChanged(){
//do your stuff
}};
new DictionaryFragment(callback);
And inside your fragment you will have to write a constructor to accept that callback and save in a local variable :
public DictionaryFragment() {
}
#SuppressLint("ValidFragment")
public DictionaryFragment(Callback callback) {
this.callback = callback;
}
And use it like :
callback.onDrawerStateChanged();
You can also pass parameters to MainActivity both ways.