Disabling navigation drawer, toggling home-button/up-indicator in fragments

Question

The setup

I have an activity whose contentView is an instance of a DrawerLayout, which has a navigation drawer with a drawer indicator displayed in th

Answer 1

You need to disable swipe and disable the actionbar home button:

Use the below code that builds on the code already given to disable swipe

  public void setDrawerState(boolean isEnabled) {
        if ( isEnabled ) {
            mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
            mDrawerToggle.onDrawerStateChanged(DrawerLayout.LOCK_MODE_UNLOCKED);
            mDrawerToggle.setDrawerIndicatorEnabled(true);
            mDrawerToggle.syncState();
            getActivity().getActionBar().setHomeButtonEnabled(true);

        }
        else {
            mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
            mDrawerToggle.onDrawerStateChanged(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
            mDrawerToggle.setDrawerIndicatorEnabled(false);
            mDrawerToggle.syncState();
            getActivity().getActionBar().setHomeButtonEnabled(false);
        }
    }

Answer 2

Short Code

public void setDrawerState(boolean isEnabled) {
    if ( isEnabled ) {
        mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
        drawerToggle.onDrawerStateChanged(DrawerLayout.LOCK_MODE_UNLOCKED);
        drawerToggle.setDrawerIndicatorEnabled(true);
        drawerToggle.syncState();

    }
    else {
        mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
        drawerToggle.onDrawerStateChanged(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
        drawerToggle.setDrawerIndicatorEnabled(false);
        drawerToggle.syncState();
    }
}

Answer 3

Building on answer by @sonida And after using the tweaks given by @luca992 and @jai.

I tried above suggested codes But the "up" or "Back" arrow in left side of action bar was just not showing up in my app. But luckily I was able to fix that.

I had to add this extra line of code in setNavigationDrawerState() [Ref: android.support.v7.app.ActionBarDrawerToggle.setHomeAsUpIndicator ]

toggle.setHomeAsUpIndicator(R.drawable.ic_keyboard_backspace_white_24dp);

I downloaded the drawable: ic_keyboard_backspace_white_24dp from Material.io

Here is the complete code:

MainActivity.java -> onCreate()

DrawerLayout drawer;
ActionBarDrawerToggle toggle;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // Start: Code automatically generated by Android Studio
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.setDrawerListener(toggle);
    toggle.syncState();
    // End: Code automatically generated by Android Studio

    // I had to add this listener as the "back" arrow was totally unresponsive
    // Thanks to @luca992
    toggle.setToolbarNavigationClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            onBackPressed();
        }
    });

    // Start: Code automatically generated by Android Studio
    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);
    // End: Code automatically generated by Android Studio

    // More custom code for other stuff
    // ...
}

MainActivity.java -> setNavigationDrawerState()

public void setNavigationDrawerState(boolean isEnabled) {
if ( isEnabled ) {
    drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
    toggle.setDrawerIndicatorEnabled(true);
    toggle.syncState();
}
else {
    drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
    toggle.setDrawerIndicatorEnabled(false);
    // the extra line of code goes here
    toggle.setHomeAsUpIndicator(R.drawable.ic_keyboard_backspace_white_24dp);    

    toggle.syncState();
}

MainActivity.java -> onBackPressed()

@Override
public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else if(getSupportFragmentManager().getBackStackEntryCount() > 0){
        getSupportFragmentManager().popBackStack();
    }else {
        super.onBackPressed();
    }
}

MainActivity.java -> startFragment() [dummy function for example]

public void startFragment(){
    MyFrag myFrag = new MyFrag();

    getSupportFragmentManager()
        .beginTransaction()
        .replace(R.id.frag_container ,myFrag)
        .addToBackStack(null)
        .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE)
        .commit();
}

MyFrag.java --> onViewCreated()

@Override
public void onViewCreated (View view, Bundle savedInstanceState){
    super.onViewCreated(view, savedInstanceState);

    // Say, using an implemented interface Make call to MainActivitiy's  setNavigationDrawerState() passing false
    // setNavigationDrawerState(false)

    // ...
}

MyFrag.java --> onDestroyView()

@Override
public void onDestroyView(){
    // Say, using an implemented interface Make call to MainActivitiy's setNavigationDrawerState() passing true 
    // setNavigationDrawerState(true)

    super.onDestroyView();
}

Answer 4

This is only part of the solution that I arrived at, but it was quite hard to figure out this bug, so I'm leaving this here for posterity's sake.

This how I was defining the ListView for my navigation drawer:

<ListView
    android:id="@+id/listview_drawer"
    android:layout_width="240dp"
    android:layout_height="match_parent"
    android:layout_gravity="start|bottom"
    android:background="#111"
    android:choiceMode="singleChoice"
    android:divider="@android:color/transparent"
    android:dividerHeight="0dp" />

Even after calling setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED) I was still able to slide the drawer open.

However, after changing the layout_gravity to "start" this problem seems to be resolved.

I was able to reproduce this issue in a sample, navigation-drawer-only app, so it does appear to be a reproducible issue not unique to my situation.

Answer 5

Building on sonida's answer. After calling setDrawerIndicatorEnabled(false), onNavigateUp wasn't being called still. So, I just created a new onClickListener that called it:

public void setDrawerState(boolean isEnabled) {
    if ( isEnabled ) {
        mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
        drawerToggle.setDrawerIndicatorEnabled(true);
        drawerToggle.syncState();

    }
    else {
        mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
        drawerToggle.setDrawerIndicatorEnabled(false);
        drawerToggle.setToolbarNavigationClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onSupportNavigateUp();
            }
        });
        drawerToggle.syncState();
    }
}

also I think

drawerToggle.onDrawerStateChanged(DrawerLayout.LOCK_MODE_UNLOCKED);

has been depreciated, but it works fine without it.