工具栏汉堡包点击监听器

我正在我的android应用程序中实现类似谷歌播放的持久搜索视图。这是我的代码。

public class NavigationDrawerActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {
    private EditText searchView;
    private ActionBarDrawerToggle toggle;
    private DrawerLayout drawer;
    private TextView appName;
    private boolean isNavigationDrawerOpened;
    @Override
    protected void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_navigation_drawer);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        CoordinatorLayout coordinatorLayout = (CoordinatorLayout)findViewById(R.id.mainLayout);
        coordinatorLayout.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                if(isNavigationDrawerOpened){
                    hideSearchAndEnableAppName();
                }
                return false;
            }
        });
        searchView = (EditText) findViewById(R.id.searchView);
        appName = (TextView) findViewById(R.id.appName);
        searchView.setVisibility(View.GONE);
        drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Toast.makeText(getApplicationContext(),"asdfasdfasdf",Toast.LENGTH_LONG).show();
                return false;
            }
        });
        drawer.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(getApplicationContext(), "asdfasfasdf", Toast.LENGTH_SHORT).show();
            }
        });
        toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);

        drawer.setDrawerListener(toggle);
        toggle.syncState();
        toggle.setToolbarNavigationClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(NavigationDrawerActivity.this,"yayyy mani got it",Toast.LENGTH_LONG).show();
            }
        });
        appName.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (!isNavigationDrawerOpened) {
                    searchView.setVisibility(View.VISIBLE);
                    searchView.requestFocus();
                    appName.setVisibility(View.GONE);
                    isNavigationDrawerOpened = true;
                    animateDrawerIndicator(true);
                    InputMethodManager inputMethodManager=(InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
                    inputMethodManager.toggleSoftInputFromWindow(view.getApplicationWindowToken(), InputMethodManager.SHOW_FORCED, 0);
                }
            }
        });
        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
    }
    private void hideSearchAndEnableAppName() {
        animateDrawerIndicator(false);
        isNavigationDrawerOpened = false;
        searchView.setVisibility(View.GONE);
        appName.setVisibility(View.VISIBLE);
        View view = this.getCurrentFocus();
        if (view != null) {
            InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
        }
    }
    @Override
    public void onBackPressed() {
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        }
        else if(isNavigationDrawerOpened){
            hideSearchAndEnableAppName();
        }else {
            super.onBackPressed();
        }
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()){
            case android.R.id.home:
                drawer.openDrawer(GravityCompat.START);
                Toast.makeText(getApplicationContext(),"asdfasdf",Toast.LENGTH_SHORT).show();
                return true;
            default:
                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) {
        }
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }

    public void animateDrawerIndicator(boolean shouldAnimate) {
        ValueAnimator anim;
        if(shouldAnimate) {
            anim = ValueAnimator.ofFloat(0, 1);
        } else {
            anim = ValueAnimator.ofFloat(1, 0);
        }
        anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator valueAnimator) {
                float slideOffset = (Float) valueAnimator.getAnimatedValue();
                // You should get the drawer layout and
                // toggler from your fragment to make the animation
                toggle
                        .onDrawerSlide(drawer,
                                slideOffset);
            }
        });
        anim.setInterpolator(new DecelerateInterpolator());
        anim.setDuration(500);
        anim.start();
    }
}

这里一切都很好，但当用户点击工具栏上的edittext（根据我的代码）时，我将汉堡图标改为后退按钮。现在，如果用户点击后退按钮，它应该动画返回汉堡，编辑文本应该隐藏（根据我的要求）

但是，要做到这一点，我需要处理汉堡点击。我试过在切换、动作切换等方面使用ClickListners，但没有成功，请帮忙。