[英]Icon on Toolbar doesn't open Navigation Drawer and doesn't disappear itself when scrolling
我正在嘗試與Tabs一起實現NavigationView。 因此,這是活動代碼:
public class DashBoardActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private Toolbar toolbar;
private ViewPager viewPager;
private TabLayout tabLayout;
private ActionBarDrawerToggle toggle;
private NavigationView navigationView;
private DrawerLayout drawer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
init();
decorate();
setListeners();
}
private void init() {
toolbar = (Toolbar) findViewById(R.id.toolbar);
viewPager = (ViewPager) findViewById(R.id.viewpager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
navigationView = (NavigationView) findViewById(R.id.nav_view);
}
private void decorate() {
setSupportActionBar(toolbar);
setupViewPager(viewPager);
tabLayout.setupWithViewPager(viewPager);
toggle.syncState();
}
private void setListeners() {
drawer.setDrawerListener(toggle);
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getFragmentManager());
adapter.addFrag(new EventsFragment(), getString(R.string.all_events_tab));
adapter.addFrag(new EventsFragment(), getString(R.string.soon_tab));
viewPager.setAdapter(adapter);
}
@Override
public boolean onNavigationItemSelected(MenuItem item) {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
和main_activity.xml層次結構:
<?xml version="1.0" encoding="utf-8"?>
<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:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
... />
</android.support.v4.widget.DrawerLayout>
app_bar_main.xml :
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".activities.DashBoardActivity">
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
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"
app:layout_scrollFlags="scroll|enterAlways|snap"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
有兩個問題:
我在實施過程中錯過了什么? 可能是什么原因?
謝謝!
將這段代碼添加到您的活動中,以解決“漢堡包”圖標的問題。
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
mDrawerLayout.openDrawer(GravityCompat.START); // OPEN DRAWER
return true;
....
}
return super.onOptionsItemSelected(item);
}
對於工具欄部分,您是否嘗試過像這樣放置layout_scrollFlags。
<android.support.v7.widget.Toolbar
...
app:layout_scrollFlags="scroll|enterAlways"/>
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