我的HomeScreen.java
public class HomeScreen extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener{
private Toolbar toolbar;
private DrawerLayout drawerLayout;
private NavigationView navigationView;
private ActionBarDrawerToggle toggle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home_screen);
instantiateViews();
toggle = new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.navigation_drawer_open,R.string.navigation_drawer_close);
drawerLayout.addDrawerListener(toggle);
toggle.syncState();
setSupportActionBar(toolbar);
navigationView.setNavigationItemSelectedListener(this);
}
public void instantiateViews(){
toolbar = findViewById(R.id.drawer_menu_toolbar);
drawerLayout = findViewById(R.id.home_screen_main_drawer_layout);
navigationView = findViewById(R.id.home_screen_navigation_view);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (toggle.onOptionsItemSelected(item)) {
Log.i("CLICKED","clicked");
drawerLayout.openDrawer(GravityCompat.START);
return true;
}
return super.onOptionsItemSelected(item);
}
我的问题:
最初单击ActionBarToggle时,导航抽屉未打开。仅当我最初向右滑动时才打开,此后,ActionBarToggle和向右滑动都打开抽屉。仅当应用程序重新启动时,对ActionBarToggle的单击才起作用。因此,我尝试注册ActionBarToggle的点击,并在日志中注册,每当我单击它时,它将显示以下内容
Log.i
2019-06-21 10:00:11.860 7467-7467/com.example.gofresh I/CLICKED: clicked
2019-06-21 10:00:13.282 7467-7467/com.example.gofresh I/chatty: uid=10184(com.example.gofresh) identical 2 lines
2019-06-21 10:00:14.201 7467-7467/com.example.gofresh I/CLICKED: clicked
2019-06-21 10:00:15.031 7467-7467/com.example.gofresh I/CLICKED: clicked
2019-06-21 10:00:15.830 7467-7467/com.example.gofresh I/CLICKED: clicked
2019-06-21 10:00:16.383 7467-7467/com.example.gofresh I/CLICKED: clicked
2019-06-21 10:00:17.920 7467-7467/com.example.gofresh I/chatty: uid=10184(com.example.gofresh) identical 2 lines
2019-06-21 10:00:18.497 7467-7467/com.example.gofresh I/CLICKED: clicked
我应该在onOptionsItemSelected()中放入什么代码,以便ActionBarToggle甚至响应第一次单击?
我的home_screen.xml
<?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/home_screen_main_drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".HomeScreen">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<!--Top Layout-->
<RelativeLayout
android:layout_width="match_parent"
android:layout_alignParentTop="true"
android:layout_height="120dp"
android:background="@color/blue">
<android.support.v7.widget.Toolbar
android:id="@+id/drawer_menu_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<FrameLayout
android:id="@+id/drawer_menu_fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.v7.widget.Toolbar
android:id="@+id/search_toolbar"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_alignParentBottom="true"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="10dp"
android:background="@drawable/seachbar_homescreen"
<EditText
android:id="@+id/searchHere"
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="@drawable/seachbar_homescreen"
android:hint="Search Here"
android:textSize="15sp" />
</android.support.v7.widget.Toolbar>
</RelativeLayout>
</RelativeLayout>
<android.support.design.widget.NavigationView
android:id="@+id/home_screen_navigation_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_gravity="start"
android:visibility="gone"
app:headerLayout="@layout/home_screen_menu_drawer_header"
app:menu="@menu/home_screen_menu_drawer" />
</android.support.v4.widget.DrawerLayout>
最佳答案
它认为您缺少可见性,因为您设置了导航视图。
android:visibility =“ gone”
<?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/home_screen_main_drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".HomeScreen">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<!--Top Layout-->
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="120dp"
android:layout_alignParentTop="true"
android:background="@color/colorPrimary">
<android.support.v7.widget.Toolbar
android:id="@+id/drawer_menu_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<FrameLayout
android:id="@+id/drawer_menu_fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.v7.widget.Toolbar
android:id="@+id/search_toolbar"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_alignParentBottom="true"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="10dp"
android:background="@android:"
<EditText
android:id="@+id/searchHere"
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="@drawable/seachbar_homescreen"
android:hint="Search Here"
android:textSize="15sp" />
</android.support.v7.widget.Toolbar>
</RelativeLayout>
</RelativeLayout>
<!--<android.support.design.widget.NavigationView
android:id="@+id/home_screen_navigation_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_gravity="start"
android:visibility="gone"
app:headerLayout="@layout/home_screen_menu_drawer_header"
app:menu="@menu/home_screen_menu_drawer" />
-->
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="@layout/home_screen_menu_drawer_header"
app:menu="@menu/home_screen_menu_drawer" />
</android.support.v4.widget.DrawerLayout>
在切换问题之前处理代码运行时中的可见性