为什么日历在导航抽屉不工作？ [英] Why is Calendar in Navigation Drawer not working?

问题描述

以下是我的日历代码

  public class Calender extends android.support.v4.app.Fragment {
 CalendarView日历; 
 public Calender（）{
 //必需的空公共构造函数
} 
 @Override 
 public View onCreateView（LayoutInflater inflater，ViewGroup container，
 Bundle savedInstanceState ）{
 super.onCreate（savedInstanceState）; 
查看fragmentRootView = inflater.inflate（R.layout.fragment_calender，container，false）; 
 
 calendar =（CalendarView）fragmentRootView.findViewById（R.id.calendar）; 
 calendar.setShowWeekNumber（false）; 
 calendar.setFirstDayOfWeek（2）; 
 calendar.setSelectedWeekBackgroundColor（getResources（）。getColor（R.color.green））; 
 calendar.setUnfocusedMonthDateColor（getResources（）。getColor（R.color.transparent））; 
 calendar.setWeekSeparatorLineColor（getResources（）。getColor（R.color.transparent））; 
 calendar.setSelectedDateVerticalBar（R.color.darkgreen）; 
 calendar.setOnDateChangeListener（new OnDateChangeListener（）{
 @Override 
 public void onSelectedDayChange（CalendarView view，int year，int month，int day）{
 Toast.makeText（getApplicationContext ），day +/+ month +/+ year，Toast.LENGTH_LONG）.show（）; 
} 
} 
 
 return fragmentRootView; 
} 
 
} 
  

getApplicationContext （），
，下面是MainActivity.java上的代码，我试图创建一个片段，以便从导航栏打开日历

  navigationView.setNavigationItemSelectedListener（new NavigationView.OnNavigationItemSelectedListener（）{
 @Override 
 public boolean onNavigationItemSelected（MenuItem item）{
 switch（item.getItemId b $ b {
 case R.id.calendar：
 fragmentTransaction = getSupportFragmentManager（）。beginTransaction（）; 
 fragmentTransaction.replace（R.id.main_container，new Calender（））; 
 fragmentTransaction.commit（）; 
 getSupportActionBar（）。setTitle（Calender）; 
 item.setChecked（true）; 
 break; 
 // drawer.closeDrawers （）; 
 
} 
 return true; 
} 
}）; 
  

我已经为日历创建了一个新的xml文件，我在主xml中使用框架布局。

 <？xml version =1.0encoding =utf-8？& 
  

 $ c>< RelativeLayout 
 android：layout_width =match_parent
 android：layout_height =match_parent> 
 
< android.support.design.widget.TabLayout 
 android：id =@ + id / tab_layout
 android：layout_width =match_parent
 ：layout_height =wrap_content
 android：layout_alignParentLeft =true
 android：layout_alignParentRight =true
 android：background =@ color / colorPrimary
 android：minHeight = ？attr / actionBarSize
 app：tabGravity =fill
 app：tabIndicatorColor =@ color / colorAccent
 app：tabSelectedTextColor =@ color / tabTextColor
 ：tabTextColor =＃FFF> 
 
< /android.support.design.widget.TabLayout> 
 
< android.support.v4.view.ViewPager 
 android：id =@ + id / view_pager
 android：layout_width =match_parent
 ：layout_height =match_parent
 android：layout_alignParentBottom =true
 android：layout_below =@ + id / tab_layout> 
 
 
 
< /android.support.v4.view.ViewPager> 
 
< ListView 
 android：layout_width =wrap_content
 android：layout_height =wrap_content
 android：id =@ + id / lvPump
 android：layout_centerHorizo​​ntal =true
 android：layout_below =@ + id / tab_layout/> 
 
 
 
 
< / RelativeLayout> 
< FrameLayout 
 android：layout_width =match_parent
 android：layout_height =match_parent
 android：id =@ + id / main_container>< / FrameLayout> ; 
 
< android.support.design.widget.NavigationView 
 android：id =@ + id / navigation_view
 android：layout_width =wrap_content
 ：layout_height =match_parent
 android：layout_gravity =start
 app：headerLayout =@ layout / navigation_header
 app：menu =@ menu / navigation_item> 
 
< /android.support.design.widget.NavigationView> 
  

解决方案>

在Fragment中没有方法 getApplicationContext（）。如果要访问本地上下文，请写 getActivity（）而不是 getApplicationContext（）。

The following is my code for my Calendar

public class Calender extends android.support.v4.app.Fragment {
CalendarView calendar;
public Calender() {
    // Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState)  {
    super.onCreate(savedInstanceState);
   View fragmentRootView = inflater.inflate(R.layout.fragment_calender, container, false);

    calendar = (CalendarView) fragmentRootView.findViewById(R.id.calendar);
    calendar.setShowWeekNumber(false);
    calendar.setFirstDayOfWeek(2);
    calendar.setSelectedWeekBackgroundColor(getResources().getColor(R.color.green));
    calendar.setUnfocusedMonthDateColor(getResources().getColor(R.color.transparent));
    calendar.setWeekSeparatorLineColor(getResources().getColor(R.color.transparent));
    calendar.setSelectedDateVerticalBar(R.color.darkgreen);
    calendar.setOnDateChangeListener(new OnDateChangeListener() {
        @Override
        public void onSelectedDayChange(CalendarView view, int year, int month, int day) {
            Toast.makeText(getApplicationContext(), day + "/" + month + "/" + year, Toast.LENGTH_LONG).show();
        }
    });

    return fragmentRootView;
}

}

There is an error in the getApplicationContext() , and the following is the code on MainActivity.java, im trying to create a fragment in order to open a calendar from a navigation drawer

navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(MenuItem item) {
            switch (item.getItemId())
            {
                case R.id.calendar:
                    fragmentTransaction = getSupportFragmentManager().beginTransaction();
                    fragmentTransaction.replace(R.id.main_container,  new Calender());
                    fragmentTransaction.commit();
                    getSupportActionBar().setTitle("Calender");
                    item.setChecked(true);
                    break;
               // drawer.closeDrawers();

            }
            return true;
        }
    });

I have created a new xml file for the calendar too, and am using frame layout in the main xml.

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.TabLayout
        android:id="@+id/tab_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:background="@color/colorPrimary"
        android:minHeight="?attr/actionBarSize"
        app:tabGravity="fill"
        app:tabIndicatorColor="@color/colorAccent"
        app:tabSelectedTextColor="@color/tabTextColor"
        app:tabTextColor="#FFF">

    </android.support.design.widget.TabLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/view_pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentBottom="true"
        android:layout_below="@+id/tab_layout">



    </android.support.v4.view.ViewPager>

    <ListView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/lvPump"
        android:layout_centerHorizontal="true"
        android:layout_below="@+id/tab_layout" />




</RelativeLayout>
<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/main_container"></FrameLayout>

<android.support.design.widget.NavigationView
    android:id="@+id/navigation_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    app:headerLayout="@layout/navigation_header"
    app:menu="@menu/navigation_item">

</android.support.design.widget.NavigationView>

解决方案

There is no method getApplicationContext() in Fragment. If you want to get access to local context, write getActivity() instead of getApplicationContext().

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