不允许用户单击其中一个选项卡

Question

我的屏幕上有 7 个日期选项卡。但是，如果日期在另一个月份，我不允许用户单击该选项卡。我想让它们可见但不可点击。

这是我的代码的一部分：

public void setupViewPager(ViewPager viewPager, ArrayList<String> id, ArrayList<String> tasks,
                           ArrayList<Double> mondayHours, ArrayList<Double> tuesdayHours,
                           ArrayList<Double> wednesdayHours, ArrayList<Double> thursdayHours,
                           ArrayList<Double> fridayHours, ArrayList<Double> saturdayHours,
                           ArrayList<Double> sundayHours) {
    Bundle bundle = new Bundle();
    bundle.putStringArrayList(EXTRA_CHECKED_TASK_ID, id);
    bundle.putStringArrayList(EXTRA_CHECKED_TASKS, tasks);
    bundle.putSerializable(EXTRA_MONDAY, mondayHours);
    bundle.putSerializable(EXTRA_TUESDAY, tuesdayHours);
    bundle.putSerializable(EXTRA_WEDNESDAY, wednesdayHours);
    bundle.putSerializable(EXTRA_THURSDAY, thursdayHours);
    bundle.putSerializable(EXTRA_FRIDAY, fridayHours);
    bundle.putSerializable(EXTRA_SATURDAY, saturdayHours);
    bundle.putSerializable(EXTRA_SUNDAY, sundayHours);

    final String MON = "MON" + "\n" + MainActivity.sevenDatesList.get(0);
    final String TUE = "TUE" + "\n" + MainActivity.sevenDatesList.get(1);
    final String WED = "WED" + "\n" + MainActivity.sevenDatesList.get(2);
    final String THU = "THU" + "\n" + MainActivity.sevenDatesList.get(3);
    final String FRI = "FRI" + "\n" + MainActivity.sevenDatesList.get(4);
    final String SAT = "SAT" + "\n" + MainActivity.sevenDatesList.get(5);
    final String SUN = "SUN" + "\n" + MainActivity.sevenDatesList.get(6);

    adapter = new ViewPagerAdapter(getSupportFragmentManager(), bundle);
    adapter.addFragment(new MondayFragment(), MON);
    adapter.addFragment(new TuesdayFragment(), TUE);
    adapter.addFragment(new WednesdayFragment(), WED);
    adapter.addFragment(new ThursdayFragment(), THU);
    adapter.addFragment(new FridayFragment(), FRI);
    adapter.addFragment(new SaturdayFragment(), SAT);
    adapter.addFragment(new SundayFragment(), SUN);

    viewPager.setAdapter(adapter);
}

这是我的 XML 代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.ada.foresight.TimesheetActivity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:paddingTop="8dp"
        android:paddingBottom="8dp"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin">

        <TextView
            android:id="@+id/lblWeekMsg"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/week"
            android:textAppearance="?attr/textAppearanceListItem" />
        <TextView
            android:id="@+id/lblWeekNo"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_toEndOf="@id/lblWeekMsg"
            android:layout_alignBaseline="@id/lblWeekMsg"
            android:text=""
            android:textAppearance="?attr/textAppearanceListItem" />

    </RelativeLayout>
    <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/coordinator_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="30">

        <android.support.design.widget.AppBarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content" >

            <android.support.design.widget.TabLayout
                android:id="@+id/tab_layout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:tabTextColor="@android:color/white"
                app:tabMode="scrollable"
                app:tabGravity="fill" />

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

        <android.support.v4.view.ViewPager
            android:id="@+id/view_pager"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_behavior="@string/appbar_scrolling_view_behavior" />

    </android.support.design.widget.CoordinatorLayout>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin">

    </RelativeLayout>
</LinearLayout>

我研究了类似的问题，但我们使用不同的方法来创建标签，有些我不明白。 Research 1

Answer 1

这是我在启用或禁用选项卡或自定义选项卡时所做的。

//get tab view
ViewGroup vg = (ViewGroup) tab_event.getChildAt(0);
//get number of tab
int tabsCount = vg.getChildCount();
//loop the tab
for (int j = 0; j < tabsCount; j++) {
    //get view of selected tab
    ViewGroup vgTab = (ViewGroup) vg.getChildAt(j);

    if(j==DESIRED_POSITION){
         //disable the selected tab
         vgTab.setEnable(false);
    }       
}

如果您使用 viewpager 附加，则需要禁用 viewpager 的滑动。如果没有，您仍然可以滑动到禁用选项卡。

Answer 2

刚刚改进了@ZeroOne 的答案：

private void disableTab(int tabNumber)
    {
        ViewGroup vg = (ViewGroup) tabLayout.getChildAt(0);
        ViewGroup vgTab = (ViewGroup) vg.getChildAt(tabNumber);
        vgTab.setEnabled(false);
    }

Answer 3

您可以扩展TabLayout 类并覆盖

void selectTab(final Tab tab, boolean updateIndicator)

方法，像这样：

@Override
void selectTab(final Tab tab, boolean updateIndicator){
    if (tab.getPosition() == <selectable_position>){
      super.selectTab(tab, updateIndicator)
    }
}

但是，您应该知道，此逻辑还将禁用通过ViewPager 滑动到该选项卡。

更多详情请见source。