如何在键盘显示时禁用滚动 ViewPager？

huangapple
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英文:

How to disable scrolling ViewPager while keyboard is shown?

问题

我正在开发一个应用程序，并在其中使用ViewPager。它可以滚动片段，其中一个片段包含文本输入字段。问题是：当键盘显示时，我仍然可以滚动片段。有人遇到过相同的问题吗？

这是我的主活动代码：

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     xmlns:app="http://schemas.android.com/apk/res-auto"
  4.     xmlns:tools="http://schemas.android.com/tools"
  5.     android:layout_width="match_parent"
  6.     android:layout_height="match_parent"
  7.     android:id="@+id/activity_main"
  8.     tools:context=".activities.MainActivity">
  10.     <androidx.viewpager.widget.ViewPager
  11.         android:id="@+id/view_pager"
  12.         android:layout_width="match_parent"
  13.         android:layout_height="match_parent"
  14.         android:layout_above="@id/navigation"
  15.         app:layout_behavior="@string/appbar_scrolling_view_behavior" />
  17.     <com.google.android.material.bottomnavigation.BottomNavigationView
  18.         android:id="@+id/navigation"
  19.         android:layout_width="match_parent"
  20.         android:layout_height="wrap_content"
  21.         android:layout_alignParentBottom="true"
  22.         android:background="?android:attr/windowBackground"
  23.         app:itemBackground="@color/bgBottomNavigation"
  24.         android:foreground="?attr/selectableItemBackground"
  25.         app:itemIconTint="@android:color/white"
  26.         app:itemTextColor="@android:color/white"
  27.         app:menu="@menu/navigation" />
  29. </RelativeLayout>

这是片段代码：

  1. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  2.     xmlns:tools="http://schemas.android.com/tools"
  3.     android:layout_width="match_parent"
  4.     android:layout_height="match_parent"
  5.     tools:context=".fragments.Login">
  7.     <ImageView
  8.         android:id="@+id/loginLogo"
  9.         android:layout_width="match_parent"
  10.         android:layout_height="300dp"
  11.         android:src="@mipmap/logo_foreground"
  12.         tools:ignore="ContentDescription" />
  14.     <EditText
  15.         android:id="@+id/loginUsername"
  16.         android:layout_width="wrap_content"
  17.         android:layout_height="wrap_content"
  18.         android:ems="15"
  19.         android:inputType="textPersonName"
  20.         android:layout_margin="10dp"
  21.         android:layout_below="@+id/loginLogo"
  22.         android:layout_centerHorizontal="true"/>
  24.     <EditText
  25.         android:id="@+id/loginPassword"
  26.         android:layout_width="wrap_content"
  27.         android:layout_height="wrap_content"
  28.         android:ems="15"
  29.         android:inputType="textPassword"
  30.         android:layout_margin="10dp"
  31.         android:layout_below="@+id/loginUsername"
  32.         android:layout_centerHorizontal="true"/>
  34.     <Button
  35.         android:id="@+id/button"
  36.         android:layout_width="wrap_content"
  37.         android:layout_height="wrap_content"
  38.         android:layout_below="@id/loginPassword"
  39.         android:layout_centerHorizontal="true"
  40.         android:layout_margin="10dp"
  41.         android:text="Войти" />
  43. </RelativeLayout>
英文:

I'm developing an app and use ViewPager inside it. It scrolls fragments, one of which contains the text input field. So the problem is the following: while the keyboard is showing I still can scroll fragments. have anybody met the same problem?

This is my Main Activity code:

  1. &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
  2. &lt;RelativeLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
  3.     xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
  4.     xmlns:tools=&quot;http://schemas.android.com/tools&quot;
  5.     android:layout_width=&quot;match_parent&quot;
  6.     android:layout_height=&quot;match_parent&quot;
  7.     android:id=&quot;@+id/activity_main&quot;
  8.     tools:context=&quot;.activities.MainActivity&quot;&gt;
  10.     &lt;androidx.viewpager.widget.ViewPager
  11.         android:id=&quot;@+id/view_pager&quot;
  12.         android:layout_width=&quot;match_parent&quot;
  13.         android:layout_height=&quot;match_parent&quot;
  14.         android:layout_above=&quot;@id/navigation&quot;
  15.         app:layout_behavior=&quot;@string/appbar_scrolling_view_behavior&quot; /&gt;
  17.     &lt;com.google.android.material.bottomnavigation.BottomNavigationView
  18.         android:id=&quot;@+id/navigation&quot;
  19.         android:layout_width=&quot;match_parent&quot;
  20.         android:layout_height=&quot;wrap_content&quot;
  21.         android:layout_alignParentBottom=&quot;true&quot;
  22.         android:background=&quot;?android:attr/windowBackground&quot;
  23.         app:itemBackground=&quot;@color/bgBottomNavigation&quot;
  24.         android:foreground=&quot;?attr/selectableItemBackground&quot;
  25.         app:itemIconTint=&quot;@android:color/white&quot;
  26.         app:itemTextColor=&quot;@android:color/white&quot;
  27.         app:menu=&quot;@menu/navigation&quot; /&gt;
  29. &lt;/RelativeLayout&gt;

And this is the fragment code:

  1. &lt;RelativeLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
  2. xmlns:tools=&quot;http://schemas.android.com/tools&quot;
  3. android:layout_width=&quot;match_parent&quot;
  4. android:layout_height=&quot;match_parent&quot;
  5. tools:context=&quot;.fragments.Login&quot;&gt;
  7. &lt;ImageView
  8.     android:id=&quot;@+id/loginLogo&quot;
  9.     android:layout_width=&quot;match_parent&quot;
  10.     android:layout_height=&quot;300dp&quot;
  11.     android:src=&quot;@mipmap/logo_foreground&quot;
  12.     tools:ignore=&quot;ContentDescription&quot; /&gt;
  14. &lt;EditText
  15.     android:id=&quot;@+id/loginUsername&quot;
  16.     android:layout_width=&quot;wrap_content&quot;
  17.     android:layout_height=&quot;wrap_content&quot;
  18.     android:ems=&quot;15&quot;
  19.     android:inputType=&quot;textPersonName&quot;
  20.     android:layout_margin=&quot;10dp&quot;
  21.     android:layout_below=&quot;@+id/loginLogo&quot;
  22.     android:layout_centerHorizontal=&quot;true&quot;/&gt;
  24. &lt;EditText
  25.     android:id=&quot;@+id/loginPassword&quot;
  26.     android:layout_width=&quot;wrap_content&quot;
  27.     android:layout_height=&quot;wrap_content&quot;
  28.     android:ems=&quot;15&quot;
  29.     android:inputType=&quot;textPassword&quot;
  30.     android:layout_margin=&quot;10dp&quot;
  31.     android:layout_below=&quot;@+id/loginUsername&quot;
  32.     android:layout_centerHorizontal=&quot;true&quot;/&gt;
  34. &lt;Button
  35.     android:id=&quot;@+id/button&quot;
  36.     android:layout_width=&quot;wrap_content&quot;
  37.     android:layout_height=&quot;wrap_content&quot;
  38.     android:layout_below=&quot;@id/loginPassword&quot;
  39.     android:layout_centerHorizontal=&quot;true&quot;
  40.     android:layout_margin=&quot;10dp&quot;
  41.     android:text=&quot;Войти&quot; /&gt;

</RelativeLayout>

答案1

得分: 0

好的，以下是翻译好的部分：

问题的解决方法如下：我创建了一个小函数来隐藏键盘

  1. public static void hideKeyboard(Activity activity) {
  2.     InputMethodManager imm = (InputMethodManager) activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
  3.     // 找到当前获得焦点的视图，以便我们可以从中获取正确的窗口标记。
  4.     View view = activity.getCurrentFocus();
  5.     // 如果当前没有视图获得焦点，就创建一个新的视图，这样我们就可以从中获取窗口标记。
  6.     if (view == null) {
  7.         view = new View(activity);
  8.     }
  9.     imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
  10. }

然后在 ViewPager 的监听器中使用：

  1. viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
  2.     @Override
  3.     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
  4.         hideKeyboard(activity);
  5.     }
  7.     @Override
  8.     public void onPageSelected(int position) {
  9.         if (prevMenuItem != null)
  10.             prevMenuItem.setChecked(false);
  11.         else
  12.              navigation.getMenu().getItem(0).setChecked(false);
  14.         navigation.getMenu().getItem(position).setChecked(true);
  15.         prevMenuItem = navigation.getMenu().getItem(position);
  16.     }
  18.     @Override
  19.     public void onPageScrollStateChanged(int state) {
  21.     }
  22. });
英文:

Well, the problem was solved the next way: I just created a little function to hide the keyboard

  1.  public static void hideKeyboard(Activity activity) {
  2.     InputMethodManager imm = (InputMethodManager) activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
  3.     //Find the currently focused view, so we can grab the correct window token from it.
  4.     View view = activity.getCurrentFocus();
  5.     //If no view currently has focus, create a new one, just so we can grab a window token from it
  6.     if (view == null) {
  7.         view = new View(activity);
  8.     }
  9.     imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
  10. }

And then used the listener of ViewPager:

  1. viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
  2.         @Override
  3.         public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
  4.             hideKeyboard(activity);
  5.         }
  7.         @Override
  8.         public void onPageSelected(int position) {
  9.             if (prevMenuItem != null)
  10.                 prevMenuItem.setChecked(false);
  11.             else
  12.                  navigation.getMenu().getItem(0).setChecked(false);
  14.             navigation.getMenu().getItem(position).setChecked(true);
  15.             prevMenuItem = navigation.getMenu().getItem(position);
  16.         }
  18.         @Override
  19.         public void onPageScrollStateChanged(int state) {
  21.         }
  22.     });

huangapple
  • 本文由 发表于 2020年4月3日 22:23:34
  • 转载请务必保留本文链接：https://go.coder-hub.com/61014021.html
  • android
  • java
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