android move layout up when soft keyboard is shown with viewpagers with code solution

Android provides a way to detect when the soft keyboard is shown and hide using the View.OnLayoutChangeListener interface. One common use case for this is to adjust the layout of an activity when the keyboard is shown, such as moving a layout up to make sure that it is not obscured by the keyboard.

In this article, we will show how to move a layout up when the soft keyboard is shown, while also using ViewPagers.

First, we need to create a layout that contains a ViewPager and a layout that we want to move up when the keyboard is shown. For this example, we will use a LinearLayout as the layout that we want to move up:

<LinearLayout
    android:id="@+id/main_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <androidx.viewpager.widget.ViewPager
        android:id="@+id/view_pager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <LinearLayout
        android:id="@+id/bottom_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:padding="16dp">

        <!-- other views here -->

    </LinearLayout>
</LinearLayout>

Next, we need to set an OnLayoutChangeListener on the root layout of the activity, in this case, the main_layout LinearLayout:

LinearLayout mainLayout = findViewById(R.id.main_layout);
mainLayout.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
    @Override
    public void onLayoutChange(View view, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
        // code to move layout up when keyboard is shown here
    }
});

Inside the onLayoutChange method, we need to check if the keyboard is shown and move the bottom_layout LinearLayout up accordingly. We can do this by checking the height of the main_layout before and after the keyboard is shown and moving the bottom_layout up by the difference:

int mainLayoutHeight = mainLayout.getHeight();
int bottomLayoutHeight = bottomLayout.getHeight();

int keyboardHeight = mainLayoutHeight - (bottom + top);
if (keyboardHeight > bottomLayoutHeight) {
    bottomLayout.setTranslationY(-keyboardHeight);
} else {
    bottomLayout.setTranslationY(0);
}

In this example, we are using the setTranslationY method to move the bottom_layout up by the keyboard height. This method allows us to move the layout up without changing its layout parameters.

Finally, we need to make sure that the viewpager is still functional when the layout is moved up. To do this, we need to set the layout_height of the viewpager to 0dp and give it a layout_weight of 1. This will ensure that the viewpager takes up all the remaining space in the layout.

The full code would look like this:

In addition to moving a layout up when the soft keyboard is shown, there are a few other things to consider when working with ViewPagers and the keyboard.

One important thing to keep in mind is that when the keyboard is shown, it may cover up the current page of the ViewPager, making it difficult for the user to interact with the page. To prevent this, you can set the android:windowSoftInputMode attribute in the AndroidManifest.xml file to adjust how the window is resized when the keyboard is shown. 

For example, you can set it to "adjustResize" which will resize the window so that the content does not get covered by the keyboard. 



Another thing to consider is that when the keyboard is shown, the user may not be able to scroll through the pages of the ViewPager. To fix this, you can set the android:descendantFocusability attribute of the ViewPager's parent layout to "beforeDescendants". This will allow the ViewPager to receive focus and scroll even when the keyboard is shown.

<LinearLayout
android:descendantFocusability="beforeDescendants"
…>

<androidx.viewpager.widget.ViewPager
    android:id="@+id/view_pager"
    ... />


“`

Another thing to consider is the focus management. When an EditText view is focused, the soft keyboard appears and the layout is pushed up. To prevent this and keep the layout in place, you can use requestFocus() function for other elements such as button or view, when the layout is pushed up, the focus will be on that element and the keyboard will not appear.

Button button = findViewById(R.id.your_button);
button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        button.requestFocus();
    }
});

By following these tips, you can create a smooth and user-friendly experience for your users when working with ViewPagers and the soft keyboard in your Android app.

Popular questions

  1. What is the purpose of moving a layout up when the soft keyboard is shown in an Android app?
  • The purpose of moving a layout up when the soft keyboard is shown is to prevent the layout from being obscured by the keyboard, making it difficult for the user to interact with the layout's views.
  1. How can you detect when the soft keyboard is shown in an Android app?
  • You can detect when the soft keyboard is shown in an Android app by using the View.OnLayoutChangeListener interface and adding an OnLayoutChangeListener to the root layout of the activity.
  1. How can you move a layout up when the soft keyboard is shown, while also using ViewPagers in an Android app?
  • To move a layout up when the soft keyboard is shown, while also using ViewPagers in an Android app, you can use the View.OnLayoutChangeListener interface to detect when the keyboard is shown and then use the setTranslationY method to move the desired layout up by the keyboard height.
  1. What is the android:windowSoftInputMode attribute used for in an Android app?
  • The android:windowSoftInputMode attribute is used in an Android app to adjust how the window is resized when the keyboard is shown. This can be useful to prevent the content from getting covered by the keyboard.
  1. Why is the android:descendantFocusability attribute useful when working with ViewPagers and the soft keyboard in an Android app?
  • The android:descendantFocusability attribute is useful when working with ViewPagers and the soft keyboard in an Android app, because it allows the ViewPager to receive focus and scroll even when the keyboard is shown. This prevents the user from not being able to scroll through the pages of the ViewPager when the keyboard is shown.

Tag

KeyboardAdjustment

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