Android: How to push button above soft keyboard

You need to set your keyboard’s input mode to adjustResize. You can do this adding the following line to your activity’s attributes in the manifest:

    android:windowSoftInputMode="adjustResize"

Here’s an example of the attribute added in the activity:

<activity 
     android:name=".activity.MyActivity"
     android:windowSoftInputMode="adjustResize">
</activity>

Along with Inthathep’s answer, you have to add an attribute in the parent viewgroup

android:fitsSystemWindows="true"

to work it as desired.
i.e, in manifest file , for the activity add

android:windowSoftInputMode="adjustResize"

and
eg.

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="10dp"
    android:fitsSystemWindows="true" <!-- add this -->
    android:orientation="vertical"
    >
    <EditText
        android:id="@+id/et_assetview_comment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:minHeight="80dp"
        android:background="@color/white"
        android:hint="Enter comments"
        />
    <Button
        android:id="@+id/btn_assetview_postcomment"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="POST"
        />
</LinearLayout>

Order your layout like this and you will able to put button to above keyboard

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/button_next"
        android:background="#0ff"
        >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            >

            <EditText
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="250dp"
                android:hint="Hint"
                />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="ABC"
                android:textSize="50sp"
                />
        </LinearLayout>
    </ScrollView>

    <Button
        android:id="@+id/button_next"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_alignParentBottom="true"
        android:layout_margin="10dp"
        android:text="Button Next"
        />

</RelativeLayout>

In android manifest

<application
        ...
        >
        <activity android:name=".YourActivity"
            android:windowSoftInputMode="adjustResize"
           >
        </activity>
</application>

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Note that, instead of RelativeLayout, you can also use another ViewGroup like LinearLayout with weight, CordinatorLayout, …