How to make Android textview selectable and scrolled to bottom (by default)?

Question

I have a textview which text must be selectable textView.setTextIsSelectable(true) and scrollable to bottom by default textView.setMovementMethod(ScrollingMovementMethod.getInstance()).

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorScreenBackground"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.xxxx.xxxx.MainActivity"
    tools:showIn="@layout/activity_main"
    android:orientation="vertical"
    android:weightSum="100">

    <TextView
        android:id="@+id/result"
        android:scrollbars = "vertical"
        android:textSize="16sp"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="40"
        android:elevation="8dp"
        android:textIsSelectable="true"
        android:gravity="bottom"
        android:background="@color/white"
        android:padding="5dp"
        android:focusable="true"
        android:fastScrollEnabled="true"
        android:fastScrollAlwaysVisible="true"
        android:scrollbarSize="7dip"
                android:textAppearance="@style/Base.TextAppearance.AppCompat.Medium" />

    <androidx.core.widget.NestedScrollView
        android:id="@+id/nested_scroll"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="60"
        android:background="@color/gray_background"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recyclerview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:padding="5dp"
            tools:listitem="@layout/recyclerview_item"
            android:background="@color/gray_background"
            />
    </androidx.core.widget.NestedScrollView>
</LinearLayout>

The problem is that the setMovementMethod disable the textview selectability.

How to solve this?

NB: The principal feature required here is that not only the textview must be scrollable, but it must also appeared initially scrolled to bottom by default, and this is provided by the setMovementMethod(ScrollingMovementMethod.getInstance()), according to How to get the Android TextView to scroll down to the end automatically.

Remove setMovementMethod, android:textIsSelectable have the scrolling property in it. — Shamir Kp, Feb 10 '21 at 11:35
The setMovementMethod is needed to make the textview auto scroll down when a text is appended. This functionality is required. — Mahouk, Feb 10 '21 at 22:48
@ShamirKp, so it is not possible to have a textview having the two properties : selectable and auto scroll to bottom ? — Mahouk, Apr 20 '21 at 10:43
Please share the full layout xml so that i can check, because android:textIsSelectable have both selectable and scroll property to it. — Shamir Kp, Apr 21 '21 at 09:27

score 1 · Answer 1 · answered Apr 26 '21 at 07:05

Put your text view inside an scroll view in your xml

<ScrollView
        android:id="@+id/scrollView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="40">
    <TextView
        android:id="@+id/textView"
        android:textSize="16sp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:elevation="8dp"
        android:textIsSelectable="true"
        android:gravity="bottom"
        android:background="@color/white"
        android:padding="5dp"
        android:text="@string/dummy"
        android:focusable="true"
        android:textAppearance="@style/Base.TextAppearance.AppCompat.Medium" />
    </ScrollView>

Then do this in your class

//This will scroll to bottom 
ScrollView scrollView=findViewById(R.id.scrollView);
        scrollView.post(new Runnable() {
            @Override
            public void run() {
                scrollView.fullScroll(ScrollView.FOCUS_DOWN);
            }
        });

How to make Android textview selectable and scrolled to bottom (by default)?

1 Answers1