在android上的textview上水平滚动？

Question

I'm working on a calculator. I noticed that in the default android calc you can scroll the textview horizontally. I looked up the documentation and found out about the attribute android:scrollHorizontally but after adding it to the textview I still cannot do horizontal scroll, there is no further info about it on the documentation leading me to think that only adding the attr should suffice. This is the calculator's textview:

    <TextView android:id="@+id/edit_text"
        android:layout_width="0dip"
        android:layout_height="match_parent"
        android:layout_weight=".8"
        android:singleLine="true"
        android:scrollHorizontally="true"
        android:gravity="center|right"
        android:text="0" />

When characters exceed the textview width the string is trimmed and ... appear at it's end. What am I doing wrong?

Answer 1

<HorizontalScrollView android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <TextView android:layout_width="40dp"
        android:layout_height="wrap_content"
        android:scrollHorizontally="true"
        android:text="Horizontal scroll view will work now"/>

</HorizontalScrollView>

This is how you can make textview scroll horizontally.

Answer 2

I'm a bit late but I managed to achieve same result without adding the HorizontalScrollView

EditText extends TextView to support scrolling and selection. So, you can use the EditText as a TextView (touch, focus and cursor are disabled).

<EditText
    android:id="@+id/edit_text"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/transparent" --> This remove that line at the bottom
    android:clickable="false" --> It can be true if you need to handle click events
    android:cursorVisible="false" --> Hide the cursor
    android:focusable="false" --> Disable focus
    android:singleLine="true"
    android:text="This is a very long text that won't be possible to display in a single line"/>

I'm just not able to test in a wide range of devices... I'm just sharing because it may be useful to someone else.

Answer 3

Just use this

   textview.setMovementMethod(new ScrollingMovementMethod());
   textview.setHorizontallyScrolling(true);

Answer 4

Probably a late answer but it is possible to make a TextView scroll both ways. There is no need for the scrollHorizontally property to be set in the XML or the code.

The following code makes a single-line or a multi-line TextView scroll both vertically and horizontally based on the text content.

<HorizontalScrollView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/toolbar"
        android:scrollbars="none">

        <ScrollView
            android:id="@+id/scroll_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:scrollbars="none">

            <androidx.appcompat.widget.AppCompatTextView
                android:id="@+id/text_content"
                fontPath="fonts/roboto_medium.ttf"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="@color/primary_text"
                android:textSize="14sp" />

        </ScrollView>
</HorizontalScrollView>

Note the layout_width for the ScrollView and TextView are set to wrap_content . The Width for the HorizontalScrollView can either be wrap_content or match_parent and has no effect.