How do I completely prevent a TextView from scrolling?

问题

I have a TextView with a lot of text. This TextView has maxLines set, so it only shows the first 8 or so lines. I also have a "Read More" button so I handle expanding the TextView on my own.

My problem is that sometimes the TextView scrolls a little (just half a line at a time), even though I never specified any scroll bars. This issue is made worse because the TextView is inside a ListView, so when the user scrolls the main ListView, the TextView sometimes scrolls a little, like this:

How do I prevent the TextView from scrolling?

回答1:

I have the same problem,My solution is create a NoScrollTextView extends TextView like this

 public class NoScrollTextView extends TextView {
    public NoScrollTextView(Context context) {
        super(context);
    }

    public NoScrollTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public NoScrollTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public NoScrollTextView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    @Override
    public void scrollTo(int x, int y) {
        //do nothing
    }
}

set scrollTo do nothing

In Kotlin:

class NonScrollingTextView : TextView {
    constructor(context: Context) : super(context) {}
    constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {}
    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {}
    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int, defStyleRes: Int) : super(context, attrs, defStyleAttr, defStyleRes) {
    }

    override fun scrollTo(x: Int, y: Int) {
        //do nothing
    }
}

回答2:

So I did a little research and I don't think it's as simple as just disabling scrolling, but there are a few things you can do/try.

The first is setEnabled(false) but this will disable links and alter the text color.

The second, which I suggest trying, is using the scrollTo(int x, int y) method. Just scrollTo(0,0) after setting the text of the TextView, my guess is the large text is the only thing causing the scrolling so this should be able to take care of it.

The third answer I found that you can try is a bit more complicated and not exactly your question but it may work for you can be found here.

public class LinkMovementMethodOverride implements View.OnTouchListener{

@Override
public boolean onTouch(View v, MotionEvent event) {
    TextView widget = (TextView) v;
    Object text = widget.getText();
    if (text instanceof Spanned) {
        Spanned buffer = (Spanned) text;

        int action = event.getAction();

        if (action == MotionEvent.ACTION_UP
                || action == MotionEvent.ACTION_DOWN) {
            int x = (int) event.getX();
            int y = (int) event.getY();

            x -= widget.getTotalPaddingLeft();
            y -= widget.getTotalPaddingTop();

            x += widget.getScrollX();
            y += widget.getScrollY();

            Layout layout = widget.getLayout();
            int line = layout.getLineForVertical(y);
            int off = layout.getOffsetForHorizontal(line, x);

            ClickableSpan[] link = buffer.getSpans(off, off,
                    ClickableSpan.class);

            if (link.length != 0) {
                if (action == MotionEvent.ACTION_UP) {
                    link[0].onClick(widget);
                } else if (action == MotionEvent.ACTION_DOWN) {                             
                    // Selection only works on Spannable text. In our case setSelection doesn't work on spanned text
                    //Selection.setSelection(buffer, buffer.getSpanStart(link[0]), buffer.getSpanEnd(link[0]));
                }
                return true;
            }
        }

    }

    return false;
}

}

"After that apply it to the target textview as touch listener: -

textview.setOnTouchListener(new LinkMovementMethodOverride());"

回答3:

I needed feature like see more in my project and I used ellipsizing textview from this SO post. It works like a charm and also provides an interface for checking if the text was ellipsized. This should do the trick.

回答4:

Just use setMinLines() to always display whole text

回答5:

Try these lines of code in xml

android:isScrollContainer="false"
android:ellipsize="end"

来源：https://stackoverflow.com/questions/24027108/how-do-i-completely-prevent-a-textview-from-scrolling