使 TextView 可在 Android 上滚动

Question

I am displaying text in a TextView that appears to be too long to fit into one screen. I need to make my TextView scrollable. How can I do that?

Here is the code:

final TextView tv = new TextView(this);
tv.setBackgroundResource(R.drawable.splash);
tv.setTypeface(face);
tv.setTextSize(18);
tv.setTextColor(R.color.BROWN);
tv.setGravity(Gravity.CENTER_VERTICAL| Gravity.CENTER_HORIZONTAL);
tv.setOnTouchListener(new OnTouchListener() {
    public boolean onTouch(View v, MotionEvent e) {
        Random r = new Random();
        int i = r.nextInt(101);
        if (e.getAction() == e.ACTION_DOWN) {
            tv.setText(tips[i]);
            tv.setBackgroundResource(R.drawable.inner);
        }
        return true;
    }
});
setContentView(tv);

Answer 1

You don't need to use a ScrollView actually.

Just set the

android:scrollbars = "vertical"

properties of your TextView in your layout's xml file.

Then use:

yourTextView.setMovementMethod(new ScrollingMovementMethod());

in your code.

Bingo, it scrolls!

Answer 2

This is how I did it purely in XML:

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

    <ScrollView
        android:id="@+id/SCROLLER_ID"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:scrollbars="vertical"
        android:fillViewport="true">

        <TextView
            android:id="@+id/TEXT_STATUS_ID"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="1.0"/>
    </ScrollView>
</LinearLayout>

NOTES:

1. android:fillViewport="true" combined with android:layout_weight="1.0" will make the textview take up all available space.

2. When defining the Scrollview, DO NOT specify android:layout_height="fill_parent" otherwise the scrollview doesn't work! (this has caused me to waste an hour just now! FFS).

PRO TIP:

To programmatically scroll to the bottom after appending text, use this:

mTextStatus = (TextView) findViewById(R.id.TEXT_STATUS_ID);
mScrollView = (ScrollView) findViewById(R.id.SCROLLER_ID);

private void scrollToBottom()
{
    mScrollView.post(new Runnable()
    {
        public void run()
        {
            mScrollView.smoothScrollTo(0, mTextStatus.getBottom());
        }
    });
}

Answer 3

All that is really necessary is the setMovementMethod(). Here's an example using a LinearLayout.

File main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
    android:id="@+id/tv1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:text="@string/hello"
    />
</LinearLayout>

File WordExtractTest.java

public class WordExtractTest extends Activity {

    TextView tv1;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        tv1 = (TextView)findViewById(R.id.tv1);

        loadDoc();
    }

    private void loadDoc() {

        String s = "";

        for(int x=0; x<=100; x++) {
            s += "Line: " + String.valueOf(x) + "\n";
        }

        tv1.setMovementMethod(new ScrollingMovementMethod());

        tv1.setText(s);
    }
}

Answer 4

Make your textview just adding this

TextView textview= (TextView) findViewById(R.id.your_textview_id);
textview.setMovementMethod(new ScrollingMovementMethod());

Answer 5

It is not necessary to put in

android:Maxlines="AN_INTEGER"`

You can do your work by simply adding:

android:scrollbars = "vertical"

And, put this code in your Java class:

textview.setMovementMethod(new ScrollingMovementMethod());

Answer 6

You can either

1. surround the TextView by a ScrollView ; or
2. set the Movement method to ScrollingMovementMethod.getInstance(); .

Answer 7

The best way I found:

Replace the TextView with an EditText with these extra attributes:

android:background="@null"
android:editable="false"
android:cursorVisible="false"

There is no need for wrapping in a ScrollView.

Answer 8

Simple. This is how I did it:

1. XML Side:

    <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" tools:context="com.mbh.usbcom.MainActivity"> <TextView android:id="@+id/tv_log" android:layout_width="match_parent" android:layout_height="wrap_content" android:scrollbars="vertical" android:text="Log:" /> </RelativeLayout>

2. Java side:

    tv_log = (TextView) findViewById(R.id.tv_log); tv_log.setMovementMethod(new ScrollingMovementMethod());

Bonus:

To let the text view scroll down as the text fill it, you have to add:

    android:gravity="bottom"

to the TextView xml file. It will scroll down automatically as more text comes in.

Of course you need to add the text using the append function instead of set text:

    tv_log.append("\n" + text);

I used it for Log purpose.

I hope this helps ;)

Answer 9

This is "How to apply ScrollBar to your TextView", using only XML.

First, you need to take a Textview control in the main.xml file and write some text into it ... like this:

<TextView
    android:id="@+id/TEXT"
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    android:text="@string/long_text"/>

Next, place the text view control in between the scrollview to display the scroll bar for this text:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_height="wrap_content"
    android:layout_width="fill_parent">

    <ScrollView
        android:id="@+id/ScrollView01"
        android:layout_height="150px"
        android:layout_width="fill_parent">

        <TextView
            android:id="@+id/TEXT"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:text="@string/long_text"/>

    </ScrollView>
</RelativeLayout>

That's it...

Answer 10

This will provide smooth scrolling text with a scroll bar.

ScrollView scroller = new ScrollView(this);
TextView tv = new TextView(this);
tv.setText(R.string.my_text);
scroller.addView(tv);

Answer 11

The "pro tip" above from Someone Somewhere ( Making TextView scrollable on Android ) works great, however, what if you're dynamically adding text to the ScrollView and would like to automatically scroll to the bottom after an append only when the user is at the bottom of the ScrollView? (Perhaps because if the user has scrolled up to read something you don't want to automatically reset to the bottom during an append, which would be annoying.)

Anyway, here it is:

if ((mTextStatus.getMeasuredHeight() - mScrollView.getScrollY()) <=
        (mScrollView.getHeight() + mTextStatus.getLineHeight())) {
    scrollToBottom();
}

The mTextStatus.getLineHeight() will make it so that you don't scrollToBottom() if the user is within one line from the end of the ScrollView.

Answer 12

If you want text to be scrolled within the textview, then you can follow the following:

First you should have to subclass textview.

And then use that.

Following is an example of a subclassed textview.

public class AutoScrollableTextView extends TextView {

    public AutoScrollableTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        setEllipsize(TruncateAt.MARQUEE);
        setMarqueeRepeatLimit(-1);
        setSingleLine();
        setHorizontallyScrolling(true);
    }

    public AutoScrollableTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        setEllipsize(TruncateAt.MARQUEE);
        setMarqueeRepeatLimit(-1);
        setSingleLine();
        setHorizontallyScrolling(true);
    }

    public AutoScrollableTextView(Context context) {
        super(context);
        setEllipsize(TruncateAt.MARQUEE);
        setMarqueeRepeatLimit(-1);
        setSingleLine();
        setHorizontallyScrolling(true);
    }

    @Override
    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
        if(focused)
            super.onFocusChanged(focused, direction, previouslyFocusedRect);
    }

    @Override
    public void onWindowFocusChanged(boolean focused) {
        if(focused)
            super.onWindowFocusChanged(focused);
    }

    @Override
    public boolean isFocused() {
        return true;
    }
}

Now, you have to use that in the XML in this way:

 <com.yourpackagename.AutoScrollableTextView
     android:layout_width="fill_parent"
     android:layout_height="wrap_content"
     android:text="This is very very long text to be scrolled"
 />

That's it.

Answer 13

Add the following in the textview in XML.

android:scrollbars="vertical"

And finally, add

textView.setMovementMethod(new ScrollingMovementMethod());

in the Java file.

Answer 14

In kotlin for making the textview scrollable

myTextView.movementMethod= ScrollingMovementMethod()

and also add in xml this property

    android:scrollbars = "vertical"

Answer 15

I didn't find TextView scrolling to support the 'fling' gesture, where it continues scrolling after a flick up or down. I ended up implementing that myself because I didn't want to use a ScrollView for various reasons, and there didn't seem to be a MovementMethod that both allowed me to select text and click on links.

Answer 16

完成可滚动后，当您在视图中输入任何内容时，将此行添加到视图的最后一行：

((ScrollView) findViewById(R.id.TableScroller)).fullScroll(View.FOCUS_DOWN);

Answer 17

If you don't want to use the EditText solution then you might have better luck with:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.yourLayout);
    (TextView)findViewById(R.id.yourTextViewId).setMovementMethod(ArrowKeyMovementMethod.getInstance());
}

Answer 18

Add this to your XML layout:

android:ellipsize="marquee"
android:focusable="false"
android:marqueeRepeatLimit="marquee_forever"
android:scrollHorizontally="true"
android:singleLine="true"
android:text="To Make An textView Scrollable Inside The TextView Using Marquee"

And in code you have to write the following lines:

textview.setSelected(true);
textView.setMovementMethod(new ScrollingMovementMethod());

Answer 19

The code below creates an automatic horizontal scrolling textview:

While adding TextView to xml use

<TextView android:maxLines="1" 
          android:ellipsize="marquee"
          android:scrollHorizontally="true"/>

Set the following properties of TextView in onCreate()

tv.setSelected(true);
tv.setHorizontallyScrolling(true); 

Answer 20

I had this problem when I was using TextView inside the ScrollView . This solution has worked for me.

scrollView.setOnTouchListener(new View.OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {

                description.getParent().requestDisallowInterceptTouchEvent(false);

                return false;
            }
        });

        description.setOnTouchListener(new View.OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {

                description.getParent().requestDisallowInterceptTouchEvent(true);

                return false;
            }
        });

Answer 21

yourtextView.setMovementMethod(new ScrollingMovementMethod());

你现在可以滚动它。

Answer 22

Use it like this

<TextView  
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:maxLines = "AN_INTEGER"
    android:scrollbars = "vertical"
/>

Answer 23

Put maxLines and scrollbars inside TextView in xml.

<TextView android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:scrollbars="vertical"
    android:maxLines="5" // any number of max line here.
    />

Then in java code.

textView.setMovementMethod(new ScrollingMovementMethod());

Answer 24

whenever you need to use the ScrollView as parent , And you also use the scroll movement method with TextView.

And When you portrait to landscape your device that time occur some issue . (like) entire page is scrollable but scroll movement method can't work.

if you still need to use ScrollView as parent or scroll movement method then you also use below desc.

If you do not have any problems then you use EditText instead of TextView

see below :

<EditText
     android:id="@+id/description_text_question"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:background="@null"
     android:editable="false"
     android:cursorVisible="false"
     android:maxLines="6"/>

Here, the EditText behaves like TextView

And your issue will be resolved

Answer 25

If you use Kotlin , in this way : XML

 <TextView
            android:id="@+id/tvMore"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:maxLines="3"
            android:scrollbars="vertical" />

Activity

tvMore.movementMethod = ScrollingMovementMethod()

Answer 26

I know this is an older post, but this is how I am handling the issue on the Java side.

    // Allow textView to scroll
    tv.setSingleLine(true);
    tv.setHorizontallyScrolling(true);
    tv.setEllipsize(TextUtils.TruncateAt.MARQUEE);
    tv.setMarqueeRepeatLimit(-1); // Infinite
    // TextView must be 'selected'
    tv.setSelected(true);
    // Padding not necessary, but this helps so the text isn't right
    // up against the side of a screen/layout
    tv.setPadding(10, 0, 10, 0);

Answer 27

Here is the answer in the wonderful and happy world of JetPack Compose:

LazyColumn {
        item {
            Text(
                text = "My Long Text"
            )
        }
    }

Answer 28

I struggled with this for over a week and finally figured out how to make this work!

My issue was that everything would scroll as a 'block'. The text itself was scrolling, but as a chunk rather than line by line. This obviously didn't work for me, because it would cut off lines at the bottom. All of the previous solutions did not work for me, so I crafted my own.

Here is the easiest solution by far:

Make a class file called: 'PerfectScrollableTextView' inside a package, then copy and paste this code in:

import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.widget.TextView;

public class PerfectScrollableTextView extends TextView {

    public PerfectScrollableTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        setVerticalScrollBarEnabled(true);
        setHorizontallyScrolling(false);
    }

    public PerfectScrollableTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        setVerticalScrollBarEnabled(true);
        setHorizontallyScrolling(false);
    }

    public PerfectScrollableTextView(Context context) {
        super(context);
        setVerticalScrollBarEnabled(true);
        setHorizontallyScrolling(false);
    }

    @Override
    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
        if(focused)
            super.onFocusChanged(focused, direction, previouslyFocusedRect);
    }

    @Override
    public void onWindowFocusChanged(boolean focused) {
        if(focused)
            super.onWindowFocusChanged(focused);
    }

    @Override
    public boolean isFocused() {
        return true;
    }
}

Finally change your 'TextView' in XML:

From: <TextView

To: <com.your_app_goes_here.PerfectScrollableTextView

Answer 29

In my case.Constraint Layout.AS 2.3.

Code implementation:

YOUR_TEXTVIEW.setMovementMethod(new ScrollingMovementMethod());

XML:

android:scrollbars="vertical"
android:scrollIndicators="right|end"

Answer 30

XML - You can use android:scrollHorizontally Attribute

Whether the text is allowed to be wider than the view (and therefore can be scrolled horizontally).

May be a boolean value, such as "true" or "false".

Prigramacaly - setHorizontallyScrolling(boolean)

Answer 31

尝试这个：

android:scrollbars = "vertical"

Answer 32

For a vertically or horizontally scrollable TextView some of the other answers help, but I needed to be able to scroll both ways.

What finally worked is a ScrollView with a HorizontalScrollView inside of it, and a TextView inside the HSV. It's very smooth and can easily go side to side or top to bottom in one swipe. It also only allows scrolling in one direction at a time so there's none of the jumping side to side while scrolling up or down.

An EditText with editing and cursor disabled works, but it feels terrible. Each attempt to scroll moves the cursor and it requires many swipes to go top to bottom or side to side in even a ~100-line file.

Using setHorizontallyScrolling(true) can work, but there's no similar method to allow vertical scrolling, and it doesn't work inside of a ScrollView as far as I can tell (just learning though, could be wrong).