How to animate the textview (very very long text )scroll automatically horizontally

Question

I am not interested in Marquee because, in Marquee you can not control the speed of marquee. I have tried to animate the textview but Parent view clips the text at the end e

Answer 1

I am sure this will definitely solve the problem of the large audience out there.

Q: Auto-scroll a single line long text message(either using hard_coding or from string.xml) horizontally & infinitely at a reasonable speed but using marquee(try it once at least). No clipping

Step 1: In activity_main.xml file:

<TextView
    android:text="either hard coding or from string.xml"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/textView2"  
    android:background="@color/colorPrimary"
    android:textSize="18sp"
    android:marqueeRepeatLimit="marquee_forever"
    android:textColor="@android:color/background_light" />

Step 2: In main_activity java file public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    TextView textView = (TextView) findViewById(R.id.textView2);
    textView.setEllipsize(TextUtils.TruncateAt.MARQUEE);
    textView.setSelected(true);
    textView.setSingleLine(true);
    textView.setText("Oxfam says 8 men as rich as half the world. | Govt may set threshold for probe into deposits. | At least 32 dead after Turkish plane hits village.");}}

//one can remove the last line line if he has already feed the long input

Answer 2

Can try out this. This is a solution using TranslateAnimation for creating an auto scrolling text (horizontal scroll, from Right to Left) (Tested on Android 8)

Class: AnimationAutoTextScroller.java

/**
 * A Class for automatically scrolling text horizontally from Right to Left 
 * using TranslateAnimation so that the scrolling speed can be controlled -Suresh Kodoor
 */

public class AnimationAutoTextScroller {

    Animation animator;
    TextView  scrollingTextView;
    int       duration = 50000;  // default value

    public AnimationAutoTextScroller(TextView tv, float screenwidth) {

        this.scrollingTextView = tv;
        this.animator = new TranslateAnimation(
                Animation.ABSOLUTE, screenwidth,
                Animation.RELATIVE_TO_SELF, -1f,
                Animation.RELATIVE_TO_SELF, 0f,
                Animation.RELATIVE_TO_SELF, 0f
        );
        this.animator.setInterpolator(new LinearInterpolator());
        this.animator.setDuration(this.duration);
        this.animator.setFillAfter(true);
        this.animator.setRepeatMode(Animation.RESTART);
        this.animator.setRepeatCount(Animation.INFINITE);

        // setAnimationListener();
    }

    public void setDuration(int duration) {
        this.duration = duration;
    }

    public void setScrollingText(String text) {
        this.scrollingTextView.setText(text);
    }

    public void start() {
        this.scrollingTextView.setSelected(true);
        this.scrollingTextView.startAnimation(this.animator);
    }

    public void setAnimationListener() {

        animator.setAnimationListener(new Animation.AnimationListener() {
            public void onAnimationStart(Animation animation) {
            }
            public void onAnimationEnd(Animation animation) {
                // This callback function can be used to perform any task at the end of the Animation
            }
            public void onAnimationRepeat(Animation animation) {
            }
        });
    }
}

Layout XML: (keep the TextView under a HorizontalScrollView)

 <HorizontalScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scrollbars="none"
        app:layout_constraintBottom_toTopOf="@+id/hguide3"
        app:layout_constraintEnd_toStartOf="@+id/vguide2"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toEndOf="@+id/vguide1"
        app:layout_constraintTop_toBottomOf="@+id/hguide2">

    <TextView
        android:id="@+id/translateanimatortextviewscroller"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="0dp"
        android:layout_marginEnd="0dp"
        android:layout_marginLeft="0dp"
        android:layout_marginStart="0dp"
        android:layout_marginTop="0dp"
        android:text=""
        android:singleLine="true"
        android:focusable="true"
        android:scrollHorizontally="true"
        android:background="#000000ff"
        android:textColor="#ff0000"
        android:textSize="55dp"
        android:textStyle="bold"
        android:typeface="sans" />

      </HorizontalScrollView>

Activity:

TextView scrollertextview = findViewById(R.id.translateanimatortextviewscroller);
textscroller = new AnimationAutoTextScroller(scrollertextview, screenwidth);
textscroller.setScrollingText(scrollertext);
textscroller.setDuration(60000);
textscroller.start();

Answer 3

<translate>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="5000"
android:fromXDelta="1500"
android:interpolator="@android:anim/linear_interpolator"
android:repeatCount="infinite"
android:repeatMode="restart"
android:toXDelta="-1250" />

Answer 4

Its really frustrating,... But the answer is simple, Use Edittext instead of TextView, and wrap it in horizontalscrollview At the same time, setfocusable: false

   <HorizontalScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:scrollbars="none">

        <EditText
            android:id="@+id/post_message"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="15dp"
            android:focusable="false"
            android:outlineAmbientShadowColor="@color/colorPrimaryDark"
            android:shadowColor="#000000"
            android:shadowDx="1.5"
            android:shadowDy="1.3"
            android:shadowRadius="1.6"
            android:singleLine="true"
            android:textAlignment="center"
            android:textColor="@color/colorPrimary"
            android:textSize="20dp" />
    </HorizontalScrollView>

Thanks to Hein, add the animation code

final EditText textView =  view.findViewById(R.id.post_message);
        textView.startAnimation((Animation) AnimationUtils.loadAnimation(context,R.anim.horizontal_animation));
        String message="LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLong Text.";
        textView.setText(message);

Answer 5

This is what worked for me. Place your textview inside a scroll view and then perform TranslateAnimation on the scrollview's child, my case its the LinearLayout. I am actually adding multiple views dynamically inside this linear layout.

<ScrollView android:id="@+id/textScrollView"
    android:layout_width="wrap_content"
    android:layout_height="match_parent">
    <LinearLayout
        android:id="@+id/textLayout"
        android:orientation="vertical"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
    </LinearLayout>
</ScrollView>

TranslateAnimation slide = new TranslateAnimation(0, 0, height, -textLayout.getHeight());
    slide.setDuration(movementSpeed);
    slide.setRepeatCount(-1);
    slide.setRepeatMode(Animation.RESTART);
    slide.setInterpolator(new LinearInterpolator());

textLayout.startAnimation(slide);

height --> The point start scrolling up (in my case device height (device bottom))
movementSpeed --> scrolling speed