Android Marquee Text Guide

One way to achieve the marquee effect in Android is by using the TextView widget and combining it with property animations or a Handler to create the scrolling text effect. Here is a simple implementation method:

1. Add a TextView widget in the layout file and set its attribute to be scrollable.

<TextView
    android:id="@+id/marqueeTextView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:singleLine="true"
    android:ellipsize="marquee"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:marqueeRepeatLimit="marquee_forever"
    android:text="This is a marquee text view"
    android:textColor="@android:color/black"
    android:textSize="20sp" />

1. In Java code, locate the TextView widget and apply a scrolling effect to it.

TextView marqueeTextView = findViewById(R.id.marqueeTextView);
marqueeTextView.setSelected(true);

1. If you need to control scrolling speed or stop scrolling, you can achieve this by using property animations or a Handler.

// 使用属性动画控制滚动速度
ObjectAnimator animator = ObjectAnimator.ofFloat(marqueeTextView, "translationX", -100f, 1000f);
animator.setDuration(5000);
animator.setRepeatCount(ValueAnimator.INFINITE);
animator.setInterpolator(new LinearInterpolator());
animator.start();

// 使用Handler控制滚动停止
Handler handler = new Handler();
Runnable runnable = new Runnable() {
    @Override
    public void run() {
        marqueeTextView.clearAnimation();
    }
};
handler.postDelayed(runnable, 10000); // 10秒后停止滚动

By following the above steps, you can achieve a simple marquee effect for a TextView. You can also customize and optimize it further based on your specific needs.