获取要滚动的TextView

<TextView
    android:id="@+id/scrollingTextView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="This is a scrolling text view"
    android:singleLine="true"
    android:ellipsize="marquee"
    android:marqueeRepeatLimit="marquee_forever"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:scrollHorizontally="true"
    android:freezesText="true"
    android:textColor="#000000"
    android:textSize="16sp" />

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

scrollingTextView.setSelected(true);

scrollingTextView.requestFocus();