跑马灯

              <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:ellipsize="marquee"
                    android:focusable="true"
                    android:focusableInTouchMode="true"
                    android:freezesText="true"
                    android:gravity="center_vertical"
                    android:includeFontPadding="false"
                    android:marqueeRepeatLimit="marquee_forever"
                    android:scrollHorizontally="true"
                    android:singleLine="true"
                    android:textColor="@color/white"
                    android:textSize="12sp"/>

//TextView调用setSelected(true)