[移动开发]Android 文字自动滚动（跑马灯）效果

布局代码：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<TextView
    android:id="@+id/main_tv_test"
    android:layout_width="200dp"
    android:layout_height="100dp"
    android:text="abcdefghigklmnopqrstuvwxyz@abcdefghigklmnopqrstuvwxyz"
    android:singleLine="true"
    android:ellipsize="marquee"
    android:marqueeRepeatLimit="marquee_forever"
    />
	</LinearLayout>

java代码：

public class MainActivity extends AppCompatActivity {
private  TextView mTv;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initView();
}

private void initView() {
    mTv = findViewById(R.id.main_tv_test);
    mTv.setSelected(true);
}
}