<com.freecats.demo.view.TextViewExpandableAnimation xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/tv_expand"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:tvea_expandBitmap="@drawable/icon_green_arrow_down"
        app:tvea_expandLines="3"
        app:tvea_shrinkBitmap="@drawable/icon_green_arrow_up"
        app:tvea_textContentColor="@color/color_gray_light_content_text"
        app:tvea_textContentSize="@dimen/sp_txt_size_content"
        app:tvea_textExpand="@string/expand"
        app:tvea_textShrink="@string/shrink"
        app:tvea_textStateColor="@color/colorPrimary" />

     TextViewExpandableAnimation tvExpand = (TextViewExpandableAnimation) findViewById(R.id.tv_expand);
     tvExpand.setText(text);