其实就是在显示菜单栏时，有个动画的效果。代码比较简单，下面进行说明。
1.效果图如下，手机上查看效果更佳
2.代码实现,这里只讲解动画效果的实现，具体代码可在源代码中查看
<1> 先定义一个CanvasTransformer接口对象，这个接口是在slidingmenu_library类库中封装好的
private CanvasTransformer mTransformer;
<2> 然后再实例化此接口，重写接口中的方法，例如示例1中的方法：
/*** transformCanvas(Canvas canvas, float percentOpen) * ① Canvas canvas：画布类； * ② float percentOpen：滑动菜单栏打开时的百分比值。*/mTransformer = new CanvasTransformer() {@Overridepublic void transformCanvas(Canvas canvas, float percentOpen) {float scale = (float) (percentOpen * 0.25 + 0.75);canvas.scale(scale, scale, canvas.getWidth() / 2,canvas.getHeight() / 2);}};
<3> 最后在把实例化的接口对象赋给SlidingMenu类中的setBehindCanvasTransformer()方法：
getSlidingMenu().setBehindCanvasTransformer(mTransformer);
<4>这样就完成了动画效果的实现，下面是示例1的主界面代码，其他的有兴趣的朋友可以查看源代码
package com.yanis.anima;import android.graphics.Canvas;import android.os.Bundle;import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu;import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu.CanvasTransformer;import com.jeremyfeinstein.slidingmenu.lib.app.SlidingFragmentActivity;/*** * @author Yanis* @Description 滑动时缩放的效果*/public class FirstActivity extends SlidingFragmentActivity {private CanvasTransformer mTransformer;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);initAnimation();initSlidingMenu();getActionBar().setDisplayHomeAsUpEnabled(true);}/*** 初始化滑动菜单*/private void initSlidingMenu() {// 设置主界面视图 setContentView(R.layout.layout_right);// 设置滑动菜单视图 setBehindContentView(R.layout.layout_left);// 设置滑动菜单的属性值SlidingMenu sm = getSlidingMenu();// 根据dimension资源文件的ID来设置下方视图的偏移量,此处是220dp sm.setBehindOffsetRes(R.dimen.slidingmenu_offset);sm.setFadeDegree(0.35f);sm.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);sm.setBehindScrollScale(0.0f);sm.setBehindCanvasTransformer(mTransformer);setSlidingActionBarEnabled(true);}/*** 初始化动画效果*/private void initAnimation() {/*** transformCanvas(Canvas canvas, float percentOpen) * ① Canvas canvas：画布类； * ② float percentOpen：滑动菜单栏打开时的百分比值。*/mTransformer = new CanvasTransformer() {@Overridepublic void transformCanvas(Canvas canvas, float percentOpen) {float scale = (float) (percentOpen * 0.25 + 0.75);canvas.scale(scale, scale, canvas.getWidth() / 2,canvas.getHeight() / 2);}};}}
源代码地址：/YeXiaoChao/Yc_ui_slidingmenu_anima
本文地址：/yc-755909659/p/4311173.html
来源文章：/yangyu1224/article/details/9262931
