Android仿微信activity滑動關閉效果

BaseActivity:
public class BaseSlideCloseActivity extends AppCompatActivity implements
  SlidingPaneLayout.PanelSlideListener {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  initSlideBackClose();
  super.onCreate(savedInstanceState);
 }

 private void initSlideBackClose() {
  if (isSupportSwipeBack()) {
   SlidingPaneLayout slidingPaneLayout = new SlidingPaneLayout(this);
   // 通過反射改變mOverhangSize的值為0，
   // 這個mOverhangSize值為菜單到右邊屏幕的最短距離，
   // 默認是32dp，現在給它改成0
   try {
    Field overhangSize = SlidingPaneLayout.class.getDeclaredField("mOverhangSize");
    overhangSize.setAccessible(true);
    overhangSize.set(slidingPaneLayout, 0);
   } catch (Exception e) {
    e.printStackTrace();
   }
   slidingPaneLayout.setPanelSlideListener(this);
   slidingPaneLayout.setSliderFadeColor(getResources()
     .getColor(android.R.color.transparent));

   // 左側的透明視圖
   View leftView = new View(this);
   leftView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
   slidingPaneLayout.addView(leftView, 0);

   ViewGroup decorView = (ViewGroup) getWindow().getDecorView();


   // 右側的內容視圖
   ViewGroup decorChild = (ViewGroup) decorView.getChildAt(0);
   decorChild.setBackgroundColor(getResources()
     .getColor(android.R.color.white));
   decorView.removeView(decorChild);
   decorView.addView(slidingPaneLayout);

   // 為 SlidingPaneLayout 添加內容視圖
   slidingPaneLayout.addView(decorChild, 1);
  }
 }

 protected boolean isSupportSwipeBack() {
  return true;
 }

 @Override
 public void onPanelSlide(View panel, float slideOffset) {

 }

 @Override
 public void onPanelOpened(View panel) {
  finish();
 }

 @Override
 public void onPanelClosed(View panel) {

 }
}

<resources xmlns:tools="http://schemas.android.com/tools">

 <!-- Base application theme. -->
 <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
  <!-- Customize your theme here. -->
  <item name="colorPrimary">@color/colorPrimary</item>
  <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
  <item name="colorAccent">@color/colorAccent</item>
 </style>

 <style name="DIY.SlideClose.Transparent.Theme" parent="AppTheme">
  <item name="android:windowBackground">@android:color/transparent</item>
  <item name="android:windowIsTranslucent">true</item>
  <item name="android:windowAnimationStyle">@style/DIY.Animation.SlidingBack</item>
  <item name="android:actionBarStyle">@style/DIYActionBar.Custom</item>
 </style>

 <style name="DIYActionBar.Custom" parent="@style/Widget.AppCompat.Light.ActionBar.Solid.Inverse">
  <item name="displayOptions">showCustom</item>
  <item name="android:background">@android:color/transparent</item>
  <item name="background">@android:color/transparent</item>
  <item name="android:displayOptions" tools:ignore="NewApi">showCustom</item>
  <item name="android:height">?actionBarSize</item>
 </style>

 <style name="DIY.Animation.SlidingBack" parent="@android:style/Animation.Activity">
  <item name="android:activityOpenEnterAnimation">@anim/slide_in_right</item>
  <item name="android:activityOpenExitAnimation">@anim/slide_out_right</item>
  <item name="android:activityCloseEnterAnimation">@anim/slide_in_right</item>
  <item name="android:activityCloseExitAnimation">@anim/slide_out_right</item>
  <item name="android:wallpaperOpenEnterAnimation">@anim/slide_in_right</item>
  <item name="android:wallpaperOpenExitAnimation">@anim/slide_out_right</item>
  <item name="android:wallpaperCloseEnterAnimation">@anim/slide_in_right</item>
  <item name="android:wallpaperCloseExitAnimation">@anim/slide_out_right</item>
  <item name="android:wallpaperIntraOpenEnterAnimation">@anim/slide_in_right</item>
  <item name="android:wallpaperIntraOpenExitAnimation">@anim/slide_out_right</item>
  <item name="android:wallpaperIntraCloseEnterAnimation">@anim/slide_in_right</item>
  <item name="android:wallpaperIntraCloseExitAnimation">@anim/slide_out_right</item>
 </style>
 
</resources>