add fragment animation

lib_base/src/main/java/com/android/base/adapter/pager/ViewPagerFragmentAdapter.java

@@ -10,20 +10,20 @@ import androidx.fragment.app.FragmentManager;
 import androidx.fragment.app.FragmentPagerAdapter;
 
 @SuppressWarnings("unused")
-public class ViewPageFragmentAdapter extends FragmentPagerAdapter {
+public class ViewPagerFragmentAdapter extends FragmentPagerAdapter {
 
-    private final List<ViewPageInfo> mTabs;
+    private final List<ViewPagerInfo> mTabs;
     private Context mContext;
 
-    public ViewPageFragmentAdapter(FragmentManager fragmentManager, Context context) {
+    public ViewPagerFragmentAdapter(FragmentManager fragmentManager, Context context) {
         super(fragmentManager);
         mContext = context;
         mTabs = new ArrayList<>();
     }
 
-    public void setDataSource(List<ViewPageInfo> viewPageInfoList) {
+    public void setDataSource(List<ViewPagerInfo> viewPagerInfoList) {
         mTabs.clear();
-        mTabs.addAll(viewPageInfoList);
+        mTabs.addAll(viewPagerInfoList);
     }
 
     @Override
@@ -33,8 +33,8 @@ public class ViewPageFragmentAdapter extends FragmentPagerAdapter {
 
     @Override
     public Fragment getItem(int position) {
-        ViewPageInfo viewPageInfo = mTabs.get(position);
-        return Fragment.instantiate(mContext, viewPageInfo.clazz.getName(), viewPageInfo.args);
+        ViewPagerInfo viewPagerInfo = mTabs.get(position);
+        return Fragment.instantiate(mContext, viewPagerInfo.clazz.getName(), viewPagerInfo.args);
     }
 
     @Override
@@ -42,7 +42,7 @@ public class ViewPageFragmentAdapter extends FragmentPagerAdapter {
         return mTabs.get(position).title;
     }
 
-    public List<ViewPageInfo> getTabs() {
+    public List<ViewPagerInfo> getTabs() {
         return mTabs;
     }
 }

lib_base/src/main/java/com/android/base/adapter/pager/ViewPagerInfo.java

@@ -5,13 +5,13 @@ import android.os.Bundle;
 import androidx.fragment.app.Fragment;
 
 @SuppressWarnings("all")
-public class ViewPageInfo {
+public class ViewPagerInfo {
 
     public final Class<? extends Fragment> clazz;
     public final Bundle args;
     public final String title;
 
-    public ViewPageInfo(String title, Class<? extends Fragment> clazz, Bundle args) {
+    public ViewPagerInfo(String title, Class<? extends Fragment> clazz, Bundle args) {
         this.title = title;
         this.clazz = clazz;
         this.args = args;

lib_base/src/main/java/com/android/base/adapter/pager/ViewPagerStateFragmentAdapter.java

@@ -11,20 +11,20 @@ import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
 import androidx.fragment.app.FragmentStatePagerAdapter;
 
-public class ViewPageStateFragmentAdapter extends FragmentStatePagerAdapter {
+public class ViewPagerStateFragmentAdapter extends FragmentStatePagerAdapter {
 
-    private final List<ViewPageInfo> mTabs;
+    private final List<ViewPagerInfo> mTabs;
     private Context mContext;
 
-    public ViewPageStateFragmentAdapter(FragmentManager fragmentManager, Context context) {
+    public ViewPagerStateFragmentAdapter(FragmentManager fragmentManager, Context context) {
         super(fragmentManager);
         mContext = context;
         mTabs = new ArrayList<>();
     }
 
-    public void setDataSource(List<ViewPageInfo> viewPageInfoList) {
+    public void setDataSource(List<ViewPagerInfo> viewPagerInfoList) {
         mTabs.clear();
-        mTabs.addAll(viewPageInfoList);
+        mTabs.addAll(viewPagerInfoList);
     }
 
     @Override
@@ -35,8 +35,8 @@ public class ViewPageStateFragmentAdapter extends FragmentStatePagerAdapter {
     @NotNull
     @Override
     public Fragment getItem(int position) {
-        ViewPageInfo viewPageInfo = mTabs.get(position);
-        return Fragment.instantiate(mContext, viewPageInfo.clazz.getName(), viewPageInfo.args);
+        ViewPagerInfo viewPagerInfo = mTabs.get(position);
+        return Fragment.instantiate(mContext, viewPagerInfo.clazz.getName(), viewPagerInfo.args);
     }
 
     @Override
@@ -44,7 +44,7 @@ public class ViewPageStateFragmentAdapter extends FragmentStatePagerAdapter {
         return mTabs.get(position).title;
     }
 
-    protected List<ViewPageInfo> getTabs() {
+    protected List<ViewPagerInfo> getTabs() {
         return mTabs;
     }
 

lib_base/src/main/java/com/android/base/app/Sword.java

@@ -6,6 +6,7 @@ import android.content.Context;
 import android.os.Bundle;
 
 import com.android.base.app.dagger.Injectable;
+import com.android.base.app.fragment.FragmentAnimator;
 import com.android.base.app.fragment.FragmentConfig;
 import com.android.base.app.fragment.LoadingViewFactory;
 import com.android.base.app.ui.PageNumber;
@@ -118,6 +119,11 @@ public final class Sword {
         return this;
     }
 
+    public Sword setDefaultFragmentAnimator(FragmentAnimator animator) {
+        FragmentConfig.setDefaultFragmentAnimator(animator);
+        return this;
+    }
+
     public Sword enableAutoInject() {
         Application.ActivityLifecycleCallbacks activityLifecycleCallbacks = new ActivityLifecycleCallbacksAdapter() {
 

lib_base/src/main/java/com/android/base/app/fragment/AnimatorHelper.java

@@ -0,0 +1,102 @@
+package com.android.base.app.fragment;
+
+import android.content.Context;
+import android.view.animation.Animation;
+import android.view.animation.AnimationUtils;
+
+import com.android.base.R;
+
+import androidx.fragment.app.FragmentTransaction;
+
+public final class AnimatorHelper {
+
+    private Animation noneAnim, noneAnimFixed;
+    private Animation enterAnim, exitAnim, popEnterAnim, popExitAnim;
+
+    private Context context;
+    private FragmentAnimator fragmentAnimator;
+
+    AnimatorHelper(Context context, FragmentAnimator fragmentAnimator) {
+        this.context = context;
+        notifyChanged(fragmentAnimator);
+    }
+
+    void notifyChanged(FragmentAnimator fragmentAnimator) {
+        this.fragmentAnimator = fragmentAnimator;
+        if (fragmentAnimator != null) {
+            initEnterAnim();
+            initExitAnim();
+            initPopEnterAnim();
+            initPopExitAnim();
+        }
+    }
+
+    public Animation getNoneAnim() {
+        if (noneAnim == null) {
+            noneAnim = AnimationUtils.loadAnimation(context, R.anim.no_anim);
+        }
+        return noneAnim;
+    }
+
+    public Animation getNoneAnimFixed() {
+        if (noneAnimFixed == null) {
+            noneAnimFixed = new Animation() {
+            };
+        }
+        return noneAnimFixed;
+    }
+
+    private Animation initEnterAnim() {
+        if (fragmentAnimator.getEnter() == 0) {
+            enterAnim = AnimationUtils.loadAnimation(context, R.anim.no_anim);
+        } else {
+            enterAnim = AnimationUtils.loadAnimation(context, fragmentAnimator.getEnter());
+        }
+        return enterAnim;
+    }
+
+    private Animation initExitAnim() {
+        if (fragmentAnimator.getExit() == 0) {
+            exitAnim = AnimationUtils.loadAnimation(context, R.anim.no_anim);
+        } else {
+            exitAnim = AnimationUtils.loadAnimation(context, fragmentAnimator.getExit());
+        }
+        return exitAnim;
+    }
+
+    private Animation initPopEnterAnim() {
+        if (fragmentAnimator.getPopEnter() == 0) {
+            popEnterAnim = AnimationUtils.loadAnimation(context, R.anim.no_anim);
+        } else {
+            popEnterAnim = AnimationUtils.loadAnimation(context, fragmentAnimator.getPopEnter());
+        }
+        return popEnterAnim;
+    }
+
+    private Animation initPopExitAnim() {
+        if (fragmentAnimator.getPopExit() == 0) {
+            popExitAnim = AnimationUtils.loadAnimation(context, R.anim.no_anim);
+        } else {
+            popExitAnim = AnimationUtils.loadAnimation(context, fragmentAnimator.getPopExit());
+        }
+        return popExitAnim;
+    }
+
+    Animation onCreateAnimation(BaseFragment baseFragment, int transit, boolean enter, int nextAnim) {
+        if (transit == FragmentTransaction.TRANSIT_FRAGMENT_OPEN) {
+            if (enter) {
+                return enterAnim;
+            } else {
+                return popExitAnim;
+            }
+        } else if (transit == FragmentTransaction.TRANSIT_FRAGMENT_CLOSE) {
+            if (enter) {
+                return popEnterAnim;
+            } else {
+                return exitAnim;
+            }
+        }
+        return null;
+    }
+
+}

lib_base/src/main/java/com/android/base/app/fragment/BaseFragment.java

@@ -7,6 +7,7 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewParent;
+import android.view.animation.Animation;
 
 import com.android.base.app.Sword;
 import com.android.base.app.activity.BackHandlerHelper;
@@ -45,6 +46,8 @@ public class BaseFragment extends Fragment implements LoadingView, OnBackPressLi
     /* just for cache*/
     private View mCachedView;
 
+    private AnimatorHelper mAnimatorHelper;
+
     private final FragmentDelegates mFragmentDelegates = new FragmentDelegates(this);
 
     private String tag() {
@@ -295,4 +298,13 @@ public class BaseFragment extends Fragment implements LoadingView, OnBackPressLi
         getLoadingViewImpl().showMessage(messageId);
     }
 
+    @Nullable
+    @Override
+    public Animation onCreateAnimation(int transit, boolean enter, int nextAnim) {
+        if (mAnimatorHelper == null) {
+            mAnimatorHelper = new AnimatorHelper(getContext(), FragmentConfig.defaultFragmentAnimator());
+        }
+        return mAnimatorHelper.onCreateAnimation(this, transit, enter, nextAnim);
+    }
+
 }

lib_base/src/main/java/com/android/base/app/fragment/DefaultHorizontalAnimator.java

@@ -0,0 +1,44 @@
+package com.android.base.app.fragment;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.base.R;
+
+
+public class DefaultHorizontalAnimator extends FragmentAnimator implements Parcelable {
+
+    public DefaultHorizontalAnimator() {
+        enter = R.anim.h_fragment_enter;
+        exit = R.anim.h_fragment_exit;
+        popEnter = R.anim.h_fragment_pop_enter;
+        popExit = R.anim.h_fragment_pop_exit;
+    }
+
+    protected DefaultHorizontalAnimator(Parcel in) {
+        super(in);
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    public static final Creator<DefaultHorizontalAnimator> CREATOR = new Creator<DefaultHorizontalAnimator>() {
+        @Override
+        public DefaultHorizontalAnimator createFromParcel(Parcel in) {
+            return new DefaultHorizontalAnimator(in);
+        }
+
+        @Override
+        public DefaultHorizontalAnimator[] newArray(int size) {
+            return new DefaultHorizontalAnimator[size];
+        }
+    };
+
+}

lib_base/src/main/java/com/android/base/app/fragment/DefaultNoAnimator.java

@@ -0,0 +1,42 @@
+package com.android.base.app.fragment;
+
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+public class DefaultNoAnimator extends FragmentAnimator implements Parcelable {
+
+    public DefaultNoAnimator() {
+        enter = 0;
+        exit = 0;
+        popEnter = 0;
+        popExit = 0;
+    }
+
+    protected DefaultNoAnimator(Parcel in) {
+        super(in);
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    public static final Creator<DefaultNoAnimator> CREATOR = new Creator<DefaultNoAnimator>() {
+        @Override
+        public DefaultNoAnimator createFromParcel(Parcel in) {
+            return new DefaultNoAnimator(in);
+        }
+
+        @Override
+        public DefaultNoAnimator[] newArray(int size) {
+            return new DefaultNoAnimator[size];
+        }
+    };
+
+}

lib_base/src/main/java/com/android/base/app/fragment/DefaultVerticalAnimator.java

@@ -0,0 +1,43 @@
+package com.android.base.app.fragment;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.base.R;
+
+public class DefaultVerticalAnimator extends FragmentAnimator implements Parcelable {
+
+    public DefaultVerticalAnimator() {
+        enter = R.anim.v_fragment_enter;
+        exit = R.anim.v_fragment_exit;
+        popEnter = R.anim.v_fragment_pop_enter;
+        popExit = R.anim.v_fragment_pop_exit;
+    }
+
+    protected DefaultVerticalAnimator(Parcel in) {
+        super(in);
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    public static final Creator<DefaultVerticalAnimator> CREATOR = new Creator<DefaultVerticalAnimator>() {
+        @Override
+        public DefaultVerticalAnimator createFromParcel(Parcel in) {
+            return new DefaultVerticalAnimator(in);
+        }
+
+        @Override
+        public DefaultVerticalAnimator[] newArray(int size) {
+            return new DefaultVerticalAnimator[size];
+        }
+    };
+
+}

lib_base/src/main/java/com/android/base/app/fragment/FragmentAnimator.java

@@ -0,0 +1,105 @@
+package com.android.base.app.fragment;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import androidx.annotation.AnimRes;
+
+public class FragmentAnimator implements Parcelable {
+
+    @AnimRes protected int enter;
+    @AnimRes protected int exit;
+    @AnimRes protected int popEnter;
+    @AnimRes protected int popExit;
+
+    public FragmentAnimator() {
+    }
+
+    public FragmentAnimator(int enter, int exit) {
+        this.enter = enter;
+        this.exit = exit;
+    }
+
+    public FragmentAnimator(int enter, int exit, int popEnter, int popExit) {
+        this.enter = enter;
+        this.exit = exit;
+        this.popEnter = popEnter;
+        this.popExit = popExit;
+    }
+
+    public FragmentAnimator copy() {
+        return new FragmentAnimator(getEnter(), getExit(), getPopEnter(), getPopExit());
+    }
+
+    protected FragmentAnimator(Parcel in) {
+        enter = in.readInt();
+        exit = in.readInt();
+        popEnter = in.readInt();
+        popExit = in.readInt();
+    }
+
+    public static final Creator<FragmentAnimator> CREATOR = new Creator<FragmentAnimator>() {
+        @Override
+        public FragmentAnimator createFromParcel(Parcel in) {
+            return new FragmentAnimator(in);
+        }
+
+        @Override
+        public FragmentAnimator[] newArray(int size) {
+            return new FragmentAnimator[size];
+        }
+    };
+
+    public int getEnter() {
+        return enter;
+    }
+
+    public FragmentAnimator setEnter(int enter) {
+        this.enter = enter;
+        return this;
+    }
+
+    public int getExit() {
+        return exit;
+    }
+
+    /**
+     * enter animation
+     */
+    public FragmentAnimator setExit(int exit) {
+        this.exit = exit;
+        return this;
+    }
+
+    public int getPopEnter() {
+        return popEnter;
+    }
+
+    public FragmentAnimator setPopEnter(int popEnter) {
+        this.popEnter = popEnter;
+        return this;
+    }
+
+    public int getPopExit() {
+        return popExit;
+    }
+
+    public FragmentAnimator setPopExit(int popExit) {
+        this.popExit = popExit;
+        return this;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(enter);
+        dest.writeInt(exit);
+        dest.writeInt(popEnter);
+        dest.writeInt(popExit);
+    }
+
+}

lib_base/src/main/java/com/android/base/app/fragment/FragmentConfig.java

@@ -9,6 +9,7 @@ public class FragmentConfig {
 
     private static final int INVALIDATE_ID = -1;
     private static int sDefaultContainerId = INVALIDATE_ID;
+    private static FragmentAnimator sFragmentAnimator = null;
 
     public static void setDefaultContainerId(int defaultContainerId) {
         sDefaultContainerId = defaultContainerId;
@@ -21,4 +22,12 @@ public class FragmentConfig {
         return sDefaultContainerId;
     }
 
+    public static void setDefaultFragmentAnimator(FragmentAnimator animator) {
+        sFragmentAnimator = animator;
+    }
+
+    static FragmentAnimator defaultFragmentAnimator() {
+        return sFragmentAnimator;
+    }
+
 }

lib_base/src/main/res/anim/h_fragment_enter.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <translate
+        android:duration="300"
+        android:fromXDelta="100%p"
+        android:interpolator="@android:anim/decelerate_interpolator"
+        android:toXDelta="0"/>
+
+</set>

lib_base/src/main/res/anim/h_fragment_exit.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <translate
+        android:duration="300"
+        android:fromXDelta="0"
+        android:interpolator="@android:anim/accelerate_interpolator"
+        android:toXDelta="100%p" />
+
+</set>

lib_base/src/main/res/anim/h_fragment_pop_enter.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="300">
+
+    <translate
+        android:fromXDelta="-26%p"
+        android:toXDelta="0" />
+
+</set>

lib_base/src/main/res/anim/h_fragment_pop_exit.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="300">
+
+    <translate
+        android:fromXDelta="0%p"
+        android:toXDelta="-26%p" />
+
+</set>

lib_base/src/main/res/anim/no_anim.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="0">
+
+</set>

lib_base/src/main/res/anim/pop_exit_no_anim.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="300">
+
+    <alpha
+        android:fromAlpha="1.0"
+        android:toAlpha="1.0" />
+
+</set>

lib_base/src/main/res/anim/v_fragment_enter.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+/*
+** Copyright 2009, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shareInterpolator="false"
+    android:zAdjustment="top">
+
+    <alpha
+        android:fromAlpha="0.0"
+        android:toAlpha="1.0"
+        android:interpolator="@android:anim/decelerate_interpolator"
+        android:fillEnabled="true"
+        android:fillBefore="false"
+        android:fillAfter="true"
+        android:duration="200" />
+
+    <translate
+        android:fromYDelta="8%"
+        android:toYDelta="0"
+        android:fillEnabled="true"
+        android:fillBefore="true"
+        android:fillAfter="true"
+        android:interpolator="@android:anim/decelerate_interpolator"
+        android:duration="300" />
+
+</set>

lib_base/src/main/res/anim/v_fragment_exit.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+/*
+** Copyright 2009, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shareInterpolator="false"
+    android:zAdjustment="top">
+
+    <alpha
+        android:fromAlpha="1.0"
+        android:toAlpha="0.0"
+        android:interpolator="@android:anim/linear_interpolator"
+        android:fillEnabled="true"
+        android:fillBefore="false"
+        android:fillAfter="true"
+        android:startOffset="100"
+        android:duration="150" />
+
+    <translate
+        android:fromYDelta="0%"
+        android:toYDelta="8%"
+        android:fillEnabled="true"
+        android:fillBefore="true"
+        android:fillAfter="true"
+        android:interpolator="@android:anim/accelerate_interpolator"
+        android:duration="250" />
+
+</set>

lib_base/src/main/res/anim/v_fragment_pop_enter.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+/*
+** Copyright 2009, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:zAdjustment="normal">
+
+    <alpha
+        android:fromAlpha="0.7"
+        android:toAlpha="1.0"
+        android:fillEnabled="true"
+        android:fillBefore="true"
+        android:fillAfter="true"
+        android:interpolator="@android:anim/accelerate_interpolator"
+        android:duration="250" />
+    
+</set>

lib_base/src/main/res/anim/v_fragment_pop_exit.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+/*
+** Copyright 2009, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:zAdjustment="normal">
+
+    <alpha
+        android:fromAlpha="1.0"
+        android:toAlpha="0.9"
+        android:fillEnabled="true"
+        android:fillBefore="false"
+        android:fillAfter="true"
+        android:interpolator="@android:anim/decelerate_interpolator"
+        android:duration="300" />
+
+</set>