PopupWindow设置动画效果

创建popupwindow的方法

Button menu;
private void showPopupWindow() {  
        //设置contentView
	float density = DensityUtil.Obtain(activity).density;
        View contentView = LayoutInflater.from(ActivityHomeImpl.this).inflate(R.layout.activity_home_menu, null);
        contentView.setBackgroundColor(0xff003333);
        mPopWindow = new PopupWindow(contentView, -2, DensityUtil.round(50* density), true);//DensityUtil.round(50* density)
        mPopWindow.setContentView(contentView);
        //设置各个控件的点击响应  
        ((Button)contentView.findViewById(R.id.btn1)).setOnClickListener(this);
        ((Button)contentView.findViewById(R.id.btn2)).setOnClickListener(this);
        ((Button)contentView.findViewById(R.id.btn3)).setOnClickListener(this);
        ((Button)contentView.findViewById(R.id.btn4)).setOnClickListener(this);
        ((Button)contentView.findViewById(R.id.btn5)).setOnClickListener(this);
        ((Button)contentView.findViewById(R.id.btn6)).setOnClickListener(this);
        mPopWindow.setTouchable(true);
        mPopWindow.setOutsideTouchable(true);
        // 实例化一个ColorDrawable颜色为半透明
 	//ColorDrawable dw = new ColorDrawable(0xd0000000);
 	//mPopWindow.setBackgroundDrawable(dw);
 	// 设置背景颜色变暗  
        WindowManager.LayoutParams lp = getWindow().getAttributes();
        lp.alpha = 0.7f;
        getWindow().setAttributes(lp);
        mPopWindow.setOnDismissListener(new OnDismissListener() {

            @Override
            public void onDismiss() {
                WindowManager.LayoutParams lp = getWindow().getAttributes();
                lp.alpha = 1f;
                getWindow().setAttributes(lp);
                mPopWindow.dismiss();
            }
        });
 	// 设置popWindow的显示和消失动画
        mPopWindow.setAnimationStyle(R.style.contextMenuAnim);
        mPopWindow.showAsDropDown(menu);
}

popupwindow 动画

<style name="contextMenuAnim" parent="@android:style/Animation.Activity">
        <item name="android:windowEnterAnimation">@anim/context_menu_enter</item>
        <!-- 指定显示时的动画xml -->
        <item name="android:windowExitAnimation">@anim/context_menu_exit</item>
        <!-- 指定消失时的动画xml -->
</style>

activity的Theme设置

<style name="RedAppLaucherTheme" parent="AppTheme">
        
</style>

context_menu_enter.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >

    <translate
        android:duration="200"
        android:fromXDelta="-100%"
        android:fromYDelta="0"
        android:interpolator="@android:anim/anticipate_overshoot_interpolator"
        android:toXDelta="0"
        android:toYDelta="0" />

</set>

context_menu_exit.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >

    <translate
        android:duration="200"
        android:fromXDelta="0"
        android:fromYDelta="0"
        android:interpolator="@android:anim/overshoot_interpolator"
        android:toXDelta="-100%"
        android:toYDelta="0" />

</set>

布局文件activity_home_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="50dp"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/btn1"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="5dp"
            android:background="@drawable/item_connection" />

        <Button
            android:id="@+id/btn2"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="5dp"
            android:background="@drawable/item_disk" />

        <Button
            android:id="@+id/btn3"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="5dp"
            android:background="@drawable/item_upgrade" />

        <Button
            android:id="@+id/btn4"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="5dp"
            android:background="@drawable/item_status" />

        <Button
            android:id="@+id/btn5"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="5dp"
            android:background="@drawable/item_about" />

        <Button
            android:id="@+id/btn6"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="5dp"
            android:background="@drawable/item_setting" />
    </LinearLayout>

</RelativeLayout>