自定义仿iOS的ActionSheet底部Dialog的样式

1.设置dialog的style和dialog出现动画的style

 <!-- 自定义仿IOS的ActionSheet底部Dialog的样式 ，有模糊效果 -->
    <style name="ActionSheetDialogStyle" parent="@android:style/Theme.Dialog">
        <!-- 背景透明 -->
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowContentOverlay">@null</item>
        <!-- 浮于Activity之上 -->
        <item name="android:windowIsFloating">true</item>
        <!-- 边框 -->
        <item name="android:windowFrame">@null</item>
        <!-- Dialog以外的区域模糊效果 -->
        <item name="android:backgroundDimEnabled">true</item>
        <!-- 无标题 -->
        <item name="android:windowNoTitle">true</item>
        <!-- 半透明 -->
        <item name="android:windowIsTranslucent">true</item>
        <!-- Dialog进入及退出动画 -->
        <item name="android:windowAnimationStyle">@style/ActionSheetDialogAnimation</item>
    </style>
    <!-- ActionSheet进出动画 -->
    <style name="ActionSheetDialogAnimation" parent="@android:style/Animation.Dialog">
        <item name="android:windowEnterAnimation">@anim/actionsheet_dialog_in</item>
        <item name="android:windowExitAnimation">@anim/actionsheet_dialog_out</item>
    </style>

actionsheet_dialog_in.xml
<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="200"
    android:fromYDelta="100%"
    android:toYDelta="0" />

actionsheet_dialog_out.xml
<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="200"
    android:fromYDelta="0"
    android:toYDelta="100%" />

2.继承AlertDialog定义dialog的布局参数

 // 定义Dialog布局和参数
        View contentView = getContentView(LayoutInflater.from(mContext));
        initView(contentView);
        setContentView(contentView);
        Window dialogWindow = getWindow();
        dialogWindow.setGravity(Gravity.LEFT | Gravity.BOTTOM);
        WindowManager.LayoutParams lp = dialogWindow.getAttributes();
        lp.x = 0;
        lp.y = 0;
        lp.width = WindowManager.LayoutParams.MATCH_PARENT;
        lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
        dialogWindow.setAttributes(lp);

记得要返回ActionSheetDialogStyle
3.最后就是撘布局调用