仿iOS底部弹出popUpWindow

上面为弹出来的效果

popUpWindow布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="5dp"
    android:orientation="vertical">

    <LinearLayout
        android:padding="2dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center_horizontal"
        android:background="@drawable/popwindow_bg"//使用shape画出圆角矩形，边框为为灰色，背景为白色。颜色不要再线性布局中设置，也会掩盖圆角矩形。
        android:orientation="vertical">

        <TextView
            android:id="@+id/takePhoto"
            style="@style/bottom_pop_textview"//宽不能设为match_parent,否则外层的圆角矩形会被遮盖。
            android:text="拍照"

            />
        <TextView
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="@android:color/darker_gray"
            />
        <TextView
            android:id="@+id/openPhotos"
            style="@style/bottom_pop_textview"
            android:layout_marginTop="1dp"
            android:text="打开相册"
            />

    </LinearLayout>
    <LinearLayout
        android:padding="2dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center_horizontal"
        android:layout_marginTop="10dp"
        android:background="@drawable/popwindow_bg"//使用shape画出圆角矩形，边框为为灰色，背景为白色。
        android:orientation="vertical">
        <TextView
            android:id="@+id/cancel"
            style="@style/bottom_pop_textview"
            android:text="取消"
            />
    </LinearLayout>

</LinearLayout>

shape画出圆角矩形 代码：

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle"
    >
    <stroke android:width="1dip" android:color="#ffbbbbbb"/>
    <corners android:topLeftRadius="15dip"
        android:topRightRadius="15dip"
        android:bottomLeftRadius="15dip"
        android:bottomRightRadius="15dip" />
    <solid android:color="@android:color/white"/>
</shape>

从底部弹出popupwindow：

/**
     * 从底部弹出popupwindow
     */
    private void showBottomPop(View parent) {
        final View popView = View.inflate(getActivity(), R.layout.bottom_pop_layout, null);
        showAnimation(popView);//开启动画
        PopupWindow mPopWindow = new PopupWindow(popView, LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        clickPopItem(popView, mPopWindow);//条目的点击
        mPopWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        mPopWindow.showAtLocation(parent,
                Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, 0);
        mPopWindow.setOutsideTouchable(true);
        mPopWindow.setFocusable(true);
        mPopWindow.update();
        // 设置背景颜色变暗
        WindowManager.LayoutParams lp = activity.getWindow().getAttributes();
        lp.alpha = 0.7f;
        getActivity().getWindow().setAttributes(lp);
        mPopWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {

            @Override
            public void onDismiss() {
                WindowManager.LayoutParams lp = activity.getWindow().getAttributes();
                lp.alpha = 1f;
                getActivity().getWindow().setAttributes(lp);
            }
        });
    }

弹出的动画：

/**
     * 给popupwindow添加动画
     *
     * @param popView
     */
    private void showAnimation(View popView) {
        AnimationSet animationSet = new AnimationSet(false);
        AlphaAnimation alphaAnimation = new AlphaAnimation(0f, 1.0f);
        alphaAnimation.setDuration(300);
        TranslateAnimation translateAnimation = new TranslateAnimation(
                Animation.RELATIVE_TO_SELF, 0f, Animation.RELATIVE_TO_SELF, 0f,
                Animation.RELATIVE_TO_SELF, 1f, Animation.RELATIVE_TO_SELF, 0f
        );
        translateAnimation.setDuration(300);
        animationSet.addAnimation(alphaAnimation);
        animationSet.addAnimation(translateAnimation);
        popView.startAnimation(animationSet);
    }