<style name="MyDialogTheme" parent="@android:style/Theme.Material.Light.Dialog">
<item name="android:windowBackground">@color/my_transparent_color</item>
<item name="android:backgroundDimEnabled">true</item>
<item name="android:backgroundDimAmount">0.6</item>
</style>
创建PopupWindow时，在构造函数中指定该主题：
PopupWindow popup = new PopupWindow(context);
popup.setContentView(view);
popup.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
popup.setOutsideTouchable(true);
popup.setFocusable(true);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
popup.setOverlayInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
popup.setForceShowIcon(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M ? true : false);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1) {
popup.setElevation(10f);
// set the theme
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
popup.setEnterTransition(new Fade(Fade.IN));
popup.setExitTransition(new Fade(Fade.OUT));
} else {
popup.setAnimationStyle(R.style.PopupAnimation);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
int[] location = new int[2];
view.getLocationInWindow(location);
Point point = new Point();
context.getDisplay().getRealSize(point);
if ((point.y - location[1]) <= 800){
// show at the top of the anchor view
popup.showAtLocation(view, Gravity.TOP | Gravity.CENTER_HORIZONTAL, 0, 0);
}else {
// show at the bottom of the anchor view
popup.showAsDropDown(view);
} else {
popup.showAsDropDown(view);
注意：要启用模糊效果，需要将android:backgroundDimEnabled设置为true，并将android:backgroundDimAmount设置为介于0和1之间的值。
希望这可以帮助到您。
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