此篇博客实现的功能是:点击界面中的图片,跳出一个PopupWindow,PopupWindow中含有相应的文字和图标,并且在显示PopupWindow的时候,背景为半透明。
看图描述:点击加号,跳出PopupWindow,其中包含三个图片,点击叉号PopupWindow消失;当PopupWindow显示的时候,背景为半透明
显示PopupWindow的代码
private void showPopupWindow() {
View view = (LinearLayout) getLayoutInflater().inflate(R.layout.popup_window_layout, null);
ImageView ivP = (ImageView) view.findViewById(R.id.ivP);
ImageView ivX = (ImageView) view.findViewById(R.id.ivX);
ImageView ivClose = (ImageView) view.findViewById(R.id.ivClose);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
ivP.setLayoutParams(params);
ivX.setLayoutParams(params);
ivClose.setLayoutParams(params);
ivClose.setOnClickListener(this);
popupWindow = new PopupWindow(WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.WRAP_CONTENT);
popupWindow.setContentView(view);
popupWindow.setFocusable(true);
popupWindow.setTouchable(true);
popupWindow.setOutsideTouchable(false);
popupWindow.showAsDropDown(ivAdd, 0, 0);
backgroundAlpha(0.4f);
}
private void backgroundAlpha(float f) {
WindowManager.LayoutParams lp =getWindow().getAttributes();
lp.alpha = f;
getWindow().setAttributes(lp);
}
backgroundAlpha()方法用于设置PopupWindow显示后的背景半透明,参数 f 的范围是0.0~1.0,数值越大透明度越高。
源码下载
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