Use PopupWindow to slide the selection menu from the bottom

In development, the pop-up effect of PopupWindow is indispensable. Many apps use PopupWindow. Such as Sina Weibo client, client, and public comment client. Today, we will introduce a menu slide from the bottom using PopupWindow in the client. In this example, the pop-up window inherits the pop-up form implemented by the PopupWindow class. The layout can be customized. The pop-up effect is mainly implemented using the translate and alpha styles. The example is as follows: Step 1: Design the pop-up window xml: [java] <? Xml version = "1.0" encoding = "UTF-8"?> <RelativeLayout xmlns: android = "http://schemas.android.com/apk/res/android" android: layout_width = "fill_parent" android: layout_height = "wrap_content" android: gravity = "center_horizontal" android: orientation = "vertical"> <LinearLayout android: id = "@ + id/pop_layout" android: layout_width = "fill_parent" android: layout_height = "wrap_content" android: gravity = "center_horizontal" android: orientation = "vertical" android: layout_alignParentBottom = "true" android: background = "@ drawable/strong"> <Button android: id = "@ + id/btn_take_photo" android: layout_marginLeft = "20dip" android: layout_marginRight = "20dip" android: layout_marginTop = "20dip" android: layout_width = "fill_parent" android: layout_height = "wrap_content" android: text = "" android: background = "@ drawable/btn_style_alert_dialog_button" android: textStyle = "bold"/> <Button android: id = "@ + id/btn_pick_photo" android: layout_marginLeft = "20dip" android: layout_marginRight = "20dip" android: layout_marginTop = "5dip" android: layout_width = "fill_parent" android: layout_height = "wrap_content" android: text = "select" android: background = "@ drawable/btn_style_alert_dialog_button" android: textStyle = "bold"/> <Button android: id = "@ + id/btn_cancel" android: layout_marginLeft = "20dip" android: layout_marginRight = "20dip" android: layout_marginTop = "15dip" android: layout_marginBottom = "15dip" android: layout_width = "fill_parent" android: layout_height = "wrap_content" android: text = "cancel" android: background = "@ drawable/btn_style_alert_dialog_cancel" android: textColor = "# ffffff" android: textStyle = "bold"/> </LinearLayout> </RelativeLayout> Step 2: Create the SelectPicPopupWindow class to inherit from the PopupWindow: [java] import android. app. activity; import android. content. context; import android. graphics. drawable. colorDrawable; import android. view. layoutInflater; import android. view. motionEvent; import android. view. view; import android. view. view. onClickListener; import android. view. view. onTouchListener; import android. view. viewGroup. layoutParams; import android. widget. button; import android. widget. popupWindow; public class SelectPicPopupWindow extends PopupWindow {private Button values, values, btn_cancel; private View mMenuView; public SelectPicPopupWindow (Activity context, OnClickListener itemsOnClick) {super (context ); layoutInflater inflater = (LayoutInflater) context. getSystemService (Context. LAYOUT_INFLATER_SERVICE); mMenuView = inflater. inflate (R. layout. alert_dialog, null); btn_take_photo = (Button) mMenuView. findViewById (R. id. btn_take_photo); btn_pick_photo = (Button) mMenuView. findViewById (R. id. btn_pick_photo); btn_cancel = (Button) mMenuView. findViewById (R. id. btn_cancel); // cancel the button btn_cancel.setOnClickListener (new OnClickListener () {public void onClick (View v) {// destroy the pop-up box dismiss ();}}); // set the button to listen to btn_pick_photo.setOnClickListener (itemsOnClick); btn_take_photo.setOnClickListener (itemsOnClick); // set the View of SelectPicPopupWindow this. setContentView (mMenuView); // you can specify the width of the SelectPicPopupWindow window. setWidth (LayoutParams. FILL_PARENT); // set the height of the SelectPicPopupWindow pop-up form this. setHeight (LayoutParams. WRAP_CONTENT); // you can click this to set the SelectPicPopupWindow pop-up window. setFocusable (true); // set SelectPicPopupWindow to bring up the form animation effect this. setAnimationStyle (R. style. animBottom); // instantiate a ColorDrawable color as translucent ColorDrawable dw = new ColorDrawable (0xb0000000); // set the background of the SelectPicPopupWindow pop-up form this. setBackgroundDrawable (dw); // added the OnTouchListener listener to the mMenuView to determine whether to obtain the touch screen position. If it is outside the selection box, the mMenuView pop-up box is destroyed. setOnTouchListener (new OnTouchListener () {public boolean onTouch (View v, MotionEvent event) {int height = mMenuView. findViewById (R. id. pop_layout ). getTop (); int y = (int) event. getY (); if (event. getAction () = MotionEvent. ACTION_UP) {if (y