Pop-up window popupwindow for Android

I have been studying Android and cainiao recently, so I want to record my growth in my blog. The boss gave me a live experience: the interface design, so I have been working in the water. Now I am going to record 1.1 drops and urge myself to work hard!

I found an example on the Internet, the code is incomplete, and I checked other articles by the blogger (blog garden --- notice501), and added my own manual changes to make the changes, so I can finally run it, the running effect is as follows,

The possible cause is that the gridview settings are incorrect and the offset is not successful. However, I want to display a transparent popupwindow when I click an icon in the bottom title bar, it's not far from implementation.

Mainactivity. Java

Package me. example. popup01;

Import Android. App. activity;
Import Android. content. context;
Import Android. OS. Bundle;
Import Android. View. gravity;
Import Android. View. keyevent;
Import Android. View. layoutinflater;
Import Android. View. view;
Import Android. View. viewgroup;
Import Android. View. View. onclicklistener;
Import Android. View. viewgroup. layoutparams;
Import Android. widget. baseadapter;
Import Android. widget. Button;
Import Android. widget. gridview;
Import Android. widget. imageview;
Import Android. widget. popupwindow;
Import Android. widget. textview;
Public class mainactivity extends activity {
Private gridview GV;
Private button Bt1;
Private button bt2;
Private button bt3;
Private button bt4;
Private button BT5;
Private int [] icons = {R. drawable. ic_launcher, R. drawable. ic_launcher,
R. drawable. ic_launcher, R. drawable. ic_launcher,
R. drawable. ic_launcher, R. drawable. ic_launcher,
R. drawable. ic_launcher, R. drawable. ic_launcher,
R. drawable. ic_launcher };
Private string [] items = {"Browser", "image", "camera", "Clock", "Music", "market", "dialing", "information ",
"Map "};
Private popupwindow MPOP;
Private view layout;
Private void initpopwindow (){
If (MPOP = NULL ){
MPOP = new popupwindow (layout, layoutparams. wrap_content,
Layoutparams. wrap_content );
}
If (MPOP. isshowing ()){
MPOP. Dismiss ();
}
}

/** Called when the activity is first created .*/
@ Override
Public void oncreate (bundle savedinstancestate ){
Super. oncreate (savedinstancestate );
Setcontentview (R. layout. activity_main );
Bt1 = (button) findviewbyid (R. Id. Bt1 );
Bt2 = (button) findviewbyid (R. Id. bt2 );
Bt3 = (button) findviewbyid (R. Id. bt3 );
Bt4 = (button) findviewbyid (R. Id. bt4 );
BT5 = (button) findviewbyid (R. Id. BT5 );
Layout = view. Inflate (this, R. layout. Window, null );
GV = (gridview) layout. findviewbyid (R. Id. gv );
Myadapter adapter = new myadapter (this, items, icons );
GV. setadapter (adapter );
Bt1.setonclicklistener (New onclicklistener (){
@ Override
Public void onclick (view v ){
Initpopwindow ();
MPOP. showasdropdown (V); // use this button as anchor (which can be understood as an anchor or benchmark ).
}
});

Bt2.setonclicklistener (New onclicklistener (){
@ Override
Public void onclick (view v ){
Initpopwindow ();
MPOP. showasdropdown (v, 20,-20); // horizontal axis offset 20, vertical axis-20, length of a status bar
}
});

Bt3.setonclicklistener (New onclicklistener (){
@ Override
Public void onclick (view v ){
Initpopwindow ();
MPOP. showatlocation (layout,
Gravity. Center, 0, 0); // the original text is MPOP. showatlocation (popwindow. This. findviewbyid (R. Id. RL ),
// Gravity. Top | gravity. Left, 20, 20 );
An error occurred in my Eclipse, maybe because I use 2.3.3.

// Change the first parameter to layout!

}
});

Bt4.setonclicklistener (New onclicklistener (){
@ Override
Public void onclick (view v ){
Initpopwindow ();
MPOP. showatlocation (layout,
Gravity. Bottom | gravity. Left, 0, 60); // at the top of the screen | right, with offset
}
});

// When the pop-up window appears, click "clearout" (BT5) to make the pop-up window disappear. The user-friendly design should be to click the blank area on the screen to disappear.
Bt5.setonclicklistener (New onclicklistener (){
@ Override
Public void onclick (view v ){
If (MPOP! = NULL ){
MPOP. Dismiss ();
}
}
});
}
Public Boolean onkeydown (INT keycode, keyevent event ){
// Intercepts button events
If (keycode = keyevent. keycode_menu ){
Initpopwindow ();
MPOP. showatlocation (layout, gravity. Bottom
| Gravity. center_horizontal, 0, 0); // at the bottom of the screen
} Else if (keycode = keyevent. keycode_back ){
If (MPOP. isshowing ()){
MPOP. Dismiss ();
} Else {
System. Exit (0 );
}
}
Return false;
}
}
// Custom Adapter
Class myadapter extends baseadapter {
Private context _ CT;
Private string [] _ items;
Private int [] _ icons;
Public myadapter (context CT, string [] items, int [] icons) // constructor. Three parameters must be input during creation.
{
_ Ct = CT;
_ Items = items;
_ Icons = icons;
}
@ Override
Public int getcount (){
Return _ items. length;
}

@ Override
Public object getitem (INT arg0 ){
Return _ items [arg0];
}
@ Override
Public long getitemid (INT position ){
Return position;
}
@ Override
Public View getview (INT position, view convertview, viewgroup parent ){
Layoutinflater factory = layoutinflater. From (_ CT );
View v = (View) Factory. Inflate (R. layout. gv, null); // bind a custom XML file. You can also create a gridview
Imageview IV = (imageview) v. findviewbyid (R. Id. Icon );
Textview TV = (textview) v. findviewbyid (R. Id. Text );
Iv. setimageresource (_ icons [position]);
TV. settext (_ items [position]);
Return V;
}
}

Activity_main.xml

<? XML version = "1.0" encoding = "UTF-8"?>
<Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android"
Android: Orientation = "horizontal"
Android: gravity = "center"
Android: Background = "@ drawable/pic0"
Android: layout_width = "fill_parent"
Android: layout_height = "fill_parent"
>
<Button
Android: Id = "@ + ID/Bt1"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: text = "btn1"
Android: textcolor = "#00 FFFF"/>
<Button
Android: Id = "@ + ID/bt2"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: text = "btn2"
Android: textcolor = "#00 FFFF"/>
<Button
Android: Id = "@ + ID/bt3"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: text = "btn3"
Android: textcolor = "#00 FFFF"/>
<Button
Android: Id = "@ + ID/bt4"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"

Android: text = "btn4"
Android: textcolor = "#00 FFFF"/>
<Button
Android: Id = "@ + ID/BT5"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: text = "clearout"
Android: textcolor = "#00 FFFF"/>

</Linearlayout>

Window. xml

<? XML version = "1.0" encoding = "UTF-8"?>
<Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android"

Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
>
<Gridview
Xmlns: Android = "http://schemas.android.com/apk/res/android"
Android: Id = "@ + ID/gv"
Android: Background = "#808080"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: numcolumns = "3"
Android: gravity = "center">
</Gridview>
</Linearlayout>

GV. xml

<? XML version = "1.0" encoding = "UTF-8"?>
<Linearlayout
Xmlns: Android = "http://schemas.android.com/apk/res/android"
Android: Orientation = "vertical"
Android: layout_width = "fill_parent"
Android: layout_height = "fill_parent"
>
<Imageview
Android: Id = "@ + ID/icon"
Android: layout_width = "wrap_content"
Android: layout_height = "40px"
Android: layout_gravity = "center"
/>
<Textview
Android: Id = "@ + ID/text"
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
Android: gravity = "center"
Android: textcolor = "# ffffffff"
/>
</Linearlayout>

I just changed a small part of the original article, and I know that I am really lacking, but I will definitely do better!