Differences between visibility, invisible, and gone in Android

In Android development, most controls have the visibility attribute, which has three attributes: "visible", "invisible", and "gone ". It is mainly used to set the display and hide of control controls. Some may wonder what is the difference between invisible and gone ??? So let's take a look at this question: In the XML file and Java code, it is set as follows: Visible) XML file: Android: visibility = "visible" Java code: view. setvisibility (view. Visible ); Invisible) XML file: Android: visibility = "invisible" Java code: view. setvisibility (view. Invisible ); Hide (gone) XML file: Android: visibility = "gone" Java code: view. setvisibility (view. Gone ); In order to distinguish the three, I created a dome demo. First I went to the dome code and the demo to know the differences between them: XML file: <? XML version = "1.0" encoding = "UTF-8"?> <Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android" Android: layout_width = "fill_parent" Android: layout_height = "fill_parent" Android: Orientation = "vertical"> <linearlayout Android: layout_width = "fill_parent" Android: layout_height = "wrap_content" Android: Orientation = "horizontal" Android: layout_marginbottom = "20dip"> <textview Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: layout_weight = "1" Android: Background = "# f00" Android: text = "textview1" Android: textsize = "23sp" Android: visibility = "visible"/> <textview Android: Id = "@ + ID/maintv2" Android: layout_width = "wrap_content" Android: layout_height = "wrap_content" Android: layout_weight = "1" Android: Background = "# 00f" Android: text = "textview2" Android: textsize = "23sp" Android: visibility = "visible"/> </linearlayout> <button Android: Id = "@ + ID/mainbtn1" Android: layout_width = "fill_parent" Android: layout_height = "wrap_content" Android: TEXT = "textview2 is visible" Android: onclick = "mianonclicklistener"/> <button Android: Id = "@ + ID/mainbtn2" Android: layout_width = "fill_parent" Android: layout_height = "wrap_content" Android: text = "textview2 is invisible" Android: onclick = "mianonclicklistener"/> <button Android: Id = "@ + ID/mainbtn3" Android: layout_width = "fill_parent" Android: layout_height = "wrap_content" Android: text = "textview2 is gone" Android: onclick = "mianonclicklistener"/> </linearlayout> The following three buttons only control the visibility attribute of textview: Package COM. example. androidtestdemo; import android. app. activity; import android. OS. bundle; import android. view. view; import android. widget. textview; public class mainactivity extends activity {/** textview2 */private textview maintv2 = NULL; @ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. main); // initialize the data initdata ();}/** method of initializing the control */private void initdata () {maintv2 = (textview) findviewbyid (R. id. maintv2);} public void mianonclicklistener (view v) {Switch (v. GETID () {case R. id. mainbtn1: {// RESPONSE event of Button 1 // set textview2 to see maintv2.setvisibility (view. visible); break;} case R. id. mainbtn2: {// RESPONSE event of Button 2 // set textview2 invisible maintv2.setvisibility (view. invisible); break;} case R. id. mainbtn3: {// RESPONSE event of button 3 // set textview2 to hide maintv2.setvisibility (view. gone); break;} default: break ;}}} Because both textviews are visible when the program starts. When we click the 1st button and set the textview2visibility attribute to invisible, the program is as follows: When we click the 3rd button and set the textview2visibility attribute to gone, the program is as follows: When we click the 1st button and set the textview2visibility attribute to visible, textview2 is displayed again, as shown in: We can see from the above demonstration Visible: Set control visibility Invisible: sets the control to be invisible. Gone: Set the control to hide The main difference between invisible and gone is that when the visibility attribute of the control is invisible, the interface retains the space occupied by the view control; when the control attribute is gone, the page does not reserve the space occupied by the view control.