How do I get a button to open another activity

Question

I ve added a button to my activity XML file and I can t get it to open my other activity  Can some please tell me step by step on how to do this

User · Answer

Apply the following steps    insert new layout xml in folder layout rename window2 add new button and add this line   android onClick  window2    mainactivity java  public void openWindow2 View v              call window2         setContentView R layout window2

User · Answer

Write code on xml file    lt Button android width  wrap content          android height  wrap content          android id    id button          android text  Click   gt    Write Code in your java file  Button button  Button findViewById R id button   button setOnClickListener new View OnClickListener                  Override         public void onClick View v                        startActivity new Intent getApplicationContext   Secondclass class                  if you want to finish the first activity then just call             finish

User · Answer

Using an OnClickListener  Inside your Activity instance s onCreate   method you need to first find your Button by it s id using findViewById   and then set an OnClickListener for your button and implement the onClick   method so that it starts your new Activity    Button yourButton    Button  findViewById R id your buttons id    yourButton setOnClickListener new OnClickListener        public void onClick View v                                   startActivity new Intent YourCurrentActivity this  YourNewActivity class                This is probably most developers preferred method  However  there is a common alternative   Using onClick in XML  Alternatively you can use the android onClick  yourMethodName  to declare the method name in your Activity which is called when you click your Button  and then declare your method like so   public void yourMethodName View v       startActivity new Intent YourCurrentActivity this  YourNewActivity class        Also  don t forget to declare your new Activity in your manifest xml  I hope this helps   References    Starting Another Activity  Official API Guide

User · Answer

A   Make sure your other activity is declared in manifest     lt activity     android name  MyOtherActivity      android label   string app name  gt   lt  activity gt    All activities must be declared in manifest  even if they do not have an intent filter assigned to them     B   In your MainActivity do something like this   Button btn    Button findViewById R id open activity button        btn setOnClickListener new View OnClickListener                       Override         public void onClick View v                startActivity new Intent MainActivity this  MyOtherActivity class

User · Answer

I did the same that user9876226 answered   The only differemce is  that I don t usually use the onClickListener  Instead I write following in the xml-file  android onClick  open   open is the function  that is bound to the button  Then just create the function open   in your activity class  When you click on the button  this function will be called     Also  I think this way is more confortable than using the listener

User · Answer

If you declared your button in the xml file similar to this    lt Button         android layout width  wrap content          android layout height  wrap content          android text  next activity          android onClick  goToActivity2            gt    then you can use it to change the activity by putting this at the java file   public void goToActivity2  View view       Intent intent   new Intent  this  Main2Activity class       startActivity intent       Note that my second activity is called  Main2Activity

User · Answer

use the following code to have a button  in android studio  open an already existing activity                                           Button StartButton    Button  findViewById R id YOUR BUTTONS ID GOES HERE    StartButton setOnClickListener new View OnClickListener          Override     public void onClick View v            startActivity new Intent MainActivity this  YOUR ACTIVITY S ID GOES HERE class

User · Answer

Button T  Button findViewById R id button timer   T setOnClickListener new View OnClickListener           Override     public void onClick View v               TODO Auto-generated method stub         Intent i new Intent getApplicationContext   YOURACTIVITY class           startActivity i

[java] How do I get a button to open another activity?

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