Android Imagebutton change Image OnClick

Question

I just added a new drawable folder under res folder  In the drawable folder  i copied the ic launcher png file from drawable-hdpi folder  I wanna change the standard ImageButton image through the new one when i press the button  I wrote some code  but when i start the app  it crashes   Button imgButton    public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main        findViewById R id imgButton  setOnClickListener imgButtonHandler            View OnClickListener imgButtonHandler   new View OnClickListener          public void onClick View v             imgButton setBackgroundResource R drawable ic launcher               EDIT  I changed to this  and this also not works    Override public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main        imgButton    Button  findViewById R id imgButton       imgButton setOnClickListener imgButtonHandler       View OnClickListener imgButtonHandler   new View OnClickListener          public void onClick View v            imgButton setBackgroundResource R drawable ic launcher               EDIT 2  THIS WORKS  Thanks to all   ImageButton button    Override public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main        button   ImageButton findViewById R id imgButton       button setOnClickListener imgButtonHandler       View OnClickListener imgButtonHandler   new View OnClickListener          public void onClick View v            button setBackgroundResource R drawable ic launcher

User · Answer

It is very simple public void onClick View v             imgButton setImageResource R drawable ic launcher           Using set Background image resource will chanage the background of the button

User · Answer

You have assing button to your imgButton variable   public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main        imgButton    Button  findViewById R id imgButton       imgButton setOnClickListener imgButtonHandler

User · Answer

To switch between different images when the ImageButton is clicked I used a boolean like this   ImageButton imageButton  boolean buttonOn   imageButton setOnClickListener new View OnClickListener           Override      public void onClick View v             if   buttonOn                 buttonOn   true               imageButton setBackground getResources   getDrawable R drawable button is on                else                buttonOn   false               imageButton setBackground getResources   getDrawable R drawable button is off

User · Answer

This misled me a bit - it should be setImageResource instead of setBackgroundResource        The following works fine    ImageButton btn    ImageButton findViewById R id imageButton1           btn setImageResource R drawable actions record     while when using the setBackgroundResource the actual imagebutton s image  stays while the background image is changed which leads to a ugly looking imageButton object   Thanks

User · Answer

That is because imgButton is null  Try this instead   findViewById R id imgButton  setBackgroundResource R drawable ic action search     or much easier to read   imgButton    Button  findViewById R id imgButton   imgButton setOnClickListener imgButtonHandler     then in onClick  imgButton setBackgroundResource R drawable ic action search

User · Answer

You can do it right in your XML file    android onClick   drawable ic action search

User · Answer

lt ImageButton android src   drawable image btn src        gt    image btn src xml   lt selector xmlns android  http   schemas android com apk res android  gt   lt item android state pressed  true  android drawable   drawable icon pressed   gt   lt item android state pressed  false  android drawable   drawable icon unpressed   gt   lt  selector gt

[android] Android Imagebutton change Image OnClick

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