How to change ImageView source in android

Question

This is my xml, this is located inside a fragment that appears in my activity.

<FrameLayout                     android:id="@+id/frame1"                     android:layout_width="wrap_content"                     android:layout_height="115dp"                     android:layout_margin="2dp"                     android:layout_weight="0.33">                      <ImageView                         android:id="@+id/whoamiwith"                         android:layout_width="match_parent"                         android:layout_height="match_parent"                         android:scaleType="fitCenter"                         android:src="@drawable/default_image" />                 </FrameLayout> 

And this is my java code :

@Override public void onClick(View click) {     if (click == profileBtn) {         whoamiwith.setBackgroundResource(R.drawable.image_i_wanna_put);     } } 

I am trying to change the image source of the image view. There are no syntax errors but when I click the button the emulator is giving me a force close and on the logcat it says:

java.lang.NullPointerException

It's pointing to the line:

whoamiwith.setBackgroundResource(R.drawable.loginbtn); 

Answer 1

whoamiwith.setImageResource(R.drawable.loginbtn);