Question

Very frustrating problem I have here. I have this code:

Button b = findViewById(android.R.id.button1);

And I’m getting this error on it:

Type mismatch: cannot convert form View to Button

But button1 is a button!! In my XML layout document the button has been declared like this:

<Button
   android:id = "@+id/button1"
   android:layout_width = "wrap_content"
   android:layout_height = "wrap_content"
   android:text = "Next Activity" 
/>

And in my R.java:

public static final class id {
   public static final int button1=0x7f050000;
}

Why I get and error saying that my button is a view when it actually is indeed a button… is a mystery.

Answer 1

You need to cast the view to Button:

Button b = (Button) findViewById(android.R.id.button1);

More details at http://docs.oracle.com/javase/tutorial/java/IandI/subclasses.html

In addition, as answered by others, the id is wrong.