“Could not find a method .. in the activity class .. for onClick handler”

Question

I am working on my first android project. I am using the thinkgear api. I have two activities. I have an intent in the first activity calling to start the second activity. I

Answer 1

See the Documentation, in this example sendMessage method uses:

a View as its only parameter (this will be the View that was clicked).

Your error:

Could not find a method play(View) in the activity class com.example.mindwave1.SecondPageActivity for onClick handler on view class android.widget.Button with id 'button1'  

You need to use the View parameter in your method. The solution:

public void play(View view){
    ...
}  

Answer 2

Woah format that log or something in the future. Your problem is

Could not find a method play(View) in the activity class com.example.mindwave1.SecondPageActivity for onClick handler on view class android.widget.Button with id 'button1' 04-16 16:39:51.676: E/AndroidRuntime(13927):

You probably have a function "play" defined on the onclick xml attribute. This function passes in the view as well, so your method signature needs to look like

public void play(View view){
... 
}

Answer 3

Your method

public void play(){

is missing the parameter

public void play(View v){