Cannot resolve method startActivity()

Question

I\'m new to the android development and having a bit of a problem changing activities. I am trying to change activities from within a method but I am getting the error can

Answer 1

You should use the context of your adapter:

public void open301(View view) {
  Intent openThree = new Intent(context,ThreeZeroOne.class);
  context.startActivity(openThree);
}

Answer 2

To start a new activity you will need a context to start from, and your current activity "BaseAdapter" is not a Context, luckly every view has a Context, so you can do like this:

public void open301(View view) {
    Intent openThree = new Intent(view.getContext(), ThreeZeroOne.class);
    view.getContext().startActivity(openThree);
}

Answer 3

First you should get your Context:

private Context context;

public CustomAdapter(Context context) {
    this.context = context;
}

And then:

context.startActivity(openThree);

Answer 4

you can also pass messages

 Intent i = new Intent( getContext(),Chat.class);
            i.putExtra("id",user.id);
            i.putExtra("name",user.name);
            getContext().startActivity(i);