intent.setClass的用法，小白求助
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button b1 = (Button)findViewById(R.id.button1);
b1.setOnClickListener(new Button.OnClickListener()
{
public void onClick(View v)
{
Intent intent = new Intent();
intent.setClass(MainActivity.this, Activity2.class);
startActivity(intent);
}
});
}
}