public class MainActivity extends ActionBarActivity {
private LinearLayout root;
private Button btnClickme;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
** root=new LinearLayout(this);**
}
}
中就如“root=new LinearLayout(this);”这行,为什么后面括号要this,因为最前面有两个定义的原因么?。如果没有前面两个定义后面括号里还要不要this?