114_fragment界面切换

一、Fragment  类中（可以有多个Fragment  类）

public class Fragment1 extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment1, null);
Button button = (Button) view.findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub

}
});
return view;  //返回片段的View对象
}

}

二、Activities中

public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
int width = getWindowManager().getDefaultDisplay().getWidth();
int length = getWindowManager().getDefaultDisplay().getHeight();

FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();   //开启事务

 

if (width > length) {
ft.replace(android.R.id.content, new Fragment2());  //android.R.id.content 代表当前界面，也可以是其他的布局（的id）
} else {
ft.replace(android.R.id.content, new Fragment1());
}
ft.commit();   //提交事务
}

}