android中怎么实现界面切换？

AI

1.无参数Activity跳转

Intent it = new Intent(Activity.MAIn.this, Activity2.class);startActivity(it);

2.向下一个Activity传递数据（使用Bundle和Intent.putExtras）

Intent it = new Intent(Activity.MAIn.this, Activity2.class);Bundle bundle=new Bundle();bundle.putString("name", "This is from MAInActivity!");it.putExtras(bundle); // it.putExtra(“test”, "shuju”);startActivity(it); // startActivityForResult(it,REQUEST_CODE);

对于数据的获取可以采用：

Bundle bundle=getIntent().getExtras();String name=bundle.getString("name");

3.向上一个Activity返回结果（使用setResult，针对startActivityForResult(it,REQUEST_CODE)启动的Activity）

Intent intent=getIntent(); Bundle bundle2=new Bundle(); bundle2.putString("name", "This is from ShowMsg!"); intent.putExtras(bundle2); setResult(RESULT_OK, intent);

4.回调上一个Activity的结果处理函数（onActivityResult）

@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { // TODO Auto-generated method stub super.onActivityResult(requestCode, resultCode, data); if (requestCode==REQUEST_CODE){ if(resultCode==RESULT_CANCELED) setTitle("cancle"); else if (resultCode==RESULT_OK) { String temp=null; Bundle bundle=data.getExtras(); if(bundle!=null) temp=bundle.getString("name"); setTitle(temp); } } }