【Android】Bundle/Intent 返回正確的上一頁

＜方法一＞

＜page 1＞

Intent intent = new Intent(this, xxx.class);

intent.putExtra("back_class", this.getClass().getName());

startActivity(intent);

======================================================================================

＜page2＞

String clazz = getIntent().getStringExtra("back_class");

＜方法二＞

＜page 1＞

Intent intent = new Intent();

Bundle bundle = new Bundle();

bundle.putString("header_title", getString(R.string.transaction));

bundle.putInt("header_background_color", getResources().getColor(R.color.main_func));

bundle.putString("header_back_to", "Submenu_pageA");

intentMenuItem.setClass(Submenu_pageA.this,Submenu_pageB.class);

intentMenuItem.putExtras(bundle);

startActivity(intentMenuItem);

======================================================================================

＜page 2＞

Bundle bundle = null;

public void onCreate(Bundle savedInstanceState) {

     super.onCreate(savedInstanceState);

bundle = this.getIntent().getExtras();

if(bundle.containsKey("header_back_to") && bundle.getString("header_back_to").equals("Submenu_pageA")){

  setReturnClass(Submenu_pageA.class);

}else{

  setReturnClass(HomeActivity.class);

}

}