Android onNewIntent

protected void onNewIntent(Intent

API level 1

This is called for activities that set launchMode to "singleTop" in their package, or if a client used the ​

​FLAG_ACTIVITY_SINGLE_TOP​

​​ flag when calling ​

​startActivity(Intent)​

​. In either case, when the activity is re-launched while at the top of the activity stack instead of a new instance of the activity being started, onNewIntent() will be called on the existing instance with the Intent that was used to re-launch it.

An activity will always be paused before receiving a new intent, so you can count on ​

​onResume()​

​ being called after this method.

Note that ​

​getIntent()​

​​ still returns the original Intent. You can use ​

​setIntent(Intent)​

​ to update it to this new Intent.

Parameters

intent

The new intent that was started for the activity.

See Also

• ​

  ​getIntent()​

  ​
• ​

  ​setIntent(Intent)​

  ​
• ​

  ​onResume()​

  ​

調用 onNewIntent  有兩種情況：

第一種： 這個 Activity A設定為 SingleTop 啟動模式。也就是位于棧頂就不新建立。

第二種： 啟動一個 Activity A時把 Intent flag 設定為 ​

​FLAG_ACTIVITY_SINGLE_TOP​

​

​

​如果重新啟動這個 Activity A,當 A 位于棧頂時（這樣 A 不用建立執行個體），onNewIntent 将會被調用。​

​

另外，如果有必要更新擷取的 Intent，需要調用下 setIntent。這個方法一般也是和 onNewIntent 連用的。