Android onNewIntent

protected void onNewIntent(Intent intent)

Added in API level 1

This is called for activities that set launchMode to "singleTop" in their package, or if a client used theFLAG_ACTIVITY_SINGLE_TOP flag when callingstartActivity(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 ononResume() being called after this method.

Note that getIntent() still returns the original Intent. You can usesetIntent(Intent) to update it to this new Intent.

Parameters

intentThe new intent that was started for the activity.

See Also

• getIntent()
• setIntent(Intent)
• onResume()

调用 onNewIntent  有两种情况：

第一种： 这个 Activity A设置为 SingleTop 启动模式。也就是位于栈顶就不新创建。

第二种： 启动一个 Activity A时把 Intent flag 设置为 FLAG_ACTIVITY_SINGLE_TOP 。













如果重新启动这个 Activity A,当 A 位于栈顶时（这样 A 不用新建实例），onNewIntent 将会被调用。

另外，如果有必要更新获取的 Intent，需要调用下 setIntent。这个方法一般也是和 onNewIntent 连用的。