Activity is launching as a new task, so cancelling activity result.” 解决方法

末蓝、 2022-06-18 10:14 193阅读 0赞

原文：[http://hi.baidu.com/yimifeitian/blog/item/f5f3ddfd066b6deafd037ffb.html][http_hi.baidu.com_yimifeitian_blog_item_f5f3ddfd066b6deafd037ffb.html]

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 1.startActivityForResult(Intent intent,&nbsp;Int requestCode); 
 2.setResut(int resultCode, Intent intent); 
 3.onActivityResult(int requestCode, int resultCode, Intent intent); 
 &nbsp; 
 注意事项： 
 1.最近使用startActivityForResult，出错，跟踪后发现activity并没有被启动，而是直接执行onActivityResult。后查看日志发现 
 “05-19 02:11:19.822: WARN/ActivityManager(67): Activity is launching as a new task, so cancelling activity result.” 
 原来是我把要启动的activity的launchmode设置成singleTask了。 
 把目标activity的launchmode去掉，正确。 
 总结：目标activity的launchmode不能设置成singleTask。 
 2.requestCode值&gt;=0，否则，startActivityForResult就变成了startactivity 
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