1.隐式意图
怎么传值我就不细说了,说些一般人不知道的吧。
1)Verify There is an App to Receive the Intent(判断是否有App响应了意图)
you should always include a verification step before invoking an intent.
Caution: If you invoke an intent and there is no app available on the device that can handle the intent, your app will crash.(没有应用处理意图,应用就会挂掉。)
因为你不能保证每个手机上都有你需要的应用!
PackageManager packageManager =getPackageManager()
;
List activities = packageManager.queryIntentActivities(intent,
PackageManager.MATCH_DEFAULT_ONLY);
boolean isIntentSafe = activities.size() > 0;
If isIntentSafe
is true
, then at least one app will respond to
the intent. If it is
false
, then there aren't any apps to handle the intent.
2)
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。