我该如何启动另一个应用程序从活动（下载或preinstalled）？ [英] How do I start another application (downloaded or preinstalled) from an activity?

问题描述

基本上，我想获得的所有已安装应用程序的列表，并选择一个从活动中运行。

我已经试过ACTION_PICK与意图，但似乎离开了已下载的应用程序，它有一堆垃圾在里面。

感谢

解决方案

  //获取应用程序的列表，你可以启动
意向意图=新的意图（ACTION_MAIN）;
intent.addCategory（CATEGORY_LAUNCHER）;
名单＆LT; ResolveInfo＆GT;的相关信息= getPackageManager（）queryIntentActivities（意向，0）。

// resolveInfo.activityInfo.packageName =的packageName
// resolveInfo.activityInfo.name =的className
//重用意图
intent.setClassName（的packageName，类名）;
intent.setFlags（Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED）;
startActivity（意向）
 

希望这是足以帮助你找出。

Basically, I want to get a list of all installed apps and pick one to run from an activity.

I've tried ACTION_PICK with Intents but that seems to leave out apps that were downloaded and it has a bunch of junk in it.

Thanks

解决方案

// to get the list of apps you can launch
Intent intent = new Intent(ACTION_MAIN);
intent.addCategory(CATEGORY_LAUNCHER);
List<ResolveInfo> infos = getPackageManager().queryIntentActivities(intent, 0);

// resolveInfo.activityInfo.packageName = packageName
// resolveInfo.activityInfo.name = className
// reusing that intent
intent.setClassName(packageName, className);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
startActivity(intent)

Hope that's enough to help you figure out.

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