blocks|key|1678381|text|//+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+%7C+Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
startActivity(intent)|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1678382|希望这足以帮助你弄清楚。|unstyled|1678383|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>// to get the list of apps you can launch
Intent intent = new Intent(ACTION_MAIN);
intent.addCategory(CATEGORY_LAUNCHER);
List&lt;ResolveInfo&gt; 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)
</code></pre>

Hope that's enough to help you figure out.

blocks|key|3086707|text|final+File+favFile+=+new+File(Environment.getRootDirectory(),+DEFAULT_FAVORITES_PATH);
++++++++++++try+{
++++++++++++++++favReader+=+new+FileReader(favFile);
++++++++++++}+catch+(FileNotFoundException+e)+{
++++++++++++++++Log.e(LOG_TAG,+"Couldn't+find+or+open+favorites+file+"+%2B+favFile);
++++++++++++++++return;
++++++++++++}//gives+the+path+for+downloaded+apps+in+directory







+private+void+loadApplications(boolean+isLaunching)+{
++++++++if+(isLaunching+&&+mApplications+!=+null)+{
++++++++++++return;
++++++++}

++++++++PackageManager+manager+=+getPackageManager();

++++++++Intent+mainIntent+=+new+Intent(Intent.ACTION_MAIN,+null);
++++++++mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);

++++++++final+List<ResolveInfo>+apps+=+manager.queryIntentActivities(mainIntent,+0);
++++++++Collections.sort(apps,+new+ResolveInfo.DisplayNameComparator(manager));

++++++++if+(apps+!=+null)+{
++++++++++++final+int+count+=+apps.size();

++++++++++++if+(mApplications+==+null)+{
++++++++++++++++mApplications+=+new+ArrayList<ApplicationInfo>(count);
++++++++++++}
++++++++++++mApplications.clear();

++++++++++++for+(int+i+=+0;+i+<+count;+i%2B%2B)+{
++++++++++++++++++ApplicationInfo+application+=+new+ApplicationInfo();
++++++++++++++++ResolveInfo+info+=+apps.get(DEFAULT_KEYS_SEARCH_LOCAL);

++++++++++++++++application.title+=+info.loadLabel(manager);
++++++++++++++++application.setActivity(new+ComponentName(
++++++++++++++++++++++++info.activityInfo.applicationInfo.packageName,
++++++++++++++++++++++++info.activityInfo.name),
++++++++++++++++++++++++Intent.FLAG_ACTIVITY_NEW_TASK
++++++++++++++++++++++++%7C+Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
++++++++++++++++application.icon+=+info.activityInfo.loadIcon(manager);

++++++++++++++++mApplications.add(application);

++++++++}
++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3086708|这将帮助你加载所有下载的应用程序。|unstyled|3086709|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>final File favFile = new File(Environment.getRootDirectory(), DEFAULT_FAVORITES_PATH);
 try {
 favReader = new FileReader(favFile);
 } catch (FileNotFoundException e) {
 Log.e(LOG_TAG, "Couldn't find or open favorites file " + favFile);
 return;
 }//gives the path for downloaded apps in directory







 private void loadApplications(boolean isLaunching) {
 if (isLaunching &amp;&amp; mApplications != null) {
 return;
 }

 PackageManager manager = getPackageManager();

 Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
 mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);

 final List&lt;ResolveInfo&gt; apps = manager.queryIntentActivities(mainIntent, 0);
 Collections.sort(apps, new ResolveInfo.DisplayNameComparator(manager));

 if (apps != null) {
 final int count = apps.size();

 if (mApplications == null) {
 mApplications = new ArrayList&lt;ApplicationInfo&gt;(count);
 }
 mApplications.clear();

 for (int i = 0; i &lt; count; i++) {
 ApplicationInfo application = new ApplicationInfo();
 ResolveInfo info = apps.get(DEFAULT_KEYS_SEARCH_LOCAL);

 application.title = info.loadLabel(manager);
 application.setActivity(new ComponentName(
 info.activityInfo.applicationInfo.packageName,
 info.activityInfo.name),
 Intent.FLAG_ACTIVITY_NEW_TASK
 | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
 application.icon = info.activityInfo.loadIcon(manager);

 mApplications.add(application);

 }
 }
</code></pre>

This will help u to load all the apps downloaded.

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

How do I start another application (downloaded or preinstalled) from an activity?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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基本上，我希望获得所有已安装应用程序的列表，并从活动中选择一个来运行。我有意无意地尝试过ACTION_PICK，但它似乎遗漏了下载的应用程序，而且里面有一堆垃圾。谢谢

问如何从活动中启动另一个应用程序(下载或预装)？
EN

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问如何从活动中启动另一个应用程序(下载或预装)？EN