How to get a list of installed android applications and pick one to run
I asked a similar question to this earlier this week but I'm still not understanding how to get a list of all installed applications and then pick one to run.
I've tried:
Intent intent = new Intent(ACTION_MAIN);
intent.addCategory(CATEGORY_LAUNCHER);
and this only shows application that are preinstalled or can run the ACTION_MAIN Intent type.
I also know I can use PackageManager to get all the installed applications, but how do I use this to run a specific application?
Following is the code to get the list of activities/applications installed on Android :
Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
List<ResolveInfo> pkgAppsList = context.getPackageManager().queryIntentActivities( mainIntent, 0);
You will get all the necessary data in the ResolveInfo to start a application. You can check ResolveInfo javadoc here.
Here's a cleaner way using the packageManager
final PackageManager pm = getPackageManager();
//get a list of installed apps.
List<ApplicationInfo> packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);
for (ApplicationInfo packageInfo : packages) {
Log.d(TAG, "Installed package :" + packageInfo.packageName);
Log.d(TAG, "Source dir : " + packageInfo.sourceDir);
Log.d(TAG, "Launch Activity :" + pm.getLaunchIntentForPackage(packageInfo.packageName));
}
// the getLaunchIntentForPackage returns an intent that you can use with startActivity()
More info here http://qtcstation.com/2011/02/how-to-launch-another-app-from-your-app/
另一种过滤系统应用程序的方法（适用于上述示例）：
/**
* Return whether the given PackgeInfo represents a system package or not.
* User-installed packages (Market or otherwise) should not be denoted as
* system packages.
*
* @param pkgInfo
* @return
*/
private boolean isSystemPackage(PackageInfo pkgInfo) {
return ((pkgInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) ? true
: false;
}
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