获取默认的launcher和所有的launcher

获取默认的launcher

Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
ResolveInfo resolveInfo = getPackageManager().resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
String currentHomePackage = resolveInfo.activityInfo.packageName;

获取所有的lancher

PackageManager pm = getPackageManager();
Intent i = new Intent("android.intent.action.MAIN");
i.addCategory("android.intent.category.HOME");
List<ResolveInfo> lst = pm.queryIntentActivities(i, 0);
if (lst != null) {
   for (ResolveInfo resolveInfo : lst) {
        Log.d("Test", "New Launcher Found: " + resolveInfo.activityInfo.packageName);
   }
}