public static void startApkActivity(final Context ctx, String packageName) {              PackageManager pm = ctx.getPackageManager();              PackageInfo pi;              try {                  pi = pm.getPackageInfo(packageName, 0);                  Intent intent = new Intent(Intent.ACTION_MAIN, null);                  intent.addCategory(Intent.CATEGORY_LAUNCHER);                  intent.setPackage(pi.packageName);                    List<ResolveInfo> apps = pm.queryIntentActivities(intent, 0);                    ResolveInfo ri = apps.iterator().next();                  if (ri != null) {                      String className = ri.activityInfo.name;                      intent.setComponent(new ComponentName(packageName, className));                      ctx.startActivity(intent);                  }              } catch (NameNotFoundException e) {                  Log.e("startActivity", e);              }          }