判断手机上是否已安装app

 Intent intent = new Intent();
 intent.setPackage(toAppPackageName);
 intent.putExtra(Constants.KEY_UID_FROM_APP_NAME, curAppPackageName);
 intent.putExtra(Constants.KEY_UID_OP_CODE, Constants.VALUE_UID_OP_CODE_SCAN);
 intent.setAction("android.intent.action.iqiyi.sso");
 // intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 Context context = getApplicationContext();
 if (IntentTools.isIntentActionAvailable(context, intent)) {
     startActivityForResult(intent, REQUEST_CODE_FOR_SCAN_ACCOUNT);
 } else {
     // 未安装APP，跳过
     finishOneScan();
 }

 "color:#ff0000;">isIntentActionAvailable(context, intent) ？？

 public static boolean isIntentActionAvailable(Context context, Intent intent) {
     PackageManager packageManager = context.getPackageManager();
     List list = packageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
     return list != null && list.size() > 0;
 }