ZXING意图请求代码(标识我的意图) [英] ZXING intent request code (identifying my intent)

问题描述

在我的Android APP中，每当我需要从同一个Activity调用许多不同的ActivitiesForResult时，我都会这样做:

In my Android APP, whenever I need to call many different ActivitiesForResult from the same Activity, I do it like this:

public void firstMethod() {
    int requestCode = 1;
    Intent intent = new Intent(SomeCode1.class);
    startActivityForResult(intent,requestCode);
}

public void secondMethod()  {
    int requestCode = 2;
    Intent intent = new Intent(SomeCode2.class);
    startActivityForResult(intent,requestCode);
}

要知道它的意图，我就这样认识他们:

And to know which intent it came from, I recognize them like this:

  public void onActivityResult(int requestCode, int resultCode, Intent data) {
  switch (requestCode) {
        case 1: {
              // some code 
        } case 2: {
              // some code
        }
  }

我正在尝试从同一活动中两次调用ZXING条码扫描器，但我不知道如何用它设置请求代码.

I am trying to call the ZXING barcode Scanner twice from the same activity, and I do not know how to set a request code with it.

    IntentIntegrator intentintegrator= new IntentIntegrator(this);
    IntentIntegrator.initiateScan(ZxingIntent.QR_CODE_TYPES);

有人知道如何做到这一点吗?我需要修改IntentIntegrator代码吗?

Does anybody know how to accomplish this? Do I need to modify the IntentIntegrator code?

推荐答案

我看到2种解决方案.一种可能是创建一个新活动，仅调用IntentIntegrator并将requestCode放入此新活动中.

I see 2 solutions. One would be creating a new activity, just to call the IntentIntegrator and putting the requestCode to this new activity.

第二个选项是修改IntentIntegrator-这就是我所做的.

Second option was to modify the IntentIntegrator - which is what I did.

我删除了最终属性，

// public static final int REQUEST_CODE = 0x0000c0de;
public static int REQUEST_CODE = 0x0000c0de;

添加了设置请求代码的功能:

added the function to set the request code:

  public void setRequestCode(int requestCode) {
    REQUEST_CODE = requestCode;
  }

并且正在像这样调用条形码扫描器:

and am calling the Barcode Scanner like this:

    int requestCode = 2;
    IntentIntegrator intentintegrator= new IntentIntegrator (this);
    intentintegrator.setRequestCode(requestCode);
    intentintegrator.initiateScan(ZxingIntent.QR_CODE_TYPES);

我不知道RequestCode 0x0000c0de的用途是什么，为什么它是最终的，但该应用程序似乎可以正常工作.

I do not know what the RequestCode 0x0000c0de is for and why it is final, but the app seems to work.

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