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如何创建条码扫描器（Android）？

发布于 2024-12-14 02:50:24 字数 114 浏览 0 评论 0原文

有人可以告诉我创建条形码扫描仪应用程序（适用于 Android）是否困难？ OpenCV 库是一个好的开始吗？在哪里可以找到清楚解释如何读取条形码的算法？我将感谢所有有关该主题的好材料！

提前致谢！

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定格我的天空 2024-12-21 02:50:24

ZXing 项目提供了一个独立的条形码读取器应用程序，通过 Android 的意图机制，可以由希望集成条形码扫描的其他应用程序调用。

最简单的方法是从应用程序中调用 ZXing SCAN Intent，如下所示：

public Button.OnClickListener mScan = new Button.OnClickListener() {
    public void onClick(View v) {
        Intent intent = new Intent("com.google.zxing.client.android.SCAN");
        intent.putExtra("SCAN_MODE", "QR_CODE_MODE");
        startActivityForResult(intent, 0);
    }
};

public void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if (requestCode == 0) {
        if (resultCode == RESULT_OK) {
            String contents = intent.getStringExtra("SCAN_RESULT");
            String format = intent.getStringExtra("SCAN_RESULT_FORMAT");
            // Handle successful scan
        } else if (resultCode == RESULT_CANCELED) {
            // Handle cancel
        }
    }
}

按下链接到 mScan 的按钮将直接启动到 ZXing 条码扫描仪屏幕（如果未安装 ZXing，则崩溃）。识别条形码后，您将在活动中的内容变量中收到结果。

为了避免崩溃并为您简化事情，ZXing 有 提供了一个实用程序类，您可以将其集成到您的应用程序中，通过将用户重定向到 Android 来使 ZXing 的安装更加顺利如果他们还没有安装的话，就去市场吧。

最后，如果您想将条形码扫描直接集成到您的应用程序中，而不依赖于安装单独的 ZXing 应用程序，那么它是一个开源项目，您可以这样做！ :)

The ZXing project provides a standalone barcode reader application which — via Android's intent mechanism — can be called by other applications who wish to integrate barcode scanning.

The easiest way to do this is to call the ZXing SCAN Intent from your application, like this:

public Button.OnClickListener mScan = new Button.OnClickListener() {
    public void onClick(View v) {
        Intent intent = new Intent("com.google.zxing.client.android.SCAN");
        intent.putExtra("SCAN_MODE", "QR_CODE_MODE");
        startActivityForResult(intent, 0);
    }
};

public void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if (requestCode == 0) {
        if (resultCode == RESULT_OK) {
            String contents = intent.getStringExtra("SCAN_RESULT");
            String format = intent.getStringExtra("SCAN_RESULT_FORMAT");
            // Handle successful scan
        } else if (resultCode == RESULT_CANCELED) {
            // Handle cancel
        }
    }
}

Pressing the button linked to mScan would launch directly into the ZXing barcode scanner screen (or crash if ZXing isn't installed). Once a barcode has been recognised, you'll receive the result in your Activity, here in the contents variable.

To avoid the crashing and simplify things for you, ZXing have provided a utility class which you could integrate into your application to make the installation of ZXing smoother, by redirecting the user to the Android Market if they don't have it installed already.

Finally, if you want to integrate barcode scanning directly into your application without relying on having the separate ZXing application installed, well then it's an open source project and you can do so! :)

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