Question

我需要构建一个可识别QR码的应用，而不必强迫用户安装其他应用。将来，我还需要在识别代码之前操作扫描图像（我扫描的代码会反转颜色）。

尝试从这些链接中了解提示和教程：
Integrating the ZXing library directly into my Android application
Embedding ZXing in android app
http://karanbalkar.com/2013/12/tutorial-65-implement-barcode-scanner-using-zxing-in-android/

创建一些基本代码并运行应用程序后，单击“扫描”按钮，出现No Activity found to handle Intent { act=com.google.zxing.client.android.SCAN (has extras) }

错误

我做了什么：
创建新项目
将core-3.2.1.jar复制到libs /
添加意图调用和结果处理

我添加的意图/结果代码：

private Button scan;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    scan= (Button)findViewById(R.id.btnScan);

    scan.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            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
            MultiFormatWriter writer = new MultiFormatWriter();


        } else if (resultCode == RESULT_CANCELED) {
            // Handle cancel
            Log.i("App","Scan unsuccessful");
        }
    }
}

如何启动意图？我做错了什么？

Answer 1

你应该像这样启动扫描：

@Override
    public void onClick(View v) {
      IntentIntegrator integrator = new IntentIntegrator(MainActivity.this);
      integrator.setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES);
      //in case you want to customize a bit.
      integrator.setPrompt("Scan a QR/Bar code");
      integrator.setCameraId(0);
      integrator.setBeepEnabled(false);
      integrator.initiateScan();
    }

接收这样的结果：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
        case IntentIntegrator.REQUEST_CODE: {
            if (resultCode != RESULT_CANCELED) {
                IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
                String data = scanResult.getContents();
                // use this data
            } else {
                // error
            }
            break;
        }
    }
}

编辑1：

将此项添加到您应用的build.gradle dependencies：

compile 'com.journeyapps:zxing-android-embedded:3.0.2@aar'
compile 'com.google.zxing:core:3.2.0'

Answer 2

尝试以下链接，对我有用：

https://github.com/dlazaro66/QRCodeReaderView

在我的应用程序中集成ZXing

2 个答案: