QR码在限制区域内扫描

Question

我是android的新手。我正在使用Google vision-api依赖于Qr代码扫描，请点击以下链接：

https://www.youtube.com/watch?v=INVNULTm56o。

但它扫描整个屏幕。如果我想从限制区域或边界读取Qr代码而不最小化屏幕是否可能？让我知道谢谢。

我在我的应用程序中设计了这个边界，我只想从边界读取Qr代码： -

Answer 1

您可以将Zxing Library用于 QR码扫描 r以及条码扫描器。

如果您想自定义布局：

• https://stackoverflow.com/a/49105489/8448886

您还可以使用此库处理onCreate()，onResume()，onPause()。

build.gradle（模块：应用）文件

compile 'me.dm7.barcodescanner:zxing:1.9'

Java代码 ScanActivity ：

public class ScanActivity extends AppCompatActivity implements ZXingScannerView.ResultHandler{

private ZXingScannerView mScannerView;

@Override
public void onCreate(Bundle state) {
    super.onCreate(state);
    mScannerView = new ZXingScannerView(this);   // Programmatically initialize the scanner view
    setContentView(mScannerView);                // Set the scanner view as the content view
}

@Override
public void onResume() {
    super.onResume();
    mScannerView.setResultHandler(this); // Register ourselves as a handler for scan results.
    mScannerView.startCamera();          // Start camera on resume
}

@Override
public void onPause() {
    super.onPause();
    mScannerView.stopCamera();           // Stop camera on pause
}

@Override
public void handleResult(Result rawResult) {
    // Do something with the result here
    Log.v("tag", rawResult.getText()); // Prints scan results
    Log.v("tag", rawResult.getBarcodeFormat().toString()); // Prints the scan format (qrcode, pdf417 etc.)



    // If you would like to resume scanning, call this method below:
    //mScannerView.resumeCameraPreview(this);
}
}

您将获得扫描仪结果：

@Override
public void handleResult(Result rawResult) {
    // Do something with the result here
     Log.v("tag", rawResult.getText()); // Prints scan results
     Log.v("tag", rawResult.getBarcodeFormat().toString()); // Prints the scan format (qrcode, pdf417 etc.)



    // If you would like to resume scanning, call this method below:
    //mScannerView.resumeCameraPreview(this);
}