ZBar掃描儀QR只有

Question

我使用ZBar QR掃描儀爲我的Android應用程序。一切運行良好，沒有問題與圖書館和設置。問題是我想讓ZBar只掃描QR碼而沒有條碼。

有沒有辦法做到這一點？怎麼樣？

這是我的掃描活動代碼：

import net.sourceforge.zbar.Config; 
import net.sourceforge.zbar.Image; 
import net.sourceforge.zbar.ImageScanner; 
import net.sourceforge.zbar.Symbol; 
import net.sourceforge.zbar.SymbolSet; 


import android.app.Activity; 
import android.content.Intent; 
import android.content.pm.ActivityInfo; 
import android.content.res.Resources; 
import android.graphics.Color; 
import android.hardware.Camera; 
import android.hardware.Camera.AutoFocusCallback; 
import android.hardware.Camera.PreviewCallback; 
import android.hardware.Camera.Size; 
import android.os.Bundle; 
import android.os.Handler; 
import android.util.Log; 
import android.util.TypedValue; 
import android.view.Gravity; 
import android.view.View; 
import android.view.ViewGroup.LayoutParams; 
import android.widget.Button; 
import android.widget.FrameLayout; 
import android.widget.TextView; 

public class QRScanActivity extends Activity { 
    private Camera mCamera; 
    private CameraPreview mPreview; 
    private Handler autoFocusHandler; 

    TextView scanText; 
    Button scanButton; 

    ImageScanner scanner; 

    private boolean barcodeScanned = false; 
    private boolean previewing = true; 

    static { 
     System.loadLibrary("iconv"); 
    } 

    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     setContentView(R.layout.activity_qrscan); 

     setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); 

     autoFocusHandler = new Handler(); 
     mCamera = getCameraInstance(); 

     // Instance barcode scanner 
     scanner = new ImageScanner(); 
     scanner.setConfig(0, Config.X_DENSITY, 3); 
     scanner.setConfig(0, Config.Y_DENSITY, 3); 

     mPreview = new CameraPreview(this, mCamera, previewCb, autoFocusCB); 
     FrameLayout preview = (FrameLayout) findViewById(R.id.cameraPreview); 
     preview.addView(mPreview); 



    } 

    public void onPause() { 
     super.onPause(); 
     releaseCamera(); 
    } 

    /** A safe way to get an instance of the Camera object. */ 
    public static Camera getCameraInstance() { 
     Camera c = null; 
     try { 
      c = Camera.open(); 
     } catch (Exception e) { 
     } 
     return c; 
    } 

    private void releaseCamera() { 
     if (mCamera != null) { 
      previewing = false; 
      mCamera.setPreviewCallback(null); 
      mCamera.release(); 
      mCamera = null; 
     } 
    } 

    private Runnable doAutoFocus = new Runnable() { 
     public void run() { 
      if (previewing) 
       mCamera.autoFocus(autoFocusCB); 
     } 
    }; 

    PreviewCallback previewCb = new PreviewCallback() { 
     public void onPreviewFrame(byte[] data, Camera camera) { 
      Camera.Parameters parameters = camera.getParameters(); 
      Size size = parameters.getPreviewSize(); 

      Image barcode = new Image(size.width, size.height, "Y800"); 
      barcode.setData(data); 

      int result = scanner.scanImage(barcode); 
      Log.d("ZbarScanner",result+""); 

      if (result != 0) { 
       previewing = false; 
       mCamera.setPreviewCallback(null); 
       mCamera.stopPreview(); 

       SymbolSet syms = scanner.getResults(); 
       for (Symbol sym : syms) { 
        barcodeScanned = true; 

        Intent returnIntent = new Intent(); 
        returnIntent.putExtra("result",sym.getData()); 
        setResult(RESULT_OK,returnIntent); 
        finish(); 

       } 
      } 
     } 
    }; 

    // Mimic continuous auto-focusing 
    AutoFocusCallback autoFocusCB = new AutoFocusCallback() { 
     public void onAutoFocus(boolean success, Camera camera) { 
      autoFocusHandler.postDelayed(doAutoFocus, 1000); 
     } 
    }; 
    public void backToMain(View v){ 
     Intent returnIntent = new Intent(); 
     setResult(RESULT_CANCELED, returnIntent); 
     finish(); 
    } 
} 

Answer 1

您可以添加圖象掃描這些代碼

scanner.setConfig(0, Config.ENABLE, 0); //Disable all the Symbols 
scanner.setConfig(Symbol.QRCODE, Config.ENABLE, 1); //Only QRCODE is enable 

此外，您還可以使用意圖行動「org.magiclen.barcodescanner.SCAN」使用基於zbar的條碼掃描器。

final Intent intent = new Intent("org.magiclen.barcodescanner.SCAN"); 
final List<ResolveInfo> list = getPackageManager().queryIntentActivities(intent, PackageManager.GET_ACTIVITIES); 
if (list.size() > 0) { 
    intent.putExtra("SCAN_MODE", "QR_CODE_MODE"); // Can also use PRODUCT_MODE, SCAN_MODE,  QR_CODE_MODE 
    startActivityForResult(intent, 0); 
} else { 
    // You may ask your user to install Easy Barcode Scanner 
} 

要獲得掃描結果，必須重寫onActivityResult方法：

public void onActivityResult(final int requestCode, final int resultCode, final Intent data) { 
    if (requestCode == 0) { 
      if (resultCode == Activity.RESULT_OK) { 
        final String result = data.getStringExtra("SCAN_RESULT"); // Get scanning result 
        final String type = data.getStringExtra("code_type"); // Get code type 
      } else { 
        // Not scan any code yet 
      } 
    } 
}