title: Android start flash in zxing library
body: <p>i made an android app using zxing library for barcode scan. barcode reader start when i tap on button, this is the code:</p>
  
  <pre><code>//scan
      mScanBtn = (Button)findViewById(R.id.scan);
      mScanBtn.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
              try {
  
                  Intent intent = new Intent(
                          "com.google.zxing.client.android.SCAN");
                  intent.setPackage("com.app.myapp");
                  intent.putExtra("SCAN_MODE", "ONE_D_MODE");
                  startActivityForResult(intent, 0);
  
              } catch (Exception e) {
  
                  e.printStackTrace();
  
              }
          }
      });
  </code></pre>
  
  <p>This code works fine and barcode scanner start. But i want to start also ledflashlight (if present) when barcode reader start. There is a way to start flashlight when zxing library start?</p>