Redefine the default activity request code for using switch statement.

sample/src/main/java/example/zxing/MainActivity.java

@@ -21,6 +21,8 @@
 
 public class MainActivity extends AppCompatActivity {
 
+    public final int CUSTOMIZED_REQUEST_CODE = 0x0000ffff;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -31,6 +33,10 @@ public void scanBarcode(View view) {
         new IntentIntegrator(this).initiateScan();
     }
 
+    public void scanBarcodeWithCustomizedRequestCode(View view) {
+        new IntentIntegrator(this, CUSTOMIZED_REQUEST_CODE).initiateScan();
+    }
+
     public void scanBarcodeInverted(View view){
         IntentIntegrator integrator = new IntentIntegrator(this);
         integrator.addExtra(Intents.Scan.INVERTED_SCAN, true);
@@ -87,6 +93,18 @@ public void tabs(View view) {
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
+        switch (requestCode) {
+            case CUSTOMIZED_REQUEST_CODE: {
+                Toast.makeText(this, "REQUEST_CODE = " + requestCode, Toast.LENGTH_LONG).show();
+                break;
+            }
+            case IntentIntegrator.REQUEST_CODE: {
+                Toast.makeText(this, "IntentIntegrator default REQUEST_CODE = " + requestCode, Toast.LENGTH_LONG).show();
+                break;
+            }
+            default:
+                break;
+        }
         if(result != null) {
             if(result.getContents() == null) {
                 Log.d("MainActivity", "Cancelled scan");

sample/src/main/res/layout/activity_main.xml

@@ -19,6 +19,12 @@
             android:text="@string/scan_barcode"
             android:onClick="scanBarcode"/>
 
+        <Button
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/scan_barcode_with_request_code"
+            android:onClick="scanBarcodeWithCustomizedRequestCode"/>
+
         <Button
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"

sample/src/main/res/values/strings.xml

@@ -3,6 +3,7 @@
 
     <string name="app_name">ZXing Sample</string>
     <string name="scan_barcode">Scan Barcode</string>
+    <string name="scan_barcode_with_request_code">Scan Barcode with customized request code</string>
     <string name="any_orientation">1D Any Orientation</string>
     <string name="scan_from_fragment">Scan from fragment</string>
     <string name="front_camera">Front Camera</string>

zxing-android-embedded/src/com/google/zxing/integration/android/IntentIntegrator.java

@@ -44,7 +44,9 @@
 @SuppressWarnings("unused")
 public class IntentIntegrator {
 
-    public static int REQUEST_CODE = 0x0000c0de; // Only use bottom 16 bits
+    public static final int REQUEST_CODE = 0x0000c0de; // Only use bottom 16 bits
+    private static int requestCodeValue;
+
     private static final String TAG = IntentIntegrator.class.getSimpleName();
 
     // supported barcode formats
@@ -73,8 +75,18 @@ protected Class<?> getDefaultCaptureActivity() {
     /**
      * @param activity {@link Activity} invoking the integration
      */
+    public IntentIntegrator(Activity activity, int request_code) {
+        this.activity = activity;
+        if (request_code > 0 && request_code <= 0x0000ffff) {
+            requestCodeValue = request_code;
+        } else {
+            requestCodeValue = REQUEST_CODE;
+        }
+    }
+
     public IntentIntegrator(Activity activity) {
         this.activity = activity;
+        requestCodeValue = REQUEST_CODE;
     }
 
     public Class<?> getCaptureActivity() {
@@ -199,7 +211,7 @@ public IntentIntegrator setDesiredBarcodeFormats(Collection<String> desiredBarco
      * Initiates a scan for all known barcode types with the default camera.
      */
     public final void initiateScan() {
-        startActivityForResult(createScanIntent(), REQUEST_CODE);
+        startActivityForResult(createScanIntent(), requestCodeValue);
     }
 
     /**
@@ -297,7 +309,7 @@ protected void startActivity(Intent intent) {
      * the fields will be null.
      */
     public static IntentResult parseActivityResult(int requestCode, int resultCode, Intent intent) {
-        if (requestCode == REQUEST_CODE) {
+        if (requestCode == requestCodeValue) {
             if (resultCode == Activity.RESULT_OK) {
                 String contents = intent.getStringExtra(Intents.Scan.RESULT);
                 String formatName = intent.getStringExtra(Intents.Scan.RESULT_FORMAT);