Added l10n for ZXing intent message box

Closes #2147

res/values/strings.xml

@@ -219,6 +219,8 @@
 
     <!-- KeyScanningActivity -->
     <string name="KeyScanningActivity_no_scanned_key_found_exclamation">No scanned key found!</string>
+    <string name="KeyScanningActivity_install_barcode_Scanner">Install Barcode Scanner?</string>
+    <string name="KeyScanningActivity_this_application_requires_barcode_scanner_would_you_like_to_install_it">TextSecure needs Barcode Scanner for QR codes.</string>
 
     <!-- MmsDownloader -->
     <string name="MmsDownloader_error_storing_mms">Error storing MMS!</string>

src/org/thoughtcrime/securesms/KeyScanningActivity.java

@@ -28,6 +28,7 @@ import com.google.zxing.integration.android.IntentResult;
 
 import org.thoughtcrime.securesms.util.Base64;
 import org.thoughtcrime.securesms.util.Dialogs;
+import org.thoughtcrime.securesms.util.DynamicLanguage;
 import org.thoughtcrime.securesms.util.DynamicTheme;
 import org.whispersystems.libaxolotl.IdentityKey;
 
@@ -38,11 +39,13 @@ import org.whispersystems.libaxolotl.IdentityKey;
  */
 public abstract class KeyScanningActivity extends PassphraseRequiredActionBarActivity {
 
-  private final DynamicTheme dynamicTheme = new DynamicTheme();
+  private final DynamicTheme    dynamicTheme    = new DynamicTheme();
+  private final DynamicLanguage dynamicLanguage = new DynamicLanguage();
 
   @Override
   protected void onCreate(Bundle bundle) {
     dynamicTheme.onCreate(this);
+    dynamicLanguage.onCreate(this);
     super.onCreate(bundle);
   }
 
@@ -50,6 +53,7 @@ public abstract class KeyScanningActivity extends PassphraseRequiredActionBarAct
   public void onResume() {
     super.onResume();
     dynamicTheme.onResume(this);
+    dynamicLanguage.onResume(this);
   }
 
   @Override
@@ -98,13 +102,22 @@ public abstract class KeyScanningActivity extends PassphraseRequiredActionBarAct
     }
   }
 
-  protected void initiateScan() {
+  private IntentIntegrator getIntentIntegrator() {
     IntentIntegrator intentIntegrator = new IntentIntegrator(this);
+    intentIntegrator.setButtonYesByID(R.string.yes);
+    intentIntegrator.setButtonNoByID(R.string.no);
+    intentIntegrator.setTitleByID(R.string.KeyScanningActivity_install_barcode_Scanner);
+    intentIntegrator.setMessageByID(R.string.KeyScanningActivity_this_application_requires_barcode_scanner_would_you_like_to_install_it);
+    return intentIntegrator;
+  }
+
+  protected void initiateScan() {
+    IntentIntegrator intentIntegrator = getIntentIntegrator();
     intentIntegrator.initiateScan();
   }
 
   protected void initiateDisplay() {
-    IntentIntegrator intentIntegrator = new IntentIntegrator(this);
+    IntentIntegrator intentIntegrator = getIntentIntegrator();
     intentIntegrator.shareText(Base64.encodeBytes(getIdentityKeyToDisplay().serialize()));
   }