Prevents the user from taking the ear photograph IF not logged in CommCare.

app/src/main/java/com/aluxoft/earrecognition/activities/EarCaptureActivity.java

@@ -12,6 +12,7 @@ import android.widget.Toast;
 
 import com.aluxoft.earrecognition.EarIdentifier;
 import com.aluxoft.earrecognition.R;
+import com.aluxoft.earrecognition.loader.EarDataLoaderCommcare;
 import com.aluxoft.earrecognition.utils.ImageUtils;
 
 import java.io.File;
@@ -76,7 +77,20 @@ public class EarCaptureActivity extends Activity {
 
         getImage = (Button)this.findViewById(R.id.extra_image_value);
         getImage.setOnClickListener(new OnClickListener() {
+
+            private Toast loginInCommCareToast = null;
+
             public void onClick(View v) {
+                if (!EarDataLoaderCommcare.checkConnection(EarCaptureActivity.this)) {
+
+                    if (loginInCommCareToast == null || loginInCommCareToast.getView().getWindowVisibility() != View.VISIBLE) {
+                        loginInCommCareToast = Toast.makeText(EarCaptureActivity.this,
+                                "Please login in CommCare application to proceed.",
+                                Toast.LENGTH_LONG);
+                        loginInCommCareToast.show();
+                    }
+                    return;
+                }
                 Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                 try {
                     location = ImageUtils.createTempImageFile();

app/src/main/java/com/aluxoft/earrecognition/loader/EarDataLoaderCommcare.java

@@ -13,6 +13,11 @@ import com.aluxoft.earrecognition.common.Person;
  */
 public class EarDataLoaderCommcare extends EarDataLoader {
 
+    public static boolean checkConnection(Activity current) {
+        Cursor c = current.managedQuery(Uri.parse("content://org.commcare.dalvik.case/casedb/case"), null, null, null, null);
+        return c != null;
+    }
+
     @Override
     public EarData load(Activity current) {