Merge pull request #21 from SumiMakito/develop

Fixed the "divide by zero" error mentioned in #20.

README.md

@@ -42,7 +42,7 @@ Then, add below lines in build.gradle of your app module:
 
 ```
 dependencies {
-        compile 'com.github.SumiMakito:AwesomeQRCode:1.0.5'
+        compile 'com.github.SumiMakito:AwesomeQRCode:latest'
 }
 ```
 
@@ -112,8 +112,10 @@ logoScale | float | Value used to scale the logo image. Larger value may result
 
 ## Changelog
 
-### Version 1.0.5
+#### Version 1.0.6
+- Fixed a "divide by zero" error mentioned in [#20](https://github.com/SumiMakito/AwesomeQRCode/issues/20).
 
+#### Version 1.0.5
 - The way to use AwesomeQRCode is more elegant.
 
 ### Version 1.0.4

library/build.gradle

@@ -6,8 +6,8 @@ android {
     defaultConfig {
         minSdkVersion 9
         targetSdkVersion 25
-        versionCode 6
-        versionName "1.0.5"
+        versionCode 7
+        versionName "1.0.6"
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 

library/src/main/java/com/github/sumimakito/awesomeqr/AwesomeQRCode.java

@@ -374,10 +374,16 @@ private static int getDominantColor(Bitmap bitmap) {
             }
         }
         newBitmap.recycle();
-        red = Math.max(0, Math.min(0xFF, red / c));
-        green = Math.max(0, Math.min(0xFF, green / c));
-        blue = Math.max(0, Math.min(0xFF, blue / c));
-        return (0xFF << 24) | (red << 16) | (green << 8) | blue;
+        if(c==0){
+            // got a bitmap with no pixels in it
+            // avoid the "divide by zero" error
+            return 0xFF000000;
+        }else {
+            red = Math.max(0, Math.min(0xFF, red / c));
+            green = Math.max(0, Math.min(0xFF, green / c));
+            blue = Math.max(0, Math.min(0xFF, blue / c));
+            return (0xFF << 24) | (red << 16) | (green << 8) | blue;
+        }
     }
 
     private static void binarize(Bitmap bitmap, int threshold) {