Improve java api

CHANGELOG.md

@@ -0,0 +1,10 @@
+Version 0.0.2
+----------------------------
+
+Improve Java api
+
+
+Version 0.0.1
+----------------------------
+
+Initial release.

README.md

@@ -27,10 +27,10 @@ android {
 }
 
 dependencies {
-    implementation 'com.github.the-super-toys.glimpse-android:glimpse-core:0.0.1'
+    implementation 'com.github.the-super-toys.glimpse-android:glimpse-core:0.0.2'
 
     //only required for glide extensions
-    implementation 'com.github.the-super-toys.glimpse-android:glimpse-glide:0.0.1'
+    implementation 'com.github.the-super-toys.glimpse-android:glimpse-glide:0.0.2'
 
     implementation 'org.tensorflow:tensorflow-lite:0.0.0-nightly'
 }
@@ -84,6 +84,8 @@ We tried to ship Glimpse with both Picasso and Fresco extensions but we were not
 
 We opened an [issue on Picasso repository](https://github.com/square/picasso/issues/2067) and a [labeled Fresco question on Stack Overflow](https://stackoverflow.com/questions/54773198/fresco-how-to-use-scaletypes-focuscrop-based-on-bitmap-content)  asking for guidance, but sadly we did not find much support. If you know how to assemble Glimpse cropping functionality to either lib without disrupting their original pipeline, please open an issue to review together the proposal. We really want to offer support for all the popular loading image libraries!  
 
+### Java callers
+If you're using Java you can take a look at this [file](https://github.com/the-super-toys/glimpse-android/blob/master/sample-app/src/main/java/glimpse/sample/TestingApiFromJava.java) to see how Glimpse api looks for Java callers. 
 
 ## Sample app
 `:sample-app` module showcase Glimpse usage by making use of Glide extensions. The application is also published on [Google Play](https://play.google.com/store/apps/details?id=glimpse.sample). 

glimpse-core/src/main/java/glimpse/core/BitmapExtensions.kt

@@ -1,3 +1,5 @@
+@file:JvmName("BitmapUtils")
+
 package glimpse.core
 
 import android.graphics.*
@@ -6,6 +8,8 @@ import org.tensorflow.lite.Interpreter
 import kotlin.math.max
 import kotlin.math.min
 
+
+@JvmOverloads
 fun Bitmap.crop(
     centerX: Float,
     centerY: Float,
@@ -41,6 +45,7 @@ fun Bitmap.crop(
     return target
 }
 
+@JvmOverloads
 fun Bitmap.debugHeatMap(
     temperature: Float = 0.2f,
     lowerBound: Float = 0.25f
@@ -103,6 +108,7 @@ fun Bitmap.debugHeatMap(
         }
 }
 
+@JvmOverloads
 fun Bitmap.findCenter(
     temperature: Float = 0.2f,
     lowerBound: Float = 0.25f

glimpse-core/src/main/java/glimpse/core/Glimpse.kt

@@ -5,6 +5,7 @@ import android.app.Application
 object Glimpse {
     internal lateinit var client: Application
 
+    @JvmStatic
     fun init(app: Application) {
         client = app
     }

sample-app/src/main/java/glimpse/sample/TestingApiFromJava.java

@@ -0,0 +1,30 @@
+package glimpse.sample;
+
+import android.app.Application;
+import android.graphics.Bitmap;
+import glimpse.core.BitmapUtils;
+import glimpse.core.Glimpse;
+import glimpse.glide.GlimpseTransformation;
+import kotlin.Pair;
+
+public class TestingApiFromJava {
+
+    private static void howDoesItFeel() {
+        Application app = null;
+        Bitmap bitmap = null;
+
+        Glimpse.init(app);
+
+        Bitmap croppedBitmap = BitmapUtils.crop(bitmap, 0, 0, 0, 0, bitmap);
+        croppedBitmap = BitmapUtils.crop(bitmap, 0, 0, 0, 0);
+
+        Pair<Float, Float> focalPoints = BitmapUtils.findCenter(bitmap, 0, 0);
+        focalPoints = BitmapUtils.findCenter(bitmap);
+
+        Bitmap heatMap = BitmapUtils.debugHeatMap(bitmap, 0, 0);
+        heatMap = BitmapUtils.debugHeatMap(bitmap);
+
+        new GlimpseTransformation();
+    }
+
+}