[Persisting images into disk] : Added logic to enable perisiting downloaded images to disk

Author: crypticminds

README.md

@@ -75,11 +75,15 @@ You can annotate any ImageView present in an Activity , fragement or another vie
 @LoadImage(
         R.id.image_1,
         "https://images.unsplash.com/photo-1549740425-5e9ed4d8cd34?ixlib=rb-1.2.1&w=1000&q=80",
-        placeHolder = R.drawable.loading, enableLoadingAnimation = true
+        placeHolder = R.drawable.loading, enableLoadingAnimation = true, persistImageToDisk = true
     )
     lateinit var imageWithAnimation: ImageView
 ```
 
+Images can be persisted into the internal storage using the "persistImageToDisk" parameter. By default images are not persisted.
+You can specify how long images should be persisted in the disk by passing "timeToLiveForDiskStorage" to the Cache.initialize method.
+By default all data is kept in the disk for upto 2 days.
+
 ### Parameters 
 
 * imageViewResourceId  : The resource id of the image view (Eg R.id.imageView1)

app/src/main/java/com/arcane/coldstorage/MainActivity.kt

@@ -15,7 +15,7 @@ import com.arcane.coldstoragecache.callback.OnValueFetchedCallback
 import com.squareup.picasso.Picasso
 
 /**
- * The mainactivity for the example app.
+ * The main activity for the example app.
  * This shows the example of @LoadImage annotation.
  *
  * @author Anurag
@@ -39,9 +39,10 @@ class MainActivity : AppCompatActivity(), OnValueFetchedCallback<Bitmap?> {
 
     @LoadImage(
         R.id.image_view_2,
-        "https://www.ddfl.org/wp-content/uploads/2018/03/bunnies-easter.png",
+        "https://images.unsplash.com/photo-1485550409059-9afb054cada4?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&w=1000&q=80",
         R.drawable.test_load,
-        enableLoadingAnimation = true
+        enableLoadingAnimation = true,
+        persistImageToDisk = true
     )
     lateinit var imageView2: ImageView
 

coldstorageannotation/src/main/java/com/arcane/coldstorageannotation/LoadImage.kt

@@ -17,11 +17,13 @@ package com.arcane.coldstorageannotation
  * background and enabling the animation will rotate the image which will give the impression
  * of a circular progress bar.
  *
+ * @param persistImageToDisk Boolean representing whether the images will be persisted in the disk
+ * or not.
+ *
  * TODO : Change height , width of the image
  *
  * TODO : Accept custom animation classes.
  *
- * TODO : Accept boolean to decide whether to store the image to disk for future use.
  *
  * @author Anurag
  */
@@ -35,7 +37,9 @@ annotation class LoadImage(
 
     val placeHolder: Int = -1,
 
-    val enableLoadingAnimation: Boolean = false
+    val enableLoadingAnimation: Boolean = false,
+
+    val persistImageToDisk: Boolean = false
 
 )