implemented background image caching

expanding-collection-simple-example/src/main/java/com/ramotion/expandingcollection/examples/simple/MainActivity.java

@@ -1,10 +1,16 @@
 package com.ramotion.expandingcollection.examples.simple;
 
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.graphics.Point;
+import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 import android.os.StrictMode;
 import android.support.v4.app.FragmentActivity;
 import android.os.Bundle;
+import android.util.Log;
+import android.util.TypedValue;
 import android.view.Display;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -29,6 +35,7 @@
 // Simple example of usage expanding collection library
 public class MainActivity extends FragmentActivity {
 
+    private final String TAG = "MainEx";
     private ECPagerView ecPagerView;
 
     @Override
@@ -43,6 +50,7 @@ protected void onCreate(Bundle savedInstanceState) {
         display.getSize(displaySize);
         setContentView(R.layout.activity_main);
 
+        Log.e(TAG, "Display sizes is " + displaySize.x + " to " + displaySize.y);
         // Prepare example dataset with cute penguins images
         List<ECCardData> exampleDataSet = getExampleDataSet(displaySize.x, displaySize.y);
 
@@ -98,8 +106,8 @@ public void onClick(final View v) {
 
         // Tune pager view
         ecPagerView
-                .withCardSize(500, 550)
-                .withCardExpandedHeaderHeight(450)
+                .withCardSize((int) (displaySize.x * 0.7), (int) (displaySize.y * 0.45))
+                .withCardExpandedHeaderHeight((int) (displaySize.y * 0.35))
                 .withBackgroundImageSwitcher(bgView)
                 .withPagerViewAdapter(adapter);
     }
@@ -114,47 +122,52 @@ private List<ECCardData> getExampleDataSet(int imageWidth, int imageHeight) {
         List<ECCardData> dataset = new ArrayList<>();
 
         PagerCardDataPOJO item5 = new PagerCardDataPOJO();
-        item5.setBgImageDrawable(placePenguin(imageWidth, imageHeight));
-        item5.setHeadTitle("FiftH");
+        item5.setMainBgImageDrawableResource(R.drawable.attractions);
+        item5.setHeadBgImageDrawableResource(R.drawable.attractions_head);
+        item5.setHeadTitle("Attractions");
         item5.setPersonMessage("Vae, nix!");
         item5.setPersonName("Frederich Nilson");
-        item5.setPersonPicture(placePenguin(100, 100));
+        item5.setPersonPicture(getResources().getDrawable(R.drawable.m5));
         item5.setComments(prepareCommentsArray());
         dataset.add(item5);
 
         PagerCardDataPOJO item4 = new PagerCardDataPOJO();
-        item4.setBgImageDrawable(placePenguin(imageWidth, imageHeight));
-        item4.setHeadTitle("FOurTH");
+        item4.setMainBgImageDrawableResource(R.drawable.cityscape);
+        item4.setHeadBgImageDrawableResource(R.drawable.cityscape_head);
+        item4.setHeadTitle("city Scape");
         item4.setPersonMessage("Celery can be covered with heated peanut butter.");
         item4.setPersonName("Peter Jackson");
-        item4.setPersonPicture(placePenguin(100, 100));
+        item4.setPersonPicture(getResources().getDrawable(R.drawable.f4));
         item4.setComments(prepareCommentsArray());
         dataset.add(item4);
 
         PagerCardDataPOJO item3 = new PagerCardDataPOJO();
-        item3.setBgImageDrawable(placePenguin(imageWidth, imageHeight));
-        item3.setHeadTitle("AWESOMENESS");
+        item3.setMainBgImageDrawableResource(R.drawable.cuisine);
+        item3.setHeadBgImageDrawableResource(R.drawable.cuisine_head);
+        item3.setHeadTitle("Cuisine");
         item3.setPersonMessage("Nanomachine of a clear advice, deserve the sonic shower!");
         item3.setPersonName("Fedor Bondarchuk");
-        item3.setPersonPicture(placePenguin(100, 100));
+        item3.setPersonPicture(getResources().getDrawable(R.drawable.m3));
         item3.setComments(prepareCommentsArray());
         dataset.add(item3);
 
         PagerCardDataPOJO item2 = new PagerCardDataPOJO();
-        item2.setBgImageDrawable(placePenguin(imageWidth, imageHeight));
-        item2.setHeadTitle("LANDMARK");
+        item2.setMainBgImageDrawableResource(R.drawable.nature);
+        item2.setHeadBgImageDrawableResource(R.drawable.nature_head);
+        item2.setHeadTitle("Nature");
         item2.setPersonName("James Parkinson");
         item2.setPersonMessage("Whales scream on fortune at port royal!");
         item2.setComments(prepareCommentsArray());
-        item2.setPersonPicture(placePenguin(100, 100));
+        item2.setPersonPicture(getResources().getDrawable(R.drawable.f2));
         dataset.add(item2);
 
         PagerCardDataPOJO item1 = new PagerCardDataPOJO();
-        item1.setBgImageDrawable(placePenguin(imageWidth, imageHeight));
-        item1.setHeadTitle("Cuisine");
+        item1.setMainBgImageDrawableResource(R.drawable.nightlife);
+        item1.setHeadBgImageDrawableResource(R.drawable.nightlife_head);
+        item1.setHeadTitle("Night Life");
         item1.setPersonMessage("Crescere satis ducunt ad teres terror.");
         item1.setPersonName("Peter Robinson");
-        item1.setPersonPicture(placePenguin(100, 100));
+        item1.setPersonPicture(getResources().getDrawable(R.drawable.f1));
         item1.setComments(prepareCommentsArray());
         dataset.add(item1);
 
@@ -174,10 +187,10 @@ private List<CommentPOJO> prepareCommentsArray() {
                 new CommentPOJO(getResources().getDrawable(R.drawable.m5), "David Gibson", "When the queen experiments for nowhere, all particles control reliable, cold captains.", "13 nov. 1964"));
     }
 
-    public Drawable placePenguin(int w, int h) {
+    public BitmapDrawable placePenguin(int w, int h) {
         try {
             InputStream is = (InputStream) new URL("http://placepenguin.com/" + w + "/" + h + "?" + System.currentTimeMillis()).getContent();
-            return Drawable.createFromStream(is, "place the penguin");
+            return (BitmapDrawable) BitmapDrawable.createFromStream(is, "place the penguin");
         } catch (Exception e) {
             return null;
         }

expanding-collection-simple-example/src/main/java/com/ramotion/expandingcollection/examples/simple/PagerCardDataPOJO.java

@@ -1,5 +1,6 @@
 package com.ramotion.expandingcollection.examples.simple;
 
+import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 
 import com.ramotion.expandingcollection.ECCardData;
@@ -11,8 +12,12 @@
 public class PagerCardDataPOJO implements ECCardData<CommentPOJO> {
 
     private String headTitle;
-    private Drawable headBgImageDrawable;
-    private Drawable mainBgImageDrawable;
+
+    private BitmapDrawable headBgImageDrawable;
+    private BitmapDrawable mainBgImageDrawable;
+
+    private Integer headBgImageDrawableResource;
+    private Integer mainBgImageDrawableResource;
 
     private Drawable personPicture;
     private String personName;
@@ -38,25 +43,39 @@ public void setHeadTitle(String headTitle) {
     }
 
     @Override
-    public Drawable getMainBgImageDrawable() {
+    public BitmapDrawable getHeadBgImageDrawable() {
         return headBgImageDrawable;
     }
 
+    public void setHeadBgImageDrawable(BitmapDrawable headBgImageDrawable) {
+        this.headBgImageDrawable = headBgImageDrawable;
+    }
+
     @Override
-    public Drawable getHeadBgImageDrawable() {
-        return headBgImageDrawable;
+    public BitmapDrawable getMainBgImageDrawable() {
+        return mainBgImageDrawable;
     }
 
-    public void setBgImageDrawable(Drawable bgImageDrawable) {
-        this.headBgImageDrawable = bgImageDrawable;
+    public void setMainBgImageDrawable(BitmapDrawable mainBgImageDrawable) {
+        this.mainBgImageDrawable = mainBgImageDrawable;
     }
 
-    public void setHeadBgImageDrawable(Drawable headBgImageDrawable) {
-        this.headBgImageDrawable = headBgImageDrawable;
+    @Override
+    public Integer getHeadBgImageDrawableResource() {
+        return headBgImageDrawableResource;
     }
 
-    public void setMainBgImageDrawable(Drawable mainBgImageDrawable) {
-        this.mainBgImageDrawable = mainBgImageDrawable;
+    public void setHeadBgImageDrawableResource(Integer headBgImageDrawableResource) {
+        this.headBgImageDrawableResource = headBgImageDrawableResource;
+    }
+
+    @Override
+    public Integer getMainBgImageDrawableResource() {
+        return mainBgImageDrawableResource;
+    }
+
+    public void setMainBgImageDrawableResource(Integer mainBgImageDrawableResource) {
+        this.mainBgImageDrawableResource = mainBgImageDrawableResource;
     }
 
     public Drawable getPersonPicture() {

expanding-collection/src/main/java/com/ramotion/expandingcollection/BackgroundBitmapCache.java

@@ -0,0 +1,51 @@
+package com.ramotion.expandingcollection;
+
+import android.graphics.Bitmap;
+import android.util.LruCache;
+
+public class BackgroundBitmapCache {
+
+    private final String TAG = "cache_manager";
+
+    private LruCache<Integer, Bitmap> mBackgroundsCache;
+
+    private static BackgroundBitmapCache instance;
+
+    public static BackgroundBitmapCache getInstance() {
+        if (instance == null) {
+            instance = new BackgroundBitmapCache();
+            instance.init();
+        }
+        return instance;
+    }
+
+    private void init() {
+        final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
+
+        final int cacheSize = maxMemory / 5;
+
+        mBackgroundsCache = new LruCache<Integer, Bitmap>(cacheSize) {
+            @Override
+            protected void entryRemoved(boolean evicted, Integer key, Bitmap oldValue, Bitmap newValue) {
+                super.entryRemoved(evicted, key, oldValue, newValue);
+            }
+
+            @Override
+            protected int sizeOf(Integer key, Bitmap bitmap) {
+                // The cache size will be measured in kilobytes rather than number of items.
+                return bitmap.getByteCount() / 1024;
+            }
+        };
+    }
+
+    public void addBitmapToBgMemoryCache(Integer key, Bitmap bitmap) {
+        if (getBitmapFromBgMemCache(key) == null) {
+            mBackgroundsCache.put(key, bitmap);
+        }
+    }
+
+    public Bitmap getBitmapFromBgMemCache(Integer key) {
+        return mBackgroundsCache.get(key);
+    }
+
+}

expanding-collection/src/main/java/com/ramotion/expandingcollection/BitmapFactoryOptions.java

@@ -0,0 +1,9 @@
+package com.ramotion.expandingcollection;
+
+import android.graphics.BitmapFactory;
+
+public class BitmapFactoryOptions extends BitmapFactory.Options {
+    public BitmapFactoryOptions() {
+        this.inScaled = false;
+    }
+}

expanding-collection/src/main/java/com/ramotion/expandingcollection/BitmapWorkerTask.java

@@ -0,0 +1,43 @@
+package com.ramotion.expandingcollection;
+
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.drawable.BitmapDrawable;
+import android.os.AsyncTask;
+import android.support.annotation.DrawableRes;
+
+public class BitmapWorkerTask extends AsyncTask<Integer, Void, Bitmap> {
+
+    private final Resources mResources;
+    private final BackgroundBitmapCache cache;
+    private final BitmapDrawable mProvidedBitmap;
+    @DrawableRes
+    private final int mProvidedBitmapResId;
+
+    public BitmapWorkerTask(Resources resources, BitmapDrawable providedBitmap, @DrawableRes int providedBitmapResId) {
+        this.mResources = resources;
+        this.cache = BackgroundBitmapCache.getInstance();
+        this.mProvidedBitmap = providedBitmap;
+        this.mProvidedBitmapResId = providedBitmapResId;
+    }
+
+    @Override
+    protected Bitmap doInBackground(Integer... params) {
+        Integer key = params[0];
+
+        if (mProvidedBitmap != null && !mProvidedBitmap.getBitmap().isRecycled()) {
+            cache.addBitmapToBgMemoryCache(key, mProvidedBitmap.getBitmap());
+            return mProvidedBitmap.getBitmap();
+        } else {
+            Bitmap cachedBitmap = cache.getBitmapFromBgMemCache(key);
+            if (cachedBitmap == null) {
+                cachedBitmap = BitmapFactory.decodeResource(mResources, mProvidedBitmapResId, new BitmapFactoryOptions());
+                cache.addBitmapToBgMemoryCache(key, cachedBitmap);
+            }
+            return cachedBitmap;
+        }
+    }
+
+
+}