Decrease memory usage

Fixes #22

app/src/main/java/fr/mobdev/goblim/activity/HistoryActivity.java

@@ -22,6 +22,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.graphics.Typeface;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.design.widget.FloatingActionButton;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
@@ -50,7 +51,7 @@ import fr.mobdev.goblim.R;
  */
 public class HistoryActivity extends AppCompatActivity {
 
-    private List<Img> images;
+    private List<Long> imagesIdx;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -78,9 +79,9 @@ public class HistoryActivity extends AppCompatActivity {
             @Override
             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                 Intent linkIntent = new Intent(HistoryActivity.this,LinkActivity.class);
-                if(position < images.size()) {
-                    Img image = images.get(position);
-                    linkIntent.putExtra("imageId", image.getId());
+                if(position < imagesIdx.size()) {
+                    Long img = imagesIdx.get(position);
+                    linkIntent.putExtra("imageId", img);
                     startActivity(linkIntent);
                 }
             }
@@ -99,7 +100,12 @@ public class HistoryActivity extends AppCompatActivity {
     {
         ListView historyList = (ListView) findViewById(R.id.history_list);
 
-        images = Database.getInstance(getApplicationContext()).getHistory();
+        List<Img> images = Database.getInstance(getApplicationContext()).getHistory();
+        if(imagesIdx == null)
+            imagesIdx = new ArrayList<>();
+        imagesIdx.clear();
+        for(Img img : images)
+            imagesIdx.add(img.getId());
         HistoryAdapter adapter = new HistoryAdapter(this,R.layout.history_item,R.id.url_history_item,images);
         historyList.setAdapter(adapter);
     }
@@ -112,15 +118,16 @@ public class HistoryActivity extends AppCompatActivity {
         private LayoutInflater mInflater;
         int resource;
 
-        public HistoryAdapter(Context context, int resource, int textViewResourceId, List<Img> objects) {
+        HistoryAdapter(Context context, int resource, int textViewResourceId, List<Img> objects) {
             super(context, resource, textViewResourceId, objects);
             images = new ArrayList<>(objects);
             this.resource = resource;
             mInflater = LayoutInflater.from(context);
         }
 
+        @NonNull
         @Override
-        public View getView(int position, View convertView, ViewGroup parent)
+        public View getView(int position, View convertView, @NonNull ViewGroup parent)
         {
             Img image = images.get(position);
             //reuse view or create a new one?

app/src/main/java/fr/mobdev/goblim/objects/Img.java

@@ -31,7 +31,6 @@ public class Img {
     private Calendar date;
     private int storageDuration;
     private byte[] thumb;
-    private Bitmap image;
     private String shortHash;
     private String realShortHash;
     private String token;
@@ -46,9 +45,6 @@ public class Img {
         this.storageDuration = storageDuration;
         this.token = token;
         thumb = thumbData;
-        if(thumb != null) {
-            image = BitmapFactory.decodeByteArray(thumb, 0, thumb.length);
-        }
     }
 
     public Long getId()
@@ -68,6 +64,10 @@ public class Img {
 
     public Bitmap getThumb()
     {
+        Bitmap image = null;
+        if(thumb != null) {
+            image = BitmapFactory.decodeByteArray(thumb, 0, thumb.length);
+        }
         return image;
     }
 
@@ -99,5 +99,4 @@ public class Img {
         return token;
     }
 
-
 }