Get rid of unnecessary int array allocation.

Bug: 64656232
Change-Id: Ifc811c3930b8052d57fa33d35b9d50f11b541c94
Test: Tested manually

src/com/android/launcher3/graphics/IconNormalizer.java

@@ -32,10 +32,8 @@ import android.graphics.drawable.Drawable;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.util.Log;
-
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.Utilities;
-
 import java.io.File;
 import java.io.FileOutputStream;
 import java.nio.ByteBuffer;
@@ -84,12 +82,12 @@ public class IconNormalizer {
     private final Rect mBounds;
     private final Matrix mMatrix;
 
-    private Paint mPaintIcon;
-    private Canvas mCanvasARGB;
+    private final Paint mPaintIcon;
+    private final Canvas mCanvasARGB;
 
-    private File mDir;
+    private final File mDir;
     private int mFileId;
-    private Random mRandom;
+    private final Random mRandom;
 
     private IconNormalizer(Context context) {
         // Use twice the icon size as maximum size to avoid scaling down twice.
@@ -122,7 +120,6 @@ public class IconNormalizer {
         mPaintMaskShapeOutline.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
 
         mMatrix = new Matrix();
-        int[] mPixels = new int[mMaxSize * mMaxSize];
         mAdaptiveIconScale = SCALE_NOT_INITIALIZED;
 
         mDir = context.getExternalFilesDir(null);
@@ -174,7 +171,8 @@ public class IconNormalizer {
 
         boolean isTrans = isTransparentBitmap(mBitmapARGB);
         if (DEBUG) {
-            final File afterFile = new File(mDir, "isShape" + mFileId + "_after_" + isTrans + ".png");
+            final File afterFile = new File(mDir,
+                    "isShape" + mFileId + "_after_" + isTrans + ".png");
             try {
                 mBitmapARGB.compress(Bitmap.CompressFormat.PNG, 100,
                         new FileOutputStream(afterFile));
@@ -210,7 +208,9 @@ public class IconNormalizer {
         float percentageDiffPixels = ((float) sum) / (mBounds.width() * mBounds.height());
         boolean transparentImage = percentageDiffPixels < PIXEL_DIFF_PERCENTAGE_THRESHOLD;
         if (DEBUG) {
-            Log.d(TAG, "Total # pixel that is different (id="+ mFileId + "):" + percentageDiffPixels + "="+ sum + "/" + mBounds.width() * mBounds.height());
+            Log.d(TAG,
+                    "Total # pixel that is different (id=" + mFileId + "):" + percentageDiffPixels
+                            + "=" + sum + "/" + mBounds.width() * mBounds.height());
         }
         return transparentImage;
     }