Started moving to ZoomUtils.java

app/src/main/java/fr/free/nrw/commons/upload/ZoomUtils.java

@@ -0,0 +1,96 @@
+package fr.free.nrw.commons.upload;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapRegionDecoder;
+import android.graphics.Rect;
+import android.provider.MediaStore;
+import android.support.v4.graphics.BitmapCompat;
+import android.view.View;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class ZoomUtils {
+
+    static void zoomImageUtil(View thumbView, Rect startBounds, InputStream input) {
+
+        Bitmap scaled = null;
+        BitmapRegionDecoder decoder = null;
+        try {
+            decoder = BitmapRegionDecoder.newInstance(input, false);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        Bitmap bitmap = decoder.decodeRegion(new Rect(10, 10, 50, 50), null);
+        try {
+            //Compress the Image
+            System.gc();
+            Runtime rt = Runtime.getRuntime();
+            long maxMemory = rt.freeMemory();
+            bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageuri);
+            int bitmapByteCount= BitmapCompat.getAllocationByteCount(bitmap);
+            long height = bitmap.getHeight();
+            long width = bitmap.getWidth();
+            long calHeight = (long) ((height * maxMemory)/(bitmapByteCount * 1.1));
+            long calWidth = (long) ((width * maxMemory)/(bitmapByteCount * 1.1));
+            scaled = Bitmap.createScaledBitmap(bitmap,(int) Math.min(width,calWidth), (int) Math.min(height,calHeight), true);
+        } catch (IOException e) {
+        } catch (NullPointerException e){
+            scaled = bitmap;
+        }
+        // Load the high-resolution "zoomed-in" image.
+        expandedImageView.setImageBitmap(scaled);
+
+
+
+        // Calculate the starting and ending bounds for the zoomed-in image.
+        // This step involves lots of math. Yay, math.
+        // The start bounds are the global visible rectangle of the thumbnail,
+        // and the final bounds are the global visible rectangle of the container
+        // view. Also set the container view's offset as the origin for the
+        // bounds, since that's the origin for the positioning animation
+        // properties (X, Y).
+        thumbView.getGlobalVisibleRect(startBounds);
+        flContainer.getGlobalVisibleRect(finalBounds, globalOffset);
+        startBounds.offset(-globalOffset.x, -globalOffset.y);
+        finalBounds.offset(-globalOffset.x, -globalOffset.y);
+
+        // Adjust the start bounds to be the same aspect ratio as the final
+        // bounds using the "center crop" technique. This prevents undesirable
+        // stretching during the animation. Also calculate the start scaling
+        // factor (the end scaling factor is always 1.0).
+        float startScale;
+        if ((float) finalBounds.width() / finalBounds.height()
+                > (float) startBounds.width() / startBounds.height()) {
+            // Extend start bounds horizontally
+            startScale = (float) startBounds.height() / finalBounds.height();
+            float startWidth = startScale * finalBounds.width();
+            float deltaWidth = (startWidth - startBounds.width()) / 2;
+            startBounds.left -= deltaWidth;
+            startBounds.right += deltaWidth;
+        } else {
+            // Extend start bounds vertically
+            startScale = (float) startBounds.width() / finalBounds.width();
+            float startHeight = startScale * finalBounds.height();
+            float deltaHeight = (startHeight - startBounds.height()) / 2;
+            startBounds.top -= deltaHeight;
+            startBounds.bottom += deltaHeight;
+        }
+
+        // Hide the thumbnail and show the zoomed-in view. When the animation
+        // begins, it will position the zoomed-in view in the place of the
+        // thumbnail.
+        thumbView.setAlpha(0f);
+        expandedImageView.setVisibility(View.VISIBLE);
+        zoomOutButton.setVisibility(View.VISIBLE);
+        zoomInButton.setVisibility(View.GONE);
+
+        // Set the pivot point for SCALE_X and SCALE_Y transformations
+        // to the top-left corner of the zoomed-in view (the default
+        // is the center of the view).
+        expandedImageView.setPivotX(0f);
+        expandedImageView.setPivotY(0f);
+
+    }
+}