Add layout util file to organize layout utilities

Author: neslihanturan

app/src/main/java/fr/free/nrw/commons/utils/LayoutUtils.java

@@ -0,0 +1,52 @@
+package fr.free.nrw.commons.utils;
+
+import android.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewTreeObserver;
+
+public class LayoutUtils {
+
+    /**
+     * Can be used for keeping aspect radios suggested by material guidelines. See:
+     * https://material.io/design/layout/spacing-methods.html#containers-aspect-ratios
+     * In some cases we don't know exact width, for such cases this method measures
+     * width and sets height by multiplying the width with height.
+     * @param rate Aspect ratios, ie 1 for 1:1. (width * rate = height)
+     * @param view view to change height
+     */
+    public static void setLayoutHeightAllignedToWidth(double rate, View view) {
+        ViewTreeObserver vto = view.getViewTreeObserver();
+        vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
+            @Override
+            public void onGlobalLayout() {
+                view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
+                ViewGroup.LayoutParams layoutParams = view.getLayoutParams();
+                Log.d("deneme7","heig:"+layoutParams.height+"weig:"+view.getWidth() * rate);
+                layoutParams.height = (int) (view.getWidth() * rate);
+                view.setLayoutParams(layoutParams);
+            }
+        });
+    }
+
+    /**
+     * Can be used for keeping aspect radios suggested by material guidelines. See:
+     * https://material.io/design/layout/spacing-methods.html#containers-aspect-ratios
+     * In some cases we don't know exact height, for such cases this method measures
+     * height and sets width by multiplying the width with height.
+     * @param rate Aspect ratios, ie 1 for 1:1. (height * rate = width)
+     * @param view view to change width
+     */
+    public static void setLayoutWidthAllignedToHeight(double rate, View view) {
+        ViewTreeObserver vto = view.getViewTreeObserver();
+        vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
+            @Override
+            public void onGlobalLayout() {
+                view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
+                ViewGroup.LayoutParams layoutParams = view.getLayoutParams();
+                layoutParams.width = (int) (view.getHeight() * rate);
+                view.setLayoutParams(layoutParams);
+            }
+        });
+    }
+}