Enlarge wifi signal icon from 24dp to 32dp for header view

Bug: 129413562
Test: manual test
Change-Id: I50a27ac25e5ae42530736bb7c019485a51d707ba

res/values/dimens.xml

@@ -176,6 +176,7 @@
     <!-- WiFi Preferences -->
     <dimen name="wifi_divider_height">1px</dimen>
     <dimen name="wifi_ap_band_checkbox_padding">16dp</dimen>
+    <dimen name="wifi_detail_page_header_image_size">32dp</dimen>
 
     <!-- Color picker -->
     <dimen name="color_swatch_size">16dp</dimen>

src/com/android/settings/Utils.java

@@ -977,7 +977,10 @@ public final class Utils extends com.android.settingslib.Utils {
         return IconCompat.createWithBitmap(bitmap);
     }
 
-    private static Bitmap createBitmap(Drawable drawable, int width, int height) {
+    /**
+     * Creates a drawable with specified width and height.
+     */
+    public static Bitmap createBitmap(Drawable drawable, int width, int height) {
         final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
         final Canvas canvas = new Canvas(bitmap);
         drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());

src/com/android/settings/wifi/details/WifiDetailPreferenceController.java

@@ -27,7 +27,10 @@ import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.graphics.Bitmap;
+import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
+import android.graphics.drawable.VectorDrawable;
 import android.net.ConnectivityManager;
 import android.net.ConnectivityManager.NetworkCallback;
 import android.net.LinkAddress;
@@ -595,7 +598,8 @@ public class WifiDetailPreferenceController extends AbstractPreferenceController
 
         wifiIcon.setTintList(Utils.getColorAccent(mContext));
         if (mEntityHeaderController != null) {
-            mEntityHeaderController.setIcon(wifiIcon).done(mFragment.getActivity(),
+            mEntityHeaderController
+                    .setIcon(rescaleIconForHeader(wifiIcon)).done(mFragment.getActivity(),
                             true /* rebind */);
         }
 
@@ -607,6 +611,23 @@ public class WifiDetailPreferenceController extends AbstractPreferenceController
         mSignalStrengthPref.setVisible(true);
     }
 
+    private Drawable rescaleIconForHeader(Drawable original) {
+        final int iconSize = mContext.getResources().getDimensionPixelSize(
+                R.dimen.wifi_detail_page_header_image_size);
+        final int actualWidth = original.getMinimumWidth();
+        final int actualHeight = original.getMinimumHeight();
+
+        if ((actualWidth == iconSize && actualHeight == iconSize)
+                || !VectorDrawable.class.isInstance(original)) {
+            return original;
+        }
+
+        final Bitmap bitmap = Utils.createBitmap(original,
+                iconSize /*width*/,
+                iconSize /*height*/);
+        return new BitmapDrawable(null /*resource*/, bitmap);
+    }
+
     private void refreshFrequency() {
         if (mWifiInfo == null) {
             mFrequencyPref.setVisible(false);