Refactor shortcut updating, and do it on BOOT_COMPLETE

This CL shuffles quite a bit of code around, but the effective differences are:
* Unified shortcut updating code (language switch & backup restoration).
* Shortcuts are also updated on boot (flagged by MODES_UI which will need this).
* Removed usage of (long obsolete) AsyncTask.

A further CL will add some special-casing for the DND->Modes shortcut transition.

Bug: 365545604
Test: atest com.android.settings.shortcut + manual (switch language, reboot)
Flag: android.app.modes_ui
Change-Id: I30450d13cb05008d2a71ed89d4781eb81e5532b9

src/com/android/settings/shortcut/Shortcuts.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.shortcut;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ActivityInfo;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.pm.ShortcutInfo;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.Icon;
+import android.graphics.drawable.LayerDrawable;
+import android.util.Log;
+import android.view.ContextThemeWrapper;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.ImageView;
+
+import com.android.settings.R;
+import com.android.settings.activityembedding.ActivityEmbeddingUtils;
+
+class Shortcuts {
+
+    private static final String TAG = "Shortcuts";
+
+    static final String SHORTCUT_ID_PREFIX = "component-shortcut-";
+    static final Intent SHORTCUT_PROBE = new Intent(Intent.ACTION_MAIN)
+            .addCategory("com.android.settings.SHORTCUT")
+            .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+    static ShortcutInfo createShortcutInfo(Context context, ResolveInfo target) {
+        checkArgument(target.activityInfo != null);
+        String shortcutId = SHORTCUT_ID_PREFIX
+                + target.activityInfo.getComponentName().flattenToShortString();
+
+        return createShortcutInfo(context, shortcutId, target);
+    }
+
+    static ShortcutInfo createShortcutInfo(Context context, String id, ResolveInfo target) {
+        Intent intent = new Intent(SHORTCUT_PROBE)
+                .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP)
+                .setClassName(target.activityInfo.packageName, target.activityInfo.name);
+        if (ActivityEmbeddingUtils.isEmbeddingActivityEnabled(context)) {
+            intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
+        }
+
+        CharSequence label = target.loadLabel(context.getPackageManager());
+        Icon maskableIcon = getMaskableIcon(context, target.activityInfo);
+
+        return new ShortcutInfo.Builder(context, id)
+                .setIntent(intent)
+                .setShortLabel(label)
+                .setIcon(maskableIcon)
+                .build();
+    }
+
+    private static Icon getMaskableIcon(Context context, ActivityInfo activityInfo) {
+        if (activityInfo.icon != 0 && activityInfo.applicationInfo != null) {
+            return Icon.createWithAdaptiveBitmap(createIcon(
+                    context,
+                    activityInfo.applicationInfo, activityInfo.icon,
+                    R.layout.shortcut_badge_maskable,
+                    context.getResources().getDimensionPixelSize(R.dimen.shortcut_size_maskable)));
+        } else {
+            return Icon.createWithResource(context, R.drawable.ic_launcher_settings);
+        }
+    }
+
+    static Bitmap createIcon(Context context, ApplicationInfo app, int resource, int layoutRes,
+            int size) {
+        final Context themedContext = new ContextThemeWrapper(context,
+                android.R.style.Theme_Material);
+        final View view = LayoutInflater.from(themedContext).inflate(layoutRes, null);
+        final int spec = View.MeasureSpec.makeMeasureSpec(size, View.MeasureSpec.EXACTLY);
+        view.measure(spec, spec);
+        final Bitmap bitmap = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(),
+                Bitmap.Config.ARGB_8888);
+        final Canvas canvas = new Canvas(bitmap);
+
+        Drawable iconDrawable;
+        try {
+            iconDrawable = context.getPackageManager().getResourcesForApplication(app)
+                    .getDrawable(resource, themedContext.getTheme());
+            if (iconDrawable instanceof LayerDrawable) {
+                iconDrawable = ((LayerDrawable) iconDrawable).getDrawable(1);
+            }
+            ((ImageView) view.findViewById(android.R.id.icon)).setImageDrawable(iconDrawable);
+        } catch (PackageManager.NameNotFoundException e) {
+            Log.w(TAG, "Cannot load icon from app " + app + ", returning a default icon");
+            Icon icon = Icon.createWithResource(context, R.drawable.ic_launcher_settings);
+            ((ImageView) view.findViewById(android.R.id.icon)).setImageIcon(icon);
+        }
+
+        view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
+        view.draw(canvas);
+        return bitmap;
+    }
+}