Add a Builder to to creat a dynamic FooterPreference easily

Fixes: 139163212
Test: compilation
Change-Id: I09c455770d1de5b30cfba55fbd9f23c95fef39cd

packages/SettingsLib/src/com/android/settingslib/widget/FooterPreference.java

@@ -16,12 +16,14 @@
 
 package com.android.settingslib.widget;
 
+import android.annotation.StringRes;
 import android.content.Context;
 import android.text.TextUtils;
 import android.text.method.LinkMovementMethod;
 import android.util.AttributeSet;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
 import androidx.core.content.res.TypedArrayUtils;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceViewHolder;
@@ -80,4 +82,59 @@ public class FooterPreference extends Preference {
             setKey(KEY_FOOTER);
         }
     }
+
+    /**
+     * The builder is convenient to creat a dynamic FooterPreference.
+     */
+    public static class Builder {
+        private Context mContext;
+        private String mKey;
+        private CharSequence mTitle;
+
+        public Builder(@NonNull Context context) {
+            mContext = context;
+        }
+
+        /**
+         * To set the key value of the {@link FooterPreference}.
+         * @param key The key value.
+         */
+        public Builder setKey(String key) {
+            mKey = key;
+            return this;
+        }
+
+        /**
+         * To set the title of the {@link FooterPreference}.
+         * @param title The title.
+         */
+        public Builder setTitle(CharSequence title) {
+            mTitle = title;
+            return this;
+        }
+
+        /**
+         * To set the title of the {@link FooterPreference}.
+         * @param titleResId The resource id of the title.
+         */
+        public Builder setTitle(@StringRes int titleResId) {
+            mTitle = mContext.getText(titleResId);
+            return this;
+        }
+
+        /**
+         * To generate the {@link FooterPreference}.
+         */
+        public FooterPreference build() {
+            final FooterPreference footerPreference = new FooterPreference(mContext);
+            footerPreference.setSelectable(false);
+            if (!TextUtils.isEmpty(mKey)) {
+                footerPreference.setKey(mKey);
+            }
+            if (!TextUtils.isEmpty(mTitle)) {
+                footerPreference.setTitle(mTitle);
+            }
+            return footerPreference;
+        }
+    }
 }