diff --git a/app/src/main/java/com/hippo/ehviewer/client/data/ListUrlBuilder.kt b/app/src/main/java/com/hippo/ehviewer/client/data/ListUrlBuilder.kt
index 02d25b288..646cd7a6d 100644
--- a/app/src/main/java/com/hippo/ehviewer/client/data/ListUrlBuilder.kt
+++ b/app/src/main/java/com/hippo/ehviewer/client/data/ListUrlBuilder.kt
@@ -23,7 +23,7 @@ import com.hippo.ehviewer.dao.QuickSearch
 import com.hippo.ehviewer.network.UrlBuilder
 import com.hippo.ehviewer.ui.legacy.AdvanceSearchTable
 import com.hippo.ehviewer.util.encodeUTF8
-import com.hippo.ehviewer.yorozuya.NumberUtils
+import com.hippo.ehviewer.yorozuya.toIntOrDefault
 import kotlinx.parcelize.Parcelize
 import java.io.UnsupportedEncodingException
 import java.net.URLDecoder
@@ -158,7 +158,7 @@ data class ListUrlBuilder(
             val value = str.substring(index + 1)
             when (key) {
                 "f_cats" -> {
-                    val cats = NumberUtils.parseIntSafely(value, EhUtils.ALL_CATEGORY)
+                    val cats = value.toIntOrDefault(EhUtils.ALL_CATEGORY)
                     category = category or (cats.inv() and EhUtils.ALL_CATEGORY)
                 }
 
@@ -237,13 +237,13 @@ data class ListUrlBuilder(
                     enableMinRating = true
                 }
 
-                "f_srdd" -> minRating = NumberUtils.parseIntSafely(value, -1)
+                "f_srdd" -> minRating = value.toIntOrDefault(-1)
                 "f_sp" -> if ("on" == value) {
                     enablePage = true
                 }
 
-                "f_spf" -> pageFrom = NumberUtils.parseIntSafely(value, -1)
-                "f_spt" -> pageTo = NumberUtils.parseIntSafely(value, -1)
+                "f_spf" -> pageFrom = value.toIntOrDefault(-1)
+                "f_spt" -> pageTo = value.toIntOrDefault(-1)
                 "f_shash" -> hash = value
             }
         }
diff --git a/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryApiParser.kt b/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryApiParser.kt
index 103369d58..abbc8562f 100644
--- a/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryApiParser.kt
+++ b/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryApiParser.kt
@@ -19,7 +19,8 @@ import com.hippo.ehviewer.client.EhUtils.getCategory
 import com.hippo.ehviewer.client.EhUtils.handleThumbUrlResolution
 import com.hippo.ehviewer.client.data.GalleryInfo
 import com.hippo.ehviewer.client.getThumbKey
-import com.hippo.ehviewer.yorozuya.NumberUtils
+import com.hippo.ehviewer.yorozuya.toFloatOrDefault
+import com.hippo.ehviewer.yorozuya.toIntOrDefault
 import org.json.JSONObject
 
 object GalleryApiParser {
@@ -37,11 +38,12 @@ object GalleryApiParser {
             gi.uploader = g.getString("uploader")
             gi.posted =
                 ParserUtils.formatDate(ParserUtils.parseLong(g.getString("posted"), 0) * 1000)
-            gi.rating = NumberUtils.parseFloatSafely(g.getString("rating"), 0.0f)
+            gi.rating = g.getString("rating").toFloatOrDefault(0.0f)
             // tags
             val tagJa = g.getJSONArray("tags")
-            gi.simpleTags = (0 until tagJa.length()).map { tagJa.getString(it) }.let { arrayListOf<String>().apply { addAll(it) } }
-            gi.pages = NumberUtils.parseIntSafely(g.getString("filecount"), 0)
+            gi.simpleTags = (0 until tagJa.length()).map { tagJa.getString(it) }
+                .let { arrayListOf<String>().apply { addAll(it) } }
+            gi.pages = g.getString("filecount").toIntOrDefault(0)
             gi.generateSLang()
         }
     }
diff --git a/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryDetailParser.kt b/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryDetailParser.kt
index fef2b43e1..85c3ed540 100644
--- a/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryDetailParser.kt
+++ b/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryDetailParser.kt
@@ -35,7 +35,8 @@ import com.hippo.ehviewer.client.exception.ParseException
 import com.hippo.ehviewer.client.exception.PiningException
 import com.hippo.ehviewer.client.getThumbKey
 import com.hippo.ehviewer.util.ExceptionUtils
-import com.hippo.ehviewer.yorozuya.NumberUtils
+import com.hippo.ehviewer.yorozuya.toFloatOrDefault
+import com.hippo.ehviewer.yorozuya.toIntOrDefault
 import com.hippo.ehviewer.yorozuya.trimAnd
 import com.hippo.ehviewer.yorozuya.unescapeXml
 import org.jsoup.Jsoup
@@ -174,10 +175,7 @@ object GalleryDetailParser {
             // Rating count
             val ratingCount = gm.getElementById("rating_count")
             if (null != ratingCount) {
-                gd.ratingCount = NumberUtils.parseIntSafely(
-                    ratingCount.text().trim(),
-                    0,
-                )
+                gd.ratingCount = ratingCount.text().trim().toIntOrDefault(0)
             } else {
                 gd.ratingCount = 0
             }
@@ -193,7 +191,7 @@ object GalleryDetailParser {
                     if (index == -1 || index >= ratingStr.length) {
                         gd.rating = 0f
                     } else {
-                        gd.rating = NumberUtils.parseFloatSafely(ratingStr.substring(index + 1), 0f)
+                        gd.rating = ratingStr.substring(index + 1).toFloatOrDefault(0f)
                     }
                 }
             } else {
@@ -263,7 +261,7 @@ object GalleryDetailParser {
         } else if (key.startsWith("Length")) {
             val index = value.indexOf(' ')
             if (index >= 0) {
-                gd.pages = NumberUtils.parseIntSafely(value.substring(0, index), 1)
+                gd.pages = value.substring(0, index).toIntOrDefault(1)
             } else {
                 gd.pages = 1
             }
@@ -276,7 +274,7 @@ object GalleryDetailParser {
                     if (index == -1) {
                         gd.favoriteCount = 0
                     } else {
-                        gd.favoriteCount = NumberUtils.parseIntSafely(value.substring(0, index), 0)
+                        gd.favoriteCount = value.substring(0, index).toIntOrDefault(0)
                     }
                 }
             }
@@ -375,10 +373,7 @@ object GalleryDetailParser {
             if (null != c5) {
                 val es = c5.children()
                 if (!es.isEmpty()) {
-                    comment.score = NumberUtils.parseIntSafely(
-                        es[0].text().trim(),
-                        0,
-                    )
+                    comment.score = es[0].text().trim().toIntOrDefault(0)
                 }
             }
             // time
diff --git a/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryDetailUrlParser.kt b/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryDetailUrlParser.kt
index 27de2dd26..4220776a0 100644
--- a/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryDetailUrlParser.kt
+++ b/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryDetailUrlParser.kt
@@ -16,7 +16,7 @@
 package com.hippo.ehviewer.client.parser
 
 import com.hippo.ehviewer.client.EhUrl
-import com.hippo.ehviewer.yorozuya.NumberUtils
+import com.hippo.ehviewer.yorozuya.toLongOrDefault
 import java.util.regex.Pattern
 
 /**
@@ -33,7 +33,7 @@ object GalleryDetailUrlParser {
         val pattern = if (strict) URL_STRICT_PATTERN else URL_PATTERN
         val m = pattern.matcher(url)
         return if (m.find()) {
-            val gid = NumberUtils.parseLongSafely(m.group(1), 0).takeIf { it > 0 }
+            val gid = m.group(1)!!.toLongOrDefault(0).takeIf { it > 0 }
             gid?.let { Result(it, m.group(2)!!) }
         } else {
             null
diff --git a/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryListParser.kt b/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryListParser.kt
index 66b1fa473..98c136724 100644
--- a/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryListParser.kt
+++ b/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryListParser.kt
@@ -21,7 +21,7 @@ import com.hippo.ehviewer.R
 import com.hippo.ehviewer.client.data.GalleryInfo
 import com.hippo.ehviewer.client.exception.ParseException
 import com.hippo.ehviewer.util.ExceptionUtils
-import com.hippo.ehviewer.yorozuya.NumberUtils
+import com.hippo.ehviewer.yorozuya.toIntOrDefault
 import org.jsoup.Jsoup
 import org.jsoup.nodes.Document
 import splitties.init.appCtx
@@ -71,7 +71,7 @@ object GalleryListParser {
                         val href = e.attr("href")
                         val matcher = PATTERN_NEXT_PAGE.matcher(href)
                         if (matcher.find()) {
-                            result.nextPage = NumberUtils.parseIntSafely(matcher.group(1), 0)
+                            result.nextPage = matcher.group(1)!!.toIntOrDefault(0)
                         }
                     }
                 }
diff --git a/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryPageUrlParser.kt b/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryPageUrlParser.kt
index ab71d5e02..451188dd9 100644
--- a/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryPageUrlParser.kt
+++ b/app/src/main/java/com/hippo/ehviewer/client/parser/GalleryPageUrlParser.kt
@@ -16,7 +16,8 @@
 package com.hippo.ehviewer.client.parser
 
 import com.hippo.ehviewer.client.EhUrl
-import com.hippo.ehviewer.yorozuya.NumberUtils
+import com.hippo.ehviewer.yorozuya.toIntOrDefault
+import com.hippo.ehviewer.yorozuya.toLongOrDefault
 import java.util.regex.Pattern
 
 /**
@@ -33,9 +34,9 @@ object GalleryPageUrlParser {
         val pattern = if (strict) URL_STRICT_PATTERN else URL_PATTERN
         val m = pattern.matcher(url)
         return if (m.find()) {
-            val gid = NumberUtils.parseLongSafely(m.group(2), -1L)
+            val gid = m.group(2)!!.toLongOrDefault(-1L)
             val pToken = m.group(1)!!
-            val page = NumberUtils.parseIntSafely(m.group(3), 0) - 1
+            val page = m.group(3)!!.toIntOrDefault(0) - 1
             if (gid < 0 || page < 0) {
                 null
             } else {
diff --git a/app/src/main/java/com/hippo/ehviewer/client/parser/ParserUtils.kt b/app/src/main/java/com/hippo/ehviewer/client/parser/ParserUtils.kt
index f482df9d4..923e190c1 100644
--- a/app/src/main/java/com/hippo/ehviewer/client/parser/ParserUtils.kt
+++ b/app/src/main/java/com/hippo/ehviewer/client/parser/ParserUtils.kt
@@ -15,7 +15,8 @@
  */
 package com.hippo.ehviewer.client.parser
 
-import com.hippo.ehviewer.yorozuya.NumberUtils
+import com.hippo.ehviewer.yorozuya.toIntOrDefault
+import com.hippo.ehviewer.yorozuya.toLongOrDefault
 import com.hippo.ehviewer.yorozuya.unescapeXml
 import java.time.Instant
 import java.time.ZoneOffset
@@ -36,10 +37,10 @@ object ParserUtils {
     }
 
     fun parseInt(str: String?, defValue: Int): Int {
-        return NumberUtils.parseIntSafely(trim(str).replace(",", ""), defValue)
+        return trim(str).replace(",", "").toIntOrDefault(defValue)
     }
 
     fun parseLong(str: String?, defValue: Long): Long {
-        return NumberUtils.parseLongSafely(trim(str).replace(",", ""), defValue)
+        return trim(str).replace(",", "").toLongOrDefault(defValue)
     }
 }
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/legacy/AdvanceSearchTable.kt b/app/src/main/java/com/hippo/ehviewer/ui/legacy/AdvanceSearchTable.kt
index 9db802ae5..9c0e3386d 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/legacy/AdvanceSearchTable.kt
+++ b/app/src/main/java/com/hippo/ehviewer/ui/legacy/AdvanceSearchTable.kt
@@ -28,7 +28,7 @@ import android.widget.LinearLayout
 import android.widget.TextView
 import com.google.android.material.textfield.TextInputLayout
 import com.hippo.ehviewer.R
-import com.hippo.ehviewer.yorozuya.NumberUtils
+import com.hippo.ehviewer.yorozuya.toIntOrDefault
 
 class AdvanceSearchTable @JvmOverloads constructor(
     context: Context,
@@ -90,11 +90,11 @@ class AdvanceSearchTable @JvmOverloads constructor(
             return advanceSearch
         }
         set(advanceSearch) {
-            mSh.isChecked = NumberUtils.int2boolean(advanceSearch and SH)
-            mSto.isChecked = NumberUtils.int2boolean(advanceSearch and STO)
-            mSfl.isChecked = NumberUtils.int2boolean(advanceSearch and SFL)
-            mSfu.isChecked = NumberUtils.int2boolean(advanceSearch and SFU)
-            mSft.isChecked = NumberUtils.int2boolean(advanceSearch and SFT)
+            mSh.isChecked = advanceSearch and SH != 0
+            mSto.isChecked = advanceSearch and STO != 0
+            mSfl.isChecked = advanceSearch and SFL != 0
+            mSfu.isChecked = advanceSearch and SFU != 0
+            mSft.isChecked = advanceSearch and SFT != 0
         }
     var minRating: Int
         get() {
@@ -113,7 +113,7 @@ class AdvanceSearchTable @JvmOverloads constructor(
         }
     var pageFrom: Int
         get() = if (mSp.isChecked) {
-            NumberUtils.parseIntSafely(mSpf.text.toString(), -1)
+            mSpf.text.toString().toIntOrDefault(-1)
         } else {
             -1
         }
@@ -128,7 +128,7 @@ class AdvanceSearchTable @JvmOverloads constructor(
         }
     var pageTo: Int
         get() = if (mSp.isChecked) {
-            NumberUtils.parseIntSafely(mSpt.text.toString(), -1)
+            mSpt.text.toString().toIntOrDefault(-1)
         } else {
             -1
         }
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/legacy/EasyRecyclerView.kt b/app/src/main/java/com/hippo/ehviewer/ui/legacy/EasyRecyclerView.kt
index e2a040369..3cb6e1c49 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/legacy/EasyRecyclerView.kt
+++ b/app/src/main/java/com/hippo/ehviewer/ui/legacy/EasyRecyclerView.kt
@@ -28,8 +28,6 @@ import android.widget.Checkable
 import androidx.collection.LongSparseArray
 import androidx.core.os.ParcelCompat.readParcelable
 import androidx.recyclerview.widget.RecyclerView
-import com.hippo.ehviewer.yorozuya.NumberUtils.boolean2int
-import com.hippo.ehviewer.yorozuya.NumberUtils.int2boolean
 
 /**
  * Add setChoiceMode for RecyclerView
@@ -513,7 +511,7 @@ open class EasyRecyclerView : RecyclerView {
                 readParcelable(`in`, RecyclerView::class.java.classLoader, Parcelable::class.java)
             this.superState = superState ?: EMPTY_STATE
             choiceMode = `in`.readInt()
-            customChoice = int2boolean(`in`.readInt())
+            customChoice = `in`.readInt() != 0
             checkedItemCount = `in`.readInt()
             checkState = `in`.readSparseBooleanArray()
             val n = `in`.readInt()
@@ -534,7 +532,7 @@ open class EasyRecyclerView : RecyclerView {
         override fun writeToParcel(out: Parcel, flags: Int) {
             out.writeParcelable(superState, flags)
             out.writeInt(choiceMode)
-            out.writeInt(boolean2int(customChoice))
+            out.writeInt(customChoice.compareTo(false))
             out.writeInt(checkedItemCount)
             out.writeSparseBooleanArray(checkState)
             val n = if (checkIdState != null) checkIdState!!.size() else 0
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/legacy/SearchLayout.kt b/app/src/main/java/com/hippo/ehviewer/ui/legacy/SearchLayout.kt
index 2367804ac..8a277204a 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/legacy/SearchLayout.kt
+++ b/app/src/main/java/com/hippo/ehviewer/ui/legacy/SearchLayout.kt
@@ -42,7 +42,6 @@ import com.hippo.ehviewer.client.exception.EhException
 import com.hippo.ehviewer.databinding.SearchAdvanceBinding
 import com.hippo.ehviewer.databinding.SearchCategoryBinding
 import com.hippo.ehviewer.databinding.SearchNormalBinding
-import com.hippo.ehviewer.yorozuya.NumberUtils
 import com.hippo.ehviewer.yorozuya.ViewUtils
 
 @SuppressLint("InflateParams")
@@ -97,7 +96,7 @@ class SearchLayout @JvmOverloads constructor(
             mChip.isCheckable = true
             mChip.setText(mPair.second)
             mChip.idt = mPair.first
-            mChip.isChecked = NumberUtils.int2boolean(mPair.first and mCategoryStored)
+            mChip.isChecked = mPair.first and mCategoryStored != 0
             mChip.setOnLongClickListener {
                 if (mChip.isChecked) {
                     binding.searchCategoryChipgroup.forEach {
diff --git a/app/src/main/java/com/hippo/ehviewer/yorozuya/NumberUtils.java b/app/src/main/java/com/hippo/ehviewer/yorozuya/NumberUtils.java
deleted file mode 100644
index e1f5b9f2c..000000000
--- a/app/src/main/java/com/hippo/ehviewer/yorozuya/NumberUtils.java
+++ /dev/null
@@ -1,87 +0,0 @@
-/*
- * Copyright 2015 Hippo Seven
- *
- * 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.hippo.ehviewer.yorozuya;
-
-public final class NumberUtils {
-    private NumberUtils() {
-    }
-
-    /**
-     * 0 for false, Non 0 for true
-     *
-     * @param integer the int
-     * @return the boolean
-     */
-    public static boolean int2boolean(int integer) {
-        return integer != 0;
-    }
-
-    /**
-     * false for 0, true for 1
-     *
-     * @param bool the boolean
-     * @return the int
-     */
-    public static int boolean2int(boolean bool) {
-        return bool ? 1 : 0;
-    }
-
-    /**
-     * Do not throw NumberFormatException, use default value
-     *
-     * @param str          the string to be parsed
-     * @param defaultValue the value to return when get error
-     * @return the value of the string
-     */
-    public static int parseIntSafely(String str, int defaultValue) {
-        try {
-            return Integer.parseInt(str);
-        } catch (Throwable e) {
-            return defaultValue;
-        }
-    }
-
-    /**
-     * Do not throw NumberFormatException, use default value
-     *
-     * @param str          the string to be parsed
-     * @param defaultValue the value to return when get error
-     * @return the value of the string
-     */
-    public static long parseLongSafely(String str, long defaultValue) {
-        try {
-            return Long.parseLong(str);
-        } catch (Throwable e) {
-            return defaultValue;
-        }
-    }
-
-    /**
-     * Do not throw NumberFormatException, use default value
-     *
-     * @param str          the string to be parsed
-     * @param defaultValue the value to return when get error
-     * @return the value of the string
-     */
-    public static float parseFloatSafely(String str, float defaultValue) {
-        try {
-            return Float.parseFloat(str);
-        } catch (Throwable e) {
-            return defaultValue;
-        }
-    }
-}
diff --git a/app/src/main/java/com/hippo/ehviewer/yorozuya/OSUtils.kt b/app/src/main/java/com/hippo/ehviewer/yorozuya/OSUtils.kt
index 3dd8ee5d8..82e86cb8d 100644
--- a/app/src/main/java/com/hippo/ehviewer/yorozuya/OSUtils.kt
+++ b/app/src/main/java/com/hippo/ehviewer/yorozuya/OSUtils.kt
@@ -46,7 +46,7 @@ object OSUtils {
                         while (reader.readLine().also { line = it } != null) {
                             val matcher = PROCFS_MEMFILE_FORMAT.matcher(line!!)
                             if (matcher.find() && MEMTOTAL_STRING == matcher.group(1)) {
-                                var mem = NumberUtils.parseLongSafely(matcher.group(2)!!, -1L)
+                                var mem = matcher.group(2)!!.toLongOrDefault(-1L)
                                 if (mem != -1L) {
                                     mem *= 1024
                                 }
diff --git a/app/src/main/java/com/hippo/ehviewer/yorozuya/StringUtils.kt b/app/src/main/java/com/hippo/ehviewer/yorozuya/StringUtils.kt
index 2df92108a..8f4ba343f 100644
--- a/app/src/main/java/com/hippo/ehviewer/yorozuya/StringUtils.kt
+++ b/app/src/main/java/com/hippo/ehviewer/yorozuya/StringUtils.kt
@@ -9,3 +9,15 @@ fun String.unescapeXml(): String {
 inline infix fun <T> CharSequence.trimAnd(block: CharSequence.() -> T): T {
     return block(trim())
 }
+
+fun String.toIntOrDefault(defaultValue: Int): Int {
+    return toIntOrNull() ?: defaultValue
+}
+
+fun String.toLongOrDefault(defaultValue: Long): Long {
+    return toLongOrNull() ?: defaultValue
+}
+
+fun String.toFloatOrDefault(defaultValue: Float): Float {
+    return toFloatOrNull() ?: defaultValue
+}