diff --git a/app/src/main/java/luyao/util/ktx/ui/SharedPreferencesActivity.kt b/app/src/main/java/luyao/util/ktx/ui/SharedPreferencesActivity.kt
index c58e3d1..5c17b00 100644
--- a/app/src/main/java/luyao/util/ktx/ui/SharedPreferencesActivity.kt
+++ b/app/src/main/java/luyao/util/ktx/ui/SharedPreferencesActivity.kt
@@ -23,6 +23,7 @@ class SharedPreferencesActivity : BaseActivity() {
 
     override fun initData() {
 
+
         putInt.setOnClickListener {
             putSpValue("int", 1)
             toast(getSpValue("int", 0).toString())
@@ -33,7 +34,7 @@ class SharedPreferencesActivity : BaseActivity() {
         }
         putBoolean.setOnClickListener {
             putSpValue("boolean", true)
-            toast(getSpValue("boolean", false).toString())
+            toast(getSpValue(key = "boolean", default = false).toString())
         }
         putString.setOnClickListener {
             putSpValue("string", "ktx")
@@ -47,9 +48,16 @@ class SharedPreferencesActivity : BaseActivity() {
             putSpValue("tag1", 1)
             putSpValue("tag2", false)
             putSpValue("tag3", Person("bingxin", 1))
-            toast("${getSpValue("tag1",0)}\n" +
-                    "${getSpValue("tag2",true)}\n" +
-                    "${getSpValue("tag3",Person("default",0))}")
+            toast(
+                "${getSpValue("tag1", 0)}\n" +
+                        "${getSpValue("tag2", true)}\n" +
+                        "${getSpValue("tag3", Person("default", 0))}"
+            )
+        }
+
+        putAnotherFile.setOnClickListener {
+            putSpValue("another","from another sp file",name = "another")
+            toast(getSpValue("another","null",name = "another"))
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_sharedperferences.xml b/app/src/main/res/layout/activity_sharedperferences.xml
index 787e72a..7f8139d 100644
--- a/app/src/main/res/layout/activity_sharedperferences.xml
+++ b/app/src/main/res/layout/activity_sharedperferences.xml
@@ -36,4 +36,9 @@
             android:text="putMulti"
             style="@style/NormalButton"/>
 
+    <androidx.appcompat.widget.AppCompatButton
+            android:id="@+id/putAnotherFile"
+            android:text="putAnotherFile"
+            style="@style/NormalButton"/>
+
 </LinearLayout>
\ No newline at end of file
diff --git a/ktx/src/main/java/luyao/util/ktx/ext/sp/SharedPreferencesExt.kt b/ktx/src/main/java/luyao/util/ktx/ext/sp/SharedPreferencesExt.kt
index ab24890..d8f3a33 100644
--- a/ktx/src/main/java/luyao/util/ktx/ext/sp/SharedPreferencesExt.kt
+++ b/ktx/src/main/java/luyao/util/ktx/ext/sp/SharedPreferencesExt.kt
@@ -23,49 +23,60 @@ inline fun SharedPreferences.edit(commit: Boolean = false, action: SharedPrefere
         editor.apply()
 }
 
-fun Context.sp(name: String = packageName, mode: Int = Context.MODE_PRIVATE) =
+fun Context.sp(name: String = packageName, mode: Int = Context.MODE_PRIVATE): SharedPreferences =
     getSharedPreferences(name, mode)
 
-fun Activity.sp(name: String = packageName, mode: Int = Context.MODE_PRIVATE) =
+fun Activity.sp(name: String = packageName, mode: Int = Context.MODE_PRIVATE): SharedPreferences =
     getSharedPreferences(name, mode)
 
 
-fun <T> Context.putSpValue(name: String, value: T) = sp().edit {
+fun <T> Context.putSpValue(name: String = packageName, key: String, value: T) = sp(name).edit {
     when (value) {
-        is Long -> putLong(name, value)
-        is String -> putString(name, value)
-        is Int -> putInt(name, value)
-        is Boolean -> putBoolean(name, value)
-        is Float -> putFloat(name, value)
-        else -> putString(name, serialize(value))
+        is Long -> putLong(key, value)
+        is String -> putString(key, value)
+        is Int -> putInt(key, value)
+        is Boolean -> putBoolean(key, value)
+        is Float -> putFloat(key, value)
+        else -> putString(key, serialize(value))
     }
 }
 
-fun <T> Activity.putSpValue(name: String, value: T) = sp().edit {
+fun <T> Activity.putSpValue(key: String, value: T, name: String = packageName) = sp(name).edit {
     when (value) {
-        is Long -> putLong(name, value)
-        is String -> putString(name, value)
-        is Int -> putInt(name, value)
-        is Boolean -> putBoolean(name, value)
-        is Float -> putFloat(name, value)
-        else -> putString(name, serialize(value))
+        is Long -> putLong(key, value)
+        is String -> putString(key, value)
+        is Int -> putInt(key, value)
+        is Boolean -> putBoolean(key, value)
+        is Float -> putFloat(key, value)
+        else -> putString(key, serialize(value))
     }
 }
 
-fun <T> Context.getSpValue(key: String, default: T) :T{
-    sp().run {
-        val result = when (default) {
-            is Long -> getLong(key, default)
-            is String -> getString(key, default)
-            is Int -> getInt(key, default)
-            is Boolean -> getBoolean(key, default)
-            is Float -> getFloat(key, default)
-            else -> deSerialization(getString(key, serialize(default)))
-        }
-        return result as T
+fun <T> Context.getSpValue(key: String, default: T, name: String = packageName ): T = sp(name).run {
+    val result = when (default) {
+        is Long -> getLong(key, default)
+        is String -> getString(key, default)
+        is Int -> getInt(key, default)
+        is Boolean -> getBoolean(key, default)
+        is Float -> getFloat(key, default)
+        else -> deSerialization(getString(key, serialize(default)))
     }
+    result as T
 }
 
+fun <T> Activity.getSpValue(key: String, default: T, name: String = packageName): T = sp(name).run {
+    val result = when (default) {
+        is Long -> getLong(key, default)
+        is String -> getString(key, default)
+        is Int -> getInt(key, default)
+        is Boolean -> getBoolean(key, default)
+        is Float -> getFloat(key, default)
+        else -> deSerialization(getString(key, serialize(default)))
+    }
+    return result as T
+}
+
+
 private fun <T> serialize(obj: T): String {
     val byteArrayOutputStream = ByteArrayOutputStream()
     val objectOutputStream = ObjectOutputStream(