diff --git a/app/src/main/java/com/bintianqi/owndroid/MainActivity.kt b/app/src/main/java/com/bintianqi/owndroid/MainActivity.kt
index 3415c55..48fdc4e 100644
--- a/app/src/main/java/com/bintianqi/owndroid/MainActivity.kt
+++ b/app/src/main/java/com/bintianqi/owndroid/MainActivity.kt
@@ -1,6 +1,5 @@
 package com.bintianqi.owndroid
 
-import android.app.Activity
 import android.app.admin.DevicePolicyManager
 import android.content.ComponentName
 import android.content.Context
@@ -10,7 +9,6 @@ import android.widget.Toast
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.gestures.detectTapGestures
@@ -49,28 +47,11 @@ import kotlinx.coroutines.delay
 var backToHome = false
 @ExperimentalMaterial3Api
 class MainActivity : ComponentActivity() {
-    private fun registerActivityResult(){
-        getUserIcon = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { userIconUri = it.data?.data }
-        getApk = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { apkUri = it.data?.data }
-        getCaCert = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
-            uriToStream(applicationContext,it.data?.data){stream->
-                caCert = stream.readBytes()
-                if(caCert.size>5000){ Toast.makeText(applicationContext, R.string.file_too_large, Toast.LENGTH_SHORT).show(); caCert = byteArrayOf() }
-            }
-        }
-        createManagedProfile = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {}
-        addDeviceAdmin = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
-            val myDpm = applicationContext.getSystemService(DEVICE_POLICY_SERVICE) as DevicePolicyManager
-            if(myDpm.isAdminActive(ComponentName(applicationContext, Receiver::class.java))){
-                backToHome = true
-            }
-        }
-    }
     override fun onCreate(savedInstanceState: Bundle?) {
         enableEdgeToEdge()
         WindowCompat.setDecorFitsSystemWindows(window, false)
         super.onCreate(savedInstanceState)
-        registerActivityResult()
+        registerActivityResult(this)
         setContent {
             OwnDroidTheme {
                 MyScaffold()
diff --git a/app/src/main/java/com/bintianqi/owndroid/Receiver.kt b/app/src/main/java/com/bintianqi/owndroid/Receiver.kt
index f3b7084..8e50434 100644
--- a/app/src/main/java/com/bintianqi/owndroid/Receiver.kt
+++ b/app/src/main/java/com/bintianqi/owndroid/Receiver.kt
@@ -51,6 +51,7 @@ class PackageInstallerReceiver:BroadcastReceiver(){
             else->R.string.unknown
         }
         Log.e("OwnDroid", intent.getIntExtra(EXTRA_STATUS,999).toString())
-        if(toastText!=999){Toast.makeText(context, toastText, Toast.LENGTH_SHORT).show()}
+        val text = context.getString(R.string.app_installer_status) + context.getString(toastText)
+        if(toastText!=999){Toast.makeText(context, text, Toast.LENGTH_SHORT).show()}
     }
 }
diff --git a/app/src/main/java/com/bintianqi/owndroid/Utils.kt b/app/src/main/java/com/bintianqi/owndroid/Utils.kt
index f3ce70d..702e895 100644
--- a/app/src/main/java/com/bintianqi/owndroid/Utils.kt
+++ b/app/src/main/java/com/bintianqi/owndroid/Utils.kt
@@ -1,14 +1,20 @@
 package com.bintianqi.owndroid
 
-import android.content.ClipData
-import android.content.ClipboardManager
-import android.content.Context
+import android.app.admin.DevicePolicyManager
+import android.content.*
 import android.net.Uri
 import android.widget.Toast
+import androidx.activity.ComponentActivity
+import androidx.activity.result.ActivityResultLauncher
+import androidx.activity.result.contract.ActivityResultContracts
+import com.bintianqi.owndroid.dpm.*
 import java.io.FileNotFoundException
 import java.io.IOException
 import java.io.InputStream
 
+lateinit var getFile: ActivityResultLauncher<Intent>
+var fileUri: Uri? = null
+
 fun uriToStream(
     context: Context,
     uri: Uri?,
@@ -54,3 +60,23 @@ fun writeClipBoard(context: Context, string: String):Boolean{
     }
     return true
 }
+
+
+fun registerActivityResult(context: ComponentActivity){
+    getFile = context.registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {activityResult ->
+        activityResult.data.let {
+            if(it==null){
+                Toast.makeText(context.applicationContext, R.string.file_not_exist, Toast.LENGTH_SHORT).show()
+            }else{
+                fileUri = it.data
+            }
+        }
+    }
+    createManagedProfile = context.registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {}
+    addDeviceAdmin = context.registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
+        val myDpm = context.applicationContext.getSystemService(ComponentActivity.DEVICE_POLICY_SERVICE) as DevicePolicyManager
+        if(myDpm.isAdminActive(ComponentName(context.applicationContext, Receiver::class.java))){
+            backToHome = true
+        }
+    }
+}
diff --git a/app/src/main/java/com/bintianqi/owndroid/dpm/ApplicationManage.kt b/app/src/main/java/com/bintianqi/owndroid/dpm/ApplicationManage.kt
index 5307148..5795860 100644
--- a/app/src/main/java/com/bintianqi/owndroid/dpm/ApplicationManage.kt
+++ b/app/src/main/java/com/bintianqi/owndroid/dpm/ApplicationManage.kt
@@ -229,6 +229,9 @@ private fun Home(navCtrl:NavHostController, pkgName: String){
             SubPageItem(R.string.set_default_dialer,"",R.drawable.call_fill0){navCtrl.navigate("DefaultDialer")}
         }
         Spacer(Modifier.padding(vertical = 30.dp))
+        LaunchedEffect(Unit) {
+            fileUri = null
+        }
     }
 }
 
@@ -810,19 +813,19 @@ private fun InstallApp(){
                 val installApkIntent = Intent(Intent.ACTION_GET_CONTENT)
                 installApkIntent.setType("application/vnd.android.package-archive")
                 installApkIntent.addCategory(Intent.CATEGORY_OPENABLE)
-                getApk.launch(installApkIntent)
+                getFile.launch(installApkIntent)
             },
             modifier = Modifier.fillMaxWidth()
         ) {
             Text(stringResource(R.string.select_apk))
         }
         var selected by remember{mutableStateOf(false)}
-        LaunchedEffect(selected){while(true){ delay(800); selected = apkUri!=null}}
+        LaunchedEffect(selected){while(true){ delay(800); selected = fileUri!=null}}
         AnimatedVisibility(selected) {
             Spacer(Modifier.padding(vertical = 3.dp))
             Column(modifier = Modifier.fillMaxWidth()){
                 Button(
-                    onClick = { uriToStream(myContext, apkUri){stream -> installPackage(myContext,stream)} },
+                    onClick = { uriToStream(myContext, fileUri){stream -> installPackage(myContext,stream)} },
                     modifier = Modifier.fillMaxWidth()
                 ) {
                     Text(stringResource(R.string.silent_install))
@@ -830,7 +833,7 @@ private fun InstallApp(){
                 Button(
                     onClick = {
                         val intent = Intent(Intent.ACTION_INSTALL_PACKAGE)
-                        intent.setData(apkUri)
+                        intent.setData(fileUri)
                         intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
                         myContext.startActivity(intent)
                     },
diff --git a/app/src/main/java/com/bintianqi/owndroid/dpm/DPM.kt b/app/src/main/java/com/bintianqi/owndroid/dpm/DPM.kt
index 86228b6..01179a6 100644
--- a/app/src/main/java/com/bintianqi/owndroid/dpm/DPM.kt
+++ b/app/src/main/java/com/bintianqi/owndroid/dpm/DPM.kt
@@ -9,16 +9,9 @@ var selectedPackage = ""
 var applySelectedPackage = false
 var selectedPermission = ""
 var applySelectedPermission = false
-lateinit var getCaCert: ActivityResultLauncher<Intent>
 lateinit var createManagedProfile: ActivityResultLauncher<Intent>
-lateinit var getApk: ActivityResultLauncher<Intent>
-lateinit var getUserIcon: ActivityResultLauncher<Intent>
 lateinit var addDeviceAdmin: ActivityResultLauncher<Intent>
 
-var userIconUri: Uri? = null
-var apkUri: Uri? = null
-var caCert = byteArrayOf()
-
 fun isDeviceOwner(dpm: DevicePolicyManager): Boolean {
     return dpm.isDeviceOwnerApp("com.bintianqi.owndroid")
 }
diff --git a/app/src/main/java/com/bintianqi/owndroid/dpm/Permissions.kt b/app/src/main/java/com/bintianqi/owndroid/dpm/Permissions.kt
index ee9e97b..af2764b 100644
--- a/app/src/main/java/com/bintianqi/owndroid/dpm/Permissions.kt
+++ b/app/src/main/java/com/bintianqi/owndroid/dpm/Permissions.kt
@@ -321,8 +321,7 @@ fun DeviceInfo(){
         val encryptionStatus = mutableMapOf(
             DevicePolicyManager.ENCRYPTION_STATUS_INACTIVE to stringResource(R.string.es_inactive),
             DevicePolicyManager.ENCRYPTION_STATUS_ACTIVE to stringResource(R.string.es_active),
-            DevicePolicyManager.ENCRYPTION_STATUS_UNSUPPORTED to stringResource(R.string.es_unsupported),
-            DevicePolicyManager.ENCRYPTION_STATUS_ACTIVATING to stringResource(R.string.unknown)
+            DevicePolicyManager.ENCRYPTION_STATUS_UNSUPPORTED to stringResource(R.string.es_unsupported)
         )
         if(VERSION.SDK_INT>=23){ encryptionStatus[DevicePolicyManager.ENCRYPTION_STATUS_ACTIVE_DEFAULT_KEY] = stringResource(R.string.es_active_default_key) }
         if(VERSION.SDK_INT>=24){ encryptionStatus[DevicePolicyManager.ENCRYPTION_STATUS_ACTIVE_PER_USER] = stringResource(R.string.es_active_per_user) }
@@ -428,6 +427,8 @@ private fun SupportMsg(){
                 focusMgr.clearFocus()
                 myDpm.setShortSupportMessage(myComponent, shortMsg)
                 myDpm.setLongSupportMessage(myComponent, longMsg)
+                shortMsg = myDpm.getShortSupportMessage(myComponent)?.toString() ?: ""
+                longMsg = myDpm.getLongSupportMessage(myComponent)?.toString() ?: ""
                 Toast.makeText(myContext, R.string.success, Toast.LENGTH_SHORT).show()
             },
             modifier = Modifier.fillMaxWidth()
@@ -440,6 +441,8 @@ private fun SupportMsg(){
                 focusMgr.clearFocus()
                 myDpm.setShortSupportMessage(myComponent, null)
                 myDpm.setLongSupportMessage(myComponent, null)
+                shortMsg = myDpm.getShortSupportMessage(myComponent)?.toString() ?: ""
+                longMsg = myDpm.getLongSupportMessage(myComponent)?.toString() ?: ""
                 Toast.makeText(myContext, R.string.success, Toast.LENGTH_SHORT).show()
             },
             modifier = Modifier.fillMaxWidth()
diff --git a/app/src/main/java/com/bintianqi/owndroid/dpm/SystemManager.kt b/app/src/main/java/com/bintianqi/owndroid/dpm/SystemManager.kt
index d4c831e..3ebf4d5 100644
--- a/app/src/main/java/com/bintianqi/owndroid/dpm/SystemManager.kt
+++ b/app/src/main/java/com/bintianqi/owndroid/dpm/SystemManager.kt
@@ -41,9 +41,8 @@ import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.currentBackStackEntryAsState
 import androidx.navigation.compose.rememberNavController
+import com.bintianqi.owndroid.*
 import com.bintianqi.owndroid.R
-import com.bintianqi.owndroid.Receiver
-import com.bintianqi.owndroid.toText
 import com.bintianqi.owndroid.ui.*
 import com.bintianqi.owndroid.ui.theme.bgColor
 import kotlinx.coroutines.delay
@@ -152,7 +151,7 @@ private fun Home(navCtrl: NavHostController,scrollState: ScrollState){
         }
         SubPageItem(R.string.wipe_data,"",R.drawable.warning_fill0){navCtrl.navigate("WipeData")}
         Spacer(Modifier.padding(vertical = 30.dp))
-        LaunchedEffect(Unit){caCert =byteArrayOf()}
+        LaunchedEffect(Unit){fileUri=null}
     }
 }
 
@@ -596,34 +595,52 @@ private fun CaCert(){
     val myDpm = myContext.getSystemService(ComponentActivity.DEVICE_POLICY_SERVICE) as DevicePolicyManager
     val myComponent = ComponentName(myContext,Receiver::class.java)
     var exist by remember{mutableStateOf(false)}
-    var isEmpty by remember{mutableStateOf(true)}
+    var uriPath by remember{mutableStateOf("")}
+    var caCertByteArray = byteArrayOf()
     val refresh = {
-        isEmpty = caCert.isEmpty()
-        exist = if(!isEmpty){ myDpm.hasCaCertInstalled(myComponent, caCert) }else{ false }
+        if(uriPath!=fileUri?.path){
+            if(caCertByteArray.isEmpty()){
+                uriToStream(myContext, fileUri){
+                    val array = it.readBytes()
+                    caCertByteArray = if(array.size<10000){
+                        array
+                    }else{
+                        byteArrayOf()
+                    }
+                }
+                exist = myDpm.hasCaCertInstalled(myComponent, caCertByteArray)
+            }
+        }
     }
-    LaunchedEffect(exist){ while(true){ refresh();delay(600) } }
+    LaunchedEffect(exist){ while(true){ refresh();delay(500) } }
     Column(modifier = Modifier.fillMaxSize().padding(horizontal = 8.dp).verticalScroll(rememberScrollState())){
         Spacer(Modifier.padding(vertical = 10.dp))
         Text(text = stringResource(R.string.ca_cert), style = typography.headlineLarge)
         Spacer(Modifier.padding(vertical = 5.dp))
-        Text(text = if(isEmpty){stringResource(R.string.please_select_ca_cert)}else{stringResource(R.string.cacert_installed, exist)}, modifier = Modifier.animateContentSize())
+        AnimatedVisibility(uriPath!="") {
+            Text(text = uriPath)
+        }
+        Text(
+            text = if(uriPath==""){stringResource(R.string.please_select_ca_cert)}else{stringResource(R.string.cacert_installed, exist)},
+            modifier = Modifier.animateContentSize()
+        )
         Spacer(Modifier.padding(vertical = 5.dp))
         Button(
             onClick = {
                 val caCertIntent = Intent(Intent.ACTION_GET_CONTENT)
                 caCertIntent.setType("*/*")
                 caCertIntent.addCategory(Intent.CATEGORY_OPENABLE)
-                getCaCert.launch(caCertIntent)
+                getFile.launch(caCertIntent)
             },
             modifier = Modifier.fillMaxWidth()
         ) {
             Text(stringResource(R.string.select_ca_cert))
         }
-        AnimatedVisibility(!isEmpty) {
+        AnimatedVisibility(uriPath!="") {
             Row(modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.SpaceBetween){
                 Button(
                     onClick = {
-                        val result = myDpm.installCaCert(myComponent, caCert)
+                        val result = myDpm.installCaCert(myComponent, caCertByteArray)
                         Toast.makeText(myContext, if(result){R.string.success}else{R.string.fail}, Toast.LENGTH_SHORT).show()
                         refresh()
                     },
@@ -634,8 +651,8 @@ private fun CaCert(){
                 Button(
                     onClick = {
                         if(exist){
-                            myDpm.uninstallCaCert(myComponent, caCert)
-                            exist = myDpm.hasCaCertInstalled(myComponent, caCert)
+                            myDpm.uninstallCaCert(myComponent, caCertByteArray)
+                            exist = myDpm.hasCaCertInstalled(myComponent, caCertByteArray)
                             Toast.makeText(myContext, if(exist){R.string.fail}else{R.string.success}, Toast.LENGTH_SHORT).show()
                         }else{ Toast.makeText(myContext, R.string.not_exist, Toast.LENGTH_SHORT).show() }
                     },
diff --git a/app/src/main/java/com/bintianqi/owndroid/dpm/UserManager.kt b/app/src/main/java/com/bintianqi/owndroid/dpm/UserManager.kt
index d793f57..78e731a 100644
--- a/app/src/main/java/com/bintianqi/owndroid/dpm/UserManager.kt
+++ b/app/src/main/java/com/bintianqi/owndroid/dpm/UserManager.kt
@@ -40,12 +40,10 @@ import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.currentBackStackEntryAsState
 import androidx.navigation.compose.rememberNavController
+import com.bintianqi.owndroid.*
 import com.bintianqi.owndroid.R
-import com.bintianqi.owndroid.Receiver
-import com.bintianqi.owndroid.toText
 import com.bintianqi.owndroid.ui.*
 import com.bintianqi.owndroid.ui.theme.bgColor
-import com.bintianqi.owndroid.uriToStream
 import kotlinx.coroutines.delay
 
 var affiliationID = mutableSetOf<String>()
@@ -122,6 +120,9 @@ private fun Home(navCtrl: NavHostController,scrollState: ScrollState){
             SubPageItem(R.string.affiliation_id,"",R.drawable.id_card_fill0){navCtrl.navigate("AffiliationID")}
         }
         Spacer(Modifier.padding(vertical = 30.dp))
+        LaunchedEffect(Unit) {
+            fileUri = null
+        }
     }
 }
 
@@ -509,17 +510,17 @@ private fun UserIcon(){
                 val intent = Intent(if(getContent){Intent.ACTION_GET_CONTENT}else{Intent.ACTION_PICK})
                 if(getContent){intent.addCategory(Intent.CATEGORY_OPENABLE)}
                 intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*")
-                getUserIcon.launch(intent)
+                getFile.launch(intent)
             },
             modifier = Modifier.fillMaxWidth()
         ) {
             Text(stringResource(R.string.select_picture))
         }
-        LaunchedEffect(Unit){ delay(600); canApply = userIconUri!=null }
+        LaunchedEffect(Unit){ delay(600); canApply = fileUri!=null }
         AnimatedVisibility(canApply) {
             Button(
                 onClick = {
-                    uriToStream(myContext, userIconUri){stream ->
+                    uriToStream(myContext, fileUri){stream ->
                         val bitmap = BitmapFactory.decodeStream(stream)
                         myDpm.setUserIcon(myComponent,bitmap)
                         Toast.makeText(myContext, R.string.success, Toast.LENGTH_SHORT).show()
diff --git a/app/src/main/java/com/bintianqi/owndroid/ui/Animations.kt b/app/src/main/java/com/bintianqi/owndroid/ui/Animations.kt
index d6fbe40..f7a9079 100644
--- a/app/src/main/java/com/bintianqi/owndroid/ui/Animations.kt
+++ b/app/src/main/java/com/bintianqi/owndroid/ui/Animations.kt
@@ -14,7 +14,7 @@ object Animations{
     private val tween: FiniteAnimationSpec<IntOffset> = tween(450, easing = bezier)
     
     val navHostEnterTransition: AnimatedContentTransitionScope<NavBackStackEntry>.() -> EnterTransition = {
-        fadeIn(tween(83, easing = LinearEasing)) +
+        fadeIn(tween(150, easing = LinearEasing)) +
         slideIntoContainer(
             animationSpec = tween,
             towards = AnimatedContentTransitionScope.SlideDirection.End,
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index e4f0538..f2af943 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -43,7 +43,6 @@
     <string name="copy_command">复制代码</string>
     <string name="unknown_status">未知状态</string>
     <string name="copy">复制</string>
-    <string name="file_too_large">文件太大了</string>
     <string name="file_not_exist">文件不存在</string>
     <string name="io_exception">IO异常</string>
 
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 9d6f5c3..86e0bb8 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -46,7 +46,6 @@
     <string name="not_exist">Not exist</string>
     <string name="unknown_status">Unknown status</string>
     <string name="copy">Copy</string>
-    <string name="file_too_large">File too large</string>
     <string name="file_not_exist">File not exist</string>
     <string name="io_exception">IO Exception</string>