simplify code of get file with MutableStateFlow

app/src/main/java/com/bintianqi/owndroid/MainActivity.kt

@@ -42,9 +42,10 @@ import com.bintianqi.owndroid.dpm.*
 import com.bintianqi.owndroid.ui.Animations
 import com.bintianqi.owndroid.ui.theme.OwnDroidTheme
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
 import java.util.Locale
 
-var backToHome = false
+var backToHomeStateFlow = MutableStateFlow(false)
 @ExperimentalMaterial3Api
 class MainActivity : FragmentActivity() {
     private val showAuth = mutableStateOf(false)
@@ -98,11 +99,9 @@ fun Home(materialYou:MutableState<Boolean>, blackTheme:MutableState<Boolean>){
     val focusMgr = LocalFocusManager.current
     val pkgName = mutableStateOf("")
     val dialogStatus = mutableIntStateOf(0)
+    val backToHome by backToHomeStateFlow.collectAsState()
     LaunchedEffect(Unit){
-        while(true){
-            if(backToHome){ navCtrl.navigateUp(); backToHome=false }
-            delay(200)
-        }
+        if(backToHome) { navCtrl.navigateUp(); backToHomeStateFlow.value = false }
     }
     NavHost(
         navController = navCtrl,

app/src/main/java/com/bintianqi/owndroid/PermissionPicker.kt

@@ -38,7 +38,7 @@ fun PermissionPicker(navCtrl: NavHostController){
                         .fillMaxWidth()
                         .clickable{
                             selectedPermission = it.first
-                            applySelectedPermission = true
+                            applySelectedPermission.value = true
                             navCtrl.navigateUp()
                         }
                         .padding(vertical = 6.dp, horizontal = 8.dp)

app/src/main/java/com/bintianqi/owndroid/PkgSelector.kt

@@ -3,7 +3,10 @@ package com.bintianqi.owndroid
 import android.graphics.drawable.Drawable
 import android.widget.Toast
 import androidx.compose.animation.AnimatedVisibility
-import androidx.compose.foundation.*
+import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.combinedClickable
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
@@ -24,8 +27,10 @@ import androidx.compose.ui.unit.dp
 import androidx.navigation.NavHostController
 import com.bintianqi.owndroid.ui.NavIcon
 import com.google.accompanist.drawablepainter.rememberDrawablePainter
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 
 private data class PkgInfo(
     val pkgName: String,
@@ -48,7 +53,7 @@ fun PackageSelector(navCtrl:NavHostController, pkgName: MutableState<String>){
     var filter by remember{mutableStateOf("data")}
     val scrollState = rememberLazyListState()
     val co = rememberCoroutineScope()
-    val getPkgList:suspend ()->Unit = {
+    val getPkgList: suspend ()->Unit = {
         show = false
         progress = 0
         hideProgress = false
@@ -65,11 +70,10 @@ fun PackageSelector(navCtrl:NavHostController, pkgName: MutableState<String>){
                 else if(srcDir.contains("apex")){"apex"}
                 else{"system"}
             )
-            progress+=1
-            delay(1)
+            withContext(Dispatchers.Main) { progress += 1 }
         }
         show = true
-        delay(300)
+        delay(500)
         hideProgress = true
     }
     Scaffold(
@@ -114,7 +118,6 @@ fun PackageSelector(navCtrl:NavHostController, pkgName: MutableState<String>){
                             .clip(RoundedCornerShape(50))
                             .clickable{
                                 co.launch{
-                                    delay(100)
                                     getPkgList()
                                 }
                             }
@@ -153,9 +156,8 @@ fun PackageSelector(navCtrl:NavHostController, pkgName: MutableState<String>){
                 }
             }
         }
-        LaunchedEffect(Unit){
-            delay(250)
-            if(pkgs.size==0){getPkgList()}
+        LaunchedEffect(Unit) {
+            if(pkgs.size==0) { getPkgList() }
         }
     }
 }

app/src/main/java/com/bintianqi/owndroid/Utils.kt

@@ -9,12 +9,13 @@ import androidx.activity.result.ActivityResultLauncher
 import androidx.activity.result.contract.ActivityResultContracts
 import com.bintianqi.owndroid.dpm.addDeviceAdmin
 import com.bintianqi.owndroid.dpm.createManagedProfile
+import kotlinx.coroutines.flow.MutableStateFlow
 import java.io.FileNotFoundException
 import java.io.IOException
 import java.io.InputStream
 
 lateinit var getFile: ActivityResultLauncher<Intent>
-var fileUri: Uri? = null
+val fileUriFlow = MutableStateFlow(Uri.parse(""))
 
 var zhCN = true
 
@@ -71,15 +72,15 @@ fun registerActivityResult(context: ComponentActivity){
             if(it==null){
                 Toast.makeText(context.applicationContext, R.string.file_not_exist, Toast.LENGTH_SHORT).show()
             }else{
-                fileUri = it.data
+                fileUriFlow.value = it.data
             }
         }
     }
     createManagedProfile = context.registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {}
     addDeviceAdmin = context.registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
         val dpm = context.applicationContext.getSystemService(ComponentActivity.DEVICE_POLICY_SERVICE) as DevicePolicyManager
         if(dpm.isAdminActive(ComponentName(context.applicationContext, Receiver::class.java))){
-            backToHome = true
+            backToHomeStateFlow.value = true
         }
     }
 }

app/src/main/java/com/bintianqi/owndroid/dpm/ApplicationManage.kt

@@ -52,7 +52,6 @@ import androidx.navigation.compose.rememberNavController
 import com.bintianqi.owndroid.*
 import com.bintianqi.owndroid.R
 import com.bintianqi.owndroid.ui.*
-import kotlinx.coroutines.delay
 import java.io.IOException
 import java.io.InputStream
 import java.util.concurrent.Executors
@@ -263,9 +262,7 @@ private fun Home(navCtrl:NavHostController, pkgName: String, dialogStatus: Mutab
             SubPageItem(R.string.set_default_dialer,"",R.drawable.call_fill0){navCtrl.navigate("DefaultDialer")}
         }
         Spacer(Modifier.padding(vertical = 30.dp))
-        LaunchedEffect(Unit) {
-            fileUri = null
-        }
+        LaunchedEffect(Unit) { fileUriFlow.value = Uri.parse("") }
     }
 }
 
@@ -348,10 +345,10 @@ private fun PermissionManage(pkgName: String, navCtrl: NavHostController){
         PERMISSION_GRANT_STATE_GRANTED to stringResource(R.string.granted),
         PERMISSION_GRANT_STATE_DENIED to stringResource(R.string.denied)
     )
-    LaunchedEffect(Unit) {
-        while(true){
-            if(applySelectedPermission){inputPermission = selectedPermission; applySelectedPermission = false}
-            delay(100)
+    LaunchedEffect(applySelectedPermission.collectAsState()) {
+        if(applySelectedPermission.value) {
+            inputPermission = selectedPermission
+            applySelectedPermission.value = false
         }
     }
     LaunchedEffect(pkgName) {
@@ -794,6 +791,7 @@ private fun UninstallApp(pkgName: String){
 private fun InstallApp(){
     val context = LocalContext.current
     val focusMgr = LocalFocusManager.current
+    val selected = fileUriFlow.collectAsState().value != Uri.parse("")
     Column(modifier = Modifier.fillMaxSize().padding(horizontal = 8.dp).verticalScroll(rememberScrollState())){
         Spacer(Modifier.padding(vertical = 10.dp))
         Text(text = stringResource(R.string.install_app), style = typography.headlineLarge)
@@ -810,21 +808,19 @@ private fun InstallApp(){
         ) {
             Text(stringResource(R.string.select_apk))
         }
-        var selected by remember{mutableStateOf(false)}
-        LaunchedEffect(selected){while(true){ delay(800); selected = fileUri!=null}}
         AnimatedVisibility(selected) {
             Spacer(Modifier.padding(vertical = 3.dp))
             Column(modifier = Modifier.fillMaxWidth()){
                 Button(
-                    onClick = { uriToStream(context, fileUri){stream -> installPackage(context,stream)} },
+                    onClick = { uriToStream(context, fileUriFlow.value){stream -> installPackage(context,stream)} },
                     modifier = Modifier.fillMaxWidth()
                 ) {
                     Text(stringResource(R.string.silent_install))
                 }
                 Button(
                     onClick = {
                         val intent = Intent(Intent.ACTION_INSTALL_PACKAGE)
-                        intent.setData(fileUri)
+                        intent.setData(fileUriFlow.value)
                         intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
                         context.startActivity(intent)
                     },

app/src/main/java/com/bintianqi/owndroid/dpm/DPM.kt

@@ -2,11 +2,11 @@ package com.bintianqi.owndroid.dpm
 
 import android.app.admin.DevicePolicyManager
 import android.content.Intent
-import android.net.Uri
 import androidx.activity.result.ActivityResultLauncher
+import kotlinx.coroutines.flow.MutableStateFlow
 
 var selectedPermission = ""
-var applySelectedPermission = false
+var applySelectedPermission = MutableStateFlow(false)
 lateinit var createManagedProfile: ActivityResultLauncher<Intent>
 lateinit var addDeviceAdmin: ActivityResultLauncher<Intent>
 

app/src/main/java/com/bintianqi/owndroid/dpm/ShizukuActivate.kt

@@ -129,7 +129,7 @@ fun ShizukuActivate(){
                     coScope.launch{
                         outputText = service!!.execute(context.getString(R.string.dpm_activate_po_command))
                         outputTextScrollState.animateScrollTo(0, scrollAnim())
-                        delay(600)
+                        delay(500)
                         showProfileOwnerButton = !isProfileOwner(dpm)
                     }
                 },

app/src/main/java/com/bintianqi/owndroid/dpm/SystemManager.kt

@@ -11,6 +11,7 @@ import android.app.admin.SystemUpdatePolicy.TYPE_POSTPONE
 import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
+import android.net.Uri
 import android.os.Binder
 import android.os.Build.VERSION
 import android.os.UserManager
@@ -19,11 +20,14 @@ import android.widget.Toast
 import androidx.activity.ComponentActivity
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.animateContentSize
-import androidx.compose.foundation.*
+import androidx.compose.foundation.ScrollState
+import androidx.compose.foundation.focusable
 import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.text.KeyboardActions
 import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.foundation.text.selection.SelectionContainer
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.*
 import androidx.compose.material3.MaterialTheme.colorScheme
 import androidx.compose.material3.MaterialTheme.typography
@@ -44,7 +48,6 @@ import androidx.navigation.compose.rememberNavController
 import com.bintianqi.owndroid.*
 import com.bintianqi.owndroid.R
 import com.bintianqi.owndroid.ui.*
-import kotlinx.coroutines.delay
 import java.util.Date
 
 @Composable
@@ -150,7 +153,7 @@ 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){fileUri=null}
+        LaunchedEffect(Unit){ fileUriFlow.value = Uri.parse("") }
     }
 }
 
@@ -593,26 +596,23 @@ private fun CaCert(){
     val context = LocalContext.current
     val dpm = context.getSystemService(ComponentActivity.DEVICE_POLICY_SERVICE) as DevicePolicyManager
     val receiver = ComponentName(context,Receiver::class.java)
+    val uri by fileUriFlow.collectAsState()
     var exist by remember{mutableStateOf(false)}
-    var uriPath by remember{mutableStateOf("")}
-    var caCertByteArray = byteArrayOf()
-    val refresh = {
-        if(uriPath!=fileUri?.path){
-            if(caCertByteArray.isEmpty()){
-                uriToStream(context, fileUri){
-                    val array = it.readBytes()
-                    caCertByteArray = if(array.size<10000){
-                        array
-                    }else{
-                        byteArrayOf()
-                    }
+    val uriPath = uri.path ?: ""
+    var caCertByteArray by remember{ mutableStateOf(byteArrayOf()) }
+    LaunchedEffect(uri) {
+        if(uri != Uri.parse("")) {
+            uriToStream(context, uri){
+                val array = it.readBytes()
+                caCertByteArray = if(array.size<10000){
+                    array
+                }else{
+                    byteArrayOf()
                 }
-                exist = dpm.hasCaCertInstalled(receiver, caCertByteArray)
             }
-            uriPath = fileUri?.path?:""
+            exist = dpm.hasCaCertInstalled(receiver, caCertByteArray)
         }
     }
-    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)
@@ -642,7 +642,7 @@ private fun CaCert(){
                     onClick = {
                         val result = dpm.installCaCert(receiver, caCertByteArray)
                         Toast.makeText(context, if(result){R.string.success}else{R.string.fail}, Toast.LENGTH_SHORT).show()
-                        refresh()
+                        exist = dpm.hasCaCertInstalled(receiver, caCertByteArray)
                     },
                     modifier = Modifier.fillMaxWidth(0.49F)
                 ) {

app/src/main/java/com/bintianqi/owndroid/dpm/UserManager.kt

@@ -6,6 +6,7 @@ import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
 import android.graphics.BitmapFactory
+import android.net.Uri
 import android.os.Binder
 import android.os.Build.VERSION
 import android.os.Process
@@ -119,9 +120,7 @@ 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
-        }
+        LaunchedEffect(Unit) { fileUriFlow.value = Uri.parse("") }
     }
 }
 
@@ -495,7 +494,7 @@ private fun UserIcon(){
     val dpm = context.getSystemService(ComponentActivity.DEVICE_POLICY_SERVICE) as DevicePolicyManager
     val receiver = ComponentName(context,Receiver::class.java)
     var getContent by remember{mutableStateOf(false)}
-    var canApply by remember{mutableStateOf(false)}
+    val canApply = fileUriFlow.collectAsState().value != Uri.parse("")
     Column(modifier = Modifier.fillMaxSize().padding(horizontal = 8.dp).verticalScroll(rememberScrollState())){
         Spacer(Modifier.padding(vertical = 10.dp))
         Text(text = stringResource(R.string.change_user_icon), style = typography.headlineLarge)
@@ -515,11 +514,10 @@ private fun UserIcon(){
         ) {
             Text(stringResource(R.string.select_picture))
         }
-        LaunchedEffect(Unit){ delay(600); canApply = fileUri!=null }
         AnimatedVisibility(canApply) {
             Button(
                 onClick = {
-                    uriToStream(context, fileUri){stream ->
+                    uriToStream(context, fileUriFlow.value){stream ->
                         val bitmap = BitmapFactory.decodeStream(stream)
                         dpm.setUserIcon(receiver,bitmap)
                         Toast.makeText(context, R.string.success, Toast.LENGTH_SHORT).show()