优化

app/src/main/java/io/legado/app/lib/permission/PermissionActivity.kt

@@ -2,6 +2,7 @@ package io.legado.app.lib.permission
 
 import android.content.Intent
 import android.net.Uri
+import android.os.Build
 import android.os.Bundle
 import android.provider.Settings
 import android.view.KeyEvent
@@ -34,15 +35,7 @@ class PermissionActivity : AppCompatActivity() {
                 }
             }
             //跳转到设置界面
-            Request.TYPE_REQUEST_SETTING -> try {
-                val settingIntent = Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS)
-                settingIntent.data = Uri.fromParts("package", packageName, null)
-                settingActivityResult.launch(settingIntent)
-            } catch (e: Exception) {
-                toastOnUi(R.string.tip_cannot_jump_setting_page)
-                RequestPlugins.sRequestCallback?.onError(e)
-                finish()
-            }
+            Request.TYPE_REQUEST_SETTING -> openSettingsActivity()
             //所有文件的管理权限
             Request.TYPE_MANAGE_ALL_FILES_ACCESS_PERMISSION -> try {
                 if (Permissions.isManageExternalStorage()) {
@@ -56,6 +49,30 @@ class PermissionActivity : AppCompatActivity() {
                 RequestPlugins.sRequestCallback?.onError(e)
                 finish()
             }
+            Request.TYPE_REQUEST_NOTIFICATIONS -> kotlin.runCatching {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                    //这种方案适用于 API 26, 即8.0（含8.0）以上可以用
+                    val intent = Intent()
+                    intent.action = Settings.ACTION_APP_NOTIFICATION_SETTINGS
+                    intent.putExtra(Settings.EXTRA_APP_PACKAGE, packageName)
+                    intent.putExtra(Settings.EXTRA_CHANNEL_ID, applicationInfo.uid)
+                    settingActivityResult.launch(intent)
+                } else {
+                    openSettingsActivity()
+                }
+            }
+        }
+    }
+
+    private fun openSettingsActivity() {
+        try {
+            val settingIntent = Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS)
+            settingIntent.data = Uri.fromParts("package", packageName, null)
+            settingActivityResult.launch(settingIntent)
+        } catch (e: Exception) {
+            toastOnUi(R.string.tip_cannot_jump_setting_page)
+            RequestPlugins.sRequestCallback?.onError(e)
+            finish()
         }
     }
 

app/src/main/java/io/legado/app/lib/permission/Request.kt

@@ -73,39 +73,35 @@ internal class Request : OnRequestPermissionsResultCallback {
 
         val deniedPermissions = deniedPermissions
         val rationale = this.rationale
+        if (deniedPermissions == null) {
+            onPermissionsGranted()
+            return
+        }
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
-            if (deniedPermissions == null) {
-                onPermissionsGranted()
-            } else {
-                if (rationale != null) {
-                    showSettingDialog(rationale) {
-                        onPermissionsDenied(deniedPermissions)
-                    }
-                } else {
+            if (rationale != null) {
+                showSettingDialog(rationale) {
                     onPermissionsDenied(deniedPermissions)
                 }
+            } else {
+                onPermissionsDenied(deniedPermissions)
             }
         } else {
-            if (deniedPermissions != null) {
-                if (deniedPermissions.contains(Permissions.MANAGE_EXTERNAL_STORAGE)) {
-                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
-                        if (rationale != null) {
-                            showManageFileDialog(rationale) {
-                                onPermissionsDenied(deniedPermissions)
-                            }
-                        } else {
+            if (deniedPermissions.contains(Permissions.MANAGE_EXTERNAL_STORAGE)) {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+                    if (rationale != null) {
+                        showManageFileDialog(rationale) {
                             onPermissionsDenied(deniedPermissions)
                         }
-                    }
-                } else if (deniedPermissions.size > 1) {
-                    source?.context?.startActivity<PermissionActivity> {
-                        putExtra(PermissionActivity.KEY_INPUT_REQUEST_TYPE, TYPE_REQUEST_PERMISSION)
-                        putExtra(PermissionActivity.KEY_INPUT_PERMISSIONS_CODE, requestCode)
-                        putExtra(PermissionActivity.KEY_INPUT_PERMISSIONS, deniedPermissions)
+                    } else {
+                        onPermissionsDenied(deniedPermissions)
                     }
                 }
-            } else {
-                onPermissionsGranted()
+            } else if (deniedPermissions.size > 1) {
+                source?.context?.startActivity<PermissionActivity> {
+                    putExtra(PermissionActivity.KEY_INPUT_REQUEST_TYPE, TYPE_REQUEST_PERMISSION)
+                    putExtra(PermissionActivity.KEY_INPUT_PERMISSIONS_CODE, requestCode)
+                    putExtra(PermissionActivity.KEY_INPUT_PERMISSIONS, deniedPermissions)
+                }
             }
         }
     }
@@ -248,5 +244,6 @@ internal class Request : OnRequestPermissionsResultCallback {
         const val TYPE_REQUEST_PERMISSION = 1
         const val TYPE_REQUEST_SETTING = 2
         const val TYPE_MANAGE_ALL_FILES_ACCESS_PERMISSION = 3
+        const val TYPE_REQUEST_NOTIFICATIONS = 4
     }
 }