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我正在开发一个 android 应用程序，我曾经在其中FileObserver获取特定文件夹的数据更改。该文件夹是 WhatsApp 图片，每当有新文件添加到该文件夹​​时，我都会在触发时执行我的进一步onEvent工作FileObserver。在我设置之前一切正常，targetSdkVersion=29但是当我将项目迁移到targetSdkVersion=30FileObserver 时停止工作。

下面是我的 FileObserver 代码

import android.os.Environment
import android.os.FileObserver
import android.util.Log
import java.io.File

    class WhatsAppImageObserver11(var notify:(msg:String)->Unit) : FileObserver(
        File(
            Environment.getExternalStorageDirectory().toString(),
            Constants.whatsapp_images_path11).toString(), ALL_EVENTS
    ) {
        init {
            Log.d("WhatsAppImageObserver11", "start")
        }
    
        override fun onEvent(i: Int, str: String?) {
            val str2 = "WhatsAppImageObserver11"
            if (i == CREATE || i == MOVED_TO && str != ".probe") {
                val sb = StringBuilder()
                sb.append("create File path--> ")
                sb.append(str)
                Log.d(str2, sb.toString())
                try {
                    val whatsDeleted = File(
                        Environment.getExternalStorageDirectory().path,
                        Constants.whatsapp_reserved_media
                    )
                    if(!whatsDeleted.exists()) {
                        whatsDeleted.mkdirs()
                    }
                    val srcFile = File(
                        Environment.getExternalStorageDirectory(),
                        Constants.whatsapp_images_path11+str)
                    val destFile = File(Environment.getExternalStorageDirectory(), Constants.whatsapp_reserved_media+str)
                    if (srcFile.exists()){
                        srcFile.copyTo(target = destFile, overwrite = false, bufferSize = DEFAULT_BUFFER_SIZE)
                    }
                } catch (e: Exception) {
                    val sb2 = StringBuilder()
                    sb2.append("create error: ")
                    sb2.append(e.toString())
                    Log.d(str2, sb2.toString())
                }
            }
            if (i and 512 != 0 || i and 1024 != 0) {
                val sb3 = StringBuilder()
                sb3.append("dlete File path--> ")
                sb3.append(str)
                Log.d(str2, sb3.toString())
                try {
                    val whatsDeleted = File(
                        Environment.getExternalStorageDirectory().path,
                        Constants.new_whatsapp_deleted_media
                    )
                    if(!whatsDeleted.exists()) {
                        whatsDeleted.mkdirs()
                    }
                    val srcFile = File(Environment.getExternalStorageDirectory().path, Constants.whatsapp_reserved_media+str)
                    val destFile = File(Environment.getExternalStorageDirectory().path, Constants.new_whatsapp_deleted_media+str)
    
                    if (srcFile.exists()){
                        srcFile.copyTo(target = destFile, overwrite = false, bufferSize = DEFAULT_BUFFER_SIZE)
                        srcFile.delete()
                        notify(destFile.absolutePath)
                    }
                } catch (e2: Exception) {
                    val sb4 = StringBuilder()
                    sb4.append("del error: ")
                    sb4.append(e2.toString())
                    Log.d(str2, sb4.toString())
                }
    
            }
        }
    }

在此 FileObserver 中，我正在将媒体从 WhatsApp 保留媒体复制到我自己的 WhatsAppDeleted 文件夹以进行媒体恢复功能。

我试过什么？

1-据我所知Environment.getExternalStorageDirectory()已弃用，我尝试将其替换为mContext.getExternalFilesDir(null).getAbsolutePath()

2-也在android:preserveLegacyExternalStorage="true"清单中检查使用。

3-尝试添加忽略属性

<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"
        tools:ignore="ScopedStorage"/>

什么是必需的？

1-路径上的 FileObserver应该在我设置时"/Android/media/" + WHATSAPP_PKG_NAME + "/WhatsApp/Media/WhatsApp Images/"触发onEventtargetSdkVersion-30

有人可以帮我解决这个问题吗？任何帮助将不胜感激。

谢谢

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0 回答 0