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[英]Getting RecoverableSecurityException while deleting file on Android API 29 and 30 with requestLegacyExternalStorage = true in AndroidManifest
[英]Why android:requestLegacyExternalStorage=“true” not working in Android 10 - API 29
我已将我的项目 compileSdkVersion 从 28 迁移到 29,并在我的清单中添加 android:requestLegacyExternalStorage="true" ,但下载和文件打开等文件操作无法像在 SDK 28 中那样工作
gradle 文件
compileSdkVersion 29
defaultConfig {
applicationId "in.example.app"
minSdkVersion 21
targetSdkVersion 29
versionCode 90
versionName "1.8.3"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
清单文件
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="in.example.app">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.SMS_FINANCIAL_TRANSACTIONS" />
<application
android:name=".MyApp"
android:allowBackup="true"
android:hardwareAccelerated="true"
android:icon="@mipmap/ic_launcher"
android:largeHeap="true"
android:networkSecurityConfig="@xml/network_security_config"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme"
tools:replace="android:theme,android:allowBackup"
tools:targetApi="n"
android:requestLegacyExternalStorage="true">
<activity android:name=".ui.main.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="in.example.app.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths" />
</provider>
</application>
文件下载代码
fun startDownloading(path: String, url: String): Long {
return try {
val downFileName = re.replace(url.substringAfterLast("/"), "")
val downloadManager = context.getSystemService(DOWNLOAD_SERVICE) as DownloadManager
val request = DownloadManager.Request(Uri.parse(url))
request.setTitle(downFileName)
.setDestinationInExternalPublicDir(path, downFileName)
.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
downloadManager.enqueue(request)
} catch (e: Exception){
0
}
}
打开文件
fun openFile(title: String, path: String){
try {
val newFile = File(Environment.getExternalStorageDirectory().absolutePath + path, title)
val uri = if (Build.VERSION.SDK_INT > Build.VERSION_CODES.M)
{
FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID + ".fileprovider", newFile)
} else{
Uri.fromFile(newFile)
}
val intent = Intent(Intent.ACTION_VIEW, uri)
intent.setDataAndType(uri, context.contentResolver.getType(uri))
intent.flags = Intent.FLAG_ACTIVITY_CLEAR_TOP
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
val activities: List<ResolveInfo> = context.packageManager.queryIntentActivities(intent, 0)
val isIntentSafe: Boolean = activities.isNotEmpty()
// Start an activity if it's safe
if (isIntentSafe) {
context.startActivity(Intent.createChooser(intent, "Open With"))
} else{
MDToast.makeText(context, "No Application Found For Opening This File", MDToast.TYPE_INFO).show()
}
} catch (e : Exception){
println("=============== ${e.message}")
}
}
文件存在性检查
override fun checkFileExistence(title: String, path: String): Boolean {
var flag = false
try {
val direct = File(
Environment.getExternalStorageDirectory().toString()
+ path + title)
flag = direct.exists()
} catch (e: Exception) {
}
return flag
}
我添加了所有在更新到 SDK 29 时不起作用的代码,我想从服务器下载文件并将其保存到内部存储中的应用程序特定文件夹中还需要在下载之前检查文件是否已经下载它。 如果已经下载,我需要打开该文件
我有与这里提到的类似的问题。 我发现在 Android 10 上,即使文件已经下载并且我只需要打开它,我也必须检查WRITE_EXTERNAL_STORAGE
。
if (ContextCompat.checkSelfPermission(this, WRITE_EXTERNAL_STORAGE) != PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, arrayOf(WRITE_EXTERNAL_STORAGE), 100)
}
在对文件进行任何操作之前添加检查修复了打开 APK 文件时出现的“解析包时出现问题”错误。
编辑:
我还找到了另一个(可能更好)的解决方案。 我没有使用外部公共存储,而是切换到应用程序的外部存储:
downloadRequest.setDestinationInExternalFilesDir(...)
并访问文件使用
new File(context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS), mFileName);
而不是现在弃用的Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
作为奖励,无需在 AndroidManifest 中使用android:requestLegacyExternalStorage="true"
。
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