本文介绍了使用Kotlin创建新目录,Mkdir()不起作用的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
var filename = "blesson.txt"
var wallpaperDirectory = File("/sdcard/Wallpaper")
wallpaperDirectory.mkdirs()
val outputFile = File(wallpaperDirectory, filename)
val fos = FileOutputStream(outputFile)
我正在尝试使用Kotlin在Android设备上创建新目录,但是功能mkdirs()
不起作用.
I am trying to make a new directory on an Android device using Kotlin, but the function mkdirs()
doesn't work.
var filename = "blesson.txt"
var wallpaperDirectory = File(Environment.getExternalStorageDirectory().absolutePath)//("/sdcard/Wallpaper")
wall
val outputFile = File(wallpaperDirectory, filename)
val fos = FileOutputStream(outputFile)
我也尝试过此操作,它没有建立新目录欢迎任何帮助
I have tried this also, it is not making a new directoryAny help is welcome
推荐答案
这在Kotlin上完美运行
This works perfectly on Kotlin
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
var filename = "blesson.txt"
// create a File object for the parent directory
val wallpaperDirectory = File("/sdcard/Wallpaper/")
// have the object build the directory structure, if needed.
wallpaperDirectory.mkdirs()
// create a File object for the output file
val outputFile = File(wallpaperDirectory, filename)
// now attach the OutputStream to the file object, instead of a String representation
try {
val fos = FileOutputStream(outputFile)
} catch (e: FileNotFoundException) {
e.printStackTrace()
}
}
}
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