「Android/kotlin/ストレージ/残り容量」の版間の差分
提供: 初心者エンジニアの簡易メモ
| 行1: | 行1: | ||
MainActivity.kt | MainActivity.kt | ||
<pre> | <pre> | ||
| − | + | Log.i("MainActivity", "freesize=" + FileStorage(this).getFreeMB()) // freesize=40121.0 | |
| − | + | ||
| − | + | ||
</pre> | </pre> | ||
FileStorage.kt | FileStorage.kt | ||
| 行15: | 行13: | ||
class FileStorage(private var context: Context) { | class FileStorage(private var context: Context) { | ||
| − | |||
fun getFreeMB(): Double { | fun getFreeMB(): Double { | ||
var freeByteSize: Double = 0.0 | var freeByteSize: Double = 0.0 | ||
| 行21: | 行18: | ||
// 外部保存領域が使用可能かチェック | // 外部保存領域が使用可能かチェック | ||
if (Environment.MEDIA_MOUNTED == state || Environment.MEDIA_MOUNTED_READ_ONLY == state) { | if (Environment.MEDIA_MOUNTED == state || Environment.MEDIA_MOUNTED_READ_ONLY == state) { | ||
| − | var path = context.getExternalFilesDir(Environment.DIRECTORY_DOCUMENTS) | + | var path = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { |
| + | context.getExternalFilesDir(Environment.DIRECTORY_DOCUMENTS) | ||
| + | } else { | ||
| + | TODO("VERSION.SDK_INT < KITKAT") | ||
| + | } | ||
// 空きMBを返す | // 空きMBを返す | ||
freeByteSize = Math.floor((path!!.freeSpace / 1024 / 1024).toDouble()) | freeByteSize = Math.floor((path!!.freeSpace / 1024 / 1024).toDouble()) | ||
2020年3月25日 (水) 19:18時点における最新版
MainActivity.kt
Log.i("MainActivity", "freesize=" + FileStorage(this).getFreeMB()) // freesize=40121.0
FileStorage.kt
package com.example.sampleapplication
import android.content.Context
import android.os.Build
import android.os.Environment
import androidx.annotation.RequiresApi
class FileStorage(private var context: Context) {
fun getFreeMB(): Double {
var freeByteSize: Double = 0.0
val state = Environment.getExternalStorageState()
// 外部保存領域が使用可能かチェック
if (Environment.MEDIA_MOUNTED == state || Environment.MEDIA_MOUNTED_READ_ONLY == state) {
var path = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
context.getExternalFilesDir(Environment.DIRECTORY_DOCUMENTS)
} else {
TODO("VERSION.SDK_INT < KITKAT")
}
// 空きMBを返す
freeByteSize = Math.floor((path!!.freeSpace / 1024 / 1024).toDouble())
}
return freeByteSize
}
}
参考：http://truthfullscore.hatenablog.com/entry/2014/01/07/121157
