「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
(ページの作成:「MainActivity.kt <pre> if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { Log.i("MainActivity", "freesize=" + FileStorage(this).getFreeMB()) // freesize=40121....」) |
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(同じ利用者による、間の1版が非表示) | |||
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()) | ||
行29: | 行30: | ||
} | } | ||
</pre> | </pre> | ||
+ | |||
+ | 参考:http://truthfullscore.hatenablog.com/entry/2014/01/07/121157 |
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