Android学习笔记1-1--数据1--File

I/O

更具体的信息参考Java File学习笔记。

// 判断是否有SD卡Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)Environment.getRootDirectory() = /systemEnvironment.getDataDirectory() = /dataEnvironment.getDownloadCacheDirectory() = /cacheEnvironment.getExternalStorageDirectory() = /mnt/sdcardEnvironment.getExternalStoragePublicDirectory(“test”) = /mnt/sdcard/testgetPackageCodePath() = /data/app/com.my.app-1.apkgetPackageResourcePath() = /data/app/com.my.app-1.apkgetDatabasePath(“test”) = /data/data/com.my.app/databases/testgetCacheDir() = /data/data/com.my.app/cachegetFilesDir() = /data/data/com.my.app/filesgetDir(“test”, Context.MODE_PRIVATE) = /data/data/com.my.app/app_testgetExternalCacheDir() = /mnt/sdcard/Android/data/com.my.app/cachegetExternalFilesDir(“test”) = /mnt/sdcard/Android/data/com.my.app/files/testgetExternalFilesDir(null) = /mnt/sdcard/Android/data/com.my.app/files