day02_07获取sd卡剩余容量
........................\.classpath
........................\.project
........................\.settings
........................\.........\org.eclipse.jdt.core.prefs
........................\AndroidManifest.xml
........................\assets
........................\bin
........................\...\AndroidManifest.xml
........................\...\classes
........................\...\classes.dex
........................\...\.......\com
........................\...\.......\...\itheima
........................\...\.......\...\.......\sdavail
........................\...\.......\...\.......\.......\BuildConfig.class
........................\...\.......\...\.......\.......\MainActivity.class
........................\...\.......\...\.......\.......\R$attr.class
........................\...\.......\...\.......\.......\R$dimen.class
........................\...\.......\...\.......\.......\R$drawable.class
........................\...\.......\...\.......\.......\R$id.class
........................\...\.......\...\.......\.......\R$layout.class
........................\...\.......\...\.......\.......\R$menu.class
........................\...\.......\...\.......\.......\R$string.class
........................\...\.......\...\.......\.......\R$style.class
........................\...\.......\...\.......\.......\R.class
........................\...\day02_07.apk
........................\...\dexedLibs
........................\...\.........\android-support-v4-cfca7ff0764f335e169b2f047b5265a3.jar
........................\...\jarlist.cache
........................\...\res
........................\...\resources.ap_
........................\...\...\drawable-hdpi
........................\...\...\.............\ic_launcher.png
........................\...\...\drawable-mdpi
........................\...\...\.............\ic_launcher.png
........................\...\...\drawable-xhdpi
........................\...\...\..............\ic_launcher.png
........................\...\...\drawable-xxhdpi
........................\...\...\...............\ic_launcher.png
........................\gen
........................\...\com
........................\...\...\itheima
........................\...\...\.......\sdavail
........................\...\...\.......\.......\BuildConfig.java
........................\...\...\.......\.......\R.java
........................\ic_launcher-web.png
........................\libs
........................\....\android-support-v4.jar
........................\proguard-project.txt
........................\project.properties
........................\res
........................\...\drawable-hdpi
........................\...\.............\ic_launcher.png
........................\...\drawable-ldpi
........................\...\drawable-mdpi
........................\...\.............\ic_launcher.png
........................\...\drawable-xhdpi
........................\...\..............\ic_launcher.png
........................\...\drawable-xxhdpi
........................\...\...............\ic_launcher.png
........................\...\layout
........................\...\......\activity_main.xml
........................\...\menu
........................\...\....\main.xml
........................\...\values
........................\...\values-sw600dp
........................\...\..............\dimens.xml
........................\...\values-sw720dp-land
........................\...\...................\dimens.xml
........................\...\values-v11
........................\...\..........\styles.xml
........................\...\values-v14
........................\...\..........\styles.xml
........................\...\......\dimens.xml
........................\...\......\strings.xml
........................\...\......\styles.xml
........................\src
........................\...\com
........................\...\...\itheima
........................\...\...\.......\sdavail
........................\...\...\.......\.......\MainActivity.java