sd卡相关Environment.getExternalStorageDirectory() ?获取sd卡目录??配置文件：?uses-permission android
sd卡相关
Environment.getExternalStorageDirectory() ?获取sd卡目录
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配置文件：
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<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>