Android 判斷SD卡是否存在及容量

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首先要在AndroidManifest.xml中添加SD卡存取權限

<!-- 在SDCard中建立與刪除檔案許可權 -->  <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>  <!-- 往SDCard寫入資料許可權 -->  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>   

    //SD是否存在    private boolean ExistSDCard() {        if (Environment.getExternalStorageState().equals(                Environment.MEDIA_MOUNTED)) {            return true;            } else                 return false;    }    //SD剩餘空間    public long getSDFreeSize(){           //取得SD卡檔案路徑           File path = Environment.getExternalStorageDirectory();            StatFs sf = new StatFs(path.getPath());            //擷取單個資料區塊的大小(Byte)           long blockSize = sf.getBlockSize();            //閒置資料區塊的數量           long freeBlocks = sf.getAvailableBlocks();           //返回SD卡空閑大小           //return freeBlocks * blockSize;  //單位Byte           //return (freeBlocks * blockSize)/1024;   //單位KB           return (freeBlocks * blockSize)/1024 /1024; //單位MB      }    //SD總容量    public long getSDAllSize(){        //取得SD卡檔案路徑         File path = Environment.getExternalStorageDirectory();        StatFs sf = new StatFs(path.getPath());        //擷取單個資料區塊的大小(Byte)        long blockSize = sf.getBlockSize();        //擷取所有資料區塊數         long allBlocks = sf.getBlockCount();        //返回SD卡大小         //return allBlocks * blockSize; //單位Byte        //return (allBlocks * blockSize)/1024; //單位KB        return (allBlocks * blockSize)/1024/1024; //單位MB    }

 

Android 判斷SD卡是否存在及容量