Android开发 判断SD卡是否存在及容量的相关查询方法

访问权限添加:

<!-- 在SDCard中创建与删除文件权限 --><uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"><!-- 往SDCard写入数据权限 --><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE">  }</uses-permission></uses-permission>

判断sd卡是否存在:

private boolean ExistSDCard() { if (android.os.Environment.getExternalStorageState().equals( android.os.Environment.MEDIA_MOUNTED)) { return true; } else return false; }

sd卡剩余空间查询:

public long getSDFreeSize(){ //取得SD卡文件路径 File path = Environment.getExternalStorageDirectory(); StatFs sf = new StatFs(path.getPath()); //获取单个数据块的大小(Byte) long blockSize = sf.getBlockSize(); //空闲的数据块的数量 long freeBlocks = sf.getAvailableBlocks(); //返回SD卡空闲大小 //return freeBlocks * blockSize; //单位Byte //return (freeBlocks * blockSize)/1024; //单位KB return (freeBlocks * blockSize)/1024 /1024; //单位MB }

sd卡总容量查询:

public long getSDAllSize(){ //取得SD卡文件路径 File path = Environment.getExternalStorageDirectory(); StatFs sf = new StatFs(path.getPath()); //获取单个数据块的大小(Byte) long blockSize = sf.getBlockSize(); //获取所有数据块数 long allBlocks = sf.getBlockCount(); //返回SD卡大小 //return allBlocks * blockSize; //单位Byte //return (allBlocks * blockSize)/1024; //单位KB return (allBlocks * blockSize)/1024/1024; //单位MB }

转载自:http://blog.csdn.net/xinzheng_wang/article/details/7827775