Android获取SD卡路径方法

public String getSDPath(){
File sdDir = null;
//判断sd卡是否存在
boolean sdCardExist = Environment.getExternalStorageState()
.equals(android.os.Environment.MEDIA_MOUNTED);
if(sdCardExist){
//获取根目录
sdDir = Environment.getExternalStorageDirectory();
}
return sdDir.toString();
}