android 获取手机内存及 内存可用空间的方法

//1.获取内存可用大小,内存路径  String path=Environment.getDataDirectory().getAbsolutePath();  String memoryAvaliSpace= Formatter.formatFileSize(this,getAvailSpace(path));  //2.获取sd卡可用大小，sd卡路径  String sdPath=Environment.getExternalStorageDirectory().getAbsolutePath();  String sdAvaliSpace= Formatter.formatFileSize(this,getAvailSpace(sdPath));private long getAvailSpace(String path) {  //获取可用内存大小  StatFs statfs=new StatFs(path);  //获取可用区块的个数  long count=statfs.getAvailableBlocks();  //获取区块大小  long size=statfs.getBlockSize();  //可用空间总大小  return count*size; }