获取Android手机中SD卡内存信息
访问sdcard的权限：
[java]
1. <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
[java]
1. btn.setOnClickListener(new View.OnClickListener() {
2.
3.
4. @Override
5. public void onClick(View v) {
6. if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
7. //取得sdcard文件路径
8. File path = Environment.getExternalStorageDirectory(); // "mnt/sdcard"
9. path = new File("mnt/extsd");
10. Log.i("chens", "======path========"+path);
11. StatFs statfs = new StatFs(path.getPath());
12.
13. //获取block的SIZE
14. long blocSize = statfs.getBlockSize();
15.
16. //获取BLOCK数量
17. long totalBlocks = statfs.getBlockCount();
18.
19. //空闲的Block的数量
20. long availaBlock = statfs.getAvailableBlocks();
21.
22. //计算总空间大小和空闲的空间大小
23. String[] total = filesize(totalBlocks * blocSize);
24. String[] availale = filesize(availaBlock * blocSize);
25.
26. Toast.makeText(FirstActivity.this, "sdcard总空间大小="+total[0]+total[1]
27. +"\n剩余空间大小="+availale[0]+availale[1], 1).show();
28. }else {
29. Toast.makeText(FirstActivity.this, "没有sdcard或者sdcard挂载失败", 1).show();
30. }
31.
32.
33.
34.
35.
36. }
37. });
38. }
[java]
1. //计算空间方法csize
2. String[] filesize(long size) {
3. String str = "";
4. if (size >= 1024) {
5. str = "KB";
6. size /= 1024;
7. if (size >= 1024) {
8. str = "MB";
9. size /= 1024;
10. } www.zzzyk.com
11. }
12. DecimalFormat formatter = new DecimalFormat();
13. formatter.setGroupingSize(3);
14. String result[] = new String[2];
15. result[0] = formatter.format(size);
16. result[1] = str;
17. return result;
18. }
补充：移动开发 , Android ,
