获取手机外部存储卡的剩余空间
private void showSize()
? {
??? /* 将TextView及ProgressBar设定为空值及0 */
??? myTextView.setText(""); myProgressBar.setProgress(0);
??? /* 判断记忆卡是否插入 */
??? if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
??? {
????? /* 取得SD CARD档案路径一般是/sdcard */
????? File path = Environment.getExternalStorageDirectory();
????? /* StatFs看文件系统空间使用状况 */
????? StatFs statFs = new StatFs(path.getPath());
????? /* Block的size */
????? long blockSize = statFs.getBlockSize();
????? /* 总Block数量 */
????? long totalBlocks = statFs.getBlockCount();
????? /* 已使用的Block数量 */
????? long availableBlocks = statFs.getAvailableBlocks();
????? String[] total = fileSize(totalBlocks * blockSize);
????? String[] available = fileSize(availableBlocks * blockSize);
????? /* getMax取得在main.xml里ProgressBar设定的最大值 */
????? int ss = Integer.parseInt(available[0]) * myProgressBar.getMax() / Integer.parseInt(total[0]);
????? myProgressBar.setProgress(ss);
????? String text = "总共" + total[0] + total[1] + "\n"; text += "可用" + available[0] + available[1];
????? myTextView.setText(text); }
??? else if (Environment.getExternalStorageState().equals( Environment.MEDIA_REMOVED))
??? {
????? String text = "SD CARD已移除"; myTextView.setText(text);
????? }
??? }
? /* 回传为字符串数组[0]为大小[1]为单位KB或MB */
? private String[] fileSize(long size)
? {
??? String str = "";
??? if (size >= 1024)
??? {
????? str = "KB";
????? size /= 1024;
????? if (size >= 1024)
????? {
??????? str = "MB";
??????? size /= 1024;
??????? }
????? }
??? DecimalFormat formatter = new DecimalFormat();
??? /* 每3个数字用,分隔如：1,000 */
??? formatter.setGroupingSize(3);
??? String result[] = new String[2];
??? result[0] = formatter.format(size);
??? result[1] = str; return result;
??? }
