? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 /** * 循环录像，当内存卡容量少于300M时，自动删除视频列表里面的第一个文件 */ private void xunhuanluxiang() { if (Environment.getExternalStorageState().equals( Environment.MEDIA_MOUNTED)) { File path = Environment.getExternalStorageDirectory(); // 取得sdcard文件路径 StatFs statfs = new StatFs(path.getPath()); // 获取block的SIZE long blocSize = statfs.getBlockSize(); // 获取BLOCK数量 long totalBlocks = statfs.getBlockCount(); // 己使用的Block的数量 long availaBlock = statfs.getAvailableBlocks(); // 获取当前可用内存容量，单位：MB long sd = availaBlock * blocSize / 1024 / 1024; if (sd < 300) { String filepath = (Environment.getExternalStorageDirectory() .getAbsolutePath() + "/video/"); File file = new File(filepath); if (!file.exists()) { file.mkdirs(); } File[] files = file.listFiles(); if (files.length > 0) { String childFile[] = file.list(); String dele = (filepath + childFile[0]); File file2 = new File(dele); file2.delete(); } } } else if (Environment.getExternalStorageState().equals( Environment.MEDIA_REMOVED)) { Toast.makeText(this, "请插入内存卡", Toast.LENGTH_SHORT).show(); } }