Android_OTT的update升级包版本信息的读取

android设备在用U盘升级的时候，要先判断U盘中的升级包是否匹配此机型，是否高于当前版本。如果这些都成立的话，那么才刷机。这里我列出一个读取U盘版本信息的例子，只要运用了ZipInputStream  ZipEntry 。 

  public String getUdiskVersion() {

		Log.e(TAG, "--> getUdiskVersion()");
		String zipFile = "mnt/udisk/usb/USB_DISK0/udisk0/update.zip";
		File f = new File(zipFile) ;
		if(!f.exists()){
			return "" ;
		}
		FileInputStream fis = null;
		try {
			fis = new FileInputStream(f);
		} catch (FileNotFoundException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
		BufferedReader reader = null;
		String str = "";
		String version = "";
		ZipEntry ze = null;
		ZipInputStream zis = null;

		try {
			zis = new ZipInputStream(fis);
			while ((ze = zis.getNextEntry()) != null) {
				if (ze.getName().equals("system/build.prop")) {
					Log.e(TAG, "找到了" + "路径是：" + ze.getName());
					break;
				}
			}
			
			reader = new BufferedReader(new InputStreamReader(zis, "GBK"));
			while ((str = reader.readLine()) != null) {
				if (str.startsWith("ro.product.model")) {
					version = str.substring(str.indexOf('=') + 1);
					Toast.makeText(this, version, 0);
					Log.e(TAG, "--> str = " + str);
				}
			}
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				reader.close();
				ze.clone();
				zis.close();
				fis.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return version;
	}