Android 读取txt文档

Android 读取txt文档

<pre name="code" class="java">/***
	 * 将文本文件中的内容读成字符串
	 * ***/
	private String getTextString(String pathandname, String code) {
		String str = "";

		try {
			FileInputStream fis = new FileInputStream(pathandname);

			int size = fis.available();

			byte[] buffer = new byte[size];

			fis.read(buffer);

			fis.close();

			str = new String(buffer, code);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		return str;
	}

	/****
	 * 无法确切的判断出文档的编码是gbk或者是gb2312 获取指定文档的编码方式
	 * ***/
	public static String getCode(String filepath) {

		File file = new File(filepath);
		System.out.println(file.exists() + "," + file.getAbsolutePath());

		String code = "";

		try {
			FileInputStream fis = new FileInputStream(file);
			BufferedInputStream in = new BufferedInputStream(fis);
			in.mark(4);
			byte[] first3bytes = new byte[3];
			in.read(first3bytes);// 找到文档的前三个字节并自动判断文档类型。
			in.reset();
			if (first3bytes[0] == (byte) 0xEF && first3bytes[1] == (byte) 0xBB
					&& first3bytes[2] == (byte) 0xBF) {// utf-8
				code = "utf-8";
			} else if (first3bytes[0] == (byte) 0xFF
					&& first3bytes[1] == (byte) 0xFE) {
				code = "unicode";
			} else if (first3bytes[0] == (byte) 0xFE
					&& first3bytes[1] == (byte) 0xFF) {
				code = "utf-16be";
			} else if (first3bytes[0] == (byte) 0xFF
					&& first3bytes[1] == (byte) 0xFF) {
				code = "utf-16le";
			} else {
				// 无法确切判断出gb2312的编码code = "GB2312";
				code = "utf-8";

			}
			in.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return code;

	}