Android写本地文件

Android写本地文件

• 通过FileWriter

 	private static final String LOG_DIR =  "sdcard/log/";
    public static void write(String log) {
        FileWriter fileWriter;
        Date date = new Date();
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS", Locale.getDefault());
        String dateStr = simpleDateFormat.format(date);
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());
        String fileName = LOG_DIR + dateFormat.format(date) + ".txt ";
        try {
            fileWriter = new FileWriter(fileName, true);
            fileWriter.write(dateStr + "：" + log + "\r\n");
            fileWriter.flush();
            fileWriter.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

• 通过FileOutputStream

	public static void write(String message) {
		FileOutputStream fos = null;
		try {
		    fos = openFileOutput("sdcard/example.txt", Context.MODE_PRIVATE);
		    fos.write(message.getBytes());
		    fos.close();
		} catch (FileNotFoundException e) {
		    e.printStackTrace();
		} catch (IOException e) {
		    e.printStackTrace();
		}
	}