Android book Reader[Use SimpleOnGestureListener ]

最新推荐文章于 2025-08-21 17:21:55 发布

原创最新推荐文章于 2025-08-21 17:21:55 发布 · 166 阅读

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本文介绍了一种快速高效地在阅读页面中通过输入页码进行页面跳转的方法，并支持自定义字体和字号，同时支持本地磁盘搜索。通过使用特定的监听器和手势检测器实现页面的平滑切换，确保只加载显示所需页面的内容，提升用户体验。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

1.Support drug to change page, go to any page by input page number.

2.Support define page font, page content size.

3.Support local drive search.

Advantage:

Fast,Only load the content need the show on page.

CODE:

extend the listener

		super.onCreate(savedInstanceState);
		mGestureDetector = new GestureDetector(new MyGestureDetector());//use a detector
		context = this;
		setContentView(R.layout.readpage);
.......


class MyGestureDetector extends SimpleOnGestureListener {

		@Override
		public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
				float velocityY) {
			Log.d("ReadPageActivity---", "fling");
			int dx = (int) (e2.getX() - e1.getX());
			// don't accept the fling if it's too short
			// as it may conflict with a button push
			if (Math.abs(dx) > 3 && Math.abs(velocityX) > Math.abs(velocityY)) {
				if (velocityX > 0) {
					Log.d("ReadPageActivity---", "move to the rights");
					if (page != 0) {
						page--;
						gotoNextPage();
					}

				} else {
					Log.d("ReadPageActivity---", "move to the left");
					page++;
					gotoNextPage();
				}
				return true;
			} else {
				return false;
			}
		}

Load the text content:

			char[] chardata = new char[CONTENT_LENGTH];
			FileInputStream fin = new FileInputStream(textfile);
			InputStreamReader sreader = new InputStreamReader(fin, CODE_SIMPLECHINIESE);
			BufferedReader bufferReader = new BufferedReader(sreader);
			bufferReader.skip(new Long(page * CONTENT_LENGTH).longValue());
			bufferReader.read(chardata);
			tale = new String(chardata);