Android的图像浏览类支持捏缩放和滚动 [英] Android ImageViewer class supporting Pinch-Zoom and Scrolling

问题描述

我在寻找，在我的应用程序对于一个给定的URI（已经存储在我的应用程序在一个安全的地方通过Web服务获取的影像）打开一个图像的图像浏览库。我真的很喜欢三星Galaxy S图像浏览-活动，因为它使用捏变焦和滚动垂直/水平。此外，它缩放图片速度非常快在我的三星手机：）

I am searching an ImageViewer library that opens an image in my application for a given URI (the image fetched by a webservice is already stored within my application in a secured place). I really like the "Samsung Galaxy S" ImageViewer-Activity because it uses pinch-zoom and "scrolling" vertical/horizontal. Also it scales the picture very fast on my samsung phone :)

我知道，我可以像这样的意图打开一个图像：

I know that I can open an image with an intent like this:

Intent i = new Intent(Intent.ACTION_VIEW);  
i.setDataAndType(uri, "image/*");
startActivity(i);

最适合的浏览器被称为，当没有找到一个ActivityNotFoundException提高。所以，这就是酷！

The best suitable viewer is being called, when none is found an ActivityNotFoundException is raised. So thats cool!

但问题是，我不能与外部意图（出于安全目的），打开一个图像。即：用户应该不会有posibility通过菜单选项保存打开的图像，以他的外置SD卡或发送此图片到其他服务（电子邮件/ Twitter或左右）。所以，我写我自己的图像浏览级（活动），只能在我的应用程序被称为... 可惜我不是很熟练变换图像，因此没有任何开源项目（或库）覆盖该用例？

But the problem is that I am not allowed to open an image with an external intent (for security purposes). i.e: The user should not have the posibility to save the opened image via a menu option to his external sd-card or send this picture to another service (email/twitter or s.o.). So I have to write my own ImageViewer-Class (Activity) that can only be called within my application... Unfortunately I am not very skilled transforming images, so is there any open source project (or library) that covers this use case?

我已经要求谷歌，发现这个 HTTP：//$c$c.google.com/ P / Android的捏/ 但它没有很好地工作（也它没有滚动功能）。

I already asked google and found this one http://code.google.com/p/android-pinch/ but it didnt work very well (also it has no scroll-functionality).

感谢您的建议：）

推荐答案

要处理图像的最简单方法是使用的WebView ，如果图像存储本地或某处在线。的WebView支持捏放大等功能。

The easiest way to handle images is using a WebView, if the image is stored local or somewhere online. WebView supports pinch to zoom and other functions.

Java的例子：

String imageUrl = "file:///local/dir/image.jpg"; // http://example.com/image.jpg
WebView wv = (WebView) findViewById(R.id.yourwebview);
wv.getSettings().setBuiltInZoomControls(true);
wv.loadUrl(imageUrl);

XML源代码：

XML source:

<WebView android:id="@+id/yourwebview"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent" />

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