随笔分类 -  写代码

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Dex动态加载
摘要：Dex动态加载是为了解决什么问题？ 在Android系统中，一个App的所有代码都在一个Dex文件里面。 Dex是一个类似Jar的存储了多个Java编译字节码的归档文件。 因为Android系统使用Dalvik虚拟机，所以需要把使用Java Compiler编译之后的class文件转换成Dalvik 阅读全文
posted @ 2016-03-17 19:34 Mosthink 阅读(662) 评论(0) 推荐(0)
ListView滑动位置精准记忆
摘要：需求场景：一个ListView页面，滑动阅读到某一位置，然后退出页面，下次再进入页面的时候，想要直接滑动到上次阅读的位置。 方案1：页面退出的时候，ListView.getFirstVisiblePosition()来获取当前可见的第一个Item的position并记录，下次再进入页面的时候通过Li 阅读全文
posted @ 2016-03-17 19:33 Mosthink 阅读(406) 评论(0) 推荐(0)
2 GPS utility methods
摘要：Methond 1 is to check whether the GPS is on: Method 2 is to open GPS setting page in Android device: Codes in Github : https://gist.github.com/Viyu/94 阅读全文
posted @ 2016-03-17 19:32 Mosthink 阅读(147) 评论(0) 推荐(0)
PingUtil in Android
摘要：Ping a host in Android:“ping -c 1 127.0.0.1”-c 1: The ping times. Ping codes is simple, but:1, you must run it in background thread since Process.wait 阅读全文
posted @ 2016-03-17 19:31 Mosthink 阅读(280) 评论(0) 推荐(0)
Android客户端的图形化拖放操作的设计实现
摘要：为什么要拖放？拖放在某些UI交互中可以简化用户操作。 拖放的步骤包括哪些？“Drag and Drop”，拖放，顾名思义，总共就分三步：1， 开始拖起来；2， 正在拖；3， 放下，进行操作；在这三步里，贯穿的是数据的传输，从拖的地方传输到放的地方。 现在，我们就以一个简单的拖放删除笔记的App来讲解 阅读全文
posted @ 2016-03-17 19:30 Mosthink 阅读(445) 评论(0) 推荐(0)
LED notification in Android device
摘要：Code can control the LED notification in Android device, using android.app.Notification: ledARGB: The color of the led. The hardware will do its best 阅读全文
posted @ 2016-03-17 19:29 Mosthink 阅读(268) 评论(0) 推荐(0)
How to tile small texture image onto page as its background
摘要：You don’t need to set a big size image as the background of pages if the image is texture or uniform color. How to tile small texture image onto big p 阅读全文
posted @ 2016-03-17 19:28 Mosthink 阅读(124) 评论(0) 推荐(0)
The Adapter of ListView: Just adapt data to view, don’t do anything else
摘要：The design of SimpleAdapter is not good in my opinion. An adapter should just adapter the data to view, not care to inflate xml to create Layout View, 阅读全文
posted @ 2016-03-17 19:26 Mosthink 阅读(142) 评论(0) 推荐(0)
Implement a TextView with an animation in its left side
摘要：In my case, I want to write a TextView with an animation in its left side. ImageView + TextView could work but it’s not frugal enough. TextView with d 阅读全文
posted @ 2016-03-17 19:26 Mosthink 阅读(125) 评论(0) 推荐(0)
Shape + Selector: Make a Shape as one item of the Selector
摘要：Generally, I use a selector to select pictures or colors to render the normal and the pressed background for View. And use a Shape to draw a fixed bac 阅读全文
posted @ 2016-03-17 19:25 Mosthink 阅读(248) 评论(0) 推荐(0)
Units Problem: How to read text size as custom attr from xml and set it to TextView in java code
摘要：Here is this topic’s background: I defined a custom View which extends FrameLayout and contains a TextView, calledMyView here. And I defined custom at 阅读全文
posted @ 2016-03-17 19:24 Mosthink 阅读(151) 评论(0) 推荐(0)

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