sync notes android

Android learning notes-TextView (text box) (1), android-textviewReference from: http://www.runoob.com/w3cnote/android-tutorial-textview.html 1. Basic attributes: Id:Set a component id for TextView. Based on the id, we can get this object through the findViewById () method in Java code, set relevant properties, or use

Document directory Preface Body End Preface In the previous section, we used a demo to familiarize ourselves with the basic use of Eclipse, how to run it in simulators and mobile phones, and how to package it into an APK, but did not write the code in detail, I believe many of you can't afford it anymore. In this section, we will write code to familiarize ourselves with the situation of Android SDK and some java features.Statement This series of

incorrect or there is no match. Open the Android.mk file under the Jni folder for the current project, which is the configuration file that is used by C/s + + compile, and we can see that the path to opencv.mk must be under the OPENCV_ANDROID_SDK directory, or in the same directory as the current project file: so the solution to this problem is to add a opencv_android_sdk path configuration constant on the environment page of the C + + build:Third, the case operation:after all of the above conf

Download and compile the source code--fourth chapter reading notes and ExperienceRead the book to learn the difference between Android source code and Linux source code, and understand what Android porting is. Knowing that the Android migration is the Linux kernel porting, and the Linux kernel porting is mainly Linux d

, and then tick Enabel project specific settings selected. Then select the factory Path under annotation processing:Also tick Enabel project specific settings, then click Add JARs, add the jar under Compile-lib under the folder, then apply, then OK. This will enable the use of this Android annotations open source jar package.The following is a simple explanation of how and how to use the effect, you can compare with your original

[Android Notes] use of ExpandableListView, Android listview Effect: Expanded ListView In fact, there is no difference with the normal ListView, but the ListView is changed to ExpandableListView, And the adapter is changed from BaseAdapter to BaseExpandableListAdapter. Steps: 1. Write the layout file. There are three types: Master Layout, group layout, and g

environment for the Android NDKAndroid NDK needs to have Android SDK to use, it is not a standalone application. This environment is easier to build than the Android SDK.4. Install cross-compilation environmentThe CPU of the X86 architecture employs a complex instruction set computer, and the CPU of the ARM architecture uses a thin instruction set computer. In o

[Android Notes] flattened ProgressBar ----- ProgressWheel, Android flat ProgressWheel is an open-source project on github. It provides developers with a flat ProgressBar and supports in-depth customization. The effect is as follows: The following describes how to use it: 1. The following is the source code of ProgressWheel, copied to the project. Package com. ex

Android notes. Getting started with Service components (1). What is Service ?, Android. serviceReprinted please indicate Source: http://blog.csdn.net/u012637501 (embedded _ small J of the sky)I. Service1. Service IntroductionThe Service is one of the four Android components. Similar to the Activity component, the Servi

"Android Development Art Exploration" reading notes (ix)--Four componentsNO1:The internal storage structure of Message Queuing MessageQueue is not a real queue, but rather a single-linked list of data structures to store message lists, because single-linked lists have advantages over insertions and deletionsNo2:ThreadLocal can store and provide data in different threads with no interference , and the looper

Android Development notes -- pull-down refresh and pull-up loading for open-source components PullToRefresh (one-minute processing, super simple) and Android pulltorefresh Preface Previously, when we implemented ListView pull-down refresh and pull-up to load data, we inherited some native ListView methods to rewrite it, which was very complicated to implement, we

Configuring the Android source code download Environment step Create a directory to hold the download script file (repo) #mkdir ~/bin#PATH =~/bin/repo Download Repo script file #curl Https://dl-ssl.google.com/dl/googlesource/git-repo/repo >~bin/repo#chmod A+x~/bin/repo Create a directory for Android source code #mkdir Android_source#cd Android_source Initia

Android learning notes (1) Wake up, android wake up The time passed quickly. in the twinkling of an eye, it almost passed 2015 in 1/4, this year. net News is nothing more. net is open-source, visual studio is free, and net is really cross-platform. visual studio can be used for android development and IOS development!

identity limit test to test only one variant, or even one Test class:The variant is still built, but only the specified one, and only the tests inside the Exampleunittest class are run.You can also choose to right-click the test and run it inside Android studio. But it's only for the current variant, providing a nice result to show:The only problem is that it doesn't run anything meaningful. That's the point. When using JUnit support, you can't test

"Android Development Art Exploration" reading notes (10)--android message mechanismNO1:There are a lot of roles in Android that can play threading, such as Asynctask, Intentservice, Handlerthread.The asynctask layer encapsulates the thread pool and handler, primarily for the convenience of developers updating the UI in

configuration information, software-related external memory.Sharedpreferences provides a series of read and write operations to external files.The Sharedpreferences internal interface Editor provides methods for writing and purging data.The sharedpreferences itself is an interface that cannot be used to generate its objects using the new method, and forcing the new method to generate its objects is written in the form of an inner class. Use Context.getsharedpreferences (); Get object.The contex

Android Study Notes (34): Android menu Android menus are divided into three types: Option Menu, Context Menu, and Sub Menu ). Option Menu: Click the Menu button on the device to display the Menu. You cannot select a flag. Context Menu: a Menu that appears when a component is long pressed. Menu item icons are not suppor

/android" Package= "com.assets.cn"Android:versioncode= "1"Android:versionname= "1.0"> USES-SDKandroid:minsdkversion= "8" /> ApplicationAndroid:icon= "@drawable/icon"Android:label= "@string/app_name"> ActivityAndroid:name=". Assetsdemoactivity "Android:label= "@string/app_name"> Intent-filter> ActionAndroid:name= "Android.intent.action.MAIN" /> categoryAndroid:name= "Android.intent.category.LAUNCHER

[Android Notes] IntentService source code analysis, Android intentserviceThe Service components must be familiar. Note that the Service component runs in the UI thread by default, so it also blocks the main thread. during use, remember not to perform time-consuming operations in the Service. Instead, you should create sub-threads and execute them asynchronously.T

to sign the APK, but using Gradle is easier. Such as:You may not want to tell the password hard-coded to the build file, you can put them in the Gradle.properties file or set it on the command line.In the DSL document, the Signingconfigs block is delegated to the Signingconfig class, which has four commonly used properties:Keyalias: This value is used when Keytool signs a specific keyKeypassword: The password of the key used in the signing processStoreFile: Disk file containing keys and certifi