Start from scratch to learn how to build and create a project in the Xamarin. Forms (2) Environment, xamarin. forms

Start from scratch to learn how to build and create a project in the Xamarin. Forms (2) Environment, xamarin. forms
I. Build an environment in Windows: 1. download and install jdk, Android SDK, and NDK. Of course, you also need VS2013 update 2 (both VS2010 and VS2012) and later.. latest SDK,: http://dl.google.com/android/android-sdk_r23-windows.zip B. android platform Toolkit (decompress to the SDK installation root directory, generate the folder platform-tools),: https://dl-ssl.google.com/android/repository/platform-tools_r20-windows.zip c. tools (decompress to the SDK installation root directory, generate the folder tools),: https://dl-ssl.google.com/android/repository/tools_r23-windows.zip d. build-tools (decompress to the SDK installation root directory, change the folder name "android-4.4.2" to "build-tools"),: https://dl-ssl.google.com/android/repository/build-tools_r19.1-windows.zip (20 problems, so use 19.1) e. platforms (for Android platforms of various versions, create a folder platforms under the SDK installation root directory, decompress it to platforms, and change the folder name "android-4.4.2" to "android-19 "),: https://dl-ssl.google.com/android/repository/android-19_r03.zip I used this version 4.4.2, corresponding to sdkint 19f. system-images (Android system image, create the system-images folder under the root directory of SDK installation, enter system-images, create the android-19 folder, and decompress the compressed file to this directory): http://dl-ssl.google.com/android/repository/sysimg_armv7a-19_r02.zip if you think the top is more complex, then directly download

Http://dl.google.com/android/adt/adt-bundle-windows-x86_64-20140702.zip (64-bit), http://dl.google.com/android/adt/adt-bundle-windows-x86-20140702.zip (32-bit), which contains the complete sdk, also contains Eclipse. After decompression, the sdk folder contains all the required content.
The final folder structure in the SDK is as follows:

G. Latest NDK,: http://dl.google.com/android/ndk/android-ndk-r9d-windows-x86_64.zip
2. Download Xamarin. VisualStudio, which can be installed online from the official website or the offline installation package 3.0.54. 3. download and run the installation program. Follow the prompts to install it step by step. Mac environment setup: official online Installation
2. Create an Xamarin. Forms project
1. Create a project and select "Blank App (Xamarin. Forms Portable )"

After the project is created, the project structure is as follows:

2. Update the Assembly because the default Xamarin. Forms version is 1.0.6186, you need to update the Assembly. There are two ways to update an assembly: a. Right-click "Reference", select "manage NuGet package", and search "Xamarin Forms"
For Android, "Xamarin Support Library v4" can be updated in the Android project ".




B. Use the Nuget Console (in this way, the previous Assembly package will be deleted)
Input: Update-Package Xamarin. Forms


3. Configure the Android SDK path and find Xamarin in tools-Options,
Select the path of the previously installed Android SDK and NDK.


4. Create an Android simulator. Click the icon in the red box to open the Android simulator management tool and click "New ..."

Set related parameters and click OK.
Click Start to Start the simulator.
In solution, set Android as the startup Item and click Start.

I want to engage in electrical design of the Power Distribution Cabinet, which involves the first and second aspects. What is the best book to learn the second principle from scratch?

Electric and electrical equipment installation books, electrical design books, large bookstores. Understand the performance of various electrical components, standards of relevant countries and industries, and the field working conditions of electrical equipment. You must master the electrical knowledge of the system to design the system.

Erhu guide, recommended from scratch

Meng Xiande's "Erhu getting started" is very good ~~
Learn about erhu, remember,
Be sure to read it in one sentence,
Otherwise, it will not grow.

It is recommended to find a teacher to make progress faster. Hope to adopt