.
Therefore, android must select Linux as the kernel without any other options.
The answer is because @ pansz, which has the most likes, is the answer.
On the contrary, the most difficult part of linux is its kernel. as a person who has written m-type device drivers in n open-source or non-open-source embedded systems, I would like to say that the difficulty of writing the device drivers is absolutely wire-level.
Second, embedded devices do not nee
BKJIA: when you plan to develop your first Android Application, a large list of tools may be the first obstacle to us. However, the process of downloading and preparing the Android development environment is not complicated, thanks to the convenient integrated software bundle, it can help you use most of the tools you may need at any time, even if not all.
The disadvantage of downloading and using this sing
This document describes how to use the Google Map service. Main reference source: https://developers.google.com/maps/documentation/android/start? Hl = zh-CN. It still takes a long time to connect the simulator and the actual mobile phone. Latest GoogleMaps Android API v2 has integrated the map service into
that integrate the top-layer Linux code.
Dalvik:
Another important part of Android is virtual machines and a set of important runtime environments. It is a very clever design and is a very good underlying application of a mobile phone terminal.
How to generate code?
The Dalvik Virtual Machine only executes. dex executable files. After the Java program is compiled, it must be converted to the. dex format by using the tools in the SDK before it can b
Before use
Google Maps bring great convenience to people's lives. For example, google maps can be used to search for merchant information, view maps, and obtain vehicle routes. The android platform also provides a map package (com
Before use
Google Maps bring great convenience to people's lives. For example, Google maps can be used to search for merchant information, view maps, and obtain vehicle routes. The Android platform also provides a map package (COM
has also been a painting of the iPad using the Android mobile phone tethering to access the Internet.
4. browser upgrade
Google said that Android 2.2's built-in browser is the world's fastest mobile device browser, improving JavaScript performance by 2-3 times. At the same time, the positioning function of Google
some analysts is that Google, after entering the mobile phone market, does not know what kind of cooperation has been achieved with a partner like Samsung-previously, samsung has pre-installed Google search, maps, Gmail, and other software on its mobile phone. If Google is a mobile phone, it is likely that its partner
. to reduce the interaction of keystrokes and visuals, it is possible Speech Recognition the application will be greatly enhanced. In addition, the Android Wear smart watch will also be implemented with mobile phones or tablets for Data Synchronization , including information synchronization, notification synchronization and even application synchronization, when you install an Android app on your phone, yo
If you want to install an app with Google map add-on the android real machine, you need Google map add-on to the real machine itself. How can we install an app with no built-in real machine?
Not all android real machines contain Google map add-on. To build
, two apikeys are generally required: Debug key and release key. The so-called debug key is used during program development. Because the android program requires a digital signature for use, it is too troublesome to run the program every time during development. Therefore, the system automatically uses debug during the development process. keystore signs the program, debug. keystrore is located in c: \ Documents and Settings \
To obtain the fingerpri
Google Android often comes with some Android applications. Currently, the most widely used Web browsers are: client programs for sending and receiving emails, text message sending and receiving programs, calendars, calendars, maps, contact books, and address books.
However, applications are not the focus of
used normally. If Google map add-on is not built on the target machine, the application can be installed successfully. However, developers need to determine whether Google map add-on is available in the code, for example:
Try {Class. forname ( "Com. Google. Android. Maps
Moconews published an article in March 25 saying that the reason why so many operators and mobile phone manufacturers are willing to launch Android devices is that Google will return part of the advertising revenue generated by these devices to operators and mobile phone manufacturers., as long as mobile phone manufacturers and operators are willing to build Google
; Android-> Build-> Default debug keystore, then run the command keytool-list-alias androiddebugkey-v-keystore "full path of your debug. keystore FILE "-storepass android-keypass android, where full path of your debug. keystore FILE, which must be replaced with the Debug Key Path. The result is as follows:
OAuth1 requires MD5. After oau22. use SHA1 instead. Here,
.
Dalvik
Another important part of Android is virtual machines and a set of important runtime environments. It is a very clever design and is a very good underlying application of a mobile phone terminal.
How to generate code?
The Dalvik Virtual Machine only executes. Dex executable files. After the Java program is compiled, it must be converted to the. Dex format by using the tools in the SDK before it can be executed on the virtual machine.
I ne
Not all Android real machines contain Google Map add-on. To build Google Map add-on, you need to discuss it with google.
However, if we develop an Android application that uses Google Map add-on (
There are two methods:
1) maintai
The Android program calls googlemap on the local machine, transmits the start and end positions, and generates a Roadmap
Copy codeThe Code is as follows: if (wodeweizhiPoint! = Null ){
If (wodeweizhiPoint. getLatitudeE6 ()! = 0 ){
Float chufajingdu = (float) (wodeweizhiPoint. getLongitudeE6 ()/1E6 );
Float chufaweidu = (float) (wodeweizhiPoint. getLatitudeE6 ()/1E6 );
Float daodajingdu = (float) (AppConstant. PointZuoBiao. liangxiangDaoHangPoint. getL
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