Android deep exploration and HAL-driven development (Volume 1)-Chapter 8: android-driven developmentBuzzer type and working principle
The buzzer also becomes PWM (Pulse Width Modulation). The basic principle is to control the opening and stopping of the buzzer through the pulse. It is a very effective technology that uses the digital output of a microcontroller
1. First, let's take a look at the effect comparison chart before and after the modification.
ModifyImage after
ConfirmRestart Interface
The specific modification content is described in the next article.
Android system transplantation and debugging -------> how to modify functions such as restart, flight mode, and mute mode for Android device
Preface
The android development language uses Java, so we need to install JDK (Java Development Kit) Java Development Kit. Android development uses JDK, therefore, we need to install JDK or a later version on our computer.
Install JDK
After JDK is installed, enter Java-version in DOS. It indicates that the installation is correct. You can see that JDK 1.7 is installed successfully, however, whether th
-pressing event to another AtyYou can see that we are successful and return to the original activity when the click returns.To start a page:startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.baidu.com")));Use this method to start a page (the default browser is called and automatically returns to the previous page when the page is closed):Here's a successful jump back.In the list of recent applications, we can see that we have called the default browser to implement this function.
Android Application development performance optimization 1: ViewStub
When developing our Android Application, you may need to dynamically display a View or Layout at runtime based on certain conditions. The most common method is to write all the views that may be used in the layout file. First, set the unwanted View. setVisibility () parameter to View.GONE (invis
has its strengths and weaknesses (see table 1 ). This document does not describe any of the four methods. There are only two ways to transplant OpenGL code from other platforms: the SDK package class for OpenGL ES and the NDK that can be used to develop OpenGL ES in C/C ++. For the other two methods, the SDK Canvas application programming interface (API) is a powerful 2D API that can be used in combination with OpenGL ES, but is limited to 2D and req
Unity3d SDK Android development (1)
Android project interaction and sdk addition Guide: (Full Version)
There are two solutions to connect u3d with android natvice:
. U3D project interaction solution:
A. using u3d with jni and using jar solution for direct processing, the principle is to directly package apk in u3d. In
Android Development Kit, you must first make an important decision-which integrated development environment should we use for short, IDE?1. Eclipse or Android Studio?
Not long ago, the golden combination of Eclipse and ADT (Android development tools) plug-ins was still a recommendation environment in the
. Sh~ /Donut $ make-J8~ /Donut $ emulator-skin wvga800
Check whether the status bar has changed?
2. Add a simulated button for the buttonModify frameworks \ base \ Services \ Java \ com \ Android \ Server \ status \ statusbarview. Java
1. Add a reference to each image button,Android. widget. linearlayout keyslayout;Android
Don't say anything, directly on the code. If you can not understand the following and I leave a message.
First look at the service side: the use of PHP language, deployed in the Sina SAE server (with the database)
Put all the PHP files in the same directory:
1.db.php encapsulated classes for connecting to a database
2.response.php used to encapsulate communication data (JSON or XML)
3.checklogin.php is provided to the client to allow t
Android has a built-in asynchronous class, which encapsulates asynchronous operation methods, mainly including three operation methods.
1. doinbackground this is a program running in the background, that is, a new thread is created to run content in the background, such as (obtaining images through the network)
2. onprogressupdate is an update on the front-end interface. To reflect background operations to
GitHub's popularity in China does not need to be repeated. More and more open-source projects are migrated to the GitHub platform. What's more, it is necessary to understand the popular open-source Android and iOS projects based on the principle of not repeating the wheel. Using these projects can sometimes help you get twice the result with half the effort. To this end, CSDN has compiled the most popular open-source
Android development optimization-UI optimization (1), androidui
During Android Application Development, the layout code of the control on the screen is usually separated from the logic code of the program. The layout code of the interface is stored in an independent xml file, which is organized in a tree and controls the layout of the page. Usually, many controls
This section describes how to use Google map on Android phones. We generally use Google map API + location API, that is, map API + status API, if we add some server and network knowledge, we can create very creative applications, and these are the popular lbs, the main technologies involved include map API + status API + javaee SERVER + mobile phone communication + XMPP protocol (mainly instant communication ). We can use our imagination to make a goo
Android basic notes (1)
1G-5G introduction to the Android operating system introduction to the Android version Android system architecture introduction to different ART-Mode Simulators of two virtual machines SDK directory Android
the available namespaces in mono for Android, and their functions are self-evident. These namespaces are specific to Android and the code they are written can only run on Android-based devices.
1.2 Mobile Development
When building an application, you must keep in mind the following points:
(1) The
1. How to run a single Android instance
We all know that the Android platform does not have a task manager, and the internal app maintainer has an activity history stack to display and destroy windows, startactivity may use the flag_activity_new_task flag to open a new window, for example, launcher. Therefore, it is easy to implement a single task, first, andro
This section describes how to build an android Development Environment Based on Android SDK (2.3) and eclipse (Helios) in windows and create the first application Hello Android world. The specific reference of the small blog: http://blog.sina.com.cn/deabowayOr http://blog.csdn.net/deaboway.
Now, we can use eclipse to create and develop
Thank you for your patience. This book is expected to be available in middle March. From today on, I will include some of the content of this book in my blog. Note that the original article is serialized without being edited by the publisher, so it may look a little non-professional.
[Key point: we recommend that you use source insight or eclipse to read the code from vim.
The skill required for Framework developers is to use Eclipse to debug the System_server code.
Finally, there is no code. Fo
Android-1-phone dial
Project package src -- java source code gen folder -- resource file, automatically generated after modification --- R. the drawable class in java corresponds to the drawable directory in the directory, layout corresponds to the layout directory, and String corresponds to the assets folder in the String directory to store large files, such as videos, audios, fonts, etc. (
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