android studio application development pdf

the development and present situation of 1.Android mobile phone platformAndroid founder Andy Rubin. 2008.9.22 first Android Phone: t-mobile G1 2010.1.7 Google's first co-branded mobile Nexus One (HTC G5)architecture and features of 2.Android mobile phone platformThe bottom layer is built on Linux and the

As any mobile platform continues to develop and its applications are constantly improved, quality becomes crucial if development is successful. Today, users require that they decide to install Android applications on their own devices to respond quickly and with reasonable performance. If those applications fail to provide exciting features and stable user experience, they will soon be uninstalled. This art

IntroductionPrevious Android Development tour: Application Basics and Components describes the basics of the application and the four components of Android, this article describes how to activate a group shutdown component. The topics in this article are as follows:

Androidmanifest.xml on Android development tour: The directory structure of the HelloWorld project 1.6, Androidmanifest.xml A brief introduction, you can refer to the next article will also introduce it.2.1. Activities (Activities)An activity represents a visual user interface that focuses on the events that a user is engaged in. For example, an activity might represent a list of menu items that a user can

the State management of long-time data (such as cursors. You cannot tolerate lag or pause when an operation is being processed by your application. If an operation is time-consuming and resource-consuming, You need to detach the operation and perform asynchronous processing on it, so that your application remains responsive and users can process their transactions. This principle applies to disk read/write

Many times, the use of touch screen fling, scroll, such as gesture (gesture) operation will make the user experience of the application greatly increased, such as using scroll gestures in the browser to roll the screen, with the Fling in the reader page and so on. In Android, gesture recognition is done through the Gesturedetector.ongesturelistener interface, but William Rummaged through the official

In Android apps, the most memory-intensive is the picture resource. And on Android, when reading bitmap bitmap, the stack size of the pictures in the virtual machine is only 8M, and if exceeded, a outofmemory exception occurs. Therefore, the memory optimization of the image is an important part of Android application

this operation, when any part of the application is requested, the system must be able to start the process of an application and instantiate the Java object of this part. Therefore, unlike most applications in other systems, Android applications do not have a single entry point (for example, there is no main () function ). On the contrary,Several necessary comp

In Android applications, image resources are the most memory-consuming resources. In addition, in the Android system, when reading bitmap, the size of the image stack assigned to the virtual machine is only 8 Mb. If the size exceeds the threshold, an outofmemory exception occurs. Therefore, image memory optimization is an important part in Android

add the following code to the AndroidManifest. xml file of your app: android:name="android.permission.READ_CALENDAR"> android:name="android.permission.WRITE_CALENDAR"> After registering these licenses, you can access your calendar data without any Google login issues. Because the calendar application is not installed in the Android simulator, all testing and

Introduction and basic usage of AsyncTaskFor details about the introduction and basic usage of AsyncTask, refer to the official document and Android Development Notes: multi-threaded AsyncTask. A problem caused by AsyncTaskLast week, I encountered an extremely strange problem. A small function downloads an image from the network and puts it in the ImageView. It is implemented using AsyncTask, and its logic

We've learned how to invoke an activity in a single application of our own. However, one of the more important developments in Android is the use of intent to invoke other application activity. In particular, your application can invoke many "built-in" applications in the system. The so-called "built-in"

. Widget add: Long Press Menu key, click Widgets option. Find the corresponding widget and drag it into the desktop. A slightly different version of the API is displayed for different versions. The typical Android Widget has three main components, a border, a frame and graphics controls, and other elements. When you create the Widget class in Android Studio,

Reprint Please specify source:http://blog.csdn.net/allen315410/article/details/42521251Monitoring and unloading scenarios and principle analysis 1, situational analysisIn the previous blog I wrote about the NDK development practice project, the use of open source Lame library transcoding MP3, as the previous basic blog for the deepening understanding of use, but such projects are not useful, in addition to practicing the NDK Foundation. This blog, I w

People who have worked on Android map application development know that the popular map frameworks are Google, Baidu, and AMAP. For map development on Google and Baidu, you must obtain an api key before being authorized to develop applications. AMAP does not need to be so troublesome. Therefore, this article uses AMAP

Although Android smartphones and tablets are faster than a day, developers must remember that their applications are still running in a resource-intensive environment, this environment relies primarily on batteries and processors that are unmatched by the latest desktop or laptop. Some of the methods described below can help your applications to "slim down" or "Ten Key Points for Android to improve

Introduction to the development history of 1.AndroidThe origins of 1.1Android: Android was a mobile operating system created by Andy Rubin and later acquired by Google.1.2Android platform Architecture and features: The bottom layer is built on the Linux system, which consists of the operating system, middleware, user interface and application software four layers

both IOS and Android are popular mobile operating systems, used by mobile terminals and smart devices, both of which are designed with advanced software technology, and use advanced design patterns to facilitate application development. What technologies are used in the design of the framework? What design patterns are used? What are the similarities and differen

. This document focuses on common APIs and development technologies to provide the best practices for your applications and users' security risks. The best practices are constantly evolving, we recommend that you check the application development process at any time. This article includes: Ø use virtual machine code Use local code Ø Data Storage Use IPC Use Permi