The generated Android application APK file is best optimized because the essence of the APK package is a zip-compressed document that optimizes the orderly arrangement of uncompressed data in the package, reducing the memory consumption at the time the application runs. We can use the Zipalign tool for APK optimization.
Zipalign is an important tool for optimizing APK applications, according to the Android
following code:-keep class Package name. * * {*;}5.complie obfuscation of third-party jar packagesComplie's third-party jar packages are confused in the same way as Libs, just open:Open the corresponding reference jar file and use the same-keep class Package name. * * {*;}6. How code comments are confusedWe have definitely used annotated code in the project, such as a knife (butterknife). You need to use @bind to modify the variables. The following code is required to keep this comment:class bu
[Qt for Android] The first android program, Android android1)First, you need to download the Qt SDK for Qt for android from the official website.2)Download android-related sdks. You do not need to find them. The corresponding download link is available in the
The previous article describes the communication between the Android phone and the BLE terminal, while the most common ble terminal should be the ibeacon base station advocated by Apple. Ibeacon technology based on BLE, it is characterized by the broadcast of external messages, mobile phones do not need to connect to the Ibeacon base station can also obtain its information, is mainly used to do indoor positioning and marketing information push, in the
Android Push principle
Since the recent project involved Android push, I saw something about Android push, and we know that the Android push can come down to 3 kinds of implementations:
1, POLL, pull. The general idea is to send the request to the server regularly, and then let the server return the information itsel
RAR for Android is an old WinRAR free Android tool that allows you to compress and decompress files on Android devices.
Via @Xang Azu
WinRAR, who ranks ahead of the piracy rate in China, has released a free decompression tool to support RAR, ZIP, TAR, GZ, BZ2, XZ, 7z, ISO, ARJ formats.
RAR for Android also support
My Android notes-my knowledge about android and my Android notes-androidAfter coding for such a long time, I recorded some of my concepts about Android. Most of the content below is sourced from network information and official documents. 1. The core of the Android operating
)
2
Onmeasure
Measure the size of the view (don't care for the moment)
3
Onsizechanged
Determine the view size (record the width of the current view)
4
Nlayout
Determine the child view layout (No child view, no care)
5
OnDraw
Actually draw the content (draw a pie chart)
6
Provide interface
Provides an interface (provides an interface for setting data)
The code is as follows:
public
A related download
(1) Java JDK Download:
Enter the page: http://java.sun.com/javase/downloads/index.jsp (or click to download directly) as follows:
Select the Download jdk to download only the JDK, without downloading the JRE.
(2) Eclipse download
Enter the page: http://www.eclipse.org/downloads/(or click Download: bt download http download) as shown below:
We chose the first (that is, the Eclipse IDE for Java EE developers)
(3) Download the Andr
Android Studio tutorial-Android Studio 2.1 installation and configuration, android-android1. Download Android Studio
Go to the official website https://developer.android.com/studio/index.html to download the latest version of Android Studio2.1 (bring your own ladder)
Or copy
Android development, permission acquisition, and android Development Permission
Turn: http://blog.csdn.net/yawinstake/article/details/6748897
Access registration attributes
Android. permission. ACCESS_CHECKIN_PROPERTIES, read or write the permission to register the check-in database Attribute Table
Get error location
Access registration attributes
Android. Permission. access_checkin_properties, read or write the permission to register the check-in database Attribute Table
Get error location
Android. Permission. access_coarse_location, which uses WIFI or mobile base stations to obtain the user's incorrect latitude and longitude information. The positioning accuracy is roughly 30 ~ 1500 meters
Get
Today, I saw an iOS written by the Turing machine people, directly to the official website (http://www.tuling123.com/openapi/) looked at the API access, too simple, just a GET request ~ So, wrote an android version of the robot, no technical content, But it is very fun ~ just last night to see their favorite Qin when the moon, hey, little Pixiu, is my robot pet! ~
This is an Android intelligent chat robot
Tags: github tle window remove line MoS CEP Pass source
3.1 Android Control architecture
Measurement of 3.2 view
Drawing of 3.3 view
Measurement of 3.4 ViewGroup
Drawing of 3.5 ViewGroup
3.6 Customizing View
3.6.1 to expand the existing space
3.6.2 Creating a composite control
3.6.3 rewrite view to achieve new space
3.7 Custom ViewGroup
3.8 event interception mechanis
[Android performance optimization series] memory basics-how to manage memory for Android, android-android
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The number of rows of tablelayout is directly specified by the developer, that is, the number of tablerow objects (or view controls.
The number of columns in tablelayout is equal to the number of columns in tablerow with the maximum number of child controls. For example, if the first tablerow contains two sub-controls, the second tablerow contains three, and the third tablerow contains four, the number of columns of the tablelayout is 4.
Attributes that can be set for tablelayout include gl
Android: Gravity/Android: layout_gravityDifferences: Android: gravity is used to set the position of the content in the view relative to the view. For example, set the text in the button to the left and center of the view. Android: layout_gravity is used to set the relative position of the view and its parent view. For
Author: Zambia chicks
Since its launch, Android has been favored and sought after by developers as an open source. Developers of most Android applications will refer to Dev guide. If you want to gain an in-depth understanding of Android, you must refer to the underlying source code to make it more straightforward.The Androi
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