Android practice simple tutorial-48th gun (App guide page effect implementation), androidapp
Kids shoes that often use apps will find that the first time they enter the APP, there will be a boot page, which can include some APP usage introductions or other information. Next we will study how to implement this function,
signature information to verify the integrity of the APK file.
Androidmanifest.xml. This file is used to describe the configuration information of the Android app, the registration information of some components, the permissions to use, and so on.
Classes.dex. Dalvik bytecode program, let Dalvik virtual machine executable, in general, Android application
system, it does not affect the normal functionality of the program, even if the certificate expires.
Android uses standard java tools Keytool and Jarsigner to generate digital certificates and to sign application packages.
6.Publish the ApplicationThe process of publishing apps on Google Play is available on the Web , and I'll just briefly describe how the application is published in the domestic app
Zealz GK802 used the black matte plastic and metal body, the texture is good, perhaps the most sophisticated Android mini computer. Its weight is only 51 grams, the fuselage size is not more than the common U disk most of the whole is still very lightweight and portable, the fuselage at the bottom of the design of a number of heat-filled holes with modern sense.
Front of the fuselage, you can see a
packaging default file name or directory structure, etc.), you can look at the Android/app/build.gradle file.
The generated APK file is located in android/app/build/outputs/apk/app-release.apk, which is already available for publishing.
5-: Test the release version of t
Using Kotlin to develop Android app first experienceLast night, the latest Google IO conference formally Kotlin determined for the official development of language, as an Android development bird, how can not taste fresh in time?A brief introduction to KotlinBefore development, many students must have a lot of questions, Kotlin in the end there is what good, how
The screen size of Android mobile phones has always been a headache for developers. Because the screen sizes used by mobile phone manufacturers are different, the presentation and layout of user UI interfaces are naturally different. Therefore, when developing Android mobile appsProgramIn addition to understanding the underlying API, the most important thing is t
0.66666,ldpi, which gives a non-shaping pixel count.QVGA, the screen density of WQVGA is: 120The screen density of the HVGA is: 160The screen density of the WVGA is: 240Where ldpi resources are not required, when providing hdpi resources, the system automatically shrinks the HDPI resources by half to fit the ldpi screenNote: Screen density and screen resolution are different concepts, with screen resolution and size, you can calculate the screen dens
Original: Android Project Combat (V): TextView Adaptive sizeThe default size of the font set for the TextView is important for the UI interface to look good, the small screen setting of the text is too large or large screen settings of the text too small to cause the UI is not beautifulNow let's learn the adaptive size
Dip:device independent pixels (device independent pixels). Different devices have different display effects, this is related to the device hardware, generally we support WVGA, HVGA and QVGA recommend this, do not rely on pixels.DP: Same as dip.Px:pixels (pixels), a pixel is usually considered as the smallest full sample of the image, different devices display the same effect, generally we hvga represent 320x480 pixels, this use more.Pt:point, is a standard length unit, 1pt=1/72 inches, for the p
detail, see" Span style= "FONT-SIZE:10.5PT; Color:rgb (0, 0, 255); Font-family: Song body; Text-decoration:underline; " >java Learning of the reflection mechanism ". Using the reflection mechanism to hide api has the advantage of being flexible and able to catch exceptions in incompatible systems without crashing the program , the disadvantage is that the
pixels.QVGA, the screen density of WQVGA is: 120The screen density of the HVGA is: 160The screen density of the WVGA is: 240Of LDPI resources are not required when hdpi resources are provided. The system will voluntarily reduce hdpi resources by half to fit the ldpi screenNote: Screen density and screen resolution are different concepts, with screen resolution and size, can calculate the screen density , such as the resolution of 320*480, screen
There are often many errors when importing an Android app project. Taking the built-in alarmclock as an example, many errors often occur after eclipse is imported, as shown in:
For example, intent. action_alarm_changed in cannot be accessed.Source codeSee why?
According to Java programming specifications, we know that this API (static variable) is hidden, so it cannot be used in the SDK. After kn
PPI: pixel density, pixels per inch (1inch=2.54cm), which is the number of pixels per screen. Pixel density =√{(length pixels ^2+ width pixels ^2)}/screen size.Dpi:dots per inch, point in dots, refers to the printing accuracy in the printing industry. In the official Android development Guide, the meaning of the PPI is the same as that of pixels per inch.Resolution: Refers to the number of pixels in the horizontal and vertical direction of the phone s
Explanation of dpi/screen-size on androidAndroid defines four screen-size: small normal large xlarge and six dpi levels: ldpi (low )~ 120 dpimdpi (medium )~ 160 dpihdpi (high )~ 240 dpixhdpi (extra-high )~ 320 dpixxhdpi (extra-high )~ 480 dpixxxhdpi (extra-high )~ 640 dpi defines these levels to better organize resources to adapt to different devices. See: The http://developer.android.com/guide/practices/sc
Android special effect album (8)-implement the special effects of heart bubbles and dancing, so that your APP can be instantly refreshedAndroid special effect album (8)-implement the special effects of heart bubbles and dancing, so that your APP can be instantly refreshed
The Annual leave will also be put soon. It is estimated that there will be no Internet ac
Android app architecture design 01, androidapp1: This article has been excerpted,
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-Consistency of requirements, designs, and codes during development-the entire program has a uniform style, such as a dialog box style, button style, tone, and other UI elements-the specific and unified structure of the entire program, for example, when different modules access the network, their calling met
Learning notes: App transduction-Details Android and iOS platformsReprinted from: http://www.woofeng.cn/articles/168.html Copyright belongs to the original author allYa Ru has leeOriginal address: http://blog.boocss.com/app-android-ios/One. Android versionIn the
space, which can cause oom error. In our Android platform, most of the situation is in the picture when the improper processing load.The way of memory management is to understand and find out the causes of memory leaks, and then based on these anti-rational coding, to prevent and then avoid excessive memory overhead situation. To learn how to manage memory reasonably, it is best to first understand the mechanism and principle of memory allocation. On
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