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on a 4-byte boundary (4 bytes is a good value) so that the Android system can use the mmap () (Please check the purpose of this function yourself) The function reads the file and can get high performance on the read resource, Ps:1. Alignment on a 4-byte boundary means that, in general, the compiler bar 4 bytes as a unit for reading results, so that the CPU can be efficient and fast access to variables (compared to the previous misaligned). 2. T
About the Android architecture, because of the limitations of the mobile phone, I do not think there is really much to talk about, but from the perspective of development, see neat code, graceful layering is always a comfortable enjoyment.From the artistic point of view, we are actually pursuing a kind of beauty.This article analyzes several of today's more popular Android software packages , and finally we
;import Android.content.context;import Android.os.environment;public class Mydatacleanmanager {public static String Gettotalcachesize (context context) throws Exception {//context.getexternalcachedir ()--sdcard/android/data/ Your app package name/cache/directory, typically storing temporary cache data Long cacheSize = Getfoldersize (Context.getcachedir ());//context.getexternalfilesdir ()-- > sdcard/
the APK file on the 4-byte boundary (4 bytes are a good value), so that the Android system can use MMAP () (please check the purpose of this function) function reading files can achieve high performance in reading resources,PS: 1. alignment on the boundary of four bytes means that, in general, it refers to the result that the compiler reads four bytes as a unit. In this case, the CPU can perform efficient and fast access to variables (not aligned bef
In Android, ListView achieves parallel image and text and custom split lines (improved imitation APP), androidlistview In the blog post Fragment and ViewPager in Android yesterday (early this morning), we used Fragment and ViewPager to simulate the layout framework. Today, we will use ListView to implement the basic view of the contact column. The effect is as fo
Android Compression Toolset Description documentI. Introduction to the Toolset (Project address: https://github.com/liyuming1978/NativeLibCompression)The Android Compression toolset provides an extremely concise way to provide a much higher compression ratio of so files in a storage application than Android's original zip (later versions can also support compressing dynamically loaded jar packages, as well
' spreloadeddrawables cache, intercepting all requests for the shape.Iv. How to access svg-android1. svg image converted to vector fileSince Android only supports some of the canonical SVG files, so we still follow the official idea, Sir into a legitimate vector file, so there is also a good thing is to refer to dimen and color, aspects of the uniform modification of size and color.There are many ways to c
I don't think there is much talk about the Android architecture because of mobile phone restrictions. But from the perspective of development, we can see neat code, beautiful layering is always a kind of comfortable enjoyment. From the perspective of art, we are pursuing a kind of beauty. This article first analyzes several popular android software packages, and finally builds our own general
below:staticfinalint1;privatevoiddispatchTakePictureIntent(){ new Intent(MediaStore.ACTION_IMAGE_CAPTURE);//在调用startActivityForResult()方法之前，先调用resolveActivity()，这个方法会返回能处理该Intent的第一个Activity，即检查有没有能处理这个Intent的Activity。执行这个检查非常重要，因为如果调用startActivityForResult()时，没有应用能处理Intent，那么应用将会崩溃。所以只要返回结果不为null，使用该Intent就是安全的。 ifnull) { startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE); }}Two saved photos 2.1 get thumbnail imageThe Andro
Because the H5 page in the mobile side of the compatibility and extensibility of the advantages, but also for the application of the H5 page embedded in the app's flexibility has greatly improved (such as activities, game updates, etc.), app development inevitably need to load some H5 page, but the Android client page content of the typesetting, collation, Interactions, and so on, may cause unexpected probl
a low-memory phase, and your process will be one of the first processes to be killed by the system, and you should release all resources unrelated to your app's state.Although the Ontrimmemory () interface is not joined until API14, you can still use the Onlowmemory interface as the old version of the callback, which can be the same as the trim_memory_complete level in Ontrimmemory ().Note: When the system starts to kill the process in the LRU cache, although he starts from the bottom up, he wi
this article by Purplesword (jzj1993) original, reprint please specifyOriginal URL http://blog.csdn.net/jzj19931.px = Pixels, pixel value2.DP = Dip = device independent pixel, unit independent pixel (Android dedicated virtual pixel unit)3.density, screen density (1) approximate conversion relationship px = dip*density, dip = px/density (2) the same pixel value (px) of the control, on different density screen, the display effect is la
This article is a casual talk about how we can build a good architecture during the initial stage of project initialization in Android development.I don't think there is much talk about the android architecture because of mobile phone restrictions. But from the perspective of development, we can see that it is neat.Code, Beautiful layering is always a kind of comfortable to enjoy.From the perspective of art
. and including the user's personal information, SMS and so on privacy, in silent has become the criminals used to exchange money chips. So, how to prevent this phenomenon frequency? Up to 2014 year 1 month, the number of malicious Android apps worldwide has broken through 1000 million mark. The number of mobile malware is exploding: almost all aimed at android Span style= "
the edge of the screen and should not be visually aligned with other widgets. Therefore, you should add margins around all the borders of your widgets. From android4.0, app widgets automatically add margins between the widget's border and border to better align with other widgets and icons on the home screen. To obtain this benefit, we strongly recommend that you use more than 14 SDK versions for your applications. Write a single layout that can adap
Use of iconsIcons can give the most intuitive impression, sometimes a lot of explanations can not be an icon.The Android app's icons are divided into two categories, App icon: The start icon that represents the entire app on the main screen, is the icon that gives the user the first impression. A successful application development will not be downloaded
, select the installation location of the Android NDK at the right NDK locations, such as D:\ Android-ndk-r8.Sixth step: Create AVD ( Android Virtual Device )Android SDK provides Android Virtual Device Manager tool for easy access without real AndroidIn case of device Enviro
Android 5.0, Code Lollipop, the source finally released on December 3, 2014, a large number of domestic manufacturers follow-up. The biggest change is the default use of ART (Android Runtime), replacing the previous Dalvik virtual machine, presenting the Material Design interface style. Previously released app may need to make some changes, temporarily collected
Android App Digital Lock Recently took time to do the following digital unlock function, the phone has digital unlock, app can also do, to avoid some of the application of privacy leakage, is to achieve the effect of the map: Preface: These two days the boss gave a task, said is to do a copy of iOS Digital lock screen interface, thought that this thing onli
The project encountered a function of calculating the cache size and emptying the cache, a very common feature that almost every APP has, thought the implementation is very simple, search a large number of online, found are not in line with my needs, and often deleted no effect, so another to find some information, tossing a pretty long, and finally finished. The following features of this class are simple
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