Android APP performance analysis methods and tools, androidapp
I recently read Speed up your app. This is an article about Performance Analysis and Optimization of Android apps. In this article, the author introduces the APP analysis and optimization rules, and the tools and
Next, let's take an example of the rollback Stack:
The android browser app declares that the Webpage Browsing activity must be opened in its own task-by specifying the singletask Startup Mode in the
Whether an activity is started from a new task or in a task that already e
When using SVN to update the code in the Windows environment, there will always be a heap of garbled characters in the source file, especially the garbled characters in the XML file, which is not only hard to find, but also more laborious to Androidstudio.After the recent update of the code from SVN, the following prompt appears at compile time, and there is no error in the AS, which is a real catch.DataBinding error:execution failed for task ': App:d
Application will be completely removed, on the contrary, no operation is performed.
As we already know, the Application is basically composed of four modules: Activity, Service, Content Provider, and Broadcast explorer. Activity is the main body of the Application.
What is Activity Stack?
When operating applications, you sometimes need to call multiple Activities to fulfill the requirements. For example, to send an email program, first enter the main interface of the email, and then start a n
data to the UI. Because the Worker Thread cannot directly access the members in the UI Thread, that is to say, there is no way to operate the content on the UI interface. If the operation is performed, an exception is thrown: CalledFromWrongThreadException.
In fact, android provides several methods to access the UI thread in other threads:
Activity. runOnUiThread (Runnable)
View. post (Runnable)
View. postDelayed (Runnable, long)
Handler message
news and links. But 173 of the hands do not have a good effect on the station. Because the hand tour does not pay much attention to the Guild, so the zone does not work, or news and links useful. Domestic has more than 20 hand travel network media, must send news guarantee exposure. But because there is not a single big, so the energy can be scattered, the pursuit of more than the volume. This is mainly a brush face. Daily media relations and business cooperation are essential. Some nodes, the
the stack. If the interface component is called again, the interface component is emptied and reused again.SingleInstance is a little different, that is, there is only one interface component in the new task, and Singletask is a number of other interface components in the new task.Use Singletask also note: If the interface component set the task Viscosity property, Android:taskaffinity property, then the i
Supports thawing and freezing apps
Support to hide specified app in the app list
Support detection system core app to prevent delayed freezing causing cell phone to become brick
Support Cleanup App Cache
Support Force Stop Ap
in the values/directory describe multiple resources. For a file in this directory, each child of the element defines a single resource. For example, the A element creates an R.string resource and a element creates an R.color resource.Because each resource are defined with their own XML element, you can name the file whatever you want and place different res Ource types in one file. However, for clarity, your might want to place unique resource types in different files. For example, here is s
Delay in running a task in Android
Android app development requires a latency function in some situations. For example, if the app homepage is displayed for 3 seconds and then automatically jumps to the logon page, this is like a pre-load, however, the pre-loading may be co
Android App development in some cases need to have a delay function, such as the app home display 3 seconds, and then automatically jump to the login page situation, which is like a preload, but this preload may be completed in an instant, support less than 3 seconds, which is required to do time-delay processing.Here are three ways to do this:One, thread 1. Ne
environment variable pathThen cmd to the tools directory of the Android SDK, use the Andrlid List command, and remember what you're going to run in the simulator (and the platforms you just imported Android.jar and Uiautomator.jar packages)Use under CMD
Android Create Uitest-project-n
-N for the generated jar package name, as defined by itself,-T f
Description of the error
Today, I added the Jackson development package to the Android Studio project, which was compiled at the time of execution. An error such as the following is raised:
Error:Execution failed for task ‘:app:transformResourcesWithMergeJavaResForDebug‘.> com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate files
Delayed execution of a task in AndroidAndroid app Development in some cases need to have a delay function, such as the app home page display 3 seconds, and then automatically jump to the login page situation, which is like a preload, but this preload may be completed in an instant, support less than 3 seconds, which is required to do time-delay processing. Here a
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True machine record, a bit drop frame, pay attention to the effect chart, the middle of my crazy drag scroll bar, but the picture is basically still instantaneous display.Say, FIFO if set to this mode, in the control does not do, the user pull slower effect is good, but the user mobile phone if there is a thousands of, instantaneous pull to the end, the last screen picture may need to drink a cup of tea ~ Of course, you can do in the control, or, Drag when not to load the picture, stop to l
of the package name that is a category Category_launcherIntent resolveintent = new Intent (intent.action_main, NULL);Resolveintent.addcategory (Intent.category_launcher);Resolveintent.setpackage (Packageinfo.packagename);Traverse through the Queryintentactivities method of the Getpackagemanager ()list. Queryintentactivities (resolveintent, 0);ResolveInfo ResolveInfo = Resolveinfolist.iterator (). Next ();if (resolveinfo! = null) {PackageName = parame
) {The last app in the list is the foreground app.Adj = Foreground_app_adj;App.adjtype = "Top-activity";}Low memory killer in Android kernelAndroid's low memory killer kills processes as needed (when the system is in short supply) to free its ram, and the source code is in KERNEL/DRIVERS/MISC/LOWMEMORYKILLER.C. Simply put, it is looking for the most appropriate p
Go to the hardware store to buy a drill, not because we need to drill, we just need to hole, since the hardware store can not buy holes, back and second, buy punch tools. The same for background threads, what we really need is the ability to process outside of the UI main thread, and Android provides an easier and more transparent asynctask for programmers to write background operations.With Asynctask, you need to create asynctask data, implement the
Recent company projects add something, the caller is "mobile banking", the callee is "Bankeys", take a time to record, in fact, very simple1. Caller:This we can use the normal activity of the startup mode, the code is as follows:New Intent (); Intent.setaction ("com.bankeys.mobile_sign"); Intent.putextra ("Data" ) 1);2. Callee:Add the following code to the manifest file of the activity that needs to be called by the caller app:activity android:name= "Com.bankeys.shield.activity.BankBi
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