Original: Android Camera2 photo (iii)--toggle camera, time lapse and flash mode
First, switch the cameraTo switch between the front and rear cameras, you first need to close the previously opened camera, turn off preview, then reopen the new camera and reopen preview.public void Switchcamera () { if (mcameraid.equals (Camera_front)) { mcamer
In Android development, we often encounter situations that control the display/concealment of a control based on a certain condition. Although setvisibility (int visibility) can do this, the hidden layout also executes the inflate () method when rendering, resulting in additional resource expenditure (memory), A better way to do this is to use the Viewstub object.According to the official website, Viewstub is an invisible (invisible) View object that
In project development, it is often necessary to fulfill our project requirements through time-lapse loading. So how to implement the delay, the following combination of Java and Android-related methods to implement the delay problem.I. using the thread's Sleep methodTwo. using timer and timertask delay timer3. using the handler message processing from Android
Direct reprint too Occupy place, simply find a place to put the address to collect, also share with you, do a good knowledge porter.Pwntools's documentation, intended to be available for translation. https://docs.pwntools.com/en/stable/PWN good place to practice https://exploit-exercises.com/About Linux rootkit authoring http://turbochaos.blogspot.jp/2013/10/writing-linux-rootkits-201-23.htmlhttps://www.sans.org/reading-room/whitepapers/linux/linux-rootkits-beginners-prevention-removal-901Http:/
, enter the time to judge whether there is no value, if no value is the first time to enter, then jump into the Application Guide page, otherwise, jump into the main page.2.ViewPager to achieve page turn effect:Package Com.yayun.guide;import Java.util.arraylist;import Java.util.list;import android.app.activity;import Android.content.intent;import Android.os.bundle;import Android.support.v4.view.pageradapter
Description: Only basic test logic is described here
Sort out a list of top-level pages that the app needs to focus on
Basic tools: UT (internal tools, inconvenient to reveal details)
Introduce the Timeprofile class in the development code: This class is the top of the UT, exposing some simple time-of-day methods, start (), End (), and so on;
In the corresponding code of the first level page,
Objective
As Android developers, presumably more or less to touch the start speed optimization related things, when the user more and more, the product function with more and more iterations, the App gradually become bloated is a very common phenomenon, even can be said to be unavoidable phenomenon, followed by the work is to optimize the performance of the app,
ReproducedTwo known methods seem to be available, but the feeling results are inaccurate: one is, adb shell am start-w packagename/activity, this can get two values, Thistime and totaltime, do not know what the difference between the two, And it does not match the actual boot time, both of which may be smaller than the actual startup time (the difference is greater when testing the game), and the other is t
different positioning for the application, so the application launch requirements are not the same. For example, some do ROM company, its built-in application start time must be very fast, so that the user's first feeling is fast, smooth; The internet company app is not very concerned about the startup speed, most of the Internet company's applications have a launch page, used to display ads or feature int
Recently Learning Android application development, do not know what to write a program to practice practicing, just recently the stock is very hot, on an app to get stock data real-time, named Mystock. Using the development tools Android Studio, you need to download from the Androi
Android through the app to set the system's date and time in theAndroid 2.3Android 4.0Test is possible, just need root permission.Import Java.io.dataoutputstream;import java.io.file;import Java.io.ioexception;import Java.util.Calendar;import Android.os.systemclock;public class Systemdatetime {static final String TAG = "systemdatetime"; public static void SetDate
The first time Android APP opens the boot interface, this demand is very much. When writing a new project, just want to use, on the Internet to find a demo, did not find the non-satisfactory. So I had to write one by myself, to share, to avoid repeating the wheel after all. Below (though a little ugly)This is the interface to guide the interface guideactivity, th
. (rounded).OK, the design of the database is this way, to finish this feeling in fact the design of the database is not difficult, as long as they can analyze the focus of what is done in the good.The app's core data is actually a record, which includes category, time, time, and so on field values.However, it is not possible to design only one table, because designing a table is not conducive to querying a
From: http://www.techolics.com/android/software/20121204_322.html
I recently learned how to develop the Android mobile phone system, so I want to find some practical examples to learn and practice. I just found that there was an app on the iPhone that could query paper gold and silver prices in real time. It should be
appinfo = am.getRunningAppProcesses();for (RunningAppProcessInfo runningAppProcessInfo : appinfo) {if (runningAppProcessInfo.processName.equals("yourpakagename")) {Log.e("TAG", System.currentTimeMillis() + "");}}}
This method is more accurate than the first method without the source code.
Method 3: Call the application (shell am) to obtain the startup time.
Idea: Call the Android shell command to
Although Google provides the firstinstalltime interface (actually a public field) in packageinfo, it seems useless and the return value is zero. Google can actually get the installation time.
Packagemanager PM = context. getpackagemanager (); applicationinfo appinfo = PM. getapplicationinfo ("app. package. name ", 0); string appfile = appinfo. sourcedir; long installed = new file (appfile ). lastmodifi
items. Click "Preview"
Note: It is best not to place your project in the Chinese path. Otherwise, an error will occur during rename. I started to put the error in the Chinese path for a long time before I found the error!
4. Delete this sentence in the AndroidManifest. xml file. (Android: sharedUserId = "android. uid. shared ")
In this case, I used launcher 2.
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