android interview preparation

Android interview is required to ask about event distribution of a View, and Android view event Distribution I really want to prepare many things for the interview. In fact, I think it is difficult for a programmer to become a programmer. It is possible to have an interviewer, I don't even know .................. howev

This article specializes in the study of Android interview questions, content will continue to increase with the study, if the answer is wrong, I hope you can correct me1. Brief description of activity life cycle when activity starts, first call OnCreate (), OnStart (), Onresume () method, at which time the activity is visible to the user.When activity changes from visible to dialog occlusion, the OnPause (

Question:Please briefly describe how you optimize the memory during Android development. Analysis:As we all know, Android applications run in Java virtual machines, and garbage collection uses the GC mechanism in Java. The system schedules the whole process and developers cannot directly intervene, therefore, it is particularly important to properly use the memory during development. 1. Bitmap optimization:

still visible, although it is not the foreground activity. The service to which activity is bound is visible. (Service bound by activity in case of appeal) The visual process is generally not killed by the system unless it is necessary to ensure that the foreground process is running.Service process Service that has been started Background process Invisible activity (activity after calling OnStop ()) The background process does not affect the user's experien

Android interview questions -- Activity, android -- activity 1,What is Activity?Activity is one of the four most basic and common components in Android (Activity, Service, Content Provider, BroadcastReceiver broadcast receiver.Activity is an application component that provides a screen for users to interact with each o

Android interview questions -- Service, android -- service 1. Is the Service executed in main thread and time-consuming operations performed in the service?By default, if no process is displayed, the Service and activity are running in the main thread (main UI thread) of the process where the current app is located.The service cannot perform time-consuming operat

My android interview path (5: Do you have any questions ?), Android pathWhat else do you want to ask? Okay, the typographical problem is that I do not like to use punctuation marks (,.) I like it. I see a funny question, but almost every interviewer has met and knows what it means. Under normal circumstances, if the technical side encounters this sentence, it sho

Android development environment. It has several modules, such as File Explorer, Logcat, emulator control, and so on.The difference and connection between the JDK and the JRE and the JVM:Jdk:java Development ToolKit (JavaDevelopment Kit). JDKis the entireJAVAthe core, including theJavaOperating Environment (Java Runtime envirnment), a bunch ofJavaTools (Javac/java/jdb, etc.) andJavathe underlying class library (that is,Java APIincludeRt.jar). jre:ja

Android interview questions 1. Whether the process of android dvm is the same concept as that of Linux: A: dvm is a dalivk virtual machine. Every android application runs in its own process and has a dalivk Virtual Machine instance. Every dvm is a process in linux. Therefore, it can be considered the same concept. 2. W

When reviewing the Android basics tonight, I found some valuable basic knowledge and shared it with some Android Developers. These are basic knowledge and can be used as interview preparation. The interview questions are actually a good basic knowledge to learn. If you have

opened, and the newly opened thread is not a good way to access the View object. A forced interview will be reported: Android.view.viewroot$calledfromwrongthreadexception:only the originalthread that created a view hierarchy can touch its views.At this point you need to create a subclass that inherits the Android.os.Handler. and override the Handlemessage (messagemsg) method. Android.os.Handler is capable of sending and processing messages, you need

requires a new thread to be opened, and the newly opened thread is not a good way to access the View object. A forced interview will be reported: Android.view.viewroot$calledfromwrongthreadexception:only the originalthread that created a view hierarchy can touch its views.At this point you need to create a subclass that inherits the Android.os.Handler. and override the Handlemessage (messagemsg) method. Android.os.Handler is capable of sending and pr

This article specializes in the study of Android interview questions, content will continue to increase with the study, if the answer is wrong, I hope you can correct me1. Brief description of activity life cyclewhen activity starts, first call OnCreate (), OnStart (), Onresume () method, at which time the activity is visible to the user. when activity changes from visible to dialog occlusion, the OnPause

This article specializes in the study of Android interview questions, content will continue to increase with the study, if the answer is wrong, I hope you can correct me1. Brief description of activity life cyclewhen activity starts, first call OnCreate (), OnStart (), Onresume () method, at which time the activity is visible to the user. when activity changes from visible to dialog occlusion, the OnPause

work experience. Second page of project experience. Finally, I will write down my personal skills. One and a half years of work experience is at least two years of experience for the best project. At least one or two real projects are required. I wrote two small projects I made on the dark horse. (Never write what the teacher taught in class) 2. advertising tactics:Where should I submit my resume? Haitou, I just selected a few. After two days of failure, select all yes! Select all, yes! . One d

Today is today 10 o'clock in the morning, I received a telephone interview Baidu, of course, and I said in advance, my procrastination is how strong, so I did not prepare, of course, I also want to look at their true level, in this review!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ！！！！！！！！！！！！！！！！！！No more nonsense.To come up is a technical staff of Baidu called, simple confirmation of my information, began to ask questions, at the moment my heart h

to store recently used objects in linkedhashmap with strong references, and to remove the least recently used objects from memory before the cache value reaches a predetermined value. In the past, we often used an implementation of a very popular memory caching technique, either soft or weak (SoftReference or weakreference). However, this is no longer recommended because, starting with Android 2.3 (API Level 9), the garbage collector is more inclined

For Android interview in some of the common knowledge points, Max is just a porter, thank you for quoting the article in this article of the authors, to share so many excellent articles, for which the analysis is the original author's personal opinion, there are errors and inaccurate places, also please everyone actively correct.This article will continue to be updated, and I'll put it on GitHub as well: po

developers are primarily using this layer of packaged APIs for high-speed development.applications: This layer is the Java application layer, the Android built-in GoogleMaps, e-mail, instant messaging tools, browsers, MP3 players, etc. in this layer. Programs developed by Java Developers are also at this level. And the built-in application has an equal position, can call the built-in application, can also replace the built-in application. talk about

This article is reproduced. I hope my friend has a good interview question to study ......1. Check whether the process of Android dvm is the same concept as that of Linux.DVM refers to the Virtual Machine of dalivk. Every Android application runs in its own process and has an independent Dalvik Virtual Machine instance. Every DVM is a process in Linux, so it can