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1, Introduce As a large memory consumer, pictures have always been the key object that developers try to optimize. Bitmap's memory is located in native before 3.0, then changed to jvm, and then changed back to native after 8.0. Each jvm process has a memory limit, while native has no limit (not without impact, at least not oom). Therefore, mov ...

When developing an application, the basic functions are the same. When packaging, distinguish channels, configure different package names and signatures. 1. Create a new project Simply create a default Hello World project. 2. Create a new folder for the corresponding channel Create a new folder qudao1 in the src directory, and then generate ...

1. Introduction to unidbg unidbg is a reverse tool based on unicorn to simulate the execution of binary programs. It allows security researchers to run android or ios dynamic library files directly on PC and call their methods to see the functions supported by the tool. The supported functions are as follows: Supports simulated execution ...

1. Foreword Students often ask: how to upload files at breakpoints? Breakpoint upload / download is a common scenario on the client. When we need to upload or download a large file, we will consider using breakpoint continuation. The biggest difference between breakpoint upload and breakpoint download lies in the record of breakpoint locatio ...

Personal notes sorting Activity activity Activity basic usage Registration activities Need to be in androidmanifest Register the activity in the application node in XML <activity android:name=".FirstActivity"/> If primary Activity <activity android:name=".FirstActivity" android:label="This is FirstActivity"> <int ...

Let's start with the code. You can ignore the creation of sets and fragment s in the adapter style we often write. public class VP2TaskPagerAdapter extends FragmentStateAdapter { private List<TaskTableBean> taskTableBeans; public VP2TaskPagerAdapter(FragmentManager fragmentManager, Lifecycle lifecycle,List<TaskTableBean> ta ...

Today, I share a previously implemented address book letter navigation control. Next, customize an address book like letter Navigation View. You can know several elements that need to be customized, such as drawing letter indicator, drawing text, touch monitoring, coordinate calculation, etc. the functions that can be achieved after customizati ...

What is TextView Displays text to users and optionally allows them to edit the text. TextView is a complete text editor, but the base class is, and editing is not allowed; Its subclass EditText allows text editing. Let's first look at the inheritance relationship of TextView in the previous figure: As can be seen from the above figure, TxtV ...

Android network framework -- OkHttp source code analysis This article is based on Kotlin language Previous article: Analysis of OkHttp source code of Android network framework (1) -- request process After explaining the request process of OkHttp, this article enters the second part - OkHttp interceptor analysis. Interceptor analysis of ...

[Reprint] Link to the original text JNI_NDK Getting Started Details In Android development, for a variety of reasons (cross-platform, high performance, sensitive data processing, etc.), a well-known JNI(Java Native Interface) is needed. This article will take you to review some common points of knowledge in JNI. So there are no explanations ...