iOS Development calculates a time interval of two dates

First create a formatted objectNSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];[Dateformatter setdateformat:@ "Yyyy-mm-dd HH:mm:ss"];Then create a Date objectNSDate *date1 = [dateformatter datefromstring:@ "2020-10-31

IOS Custom Control Development

Work required, recently working on an iOS chart. Find a lot of third-party library can not achieve effect, so decided to write a control.#0 goalsHopefully you can write a common chart control (for this project only), although the development is more

Android--leakcanary

Https://github.com/square/leakcanaryWe tried some methods, but none of them solved.For example:1. Use bitmap's Bitmap.Config.ALPHA_82. Capture an Oom exception, then go to GC to reclaim it, and then recreate 3. We didn't expect to collect bitmap

IOS drop-down menu multiplexing

Since the previous use of the drop-down menu, so now take some time to go back to carefully organize a bit, gradually improve the drop-down menu, and provide some more basic functions, so that in future if necessary, can be reused, and provide to

okhttp--basic usage of Android web development post

1, the Okhttp framework uses the Okio framework, do not forget the next Okio.jar2, through post access to the network, and through get access to the network basically the same, more than the process of setting request parameters. It is divided into

Set Android ADB environment variables in Mac

1. Locate the local path of the Android SDK,ADB command under Platform-tool, credited as xxxxMy path is (/applications/eclipse/android-sdk-mac_x86/platform-tools)2. Open Terminal inputTouch. Bash_profileOpen-e. Bash_profile Point Enter3. Add a

Android Learning Note andbase Framework Learning (ii) Using the encapsulated Progress box, Toast box, popup box, confirmation box ...

PS: Gradually understand, stay in the laboratory for three years is better than a year in the enterprise ...Learning content:1. Use the Abactivity internal encapsulation method to implement the Progress box, Toast box, popup box, confirmation box ...

Use the latest and coolest Android development technology

The first development tool is certainly not for Eclipse, but for Android studio. The API version must, of course, be 23+ to support CardView, Receiveview, percent layouts, and so on.There is also the introduction of Android support V7, Android

Hybridapp Development Library

When you develop your app, use HTML5 to develop some pages that are integrated into iOS and Android to save time and effort. So what are the main libraries that can be used?This article focuses on three: PhoneGap, Dcloud, Reactnative, and has made

Ubuntu Create WiFi hotspot (Android recognizable)

How do I create an Android-aware hotspot under Ubuntu system? Wi-Fi hotspot created in general environment Android device is not recognized, next to you to talk about how to create an Android-recognized WiFi hotspot under UBUNTU14 Method:

Use of Eclipse development tools-debug Android app using Eclipse's debug

1. Set breakpoints, double-click the boundary of Eclipse editing interface, or right-click the boundary of Edit interface, shortcut key ctrl+shift+b.2, the F11 key starts the debugging program, the program installs to the handset, does not run

Android SQLite app optimization (data collation)

1. Optimized insertion speed  A. Do not bind empty columns In my program, at least 50% of the columns are empty values. When a null value column is encountered, the Ih.bind () method is not called to bind it, and as far as my program is

Learn about Gradle in Android studio

Always heard that Gradle is very powerful, just occasionally when you create a demo with Android studio to see him once, today take a full record of time.1.gradle positionAfter the Android Studio project is created, the default is 3 Gradle files,

Android 74 Download text

Page:LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:tools= "Http://schemas.android.com/tools"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"Android:paddingbottom=

Android Touch mode and Focusableintouchmode analysis

Reprinted from Http://www.cnblogs.com/xiaoweiz/p/3833079.htmlFirst, let's look at the definition of touch mode. It is a state of the view hierarchy when the user interacts with the phone. It's very easy to understand,Represents whether the most

Android uses NDK to compile so the simplest way

In fact, as long as there is a JNI folder, and then put a android.mkLocal_path: = $ (call My-dir) include $ (clear_vars) local_module : = hello-jnilocal_src_files: = Hello-jni.cinclude $ ( Build_shared_library)and put a hello-jni.c.#include

What are the methods, classes, or interfaces that make you feel brief encounter in Android development?

Activity.startactivities () is often used to start other activity in the middle of an application.Textutils.isempty () Simple tool class for detecting whether it is empty.Html.fromhtml () is used to generate an HTML parameter, which can be a string.

Android system services at a glance

System_server processMore services running in the system server process, which is the foundation of the entire Android frameworkNative ServiceSurfaceflingerThis is a service that framebuffer synthetic services that synthesize logical window image

Volley--volley basic usage of Android network development (iii)

1, imagerequest usage and stringrequest, mainly divided into 3 steps:(1), Instantiate a Requestqueue object(2), set the Imagerequest object parameter, and add the Imagerequest object to the Requestqueue queue(3), Execute Start () method2.

Cocos2d-x trip _ 39] simulate a switch in LUA

Cocos2d-x trip _ 39] simulate a switch in LUA   This is actually not difficult, but a friend told me that he encountered the question "Please use lua to simulate Switch" during the interview ...... I think of sharing my previous articles ...... The

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