Programmer Group

Handler asynchronous message processing mechanism Asynchronous Message processing in Android mainly consists of four parts: Message, Handler, MessageQueue and Looper. Message: responsible for inter thread message delivery Handler: used to send and receive information MessageQueue: the queue used to store messages. Each thre ...

Zero, preface Open the frontactivity, open the ToActivity through the button to return the result, and at the same time add the data to the intent, Fill TextView with data in onCreate method of ToActivity. Press the return button to pass the ToActivity data to FromActivity, verify the returned result in onActivityResult metho ...

Integrated practice of id location -- automatic login Test scenario 1. Start the App and enter the login interface 2. Enter the user name "self study network 2018" and password "zxw2018" on the login page and click login. requirement analysis 1. The modules that detect and upgrade the pop-up window and the gu ...

Not much, above Recently, the app needs to make a level display. I look at the UI chart and only show the real stars (lit stars). As shown in the figure below But most of the online examples of star rating are like this Show the stars of modesty By customizing View package com.starsbar; import android.content.Context; import a ...

10.ScrollView When the content to be displayed on the interface is larger than one screen, we will use scroll view or subclass of scroll view. ScrollView can only scroll up and down. However, HorizontalScrollView can only slide left and right. However, there can only be one view in the scrolling view, so it is common to place m ...

Intent can be understood as a messenger (intention), which cooperates to complete the communication between Android components. Intent to realize page Jump 1. Jump from page A to page B directly: startActivity(intent) 2. Start page B directly, and cut page B to return data to A: startActivityForResult(intent,requestCode), U ...

Recently, I fell in love with Android APP. I read some data and wrote while learning. It's just a hobby to pass the time. The tool is Android studio 3.0.1. In order to be lazy, I'm going to write a dictation APP for my children. The idea is to download the audio resource package from APP to SD card at that time. The APP plays an ...

[Objective] to achieve fuzzy search of multiple fields in the table. [method] ORM Lite like Method: like(columnName,pattern) uses the% wildcard to match, specifies the row data, and returns the matching result Usage demonstration: mDao.queryBuilder().where().like("LastName", "A%").query(); match the LastN ...

Zero, preface 1. Open RedActivity and click the screen to enter BlueActivity. At this time, RedActivity moves out to the left and BlueActivity moves in to the left 2. Click the back button, BlueActivity moves out right and RedActivity moves in right Default jump mode: Effect of this case: 1, Test class 1. Red Activ ...

preface Create a new project directly under Android Studio and you can use it! I. Gradle settings file settings.gradle is used to indicate which modules Gradle should include when building an application. Only app module is included here include ':app' II. Top level construction documents Look at build.gradle of the project under ...