Programmer Group

In Android applications, we use the intent mechanism to jump between activities. This example simply introduces how to use intent to make the program jump from MainActivity to another OtherActivity to realize a single parameter value. When returning MainActivity, use Bundle for batch return. 1, Design interface 1. MainActivity la ...

Because of the need of the project, make an Android program, which can send instructions to control the printer, and use socket programming. Because I don't know about Android, I simply record some completed test applets Click Connect to connect to the server Click send to send helloWord to the server. The server uses ...

Please be patient to read this module because of its large content and length. My module is divided into four parts [ ] My interface [ ] Set up interface [x] Modify password interface [x] Set Secret Security and Retrieve Password 1. Modify Password 1. Create a password modification interface In the com.boxuegu.activity package, creat ...

1. Get the current Activity instance through topActivity of RunningTaskInfo. The Activity obtained in this way can only ensure that it has executed the Activity.onCreate method, but not the Activity.onResume method. This method has been banned since api 21 and should be used with caution. public static String getCurrentActivityName(Conte ...

Sliding tab bar is very common in App. I tried to implement one by myself in the past. Using HorizontalScrollView and ViewPager, now TabLayout is much more convenient. First, the effect map and UI are slightly ugly. Don't mind ha ~ PS: there is a source code link at the bottom design sketch No nonsense, just code! ...

The steps to use Litepal are as follows: 1. Introduce JAR package and change configuration Use Android Studio to add: dependencies { compile 'org.litepal.android:core:1.6.1' } 1.6.1 is the version number, which can be changed according to the requirements. Then configure the litepal.xml file. Generally, create ...

When doing a project, it is often necessary to collect some equipment information, but it is not often used, so sometimes it will query which interface the requirements meet, so it will be sorted out at the weekend Build.ID； //Either a changelist number, or a label like "M4-rc20". Build.DISPLAY； //A build ID string m ...

android Four ways to realize timer in The first way to use Timer and TimerTask 1. Inheritance relationship java.util.Timer Basic methods schedule For example: timer.schedule(task, delay,period); //Delay is long,period is long: after delay milliseconds from now on, it is executed every period milliseconds. The schedule method has three ...

1. Prerequisite preparation Today, I reviewed the joint use of TabLayout and ViewPager, and wrote a demo to deepen my understanding. First, make sure that TabLayout is under design, not under the original widget of the system. So first, add the following reference to the dependencies closure of build.gradle under app: ...

In line with what is written in this article Android RecylerView multi layout optimization Extract the MyAdapter and write a jacenrecylerview Adapter. It can basically realize some simple pages without writing so many adapters. Don't say much, post code directly. /** * For the time being, I'd like to integrate multip ...