how to create vpn for android

Create Options MenuAs mentioned earlier, the activity of Android has created a Android.view.Menu object for us in advance and provided a callback method Oncreateoptionsmenu (Menu menu) for us to initialize the contents of the menus. This method will only be executed when the option menu is displayed for the first time, and if you need to dynamically change the contents of the Options menu , use onPrepareOpt

Android Development Series (27th): Use ProgressDialog to create a progress dialog box The progress dialog box is common in common applications, such as downloading, opening a page, transferring a file, and so on. It has a circular shape and a long shape. These two types You can create a progress dialog box in either of the following ways: 1.

in Android, there are two ways to create a dialog box:1. With the dialog class, or its subclasses (such as Alertdialog)2. Use Activity's dialog box themeUse the dialog class:Let's take a look at how to create a dialog box with the dialog class, first, we need to define a subclass that inherits the dialog class:Class Mydialog extends Dialog {Public Mydialog (Conte

Build an android ORM framework opendroid (2) -- automatically create a database In the previous blog "Create an android ORM framework opendroid (1)-use An ORM framework", I believe you have learned about the use of opendroid. From this blog, we officially went to opendroid's source code analysis to build our own ORM fr

Java Native Interface (JNI) is a bridge between Java and C/s + +. In some cases, to improve the performance of Java programs and extend the functionality of Java programs, we need to use JNI. For example, when we download a JDBC jar package, we can see the dynamic link library containing the different platforms in the database: This article describes how to create one of the simplest JNI dynamic link libraries for the

Android Framework training teaches you how to create an efficient image loading framework1. Overview There are not many good image loading frameworks, such as UIL, Volley, Picasso, and Imageloader. But as a qualified programmer, I must understand the implementation principles. So, today I will bring everyone together to design a picture frame that is loaded into the network and locally. Some people may say

Android Studio is a new IDE released at the google I/O conference. Based on IntelliJ, Android development has an alternative to Eclipse. In Android Studio, how does one add an Activity to the current project? Right-click Java or package name, new -- Android Component In Kind, the default value is Activity. Howe

/TableLayout/12. Cell SpanningViews/Lists/1. ArrayViews/Lists/10. Single choice listViews/Lists/11. Multiple choice listViews/Lists/12. TranscriptViews/Lists/13. Slow AdapterViews/Lists/14. Efficient AdapterViews/Lists/2. Cursor (People)Views/Lists/3. Cursor (Phones)Views/Lists/4. ListAdapterViews/Lists/5. SeparatorsViews/Lists/6. ListAdapter CollapsedViews/Lists/7. Cursor (Phones)Views/Lists/8. PhotosViews/Lists/9. Array (Overlay)Views/Progress Bar/1. IncrementalViews/Progress Bar/2. SmoothView

directly into the project, or build it using Gradle to add compile dependency: dependencies { compile ' com.android.support:appcompat-v7:+ ' compile ' com.android.support:cardview-v7:+ ' compile ' com.android.support:recyclerview-v7:+ '} Put the above apptheme style to Res/values-v21/style.xml, and then res/values/style.xml add a Apptheme, as follows: This can be done in much the same way as material Design, but there are some effects that cannot be achieved because the low version do

To compile an android program, you must install JDK, eclipse, and Android SDK. The installation path of the android SDK should not be in program file or program file (x86); otherwise, it will be very strange during debugging. It is best to directly put it in c: \ android. (If you want to put it under program files, you

1. Create a HelloWorld program 1.1 new-android ApplicationClick File-new-android Application The following screen appearsFill in the Application name, project name, package name, select the minimum required SDK version, target version and compiled version, next nextSelect an activity, the default is blank. Then finish.The good one

PrefaceThis chapter provides a very practical function-download online videos. We also need to think about the product design and how to better integrate the newly added functions into existing products when it comes to multithreading, thread update, and other technologies, it's not just a simple interface. You are welcome to discuss product design and technical details! StatementWelcome to repost, but please keep the original source of the article :) blog Park: http://www.cnblogs.com farmer UNC

We want to develop our own media player on Android. The first thing we want to think of is to use FFMPEG for implementation. FFmpeg is a cross-platform failover function. We can call the APIS provided by FFMPEG to complete the process. In addition, FFMPEG provides a small program ffplay, which itself is a media player, so we plan to use ffplay as the program's basis. Below is the development environment I used this time: -Cygwin-

[Android] Create a tab with fragment, androidfragment Interface layout, linear layout, horizontal arrangement, and average center Distribution Four textviews, 0 dip in width, 1 in weight, and center content Use the LinearLayout control to set the id of the subject content. Creates four Fragment Option Classes that inherit the Fragment class of the system. Override onCreateView () to return a View object

++ ++ This article is original on this site. You are welcome to repost it! Reprinted please indicate the source: Http://blog.csdn.net/mr_raptor/article/details/7401178 ++ ++ Create a Java object in local C code The object used to create the Java domain is to create an instance of the Java class and then call the construction method of the Java class. Taking the

Android must know-create NinePatch images, This article provides notes for the free CSDN course NinePatch image production from entry to mastery. It is recommended that new users watch the video first, so that they can easily review the notes, friends with NinePatch basics can directly watch Part 4. -- [Reprinted, please specify the source] I. Introduction to tools This is a PNG image. In

This article is translated from the Android custom ListView in Ravi Tamada blog with Image and Text using volleyFinal effectThis listview presents some film and television information, each line is a piece of information about a movie, each row has a picture of the film, the name of the movie, the rating, type, year and other information.1.json dataWe parse the JSON and get the data, the JSON data includes the JSON array, each JSON array is a JSON obj

Android uses its own Junit to create a test project, androidjunit 1. Create an Android Project Package com. shellway. junit; public class Service {public int divide (int a, int B) {return a/B ;}}Service. java. package com. shellway. junit; import junit. framework. assert; import an