how to create database for android app

In early January this year, I started to think about it. I am a pure android client programmer, but I want to develop a mobile small bbs forum application by myself. What should I do if I have no server? What if there is no database? What should I do if all programming on the server is forgotten? So I had an idea: Using Baidu push to push commands and data to the client, the client responded to the request

Android app source code: Train count and flight info query, android train count Project Description: This project is an application source code for querying train and flight information. It can be used to query the number of trains and flights between a city and another city, you can also add it to your favorites for future use. The train information and flight

Guo XiaoxingWeibo: Guo Xiaoxing's Sina WeiboEmail:[email protected]Blog: http://blog.csdn.net/allenwellsGithub:https://github.com/allenwellsA photo-enabledRequesting Camera access... > "android.hardware.camera" android:required="true" /> ...If our app uses a camera, but the camera is not a necessary component for the app to function properly, you can set the android:required to "false

Allows your Android app to use multiple themes (Part 2) In the first part of this post, we have created a light theme and made initial preparation to support multiple themes. in this blog post, we will continue that effort, creating another theme and allowing dynamic switching of themes during runtime. In the previous blog, we created a bright style topic and made some preparations for using multiple theme

The first app to be written right now is Geoquiz, who can test the user's geographic knowledge. The user answers the question on the screen by clicking the True or False button, Geoquiz can instantly feedback the answer correctly or not.Figure 1-1 shows the result of the user clicking the false button.　　1.1 Application Basics　 The Geoquiz application consists of an activity and a layout.　　activity is a specific instance of the activity class in the

Situation BriefIn the process of developing an Android app, there is a need to launch a service in the app that runs in a standalone process, keeps a long connection to the server, displays the message that the server pushes over the notification bar, and sets the click action. Click to jump to the corresponding activity in the

[Android app] obsessive-compulsive Avatar generator, android obsessive-compulsive disorder Recently, in the circle of friends, I added a red and white number in the upper right corner of my profile picture, so that many obsessive-compulsive students can keep chatting and admire the girl who invented this kind of profile picture. But it cannot be customized, which

official text: "Common Intents" or my translator's blog: "Android Official document app Components (Common Intents).Start activity and return results (starting an activity for a result)In order to get the result of initiating activity, you can call the Startactivityforresult () method instead of the StartActivity () method, and the Onactivityresult () The callback method receives the result (obtained from

Longer build times will slow down project development, especially for large projects where the app is built for a long time of more than 10 minutes, short minutes, long build times have become a bottleneck for development, and this article is based on Google's official documentation, plus some of its own understanding to provide some optimization suggestions to improve the speed of the app build.1,

file in the jni directory automatically generated by the project and change it. c extension file, because this case is based on the c language, and then modify the Android. the LOCAL_SRC_FILES In the mk file is. c file. copy the signature file in method h to the jni directory. 3. Write C code As analyzed in the above principle, we cannot implement such a function using Java. We can only clone a sub-process of the current

Use the LogPhoneUtil tool class to save APP running logs on Android phones, and android log tool class Recently, the company's tests have always proposed such a bug. Of course, they also blame their code for poor writing. Therefore, the test will always crash the app, and there is no log printing when they crash, when

This article illustrates how Android implements a Third-party app that uses micro-letters to log in. Share to everyone for your reference, specific as follows: Using the micro-letter login app, eliminating the registration process, there are many similar applications now. The integration of this functionality is not complicated, but there are some areas to be aw

) by default, so that the App response speed will be affected. It will cause the program to get stuck, die, or even cause a system error. To speed up the response, you need to move time-consuming operations (such as network requests, database operations, or complex computations) from the main thread to a separate thread. The most efficient way is to complete this operation at the class level. You can use As

remote source.Let's get the default and icloud sources separately, as we've analyzed above:sourcesourcesourceTitle:@"iCloud"sourcesourcesourceTitle:@"Default"];Three. Get the specified calendar from the calendar sourceNow that we've got a calendar source, how do we get one of those calendars? The calendar in Eventkit is represented as an instance of Ekcalendar, and we also write a helper method:type:(EKCalendarType)typeinSource:(EKSource*)sourceforEventType:(EKEntityType)eventType{ forin [so

the clothes you wear, making it easy for shopaholics who cannot try clothes to see the effect or are too lazy to enter the fitting room. New supplement: 20. Create a carpool application, holiday carpool, and commuting carpool application.The Android mobile app is developed. This app includes commuting vehicles (duplic

Write the first Django app, part one--Create a project Let's learn by example. Through this guided tour, we will teach you step-by-step to create a simple voting system. The system is divided into two parts: 1. A public page that allows people to vote and view the results of a poll. 2. An admin page lets you add, modify, and delete votes. We assume that you

application will still function correctly. You can use the standard tools--keytool and jarsigner--to generate key and sign the APK file. Once you have signed the application, be sure to use the Zipalign tool to optimize the final APK package. The Android system does not install and run applications that are not properly signed. This rule applies to any place running Android, whether it's a rea

Document directory Prepare the development environment Create a Mono for Android Application Summary My first Mono for Android app Mono for Android: Learn how to use Mono for Anrdoid to create an

applications, no more nonsense, an example of everything.One, offline application cache HTML 5 Offline application Cache• Add MIME type support on the server: Text/cache-manifestIf you added under Apache:AddType text/cache-manifest ManifestIf it is nginx, add the following:Text/cache-manifest manifest;Or generated by a dynamic program:1Header (' content-type:text/cache-manifest; Charset=utf-8 ');• Create Name.manifest:New manifest file manifestCACHE

Android API Guides --- App Widget HostApplication Widget hostAndroid available on most Android devices ?? The oid home screen allows users to embed application gadgets for quick access to content. If you are building a home replacement or similar application, you can also allow users to embed application components by implementing AppWidgetHost. This is not somet