messenger application for android

This article describes the Android programming implementation to add a menu to the application method. Share to everyone for your reference, specific as follows: There are many ways to add menus, and it is generally recommended that you create menus with XML. To establish the menu step: Create a menu folder under Res and add an XML file inside the menu file: To add a menu to an

Bulid.gradle (Module:app) dependencies { compile filetree (include: [' *.jar '], dir: ' Libs ') testcompile ' junit:junit:4.12 ' compile ' com.android.support:appcompat-v7:24.1.1 ' compile ' cn.pedant.sweetalert:library:1.3 ' } Introduction: Compile ' cn.pedant.sweetalert:library:1.3 ' New error message appears for build app: Error:execution failed for task ': App:processdebugmanifest '.Manifest merger Failed:attribute Application

As a popular open-source system, the Android mobile phone operating system plays an important role in the mobile phone field. In the Android system, all applications installed on the system must have an Android digital certificate used to identify the author of the application and establish a trust relationship between

This paper introduces the application of Tablelayout in Android, and has some learning value for Android beginners. Specifically as follows: Tablelayout and Tablelayout is a group of collocation use of the layout, Tablelayout, TableRow in the tablelayout above, and button, TextView and other controls on the TableRow above, in addition, Tablelayout can also be pl

Many times, the use of touch screen fling, scroll, such as gesture (gesture) operation will make the user experience of the application greatly increased, such as using scroll gestures in the browser to roll the screen, with the Fling in the reader page and so on. In Android, gesture recognition is done through the Gesturedetector.ongesturelistener interface, but William Rummaged through the official

When you develop an application, you often encounter situations where you can dynamically determine which view or layout is displayed based on criteria at run time. The most common idea is to write all of the views you might use on them, first set their visibility to view.gone, and then dynamically change its visibility in the code. The advantage of this approach is that logic is simple and control is more flexible. But its disadvantage is that it con

When you develop an application, you often encounter situations where you can dynamically determine which view or layout is displayed based on criteria at run time. The most common idea is to write all of the views you might use on them, first set their visibility to view.gone, and then dynamically change its visibility in the code. The advantage of this approach is that logic is simple and control is more flexible. But its disadvantage is that it con

What is applicationApplication and Activity,service are a system component of the Android framework, and when the Android program starts, a Application object is created to store some information about the system. Usually we do not need to specify a application, then the system will automatically help us to create, if

This article mainly describes the theoretical knowledge about Android Application signatures, including: What is a signature, why is it necessary to sign an application, and how to sign an application. 1. What is a signature?If this is not a question in Android development,

In the code often see application This class, always do not know what this is for, today just a bit of time, so carried out the detailed study.First, the overall concept of its interpretation:The description of him in the Android source code is;* Base class for those who need to maintain global application state. You can* Provide your own implementation by specif

Hello everyone, this is a simple Android demo, just a simple prototype. The interface design is also a little ugly ~ Take a look at the following: Step 1: Train of Thought Analysis Three Controls, edittext, button, and webview, are used from the interface. There are actually four toast controls that are used to prompt when the query content is empty. We enter the query content in edittext, which includes Chinese and English. Then, obtain the data

file name is used as the resource ID. Compiled resource type (compiled resource datatype ): The resource points to an AnimationDrawable object. RESOURCE REFERENCE) In Java code: R. drawable. filename In XML: @ [package:] drawable. filename SYNTAX (SYNTAX ): Android: oneshot = ["true" | "false"]>Android: drawable = "@ [package:] drawable/drawable_resource_name"Android