android 4 2 emoji

Notation 1: Inner classDefine an inner class to implement the Onclicklistener interface, and then register an instance of the inner class with the button.Notation 2: Anonymous inner classnotation 3: Let the activity implement Onclicklistener interface, through this to register button click event, the replication OnClick method, by judging the view, centralized processing each button click event. This method is the most commonly used method for having

Android Baidu map SDK v3_3_0 (4), androidv3_3_0 Reprinted please indicate the source: http://blog.csdn.net/tanzuai/article/details/43833125 Functions to be implemented in this blog First: The above is what we will achieve. 1. First, we will introduce the functions to be implemented: A. Change the coordinates B. Change the coordinate icon C. Delete the icon D. The coordinates change at intervals. Clear. cle

1. Activity2. Broadcastreceiver3.services4.contentProviderA. The broadcast recipient ,---------------trigger the Onreceiver method when the specified broadcast is received. This class needs to inherit Broadcastreceiverpublic void OnReceive (context context, Intent Intent) {Broadcast triggers need to be included in the configuration listCan also be configured by codeRegistration of broadcasting, cancellation of registration Unregisterreceiver (receiver);New mybroadrecastreceiver (); // Create Int

is not very good, does not recommend Method 2:onuserleavehint Method Copy Code code as follows: @Override protected void Onuserleavehint () { LOG.D ("Aeon", "Onuserleavehint"); Super.onuserleavehint (); } This method will be executed before onsaveinstancestate, and this method is more appropriate according to the API explanation. Method 3:action_close_system_dialogs Action_close_system_dialogs can be used in radio m

Java 4 Android class and object initialization1. Member Initialization Java tries its best to ensure that all variables can be properly initialized before use. 1) local variables of the method. Java implements this guarantee by compiling errors. Eg: void f(){ int i; i++; //Error , i not initialized}2) data member of the class. If it is a basic type, they a

Android callback function 2: application instance and android callback function If you do not understand the android callback concept, see android callback function 1: Basic concepts. 1. Define Interfaces package com.app.util;public interface ZYJCallBack { public void data

Android interview questions (2) and android interview questions 1. What is the difference between int and Integer? Java provides two different types: The reference type and the original type (or the built-in type ). Int Is the original data type of java, and Integer is the encapsulation class provided by java for int. Java provides encapsulation classes

combine with RadioButton to show the effect of multiple choices? Let's look at the XML and we'll know:1 XML version= "1.0" encoding= "Utf-8"?>2 LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"3 android:orientation= "vertical"4 Android:layout_width= "Fill_parent"5 Android:layout_height= "Fill_parent"6 >7 Radiogroup8 Android:

1. Picture in SDcardBitmap imagebitmap = bitmapfactory.decodefile (path) (paths are images, and directories are/sdcard)2. Picture below the Res folder of the projectGet Application ObjectApplicationInfo appInfo = Getapplicationinfo ();Get the image ID (name is the name of the picture, "Drawable" is the directory where the picture is stored, Appinfo.packagename is the app's package)int resID = Getresources (). Getidentifier (Name, "drawable", appinfo.p

Original address: http://www.developerphil.com/android-studio-tips-of-the-day-roundup-4/33. Analyze data flow to current locationApple/windows: No corresponding shortcut key, you can choose Analyze->analyze Data Flow to here in the menuBy analyzing the currently selected variable, parameter, or domain variable, this function gives a path map that flows through the current position. This is useful when you a

Introduction of Criminalintent Project development 1.fragment Using fragment instead of activity to manage the app UI, you can circumvent the limitations of the Android system activity usage rules. Fragment is a controller object that the activity can delegate to accomplish some tasks. These tasks are typically administrative user interfaces. The managed user interface can be part of a full screen or a full screen. Fragment

————————————————————————————————————————|wangkuifeng0118| Address: http://blog.csdn.net/wangkuifeng0118/article/details/7028953————————————————————————————————————————Content Provider belongs to one of the components of an Android application, and as the only way to share data between applications, content Provider's primary function is to store and retrieve data and provide access to data to other applications.The

Build an android universal pull-down refresh framework-XRefreshView (2), android pull-down refresh I. Preface Since the last release of the XRefreshView (1) framework for building an android universal pull-down and refresh framework, it has been very busy for more than half a month, however, I update and maintain XRefr

Android Internship notes (4)---Fragment (fragmentation) Basic concept analysisReprint Please specify source: Coder-pigFragment believe that everyone will be unfamiliar, slide, drawer effect, dialogfragment ah, and so on, a lot of places willUsed to fragment, for the basic concept of fragment in the previous article has actually given, here review again,Warm so know new well, combined with Google's official

(new MyButton ());Button2.setOnClickListener (new MyButton ());Button3.setOnClickListener (new MyButton ());Button4.setOnClickListener (new MyButton ());Button5.setOnClickListener (new MyButton ());}Class MyButton implements OnClickListener {@ OverridePublic void onClick (View arg0 ){// TODO Auto-generated method stubSwitch (arg0.getId ()){Case R. id. button_alpha:Alpha ();Break;Case R. id. button_rotate:Rotata ();Break;Case R. id. button_scale:Scale ();Break;Case R. id. button_translate:Transl

An Android app can contain zero or multiple Acivity values. When your application contains multiple activities, you usually need to jump between them. In Android, Intent components are required to complete these operations.The best way to understand this important and abstract concept is to try it. The following example shows how to jump between two activities.1. Create a project named UsingIntent.

= "40dip" Android: textcolor = "# FFFF00" Android: layout_torightof = "@ ID/TV1" Android: text = "Layer 2"/> Android: Id = "@ + ID/TV3" Android: layout_width = "wrap_content" Android:

Source: http://www.imooc.com/code/1432The function of continue is to skip the remaining statements in the loop body to perform the next loop.For example, to print all the even numbers between 1--10, use the continue statement to implement the code:Operation Result:TaskImplementation function: Ask for all even numbers between 1 and 10.Implementation of the idea: Define a variable sum to save the cumulative value, define a variable I save 1 to 10 integer, iterate and judge, if I cannot be divisibl

Android is now implementing the tab type interface more and more, today the common implementation of the way to give you a summary. It is now written: 1, the traditional Viewpager implementation 2, Fragmentmanager+fragment implementation 3, Viewpager+fragmentpageradapter implementation 4, Tabpageindicator+viewpager+fragmentpageradapter 1, the traditional Vie

its own Dalvik virtual machine instance.3. Application Framework LayerThe core application of the various api,android that may be used to build the application is to use these APIs, and developers can use these APIs to build their own applications.4. Application LayerApplications are all part of this layer, contacts, SMS, games, etc. are all.Summarize: The 1 A