android application development book

Android Application Development generally separates the UI and data into the application side (focusing on the performance of the entire application) and the UI side (mainly interface display) data logic side (mainly the API encapsulation for interaction with the background)

android:name="Android.intent.category.DEFAULT"/> data android:scheme="sms" /> data android:scheme="Smsto" /> intent-filter> -- intent-filter> action android:name="Android.intent.action.SEND"/> category android:name="Android.intent.category.DEFAULT"/> data android:mimetype="image/*"/> data android:mimetype="Text/plain"/> intent-filter>activity>Note : In order to receive intent, we need to include the category of Category_default in the inten

Android Application Development: Genymotion cannot be started After the Virtual Box, Genymotion, and Genymotion plug-ins on Android Studio are installed, the Genymotion Android simulator cannot be connected to the Virtual Box, this is often caused by virtual network configu

Image processing is often used in Android Application Development. Today we will share some tips on getting fixed-width images. In mobile development, memory resources are very valuable and there are limits on the memory space for image loading. Therefore, we will attach images to process the images accordingly. Somet

drive Internal storage space Internal storage SD card: The equivalent of a computer's mobile hard drive External storage space External storage SD card StatusRemove: No plug-in SD card UNMOUNT:SD card is plugged in, but no Mount CHECKING:SD card is being traversed by the system MOUNTED:SDcard can read and write mounted read ONLY:SD card is available, but read onlyGet the remaining capacity of the SD card Chunk size Total number of blocks Number of ava

Simple concepts are the goals pursued by many people, but in actual situations, everyone prefers comparison. They want to make their own things more beautiful. Forgetting simple is the concept of beauty. Simple makes more sense in Android products. First, there are a large number of Android models with different resolutions. A game we make can be played on a large number of machines, with various resolution

First an Android project, then compile and package, compile the. java file into. Class,.class compiled as. Dex, package all the files as an apk, compile the code, and not compile the resources.The. ARSC in the. APK is the index of the resource, which can be indexed when the resource is more than one.signing-signature, the system detects whether the signature is the same, in addition to verifying that the package name is consistent before the

Link Address: http://www.cnblogs.com/lknlfy/archive/2012/03/03/2378328.htmlI. OverviewThis time to do a simple Doodle board application, previously implemented on QT, suddenly think of it to achieve on Android, Hehe, is both simple and interesting.Second, the realizationNew Project Mywall, modify the/res/layout/main.xml file, add a Surfaceview and two buttons inside, use the relativelayout layout, the compl

(Mmvpmatrixhandle,1,false, Mvpmatrix,0);//Draw the triangleGles20.gldrawarrays (Gles20.gl_triangles,0, Vertexcount);//Disable vertex arrayGles20.gldisablevertexattribarray (Mpositionhandle);}If there is a correct calculation and the correct use of the integrated matrix, then the graph will be drawn in the correct proportions, the final look should be the effect of such a child:Now the program can normally display the normal proportion of the graph, it is time for the graphics to add action.

data.If the service is intended to use a client-server interface, by passing it on Intent bindService() , you can bind to the service from other components. For more information, please refer to the service guide. Delivery Broadcast :Broadcasts are messages that can be received by any application. Various broadcasts are delivered for system events, such as when the system starts or when the device starts charging. Intentyou can pass the sendBroadca

(holder);}else{Holder= (Viewholder) Convertview.gettag ();}Holder.tv.setText (Datalist.get (position));Holder.btn.setOnClickListener (New Onclicklistener () {@Overridepublic void OnClick (View v) {Here we use the callback method to manipulate in the activityMtestimpl.onitemdo (position);}});return convertview;}public class Viewholder {Private TextView TV;Private Button btn;}}----------defined interface--------------------------------Public interface Itestimpl {void Onitemdo (int position);}But

memory is too small, garbage collection will be performed frequently, and the collection will be paused for a short period of time. Change -Xms128m -Xmx512m -XX: maxpermsize = 256 m Now create a Java project through eclipse File> New> JAVA Project Enter project name Select "Create project from existing source" and select the root path of the android source code in browse. Note that it is the same as the path because. classpath is copied to the root d

is a View object Baseadapter Two methods that must be implemented First one//系统调用此方法，用来获知模型层有多少条数据@Overridepublic int getCount() { return people.size();} A second//系统调用此方法，获取要显示至ListView的View对象//position:是return的View对象所对应的数据在集合中的位置@Overridepublic View getView(int position, View convertView, ViewGroup parent) { System.out.println("getView方法调用" + position); TextView tv = new TextView(MainActivity.this); //拿到集合中的元素 Person p = people.get(position);

Daily Development and Application of Android Handler message mechanism and code Testing In many cases, we need to create and maintain a View for each component or all UI threads. For example, to update the display of a TextView We cannot directly create sub-threads in the UI thread. We need to use the message mechanism: handler This blog will show you the Handler

Application Packagecom.lgaoxiao.application;Importjava.util.LinkedList;Importjava.util.List;Importandroid.app.Activity;Importandroid.app.Application;/*** A class used to end all background activity * *@authorAdministrator *@see http://java--hhf.iteye.com/blog/1826880 * */ Public classSysapplicationextendsApplication {//using lists to keep each activity is key PrivateListNewLinkedlist(); //to implement a static object that is created every time you

"Android:layout_gravity= "Center_vertical"style= "Android:attr/progressbarstylesmalltitle" >2.Java codeThis.requestwindowfeature (window.feature_indeterminate_progress);Setcontentview (R.layout.main);GetWindow (). Setfeatureint (window.feature_indeterminate_progress, r.layout.progress);Setprogressbarindeterminatevisibility (TRUE);3.feature_left_icon detailedDisplay icon on the leftFigure 5Implementation codeThis.requestwindowfeature (Window.feature_left_icon);Setcontentview (R.layout.main);GetWi

Introduction to MVP Android Application Layer Development and mvpandroid Finally, CSDN was chosen to sort out the knowledge points published over the past few years. This article was migrated to CSDN in parallel. Because CSDN also supports the MarkDown syntax, it's awesome! [Craftsman's water: http://blog.csdn.net/yanbober] Background The reason for this is that

The recent use of a week or so of spare time, finally completed an Android image clipping library, the core function is based on their own understanding of the implementation, part of the code reference to the Android source image clipping application. Now open the code on GitHub for everyone to learn and use, Address: Https://github.com/Jhuster/ImageCropper, the

adds items to the action bar if it is PR Esent.getmenuinflater (). Inflate (r.menu.test_event, menu); return true;}}3. layout fileKnowledgeCommon event listeners in Android:(1) Click event View.onclicklistener: This event occurs when the user touches a component or the arrow key is pressed, and the process is onclick ()(2) Focus event View.onfocuschangelistener: This event occurs when the component Gets or loses focus, and the processing method is On

This article describes how to easily learn JNI data types through examples. All languages have their basic data types. To learn more, you must understand the most basic things. In JNI, we will ask: how is the data type in Java mapped to the C/C ++ local language? Directory: 1. A simple instance analysis 2. ing between Java and JNI Data Types 3. string processing 4. Array Processing 1. In a simple example analysis programming, it is common to PASS Parameters and return values to functions. Here