android app development tutorial beginner pdf

through the StartService method Background process: a process that has an invisible activity (the OnStop method is called) Empty process: No process with any active app components Status of Phone recorder phoneCall to detect the status of the phone, using the broadcast mechanism. Idle state (phone hangs up) TelephonyManager.CALL_STATE_IDLE Ringing status TelephonyManager.CALL_STATE_RINGING Off-hook status (in call) Te

server is the use of JSON communication, but on second thought, there are two drawbacks to doing this, 1: There are many players in the list is repeated, this will produce a lot of repeated loading, wasting bandwidth, increase the waiting time; 2: No way to cache, or to do cdn! Later think that still pass the URL good, this way, the client can load the data asynchronously, but then thought, if the user first opened, then can be saved to the local, waiting for the second time to load the local d

will not start a new activity until it gets to the top. Let's say I now have a, start B in a, and add this tag to the intent in a. At this time B is to flag_activity_brought_to_front this start, at this time again in B again start c,d (normal start c,d), if this time in D again start B, this time the last stack is a,c,d,b. It is particularly important to note that Do not misunderstand this: A,b,c,d are standard loading, and then I start a in D, this intent plus flag_activity_brought_to_front, w

,};builder.setMultiChoiceItems(items, checkedItems, new OnMultiChoiceClickListener() { //点击某个选项，如果该选项之前没被选择，那么此时isChecked的值为true @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { checkedItems[which] = isChecked; }});builder.setPositiveButton("确定", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { StringBuffer sb = new StringBuffer(); for(int i = 0;i Progress Bar dialog box

|= mdoubletaplistener.ondoubletapevent (EV) ; } else {//This is a first tap mhandler.sendemptymessagedelayed (tap, Double_tap_tim EouT); } } ......} Private Boolean Isconsidereddoubletap (Motionevent firstdown, motionevent firstup, motionevent seconddown) { if (!malwaysinbiggertapregion) {return false; } final Long deltatime = Seconddown.geteventtime ()-firstup.geteventtime (); if (Deltatime > Double_tap_timeout | | deltatime detailed to be able to

occupies 1/3 of the space. If you add a third view and the weight is set to 1, then the first view (with a weight of 2) occupies 1/2 of the space, and the remaining two view accounts for 1/4. (Note that the premise of the use of weights is generally set to 0DP for the width or height of the view, then the system calculates the space that the view should occupy according to the weight rules above.) However, in many cases, if the view is set to the Match_parent attribute, then the above calculati

Php for Android server development-json xml universal app Data Communication Interface encapsulated by php Php file: test. php is a common communication class $ Code, 'message' => $ message, 'data' => $ data,); if ($ type = 'json') {self: json ($ code, $ message, $ data); exit;} elseif ($ type = 'array') {var_dump ($ result);} elseif ($ type = 'xml ') {self: x

)) //{Order = Orderdao.getorder (orderId);if(order!=NULL) {System.out.println ("Update payment status:"+orderid); System.out.println ("Paytime"+paytime); Order.setorderpaystatus (1); Order.setorderpaytime (paytime+". 0"); Order.setorderqueryid (Orderqueryid);//order.setorderpaytime (New SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss"). Parse (paytime)); Booleansucess = orderdao.update (order); System.out.println ("sucess"+sucess); }//}

In the process of developing an application, it is necessary to carry out the corresponding unit test.Next we write a simple Android application to complete the basic unit testFirst, we need to build an Android project, named JUnit.Then, create a service class, which is the class Personservice.java that needs to be tested:Package Cn.itcast.service;public class Personservice {public void Save (string usernam

controlPowerManager pm = (powermanager) mactivity.getsystemservice (Context.power_service); WakeLock Mwakelock = Pm.newwakelock (Powermanager.full_wake_lock,tag); Mwakelock.acquire ();//Do what you want to do.。。 Mwakelock.release ();Newwakelock has three different options for the first number of references:Powermanager.partial_wake_lockPowermanager.screen_dim_wake_lockPowermanager.screen_bright_wake_lock10, Android:windowsoftinputmode1, when the focus is generated, the soft keyboard is hidden o

relative to the middle of the screen, not the absolute position of the screen. Run:3 Insert Picture degrees in the content text and buttons of the dialog box: I have described inserting images in TextView in the TextView advanced app for Android development , and this technique works equally well in dialog boxes. The code for inserting a picture in the dia

First onIn fact, when just bought HTC G8 (at that time the price of Beijing is still 6,100 flat), Android 2.1, 2.3 has been the development of Android interest, but later did not get it ...Today, I suddenly remembered that there was not even a game on my cell phone and I was going to develop one.On the internet to find some, see understand the principle of the la

Android app add advertisement tutorialTo obtain the Android Advertisement Management Library and display advertisements in mobile apps, you must add an advertisement management library in the app, the current version of the Keymob ad management library is 20150801. After downloading and decompressing the library, you c

have VMware installed, you can save the previous step, and then on the VirtualBox host-only network, right-click-Properties-Find ipv4--double-clickChange the top to automatically get it!(18) In addition, there is a frequently encountered problem:error message state that genymotion can ' t load OpenGL libraries?Probably contains opengl, meaning that your video card will not support the OpenGL2.0, if you encounter such a problem, only need to update the latest graphics driver on it! (Recommended

This article is a summary of my personal development of the Camera APP. It mainly introduces the basic usage and precautions of FaceDetection. If you have any mistakes or deficiencies in this article, you are welcome to criticize and correct them.1. FaceDetection1. Version supportFaceDetection is Android (Android Vers

Intent email =NewIntent (Android.content.Intent.ACTION_SEND); Email.settype ("Plain/text"); String[] Emailreciver=NewString[] {"[Email protected]" }; String EmailSubject= "Brewclock Feedback"; String Emailbody= "";//Set mail default addressEmail.putextra (Android.content.Intent.EXTRA_EMAIL, emailreciver);//Set message default titleEmail.putextra (Android.content.Intent.EXTRA_SUBJECT, emailSubject);//set what you want to send by defaultEmail.putextra (Android.content.Intent.EXTRA_TEXT, emailbody)

Android development tutorial, Android tutorial First download two software packages 1. Download the SDK:Http://dl.google.com/android/installer_r24.0.2-windows.exe If the browser cannot be accessed, Copy the above address to thunde

I. Build an Android App project1. Running Eclipse.exe2. See3. Enter the interface4. Enter the app, project, package name5. Select the workspace path that the project establishes;6. Configure features such as icons and backgrounds7. Select the Activity's page format8. Set the corresponding name9. Build the ProjectTwo. Project Introduction1. The interface can use t

Add Umeng statistics to the Android app. The MacbookProMGX72AndroidStudio1.3.2Genymotion simulator is a mobile application statistical analysis platform. It can help add Umeng statistics to Android apps Software and hardware environment Macbook Pro MGX 72 Android Studio 1.3.2 Genymotion simulator Preface Umeng is a

Com.ferris.view;import Android.content.context;import Android.support.v4.view.viewpager;import Android.util.attributeset;import Android.view.view;public class Myviewpage extends Viewpager {public MyViewPage ( Context context) {super (context);//TODO auto-generated Constructor Stub}public myviewpage (context context, AttributeSet attrs) {Super (context, attrs);//TODO auto-generated constructor stub} @Overrideprotected Boolean CanScroll (View V, boolean checkv, int dx, int x, int y) {if (v! = T