android app development for dummies pdf

Original address: http://www.javacodegeeks.com/2014/05/simple-tips-to-secure-android-app.htmlHttp://developer.android.com/training/articles/security-tips.html Android already has security features built into the operating system that significantly reduce Application security issues frequency and impact , but as an application developer , we also need to be aware of security issues when developing applicat

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

Guo XiaoxingWeibo: Guo Xiaoxing's Sina WeiboEmail:[email protected]Blog: http://blog.csdn.net/allenwellsGithub:https://github.com/allenwells"Android App Development technology: User Interface" Chapter list The 9Patch image is a special PNG image with a. 9.png suffix, which adds a 1-pixel-wide line around the original image, which determines the scaling r

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

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

adaptation, but also limited stretch area can only fill a color, Irregular not applicable):Learning Links: http://www.ui.cn/detail/48906.html5, the general icon needs to compress, if PS design, need to export the Web format PNG best, mobile phone storage space is very valuable. In general, small icons hundreds of bytes to about 10KB.6, naming mode: General background image to bg_+[module or function in English], general icon Name: ic_+[module or function English], the rest of the naming method:

the socket stream.Second, create the client in Android with the following source code:Try {InetAddress serveraddr = inetaddress. Getbyname ("192.168.1.100");//tcp Server IP addressLog. D ("TCP", "Server: Connecting ...");Socket socket = new socket (serveraddr,51706);String message = "Hello!" Android. ";Try {Log. D ("TCP", "Server is sending information: '" +message+ "'");PrintWriter out = new printwriter (

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

> we name=name>ShirtWe> we name=price >68We> we name=Unit>ThingWe>bag>bag id=item suffix=2> we name=name>CokeWe> we name=price >2.20We> we name=Unit>BottleWe>bag>bag id=item suffix=3> we name=name>BookWe> we name=price >51.24We> we name=Unit>ThisWe>bag>cHTML>cHTML> for bags=Item End="@{item:getlength}"> item list= "@{item:getsuffix}" end="@{item:getlength}" nolast> - name>@{item:name}name> price value>@{item:price}price > unit>@{item:unit}

=Unit>BottleWe>bag>bag id=item suffix=3> we name=name>BookWe> we name=price >51.24We> we name=Unit>ThisWe>bag>cHTML>cHTML> for bags=Item End="@{item:getlength}"> item list= "@{item:getsuffix}" end="@{item:getlength}" Nokey> -- name>@{item:name}name> price value>@{item:price}price > unit>@{item:unit}Unit> Item>for >cHTML>Example file _samples/app/one_array_nokey.json in the _samples/

Create a new file with extension JSON, such as One.json ()Then enter the following content{"Item": {cHTML>bag id=item suffix=0> we name=name>PotatoesWe> we name=price >1.24We> we name=Unit>KGWe>bag>bag id=item suffix=1> we name=name>ShirtWe> we name=price >68We> we name=Unit>ThingWe>bag>bag id=item suffix=2> we name=name>CokeWe> we name=price >2.20We> we name=Unit>BottleWe>bag>bag id=item suffix=3> we name=name>BookWe> we name=price >51.24We> we name=Unit>This

All records in the output Bag are a json array with only values-proficient in android, IOS App application development, and jsonandroid Closed json format content No Initialize records in the Bag Same as Yibo (see the complete code section below) Adds the name values of all records in the Bag into a string. Only the array of the output value can be directly add

Today, will be "the first line of code," the final Combat Coolweather project, carefully done it again.Tonight, in the first phase of the book to develop code in the end of the Android studio, found that the Setonitemclicklistener function according to the book error, the original book as follows:However, error, Gradel hint that the class does not exist, it is unclear whether because the author version is too old reason, to be verified, later, I used

0 Fundamentals Android Development: Bluetooth chat room app second talk2.1 Course Content Application Scenarios2.2 Android UI Design2.3 Component layouts: LinearLayout and Relativelayout2.4 TextView, EditText, button controls2.5 hiding and displaying of text information2.6 Entering and displaying emoji imagesWatch Onli

the Intent. Verify The caller's package name , Action , and so on . 8. Add the appropriate self-defined permissions to the service. If you only have your own application, you can add exported = False (same as ContentProvider).9. Restrict access to activity. If you only have your own application, you can add exported = False.10. Make sure that debug mode is false before applying the announcement.One by one. for cross- application functionality , the application responds before validating t