As we all know, the Android resource file is an int type ID to save its reference, through the annotation type, we can write the code, the time to find the parameter type of error, avoid potential bugs, as follows:By @LayoutRes We specify that the parameter must be in R.LAYOUT.XXX format, and the IDE will prompt us for errorsIntroduction of annotation types into the project through GradleCompile ' com.android.support:support-annotations:23.1.1 '
Android development: Get all software information, android Development
Program running:
Program code:
/*** Obtain all software information ** 1. display All software in the system in asynchronous mode * 2. click Open specified software * 3. local SharedPreferences * @ author jph * Date: 2014.09.21 */public class ScanPackage1 extends Activity {/** scan successf
GET for Android Http client Programming
Speaking of Http programming, I don't have to remember the GET and POST request methods. This article lists the common Http programming methods in Android with simple steps and instructions, for the reference and guidance of those who have just started on the
Whether it is PC-side software or Android software, sometimes when sold without outright buyout or purchase of copyright, then you need a set of selling, and to ensure that the software is forbidden to copy.The software on the PC side can be added to the code to detect the hard drive serial number. In this case, it is not possible to copy to another computer because the hard drive serial number is identified incorrectly. Then in
Android get contacts and android contacts
In getting started with Android, record the problems encountered in learning and some personal summaries.The contact database path is/data/com. android. providers. contacts/database/contacts2.db.Permission issues:
Android -- get application version name and version number, Android -- version number
Use Package Manager
Package com. liunan. myfirstapp. util; import android. content. context; import android. content. pm. applicationInfo; import andro
[Practical] How To Get The Android Status Bar and the android Status Bar
private static int getStatusHeight(Context context){ int statusHeight = 0; Rect localRect = new Rect(); ((Activity) context).getWindow().getDecorView().getWindowVisibleDisplayFrame(localRect); statusHeight = localRect.top; if (0 == statusHeight){
How to get android mobile phone contacts and display them by letter (3): android contacts
If you get the contact Profile and display it:
How to obtain bitmap Based on photoId:
public static Bitmap getContactPhoto(Context context, long photoId, BitmapFactory.Options options) { if (photoId
Add the following t
parameter is IPACKAGESTATSOBSERVER type ObserverSo GetMethod () need to fill in the parameters:The first parameter is the method name: "Getpackagesizeinfo"The second parameter is the first parameter of Getpackagesizeinfo (): String.classThe third parameter is the second parameter of Getpackagesizeinfo (): Int.classThe fourth parameter is the third parameter of Getpackagesizeinfo (): Ipackagestatsobserver.classThis method can be obtained through reflection, and then the method is used, as follow
returns null after sliding for a distance, that is, after the first child is recycle, it always returns NULL.this = Layoutmanager.findviewbyposition (0); 4. If LayoutManager is using Linearlayoutmanager, the following method is strongly recommended to get the sliding distance: Public int getscollydistance () { this. Getlayoutmanager (); int position = layoutmanager.findfirstvisibleitemposition (); = layoutmanager.findviewbypo
Tag: Code cat code Log Direct err map load ATIThere are many ways to get the package name and version number for other apps on your Android phone, which can be obtained directly from the APK package via AAPT or via code on your phone. Obviously, for the product or user to obtain this information, on the phone to obtain more convenient.Let's look at how to get the
packaged APK file) Common error: Apktool The following information is often present during anti-compilation1.Input file is not found or is not readable.2.Destination directory (C:\Users\user\a) already exists. Use-f switch if you want to overwrite it.3.Exception in thread "main" Brut.androlib.AndrolibException:Could not decode ARS C fil .....Solution:1 and 2 is because the Apktool upgrade to more than 2.0, the use of the way has been replaced by: Apktool D [-S]-f-o, parameter specific meaning c
need to get the width of the control of the method?Method One: More than the other two methods more than one calculation, that is, multiple calls to the Onmeasure () method, although the method looks simple, but if the target control calculation time is relatively large (such as ListView, etc.), is not recommended to use.Method Two, its callback method will be called many times, and sliding textview when the time is called, so it is not recommended.M
When I first started using Android studio, when creating a javabean, I used to right-click on the JavaBean class to find the option to generate Get,set. But unfortunately, I can't find it.That way. How to quickly set,get or generate constructors to generate the ToString method.There are two ways of doing this:Way One: code-->generateMode two: Through the shortcut
Using EXLIPCE to send, we can add the version number to the configuration file, using as development, you can add the version number to Build.gradle, if we want to get the version number inside the project, we can use the following methods to obtain:Gets the version number of the current app:PackageInfo pkg = Getpackagemanager (). Getpackageinfo (Getapplication (). Getpackagename (), 0);= Pkg.versionname; // the current version numberGet the version n
Recently Tinker Android, encountered a problem, because there is no root permissions, need to call intent install APK, but need to get the user installed (for example, the user clicked back or cancel), checked a lot of articles, finally can be resolved, but flawed, the solution is as follows: Public Static voidInstallPackage (Context context, file file,intRequestcode) { //Log the pre-installed APK file n
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