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We all know that the height of the control obtained in onCreate () is 0. Why? Let's take a look at the example:First, we can write a control, which is very simple:[Java]Public class MyImageView extends ImageView {Public MyImageView (Context context, AttributeSet attrs ){Super (context, attrs );}Public MyImageView (Context context ){Super (context );}@ OverrideProtected void onMeasure (int widthMeasureSpec, int heightMeasureSpec ){Super. onMeasure (widthMeasureSpec, heightMeasureSpec );System. ou
Android Http Client Programming getSpeaking of HTTP programming, do not remember the GET and post two request methods, this article with simple and clear steps and instructions, the use of Android in the common HTTP programming methods, to the first on the Android road to start the reference and guidance of the struggl
above describes the wood has found assets and res These two folders, the two folders are storage resources, then they have what difference ?First: Assets stored resources will not generate IDs in R.java, and any resources under the Res folder will generate IDs in R.java;Second: The resources stored by assets need to be accessed through the Open/openfile method (which is better for storing large files), whereas the resources in RES are generally accessed through r.id.** or r.layout.***.
prompt Output window.7.10. Terminal Tools window: TerminalTerminal commands can be executed directly in the Terminal tool window, which is very convenient to use.7.11. Event Log window:The Event Log window.7.12. Gradle terminal window: Gradle ConsoleGradle Information Output window.7.13. Android Module Quick window: Android modelThe model window included in the Android
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 '
Recently, I've been trying to get native MAC addresses from the NDK with C + + on Android, but with the IOCTL (SIOCGIFHWADDR), the return value is less than 0, which means that the interface information is not available. At first I thought it was my own missing access rights, so I have been increasing uses-permission, and later found that no matter how this is the case, found that the original
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
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
[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){
Lead:Today's Android apps are mostly combined to take pictures and choose from albums (of course, this is the product dog thing, the beginning of the topic). )Today in the writing of a functional module encountered an embarrassing problem, the same is the photo to get the image function, on the colleague's Samsung run no problem, but on my mobile phone on a run on the system-level modification of the
In the previous article talking about Service Manager as the path of Binder daemon of the Android interprocess communication (IPC) mechanism, this paper introduces how Service Manager becomes the daemon of binder mechanism. As a daemon, Service Manager's job is, of course, to serve the server and the client. So how does server and client get a Service Manager interface to enjoy the services it provides? Thi
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
1: Get Packagemanager Get all statically installed apps:?
1
PackageManager pm = getPackageManager(); 0);
2: Get Activitymanager Get dynamic all running processes?
12
ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);List" ; "+ info.uid
This article illustrates how Android effectively gets the status bar (StatusBar) height. Share to everyone for your reference, specific as follows:
Encountered a problem needing to get the status bar height.
Like the late version of Android, you can't just quit. A number of methods were found to get the status bar he
One. Get the screen height:(1).WindowManager wm = (WindowManager) getsystemservice (context.window_service); int width = Wm.getdefaultdisplay (). GetWidth (); int height = Wm.getdefaultdisplay (). GetHeight ();(2).WindowManager wm = This.getwindowmanager (); int width = Wm.getdefaultdisplay (). getwidth (); int height = Wm.getdefaultdisplay (). GetHeight ();Two. Get the coordinates of the control:int[] loca
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