active stylus android

Work needs, to do some understanding of thisGeneral handwriting to Android canvas a little understanding should know, only need to use DrawPath can draw on the view.The key to the stylus is to change the strokewidth of the path.This is very big, after all, Setpaint can only set a paint, once the paint parameters changed, the entire path will change.So we can only make a path.We can start by opening a ArrayL

The Android use task management activity is a collection of activities that are stored in the return stack (back stack);The system always shows the top of the stack activity to the user;Start new activity--new activity into the stackPress the back key or call finish () to stack top active outFour states of the active life cycle:1. Operating status: At the top of

will not show, print the URL to see, wipe, URL has a "%", escaped after the OK. Of course, other special characters need to be escaped on the basis of the need. "%" is just one example.Five pits: Some phone errors do not showA WebView method was called on thread ' Javabridge '. All WebView methods must is called on the same thread.This is because part of the phone WebView method must be on the same thread. by printing Thread.CurrentThread (), you know that you are not part of the same thread. H

://www.shuame.com/root/Re File Manager: http://shouji.baidu.com/software/22415959.htmlDownload two tools from the link above, one to get the root of the device (don't worry, it's not a brush, it's not a good idea to make the device brick.) And simple operation, one-click root), one is root after viewing, modify the device files.Step Two: RootAfter installing the root Wizard on the Android device (mobile phone, tablet), open it, the main interface has

There are four startup modes, Standard, Singletop, Singletask, and singleinstance, which can be specified in androidmanifest.xml by assigning Android:launchmode property to select the startup mode. In the actual project we should specify the appropriate startup mode for each activity according to the specific requirements. 1. StandardStandard is the active default startup mode, which is automatically used by all activities without explicit design

Android determines whether the program is active or running on the mobile phone. Shenyang binzi encountered such a problem in today's project requirements. In Service, it is necessary to determine whether the current program is active, in other words, services running in the background need to check whether the current program is a program of the service, so that

Android operating system for In addition, if the user wants to add an app shortcut to the device's home screen, you can press and hold the app's icon in launcher, and the Android system will automatically add a shortcut to the app on the home screen. The name and icon are the same as in launcher.In addition to supporting shortcuts to apps (main activity), Android

" + gettaskid ()); Modifies the code of the OnCreate () method in secondactivity, printing the ID of the current return stack. log.d ("secondactivity", "Task ID is" + gettaskid ()); The last modification of the OnCreate () method in thirdactivity still prints the ID of the current return stack in the OnCreate () method. log.d ("thirdactivity", "Task ID is" + gettaskid ());Printing results:As you can see, the secondactivity Task ID differs from firstactivity and thirda

});} @Overridepublic boolean oncreateoptionsmenu (Menu menua) {//TODO auto-generated Method Stubgetmenuinflater (). Inflate ( R.menu.main, MenUA)///menu will not be displayed by default, only by pressing the menu key, the menus will be displayed at the bottom. return true;} @Overridepublic boolean onoptionsitemselected (MenuItem Item) {//TODO auto-generated method Stubswitch (Item.getitemid ( ) {Case R.id.add_item:toast.maketext (this, "clicked Add", Toast.length_long). Show (); Break;case R.id.