apps for android tablets

Backwards compatibility is poor in Android, but an app app can be processed or run between versions. Backward compatibility is not good, different versions of the system its API version is different, naturally some interfaces are different, the new platform can not use the old API, the old platform can not use the new API.For the app to be more compatible, we can use the high version of the SDK to develop the application, and in the program runtime (r

Android apps are two dialing Methods: androidapp What should I do if I want to add a dialing function to the APP? Android provides two methods: The ACTION_CALL method and the ACTION_DIAL method to open the dialing interface of the system. Here is a small example. First, you need to add a permission in AndroidManifest. xml, which is easy to forget. Next, we will

, KeyEvent event) { if(KeyCode = =keyevent.keycode_back)) {System.out.println ("Press back Key OnKeyDown ()"); return false; }Else { return Super. OnKeyDown (KeyCode, event); }} @Overrideprotected voidOnDestroy () {Super. OnDestroy (); System.out.println ("Execute OnDestroy ()"); } }Main.xml as follows:relativelayout xmlns:android= "http://schemas.android.com/apk/res/android" xmlns:tools = "Http://schemas.android.com

From: http://www.poemcode.net/2012/06/interpreting_log_message/ This blog post is for GoogleI/O 2011: One of the notes made by the memory management for Android app, mainly used to deliver the speaker PatrickDubroy's point of view is a small part of his understanding. The opinion here may contain errors or outdated information. Therefore, it is recommended that you directly watch the original video or presentation if your English skills are acceptable

, the code is as follows @Override publiconBind(Intent intent) { // TODO Auto-generated method stub returnnew IMyService.Stub() { @Override publicvoidbasicTypethrows RemoteException { // TODO Auto-generated method stub } }; }At this point, a simple aidl is created successfully.We go back to the SERVICE2 project and add the button event listener, case R.id.button3: bindService(serviceIntent, this, Con

; Resources> Then the face manifest.xml in the reference, this method is slightly more troublesome. android:icon= "@drawable/icon" android:label= "@string/app _name " android:theme=" @style/notitle "> In fact, it can be seen that the second method is essentially the same as the third method, But the second method calls the system-defined Style.xml file, and the third method is to define the Style.xml in its own application, and then call it by itself, in fa

My working environment: Ubuntu 16.04 LTS + Android Studio 2.3After the AVD is started, run the app with an error message:Delete_failed_internal_errorError while installing APKsThe search found that this was caused by not shutting down the instant app on Android Studio.File->settings->buil,execution,deployment->instant run->disable it.For details, please refer to the following StackOverflow link:https://stac

Some apps for Actionbar in AndroidSet up titles, icons, and custom labelsActionBar bar = Getactionbar ();HideBar.hide ();ShowBar.show ();Icon HideBar.setdisplayshowhomeenabled (FALSE);setting of IconsBar.setdisplayuselogoenabled (TRUE);hiding the titleBar.setdisplayshowtitleenabled (FALSE);Set sub-headingsBar.setsubtitle ("Neon");Switch to return buttonBar.setdisplayhomeasupenabled (TRUE);Custom ButtonsBar.setdisplayshowcustomenabled (TRUE);Set MenuBu

The Android 5 was officially released yesterday, and the Android developer site was updated, adding an Android app guide that created material design style, and also updated the support Library in support The library adds some material design-style controls and animations, and here's a quick introduction to how to develop material design-style

interfaces, monitors, input devices and so on. After executing these kernel programs, you start executing the application.3, the first application is the home program. is launcher, used to manage a variety of apps. Launcher provides a portal to launch other applications.The Linux architecture used by Android:1, the processor reset completed, the implementation of read-only ROM area of the program, this pro

market turmoil in Android apps, the level of developers is uneven. So now the vulnerabilities of Android applications, malware, fishing and so on are still increasing. plus root for App sandbox damage, Android upgrade restrictions. The domestic Android environment is chaot

In android, HttpURLConnection and HttpClient implement data interaction between apps and PCs. androidhttpurl I have been studying android for a few days, but I am very satisfied. I feel very happy when I learn a little bit of knowledge. I think today is especially meaningful. Maybe this is an inexplicable love. Next, let's talk about the differences between HttpU

Android API Guides web app ------------ Building Web Apps in WebView (WebView and page binding) If you want to implement a web app on your mobile phone or load a web page in the app, you need to use the WebView control. This WebView class is an extension subclass of the View class. It allows web pages to be displayed as part of the application layout. It does not have the features of a complete browser, suc

Guo JiaEmail: [Email protected]Blog: http://blog.csdn.net/allenwellsGithub:https://github.com/allenwells"Media Apps: Android platform Vitamio player Discovery Trail Series" Chapter Index"Media Apps: Android platform Vitamio player Discovery Road Series": Vitamio openingA brief introduction to VitamioFor the development

Mainactivity:packagecom.testnbackpressed;import android.os.Bundle;import android.view.KeyEvent;import android.app.Activity;/*** Demo描述:* 处理Back键按下事件** 注意事项:* 以下两种方法勿一起使用*/public class MainActivityextends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);}/*** 监听Back键按下事件,方法1:* 注意:* super.onBackPressed()会自动调用finish()方法,关闭* 当前Activity.* 若要屏蔽Back键盘,注释该行代码即可*/@Overridepublic void onBackPressed() {super.onBackPresse

most are translated by Google's official documents. Because of the time problem, coupled with their own English is bad enough, the recent slow. However, such a down, plus some of their own code exercises, for the material design can be basically used. Unfortunately, most of the style is not backward compatible, had to wait 5. There are some big God in the Internet has been open source some open source components, we can take this curve to salvation, the next time in a special collation. This ar

Android applications consist of loosely coupled components and are bound together using application manifest, and the application manifest describes how each component interacts with each other, and is used to develop application metadata, its hardware and platform requirements, External libraries and the required permissions. The following components provide the basic mechanism module for the application: activity: The presentation layer of the

. You can crop the outline of a view using a View.setClipToOutLine() method, or a android:clipToOutline property. Only rectangles, rounded rectangles, and circle outlines are clipped, and you can use Outline.canClip() methods to detect whether the support is clipped. Crop the view to a drawable shape, set drawable as the background of the view (let the view appear on it), and call the View.setClipToOutline() method. Cropping a view is an expensive operation and does not use shape animation when

Use the following code in Android to sharedpreferences data sharing between two applications, but only if you want to ensure that the android:shareduserid of the two applications is the sameContext context = NULL; try {context=createpackagecontext ("com.android.providers.downloads", context.context_ignore_security);} catch ( Namenotfoundexception e) {//TODO auto-generated catch Blocke.printstacktrace ();} Sharedpreferences mprefs = context.getsharedpr

Create a custom layout (Creating custom Layouts) This article describes how to create a custom notification and use the wearable UI library to create a custom layoutYou also need to knowWearable Design Guidelines(Wear Design Principles)In addition to screen size and instantaneous read capability (Glance ability), creating a layout for wearable apps is roughly the same as a regular phone.Create a custom notification (named notifications)Typically, you