how to restart system ui in android

MessageQueue, and then looper out, sent to handler call display, sub-threading because there is no looper, So we need to add looper.prepare and Looper.loop to create a looper, but in essence, this is still called on the child thread, so it will be an error!So why does Android require the view to be changed only in the main thread of the UI? This is about Android's single-threaded model, because the resulti

Android, for time-consuming operations to be placed in sub-threads, otherwise it will rest their lives anr, this time we will learn how the Android multi-threaded update UI.First, let's Meet the ANR:　　ANR: Application not reponse: application unresponsive　　main thread: UI thread　　the cause of the ANR : The main thread needs to do a lot of important things, respon

Android learning route (4) Build a simple UI The Android Application's graphical user interface is constructed usingViewAndViewGroupHierarchical nesting of objects.ViewObjects are usually UI parts, such as buttons or text fields, andViewGroupIt is a container used to define how its sub-layout is arranged. It is usually

System density: density Density value resolution proportions DP and PX ldpi 120 240x320 3 1DP = 0.75px mdpi 160 320x480 4 1DP = 1px hdpi 240 480x800 6 1DP = 1.5px xhdpi 320 720x1280 8 1DP = 2px xxhdpi 480 1080x1920 12 1DP = 3px

,.gif) or a status list (state lists), animation (Animation drawables), Graphics (shapes), and so on.Equivalent to a picture resource in a Web page. Where-xxx is used to fit the screen with different pixel densities　　LayoutThe directory's XML file is used to describe an interface structure for an Android UI interface (Activity) or a System Desktop component (Appw

Android UI Component Advanced (1)--button with progress barIntroduction to this section:This series is the advanced series following the Android UI component instance, in which we will further learnAndroid UI components, it is recommended to read this series of front-line le

Android sub-thread UI Update Summary Package com. jrhcode. morethreadtest; import java. util. concurrent. executors; import android. OS. asyncTask; import android. OS. bundle; import android. OS. handler; import android. app. acti

Android UI development 43rd-use Property Animation to implement moji weather 3.0 guide interface and Animation, androidproperty Previously I wrote moji weather 3.0 guide interface and Animation implementation, which perfectly achieves the Animation effect. That article uses View Animation, and this article uses the Property Animation implementation. Property Animation is an Animation library added after And

Android learning route (20) using Fragment to build a dynamic UI and androidfragment To create a dynamic or multi-panel user interface on the Android system, you need to encapsulate the UI components and activity behavior into modules, it allows you to flexibly switch betwee

Introduction :Handlerthread inherits thread, when the thread is turned on, that is, when it runs, the thread creates a looper that contains the message queue and provides its own get method for this Looper object. This is the only difference between it and the normal thread.Benefits :Why to use Handlerthread1, if the development of multiple uses like new Thread () {}.start (); In this way, a child thread is created, creating multiple anonymous threads, which makes the program run more and more s

settings interface can only contain settings, such as about, feedback and other interfaces, the entrance should be placed elsewhere.Set items are grouped by using the banner divider line. 7 items below do not need to be grouped. If an item is a separate group, consider placing it on top (important) or in the "Other" column at the bottom (not important). Try merging when you set more items, such as merging two related tick options into one multi-option. The sub-interface is used for a very long

import it as a libary into your project1. After the download is complete, import this project into the Eclipse development environment2. After importing the project, then create a new Android project and import the slidingmenu_library into the new Android project with the following steps:Note: Here's a place to pay special attention, after the new Android projec

The following are simple:Now use the fragment to implement a simple dynamic UI, click the title of the left title bar, and then the left body bar to display the corresponding article1. Add two fragment in the Activity_main.xml layout.One corresponding to the left of the title bar, a corresponding to the right of the body barlinearlayout xmlns:android="Http://schemas.android.com/apk/res/android" Android:id=

content based on conditions. The following factors can be used to resize and load content: L when users delete them from the home screen L when users stretch their sizes L changes in available space on the home screen You can provide separate horizontal and vertical la s for widgets. When the screen direction changes, the system will adjust the widgets as appropriate. The type of the widget determines its interface details, which need to be paid atte

) { mHeadlineSelectedListener.onHeadlineSelected(position); } } ...}Handling Screen configuration changesIf you use a separate activity to implement a separate part of the UI, remember to respond to certain configuration changes, such as screen rotation, to maintain UI consistency.For example, a 7-inch tablet that runs an Android 3.0

UI Effects in AndroidAndroid Classic Open source code shareThe original URL of this article Author of 23code, Welcome to submit to author Other UI-related URLs: Https://github.com/Trinea/android-open-project http://alamkanak.github.io/android-libraries-and-resources/ 23code.comSwi

, if there are also rewriting, it may take some time. I don't want to do this. I guess you don't want to do it either. I found a message online and did not have any related article. Finally, I pushed all the questions to the image. That is to say, since it is not correct, I will align according to the current alignment, and show the user only the UI, the UI just draws the image. So I don't need code to sol

(); } }); rightbtn.setonclicklistener (NewOnClickListener () { @Override publicvoidonclick (Viewv) { listener.rightclick (); } }); The method is written, and we call it in Mainactivity: publicclassmainactivityextendsactivity{private mytoolbartoolbar; @Override protectedvoidoncreate (bundle savedinstancestate) {super.oncreate (savedInstanceState); setcontentview (R.layout.activity_main); getactionbar (). Hide (); this.toolBar= (Mytoolbar) this.findviewbyid ( R.id.mytoolbar); toolbar.s

UI (View) refresh in Android There are many ways to update the view in Android, so you need to distinguish between different application scenarios. I think the most important thing is to clarify the usage of multithreading and double buffering. 1. multithreading and double buffering are not used. This is the simplest case. Generally, you only want to re-paint t

(Jenkins) Build an android project continuous integration and NativeDriver-based UI automated testing environment on the hudson Platform From kevinkong 02:56:51 | category: automated test | font size subscription After the deployment, running the build will first start the android simulator, then build the source code to generate the apk file, then install the ap