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Asynchronous Message Processing Mechanism-Handler principle in Android (continued)
The Asynchronous Message Processing thread refers to the infinite loop that the thread enters after it starts. Each cycle is performed once, a message is taken from the internal message queue
Android Handler logoff and MessageQueue message mechanism Principle
Android message processing class:
Logoff, Handler, MessageQueue, Message, ThreadLocal, ThreadLocal. Values, and HandlerThread.Logoff: the thread does not have a message
The code to send the message is as follows:Get Notification ManagerNotificationmanager Mnotificationmanager = (notificationmanager) getsystemservice (Context.notification_service);int icon = Android. R.drawable.stat_notify_chat;Long when = System.currenttimemillis ();Create a new notification that specifies its icon and captionNotification Notification = new Noti
getting messages from message queuesif (msg! = null) {if (msg.target = = null) {Return}msg.target.dispatchMessage (msg);msg.recycle ();}}From here we can see constantly getting the message from the message queue and then going through the message with the information carried in the target, looking for the correct hand
, the progress bar goes 5. If the acsag stops, the progress bar returns to zero.
Android XML:
Style = "? Android: ATTR/progressbarstylehorizontal"Android: layout_width = "fill_parent"Android: layout_height = "wrap_content"/>
Example 1: When the thread is enabled, message
= R.string.crash_dialog_title, // optional. default is your application nameresDialogCommentPrompt = R.string.crash_dialog_comment_prompt, // optional. when defined, adds a user text field input with this text resource as a labelresDialogOkToast = R.string.crash_dialog_ok_toast // optional. displays a Toast message when the user accepts to send a report.)public class TestApplication extends Application{@Ov
Text message sent by Android listeningRun: prerequisites:
To listen for changes to the data of the specified ContentProvider, you must register the CotentObserver listener with the specified Uri through ContentResolver. ContentResolver provides the following methods:Register the listener:
Publicfinal void registerContentObserver (Uriuri, boolean policyfordescendents, ContentObserver observer)
Parameter: uri
content field, and then deserialized into a different message object when it is read from the database.3> need to know, the current voice message is sent through the socket, so directly stored, the image is sent a URL, in the page display, then to request the address.6.2.3 Logical description of message sending1> Building a
Main Structure of sms:_ Id => short message number, for example, 100Thread_id => the dialog number, for example, 100Address => sender address, mobile phone number. For example, + 8613811810000Person => sender. A number is returned, which is the serial number in the contact list. The stranger is null.Date => long type. For example, 1256539465022Protocol => protocol 0 SMS_RPOTO, 1 MMS_PROTORead => whether to read 0 unread, 1 readStatus => status-1 recei
PreviousArticleThe following is a brief introduction to the android messaging machine:
1. Create handler in a thread with a message loop;
2. Create a message in another thread, bind it to handler, and send the message through handler;
3. process messages in the handlem
Android message prompt: AlertDialog, Toast, and Notification usage, androidalertdialog
This article mainly introduces the components that Android uses frequently for message prompts: ALertDialog, Toast, and Notification, as well as their basic usage, discusses some advanced topics, and summarizes some common proble
In the second article, "How touse handler to implement message distribution mechanism in Android (i)", we talked about the main thread of the Looper is the Android system in the launch of the app, it has helped us to create a good, And if you need to use handler in a child thread, we need to explicitly call Looper's prepare method and the loop method to create it
Android WebKit Message Processing
Preface
In Android APIs, WebView is used to provide developers with WebKit interfaces and features. WebView is actually an encapsulation and extension of WebKit. In android4.4, WebKit has been replaced with Chromium (the WebView/Chromium of android4.4 will be explained in detail in subsequent blogs ).
Establishment of WebKit
you want to use in the push notification service of apple, for example, the following code indicates that two types of notifications, tag and sound, are registered simultaneously:
-(Void) applicationDidFinishLaunching :( UIApplication *) app {
// Other setup tasks here ....
[[UIApplication sharedApplication] registerForRemoteNotificationTypes :( UIRemoteNotificationTypeBadge | uiremotenotiftypetypesound)];
How to use various notifications
Apps that use local notifications can use banners, remin
1, if the button in the Mainactivity.java click on the settings:
Send data method Simple TypeI.putextra ("txt", "Yes, I just came from the message!");Send data Method 2--Complex TypeBundle data = new bundle ();Data.putstring ("txt", "amount, I am a complex type of data method sent to!") ");I.putextras (data);
When the return value is included, start
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