3/18/2023 0 Comments Tonegenerator android wait exampleWe usually register a listener to receive and process events, Or create a custom view control to handle events. When the application of Window be in Active State and be able to receive input events ( For example, key events 、 Touch events, etc ) when, The events reported at the bottom of the system will be InputDispatcher Distribute to this application, The main thread of the application passes through InputChannel Read the input event and submit it to the interface view for processing, The interface view is a tree structure ,DecorView Is the root of the view tree, Events start from the root of the tree and move layer by layer to the endpoint ( For example, one Button) Pass on. Let's take a brief look at the generation of this ANR The whole process of. ġ、 The main thread responds to input events in 5 Not processed in secondsĪndroid The event system from 2.3 Started doing a completely different implementation, The original 2.2 It's in Java Layer, But in 2.3 The whole is transferred to C++ layer, This book is based on 2.3 Later versions will explain. Input event / Specific operations : An input event is a key 、 Touch screen and other devices input events, Specific operations refer to BroadcastReceiver and Service Functions in the life cycle of, produce ANR Different contexts, Lead to ANR The reasons will be different įor these three conditions, There are three conditions that trigger ANR, The details are as follows. Timeout time : produce ANR Different contexts, The timeout will also be different, But as long as there is no response within this time limit, it will ANR The main thread : Only the main thread response timeout of the application process will produce ANR If the input event is not processed, it will be generated ANR,Android A dialog box will be displayed, Prompt the user that the current application is not responding, Users can choose to wait or close the application ( That is, the process of killing the application ).ĪNR The generation of needs to meet three conditions at the same time : stay Android in ,ActivityManagerService( abbreviation AMS) and WindowManagerService( abbreviation WMS) Will monitor the response time of the application, If the application main thread ( namely UI Threads ) The input event has not been processed within the timeout, Or the specific operation is not completed, Will appear ANR. package com.ANR, yes “Application Not Responding” Abbreviation, namely “ The application is not responding ”. Important: Don't forget to include the call to System.loadLibrary // as shown at the bottom of this code sample. An application might, for example, do other things as a background task is running, and then later wait for the task to complete. Obviously, waiting for the async method to complete is the same as making a synchronous call, but an application wouldn't typically do this. This example will do an SFTP upload (over SSH) and will use the Async version of each method. (Android™) Wait for Async Method to Completeĭemonstrates using the Wait method to wait for an asynchronous method to complete.
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