For those who are unable to use Android smartphones for their eyesight, hearing or other physical reasons, Android offers accessibility features and services to help these users operate devices more simply, including text-to-speech, haptic feedback, gesture manipulation, Trackball and handle operation. Developers can build their own accessibility services, which can enhance usability, such as sound cues, ph
redraw is notAll item, but the item! that the view state has changed So we directly Notifydatasetchange () methodCan, of course, know one more of the above method is nothing ~
Code Download:Listviewdemo3.zipThis section summarizes:
OK, this section tells you about the implementation of the data update in the ListView, of course, not only the ListView, but the other adapterClass controls can call these methods to complete data updates ~ That's all there is to it ~ Thank you
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Problem:1. Write Java code, but want to use eclipse, but Eclipse is downloaded Android version, so there is no JDT plugin, so need to install a JDT.2. Because the landlord is using the Mac so the system comes with java1.6, but the landlord also to use the Android studio to develop Android 5.0 to jdk1.7, so they upgraded to java1.7.3.
I set MEDIACODEC profile, has not been successful, read the source after the problem is found: https://android.googlesource.com/platform/frameworks/av/+/437ced8a14944bf5450df50c5e7e7a6dfe20ea40/media/ Libstagefright/acodec.cpp After you set up profile, you also set a Level property, but the current SDK does not provide this Key. Even if you manually set the level, like this: Mediacodec codec = Createencoderbytype (MEDIAFORMAT.MIMETYPE_VIDEO_AVC); Mediaformat format = = Mediaformat.createvideof
Method from: http://stackoverflow.com/questions/42612468/ How-can-i-get-more-information-about-waiting-for-target-device-to-come-onlineReason: Android studio download Linux emulator, version 26.1, the library file is not compatible with the system, there may be compatibility issues on the versionFiles are located in Androoid sdk/emulator/lib64/libstdc++Should originate from the SDK's own version of the libr
catalogs.drawable-sw600dp-ldpidrawable-sw600dp-mdpidrawable-sw600dp-hdpidrawable-sw600dp-xhdpidrawable-sw600dp-xxhdpiSimilar to. In general there are drawble-ldpi, drawable-hdpi and other directories are sufficient, do not need to add all the circumstances.6, avoid using bitmaps, such as: Jpg,png (if you want to use the best optimization, Pngcrush or imageoption)7. Drawing with XML8, multi-use 9 figure9. Minimize the level of XML layout.10, with Android
Recently has been looking at the Android source code related documents, including compiling the source, as well as the framework layer, I am very lazy, has not written blog, today I would like to compile a source code, and run in the simulator.Different versions of the source code, the required JDK may also be different, all reference to the official documents, download the source code method also refer to the official documents.Note: 1. Environment v
Methods and issues for integrating third-party libraries in AndroidStatement:1. This article refers to the online students of the existing results, here to express appreciation, reference materials in the post have links.2. This article focuses on the third part, is in the development of problems and solutions. First, the second part is a reference to the results of the online students to be collated.3. Welcome reprint, Exchange, please respect the
About coding issues. First of all, eclipse generally our files are set to utf-8by default. For migrating to Android studio displays no garbled issues. Some of you may encounter a problem: Chinese in the code (including Chinese in the comments), jumping out of error:gradle at compile time: Warning: Non-mapped characters encoded EUC_CN. Then the project code AH, id
adjust the keyboardSometimes it is found that the keyboard cannot be adjusted with the following code:Inputmethodmanager IMM = (Inputmethodmanager) getactivity (). Getsystemservice (Context.input_method_service); Imm.showsoftinput (MView, 0);It is possible that the focus has fallen on the other non-edit frame view, and a delay may be good. When the Input method pops up, it detects if the current focus view is valid, and if the non-active focus view is not available, the input method is not ejec
Such arrows are implemented with CSS-3 and the entire code is as follows:DOCTYPE HTML>HTMLLang= "en">Head> MetaCharSet= "UTF-8"> Metaname= "Viewport"content= "Width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=0"/> title>Documenttitle> styletype= "Text/css">. U-scrollload-tips{Color:#767676;text-align:Center;Height:40px;Line-height:40px;text-decoration:None;Display:Block;background:#f4f4f4;}. U-scrollload-tips I{Display:Inline-block;position:relative;vertical-align:
soft keyboard."Adjustpan" The Activity main window does not adjust the size of the screen to allow space for the soft keyboard. Instead, the contents of the current window are automatically moved so that the current focus is never covered by the keyboard and the user can always see the part of the input. This is usually not expected than resizing, because the user may turn off the soft keyboard in order to get an interactive operation with the covered content.BugIn full-screen state, the adjust
files is implemented.Another way to implement conditional compilation is to compile the platform-related code into a static Java library,method is to useInclude $ (build_static_java_library) instead of include $ (build_java_library)The include $ (build_java_library) will compile the jar package directly. The include $ (build_static_java_library) also generates a JAR package,However, when compiled by other apk, if the library is included through Local_static_java_libraries, it will also compile
I now have 2 Android threads, one is the view thread, one is the worker thread, and I now want the project thread to pause until the view thread's OnDraw method is called before continuing to runHow to do? How to wait for a signalProcessing methodsTo pass an object in a java2 thread, let one thread notify the other thread as follows, calling in the worker threadStick.wait ();When the view thread finishes its onDraw work, it calls this:You can call Sti
APPCOMPAT_V7 class Package Issues when Android creates a projectRecently found in Android development, after the update ADT to 22.6.0, create a new installation project, there will be a Appcompat_v7 Reference library package, this is what is going on? The original appcompat_v7 is Google's own one of the compatibility package, is a support library, can make more
focus."The TextView of the head here is actually not on top, as the individual thinks not. Because when I set the focus two property of the head to False, I was able to click.(PS: The default android:focusable= "false " android:focusableintouchmode= "false" these two properties are false).My judgment here is: When you configure the focusable attribute for view, the same time is also setonclicklistener, assuming that the other edittext get the focus, Then when you click on a view that can be foc
Beginning in Android 6.0 (API level), users grant permissions to apps while the app is running, not when they install T He app. This approach streamlines the app install process, since the user does not need to grant permissions when they install or Update the app. It also gives the user more control over the app ' s functionality; For example, a user could choose-give a camera app access to the camera and not the device location. The user can revoke
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