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Android Developers
Android Studio
Preview
Release Updates
Emulator 27.2.3 Canary
2018年3月30日星期五
Emulator 27.2.3 is now available in the Canary channel. It contains the following changes:
Added a shortcut to go to the Screen Recording UI: Control + Shift + R (Command + Shift + R on Mac).
Changed the
-phone-number-prefix
command line option to
-phone-number
<number>
, allowing setting of the full phone number.
Screenshots can now be taken from the telnet console with either of these commands:
screenrecord screenshot
<destination-directory>
adb emu screenrecord screenshot
<destination-directory>
Screenshots are in PNG format.
Fixed a crash on start.
The frameless emulator's resize rectangle has been updated to better follow the emulator's visual theme.
Performance and antivirus software
We have been conducting tests to determine how to improve loading and saving times for AVD snapshots. In performing these tests, we have found that antivirus software packages that monitor every read and write operation can decrease performance for loads and saves. If your antivirus software provides the ability to whitelist applications, try whitelisting the Android Emulator application and see if performance improves. Also, if you have additional antivirus software installed beyond that which is included with your operating system, run some tests yourself to determine which gives you better performance with applications like Android Emulator.
Android Studio 3.2 Canary 8 now available
2018年3月26日星期一
Android Studio 3.2 Canary 8 is now available in the Canary and Dev channels.
Inspect JNI References in the Memory Profiler:
If you deploy your app to a device running Android 8.0 (API level 26) or higher, you can inspect memory allocations for your app’s JNI code using the
Memory Profiler
. While your app is running, select a portion of the timeline that you want to inspect and select JNI heap from the drop-down above the class list, as shown below. You can then inspect objects in the heap as you normally would and double-click objects in the Allocation Call Stack tab to see where the JNI references are allocated and released in your code.
General bug fixes:
This update includes fixes for the following public issues:
Issue#72614343:
Gradle build fails to recover from invalid cached library
If you already have an Android Studio build on the
Canary or Dev channel
, you can get the update by clicking Help > Check for Update (or Android Studio > Check for Updates on Mac). Otherwise, you can
download here
.
Emulator 27.2.2 canary
2018年3月23日星期五
Emulator 27.2.2 is now available in the Canary channel. It contains the following changes:
Fixed hang on startup if the QEMU main loop takes too long to start, which can happen under high resource usage / network latency conditions.
Fixed an intermittent crash on startup if -no-audio is specified on the command line.
ConstraintLayout 1.1.0 beta 6
2018年3月22日星期四
We just published ConstraintLayout 1.1.0 beta 6. This is the final RC before 1.1.0 stable. It’s available from the google maven repository:
dependencies {
compile 'com.android.support.constraint:constraint-layout:1.1.0-beta6'
}
Documentation is available on
https://developer.android.com/reference/android/support/constraint/ConstraintLayout.html
Changes:
Improved optimizer performances and exposed it (see documentation)
Additional experimental performance work with Chains (turned off by default)
Fixed several issues with margins support in Chains
Centering larger chains on smaller endpoints now works
Fix barrier issues (wrap_content behavior)
ConstraintSet issues with RTL fixed
Android Studio 3.2 Canary 7 now available
2018年3月19日星期一
Android Studio 3.2 Canary 7 is now available in the Canary and Dev channels.
Smart editor features for CMake build files:
If you use CMake to
add C and C++ code to your project,
Android Studio now includes smart editor features while you edit your CMake build scripts, such as:
Syntax highlighting and code-completion: The IDE now highlights and suggests code completion for common CMake commands. Additionally, you can navigate to a file by clicking it while pressing the Control key (or Command on MacOS).
You can now use
IntelliJ’s code reformat
option to apply code styles to your CMake build scripts.
Safe file renaming and deletion: The IDE’s built-in refactoring tools now also check if you are renaming or deleting files that you reference in your CMake build scripts.
General bug fixes:
This update includes fixes for the following public issues:
Issue#73335428
: Relative path for ANDROID_HOME breaks the build
Issue#37104761:
Enforce check that targetSdkVersion is not less than minSdkVersion
Issue#37095605:
AS/Lint should check for non-localized version of drawable resource
Issue#73981396:
Request: add warning when using Locale.getDefault() inside static-final variable
Issue#74128292:
Kotlin import flagged for InlinedApi despite constant used correctly
Issue#74225292:
Unit test configuration by context for entire directory in Kotlin is creating duplicate
Issue#64727495:
Use dependency on the latest Espresso library.
Issue#37119265:
Do not use deprecated version of LargeTest
Issue#70578119:
C++ compiler incorrectly reporting STL type errors
If you already have an Android Studio build on the
Canary or Dev channel
, you can get the update by clicking Help > Check for Update (or Android Studio > Check for Updates on Mac). Otherwise, you can
download here
.
Android Studio 3.1 RC 3 now available
2018年3月19日星期一
Android Studio 3.1 RC3 is now available in the Beta channel.
This update includes fixes for the following public issues:
Issue#73800636
: Main dex list not tracing all classes annotated with runtime annotations
Issue#70909581
: okhttp fails sporadically on android 4.x mediatek devices
Issue#73122455
: External CMake building broken by using Gradle plugin newer than 3.0.1
If you already have an Android Studio build on the
Canary or Dev channel
, you can get the update by clicking Help > Check for Update (or Android Studio > Check for Updates on Mac). Otherwise, you can
download here
.
Emulator 27.2.1 canary
2018年3月16日星期五
Emulator 27.2.1 is now available in the Canary channel for Windows, Mac, and Linux,
bringing the fixes and enhancements from 27.2.0 to Windows
.
Emulator hang fix
We addressed a major source of emulator hangs on Windows by fixing an issue in QEMU 2.9. If you are still experiencing emulator hangs, please file an issue to
Issuetracker
. We are actively investigating emulator hangs and are making this a priority.
Screen recording enhancement
Audio encoding for screen recording has been moved off of the QEMU main loop to a separate thread to increase reliability and performance.
Other changes:
Fixed a crash on saving recorded video from screen recording.
Fixed an issue in which the VirtualScene camera's controls could steal focus too frequently on Xfce, and the mouse pointer could flicker.
Telephone and SMS are now properly deactivated when airplane mode is on.
Mac: Emulator window now properly shows a drop shadow when frameless mode is disabled.
To address issues caused by not having enough free disk space for snapshots, the emulator now checks for sufficient free disk space on startup, and will not start unless at least 2 GB is free.
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