有没有办法通过adb获取当前活动的布局和视图？

Question

出于环境原因，我只能使用adb命令。有没有一种方法来获得当前的布局属性，如id，position，text等？与uiautomatorviewer显示的相似。

Answer 1

使用adb shell uiautomator dump命令：

Usage: uiautomator <subcommand> [options]

Available subcommands:

help: displays help message

runtest: executes UI automation tests

    runtest <class spec> [options]

    <class spec>: <JARS> < -c <CLASSES> | -e class <CLASSES> >

      <JARS>: a list of jar files containing test classes and dependencies. If

        the path is relative, it's assumed to be under /data/local/tmp. Use

        absolute path if the file is elsewhere. Multiple files can be

        specified, separated by space.

      <CLASSES>: a list of test class names to run, separated by comma. To

        a single method, use TestClass#testMethod format. The -e or -c option

        may be repeated. This option is not required and if not provided then

        all the tests in provided jars will be run automatically.

    options:

      --nohup: trap SIG_HUP, so test won't terminate even if parent process

               is terminated, e.g. USB is disconnected.

      -e debug [true|false]: wait for debugger to connect before starting.

      -e runner [CLASS]: use specified test runner class instead. If

        unspecified, framework default runner will be used.

      -e <NAME> <VALUE>: other name-value pairs to be passed to test classes.

        May be repeated.

      -e outputFormat simple | -s: enabled less verbose JUnit style output.

dump: creates an XML dump of current UI hierarchy

    dump [--verbose][file]

      [--compressed]: dumps compressed layout information.

      [file]: the location where the dumped XML should be stored, default is

      /storage/emulated/legacy/window_dump.xml

events: prints out accessibility events until terminated

默认情况下，它会将视图层次结构转储到 $EXTERNAL_STORAGE/window_dump.xml

adb shell uiautomator dump

UI hierchary dumped to: /sdcard/window_dump.xml

通常，您可能希望将该文件提取到PC进行进一步处理，这将是一个额外的步骤。但是有一个巧妙的技巧，它允许将转储和拉入组合成一个命令。使用/dev/tty转储目标将生成一个命令，将整个转储打印到stdout：

adb exec-out uiautomator dump /dev/tty

<?xml version='1.0' encoding='UTF-8' standalone='yes' ?><hierarchy rotation="0"><node ...></node></hierarchy>UI hierchary dumped to: /dev/tty