这个类提供了安装和卸载程序包、启动一个活动以及发送键盘或触摸事件到应用程序的方法。

This class provides methods for installing and uninstalling packages, starting an Activity, and sending keyboard or touch events to an application.

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它依赖许多按以下顺序运行的其他目标：清理、初始化、签出、构建、安装、启动、停止和卸载。

It has dependencies to a number of other targets that are run in this sequence: clean, init, checkout, build, install, start, test, stop, and uninstall.

youdao