按键与KEYCODE使用
一、手机常见按键：
1）HOME 主屏幕键
2) MENU 菜单键
3) BACK 返回键
4) VOLUME_UP 音量加键
5) VOLUME_DOWN 音量减键
6) RecentApps 最近使用app
7) POWER 电源键
8) Dpad 上下左右键
9) ......
二、按键API说明：
| 返回值 | 方法名 | 描述 |
| boolean | pressBace() | 模拟短按返回back键 |
| boolean | pressDPadCenter() | 模拟轨迹球中点按键 |
| boolean | pressDPadDown() | 模拟轨迹球向下按键 |
| boolean | pressDPadLeft() | 模拟轨迹球向左按键 |
| boolean | pressDPadRight() | 模拟轨迹球向右按键 |
| boolean | pressDPadUp() | 模拟轨迹球向上按键 |
| boolean | pressDelete() | 模拟短按删除delete按键 |
| boolean | pressEnter() | 模拟短按回车键 |
| boolean | pressHome() | 模拟短按home键 |
| boolean | pressKeyCode(int keyCode, int metaState) | 模拟短按键盘代码keyCode |
| boolean | pressKeyCode(int keyCode) | 模拟短按键盘代码keyCode |
| boolean | pressMenu() | 模拟短按menu键 |
| boolean | pressRecentApps() | 模拟短按最近使用程序 |
| boolean | pressSearch() | 模拟短按搜索键 |
举例：
package com.uiautomatortest; import android.os.Bundle; import android.os.RemoteException; import com.android.uiautomator.core.UiDevice; import com.android.uiautomator.testrunner.UiAutomatorTestCase; public class Test extends UiAutomatorTestCase { public void testHome(){ UiDevice.getInstance().pressHome(); sleep(2000); } public void testMenu(){ UiDevice.getInstance().pressMenu(); sleep(2000); } public void testRecent() throws RemoteException{ UiDevice.getInstance().pressRecentApps(); sleep(2000); } }