如何使用 Android UiAutomation.injectInputEvent 注入点击事件

我正在自动测试我安装设备管理员的应用程序中的流程。要在大多数设备上激活设备管理员（假设这里没有一些企业 API 可以让我像三星提供的那样执行此操作），系统会向用户显示一个弹出窗口，然后用户必须单击“激活”按钮。

我在用着Robotium和 Android JUnit 来驱动我的测试。在正常的测试情况下，人们只能与被测应用程序和进程交互，而不能与出现的任何系统活动交互。

The Ui自动化声称允许您通过利用无障碍框架，然后允许一个注入任意输入事件.

所以 - 这就是我想做的：

public class AbcTests extends ActivityInstrumentationTestCase2<AbcActivity> {

    private Solo mSolo

    @Override
    public void setUp() {
        mSolo = new Solo(getInstrumentation(), getActivity());

    }

    ...

    public void testAbc(){
    
        final UiAutomation automation = getInstrumentation().getUiAutomation();         
        
        MotionEvent motionDown = MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), KeyEvent.ACTION_DOWN,
                100,  100, 0);

        automation.injectInputEvent(motionDown, true)
        MotionEvent motionUp = MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), KeyEvent.ACTION_UP,
                100, 100, 0);

        automation.injectInputEvent(motionUp, true)
        motionUp.recycle();
        motionDown.recycle();
     }
    
 }

运行此测试时，系统弹出窗口“激活”，设备管理员处于活动状态，我只想单击屏幕。出于本问题的目的，我已将 100,100 硬编码为点击位置，但实际上我将点击屏幕的右下角，以便点击按钮。

我没有收到屏幕上发生任何点击事件。有人对此有经验吗？有其他选择可以做我想做的事吗？据我了解，很少有工具可以做到这一点。

Thanks.

Update Added setSource为了正确答案

终于明白了这一点。我将 MotionEvent 与单击按钮时调度的两个事件进行了比较，唯一的区别是源。因此，我在两个motionEvents上设置了源并且它起作用了。

....
motionDown.setSource(InputDevice.SOURCE_TOUCHSCREEN);
....
motionUp.setSource(InputDevice.SOURCE_TOUCHSCREEN);

这是该方法的完整版本

//=========================================================================
//==                        Utility Methods                             ===
//=========================================================================
/**
 * Helper method injects a click event at a point on the active screen via the UiAutomation object.
 * @param x the x position on the screen to inject the click event
 * @param y the y position on the screen to inject the click event
 * @param automation a UiAutomation object rtreived through the current Instrumentation
 */
static void injectClickEvent(float x, float y, UiAutomation automation){
    //A MotionEvent is a type of InputEvent.  
    //The event time must be the current uptime.
    final long eventTime = SystemClock.uptimeMillis();

    //A typical click event triggered by a user click on the touchscreen creates two MotionEvents,
    //first one with the action KeyEvent.ACTION_DOWN and the 2nd with the action KeyEvent.ACTION_UP
    MotionEvent motionDown = MotionEvent.obtain(eventTime, eventTime, KeyEvent.ACTION_DOWN,
            x,  y, 0); 
    //We must set the source of the MotionEvent or the click doesn't work.
    motionDown.setSource(InputDevice.SOURCE_TOUCHSCREEN);
    automation.injectInputEvent(motionDown, true);
    MotionEvent motionUp = MotionEvent.obtain(eventTime, eventTime, KeyEvent.ACTION_UP,
            x, y, 0);
    motionUp.setSource(InputDevice.SOURCE_TOUCHSCREEN);
    automation.injectInputEvent(motionUp, true);
    //Recycle our events back to the system pool.
    motionUp.recycle();
    motionDown.recycle();
}