1.运行AS的 run->Record Espresso Test, 之后关掉，这一步会自动添加依赖关系
2.在ExampleInstrumentedTest或其他安卓测试类中定义 ↓，Activity为启动Activity
@Rule
public ActivityScenarioRule<MainActivity> activityScenarioRule
= new ActivityScenarioRule<>(MainActivity.class);
3.在代码中使用
onView(withId(R.id.output_view)).perform(actionWithAssertions(new GeneralSwipeAction(
Swipe.SLOW,
GeneralLocation.CENTER,
new CoordinatesProvider() {
@Override
public float[] calculateCoordinates(View view) {
return getCoordinates(view, 0, (int) (400 * Math.random()));
}
},
Press.FINGER)));
onView(withId(R.id.type)).perform(new WaitForView(obj -> withText("S").matches(obj), 100000));
onView(withId(R.id.output_view)).perform(actionWithAssertions(new GeneralSwipeAction(
Swipe.SLOW,
GeneralLocation.CENTER,
new CoordinatesProvider() {
@Override
public float[] calculateCoordinates(View view) {
return getCoordinates(view, 0, (int) (-400 * Math.random()));
}
},
Press.FINGER)));
onView(withId(R.id.type)).perform(new WaitForView(obj -> withText("S").matches(obj), 100000));
onView(withId(R.id.output_view)).perform(actionWithAssertions(new GeneralSwipeAction(
Swipe.SLOW,
GeneralLocation.CENTER,
new CoordinatesProvider() {
@Override
public float[] calculateCoordinates(View view) {
return getCoordinates(view, 0, -400);
}
},
Press.FINGER)));
onView(withId(R.id.type)).perform(new WaitForView(obj -> withText("S").matches(obj), 100000));
testVideosToggleLoop();
IdlingRegistry.getInstance().register(new IdlingResource() {
@Override
public String getName() {
return null;
}
@Override
public boolean isIdleNow() {
return false;
}
@Override
public void registerIdleTransitionCallback(ResourceCallback callback) {
}
});
}
private static float[] getCoordinates(View view, int vertical, int horizontal) {
final int[] xy = new int[2];
view.getLocationOnScreen(xy);
final float x = xy[0] + (view.getWidth() - 1) / 2 + horizontal;
final float y = xy[1] + (view.getHeight() - 1) / 2 + vertical;
float[] coordinates = {x, y};
return coordinates;
}
4. 等待View的特定状态
/**
* This ViewAction tells espresso to wait till a certain view is found in the view hierarchy.
*
* @param test The id of the view to wait for.
* @param timeout The maximum time which espresso will wait for the view to show up (in milliseconds)
*/
class WaitForView implements ViewAction {
private final int timeout;
private final Predicate test;
WaitForView(Predicate<View> test, int timeout) {
super();
this.test = test;
this.timeout = timeout;
}
@Override
public Matcher<View> getConstraints() {
return Matchers.is(instanceOf(View.class));
}
public String getDescription() {
return "wait for a specific test; during " + timeout + " millis.";
}
public void perform(UiController uiController, View rootView) {
uiController.loopMainThreadUntilIdle();
long startTime = System.currentTimeMillis();
long endTime = startTime + timeout;
do {
// Iterate through all views on the screen and see if the view we are looking for is there already
// for (View child :
// TreeIterables.breadthFirstViewTraversal(rootView)) {
// // found view with required ID
// if (matchers.matches(child)) {
// return true;
// }
// }
if (test.test(rootView)) {
return;
}
// Loops the main thread for a specified period of time.
// Control may not return immediately, instead it'll return after the provided delay has passed and the queue is in an idle state again.
uiController.loopMainThreadForAtLeast(100);
} while (System.currentTimeMillis() < endTime); // in case of a timeout we throw an exception -> test fails
throw new PerformException.Builder()
.withCause(new TimeoutException())
.withActionDescription(getDescription())
.withViewDescription(HumanReadables.describe(rootView))
.build();
}
}
