espresso Seekbar

 package test.utils;

 import android.support.test.espresso.PerformException;
 import android.support.test.espresso.ViewAction;
 import android.support.test.espresso.action.CoordinatesProvider;
 import android.support.test.espresso.action.GeneralSwipeAction;
 import android.support.test.espresso.action.Press;
 import android.support.test.espresso.action.Swipe;
 import android.support.test.espresso.util.HumanReadables;
 import android.view.View;
 import android.widget.SeekBar;

 import static android.support.test.espresso.action.ViewActions.actionWithAssertions;

 /**
  * Created by qiantao on 17-10-19.
  */

 public class SeekBarActions {
     public static ViewAction scrubSeekBarAction(int progress) {
         return actionWithAssertions(new GeneralSwipeAction(
                 Swipe.SLOW,
                 new SeekBarThumbCoordinatesProvider(-1),
                 new SeekBarThumbCoordinatesProvider(progress),
                 Press.PINPOINT));
     }

     /**
      * -1 表示起始位置
      */
     private static class SeekBarThumbCoordinatesProvider implements CoordinatesProvider {
         int mProgress;

         public SeekBarThumbCoordinatesProvider(int progress) {
             mProgress = progress;
         }

         private static float[] getVisibleLeftTop(View view) {
             final int[] xy = new int[2];
             view.getLocationOnScreen(xy);
             return new float[]{(float) xy[0], (float) xy[1]};
         }

         @Override
         public float[] calculateCoordinates(View view) {
             if (!(view instanceof SeekBar)) {
                 throw new PerformException.Builder()
                         .withViewDescription(HumanReadables.describe(view))
                         .withCause(new RuntimeException(String.format("SeekBar expected"))).build();
             }
             SeekBar seekBar = (SeekBar) view;
             int width = seekBar.getWidth() - seekBar.getPaddingLeft() - seekBar.getPaddingRight();
             LogUtils.i("seekBar.getProgress():" + seekBar.getProgress());
             double progress = mProgress == -1 ? seekBar.getProgress() : (mProgress * seekBar.getMax() / 100);
             int xPosition = (int) (seekBar.getPaddingLeft() + (width * progress / seekBar.getMax()));
             float[] xy = getVisibleLeftTop(seekBar);
             return new float[]{xy[0] + xPosition, xy[1]};
         }
     }
 }

检查Mtacher

    public static Matcher<View> withSeekBarProgress(final int expectedProgress) {
        return new BoundedMatcher<View, SeekBar>(SeekBar.class) {
            @Override
            public void describeTo(Description description) {
                description.appendText("expected: ");
                description.appendText("" + expectedProgress);
            }

            @Override
            public boolean matchesSafely(SeekBar seekBar) {
                LogUtils.i("seekBar.getProgress():" + seekBar.getProgress());
                return seekBar.getProgress()*100/seekBar.getMax() == expectedProgress;
            }
        };
    }

用法

for (int i = 0; i <= 100; i += 50) {    
　　onView(seekBarViewMatcher).perform(SeekBarActions.scrubSeekBarAction(i));    
　　onView(seekBarViewMatcher).check(matches(withSeekBarProgress(i)));
}