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)));
}