Simulate touching a view and dragging it to a specified location. - Android User Interface

Description

Simulate touching a view and dragging it to a specified location.

Demo Code

/*/*from  ww w  .  ja  va2 s. c  om*/
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import android.app.Activity;
import android.app.Instrumentation;
import android.graphics.Point;
import android.os.SystemClock;
import android.view.Display;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;

public class Main{
    /**
     * Simulate touching a view and dragging it to a specified location.
     * 
     * @param test The test case that is being run
     * @param v The view that should be dragged
     * @param gravity Which part of the view to use for the initial down event. A combination of
     *        (TOP, CENTER_VERTICAL, BOTTOM) and (LEFT, CENTER_HORIZONTAL, RIGHT)
     * @param toX Final location of the view after dragging
     * @param toY Final location of the view after dragging
     * 
     * @return distance in pixels covered by the drag
     *
     * @deprecated {@link android.test.ActivityInstrumentationTestCase} is deprecated in favor of
     * {@link android.test.ActivityInstrumentationTestCase2}, which provides more options for
     * configuring the Activity under test
     */
    @Deprecated
    public static int dragViewTo(ActivityInstrumentationTestCase test,
            View v, int gravity, int toX, int toY) {
        return dragViewTo((InstrumentationTestCase) test, v, gravity, toX,
                toY);
    }
    /**
     * Simulate touching a view and dragging it to a specified location.
     * 
     * @param test The test case that is being run
     * @param v The view that should be dragged
     * @param gravity Which part of the view to use for the initial down event. A combination of
     *        (TOP, CENTER_VERTICAL, BOTTOM) and (LEFT, CENTER_HORIZONTAL, RIGHT)
     * @param toX Final location of the view after dragging
     * @param toY Final location of the view after dragging
     * 
     * @return distance in pixels covered by the drag
     */
    public static int dragViewTo(InstrumentationTestCase test, View v,
            int gravity, int toX, int toY) {
        int[] xy = new int[2];

        getStartLocation(v, gravity, xy);

        final int fromX = xy[0];
        final int fromY = xy[1];

        int deltaX = fromX - toX;
        int deltaY = fromY - toY;

        int distance = (int) Math.hypot(deltaX, deltaY);
        drag(test, fromX, toX, fromY, toY, distance);

        return distance;
    }
    /**
     * Get the location of a view. Use the gravity param to specify which part of the view to
     * return.
     * 
     * @param v View to find
     * @param gravity A combination of (TOP, CENTER_VERTICAL, BOTTOM) and (LEFT, CENTER_HORIZONTAL,
     *        RIGHT)
     * @param xy Result
     */
    private static void getStartLocation(View v, int gravity, int[] xy) {
        v.getLocationOnScreen(xy);

        final int viewWidth = v.getWidth();
        final int viewHeight = v.getHeight();

        switch (gravity & Gravity.VERTICAL_GRAVITY_MASK) {
        case Gravity.TOP:
            break;
        case Gravity.CENTER_VERTICAL:
            xy[1] += viewHeight / 2;
            break;
        case Gravity.BOTTOM:
            xy[1] += viewHeight - 1;
            break;
        default:
            // Same as top -- do nothing
        }

        switch (gravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
        case Gravity.LEFT:
            break;
        case Gravity.CENTER_HORIZONTAL:
            xy[0] += viewWidth / 2;
            break;
        case Gravity.RIGHT:
            xy[0] += viewWidth - 1;
            break;
        default:
            // Same as left -- do nothing
        }
    }
    /**
     * Simulate touching a specific location and dragging to a new location.
     * 
     * @param test The test case that is being run
     * @param fromX X coordinate of the initial touch, in screen coordinates
     * @param toX Xcoordinate of the drag destination, in screen coordinates
     * @param fromY X coordinate of the initial touch, in screen coordinates
     * @param toY Y coordinate of the drag destination, in screen coordinates
     * @param stepCount How many move steps to include in the drag
     *
     * @deprecated {@link android.test.ActivityInstrumentationTestCase} is deprecated in favor of
     * {@link android.test.ActivityInstrumentationTestCase2}, which provides more options for
     * configuring the Activity under test
     */
    @Deprecated
    public static void drag(ActivityInstrumentationTestCase test,
            float fromX, float toX, float fromY, float toY, int stepCount) {
        drag((InstrumentationTestCase) test, fromX, toX, fromY, toY,
                stepCount);
    }
    /**
     * Simulate touching a specific location and dragging to a new location.
     * 
     * @param test The test case that is being run
     * @param fromX X coordinate of the initial touch, in screen coordinates
     * @param toX Xcoordinate of the drag destination, in screen coordinates
     * @param fromY X coordinate of the initial touch, in screen coordinates
     * @param toY Y coordinate of the drag destination, in screen coordinates
     * @param stepCount How many move steps to include in the drag
     */
    public static void drag(InstrumentationTestCase test, float fromX,
            float toX, float fromY, float toY, int stepCount) {
        Instrumentation inst = test.getInstrumentation();

        long downTime = SystemClock.uptimeMillis();
        long eventTime = SystemClock.uptimeMillis();

        float y = fromY;
        float x = fromX;

        float yStep = (toY - fromY) / stepCount;
        float xStep = (toX - fromX) / stepCount;

        MotionEvent event = MotionEvent.obtain(downTime, eventTime,
                MotionEvent.ACTION_DOWN, x, y, 0);
        inst.sendPointerSync(event);
        for (int i = 0; i < stepCount; ++i) {
            y += yStep;
            x += xStep;
            eventTime = SystemClock.uptimeMillis();
            event = MotionEvent.obtain(downTime, eventTime,
                    MotionEvent.ACTION_MOVE, x, y, 0);
            inst.sendPointerSync(event);
        }

        eventTime = SystemClock.uptimeMillis();
        event = MotionEvent.obtain(downTime, eventTime,
                MotionEvent.ACTION_UP, x, y, 0);
        inst.sendPointerSync(event);
        inst.waitForIdleSync();
    }
}

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