Simulate touching the center of a view and releasing quickly (before the tap timeout). - Android User Interface

Android examples for User Interface:Touch Event

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Description

Simulate touching the center of a view and releasing quickly (before the tap timeout).

Demo Code

/*/*w w  w.  j ava2s .co m*/
 * 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 the center of a view and releasing quickly (before the tap timeout).
     * 
     * @param test The test case that is being run
     * @param v The view that should be clicked
     */
    public static void tapView(InstrumentationTestCase test, View v) {
        int[] xy = new int[2];
        v.getLocationOnScreen(xy);

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

        final float x = xy[0] + (viewWidth / 2.0f);
        float y = xy[1] + (viewHeight / 2.0f);

        Instrumentation inst = test.getInstrumentation();

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

        MotionEvent event = MotionEvent.obtain(downTime, eventTime,
                MotionEvent.ACTION_DOWN, x, y, 0);
        inst.sendPointerSync(event);
        inst.waitForIdleSync();

        eventTime = SystemClock.uptimeMillis();
        final int touchSlop = ViewConfiguration.get(v.getContext())
                .getScaledTouchSlop();
        event = MotionEvent.obtain(downTime, eventTime,
                MotionEvent.ACTION_MOVE, x + (touchSlop / 2.0f), y
                        + (touchSlop / 2.0f), 0);
        inst.sendPointerSync(event);
        inst.waitForIdleSync();

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

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