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Android example source code file (ListScrollListenerTest.java)

This example Android source code file (ListScrollListenerTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

activityinstrumentationtestcase, android, app, arrow, exception, full, keyevent, largetest, listscrolllistenertest, listview, mediumtest, override, page, test, touch, ui, view, widget

The ListScrollListenerTest.java Android example source code

/*
 * 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.
 */

package android.widget.listview;

import android.app.Instrumentation;
import android.test.ActivityInstrumentationTestCase;
import android.test.suitebuilder.annotation.LargeTest;
import android.test.suitebuilder.annotation.MediumTest;
import android.view.KeyEvent;
import android.widget.AbsListView;
import android.widget.ListView;

import android.test.TouchUtils;

public class ListScrollListenerTest extends ActivityInstrumentationTestCase<ListScrollListener> implements
        AbsListView.OnScrollListener {
    private ListScrollListener mActivity;
    private ListView mListView;
    private int mFirstVisibleItem = -1;
    private int mVisibleItemCount = -1;
    private int mTotalItemCount = -1;

    public ListScrollListenerTest() {
        super("com.android.frameworks.coretests", ListScrollListener.class);
    }

    @Override
    protected void setUp() throws Exception {
        super.setUp();

        mActivity = getActivity();
        mListView = getActivity().getListView();
        mListView.setOnScrollListener(this);
    }

    @MediumTest
    public void testPreconditions() {
        assertNotNull(mActivity);
        assertNotNull(mListView);
        
        assertEquals(0, mFirstVisibleItem);
    }
    
    @LargeTest
    public void testKeyScrolling() {
        Instrumentation inst = getInstrumentation();
        
        int firstVisibleItem = mFirstVisibleItem;
        for (int i = 0; i < mVisibleItemCount * 2; i++) {
            inst.sendCharacterSync(KeyEvent.KEYCODE_DPAD_DOWN);
        }
        inst.waitForIdleSync();
        assertTrue("Arrow scroll did not happen", mFirstVisibleItem > firstVisibleItem);
        
        firstVisibleItem = mFirstVisibleItem;
        inst.sendCharacterSync(KeyEvent.KEYCODE_SPACE);
        inst.waitForIdleSync();
        assertTrue("Page scroll did not happen", mFirstVisibleItem > firstVisibleItem);
        
        firstVisibleItem = mFirstVisibleItem;
        KeyEvent down = new KeyEvent(0, 0, KeyEvent.ACTION_DOWN, 
                KeyEvent.KEYCODE_DPAD_DOWN, 0, KeyEvent.META_ALT_ON);
        KeyEvent up = new KeyEvent(0, 0, KeyEvent.ACTION_UP, 
                KeyEvent.KEYCODE_DPAD_DOWN, 0, KeyEvent.META_ALT_ON);
        inst.sendKeySync(down);
        inst.sendKeySync(up);
        inst.waitForIdleSync();
        
        assertTrue("Full scroll did not happen", mFirstVisibleItem > firstVisibleItem);
        assertEquals("Full scroll did not happen", mTotalItemCount, 
                mFirstVisibleItem + mVisibleItemCount);    
    }

    @LargeTest
    public void testTouchScrolling() {
        int firstVisibleItem = mFirstVisibleItem;
        TouchUtils.dragQuarterScreenUp(this);
        TouchUtils.dragQuarterScreenUp(this);
        assertTrue("Touch scroll did not happen", mFirstVisibleItem > firstVisibleItem);
    }

    
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        mFirstVisibleItem = firstVisibleItem;
        mVisibleItemCount = visibleItemCount;
        mTotalItemCount = totalItemCount;
    }

    public void onScrollStateChanged(AbsListView view, int scrollState) {        
    }
}

Other Android examples (source code examples)

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