Android example source code file (ScrollingThroughListOfFocusablesTest.java)

This example Android source code file (ScrollingThroughListOfFocusablesTest.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

android, drawing, exception, instrumentationtestcase, internalselectionview, largetest, listofinternalselectionviews, listview, mediumtest, override, paint, rect, scrollingthroughlistoffocusablestest, test, ui, view

The ScrollingThroughListOfFocusablesTest.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.focus;

import android.graphics.Rect;
import android.test.InstrumentationTestCase;
import android.test.suitebuilder.annotation.LargeTest;
import android.test.suitebuilder.annotation.MediumTest;
import android.view.KeyEvent;
import android.widget.ListView;
import android.widget.focus.ListOfInternalSelectionViews;
import android.util.InternalSelectionView;


/**
 * TODO: extract base test case that launches {@link ListOfInternalSelectionViews} with
 * bundle params.
 */
public class ScrollingThroughListOfFocusablesTest extends InstrumentationTestCase {

    Rect mTempRect = new Rect();

    private ListOfInternalSelectionViews mActivity;
    private ListView mListView;

    private int mNumItems = 4;
    private int mNumRowsPerItem = 5;
    private double mScreenHeightFactor = 5 /4;

    @Override
    protected void setUp() throws Exception {
        mActivity = launchActivity(
                "com.android.frameworks.coretests",
                ListOfInternalSelectionViews.class,
                ListOfInternalSelectionViews.getBundleFor(
                    mNumItems,      // 4 items
                    mNumRowsPerItem,      // 5 internally selectable rows per item
                    mScreenHeightFactor)); // each item is 5 / 4 screen height tall
        mListView = mActivity.getListView();
    }

    @Override
    protected void tearDown() throws Exception {
        mActivity.finish();
        super.tearDown();
    }

    @MediumTest
    public void testPreconditions() throws Exception {
        assertNotNull(mActivity);
        assertNotNull(mListView);
        assertEquals(mNumItems, mActivity.getNumItems());
        assertEquals(mNumRowsPerItem, mActivity.getNumRowsPerItem());
    }

    // TODO: needs to be adjusted to pass on non-HVGA displays
    // @MediumTest
    public void testScrollingDownInFirstItem() throws Exception {

        for (int i = 0; i < mNumRowsPerItem; i++) {
            assertEquals(0, mListView.getSelectedItemPosition());
            InternalSelectionView view = mActivity.getSelectedView();

            assertInternallySelectedRowOnScreen(view, i);

            // move to next row
            if (i < mNumRowsPerItem - 1) {
                sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
                getInstrumentation().waitForIdleSync();
            }
        }

        {
            assertEquals(0, mListView.getSelectedItemPosition());
            InternalSelectionView view = (InternalSelectionView)
                    mListView.getSelectedView();

            // 1 pixel tolerance in case height / 4 is not an even number
            final int fadingEdge = mListView.getBottom() - mListView.getVerticalFadingEdgeLength();
            assertTrue("bottom of view should be just above fading edge",
                    view.getBottom() >= fadingEdge - 1 &&
                    view.getBottom() <= fadingEdge);
        }


        // make sure fading edge is the expected view
        {
            assertEquals("should be a second view visible due to the fading edge",
                            2, mListView.getChildCount());
            InternalSelectionView peekingChild = (InternalSelectionView)
                    mListView.getChildAt(1);
            assertNotNull(peekingChild);
            assertEquals("wrong value for peeking list item",
                    mActivity.getLabelForPosition(1), peekingChild.getLabel());
        }
    }


    @MediumTest
    public void testScrollingToSecondItem() throws Exception {

        for (int i = 0; i < mNumRowsPerItem; i++) {
            sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
            getInstrumentation().waitForIdleSync();
        }

        assertEquals("should have moved to second item",
                1, mListView.getSelectedItemPosition());
    }

    @LargeTest
    public void testNoFadingEdgeAtBottomOfLastItem() {

        // move down to last item
        for (int i = 0; i < mNumItems; i++) {
            for (int j = 0; j < mNumRowsPerItem; j++) {
                if (i < mNumItems - 1 || j < mNumRowsPerItem - 1) {
                    sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
                    getInstrumentation().waitForIdleSync();
                }
            }
        }

        assertEquals(mNumItems - 1, mListView.getSelectedItemPosition());
        InternalSelectionView view = mActivity.getSelectedView();
        assertEquals(mNumRowsPerItem - 1, view.getSelectedRow());

        view.getRectForRow(mTempRect, mNumRowsPerItem - 1);
        mListView.offsetDescendantRectToMyCoords(view, mTempRect);

        assertTrue("bottom of last row of last item should be at " +
                "the bottom of the list view (no fading edge)",
                mListView.getBottom() - mListView.getVerticalFadingEdgeLength() < mTempRect.bottom);
    }

    @LargeTest
    public void testNavigatingUpThroughInternalSelection() throws Exception {

        // get to bottom of second item
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < mNumRowsPerItem; j++) {
                if (i < 1 || j < mNumRowsPerItem - 1) {
                    sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
                    getInstrumentation().waitForIdleSync();
                }
            }
        }


        // (make sure we are at last row of second item)
        {
            assertEquals(1, mListView.getSelectedItemPosition());
            InternalSelectionView view = mActivity.getSelectedView();
            assertEquals(mNumRowsPerItem - 1, view.getSelectedRow());
        }

        // go back up to the top of the second item
        for (int i = mNumRowsPerItem - 1; i >= 0; i--) {
            assertEquals(1, mListView.getSelectedItemPosition());
            InternalSelectionView view = mActivity.getSelectedView();

            assertInternallySelectedRowOnScreen(view, i);

            // move up to next row
            if (i > 0) {
                sendKeys(KeyEvent.KEYCODE_DPAD_UP);
                getInstrumentation().waitForIdleSync();
            }
        }

        // now we are at top row, should have caused scrolling, and fading edge...
        {
            assertEquals(1, mListView.getSelectedItemPosition());
            InternalSelectionView view = mActivity.getSelectedView();
            assertEquals(0, view.getSelectedRow());

            view.getDrawingRect(mTempRect);
            mListView.offsetDescendantRectToMyCoords(view, mTempRect);
            assertEquals("top of selected row should be just below top vertical fading edge",
                    mListView.getVerticalFadingEdgeLength(),
                    view.getTop());
        }

        // make sure fading edge is the view we expect
        {
            final InternalSelectionView view =
                    (InternalSelectionView) mListView.getChildAt(0);
            assertEquals(mActivity.getLabelForPosition(0), view.getLabel());
        }


    }

    /**
     * @param internalFocused The view to check
     * @param row
     */
    private void assertInternallySelectedRowOnScreen(
            InternalSelectionView internalFocused,
            int row) {
        assertEquals("expecting selected row",
                row, internalFocused.getSelectedRow());

        internalFocused.getRectForRow(mTempRect, row);
        mListView.offsetDescendantRectToMyCoords(internalFocused, mTempRect);

        assertTrue("top of row " + row + " should be on sreen",
                mTempRect.top >= 0);
        assertTrue("bottom of row " + row + " should be on sreen",
                mTempRect.bottom < mActivity.getScreenHeight());
    }
}