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Android example source code file (ListItemFocusablesFarApartTest.java)

This example Android source code file (ListItemFocusablesFarApartTest.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, button, exception, listitemfocusablesfaraparttest, listview, mediumtest, override, test, ui, view, viewgroup, widget

The ListItemFocusablesFarApartTest.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.arrowscroll;

import android.test.ActivityInstrumentationTestCase;
import android.test.suitebuilder.annotation.MediumTest;
import android.view.KeyEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ListView;
import android.widget.listview.ListItemFocusablesFarApart;

public class ListItemFocusablesFarApartTest extends ActivityInstrumentationTestCase<ListItemFocusablesFarApart> {
    private ListView mListView;
    private int mListTop;
    private int mListBottom;

    public ListItemFocusablesFarApartTest() {
        super("com.android.frameworks.coretests", ListItemFocusablesFarApart.class);
    }

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        mListView = getActivity().getListView();
        mListTop = mListView.getListPaddingTop();
        mListBottom = mListView.getHeight() - mListView.getListPaddingBottom();
    }

    /**
     * Get the child of a list item.
     * @param listIndex The index of the currently visible items
     * @param index The index of the child.
     */
    public View getChildOfItem(int listIndex, int index) {
        return ((ViewGroup) mListView.getChildAt(listIndex)).getChildAt(index);

    }

    public int getTopOfChildOfItem(int listIndex, int index) {
        ViewGroup listItem = (ViewGroup) mListView.getChildAt(listIndex);
        View child = listItem.getChildAt(index);
        return child.getTop() + listItem.getTop();
    }

    public int getBottomOfChildOfItem(int listIndex, int index) {
        ViewGroup listItem = (ViewGroup) mListView.getChildAt(listIndex);
        View child = listItem.getChildAt(index);
        return child.getBottom() + listItem.getTop();
    }

    @MediumTest
    public void testPreconditions() {
        assertNotNull(mListView);
        assertEquals("should only be one visible list item",
                1, mListView.getChildCount());
        int topOfFirstButton = getTopOfChildOfItem(0, 0);
        int topOfSecondButton = getTopOfChildOfItem(0, 2);
        assertTrue("second button should be more than max scroll away from first",
                topOfSecondButton - topOfFirstButton > mListView.getMaxScrollAmount());
    }


    @MediumTest
    public void testPanWhenNextFocusableTooFarDown() {

        int expectedTop = mListView.getChildAt(0).getTop();

        final Button topButton = (Button) getChildOfItem(0, 0);

        int counter = 0;
        while(getTopOfChildOfItem(0, 2) > mListBottom) {
            // just to make sure we never end up with an infinite loop
            if (counter > 5) fail("couldn't reach next button within " + counter + " downs");

            if (getBottomOfChildOfItem(0, 0) < mListTop) {
                assertFalse("after " + counter + " downs, top button not visible, should not have focus",
                        topButton.isFocused());
                assertFalse("after " + counter + " downs, neither top button nor botom button visible, nothng within first list " +
                        "item should have focus", mListView.getChildAt(0).hasFocus());
            } else {
                assertTrue("after " + counter + " downs, top button still visible, should have focus",
                        topButton.isFocused());
            }

            assertEquals("after " + counter + " downs, " +
                    "should have panned by max scroll amount",
                    expectedTop, mListView.getChildAt(0).getTop());

            sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
            expectedTop -= mListView.getMaxScrollAmount();
            counter++;
        }

        // at this point, the second button is visible on screen.
        // it should have focus
        assertTrue("second button should have focus",
                getChildOfItem(0, 2).isFocused());
    }

}

Other Android examples (source code examples)

Here is a short list of links related to this Android ListItemFocusablesFarApartTest.java source code file:

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