Android example source code file (ListItemRequestRectAboveThinFirstItemTest.java)

This example Android source code file (ListItemRequestRectAboveThinFirstItemTest.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, drawing, exception, graphics, largetest, listitemrequestrectabovethinfirstitemtest, listview, mediumtest, paint, rect, test, ui, view

The ListItemRequestRectAboveThinFirstItemTest.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.graphics.Rect;
import android.test.ActivityInstrumentationTestCase;
import android.test.suitebuilder.annotation.LargeTest;
import android.test.suitebuilder.annotation.MediumTest;
import android.view.View;
import android.view.KeyEvent;
import android.widget.ListView;
import android.widget.listview.ListOfThinItems;

public class ListItemRequestRectAboveThinFirstItemTest
        extends ActivityInstrumentationTestCase<ListOfThinItems> {
    private ListView mListView;

    public ListItemRequestRectAboveThinFirstItemTest() {
        super("com.android.frameworks.coretests", ListOfThinItems.class);
    }

    protected void setUp() throws Exception {
        super.setUp();
        mListView = getActivity().getListView();
    }

    @MediumTest
    public void testPreconditions() {

        assertTrue("first child needs to be within fading edge height",
                mListView.getChildAt(0).getBottom() < mListView.getVerticalFadingEdgeLength());
        assertTrue("should be at least two visible children",
                mListView.getChildCount() >= 2);
    }

    // reproduce bug 998501: when first item fits within fading edge,
    // having the second item call requestRectangleOnScreen with a rect above
    // the bounds of the list, it was scrolling too far
    @MediumTest
    public void testSecondItemRequestRectAboveTop() throws Exception {

        sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
        assertEquals("selected position", 1, mListView.getSelectedItemPosition());

        final View second = mListView.getChildAt(1);
        final Rect rect = new Rect();
        second.getDrawingRect(rect);
        rect.offset(0, -2 * second.getBottom());

        getActivity().requestRectangleOnScreen(1, rect);
        getInstrumentation().waitForIdleSync();        

        assertEquals("top of first item",
                mListView.getListPaddingTop(), mListView.getChildAt(0).getTop());

    }

    // same thing, but at bottom
    @LargeTest
    public void testSecondToLastItemRequestRectBelowBottom() throws Exception {

        final int secondToLastPos = mListView.getCount() - 2;

        while (mListView.getSelectedItemPosition() < secondToLastPos) {
            sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
        }
        assertEquals("selected position", secondToLastPos,
                mListView.getSelectedItemPosition());

        final View secondToLast = mListView.getSelectedView();
        final Rect rect = new Rect();
        secondToLast.getDrawingRect(rect);
        rect.offset(0,
                2 * (mListView.getBottom() - secondToLast.getTop()));

        final int secondToLastIndex = mListView.getChildCount() - 2;
        getActivity().requestRectangleOnScreen(secondToLastIndex, rect);
        getInstrumentation().waitForIdleSync();

        int listBottom = mListView.getHeight() - mListView.getPaddingBottom();
        assertEquals("bottom of last item should be at bottom of list",
                listBottom,
                mListView.getChildAt(mListView.getChildCount() - 1).getBottom());
    }



}