Android example source code file (ListSetSelectionTest.java)

This example Android source code file (ListSetSelectionTest.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

activityinstrumentationtestcase2, android, exception, listsetselectiontest, listsimple, listview, mediumtest, override, set, test, ui, uithreadtest, widget

The ListSetSelectionTest.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.test.ActivityInstrumentationTestCase2;
import android.test.UiThreadTest;
import android.test.suitebuilder.annotation.MediumTest;
import android.widget.ListView;

/**
 * Basic tests of setting & clearing the selection
 */
public class ListSetSelectionTest extends ActivityInstrumentationTestCase2<ListSimple> {
    private ListSimple mActivity;
    private ListView mListView;

    public ListSetSelectionTest() {
        super("com.android.frameworks.coretests", ListSimple.class);
    }

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

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

    @MediumTest
    public void testPreconditions() {
        assertNotNull(mActivity);
        assertNotNull(mListView);
    }
    
    /** Confirm that we can set the selection to each specific position */
    @MediumTest
    @UiThreadTest
    public void testSetSelection() {
        // Set the selection to each position
        int childCount = mListView.getChildCount();
        for (int i=0; i<childCount; i++) {
            mListView.setSelection(i);
            assertEquals("Set selection", i, mListView.getSelectedItemPosition());
        }
    }
    
    /** Confirm that you cannot unset the selection using the same API */
    @MediumTest
    @UiThreadTest
    public void testClearSelection() {
        // Set the selection to first position
        mListView.setSelection(0);
        assertEquals("Set selection", 0, mListView.getSelectedItemPosition());

        // Clear the selection
        mListView.setSelection(ListView.INVALID_POSITION);
        assertEquals("Set selection", 0, mListView.getSelectedItemPosition());
    }
}