Android example source code file (LinearLayoutGridTest.java)

This example Android source code file (LinearLayoutGridTest.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, exception, linearlayoutgridtest, mediumtest, singlelaunchactivitytestcase, test, ui, view, viewgroup

The LinearLayoutGridTest.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.test.SingleLaunchActivityTestCase;
import android.test.suitebuilder.annotation.MediumTest;
import android.view.FocusFinder;
import android.view.View;
import android.view.ViewGroup;
import android.widget.focus.LinearLayoutGrid;

/**
 * Tests focus searching between buttons within a grid that are touching, for example,
 * two buttons next two each other would have the left button's right equal to the
 * right button's left.  Same goes for top and bottom edges.
 *
 * This exercises some edge cases of {@link android.view.FocusFinder}.
 */
public class LinearLayoutGridTest extends SingleLaunchActivityTestCase<LinearLayoutGrid> {
    private ViewGroup mRootView;

    public LinearLayoutGridTest() {
        super("com.android.frameworks.coretests", LinearLayoutGrid.class);
    }

    protected void setUp() throws Exception {
        super.setUp();
        mRootView = getActivity().getRootView();
    }

    @MediumTest
    public void testGoDownFromMiddle() {
        assertEquals(getActivity().getButtonAt(2, 1),
                FocusFinder.getInstance().findNextFocus(
                        mRootView,
                        getActivity().getButtonAt(1, 1),
                        View.FOCUS_DOWN));
    }

    @MediumTest
    public void testGoUpFromMiddle() {
        assertEquals(getActivity().getButtonAt(0, 1),
                FocusFinder.getInstance().findNextFocus(
                        mRootView,
                        getActivity().getButtonAt(1, 1),
                        View.FOCUS_UP));
    }

    @MediumTest
    public void testGoRightFromMiddle() {
        assertEquals(getActivity().getButtonAt(1, 2),
                FocusFinder.getInstance().findNextFocus(
                        mRootView,
                        getActivity().getButtonAt(1, 1),
                        View.FOCUS_RIGHT));
    }

    @MediumTest
    public void testGoLeftFromMiddle() {
        assertEquals(getActivity().getButtonAt(1, 0),
                FocusFinder.getInstance().findNextFocus(
                        mRootView,
                        getActivity().getButtonAt(1, 1),
                        View.FOCUS_LEFT));
    }

}