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Android example source code file (ZeroSizedTest.java)

This example Android source code file (ZeroSizedTest.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, bitmap, drawing, exception, graphics, mediumtest, override, paint, runnable, test, ui, view, zerosizedtest

The ZeroSizedTest.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.view;

import android.view.ZeroSized;
import com.android.frameworks.coretests.R;

import android.test.ActivityInstrumentationTestCase;
import android.test.suitebuilder.annotation.MediumTest;
import android.view.View;
import android.graphics.Bitmap;

/**
 * Builds the drawing cache of Views of various dimension. The assumption is that
 * a View with a 0-sized dimension (width or height) will always have a null
 * drawing cache.
 */
public class ZeroSizedTest extends ActivityInstrumentationTestCase<ZeroSized> {
    private View mWithDimension;
    private View mWithNoWdith;
    private View mWithNoHeight;
    private View mWithNoDimension;

    public ZeroSizedTest() {
        super("com.android.frameworks.coretests", ZeroSized.class);
    }

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

        final ZeroSized activity = getActivity();
        mWithDimension = activity.findViewById(R.id.dimension);
        mWithNoWdith = activity.findViewById(R.id.noWidth);
        mWithNoHeight = activity.findViewById(R.id.noHeight);
        mWithNoDimension = activity.findViewById(R.id.noDimension);
    }

    @MediumTest
    public void testSetUpConditions() throws Exception {
        assertNotNull(mWithDimension);
        assertNotNull(mWithNoWdith);
        assertNotNull(mWithNoHeight);
        assertNotNull(mWithNoDimension);
    }

    @MediumTest
    public void testDrawingCacheWithDimension() throws Exception {
        assertTrue(mWithDimension.getWidth() > 0);
        assertTrue(mWithDimension.getHeight() > 0);
        assertNotNull(createCacheForView(mWithDimension));
    }

    @MediumTest
    public void testDrawingCacheWithNoWidth() throws Exception {
        assertTrue(mWithNoWdith.getWidth() == 0);
        assertTrue(mWithNoWdith.getHeight() > 0);
        assertNull(createCacheForView(mWithNoWdith));
    }

    @MediumTest
    public void testDrawingCacheWithNoHeight() throws Exception {
        assertTrue(mWithNoHeight.getWidth() > 0);
        assertTrue(mWithNoHeight.getHeight() == 0);
        assertNull(createCacheForView(mWithNoHeight));
    }

    @MediumTest
    public void testDrawingCacheWithNoDimension() throws Exception {
        assertTrue(mWithNoDimension.getWidth() == 0);
        assertTrue(mWithNoDimension.getHeight() == 0);
        assertNull(createCacheForView(mWithNoDimension));
    }

    private Bitmap createCacheForView(final View view) {
        final Bitmap[] cache = new Bitmap[1];
        getActivity().runOnUiThread(new Runnable() {
            public void run() {
                view.setDrawingCacheEnabled(true);
                view.invalidate();
                view.buildDrawingCache();
                cache[0] = view.getDrawingCache();
            }
        });
        getInstrumentation().waitForIdleSync();
        return cache[0];
    }
}

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