Android MediaMetadataRetriever 测试源代码示例

The MediaMetadataRetrieverTest.java Android example source code
/*
 * Copyright (C) 2008 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 com.android.mediaframeworktest.unit;

import android.util.Log;
import android.media.MediaMetadataRetriever;
import android.graphics.Bitmap;
import java.io.FileOutputStream;
import android.test.AndroidTestCase;
import com.android.mediaframeworktest.MediaNames;
import com.android.mediaframeworktest.MediaProfileReader;
import android.test.suitebuilder.annotation.*;

/**
 * WARNING:

 * Currently, captureFrame() does not work, due to hardware access permission problem.
 * We are currently only testing the metadata/album art retrieval features.
 */
public class MediaMetadataRetrieverTest extends AndroidTestCase {
    
    private static final String TAG         = "MediaMetadataRetrieverTest";
   
    // Test album art extraction.
    @MediumTest
    public static void testAlbumArt() throws Exception {
        Log.v(TAG, "testAlbumArt starts.");
        MediaMetadataRetriever retriever = new MediaMetadataRetriever();
        boolean supportWMA = MediaProfileReader.getWMAEnable();
        boolean hasFailed = false;
        boolean supportWMV = MediaProfileReader.getWMVEnable();
        retriever.setMode(MediaMetadataRetriever.MODE_GET_METADATA_ONLY);
        for (int i = 0, n = MediaNames.ALBUMART_TEST_FILES.length; i < n; ++i) {
            try {
                Log.v(TAG, "File " + i + ": " + MediaNames.ALBUMART_TEST_FILES[i]);
                if ((MediaNames.ALBUMART_TEST_FILES[i].endsWith(".wma") && !supportWMA) ||
                    (MediaNames.ALBUMART_TEST_FILES[i].endsWith(".wmv") && !supportWMV)
                   ) {
                    Log.v(TAG, "windows media is not supported and thus we will skip the test for this file");
                    continue;
                }
                retriever.setDataSource(MediaNames.ALBUMART_TEST_FILES[i]);
                byte[] albumArt = retriever.extractAlbumArt();

                // TODO:
                // A better test would be to compare the retrieved album art with the