Android提供了多种方式来打开特定文件夹中的视频

使��� MediaStore获取指定文件夹的视频，更优化方法：

import android.content.ContentResolver;import android.content.ContentValues;import android.content.Context;import android.net.Uri;import android.os.Build;import android.os.Environment;import android.provider.MediaStore;import android.support.annotation.RequiresApi;import android.webkit.MimeTypeMap;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.nio.file.Files;public class VideoUtils {    public static final String VIDEO_DIR = "videoData";    public static Uri saveVideoToExternalStorage(Context context, File videoFile) throws IOException {        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q) {            // 分区存储模式下需要使用MediaStore API            return insertVideoWithMediaStore(context, videoFile);        } else {            // 旧存储模型可以直接写入文件            return writeVideoToExternalFilesDir(context, videoFile);        }    }    @RequiresApi(api = Build.VERSION_CODES.O)    private static Uri insertVideoWithMediaStore(Context context, File videoFile) {        // 获取文件的MIME类型        String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(videoFile.getName().substring(videoFile.getName().lastIndexOf('.')));        ContentValues values = new ContentValues();        values.put(MediaStore.Video.Media.DISPLAY_NAME, videoFile.getName());        values.put(MediaStore.Video.Media.MIME_TYPE, "video/mp4");        values.put(MediaStore.Video.Media.RELATIVE_PATH, Environment.DIRECTORY_MOVIES + "/" + VIDEO_DIR);        ContentResolver resolver = context.getContentResolver();        Uri uri = resolver.insert(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, values);        if (uri != null) {            try (OutputStream outputStream = context.getContentResolver().openOutputStream(uri)) {                Files.copy(videoFile.toPath(), outputStream);            } catch (IOException e) {                e.printStackTrace();            }        }        return uri;    }    public static Uri saveVideoToExternalStorage2(Context context, File videoFile) throws IOException {        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q) {            // 分区存储模式下需要使用MediaStore API            return insertVideoWithMediaStore(context, videoFile);        } else {            // 旧存储模型可以直接写入文件            return writeVideoToExternalFilesDir(context, videoFile);        }    }    /**     * 将视频文件保存到应用的专属外部存储目录。     *     * @param context   应用的 Context     * @param videoFile 要保存的视频文件     * @return 保存视频文件的 Uri     * @throws IOException 如果文件写入过程中发生错误     */    public static Uri writeVideoToExternalFilesDir(Context context, File videoFile) throws IOException {        // Get the external files directory for the app        File externalFilesDir = context.getExternalFilesDir(null);        if (externalFilesDir != null) {            // Create a unique name for the video file in the external directory            File outputFile = new File(externalFilesDir, getFileName(videoFile.getAbsolutePath())); // Use a meaningful file name            // Ensure the parent directory exists            outputFile.getParentFile().mkdirs();            // Open a buffered input stream from the source file and a buffered output stream to the destination file            try (FileInputStream inputStream = new FileInputStream(videoFile);                 BufferedInputStream bufferedInput = new BufferedInputStream(inputStream);                 FileOutputStream outputStream = new FileOutputStream(outputFile);                 BufferedOutputStream bufferedOutput = new BufferedOutputStream(outputStream)) {                byte[] buffer = new byte[4096];                int bytesRead;                while ((bytesRead = bufferedInput.read(buffer)) != -1) {                    bufferedOutput.write(buffer, 0, bytesRead);                }            }            return Uri.fromFile(outputFile);        }        return null;    }}