android–ExifInterface构造函数抛出IOExxception

概述在尝试使用文件路径初始化exif接口实例时,我无法找出ExifInterface构造函数抛出的异常.更新请根据要求查看下面的详细代码.文件下载功能publicvoiddownloadAndSaveFile(Stringurl,StringdirectoryId,StringfileName){HttpURLConnectionconn=null;try{

在尝试使用文件路径初始化exif接口实例时,我无法找出ExifInterface构造函数抛出的异常.

更新
请根据要求查看下面的详细代码.

文件下载功能

public voID downloadAndSavefile(String url, String directoryID, String filename) {    httpURLConnection conn = null;    try {        Log.d(TAG, "DownloadfileTask url : " + url);        conn = getGETConnection(url);        conn.setRequestProperty("Accept", "application/Json");        conn.setRequestProperty("Content-Type", "application/Json");        conn.setRequestProperty("Authorization", "Bearer " + MY_AUTH_TOKEN);        conn.connect();        file file = new file(fileTools.getCachefileLocation(filename, directoryID));        fileOutputStream fileOutput = new fileOutputStream(file);        inputStream inputStream = (inputStream) conn.getinputStream();        byte[] buffer = new byte[1024 * 1024];        int bufferLength = 0;        while ((bufferLength = inputStream.read(buffer)) > 0) {            fileOutput.write(buffer, 0, bufferLength);        }        fileOutput.close();        inputStream.close();        Log.d(TAG, "Download successful. Downloaded file : " + file.getabsolutePath());        // Generate thumbnail and encrypt the file and thumbnail        ***String thumbnailPath = fileTools.cachethumbnail(file, file.getname(), directoryID);***        if (thumbnailPath != null && !thumbnailPath.isEmpty()) {            // Encrypt the file            try {                fileTools.SavefileEncrypted(file, directoryID);            } catch (Exception e) {                e.printstacktrace();                // Delete the file                file.delete();            }        } else {            // Delete the file            file.delete();        }    } catch (Exception e) {        Log.d(TAG, "Exception while downloading file");        e.printstacktrace();    } finally {        if (conn != null) {            conn.disconnect();        }    }}

fileTools.cachethumbnail函数

public static String cachethumbnail(file file, String filename, String chatID) {    Log.d(TAG, "cachethumbnail original file path : " + file.getabsolutePath());    Log.d(TAG, "cachethumbnail original file exists : " + file.exists());    Log.d(TAG, "cachethumbnail original file size : " + file.length());    String thumbname = String.format("thumb-%s.jpg", filename);    file fileThumb = new file(fileTools.getMediaCachePath(chatID), thumbname);    ByteArrayOutputStream out = null;    try {        out = new ByteArrayOutputStream();        BitmapFactory.Options options = new BitmapFactory.Options();        Bitmap image = thumbnailUtils.extractthumbnail(BitmapFactory.decodefile(file.toURI().getPath(), options), 256, 256, thumbnailUtils.OPTIONS_RECYCLE_input);        // thumbnail generation for the image Failed. It is a vIDeo file. Generate        // thumbnail for the vIDeo file        if (image == null) {            MediaMetadataRetrIEver retrIEver = new MediaMetadataRetrIEver();            try {                retrIEver.setDataSource(fileTools.getfileinputStreamFromStorage(file).getFD());                // Generate thumbnail from a frame that is 5% deep into the vIDeo                String time = retrIEver.extractMetadata(MediaMetadataRetrIEver.MetaDATA_KEY_DURATION);                long timeInMillisec = Long.parseLong(time);                long durationMicroSec = timeInMillisec * 1000;                long thumbnailDepth = (long) (durationMicroSec * (0.15f));                image = retrIEver.getFrameatTime(thumbnailDepth, MediaMetadataRetrIEver.OPTION_CLOSEST);                image = thumbnailUtils.extractthumbnail(image, 256, 256, thumbnailUtils.OPTIONS_RECYCLE_input);            } catch (IllegalArgumentException ex) {                Log.e(TAG, ex.getMessage());                image = null;            } catch (RuntimeException ex) {                Log.e(TAG, ex.getMessage());                image = null;            } catch (IOException e) {                image = null;                Log.e(TAG, e.getMessage());            }        }        // Could not generate a thumbnail. Probably a corrupt/bad file        if (image == null) {            return null;        }        ***image = UtilitIEs.orIEntBitmap(file.getabsolutePath(), image);***        image.compress(Bitmap.CompressFormat.JPEG, 80, out);        out.close();        fileTools.SavefileEncrypted(fileThumb, out.toByteArray());        return fileThumb.toURI().getPath();    } catch (Exception e) {        e.printstacktrace();        return null;    } finally {        try {            if (out != null) {                out.close();            }        } catch (Exception ignore) {        }    }}

orIEntBitmap和rotateBitmap函数功能

public static Bitmap orIEntBitmap(String filePath, Bitmap bitmap) throws IOException {    Log.d(TAG, "orIEntBitmap filePath : " + filePath);    file file = new file(filePath);    Log.d(TAG, "orIEntBitmap file exists : " + file.exists());    ExifInterface exifInterface = new ExifInterface(filePath);    Log.d(TAG, "After exception");    int orIEntation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_norMAL);    Log.d(TAG, "Thumb orIEntation : " + orIEntation);    switch (orIEntation) {        case ExifInterface.ORIENTATION_ROTATE_90:            bitmap = rotateBitmap(bitmap, 90);            break;        case ExifInterface.ORIENTATION_ROTATE_180:            bitmap = rotateBitmap(bitmap, 180);            break;        case ExifInterface.ORIENTATION_ROTATE_270:            bitmap = rotateBitmap(bitmap, 270);            break;    }    return bitmap;}public static Bitmap rotateBitmap(Bitmap source, float angle) {    Matrix matrix = new Matrix();    matrix.postRotate(angle);    return Bitmap.createBitmap(source, 0, 0, source.getWIDth(), source.getHeight(), matrix, true);}

我在尝试生成mp4文件和png文件的缩略图时通过发布堆栈跟踪来更新堆栈跟踪.

mp4文件的堆栈跟踪.

D/DownloadfileClass: downloadAndSavefile url : example.com/media/download/568405D/DownloadfileClass: Download successful. Downloaded file : /data/user/0/com.mypackage.myapp/cache/userhash/79640/media/MP4_20161017_134641.mp4D/fileTools: cachethumbnail original file path : /data/user/0/com.mypackage.myapp/cache/userhash/79640/media/MP4_20161017_134641.mp4D/fileTools: cachethumbnail original file exists : trueD/fileTools: cachethumbnail original file size : 6434816D/skia: --- Skimagedecoder::Factory returned nullD/UtilitIEs: orIEntBitmap filePath : /data/user/0/com.mypackage.myapp/cache/userhash/79640/media/MP4_20161017_134641.mp4D/UtilitIEs: orIEntBitmap file exists : trueW/ExifInterface: InvalID image.    java.io.IOException: InvalID marker: 0    at androID.media.ExifInterface.getJpegAttributes(ExifInterface.java:1600)           at androID.media.ExifInterface.loadAttributes(ExifInterface.java:1339)           at androID.media.ExifInterface.<init>(ExifInterface.java:1057)           at com.mypackage.helpers.UtilitIEs.orIEntBitmap(UtilitIEs.java:85)           at com.mypackage.fileio.fileTools.cachethumbnail(fileTools.java:700)           at com.mypackage.coreAPI.DownloadfileClass$downloadAndSavefile(DownloadfileClass.java:215)           at com.mypackage.coreAPI.DownloadfileClass$downloadAndSavefile(DownloadfileClass.java:113)           at androID.os.AsyncTask.call(AsyncTask.java:295)           at java.util.concurrent.FutureTask.run(FutureTask.java:237)           at androID.os.AsyncTask$SerialExecutor.run(AsyncTask.java:234)           at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)           at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)           at java.lang.Thread.run(Thread.java:818)D/UtilitIEs: After exceptionD/UtilitIEs: Thumb orIEntation : 0D/fileTools: Save file to : /data/user/0/com.mypackage.myapp/cache/userhash/79640/media/MP4_20161017_134641.mp4D/EncryptedfileTools: ......Final saved file path...... : /data/user/0/com.mypackage.myapp/cache/userhash/79640/media/encryptPlaceHolder

png文件的堆栈跟踪

D/DownloadfileClass: downloadAndSavefile url : example.com/media/download/568406D/DownloadfileClass: Download successful. Downloaded file : /data/user/0/com.mypackage.myapp/cache/userhash/79640/media/PNG_20161017_134748.pngD/fileTools: cachethumbnail original file path : /data/user/0/com.mypackage.myapp/cache/userhash/79640/media/PNG_20161017_134748.pngD/fileTools: cachethumbnail original file exists : trueD/fileTools: cachethumbnail original file size : 92160D/UtilitIEs: orIEntBitmap filePath : /data/user/0/com.mypackage.myapp/cache/userhash/79640/media/PNG_20161017_134748.pngD/UtilitIEs: orIEntBitmap file exists : trueW/ExifInterface: InvalID image.    java.io.IOException: InvalID marker: 89           at androID.media.ExifInterface.getJpegAttributes(ExifInterface.java:1600)           at androID.media.ExifInterface.loadAttributes(ExifInterface.java:1339)           at androID.media.ExifInterface.<init>(ExifInterface.java:1057)           at com.mypackage.helpers.UtilitIEs.orIEntBitmap(UtilitIEs.java:85)           at com.mypackage.fileio.fileTools.cachethumbnail(fileTools.java:700)           at com.mypackage.coreAPI.DownloadfileClass$downloadAndSavefile(DownloadfileClass.java:215)           at com.mypackage.coreAPI.DownloadfileClass$downloadAndSavefile(DownloadfileClass.java:113)           at androID.os.AsyncTask.call(AsyncTask.java:295)           at java.util.concurrent.FutureTask.run(FutureTask.java:237)           at androID.os.AsyncTask$SerialExecutor.run(AsyncTask.java:234)           at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)           at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)           at java.lang.Thread.run(Thread.java:818)D/UtilitIEs: After exceptionD/UtilitIEs: Thumb orIEntation : 0D/fileTools: Save file to : /data/user/0/com.mypackage.myapp/cache/userhash/79640/media/PNG_20161017_134748.pngD/EncryptedfileTools: ......Final saved file path...... : /data/user/0/com.mypackage.myapp/cache/userhash/79640/media/encryptPlaceHolder

令人困惑的部分是,当我使用AndroID 4.4.4在我的Samsung galaxy S4上运行应用程序时,我没有得到这个例外,但是当我在带有androID 6.0.1的Samsung galaxy S5上运行它时,我总是得到它.我也在使用AndroID 7.0的模拟器上出现此错误.我不知道如何解决这个问题.

请参阅附加的权限屏幕截图.
Enabled Permissions

我已添加了所需的信息.如果需要更多信息,请告诉我.我之前没有使用过ExifTags所以请耐心等待.
再次感谢.

解决方法:

我发现上面的代码存在问题.显然我试图直接从mp4和png文件中读取EXIF标签.在搜索有关EXIF标签的更多信息后,我发现EXIF标签仅适用于JPEG文件.因此我的问题的解决方法是首先创建mp4 / png文件的JPEG图像,然后尝试从此JPEF文件中读取EXIF标记.这样做解决了问题,我不再得到例外.

感谢大家指导我解决方案.

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