Question

我无法捕获图像并将其保存到Google Glass上的外部存储空间。我有以下代码。

    Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE, null);

    String imagePath = getPhotoPath();

    _imagePath = imagePath;
    File imageFile = new File(_imagePath);

    Uri imageUri = Uri.fromFile(imageFile);
    cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);

    startActivityForResult(cameraIntent, ACTION_CAPTURE_IMAGE);

getPhotoPath（）的代码

    private String getPhotoPath(){

    String photoPath = null;

    String state = Environment.getExternalStorageState();

    if (Environment.MEDIA_MOUNTED.equals(state)) {

        long captureTime = System.currentTimeMillis();

        photoPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/TOTAL_" + captureTime + ".jpg";
    }       

    return photoPath;
}

我已经验证_imagePath不是null但是当我尝试在onActivityResult（）中执行以下操作时

    File imageFile = new File(_imagePath);

    if(!imageFile.exists()){
    Log.d(LOG_TAG, "sendPhoto: FILE DOES NOT EXIST, imagePath=" + _imagePath);
    }

该文件不存在。我可以通过查看Eclipse中Google Glass设备的文件资源管理器来验证它是否存在于存储中。

我在项目的清单中有WRITE_EXTERNAL_STORAGE权限，但仍有一些问题。

可能相关的logcat消息：

01-06 16:28:15.067: E/CachedFilesManager(634): Failed to change mode on file /mnt/sdcard/thumbnail_cache/t_thumb_20140106_162814_113.jpg
01-06 16:28:15.067: E/CachedFilesManager(634): java.io.IOException: Operation not permitted
01-06 16:28:15.067: E/CachedFilesManager(634):  at com.google.glass.fs.Filesystem.changeMode(Native Method)
01-06 16:28:15.067: E/CachedFilesManager(634):  at com.google.glass.util.CachedFilesManager.save(CachedFilesManager.java:433)
01-06 16:28:15.067: E/CachedFilesManager(634):  at com.google.glass.camera.CameraUtils.saveThumbnailToCachedFiles(CameraUtils.java:76)
01-06 16:28:15.067: E/CachedFilesManager(634):  at com.google.glass.camera.ApiTakePictureActivity$1.doInBackground(ApiTakePictureActivity.java:110)
01-06 16:28:15.067: E/CachedFilesManager(634):  at com.google.glass.camera.ApiTakePictureActivity$1.doInBackground(ApiTakePictureActivity.java:105)
01-06 16:28:15.067: E/CachedFilesManager(634):  at android.os.AsyncTask$2.call(AsyncTask.java:273)
01-06 16:28:15.067: E/CachedFilesManager(634):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
01-06 16:28:15.067: E/CachedFilesManager(634):  at java.util.concurrent.FutureTask.run(FutureTask.java:137)
01-06 16:28:15.067: E/CachedFilesManager(634):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
01-06 16:28:15.067: E/CachedFilesManager(634):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
01-06 16:28:15.067: E/CachedFilesManager(634):  at java.lang.Thread.run(Thread.java:856)

知道发生了什么事吗？写入Glass存储是不允许的？似乎不太可能，但我不知道发生了什么。

Answer 1

Glass不支持EXTRA_OUTPUT intent额外指定最终图像文件的路径。相反，请参阅GDK Camera Developer Guide中的示例，了解如何检索已保存图像文件的路径，并使用FileObserver等待将其写出。

无法在Google Glass上捕获图像

1 个答案: