Question

有人可以告诉我为什么这段代码不再将照片保存到画廊了？我让它在某个时刻工作，然后我改变了其他地方的东西，现在这不起作用。

private void openImageIntent() {

    // Determine Uri of camera image to save.
    final File storageDir = Environment
            .getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
    final String fname = ClassName.getUniqueImageFilename();
    final File sdImageMainDirectory = new File(storageDir, fname);
    outputFileUri = Uri.fromFile(sdImageMainDirectory);

    // Camera.
    final List<Intent> cameraIntents = new ArrayList<Intent>();
    final Intent captureIntent = new Intent(
            android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    final PackageManager packageManager = getPackageManager();
    final List<ResolveInfo> listCam = packageManager.queryIntentActivities(
            captureIntent, 0);
    for (ResolveInfo res : listCam) {
        final String packageName = res.activityInfo.packageName;
        final Intent intent = new Intent(captureIntent);
        intent.setComponent(new ComponentName(res.activityInfo.packageName,
                res.activityInfo.name));
        intent.setPackage(packageName);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
        cameraIntents.add(intent);
    }

    // Filesystem.
    final Intent galleryIntent = new Intent();
    galleryIntent.setType("image/*");
    galleryIntent.setAction(Intent.ACTION_GET_CONTENT);

    // Chooser of filesystem options.
    final Intent chooserIntent = Intent.createChooser(galleryIntent,
            "Chose a source");

    // Add the camera options.
    chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS,
            cameraIntents.toArray(new Parcelable[] {}));

    startActivityForResult(chooserIntent, REQUEST_IMAGE_CAPTURE);
}

private static String getUniqueImageFilename() {
    // TODO Auto-generated method stub
    String fileName = "img_" + System.currentTimeMillis() + ".jpg";
    return fileName;
}

这是我得到的错误：

10-29 23:53:50.692: E/BitmapFactory(12547): Unable to decode stream: java.io.FileNotFoundException: /file:/storage/emulated/0/DCIM/img_1414623222659.jpg: open failed: ENOENT (No such file or directory)
10-29 23:53:50.692: E/BitmapFactory(12547): Unable to decode stream: java.io.FileNotFoundException: /file:/storage/emulated/0/DCIM/img_1414623222659.jpg: open failed: ENOENT (No such file or directory)

Answer 1

final File storageDir = Environment
            .getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);

您应该在Android Manifest中添加权限以写入外部存储

Android存储分为不同版本的Android SDK。您的代码可以在某些设备上运行，但不是全部。

由于缺少权限，系统无法在系统上创建文件，因此它会给您错误。我找到的最好的方法就是看看如果安装了外部存储器，那么在外部创建一个文件。

以下两个代码片段都可以使用。

Environment.getExternalStorageDirectory() + "/" + "myImages" + "/someimage.jpg";

之后，您可以启动Media Store更新Intent以更新Android Gallery。

或使用此代码

final File dir = new File(context.getFilesDir() + "/nfs/guille/groce/users/nicholsk/workspace3/SQLTest");
dir.mkdirs(); //create folders where write files
final File file = new File(dir, "BlockForTest.txt");

相机不保存图像

1 个答案: