android - 从通知打开文件

Question

我从服务器下载一个文件。对于此操作，我显示了一个进度不确定的通知。下载文件时，我想通过单击通知打开它。

我得到扩展并尝试像这样用 intent 打开它

public static Intent openFile(Context context, File file) {
    String fileName = file.getName();

    String extension = fileName.substring(fileName.lastIndexOf(".") + 1);


    String type = "application/" + extension;

    if (getAttachmentType(fileName) == AttachmentType.IMAGE) {
        type = "image/*";
    } else if (getAttachmentType(fileName) == AttachmentType.AUDIO) {
        type = "audio/*";
    } else if (getAttachmentType(fileName) == AttachmentType.VIDEO) {
        type = "video/*";
    } else if (getAttachmentType(fileName) == AttachmentType.WORD) {
        type = "application/msword";
    } else if (getAttachmentType(fileName) == AttachmentType.EXCEL) {
        type = "application/vnd.ms-excel";
    } else if (getAttachmentType(fileName) == AttachmentType.POWERPOINT) {
        type = "application/vnd.ms-powerpoint";
    } else if (getAttachmentType(fileName) == AttachmentType.TXT) {
        type = "text/*";
    }

    Uri path = Uri.fromFile(file);
    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    Intent chooser = Intent.createChooser(intent, context.getResources().getString(R.string.open_file_with));
    intent.setDataAndType(path, type);
    return chooser;
}

然后在通知上执行此操作

Intent intent = ActionsHelper.openFile(context, file);
if (intent != null) {
     PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
      mBuilder.setContentIntent(pendingIntent);
}

我的问题是，对于任何扩展，选择器上的消息都是没有应用可以执行此操作。我错过了什么吗？

Answer 1

好的，我找到了。我替换

PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);

与

PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);

成功了