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我近几年编程到Android,我想知道:如何检测用户何时截屏？我希望当用户截取屏幕截图时,我们会转到下一个活动.我尝试了拦截事件的方法,但是存在一个问题:例如,当设备进入休眠状态时,拦截了一个事件.您是否有拦截仅截取事件或忽略其他事件的解决方案？

谢谢您的帮助 !

我正在尝试从我的Environment.getExternalStorageDirectory()加载屏幕截图并尝试将其转换为位图

 public void onPictureTaken(String path) throws IOException {

    String photoPath = filepath + "/" + path;; //UPDATE WITH YOUR OWN JPG FILE

    File directory = new File (filepath);
    File file = new File(directory, path);

    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(photoPath, options);

    // Calculate inSampleSize
    options.inSampleSize = 4;
    options.inJustDecodeBounds = false;
    BitmapFactory.decodeFile(photoPath, options);

}

--- SkImageDecoder :: Factory返回null

这是我调用onPictureTaken的函数:

 private void observeSceenshot(){
    filepath = Environment.getExternalStorageDirectory()
            + File.separator + Environment.DIRECTORY_PICTURES
            + File.separator + "Screenshots";
    Log.d(TAG, filepath);

    FileObserver fileObserver …

在我的Android应用程序中,我想检测目录中的事件.这是代码:

String path = Environment.getExternalStorageDirectory()
            + File.separator + "test2";
    Log.d("test", "path is " + path);

    FileObserver fileObserver = new FileObserver(path, FileObserver.ALL_EVENTS) {
        @Override
        public void onEvent(int event, String path) {
            Log.d("test", "event dectect " + event + " " + path);
        }
    };

    fileObserver.startWatching();

我将新文件复制到该目录.但我没有得到任何事件.请告诉我我犯了什么错误.