我正在尝试使用Python将网络摄像头图像发送到浏览器.现在,我使用以下代码发送它:
def send_a_frame():
capture = cv2.VideoCapture(0)
frame = capture.read()[1]
cv2.imwrite("im1.png",frame)
cnt = open("im1.png","rb").read()
b64 = base64.encodestring(cnt)
html = "<html><img src='data:image/png;base64,"+base64 +"'></html"
send(html)
如何保存图像并重新打开图像并使用单个语句转换为base64？
我正在尝试使用辅助功能服务来检测键盘是否处于活动状态(我的应用程序之外).为此,我试图阅读通知"选择键盘"(当启用多个键盘时).使用以下代码.
public class KeyboardWatcher extends AccessibilityService {
boolean isConnected = false;
@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
if (event.getEventType() == AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED) {
final String packagename = String.valueOf(event.getPackageName());
Log.d("Package", packagename);
String msg = "";
List<CharSequence> s = event.getText();
if(s.iterator().hasNext())
{
msg += s.iterator().next().toString();
Log.d("MSG", msg);
}else{
Log.d("TYPE", event.getEventType()+"");
}
}else{
Log.d("EVENT TYPE__",event.getEventType()+"");
final String packagename = String.valueOf(event.getPackageName());
Log.d("PNE", packagename);
}
}
protected void onServiceConnected() {
if (isConnected) {
return;
}
AccessibilityServiceInfo info = new AccessibilityServiceInfo();
info.eventTypes = AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED;
info.feedbackType = AccessibilityServiceInfo.FEEDBACK_ALL_MASK; …