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MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...create list
"greenhouse/status/system",
"greenhouse/status/alerts",
"greenhouse/status/device_status"
2. 连接管理与重连机制
// 智能连接管理
when Screen1.Initialize
do
set MaxRetryCount to 5
set CurrentRetry to 0
set Reconne...
How to disable / enable dialog negative positive buttons?
...
Edit for complete solution...
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setIcon(android.R.drawable.ic_dialog_info);
builder.setTitle("Alert dialog title");
builder.setMessage("This is the example code snippet to dis...
Get class name using jQuery
...$('.myclass.mysubclass')
Update 2018
OR can be implemented with vanilla javascript in 2 lines:
const { classList } = document.querySelector('#id');
document.querySelectorAll(`.${Array.from(classList).join('.')}`);
...
How can I change the current URL?
I have the following code that changes the pages from within JavaScript:
5 Answers
5
...
How can I change the color of AlertDialog title and the color of the line under it
I changed the color of an AlertDialog title using this command
14 Answers
14
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How to implement a custom AlertDialog View
In the Android docs on AlertDialog , it gives the following instruction and example for setting a custom view in an AlertDialog:
...
Bootstrap 3 jquery event for active tab change
...unction (e) {
var target = $(e.target).attr("href") // activated tab
alert(target);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>...
What does it mean when an HTTP request returns status code 0?
What does it mean when JavaScript network calls such as fetch or XMLHttpRequest, or any other type of HTTP network request, fail with an HTTP status code of 0?
...
How to show a dialog to confirm that the user wishes to exit an Android Activity?
....0+ this would look like:
@Override
public void onBackPressed() {
new AlertDialog.Builder(this)
.setIcon(android.R.drawable.ic_dialog_alert)
.setTitle("Closing Activity")
.setMessage("Are you sure you want to close this activity?")
.setPositiveButton("Yes", new D...
jQuery: more than one handler for same event
...nts in sequence, e.g.:
$('#target')
.bind('click',function(event) {
alert('Hello!');
})
.bind('click',function(event) {
alert('Hello again!');
})
.bind('click',function(event) {
alert('Hello yet again!');
});
I guess the below code is doing the same
$('#target')
.cl...