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How to create our own Listener interface in android?
... any parameter as per your requirement
public void callback(View view, String result);
}
In your activity, implement the interface:
MyActivity.java:
public class MyActivity extends Activity implements MyListener {
@override
public void onCreate(){
MyButton m = new MyBut...
How to check if a string is a valid hex color representation?
...// regular function
function isHexColor (hex) {
return typeof hex === 'string'
&& hex.length === 6
&& !isNaN(Number('0x' + hex))
}
// or as arrow function (ES6+)
isHexColor = hex => typeof hex === 'string' && hex.length === 6 && !isNaN(Number...
How can I trim leading and trailing white space?
...read.table you can set the parameterstrip.white=TRUE.
If you want to clean strings afterwards you could use one of these functions:
# Returns string without leading white space
trim.leading <- function (x) sub("^\\s+", "", x)
# Returns string without trailing white space
trim.trailing <- fun...
Why does this assert throw a format exception when comparing structures?
... got it. And yes, it's a bug.
The problem is that there are two levels of string.Format going on here.
The first level of formatting is something like:
string template = string.Format("Expected: {0}; Actual: {1}; Message: {2}",
expected, actual, message);
Then ...
How can I calculate the difference between two dates?
...
NSDate *date1 = [NSDate dateWithString:@"2010-01-01 00:00:00 +0000"];
NSDate *date2 = [NSDate dateWithString:@"2010-02-03 00:00:00 +0000"];
NSTimeInterval secondsBetween = [date2 timeIntervalSinceDate:date1];
int numberOfDays = secondsBetween / 86400;
NS...
Email Address Validation in Android on EditText [duplicate]
...Message);
final TextView textView = (TextView)findViewById(R.id.text);
String email = emailValidate.getText().toString().trim();
String emailPattern = "[a-zA-Z0-9._-]+@[a-z]+\\.+[a-z]+";
emailValidate .addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
...
Single vs Double quotes (' vs ")
...th double quotes "you can insert variables directly within the text of the string". (scriptingok.com) And when using single quotes "the text appears as it is". (scriptingok.com)
PHP takes longer to process double quoted strings. Since the PHP parser has to read the whole string in advance to det...
How can I get device ID for Admob
...ebugEnabled(this)) //debug flag from somewhere that you set
{
String android_id = Settings.Secure.getString(this.getContentResolver(), Settings.Secure.ANDROID_ID);
String deviceId = md5(android_id).toUpperCase();
mAdRequest.addTestDevice(deviceId);
boolean isTest...
Android List Preferences: have summary as selected value?
... android:defaultValue="0" />
Android will replace %s with the current string value of the preference, as displayed by the ListPreference's picker. The list's summary will also be set correctly when you enter the activity—you don't have to write any special code to set it up initially.
This ...
Create array of regex matches
... java.util.regex.Matcher;
import java.util.regex.Pattern;
...
List<String> allMatches = new ArrayList<String>();
Matcher m = Pattern.compile("your regular expression here")
.matcher(yourStringHere);
while (m.find()) {
allMatches.add(m.group());
}
After this, allMatches ...