How to check if a value is a double value in Android (Java)

August 4, 2016

To check if a value is a double value in Android you can use the snippet below.

Samples

Java (Android) Sample

public static boolean IsDoubleValue(String input) {
	if(!TextUtils.isEmpty(input.trim())) { //use <em>if(!input.trim().toString().equals("")) {</em> if you are not on the Android platform
		String regExp = "[\\x00-\\x20]*[+-]?(((((\\p{Digit}+)(\\.)?((\\p{Digit}+)?)([eE][+-]?(\\p{Digit}+))?)|(\\.((\\p{Digit}+))([eE][+-]?(\\p{Digit}+))?)|(((0[xX](\\p{XDigit}+)(\\.)?)|(0[xX](\\p{XDigit}+)?(\\.)(\\p{XDigit}+)))[pP][+-]?(\\p{Digit}+)))[fFdD]?))[\\x00-\\x20]*";
		return input.matches(regExp);
	}else{
		return false;
	}
}

public static boolean IsDoubleValue(String input) {

if(!TextUtils.isEmpty(input.trim())) { //use <em>if(!input.trim().toString().equals("")) {</em> if you are not on the Android platform

String regExp = "[\\x00-\\x20]*[+-]?(((((\\p{Digit}+)(\\.)?((\\p{Digit}+)?)([eE][+-]?(\\p{Digit}+))?)|(\\.((\\p{Digit}+))([eE][+-]?(\\p{Digit}+))?)|(((0[xX](\\p{XDigit}+)(\\.)?)|(0[xX](\\p{XDigit}+)?(\\.)(\\p{XDigit}+)))[pP][+-]?(\\p{Digit}+)))[fFdD]?))[\\x00-\\x20]*";

return input.matches(regExp);

}else{

return false;

}

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How to refresh the current Android Fragment

Administrator

June 9, 2016

4 Comments

To refresh the current Android Fragment you can use the snippet below. The code must be placed inside the Fragment that needs to be updated. The snippet will call the onCreateView Method of the Fragment.

Samples

Sample Java

getFragmentManager().beginTransaction().detach(this).attach(this).commit();

1	getFragmentManager().beginTransaction().detach(this).attach(this).commit();

If you have any questions or suggestions feel free to rate this snippet, post a comment or Contact Us via Email.

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To show software keyboard when focusing textedit in Android you can use the snippet below.

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Sample Java

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To convert a string to enum in Java you can use the following snippet.

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Sample Java

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Sample Java

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Sample Java

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To iterate throug a map in Java you can use the snippet below.

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To check if one one string contains another string in Javascript you can use the following method.

Sample JS

if(testString.indexOf("substring") > -1){
}

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To read a file to string in Java you can use the following snippet.

Sample Java

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How to check if a value is a double value in Android (Java)

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