how to prevent execution of same thing again and again-CodePudding

I have made an application that whenever a user types a particular word it toast a massage now I want to add a feature that if the user has typed the particular word continuously many times in a particular time it will consider it once only and toast the massage ones only.

The code

if ( string.equals("help") ) {
    Toast.makeText(getApplicationContext(), "we are here to help", Toast.LENGTH_SHORT).show();
}

CodePudding user response：

Use a global String variable let's name it as lastText and check whether input text is the same as last text.

UPDATE for time tracking

private String lastText = ""; // Global for all class members
private long lastTextTime = 0; // Global
//...
// May be more code goes here
//...
if ( string.equals("help") && !string.equals(lastText) ) {
    // Check whether 5 min has elapsed to show the toast message
    if(System.currentTimeMillis - lastTextTime > (5*60*1000)) {
        Toast.makeText(getApplicationContext(), "we are here to help", 
            Toast.LENGTH_SHORT).show();
        // If the program reach here save this string as a last text for the next check
        lastText = string;
        lastTextTime = System.currentTimeMillis;
    }
}

CodePudding user response：

You can add already typed words to a list, and when the user types a word, you can iterate through this list and check if "word" is already was typed, and then if "false" - show toast.

Alternative solution - you can create a local SQLite database (using Room persistence library), it will allow you to save values even if user restart/exit app, but it will require more coding and fixing nuances