Format date string 2021-06-13T15:00:00.000Z to how many hours remaining

Question

I am receiving date string 2021-06-13T15:00:00.000Z from rest api call. I have to parse this date string that match will start in 5 hours or today

Answer 1

You can try something like below.

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.getDefault());
    LocalDateTime eventDate = LocalDateTime.parse("2021-06-15T21:00:00.000Z", formatter);
    LocalDateTime now = LocalDateTime.now();
    Duration dur = Duration.between(now, eventDate);
    if (dur.isNegative()) {
        Log.d("DINKAR", "Time Already Passed");
    } else if (dur.isZero()) {
        Log.d("DINKAR", "Its happening now");
    } else {
        if (dur.getSeconds() > 0 && dur.getSeconds() < 60) {
            Log.d("DINKAR", String.format("Match will start in %d seconds", dur.getSeconds()));
        } else if (dur.toMinutes() > 0 && dur.toMinutes() < 60) {
            Log.d("DINKAR", String.format("Match will start in %d minutes", dur.toMinutes()));
        } else if (dur.toHours() > 0 && dur.toHours() < 24) {
            Log.d("DINKAR", String.format("Match will start in %d hours", dur.toHours()));
        } else if (dur.toDays() > 0) {
            Log.d("DINKAR", String.format("Match will start in %d days", dur.toDays()));
        }
    }

For API below 26 Please also add the following in your build.gradle

android {
defaultConfig {
    // Required when setting minSdkVersion to 20 or lower
    multiDexEnabled = true
}

compileOptions {
    // Flag to enable support for the new language APIs
    coreLibraryDesugaringEnabled = true
    // Sets Java compatibility to Java 8
    sourceCompatibility = JavaVersion.VERSION_1_8
    targetCompatibility = JavaVersion.VERSION_1_8
}
}

dependencies {
    coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:1.1.5")
}