This would create a custom vibrate pattern.

VibratePattern.java

private void customVibratePatternNoRepeat() {
    // 0 : Start without a delay
    // 400 : Vibrate for 400 milliseconds
    // 200 : Pause for 200 milliseconds
    // 400 : Vibrate for 400 milliseconds
    long[] mVibratePattern = new long[]{0, 400, 200, 400};

    // -1 : Do not repeat this pattern
    // pass 0 if you want to repeat this pattern from 0th index
    vibrator.vibrate(mVibratePattern, -1);
}