How to change screen timeout programmatically?

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It is simple to do.. You should learn to solve your problem from Android source code.

  /**
   * set screen off timeout
   * @param screenOffTimeout int 0~6
   */
private void setTimeout(int screenOffTimeout) {
    int time;
    switch (screenOffTimeout) {
    case 0:
        time = 15000;
        break;
    case 1:
        time = 30000;
        break;
    case 2:
        time = 60000;
        break;
    case 3:
        time = 120000;
        break;
    case 4:
        time = 600000;
        break;
    case 5:
        time = 1800000;
        break;
    default:
        time = -1;
    }
    android.provider.Settings.System.putInt(getContentResolver(),
            Settings.System.SCREEN_OFF_TIMEOUT, time);
}

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