关于android4.0.4中彩蛋的实现

情况：
在android4.0.4的系统设置-关于手机-Android版本，连续快速点击几下，就会出现一个机器人，长按住机器人不放，机器人会一直变大，然后出现一堆机器从屏幕上飞过

觉得有点意思，于是想看看是怎么实现的，电脑上有android4.0的代码。
系统设置-关于手机的代码：
packages/apps/Settings/src/com/android/settings/DeviceInfoSettings.java
其中，点击选项的处理如下：
long[] mHits = new long[3];
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
    if (preference.getKey().equals(KEY_FIRMWARE_VERSION)) {
        System.arraycopy(mHits, 1, mHits, 0, mHits.length-1);
        mHits[mHits.length-1] = SystemClock.uptimeMillis();
        if (mHits[0] >= (SystemClock.uptimeMillis()-500)) {
            Intent intent = new Intent(Intent.ACTION_MAIN);
            intent.setClassName("android",
                    com.android.internal.app.PlatLogoActivity.class.getName());
            try {
                startActivity(intent);
            } catch (Exception e) {
                Log.e(LOG_TAG, "Unable to start activity " + intent.toString());
            }
        }
    }
    return super.onPreferenceTreeClick(preferenceScreen, preference);
}
这里可以看到对固件版本选项有特殊处理：
if (preference.getKey().equals(KEY_FIRMWARE_VERSION)) {
    //如果点击的是固件版本，则记录下最近三次点击的时间；
    //如果三次点击的总时间少于500ms，则启动com.android.internal.app.PlatLogoActivity
}

再看PlatLogoActivity的实现：
public class PlatLogoActivity extends Activity {
    Toast mToast;
    ImageView mContent;
    Vibrator mZzz = new Vibrator();
    int mCount;
    final Handler mHandler = new Handler();

    Runnable mSuperLongPress = new Runnable() {
        public void run() {
            mCount++;
            mZzz.vibrate(50 * mCount);
            final float scale = 1f + 0.25f * mCount * mCount;
            mContent.setScaleX(scale);
            mContent.setScaleY(scale);

            if (mCount <= 3) {
                mHandler.postDelayed(mSuperLongPress, ViewConfiguration.getLongPressTimeout());
            } else {
                try {
                    startActivity(new Intent(Intent.ACTION_MAIN)
                        .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
                            | Intent.FLAG_ACTIVITY_CLEAR_TASK
                            | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS)
                        .setClassName("com.android.systemui","com.android.systemui.Nyandroid"));
                } catch (ActivityNotFoundException ex) {
                    android.util.Log.e("PlatLogoActivity", "Couldn't find platlogo screensaver.");
                }
                finish();
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mToast = Toast.makeText(this, "Android 4.0: Ice Cream Sandwich", Toast.LENGTH_SHORT);

        mContent = new ImageView(this);
        mContent.setImageResource(com.android.internal.R.drawable.platlogo);
        mContent.setScaleType(ImageView.ScaleType.CENTER_INSIDE);

        mContent.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                final int action = event.getAction();
                if (action == MotionEvent.ACTION_DOWN) {
                    mContent.setPressed(true);
                    mHandler.removeCallbacks(mSuperLongPress);
                    mCount = 0;
                    m

补充：移动开发 , Android ,