android.view.View.OnSystemUiVisibilityChangeListener#android.support.v4.view.ViewPager.SimpleOnPageChangeListener源码实例Demo

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

    if (MizLib.hasKitKat()) {
        setTheme(R.style.Mizuu_Theme_Translucent_FullScreen);
    } else {
        setTheme(R.style.Mizuu_Theme_Transparent_FullScreen);
    }

    ViewUtils.setupWindowFlagsForStatusbarOverlay(getWindow(), true);

    mToolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(mToolbar);

    ViewUtils.setProperToolbarSize(this, mToolbar);

    getSupportActionBar().setBackgroundDrawable(getResources().getDrawable(R.drawable.transparent_actionbar));

    mBus = MizuuApplication.getBus();

    mPortraitPhotos = getIntent().getBooleanExtra("portraitPhotos", true);
    mPhotos = getIntent().getStringArrayExtra("photos");

    getSupportActionBar().setTitle((getIntent().getIntExtra("selectedIndex", 0) + 1) + " " + getString(R.string.of) + " " + mPhotos.length);

    mViewPager = (ViewPager) findViewById(R.id.awesomepager);
    mViewPager.setPageMargin(MizLib.convertDpToPixels(getApplicationContext(), 16));
    mViewPager.setAdapter(new ActorPhotosAdapter(getSupportFragmentManager()));
    mViewPager.setOnPageChangeListener(new SimpleOnPageChangeListener() {
        @Override
        public void onPageSelected(int arg0) {
            getSupportActionBar().setTitle((arg0 + 1) + " " + getString(R.string.of) + " " + mPhotos.length);
        }

    });
    mViewPager.setCurrentItem(getIntent().getIntExtra("selectedIndex", 0));

    View decorView = getWindow().getDecorView();
    decorView.setOnSystemUiVisibilityChangeListener(new OnSystemUiVisibilityChangeListener() {
        @Override
        public void onSystemUiVisibilityChange(int visibility) {
            if (visibility == 0) {
                // The UI is visible due to user interaction - let's hide it again after three seconds
                mHandler.postDelayed(mHideSystemUiRunnable, 3000);
            }
        }
    });
}