android.support.v4.app.ActivityCompat#postponeEnterTransition ( )源码实例Demo

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

    setupLayoutStableFullscreen();

    restoreState(savedInstanceState);

    if (!shouldUseDataBinding()) {
        // set contentView if child activity not use dataBinding
        setContentView(getLayout());
        initViews();
    }

    if (shouldPostponeTransition()) {
        ActivityCompat.postponeEnterTransition(this);
    }

    CommonUtils.hideSoftKeyboard(this);
}
 

@Override public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  // See setupViewPager() below for why this exists
  ActivityCompat.postponeEnterTransition(this);
  AnimationUtil.setupActivityTransition(this);
  setContentView(R.layout.app_bar_team_details);
  ButterKnife.bind(this);
  setSupportActionBar(toolbar);

  if (savedInstanceState == null) {
    club = getIntent().getParcelableExtra(EXTRA_CLUB);
    nation = userPreferences.nation();
    league = userPreferences.league();
  }

  ActionBar actionBar = checkNotNull(getSupportActionBar());
  actionBar.setDisplayShowHomeEnabled(true);
  actionBar.setDisplayHomeAsUpEnabled(true);
  actionBar.setTitle(club.shortName());
  setupViewPager();
}
 

void setSharedElementEnterTransition(Activity activity, String sharedElementName,
        long timeoutMs) {
    if (activity == null && !TextUtils.isEmpty(sharedElementName) ||
            activity != null && TextUtils.isEmpty(sharedElementName)) {
        throw new IllegalArgumentException();
    }
    if (activity == mActivityToRunTransition &&
            TextUtils.equals(sharedElementName, mSharedElementName)) {
        return;
    }
    if (mActivityToRunTransition != null) {
        ActivityCompat.setEnterSharedElementCallback(mActivityToRunTransition, null);
    }
    mActivityToRunTransition = activity;
    mSharedElementName = sharedElementName;
    if (DEBUG) {
        Log.d(TAG, "postponeEnterTransition " + mActivityToRunTransition);
    }
    ActivityCompat.setEnterSharedElementCallback(mActivityToRunTransition, this);
    ActivityCompat.postponeEnterTransition(mActivityToRunTransition);
    if (timeoutMs > 0) {
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                if (mStartedPostpone) {
                    return;
                }
                if (DEBUG) {
                    Log.d(TAG, "timeout " + mActivityToRunTransition);
                }
                startPostponedEnterTransition();
            }
        }, timeoutMs);
    }
}