下面列出了android.support.v4.app.FragmentManager#getFragment ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
@Override
protected void onCreate(Bundle savedInstanceState) {
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_container);
FragmentManager fm = getSupportFragmentManager();
Fragment fragment = null;
if (savedInstanceState != null) {
fragment = fm.getFragment(savedInstanceState, FRAGMENT_TAG);
}
if (fragment == null) {
fragment = initFromIntent(getIntent());
}
FragmentTransaction trans = getSupportFragmentManager()
.beginTransaction();
trans.replace(R.id.content, fragment);
trans.commitAllowingStateLoss();
mFragment = new WeakReference<>(fragment);
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState!=null){
FragmentManager fragmentManager = getChildFragmentManager();
articlesFragment = (ArticlesFragment) fragmentManager.getFragment(savedInstanceState, ArticlesFragment.class.getSimpleName());
favoritesFragment = (FavoritesFragment) fragmentManager.getFragment(savedInstanceState, FavoritesFragment.class.getSimpleName());
readLaterFragment = (ReadLaterFragment) fragmentManager.getFragment(savedInstanceState, ReadLaterFragment.class.getSimpleName());
}else {
articlesFragment = ArticlesFragment.newInstance();
favoritesFragment = FavoritesFragment.newInstance();
readLaterFragment = ReadLaterFragment.newInstance();
}
new ArticlesPresenter(articlesFragment,
ArticlesDataRepository.getInstance(ArticlesDataRemoteSource.getInstance()),
BannerDataRepository.getInstance(BannerDataRemoteSource.getInstance()),
LoginDataRepository.getInstance(LoginDataLocalSource.getInstance(), LoginDataRemoteSource.getInstance()));
new FavoritesPresenter(favoritesFragment,
FavoriteArticlesDataRepository.getInstance(FavoriteArticlesDataRemoteSource.getInstance(),
FavoriteArticlesDataLocalSource.getInstance()));
new ReadLaterPresenter(readLaterFragment,
ReadLaterArticlesDataRepository.getInstance(ReadLaterArticlesLocalSource.getInstance()));
}
private void restoreFragments(Bundle savedInstanceState) {
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
if (savedInstanceState != null) {
profileFragment = (ProfileFragment)manager.getFragment(savedInstanceState, ProfileFragment.TAG);
settingsFragment = (SettingsFragment)manager.getFragment(savedInstanceState, SettingsFragment.TAG);
}
if (profileFragment == null) {
profileFragment = new ProfileFragment();
transaction.add(R.id.fragmentContainer, profileFragment, ProfileFragment.TAG);
}
if (settingsFragment == null) {
settingsFragment = new SettingsFragment();
transaction.add(R.id.fragmentContainer, settingsFragment, SettingsFragment.TAG);
}
transaction.commit();
}
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.container);
if (PreferenceManager.getDefaultSharedPreferences(this).getBoolean("navigation_bar_tint", true)) {
getWindow().setNavigationBarColor(ContextCompat.getColor(this,R.color.colorPrimaryDark));
}
if (savedInstanceState != null) {
FragmentManager manager = getSupportFragmentManager();
loginFragment = (LoginFragment) manager.getFragment(savedInstanceState, LoginFragment.class.getSimpleName());
signUpFragment = (SignUpFragment) manager.getFragment(savedInstanceState, LoginFragment.class.getSimpleName());
}else {
loginFragment = LoginFragment.newInstance();
signUpFragment = SignUpFragment.newInstance();
}
if (!loginFragment.isAdded()){
getSupportFragmentManager().beginTransaction()
.add(R.id.view_pager, loginFragment, LoginFragment.class.getSimpleName())
.commit();
}
if (!signUpFragment.isAdded()){
getSupportFragmentManager().beginTransaction()
.add(R.id.view_pager, signUpFragment, SignUpFragment.class.getSimpleName())
.commit();
}
new LoginPresenter(loginFragment, LoginDataRepository.getInstance(
LoginDataLocalSource.getInstance(),
LoginDataRemoteSource.getInstance()
), ReadLaterArticlesDataRepository.getInstance(ReadLaterArticlesLocalSource.getInstance()));
new LoginPresenter(signUpFragment, LoginDataRepository.getInstance(
LoginDataLocalSource.getInstance(),
LoginDataRemoteSource.getInstance()
), ReadLaterArticlesDataRepository.getInstance(ReadLaterArticlesLocalSource.getInstance()));
showLoginFragment();
}
private void initFragments(Bundle savedInstanceState) {
FragmentManager fragmentManager = getSupportFragmentManager();
if (savedInstanceState != null) {
mTimelineFragment = (TimelineFragment) fragmentManager.getFragment(savedInstanceState, TimelineFragment.class.getSimpleName());
mCategoriesFragment = (CategoriesFragment) fragmentManager.getFragment(savedInstanceState, CategoriesFragment.class.getSimpleName());
mAboutFragment = (AboutFragment) fragmentManager.getFragment(savedInstanceState, AboutFragment.class.getSimpleName());
} else {
mTimelineFragment = TimelineFragment.newInstance();
mCategoriesFragment = CategoriesFragment.newInstance();
mAboutFragment = AboutFragment.newInstance();
}
if (!mTimelineFragment.isAdded()) {
fragmentManager.beginTransaction()
.add(R.id.frame_layout, mTimelineFragment, TimelineFragment.class.getSimpleName())
.commit();
}
if (!mCategoriesFragment.isAdded()) {
fragmentManager.beginTransaction()
.add(R.id.frame_layout, mCategoriesFragment, CategoriesFragment.class.getSimpleName())
.commit();
}
if (!mAboutFragment.isAdded()) {
fragmentManager.beginTransaction()
.add(R.id.frame_layout, mAboutFragment, AboutFragment.class.getSimpleName())
.commit();
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager fragmentManager = getSupportFragmentManager();
if (savedInstanceState != null) {
one = (PageFragment) fragmentManager.getFragment(savedInstanceState, "ONE");
two = (PageFragment) fragmentManager.getFragment(savedInstanceState, "TWO");
three = (PageFragment) fragmentManager.getFragment(savedInstanceState, "THREE");
four = (PageFragment) fragmentManager.getFragment(savedInstanceState, "FOUR");
five = (PageFragment) fragmentManager.getFragment(savedInstanceState, "FIVE");
//since survived, need to clean up or I can't add them to the pagers adapter again.
FragmentTransaction remove = fragmentManager.beginTransaction();
remove.remove(one);
remove.remove(two);
remove.remove(three);
remove.remove(four);
remove.remove(five);
if (!remove.isEmpty()) {
remove.commit();
fragmentManager.executePendingTransactions();
}
} else {
one = PageFragment.create(1);
two = PageFragment.create(2);
three = PageFragment.create(3);
four = PageFragment.create(4);
five = PageFragment.create(5);
}
viewPager = (ViewPager) findViewById(R.id.pager);
mPagerAdapter = new myFragmentPagerAdapter(5);
viewPager.setAdapter(mPagerAdapter);
//viewPager.setCurrentItem(2);
//we need to know when a page has changed, so we can change/fix the next/previous/finish buttons
viewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@SuppressLint("NewApi")
@Override
public void onPageSelected(int position) {
// When changing pages, reset the action bar actions since they are dependent
// on which page is currently active. An alternative approach is to have each
// fragment expose actions itself (rather than the activity exposing actions),
// but for simplicity, the activity provides the actions in this sample.
if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.HONEYCOMB) { //should kept this demo from force closing if run on the wrong API... I think...
//Note, if below HONEYCOMB, then no buttons, because no actionbar.
invalidateOptionsMenu();}
}
});
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager fragmentManager = getSupportFragmentManager();
if (savedInstanceState != null) {
one = (PageFragment) fragmentManager.getFragment(savedInstanceState, "ONE");
two = (PageFragment) fragmentManager.getFragment(savedInstanceState, "TWO");
three = (PageFragment) fragmentManager.getFragment(savedInstanceState, "THREE");
four = (PageFragment) fragmentManager.getFragment(savedInstanceState, "FOUR");
five = (PageFragment) fragmentManager.getFragment(savedInstanceState, "FIVE");
//since survived, need to clean up or I can't add them to the pagers adapter again.
FragmentTransaction remove = fragmentManager.beginTransaction();
remove.remove(one);
remove.remove(two);
remove.remove(three);
remove.remove(four);
remove.remove(five);
if (!remove.isEmpty()) {
remove.commit();
fragmentManager.executePendingTransactions();
}
} else {
one = PageFragment.create(1);
two = PageFragment.create(2);
three = PageFragment.create(3);
four = PageFragment.create(4);
five = PageFragment.create(5);
}
viewPager = (ViewPager) findViewById(R.id.pager);
if (viewPager != null) {
//in portrait mode
viewPager.setAdapter(new ThreeFragmentPagerAdapter(5));
} else {
//in landscape mode
viewPager1 = (ViewPager) findViewById(R.id.pagerleft);
viewPager1.setAdapter(new ThreeFragmentPagerAdapter(2));
viewPager2 = (ViewPager) findViewById(R.id.pagerright);
viewPager2.setAdapter(new ThreeFragmentPagerAdapter(3));
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//getSupportFragmentManager().beginTransaction().add(R.id.frag_container, firstFragment).commit();
//first find the 3 fragments, if create them as needed.
//Remember fragments can survive the restart of an activity on orientation change.
FragmentManager fragmentManager = getSupportFragmentManager();
if (savedInstanceState != null) {
leftfrag = (FragLeft) fragmentManager.getFragment(savedInstanceState, "LEFT");
midfrag = (FragMid) fragmentManager.getFragment(savedInstanceState,"MIDDLE");
rightfrag = (FragRight) fragmentManager.getFragment(savedInstanceState,"RIGHT");
//since survived, remove them from the fragment manager, so don't double add them.
FragmentTransaction remove = fragmentManager.beginTransaction();
remove.remove(leftfrag);
remove.remove(midfrag);
remove.remove(rightfrag);
if (!remove.isEmpty()) {
remove.commit();
fragmentManager.executePendingTransactions();
}
} else {
leftfrag = new FragLeft();
midfrag = new FragMid();
rightfrag = new FragRight();
}
viewPager = (ViewPager) findViewById(R.id.pager);
if (viewPager != null) {
//in portrait mode
viewPager.setAdapter(new ThreeFragmentPagerAdapter(fragmentManager));
} else {
//in landscape mode
fragmentManager.beginTransaction()
.add(R.id.frag_left, leftfrag, "LEFT")
.add(R.id.frag_mid, midfrag, "MIDDLE")
.add(R.id.frag_right, rightfrag, "RIGHT")
.commit();
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_actionbar);
//turn on up button
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
FragmentManager fragmentManager = getSupportFragmentManager();
if (savedInstanceState != null) {
one = (PageFragment) fragmentManager.getFragment(savedInstanceState, "ONE");
two = (PageFragment) fragmentManager.getFragment(savedInstanceState, "TWO");
three = (PageFragment) fragmentManager.getFragment(savedInstanceState, "THREE");
four = (PageFragment) fragmentManager.getFragment(savedInstanceState, "FOUR");
five = (PageFragment) fragmentManager.getFragment(savedInstanceState, "FIVE");
//since survived, need to clean up or I can't add them to the pagers adapter again.
FragmentTransaction remove = fragmentManager.beginTransaction();
remove.remove(one);
remove.remove(two);
remove.remove(three);
remove.remove(four);
remove.remove(five);
if (!remove.isEmpty()) {
remove.commit();
fragmentManager.executePendingTransactions();
}
} else {
one = PageFragment.create(1);
two = PageFragment.create(2);
three = PageFragment.create(3);
four = PageFragment.create(4);
five = PageFragment.create(5);
}
viewPager = (ViewPager) findViewById(R.id.pager);
mPagerAdapter = new myFragmentPagerAdapter(5);
viewPager.setAdapter(mPagerAdapter);
//viewPager.setCurrentItem(2);
//we need to know when a page has changed, so we can change/fix the next/previous/finish buttons
viewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
supportInvalidateOptionsMenu();
}
});
}