下面列出了怎么用android.support.v4.app.SharedElementCallback的API类实例代码及写法，或者点击链接到github查看源代码。
@TargetApi(21)
private void setCallback(final int enterPosition) {
this.enterPosition = enterPosition;
setExitSharedElementCallback(new SharedElementCallback() {
@Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
if (exitPosition != enterPosition &&
names.size() > 0 && exitPosition < sharedViews.length) {
names.clear();
sharedElements.clear();
View view = sharedViews[exitPosition];
names.add(view.getTransitionName());
sharedElements.put(view.getTransitionName(), view);
}
setExitSharedElementCallback((SharedElementCallback) null);
sharedViews = null;
}
});
}
@TargetApi(21)
private void setSharedElementCallback(final View view) {
setEnterSharedElementCallback(new SharedElementCallback() {
@Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
names.clear();
sharedElements.clear();
names.add(view.getTransitionName());
sharedElements.put(view.getTransitionName(), view);
}
});
}
private void initEnterSharedElement() {
ActivityCompat.setEnterSharedElementCallback(this, new SharedElementCallback() {
@Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
sharedElements.clear();
sharedElements.put(SHARE_IMAGE, getBinding().image);
}
});
}
private void initEnterSharedElement() {
ActivityCompat.setEnterSharedElementCallback(this, new SharedElementCallback() {
@Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
Image image = mImages[getBinding().pager.getCurrentItem()];
sharedElements.clear();
sharedElements.put(String.format("%s.image", image.url), getCurrent().getSharedElement());
}
});
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
@Override
public void initViews() {
showProgress();
realm = Realm.getDefaultInstance();
gankMeizis = realm.where(GankMeizi.class).findAll();
initRecycleView();
RxBus.getInstance().toObserverable(Intent.class)
.compose(this.bindToLifecycle())
.subscribe(intent -> {
imageIndex = intent.getIntExtra("index", -1);
scrollIndex();
finishTask();
}, throwable -> {
LogUtil.all(throwable.getMessage());
});
setEnterSharedElementCallback(new SharedElementCallback() {
@Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
super.onMapSharedElements(names, sharedElements);
String newTransitionName = gankMeizis.get(imageIndex).getUrl();
View newSharedView = mRecyclerView.findViewWithTag(newTransitionName);
if (newSharedView != null) {
names.clear();
names.add(newTransitionName);
sharedElements.clear();
sharedElements.put(newTransitionName, newSharedView);
}
}
});
}
void setEnterSharedElementCallback(final CallVoid1<SharedElementCallback> superCall,
SharedElementCallback callback) {
synchronized (mSuperListeners) {
mSuperListeners.push(superCall);
setEnterSharedElementCallback(callback);
}
}
void setExitSharedElementCallback(final CallVoid1<SharedElementCallback> superCall,
SharedElementCallback callback) {
synchronized (mSuperListeners) {
mSuperListeners.push(superCall);
setExitSharedElementCallback(callback);
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
supportPostponeEnterTransition();
setContentView(R.layout.activity_viewer);
ButterKnife.bind(this);
index = getIntent().getIntExtra("index", 0);
realm = Realm.getDefaultInstance();
realm.addChangeListener(this);
images = Image.all(realm);
puller.setCallback(this);
adapter = new PagerAdapter();
pager.setAdapter(adapter);
pager.setCurrentItem(index);
// 避免图片在进行 Shared Element Transition 时盖过 Toolbar
if (Build.VERSION.SDK_INT >= 21) {
getWindow().setSharedElementsUseOverlay(false);
}
setEnterSharedElementCallback(new SharedElementCallback() {
@Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
Image image = images.get(pager.getCurrentItem());
sharedElements.clear();
sharedElements.put(image.getUrl(), adapter.getCurrent().getSharedElement());
}
});
}
@Override
public void initViews() {
type = getArguments().getString(EXTRA_TYPE);
showProgress();
realm = Realm.getDefaultInstance();
meizis = realm.where(MeiziTu.class)
.equalTo("type", type)
.findAll();
initRecycleView();
RxBus.getInstance().toObserverable(Intent.class)
.compose(this.bindToLifecycle())
.subscribe(intent -> {
imageIndex = intent.getIntExtra("index", -1);
scrollIndex();
finishTask();
}, throwable -> {
LogUtil.all(throwable.getMessage());
});
setEnterSharedElementCallback(new SharedElementCallback() {
@Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
super.onMapSharedElements(names, sharedElements);
String newTransitionName = meizis.get(imageIndex).getImageurl();
View newSharedView = mRecyclerView.findViewWithTag(newTransitionName);
if (newSharedView != null) {
names.clear();
names.add(newTransitionName);
sharedElements.clear();
sharedElements.put(newTransitionName, newSharedView);
}
}
});
}
@Override
public void initViews() {
cid = getArguments().getInt(EXTRA_CID);
type = getArguments().getInt(EXTRA_TYPE);
showProgress();
realm = Realm.getDefaultInstance();
doubanMeizis = realm.where(DoubanMeizi.class)
.equalTo("type", type)
.findAll();
initRecycleView();
RxBus.getInstance().toObserverable(Intent.class)
.compose(this.bindToLifecycle())
.subscribe(intent -> {
imageIndex = intent.getIntExtra("index", -1);
scrollIndex();
finishTask();
}, throwable -> {
LogUtil.all(throwable.getMessage());
});
setEnterSharedElementCallback(new SharedElementCallback() {
@Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
super.onMapSharedElements(names, sharedElements);
String newTransitionName = doubanMeizis.get(imageIndex).getUrl();
View newSharedView = mRecyclerView.findViewWithTag(newTransitionName);
if (newSharedView != null) {
names.clear();
names.add(newTransitionName);
sharedElements.clear();
sharedElements.put(newTransitionName, newSharedView);
}
}
});
}
@Override
public void setEnterSharedElementCallback(SharedElementCallback callback) {
super.setEnterSharedElementCallback(callback);
}
@Override
public void setExitSharedElementCallback(SharedElementCallback listener) {
super.setExitSharedElementCallback(listener);
}
@Override
public void setEnterSharedElementCallback(SharedElementCallback callback) {
super.setEnterSharedElementCallback(callback);
}
@Override
public void setExitSharedElementCallback(SharedElementCallback callback) {
super.setExitSharedElementCallback(callback);
}
public void setEnterSharedElementCallback(SharedElementCallback callback) {
verifyMethodCalledFromDelegate("setEnterSharedElementCallback(SharedElementCallback)");
((CallVoid1<SharedElementCallback>) mSuperListeners.pop()).call(callback);
}
public void setExitSharedElementCallback(SharedElementCallback callback) {
verifyMethodCalledFromDelegate("setExitSharedElementCallback(SharedElementCallback)");
((CallVoid1<SharedElementCallback>) mSuperListeners.pop()).call(callback);
}
public void setEnterSharedElementCallback(SharedElementCallback callback) {
mFragmentDelegate.setEnterSharedElementCallback(callback);
}
public void setExitSharedElementCallback(SharedElementCallback callback) {
mFragmentDelegate.setExitSharedElementCallback(callback);
}
@Override
public void setEnterSharedElementCallback(SharedElementCallback callback) {
delegate.setEnterSharedElementCallback(callback);
}
@Override
public void setExitSharedElementCallback(SharedElementCallback callback) {
delegate.setExitSharedElementCallback(callback);
}
@Override
public void super_setEnterSharedElementCallback(SharedElementCallback callback) {
super.setEnterSharedElementCallback(callback);
}
@Override
public void super_setExitSharedElementCallback(SharedElementCallback callback) {
super.setExitSharedElementCallback(callback);
}
@Override
public void setEnterSharedElementCallback(SharedElementCallback callback) {
delegate.setEnterSharedElementCallback(callback);
}
@Override
public void setExitSharedElementCallback(SharedElementCallback callback) {
delegate.setExitSharedElementCallback(callback);
}
@Override
public void super_setEnterSharedElementCallback(SharedElementCallback callback) {
super.setEnterSharedElementCallback(callback);
}
@Override
public void super_setExitSharedElementCallback(SharedElementCallback callback) {
super.setExitSharedElementCallback(callback);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tool_list);
final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mToolType = (ToolType) getIntent().getSerializableExtra(EXTRA_TOOL_TYPE);
if (mToolType == null) {
throw new IllegalStateException("ToolType not available as extra; use startActivity");
}
setTitle(mToolType.getToolNameResourceId());
// Set up tabs
mViewPager = (ViewPager) findViewById(R.id.viewpager);
final TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
final ToolPagerAdapter toolPagerAdapter = new ToolPagerAdapter(getSupportFragmentManager(), getResources(), mToolType);
tabLayout.setTabsFromPagerAdapter(toolPagerAdapter);
mViewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
mViewPager.setAdapter(toolPagerAdapter);
tabLayout.setOnTabSelectedListener(this);
// Handle animation from previous activity
postponeEnterTransition();
mViewPager.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
@Override
public boolean onPreDraw() {
mViewPager.getViewTreeObserver().removeOnPreDrawListener(this);
startPostponedEnterTransition();
return true;
}
});
setEnterSharedElementCallback(new SharedElementCallback() {
@Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
if (mViewPager.getCurrentItem() != 0) {
// Not displaying the about page, which has the hero image
names.clear();
sharedElements.clear();
}
}
});
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tool_list);
final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mToolType = (ToolType) getIntent().getSerializableExtra(EXTRA_TOOL_TYPE);
if (mToolType == null) {
throw new IllegalStateException("ToolType not available as extra; use startActivity");
}
setTitle(mToolType.getToolNameResourceId());
// Set up tabs
mViewPager = (ViewPager) findViewById(R.id.viewpager);
final TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
final ToolPagerAdapter toolPagerAdapter = new ToolPagerAdapter(getSupportFragmentManager(), getResources(), mToolType);
tabLayout.setTabsFromPagerAdapter(toolPagerAdapter);
mViewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
mViewPager.setAdapter(toolPagerAdapter);
tabLayout.setOnTabSelectedListener(this);
// Handle animation from previous activity
postponeEnterTransition();
mViewPager.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
@Override
public boolean onPreDraw() {
mViewPager.getViewTreeObserver().removeOnPreDrawListener(this);
startPostponedEnterTransition();
return true;
}
});
setEnterSharedElementCallback(new SharedElementCallback() {
@Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
if (mViewPager.getCurrentItem() != 0) {
// Not displaying the about page, which has the hero image
names.clear();
sharedElements.clear();
}
}
});
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MiuiStatusBarCompat.enableLightStatusBar(getWindow());
binding = DataBindingUtil.setContentView(this, R.layout.main_activity);
setSupportActionBar(binding.toolbar);
images = MrSharedState.getInstance().getImages();
Glide.get(this).setMemoryCategory(MemoryCategory.HIGH);
binding.content.setAdapter(new MainAdapter(this, images, Glide.with(this), this));
setExitSharedElementCallback(new SharedElementCallback() {
@Override
public void onMapSharedElements(List<String> names, Map<String, View> sharedElements) {
if (reenterState != null) {
int index = reenterState.getInt("index", 0);
Image image = images.get(index);
MainAdapter.ViewHolder holder = (MainAdapter.ViewHolder) binding.content
.findViewHolderForLayoutPosition(index);
sharedElements.clear();
if (holder != null && holder.binding != null) {
sharedElements.put(String.format("%s.image", image.getObjectId()), holder.binding.image);
}
reenterState = null;
}
}
});
Observable<List<Image>> load = Observable.just(images)
.doOnSubscribe(() -> binding.refresher.setRefreshing(true))
.doOnCompleted(() -> binding.refresher.setRefreshing(false))
.map(whatever -> images.isEmpty() ? Image.all() : Image.since(images.get(0)))
.observeOn(Schedulers.io())
.flatMap(RxAVQuery::find)
.observeOn(AndroidSchedulers.mainThread())
.doOnNext(RxList.prependTo(images));
RxSwipeRefreshLayout.refreshes(binding.refresher)
.compose(bindToLifecycle())
.flatMap(whatever -> load)
.retry((count, tr) -> {
Log.e(TAG, "An error occurred while fetching images", tr);
ToastUtil.shorts(this, tr.getMessage());
binding.refresher.setRefreshing(false);
return true;
})
.filter(loaded -> !loaded.isEmpty())
.subscribe(loaded -> binding.content.smoothScrollToPosition(0));
load.compose(bindToLifecycle())
.onErrorReturn(tr -> {
Log.e(TAG, "An error occurred while fetching images", tr);
ToastUtil.shorts(this, tr.getMessage());
binding.refresher.setRefreshing(false);
return null;
})
.subscribe();
UpdateUtil.checkForUpdate(version -> UpdateUtil.promptUpdate(this, version));
}
public SharedElementCallback getSharedElementCallback() {
return mSharedElementCallback;
}