所以我在使用Android的回收视图让我的动画正常工作时出现问题。我在列表项目上设置了一些动画，然后尝试启动新活动，但循环视图在转到下一个活动之前重新加载所有视图。我尝试过设置共享转换，但它看起来仍然很跳跃。
public class ArticleListActivity extends ActionBarActivity implements
LoaderManager.LoaderCallbacks<Cursor> {
private int mFadeSleepTime = 16000;
private int mWordBuffer = 200;//number of words we will display at a time
private int mMaxChars = 0;
private int mTotalPages = 0;
private int mCurrentPage = 0;
private Toolbar mToolbar;
private SwipeRefreshLayout mSwipeRefreshLayout;
private RecyclerView mRecyclerView;
private ImageView mFAB;
private int mTextPostion = 0;
Animation fadeIn = new AlphaAnimation(0.0f, 1.0f);
Animation fadeOut = new AlphaAnimation(1.0f, 0.0f);
Animation mNewspaperClipSelectedAnimation;
Animation mNewspaperClipSlideDownAnimation;
Adapter mAdapter;
String mbodyText;
boolean mEndsInSpace = true;
boolean mIsAnimating = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_article_list);
mToolbar = (Toolbar) findViewById(R.id.toolbar);
final View toolbarContainerView = findViewById(R.id.toolbar_container);
mFAB = (ImageView) findViewById(R.id.add_to_lib_fab);
fadeIn.setDuration(2000);
fadeOut.setDuration(1000);
fadeOut.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
for (int i = 0; i < mRecyclerView.getChildCount(); i++) {
final int index = i;
View v = mRecyclerView.getChildAt(i);
v.findViewById(R.id.article_body).startAnimation(fadeIn);
mRecyclerView.invalidate();
ArticleListActivity.this.runOnUiThread(new Runnable() {
public void run() {
mAdapter.notifyItemChanged(index);
}
});
}
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_refresh_layout);
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
getLoaderManager().initLoader(0, null, this);
if (savedInstanceState == null) {
refresh();
}
mRecyclerView.setItemAnimator(null);
/* mFAB.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//TODO Add news clip to lib
}
});*/
Thread thread = new Thread() {
@Override
public void run() {
try {
while (true) {
sleep(mFadeSleepTime);
mTextPostion += mWordBuffer;
while (mEndsInSpace) {
if (mbodyText.charAt(mTextPostion) != ' ') {
mTextPostion += 1;
} else {
mEndsInSpace = false;
}
}
if (mTextPostion > mMaxChars - mWordBuffer) {
mTextPostion = 0;
mCurrentPage = -1;
}
ArticleListActivity.this.runOnUiThread(new Runnable() {
public void run() {
for (int i = 0; i < mRecyclerView.getChildCount(); i++) {
View v = mRecyclerView.getChildAt(i);
v.findViewById(R.id.article_body).startAnimation(fadeOut);
}
mCurrentPage = mCurrentPage + 1;
}
});
mEndsInSpace = true;
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};
thread.start();
mNewspaperClipSelectedAnimation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.newspaper_selected_anim);
mNewspaperClipSlideDownAnimation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.newspaper_unselected_stories_slide_out);
}
private void refresh() {
startService(new Intent(this, UpdaterService.class));
}
@Override
protected void onStart() {
super.onStart();
registerReceiver(mRefreshingReceiver, new IntentFilter(UpdaterService.BROADCAST_ACTION_STATE_CHANGE));
}
@Override
protected void onStop() {
super.onStop();
unregisterReceiver(mRefreshingReceiver);
}
private boolean mIsRefreshing = false;
private BroadcastReceiver mRefreshingReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (UpdaterService.BROADCAST_ACTION_STATE_CHANGE.equals(intent.getAction())) {
mIsRefreshing = intent.getBooleanExtra(UpdaterService.EXTRA_REFRESHING, false);
updateRefreshingUI();
}
}
};
private void updateRefreshingUI() {
mSwipeRefreshLayout.setRefreshing(mIsRefreshing);
}
@Override
public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
return ArticleLoader.newAllArticlesInstance(this);
}
@Override
public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) {
mAdapter = new Adapter(this,cursor);
mAdapter.setHasStableIds(true);
mRecyclerView.setAdapter(mAdapter);
int columnCount = getResources().getInteger(R.integer.list_column_count);
StaggeredGridLayoutManager sglm = new StaggeredGridLayoutManager(columnCount, StaggeredGridLayoutManager.VERTICAL);
mRecyclerView.setLayoutManager(sglm);
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
mRecyclerView.setAdapter(null);
}
private class Adapter extends RecyclerView.Adapter<ViewHolder> {
private Cursor mCursor;
private Context mContext;
public Adapter(Context context,Cursor cursor) {
mContext = context;
mCursor = cursor;
}
@Override
public long getItemId(int position) {
mCursor.moveToPosition(position);
return mCursor.getLong(ArticleLoader.Query._ID);
}
@Override
public ViewHolder onCreateViewHolder(final ViewGroup parent, int viewType) {
View view = getLayoutInflater().inflate(R.layout.list_item_article, parent, false);
final ViewHolder vh = new ViewHolder(view);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View view) {
for (int i = 0; i < mRecyclerView.getChildCount(); i++) {
View v = mRecyclerView.getChildAt(i);
v.findViewById(R.id.article_body).startAnimation(fadeOut);
v.setAnimation(mNewspaperClipSlideDownAnimation);
v.startAnimation(mNewspaperClipSlideDownAnimation);
}
ExpandingCardViewAnimation animation = new ExpandingCardViewAnimation(getApplicationContext(),parent,view);
animation.configureAnimation();
view.clearAnimation();
view.setAnimation(mNewspaperClipSelectedAnimation);
view.startAnimation(mNewspaperClipSelectedAnimation);
mNewspaperClipSlideDownAnimation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
String transitionName = getString(R.string.transition_list_item);
Activity activity = (Activity) mContext;
ActivityOptionsCompat options = ActivityOptionsCompat.makeSceneTransitionAnimation(activity, mRecyclerView,transitionName);
ActivityCompat.startActivity(activity, new Intent(Intent.ACTION_VIEW, ItemsContract.Items.buildItemUri(getItemId(vh.getAdapterPosition()))), options.toBundle());
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
}
});
return vh;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
mCursor.moveToPosition(position);
holder.titleView.setText(mCursor.getString(ArticleLoader.Query.TITLE));
holder.subtitleView.setText(
DateUtils.getRelativeTimeSpanString(
mCursor.getLong(ArticleLoader.Query.PUBLISHED_DATE),
System.currentTimeMillis(), DateUtils.HOUR_IN_MILLIS,
DateUtils.FORMAT_ABBREV_ALL).toString()
+ " by "
+ mCursor.getString(ArticleLoader.Query.AUTHOR));
holder.thumbnailView.setImageUrl(
mCursor.getString(ArticleLoader.Query.THUMB_URL),
ImageLoaderHelper.getInstance(ArticleListActivity.this).getImageLoader());
holder.thumbnailView.setAspectRatio(mCursor.getFloat(ArticleLoader.Query.ASPECT_RATIO));
mbodyText = mCursor.getString(ArticleLoader.Query.BODY);
mMaxChars = mbodyText.length();
mTotalPages = mMaxChars/mWordBuffer;
holder.bodyView.setText(mbodyText.substring(mTextPostion, mTextPostion + mWordBuffer));
holder.pagesview.removeAllViews();
for(int i = 0; i < mTotalPages; i++){
TextView mPageText = new TextView(getApplicationContext());
mPageText.setLayoutParams(new RelativeLayout.LayoutParams(RecyclerView.LayoutParams.WRAP_CONTENT, RecyclerView.LayoutParams.WRAP_CONTENT));
mPageText.setText(Integer.toString(i + 1));
mPageText.setPadding(10,10,10,0);
mPageText.setTextSize(19);
if(mCurrentPage == i)
mPageText.setTextColor(getResources().getColor(R.color.highlited_page_color));
else
mPageText.setTextColor(getResources().getColor(R.color.blue_page_number_color));
holder.pagesview.addView(mPageText);
}
}
@Override
public int getItemCount() {
return mCursor.getCount();
}
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public DynamicHeightNetworkImageView thumbnailView;
public TextView titleView;
public TextView subtitleView;
public TextView bodyView;
public LinearLayout pagesview;
public ViewHolder(final View view) {
super(view);
thumbnailView = (DynamicHeightNetworkImageView) view.findViewById(R.id.thumbnail);
titleView = (TextView) view.findViewById(R.id.article_title);
subtitleView = (TextView) view.findViewById(R.id.article_subtitle);
bodyView = (TextView) view.findViewById(R.id.article_body);
pagesview = (LinearLayout) view.findViewById(R.id.newspaper_clip_pages);
}
}
}
**列表项上的转换
<?xml version="1.0" encoding="utf-8"?>
<set
android:shareInterpolator="true"
xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:interpolator="@android:anim/accelerate_decelerate_interpolator"
android:fromXScale="1.0"
android:toXScale="1.0"
android:fromYScale="1.0"
android:toYScale="1.4"
android:pivotX="50%"
android:pivotY="50%"
android:fillAfter="true"
android:duration="1500" />
</set>
<?xml version="1.0" encoding="utf-8"?>
<set
xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false">
<alpha
android:fromAlpha="1.0"
android:toAlpha="0.0"
android:duration="1400" />
</set>
答案 0 :(得分：0)
所以我最终找到了答案，我将循环视图的子视图设置为在动画结束时不可见，并设置延迟的动画过渡。这是工作代码。
private int calculate() {
return (bytes[0] & 0xff) + ((bytes[1] & 0xff) << 8);
}