所以，我面临的问题是我在两个活动和两个共享视图之间做的动画看起来不太好。
问题是它的“故障”，当从 Activity2 回到 Activity1 时，共享的 TextViews 在动画结束时会闪烁，从 Activity2 显示“更大的文本”一秒钟，所以它“闪烁”。
活动一（RecyclerView 有三项）：
活动二（详情）：
我在制作动画的同时拍摄了屏幕。当从 Activity2 回到 Activit2 时，您可以看到文本在最后闪烁。该视频（36MB，大小抱歉）显示：
https://drive.google.com/file/d/0B3wIZ9CS9Kj_a0MyVFlzX1YtY0E/view?usp=sharing
问题是：我做错了什么？为什么会这样闪烁？我看过其他动画的视频，它们都非常流畅和漂亮。
我测试了不同类型的转换（changeBounds、explode 等），但总是有一些奇怪的事情发生。任何提示，想法将不胜感激=）
我的代码
主要活动（活动1）：
package se.snapcode.lollipoptest;
import android.app.Activity;
import android.app.ActivityOptions;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.view.GestureDetectorCompat;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.util.Pair;
import android.view.GestureDetector;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v7.widget.RecyclerView;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private RecyclerView mRecyclerView;
private MyAdapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
GestureDetectorCompat gestureDetector;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
// use this setting to improve performance if you know that changes
// in content do not change the layout size of the RecyclerView
mRecyclerView.setHasFixedSize(true);
// use a linear layout manager
mLayoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(mLayoutManager);
// specify an adapter (see also next example)
String[] strings = new String[3];
strings[0] = "A1";
strings[1] = "A2";
strings[2] = "A3";
mAdapter = new MyAdapter(strings);
mRecyclerView.setAdapter(mAdapter);
mAdapter.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(View view, int position) {
final TextView headerView = (TextView)view.findViewById(R.id.textView1);
final TextView textView = (TextView)view.findViewById(R.id.textView2);
Intent intent = new Intent(MainActivity.this, DetailsActivity.class);
intent.putExtra("header", headerView.getText().toString());
intent.putExtra("text", textView.getText().toString());
ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(MainActivity.this, Pair.create((View)headerView, "header"),
Pair.create((View)textView, "text"));
startActivity(intent, options.toBundle());
}
});
RecyclerView.ItemDecoration itemDecoration =
new DividerItemDecoration(this, DividerItemDecoration.VERTICAL_LIST);
mRecyclerView.addItemDecoration(itemDecoration);
// this is the default; this call is actually only necessary with custom ItemAnimators
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
}
}
详情活动（活动2）：
package se.snapcode.lollipoptest;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
public class DetailsActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_details);
String header = getIntent().getStringExtra("header");
String text = getIntent().getStringExtra("text");
TextView tv1 = (TextView)findViewById(R.id.tv_details_header);
tv1.setText(header);
TextView tv2 = (TextView)findViewById(R.id.tv_details_text);
tv2.setText(text);
}
}
而布局，首先是位于 RecyclerView 列表中的 my_text_view：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
android:focusable="true"
android:background="?android:attr/selectableItemBackground"
android:colorControlHighlight="@android:color/holo_blue_light"
android:padding="10dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="MY HEADER IS HERE"
android:transitionName="header"
android:id="@+id/textView1" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="This is some text that is of relevance"
android:transitionName="text"
android:id="@+id/textView2" />
</LinearLayout>
还有activity_details.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context="se.snapcode.lollipoptest.DetailsActivity">
<TextView android:id="@+id/tv_details_header" android:text="A1" android:layout_width="wrap_content"
android:transitionName="header"
android:textSize="48dp"
android:layout_height="wrap_content" />
<TextView android:id="@+id/tv_details_text" android:text="Some text of lesser importance" android:layout_width="wrap_content"
android:textSize="24dp"
android:transitionName="text"
android:layout_height="wrap_content" />
</LinearLayout>
以及过渡 xml（在 /res/transition 中）：
<?xml version="1.0" encoding="utf-8"?>
<transitionSet xmlns:android="http://schemas.android.com/apk/res/android">
<changeBounds/>
<explode />
</transitionSet>
和styles.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="AppTheme" parent="android:Theme.Material.Light">
<!-- enable window content transitions -->
<item name="android:windowContentTransitions">true</item>
<!-- specify enter and exit transitions -->
<item name="android:windowEnterTransition">@android:transition/slide_left</item>
<item name="android:windowExitTransition">@android:transition/slide_right</item>
<!-- specify shared element transitions -->
<item name="android:windowSharedElementEnterTransition">
@transition/change_image_transform</item>
<item name="android:windowSharedElementExitTransition">
@transition/change_image_transform</item>
</style>
</resources>