Android中转场动画的实现与兼容性处理

<explode xmlns:android="http://schemas.android.com/apk/res/android">
 <targets>
  <target android:excludeId="@android:id/statusBarBackground"/>
  <target android:excludeId="@android:id/navigationBarBackground"/>
 </targets>
</explode>

<transitionSet xmlns:android="http://schemas.android.com/apk/res/android">
 <slide android:slideEdge="bottom">
  <targets>
   <target android:targetId="@id/cardview"/>
  </targets>
 </slide>

 <fade>
  <targets>
   <target android:excludeId="@android:id/statusBarBackground"/>
   <target android:excludeId="@android:id/navigationBarBackground"/>
   <target android:excludeId="@id/cardview"/>
  </targets>
 </fade>
</transitionSet>

<style name="BaseAppTheme" parent="android:Theme.Material">
 <!-- 开启过渡效果 -->
 <item name="android:windowContentTransitions">true</item>

 <!-- 指定界面进入/退出动画效果 -->
 <item name="android:windowEnterTransition">@transition/explode</item>
 <item name="android:windowExitTransition">@transition/explode</item>

 <!-- 指定共享元素进入/退出的动画效果 -->
 <item name="android:windowSharedElementEnterTransition">
 @transition/change_image_transform</item>
 <item name="android:windowSharedElementExitTransition">
 @transition/change_image_transform</item>
</style>

<style name="AppTheme.Detail">
 <item name="windowActionBar">false</item>
 <item name="android:windowNoTitle">true</item>
 <item name="android:windowTranslucentStatus">true</item>
 <item name="android:windowAllowEnterTransitionOverlap">false</item>
 <item name="android:windowEnterTransition">@transition/detail_enter</item>
</style>

// 创建一个包含过渡动画信息的 ActivityOptions 对象
ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(this, view, getString(R.string.image_transition_name));

// 使用 Intent 跳转界面，并传递共享对象信息
Intent intent = new Intent(this, DetailActivity.class);
startActivity(intent, optionsCompat.toBundle());

ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(this, Pair.create(view1, "agreedName1"), Pair.create(view2, "agreedName2"));

public void imageClick(View view) {
 Intent intent = new Intent(AnimeActivity.this, AnimeDetailActivity.class);
 // 创建一个 rect 对象来存储共享元素位置信息
 Rect rect = new Rect();
 // 获取元素位置信息
 view.getGlobalVisibleRect(rect);
 // 将位置信息附加到 intent 上
 intent.setSourceBounds(rect);
 CustomImage customImage = (CustomImage) view;
 intent.putExtra(AnimeDetailActivity.EXTRA_IMAGE, customImage.getImageId());
 startActivity(intent);
 // 屏蔽 Activity 默认转场效果
 overridePendingTransition(0, 0);
}

private void initial() {
 // 获取上一个界面传入的信息
 mRect = getIntent().getSourceBounds();
 mRescourceId = getIntent().getExtras().getInt(EXTRA_IMAGE);

 // 获取上一个界面中，图片的宽度和高度
 mOriginWidth = mRect.right - mRect.left;
 mOriginHeight = mRect.bottom - mRect.top;

 // 设置 ImageView 的位置，使其和上一个界面中图片的位置重合
 FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(mOriginWidth, mOriginHeight);
 params.setMargins(mRect.left, mRect.top - getStatusBarHeight(), mRect.right, mRect.bottom);
 mImageView.setLayoutParams(params);

 // 设置 ImageView 的图片和缩放类型
 mImageView.setImageResource(mRescourceId);
 mImageView.setScaleType(ImageView.ScaleType.CENTER_CROP);

 // 根据上一个界面传入的图片资源 ID，获取图片的 Bitmap 对象。
 BitmapDrawable bitmapDrawable = (BitmapDrawable) getResources().getDrawable(mRescourceId);
 Bitmap bitmap = bitmapDrawable.getBitmap();

 // 计算图片缩放比例和位移距离
 getBundleInfo(bitmap);

 // 创建一个 Pallette 对象
 mImagePalette = Palette.from(bitmap).generate();
 // 使用 Palette 设置背景颜色
 mContainer.setBackgroundColor(
   mImagePalette.getVibrantColor(ContextCompat.getColor(this, android.R.color.black)));
}

private void getBundleInfo(Bitmap bitmap) {
 // 计算图片缩放比例，并存储在 bundle 中
 if (bitmap.getWidth() >= bitmap.getHeight()) {
  mScaleBundle.putFloat(SCALE_WIDTH, (float) mScreenWidth / mOriginWidth);
  mScaleBundle.putFloat(SCALE_HEIGHT, (float) bitmap.getHeight() / mOriginHeight);
 } else {
  mScaleBundle.putFloat(SCALE_WIDTH, (float) bitmap.getWidth() / mOriginWidth);
  mScaleBundle.putFloat(SCALE_HEIGHT, (float) mScreenHeight / mOriginHeight);
 }
 // 计算位移距离，并将数据存储到 bundle 中
 mTransitionBundle.putFloat(TRANSITION_X, mScreenWidth / 2 - (mRect.left + (mRect.right - mRect.left) / 2));
 mTransitionBundle.putFloat(TRANSITION_Y, mScreenHeight / 2 - (mRect.top + (mRect.bottom - mRect.top) / 2));
}

private void runEnterAnim() {
 mImageView.animate()
    .setInterpolator(DEFAULT_INTERPOLATOR)
    .setDuration(DURATION)
    .scaleX(mScaleBundle.getFloat(SCALE_WIDTH))
    .scaleY(mScaleBundle.getFloat(SCALE_HEIGHT))
    .translationX(mTransitionBundle.getFloat(TRANSITION_X))
    .translationY(mTransitionBundle.getFloat(TRANSITION_Y))
    .start();
}

private void runExitAnim() {
 mImageView.animate()
    .setInterpolator(DEFAULT_INTERPOLATOR)
    .setDuration(DURATION)
    .scaleX(1)
    .scaleY(1)
    .translationX(0)
    .translationY(0)
    .withEndAction(new Runnable() {
     @Override
     public void run() {
      finish();
      overridePendingTransition(0, 0);
     }
    })
    .start();
}