[英]Android animation flip cover and ease up (open book animation)
那里有幾個按鈕/圖像。 點擊我想要這樣的動畫:
(圖像打開)書籍封面打開,相關的活動/片段在動畫中輕松打開,全屏。
有什么想法嗎 ?
在廚房應用程序iOS,廚師應用程序的鏈接發生類似的事情: https : //itunes.apple.com/us/app/cook/id687560846?mt = 8
PS:我已添加動畫,gif將在完全加載后不間斷運行。
您可以使用標准的Android動畫制作工具來實現此動畫,動畫書作為一組多個ImageViews
- 每個用於頁面表示:Cover,BackCover,FirstPage。 並在動畫完成后啟動活動或顯示片段。
動畫:
ObjectAnimator.ofFloat(mCover, "scaleY", ...)
ObjectAnimator.ofFloat(mCover, "x", ...)
ObjectAnimator.ofFloat(mCover, "rotationY", ...)
看看我的例子
(當然,這個示例需要一些優化/修復,但為了更好地理解就足夠了):
public class MainActivity extends AppCompatActivity {
private ImageView mPage1;
private ImageView mCover;
private ImageView mCoverFullScreen;
private AnimatorSet mAnimIncrease;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mCoverFullScreen = (ImageView) findViewById(R.id.cover_full_screen);
mPage1 = (ImageView) findViewById(R.id.page1);
mCover = (ImageView) findViewById(R.id.cover);
mCover.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mAnimIncrease.start();
}
});
mCoverFullScreen.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
if (mCover.getMeasuredHeight() <= 0 || mCoverFullScreen.getMeasuredHeight() <= 0) {
return;
}
if (Build.VERSION.SDK_INT >= 16) {
mCoverFullScreen.getViewTreeObserver().removeOnGlobalLayoutListener(this);
} else {
mCoverFullScreen.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
initAnimator(1000);
}
});
}
private void initAnimator(long animationDuration) {
mAnimIncrease = new AnimatorSet();
TimeInterpolator interpolator = new LinearInterpolator();
float deltaX = mCover.getMeasuredWidth() / 2f;
float deltaY = mCoverFullScreen.getY() - mCover.getY();
float scale = mCoverFullScreen.getMeasuredHeight() / (float) mCover.getMeasuredHeight();
float scaleMiddle = (scale + 1) / 2f;
float xStart = mCover.getX();
float xEnd = xStart + deltaX;
float xMiddle = xStart + deltaX * interpolator.getInterpolation(0.5f);
float xScaledEnd = xStart + deltaX * scale;
float yStart = mCover.getY();
float yEnd = yStart + deltaY;
float yMiddle = yStart + deltaY * interpolator.getInterpolation(0.5f);
AnimatorSet coverFrontSet = new AnimatorSet();
coverFrontSet.setDuration(animationDuration / 2);
coverFrontSet.playTogether(
ObjectAnimator.ofFloat(mCover, "rotationY", 0f, -90f),
ObjectAnimator.ofFloat(mCover, "pivotX", 0f),
ObjectAnimator.ofFloat(mCover, "x", xStart, xMiddle),
ObjectAnimator.ofFloat(mCover, "y", yStart, yMiddle),
ObjectAnimator.ofFloat(mCover, "scaleY", 1, scaleMiddle),
ObjectAnimator.ofFloat(mCover, "scaleX", 1, scaleMiddle)
);
coverFrontSet.addListener(new AnimatorListenerStub() {
@Override
public void onAnimationStart(Animator animation) {
super.onAnimationStart(animation);
mCover.setImageResource(R.drawable.cover);
}
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
mCover.setImageResource(R.drawable.cover_back);
}
});
AnimatorSet coverBackSet = new AnimatorSet();
coverBackSet.setDuration(animationDuration / 2);
coverBackSet.playTogether(
ObjectAnimator.ofFloat(mCover, "rotationY", -90f, -180f),
ObjectAnimator.ofFloat(mCover, "pivotX", 0f),
ObjectAnimator.ofFloat(mCover, "x", xMiddle, xEnd),
ObjectAnimator.ofFloat(mCover, "y", yMiddle, yEnd),
ObjectAnimator.ofFloat(mCover, "scaleY", scaleMiddle, scale),
ObjectAnimator.ofFloat(mCover, "scaleX", scaleMiddle, scale)
);
AnimatorSet coverSet = new AnimatorSet();
coverSet.play(coverBackSet).after(coverFrontSet);
AnimatorSet page1Set = new AnimatorSet();
page1Set.setDuration(animationDuration);
page1Set.playTogether(
ObjectAnimator.ofFloat(mPage1, "scaleX", 1, scale),
ObjectAnimator.ofFloat(mPage1, "scaleY", 1, scale),
ObjectAnimator.ofFloat(mPage1, "x", xStart, xScaledEnd)
);
mAnimIncrease.play(coverSet).with(page1Set);
mAnimIncrease.setInterpolator(interpolator);
}
}
和布局:
<RelativeLayout 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"
tools:context=".MainActivity"
>
<ImageView
android:id="@+id/page1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:src="@drawable/page1"
/>
<ImageView
android:id="@+id/cover"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:src="@drawable/cover"
/>
<ImageView
android:id="@+id/cover_full_screen"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</RelativeLayout>
你應該能夠使用android.graphics.Movie類來顯示(和運行)動畫gif。
你可以在這里找到關於這個課程的一些幫助: http : //developer.android.com/reference/android/graphics/Movie.html
但可能更多的幫助是一個有效的例子: http : //androidosbeginning.blogspot.com.au/2010/09/gif-animation-in-android.html
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