android - 如何在android中实现滑动显示动画？

Question

我创建了 5 个 Activity ，每个 Activity 都有一个仅包含图像的 ListView。我使用了一个简单的滑动动画来改变 Activity 。

相关代码如下:

@Override
public boolean onTouchEvent(MotionEvent event) {
    if (gestureDetector.onTouchEvent(event)) {
        return true;
    }
    return super.onTouchEvent(event);
}

private void onLeftSwipe() {
    Intent intent = new Intent(HimachalActivity.this, IndianWildlifeActivity.class);
    startActivity(intent);
    overridePendingTransition(R.anim.slide_left_in, R.anim.slide_left_out);
}

private void onRightSwipe() {
    Intent intent = new Intent(HimachalActivity.this, BaseActivity.class);
    startActivity(intent);
    overridePendingTransition(R.anim.slide_right_in, R.anim.slide_right_out);
}

private class SwipeGestureDetector extends GestureDetector.SimpleOnGestureListener {
    // Swipe properties, you can change it to make the swipe
    // longer or shorter and speed
    private static final int SWIPE_MIN_DISTANCE = 120;
    private static final int SWIPE_MAX_OFF_PATH = 200;
    private static final int SWIPE_THRESHOLD_VELOCITY = 200;

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2,
                           float velocityX, float velocityY) {
        try {
            float diffAbs = Math.abs(e1.getY() - e2.getY());
            float diff = e1.getX() - e2.getX();

            if (diffAbs > SWIPE_MAX_OFF_PATH)
                return false;

            // Left swipe
            if (diff > SWIPE_MIN_DISTANCE
                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                HimachalActivity.this.onLeftSwipe();

                // Right swipe
            } else if (-diff > SWIPE_MIN_DISTANCE
                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                HimachalActivity.this.onRightSwipe();
            }
        } catch (Exception e) {
            Log.e("BaseActivity", "Error on gestures");
        }
        return false;
    }
}

问题是下一个 Activity 或上一个 Activity 只有在完全滑动后才会打开，而且动画感觉不那么流畅。

我想要一个动画，其中下一个 Activity 或上一个 Activity 在我开始滑动时立即开始显示。有没有可以应用的内置动画。如果没有，请指出我自己创建一个的任何相关资源，可能不需要我对现有代码进行太多修改。谢谢。

Answer 1

据我所知，这个功能在 Lollipop Material 设计模块中很容易获得。