android - Android - 谷歌地图将相机从一个位置移动到另一个位置

Question

很快，我想知道如何使用动画将相机从当前位置移动到另一个位置。这是我的尝试：

 mapView.moveCamera(CameraUpdateFactory.newLatLngZoom(targetPos, 3));
 mapView.animateCamera(CameraUpdateFactory.zoomTo(5), 2000, null);

但谷歌地图确实将相机从某个位置移动到目标。我如何设置它从 A 移动到目标，A 是我可以设置的某个位置？提前致谢。

Answer 1

查看地图示例中 CameraDemoActivity 中的代码。要转到某个位置，您需要有一个 CameraPosition。

static final CameraPosition SYDNEY =
        new CameraPosition.Builder().target(new LatLng(-33.87365, 151.20689))
                .zoom(15.5f)
                .bearing(0)
                .tilt(25)
                .build();



public void onGoToSydney(View view) {   
    changeCamera(CameraUpdateFactory.newCameraPosition(SYDNEY), new CancelableCallback() {
        @Override
        public void onFinish() {
            Toast.makeText(getBaseContext(), "Animation to Sydney complete", Toast.LENGTH_SHORT)
                    .show();
        }

        @Override
        public void onCancel() {
            Toast.makeText(getBaseContext(), "Animation to Sydney canceled", Toast.LENGTH_SHORT)
                    .show();
        }
    });
}


/**
 * Change the camera position by moving or animating the camera depending on the state of the
 * animate toggle button.
 */
private void changeCamera(CameraUpdate update, CancelableCallback callback) {
    if (mAnimateToggle.isChecked()) {
        if (mCustomDurationToggle.isChecked()) {
            int duration = mCustomDurationBar.getProgress();
            // The duration must be strictly positive so we make it at least 1.
            mMap.animateCamera(update, Math.max(duration, 1), callback);
        } else {
            mMap.animateCamera(update, callback);
        }
    } else {
        mMap.moveCamera(update);
    }
}