我的朋友正在帮我处理好大部分代码，直到他离开。他的编码比我好。这就是问题所在：
好的，所以我在这一行得到了一个nullpointerexception：
infoLayout.setVisibility(View.VISIBLE);
如果我删除这一行，我将在该行获得一个新的nullpointerexception：
.into(expandedImage);
onMarkerClick的完整代码如下所示：
@Override
public boolean onMarkerClick(Marker marker) {
markerTarget = targets.get(marker.getId());
Projection projection = map.getProjection();
LatLng markerLocation = marker.getPosition();
Point markerPosition = projection.toScreenLocation(markerLocation);
if (markerTarget != null) {
infoLayout.setVisibility(View.VISIBLE);
Drawable d = new BitmapDrawable(getResources(), markerTarget.thumbBitmap);
Picasso.with(getApplicationContext())
.load(markerTarget.media.images.standard_resolution.url)
.placeholder(d)
//.transform(new CircleTransform())
.into(expandedImage);
zoomImageFromThumb(markerPosition, markerTarget);
}
return true;
}
我在课堂顶部使用注射了黄油刀的视图，如下所示：
@InjectView(R.id.expanded_image) ImageView expandedImage;
@InjectView(R.id.info_layout) View infoLayout;
这是整个班级的样子：
public class PhotoActivity extends MapActivity {
private AnimatorSet mCurrentAnimator;
private Rect startBounds;
private float startScaleFinal;
private MarkerTarget markerTarget;
@InjectView(R.id.expanded_image) ImageView expandedImage;
@InjectView(R.id.info_layout) View infoLayout;
@InjectView(R.id.username) TextView usernameTxt;
@InjectView(R.id.comments) TextView commentsTxt;
@InjectView(R.id.user_photo) ImageView userPhoto;
@Override
public void onBackPressed() {
if (infoLayout.isShown()) {
hideMediaInfo();
} else {
super.onBackPressed();
}
}
public void onClickUsername(View view) {
Intents.openLink(this, markerTarget.media.link);
}
@Override
public boolean onMarkerClick(Marker marker) {
markerTarget = targets.get(marker.getId());
Projection projection = map.getProjection();
LatLng markerLocation = marker.getPosition();
Point markerPosition = projection.toScreenLocation(markerLocation);
if (markerTarget != null) {
infoLayout.setVisibility(View.VISIBLE);
Drawable d = new BitmapDrawable(getResources(), markerTarget.thumbBitmap);
Picasso.with(getApplicationContext())
.load(markerTarget.media.images.standard_resolution.url)
.placeholder(d)
//.transform(new CircleTransform())
.into(expandedImage);
zoomImageFromThumb(markerPosition, markerTarget);
}
return true;
}
private void showMediaInfo(MarkerTarget markerTarget) {
Animations.moveFromTop(commentsTxt);
Animations.moveFromBottom(usernameTxt);
Animations.moveFromBottom(userPhoto);
commentsTxt.setVisibility(View.VISIBLE);
usernameTxt.setVisibility(View.VISIBLE);
usernameTxt.setText(markerTarget.media.user.username);
Picasso.with(getApplicationContext()).load(markerTarget.media.user.profile_picture)
.transform(new CircleTransform())
.into(userPhoto);
if (markerTarget.media.caption != null)
commentsTxt.setText(
spannableComment(markerTarget.media.caption.from.username, markerTarget.media.caption.text));
if (markerTarget.media.comments.count > 0)
for (Media.Comments.Comment comment : markerTarget.media.comments.data) {
commentsTxt.append(
spannableComment("\n" + comment.from.username, comment.text));
}
}
private Spannable spannableComment(String username, String comment) {
Spannable wordtoSpan =
new SpannableString(username + " " + comment);
wordtoSpan.setSpan(
new ForegroundColorSpan(getResources().getColor(R.color.accent)),
0, username.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
return wordtoSpan;
}
private void zoomImageFromThumb(Point startPoint, final MarkerTarget markerTarget) {
// If there's an animation in progress, cancel it
// immediately and proceed with this one.
if (mCurrentAnimator != null) {
mCurrentAnimator.cancel();
}
// Calculate the starting and ending bounds for the zoomed-in image.
// This step involves lots of math. Yay, math.
startBounds = new Rect();
final Rect finalBounds = new Rect();
final Point globalOffset = new Point();
// The start bounds are the global visible rectangle of the thumbnail,
// and the final bounds are the global visible rectangle of the container
// view. Also set the container view's offset as the origin for the
// bounds, since that's the origin for the positioning animation
// properties (X, Y).
// thumbView.getGlobalVisibleRect(startBounds);
startBounds.left = startPoint.x - getMarkerPhotoSize() / 2;
startBounds.right = startPoint.x + getMarkerPhotoSize() / 2;
startBounds.top = startPoint.y - getMarkerPhotoSize() / 2;
startBounds.bottom = startPoint.y + getMarkerPhotoSize() / 2;
findViewById(R.id.container).getGlobalVisibleRect(finalBounds, globalOffset);
startBounds.offset(-globalOffset.x, -globalOffset.y);
finalBounds.offset(-globalOffset.x, -globalOffset.y + usernameTxt.getHeight());
// Adjust the start bounds to be the same aspect ratio as the final
// bounds using the "center crop" technique. This prevents undesirable
// stretching during the animation. Also calculate the start scaling
// factor (the end scaling factor is always 1.0).
float startScale;
if ((float) finalBounds.width() / finalBounds.height()
> (float) startBounds.width() / startBounds.height()) {
// Extend start bounds horizontally
startScale = (float) startBounds.height() / finalBounds.height();
float startWidth = startScale * finalBounds.width();
float deltaWidth = (startWidth - startBounds.width()) / 2;
startBounds.left -= deltaWidth;
startBounds.right += deltaWidth;
} else {
// Extend start bounds vertically
startScale = (float) startBounds.width() / finalBounds.width();
float startHeight = startScale * finalBounds.height();
float deltaHeight = (startHeight - startBounds.height()) / 2;
startBounds.top -= deltaHeight;
startBounds.bottom += deltaHeight;
}
// Hide the thumbnail and show the zoomed-in view. When the animation
// begins, it will position the zoomed-in view in the place of the
// thumbnail.
//thumbView.setAlpha(0f);
expandedImage.setVisibility(View.VISIBLE);
// Set the pivot point for SCALE_X and SCALE_Y transformations
// to the top-left corner of the zoomed-in view (the default
// is the center of the view).
expandedImage.setPivotX(0f);
expandedImage.setPivotY(0f);
// Construct and run the parallel animation of the four translation and
// scale properties (X, Y, SCALE_X, and SCALE_Y).
AnimatorSet set = new AnimatorSet();
set
.play(ObjectAnimator.ofFloat(expandedImage, View.X,
startBounds.left, finalBounds.left))
.with(ObjectAnimator.ofFloat(expandedImage, View.Y,
startBounds.top, finalBounds.top))
.with(ObjectAnimator.ofFloat(expandedImage, View.SCALE_X,
startScale, 1f)).with(ObjectAnimator.ofFloat(expandedImage,
View.SCALE_Y, startScale, 1f));
set.setDuration(300);
set.setInterpolator(new AccelerateInterpolator());
set.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mCurrentAnimator = null;
showMediaInfo(markerTarget);
}
@Override
public void onAnimationCancel(Animator animation) {
mCurrentAnimator = null;
}
});
set.start();
mCurrentAnimator = set;
// Upon clicking the zoomed-in image, it should zoom back down
// to the original bounds and show the thumbnail instead of
// the expanded image.
startScaleFinal = startScale;
expandedImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
hideMediaInfo();
}
});
}
private void hideMediaInfo() {
Animations.moveTo(commentsTxt, true);
Animations.moveTo(userPhoto, false);
Animations.moveTo(usernameTxt, false, new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
userPhoto.setImageDrawable(null);
usernameTxt.setVisibility(View.GONE);
commentsTxt.setVisibility(View.GONE);
zoomOutImage();
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
}
private void zoomOutImage() {
if (mCurrentAnimator != null) {
mCurrentAnimator.cancel();
}
// Animate the four positioning/sizing properties in parallel,
// back to their original values.
AnimatorSet set = new AnimatorSet();
set.play(ObjectAnimator
.ofFloat(expandedImage, View.X, startBounds.left))
.with(ObjectAnimator
.ofFloat(expandedImage,
View.Y, startBounds.top))
.with(ObjectAnimator
.ofFloat(expandedImage,
View.SCALE_X, startScaleFinal))
.with(ObjectAnimator
.ofFloat(expandedImage,
View.SCALE_Y, startScaleFinal));
set.setDuration(200);
set.setInterpolator(new DecelerateInterpolator());
set.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
// thumbView.setAlph
infoLayout.setVisibility(View.INVISIBLE);
expandedImage.setVisibility(View.INVISIBLE);
mCurrentAnimator = null;
}
@Override
public void onAnimationCancel(Animator animation) {
// thumbView.setAlph
infoLayout.setVisibility(View.INVISIBLE);
expandedImage.setVisibility(View.INVISIBLE);
mCurrentAnimator = null;
}
});
set.start();
mCurrentAnimator = set;
}
}