我在我的应用程序中使用自定义视图（非常类似于Volley的NetworkImageView）。
当我在适配器上充气时（例如：在列表视图中）它可以完美地运行。
但是当我尝试将其直接用于InflateException时，我收到一个奇怪的Fragment：
它很奇怪，因为ClassName在堆栈中显得不同
例外：
android.view.InflateException: Binary XML file line #8: Error inflating class NetworkImageViewTransformed
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:707)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
at android.view.LayoutInflater.parseInclude(LayoutInflater.java:839)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:745)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:758)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at com.myapp.fragments.ProfileFragment.onCreateView(ProfileFragment.java:81)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1500)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:472)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1068)
at android.support.v4.view.ViewPager.populate(ViewPager.java:914)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436)
at android.view.View.measure(View.java:16497)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:327)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
at android.view.View.measure(View.java:16497)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1916)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1113)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1295)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5670)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.NetworkImageViewTransformed" on path: DexPathList[[zip file "/data/app/com.myapp-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.myapp-2, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at android.view.LayoutInflater.createView(LayoutInflater.java:559)
at android.view.LayoutInflater.onCreateView(LayoutInflater
这是我的XML（部分）：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.myapp.views.TransformedNetworkImageView
android:layout_width="120dp"
android:layout_height="120dp"
android:id="@+id/blur_picture"
android:layout_gravity="top"
/>
</FrameLayout>
正如您所看到的，我的视图应该是com.myapp.views.TransformedNetworkImageView的一个实例，但堆栈会引用NetworkImageViewTransformed和android.view.NetworkImageViewTransformed
我已经尝试过无效缓存了;干净重建;重启Android工作室......没有任何改变。
编辑onCreateView（通货膨胀时崩溃）：
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_profile, container, false);
mBlurPicture = (TransformedNetworkImageView) view.findViewById(R.id.blur_picture);
.....
return view;
}
这里是TransformedNetworkImageView的完整代码：
public class TransformedNetworkImageView extends ImageView {
/**
* Interface to transform the bitmap image before the draw
*/
public static interface OnBitmapDisplayedListener {
public Bitmap onBitmapDisplayed(Bitmap downloadedBitmap);
}
/** The URL of the network image to load */
private String mUrl;
/**
* Resource ID of the image to be used as a placeholder until the network image is loaded.
*/
private int mDefaultImageId;
/**
* Resource ID of the image to be used if the network response fails.
*/
private int mErrorImageId;
/** Local copy of the ImageLoader. */
private ImageLoader mImageLoader;
/** Current ImageContainer. (either in-flight or finished) */
private ImageContainer mImageContainer;
private OnBitmapDisplayedListener mBitmapDisplayedListener;
public TransformedNetworkImageView(Context context) {
this(context, null);
init();
}
public TransformedNetworkImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
init();
}
public TransformedNetworkImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
/**
* Sets URL of the image that should be loaded into this view. Note that calling this will
* immediately either set the cached image (if available) or the default image specified by
* {@link TransformedNetworkImageView#setDefaultImageResId(int)} on the view.
*
* NOTE: If applicable, {@link TransformedNetworkImageView#setDefaultImageResId(int)} and
* {@link TransformedNetworkImageView#setErrorImageResId(int)} should be called prior to calling
* this function.
*
* @param url The URL that should be loaded into this ImageView.
* @param imageLoader ImageLoader that will be used to make the request.
*/
public void setImageUrl(String url, ImageLoader imageLoader) {
mUrl = url;
mImageLoader = imageLoader;
// The URL has potentially changed. See if we need to load it.
loadImageIfNecessary(false);
}
/**
* Sets the default image resource ID to be used for this view until the attempt to load it
* completes.
*/
public void setDefaultImageResId(int defaultImage) {
mDefaultImageId = defaultImage;
}
/**
* Sets the error image resource ID to be used for this view in the event that the image
* requested fails to load.
*/
public void setErrorImageResId(int errorImage) {
mErrorImageId = errorImage;
}
/**
* Loads the image for the view if it isn't already loaded.
* @param isInLayoutPass True if this was invoked from a layout pass, false otherwise.
*/
void loadImageIfNecessary(final boolean isInLayoutPass) {
int width = getWidth();
int height = getHeight();
boolean wrapWidth = false, wrapHeight = false;
if (getLayoutParams() != null) {
wrapWidth = getLayoutParams().width == LayoutParams.WRAP_CONTENT;
wrapHeight = getLayoutParams().height == LayoutParams.WRAP_CONTENT;
}
// if the view's bounds aren't known yet, and this is not a wrap-content/wrap-content
// view, hold off on loading the image.
boolean isFullyWrapContent = wrapWidth && wrapHeight;
if (width == 0 && height == 0 && !isFullyWrapContent) {
return;
}
// if the URL to be loaded in this view is empty, cancel any old requests and clear the
// currently loaded image.
if (TextUtils.isEmpty(mUrl)) {
if (mImageContainer != null) {
mImageContainer.cancelRequest();
mImageContainer = null;
}
setDefaultImageOrNull();
return;
}
// if there was an old request in this view, check if it needs to be canceled.
if (mImageContainer != null && mImageContainer.getRequestUrl() != null) {
if (mImageContainer.getRequestUrl().equals(mUrl)) {
// if the request is from the same URL, return.
return;
} else {
// if there is a pre-existing request, cancel it if it's fetching a different URL.
mImageContainer.cancelRequest();
setDefaultImageOrNull();
}
}
// Calculate the max image width / height to use while ignoring WRAP_CONTENT dimens.
int maxWidth = wrapWidth ? 0 : width;
int maxHeight = wrapHeight ? 0 : height;
// The pre-existing content of this view didn't match the current URL. Load the new image
// from the network.
ImageContainer newContainer = mImageLoader.get(mUrl,
new ImageListener() {
@Override
public void onErrorResponse(VolleyError error) {
if (mErrorImageId != 0) {
setImageBitmap(mBitmapDisplayedListener.onBitmapDisplayed(
BitmapFactory.decodeResource(getContext().getResources(),
mErrorImageId)));
}
}
@Override
public void onResponse(final ImageContainer response, boolean isImmediate) {
// If this was an immediate response that was delivered inside of a layout
// pass do not set the image immediately as it will trigger a requestLayout
// inside of a layout. Instead, defer setting the image by posting back to
// the main thread.
if (isImmediate && isInLayoutPass) {
post(new Runnable() {
@Override
public void run() {
onResponse(response, false);
}
});
return;
}
if (response.getBitmap() != null) {
setImageBitmap(mBitmapDisplayedListener.onBitmapDisplayed(
response.getBitmap()));
} else if (mDefaultImageId != 0) {
setImageBitmap(mBitmapDisplayedListener.onBitmapDisplayed(
BitmapFactory.decodeResource(getContext().getResources(),
mDefaultImageId)));
}
}
}, maxWidth, maxHeight);
// update the ImageContainer to be the new bitmap container.
mImageContainer = newContainer;
}
/**
* Initiate the default bitmap transformation listener
*/
private void init() {
setOnBitmapDisplayedListener(new OnBitmapDisplayedListener() {
@Override
public Bitmap onBitmapDisplayed(final Bitmap downloadedBitmap) {
return downloadedBitmap;
}
});
}
public void setOnBitmapDisplayedListener(OnBitmapDisplayedListener listener) {
mBitmapDisplayedListener = listener;
}
private void setDefaultImageOrNull() {
if(mDefaultImageId != 0) {
setImageBitmap(mBitmapDisplayedListener.onBitmapDisplayed(
BitmapFactory.decodeResource(getContext().getResources(),
mDefaultImageId))); }
else {
setImageBitmap(null);
}
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
loadImageIfNecessary(true);
}
@Override
protected void onDetachedFromWindow() {
if (mImageContainer != null) {
// If the view was bound to an image request, cancel it and clear
// out the image from the view.
mImageContainer.cancelRequest();
setImageBitmap(null);
// also clear out the container so we can reload the image if necessary.
mImageContainer = null;
}
super.onDetachedFromWindow();
}
@Override
protected void drawableStateChanged() {
super.drawableStateChanged();
invalidate();
}
}
答案 0 :(得分：2)
这肯定是一个缓存问题，感谢Android Studio ......
仅供参考：我关闭了我的项目，关闭了IDE，启动了./gradlew clean并重启以使其正常工作。