问题描述
我正在YouTube上的 freeCodeCamp.org 上学习有关 Android Studio速成课程的教程。直到 RecycleView 部分为止，到目前为止一切都很好。我们使用了 Glide 来显示来自互联网的图像，由于某种原因，它对我不起作用。我评论了 Glide 代码，它起作用了；当然图像没有显示出来，所以我确定问题是 Glide 代码。谁能帮我吗？
这是代码：
Glide.with(context)
.asBitmap()
.load(contacts.get(position).getimgurl())
.into(holder.image);
这是LOGCAT所说的：
2020-10-28 22:48:26.776 413-413/? E/netmgr: qemu_pipe_open_ns:62: Could not connect to the 'pipe:qemud:network' service: Invalid argument
2020-10-28 22:48:26.776 413-413/? E/netmgr: Failed to open QEMU pipe 'qemud:network': Invalid argument
2020-10-28 22:48:29.441 415-415/? E/wifi_forwarder: qemu_pipe_open_ns:62: Could not connect to the 'pipe:qemud:wififorward' service: Invalid argument
2020-10-28 22:48:29.441 415-415/? E/wifi_forwarder: RemoteConnection Failed to initialize: RemoteConnection Failed to open pipe
更多错误：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.recyclerviewexample,PID: 8594
java.lang.NullPointerException: Argument must not be null
at com.bumptech.glide.util.Preconditions.checkNotNull(Preconditions.java:29)
at com.bumptech.glide.util.Preconditions.checkNotNull(Preconditions.java:23)
at com.bumptech.glide.RequestBuilder.into(RequestBuilder.java:669)
at com.example.recyclerviewexample.ContactsRecViewAdapter.onBindViewHolder(ContactsRecViewAdapter.java:74)
at com.example.recyclerviewexample.ContactsRecViewAdapter.onBindViewHolder(ContactsRecViewAdapter.java:26)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7065)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7107)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:6012)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6279)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6118)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6114)
at androidx.recyclerview.widget.linearlayoutmanager$LayoutState.next(linearlayoutmanager.java:2303)
at androidx.recyclerview.widget.linearlayoutmanager.layoutChunk(linearlayoutmanager.java:1627)
at androidx.recyclerview.widget.linearlayoutmanager.fill(linearlayoutmanager.java:1587)
at androidx.recyclerview.widget.linearlayoutmanager.onLayoutChildren(linearlayoutmanager.java:665)
at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:4134)
at androidx.recyclerview.widget.RecyclerView.onMeasure(RecyclerView.java:3540)
at android.view.View.measure(View.java:25466)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:735)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:481)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:146)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at androidx.appcompat.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:490)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:25466)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6957)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:747)
at android.view.View.measure(View.java:25466)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:3397)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:2228)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2486)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1952)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8171)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:972)
at android.view.Choreographer.doCallbacks(Choreographer.java:796)
at android.view.Choreographer.doFrame(Choreographer.java:731)
at android.view.Choreographer$FramedisplayEventReceiver.run(Choreographer.java:957)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime: at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
这也是该视频的链接：documentation在10:03:50
解决方法
有一种方法可以在Glide中捕获错误：
private RequestListener<Bitmap> requestListener = new RequestListener<Bitmap>() {
@Override
public boolean onLoadFailed(@Nullable GlideException e,Object model,Target<Bitmap> target,boolean isFirstResource) {
// todo log exception to central service or something like that
// important to return false so the error placeholder can be placed
return false;
}
@Override
public boolean onResourceReady(Bitmap resource,DataSource dataSource,boolean isFirstResource) {
// everything worked out,so probably nothing to do
return false;
}
};
然后将其添加到您的Glide版本中：
GlideApp
.with(context)
.asBitmap()
.load(yourImages)
.listener(requestListener)
.error(R.drawable.errorImage)
.into(imageViewPlaceholder);
通过这种方式，您可以调试并找出问题所在。