在Android应用程序中扩充异常 - ListView

Question

我是初学者，完全失去了尝试解决Inflate Exception的问题。我有一个线索，即Inflate Exception是由bean类的序列化引起的，然而，这一切如何协同工作是我无法理解的。

logcat如下所示，请注意，一旦我打开一个包含ListView的对话框就会发生这种情况，而ListView又基于我所讨论的bean类：

01-31 12:59:22.628 27314-27314/com... I/AppCompatDelegate: The Activity's LayoutInflater already has a Factory installed so we can not install AppCompat's
01-31 12:59:22.638 27314-27314/com... D/AndroidRuntime: Shutting down VM
01-31 12:59:26.642 27314-27314/com... W/GAv4: syncDispatchLocalHits timed out: java.util.concurrent.TimeoutException
01-31 12:59:26.647 27314-27314/com... E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com..., PID: 27314
    android.view.InflateException: Binary XML file line #38: Binary XML file line #38: Error inflating class item
        at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at com...ui.VideoPickerArrayAdapter.getView(VideoPickerArrayAdapter.java:45)
        at android.widget.AbsListView.obtainView(AbsListView.java:2346)
        at android.widget.ListView.measureHeightOfChildren(ListView.java:1281)
        at android.widget.ListView.onMeasure(ListView.java:1188)
        at android.view.View.measure(View.java:18794)
        at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)
        at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)
        at android.view.View.measure(View.java:18794)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
        at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
        at android.view.View.measure(View.java:18794)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
        at android.view.View.measure(View.java:18794)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
        at android.view.View.measure(View.java:18794)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
        at android.view.View.measure(View.java:18794)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
        at com.android.internal.policy.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2643)
        at android.view.View.measure(View.java:18794)
        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2100)
        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1191)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1452)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
        at android.view.Choreographer.doCallbacks(Choreographer.java:670)
        at android.view.Choreographer.doFrame(Choreographer.java:606)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:148)
        at android.app.ActivityThread.main(ActivityThread.java:5417)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
     Caused by: android.view.InflateException: Binary XML file line #38: Error inflating class item
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:776)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
        at com...ui.VideoPickerArrayAdapter.getView(VideoPickerArrayAdapter.java:45) 
        at android.widget.AbsListView.obtainView(AbsListView.java:2346) 
        at android.widget.ListView.measureHeightOfChildren(ListView.java:1281) 
        at android.widget.ListView.onMeasure(ListView.java:1188) 
        at android.view.View.measure(View.java:18794) 
        at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715) 
        at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461) 
        at android.view.View.measure(View.java:18794) 
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951) 
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:194) 
        at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135) 
        at android.view.View.measure(View.java:18794) 
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951) 
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465) 
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:748) 
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:630) 
        at android.view.View.measure(View.java:18794) 
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951) 
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:194) 
        at android.view.View.measure(View.java:18794) 
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951) 
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465) 
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:748) 
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:630) 
        at android.view.View.measure(View.java:18794) 
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5951) 
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:194) 
        at com.android.internal.policy.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2643) 
        at android.view.View.measure(View.java:18794) 
        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2100) 
        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1191) 
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1452) 
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107) 
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013) 
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858) 
        at android.view.Choreographer.doCallbacks(Choreographer.java:670) 
        at android.view.Choreographer.doFrame(Choreographer.java:606) 
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844) 
        at android.os.Handler.handleCallback(Handler.java:739) 
        at android.os.Handler.dispatchMessage(Handler.java:95) 
        at android.os.Looper.loop(Looper.java:148) 
        at android.app.ActivityThread.main(ActivityThread.java:5417) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
     Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.item" on path: DexPathList (...)

首先，我有上面提到的bean类Media.java：

public class Media implements Parcelable {
    private String duration;
    private String title;
    private URL url;
    private String contentType;
    private Bitmap thumbnail;
    private String resolution;
    private String bandwidth;

public Media(Parcel parcel) throws MalformedURLException {
    this.duration = parcel.readString();
    this.title = parcel.readString();
    this.url = new URL(parcel.readString());
    this.contentType = parcel.readString();
    this.thumbnail = parcel.readParcelable(Bitmap.class.getClassLoader());
    this.resolution = parcel.readString();
    this.bandwidth = parcel.readString();
}

/* ... */

@Override
public int describeContents() {
    return 0;
}

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeString(duration);
    dest.writeString(title);
    dest.writeString(url.toString());
    dest.writeString(contentType);
    dest.writeValue(thumbnail);
    dest.writeString(resolution);
    dest.writeString(bandwidth);
}

public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
    public Media createFromParcel(Parcel in) {
        try {
            return new Media(in);
        } catch (MalformedURLException e) {
            e.printStackTrace();
            return null;
        }
    }

    public Media[] newArray(int size) {
        return new Media[size];
    }
};
}

此ArrayAdapter中出现Inflate异常：

public class VideoPickerArrayAdapter extends ArrayAdapter<Media> {
public VideoPickerArrayAdapter(Context context, int resource, List<Media> items) {
    super(context, resource, items);
}

private class ViewHolder {
    ImageView imageView;
    TextView txtResolution;
    TextView txtDuration;
    Button btShare;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder = null;
    final Media media = getItem(position);

    LayoutInflater mInflater = (LayoutInflater) getContext().getSystemService(Activity.LAYOUT_INFLATER_SERVICE);

    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.video_picker_list_item, null);
        holder = new ViewHolder();
        holder.imageView = (ImageView) convertView.findViewById(R.id.itemicon);
        holder.txtResolution = (TextView) convertView.findViewById(R.id.itemresolution);
        holder.txtDuration = (TextView) convertView.findViewById(R.id.itemduration);
        holder.btShare = (Button) convertView.findViewById(R.id.ShareButton);
        convertView.setTag(holder);
    } else
        holder = (ViewHolder) convertView.getTag();

    holder.txtResolution.setText(media.getResolution() + "p@" + media.getBandwidth() + " Mb/s");
    holder.txtDuration.setText(media.getDurationString());
    holder.imageView.setImageBitmap(media.getThumbnail());

    /* Share button */
    holder.btShare.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent shareIntent = new Intent();
            shareIntent.setAction(Intent.ACTION_SEND);
            shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse(media.getUrl().toString()));
            shareIntent.setType("video/mp4");
            getContext().startActivity(Intent.createChooser(shareIntent, "Share to"));
        }
    });

    return convertView;
}

listview的XML布局（video_picker_list_item.xml）如下所示，请注意stacktrace中提到的第38行是Share按钮。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/itemicon"
        android:layout_width="90dp"
        android:layout_height="90dp"
        android:layout_marginBottom="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginTop="8dp"
        android:contentDescription="Videothumbnail"
        android:scaleType="centerCrop" />

    <TextView
        android:id="@+id/itemresolution"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:paddingTop="8dp"
        android:paddingRight="8dp"
    />

    <TextView
        android:id="@+id/itemduration"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:paddingRight="8dp"
        android:paddingBottom="8dp"
        android:paddingLeft="8dp"
        android:layout_below="@+id/itemresolution"
        android:textAlignment="textEnd"
        android:gravity="end"/>

    <Button
        android:id="@+id/ShareButton"
        android:title="Share"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:layout_below="@+id/itemduration"
        android:layout_toRightOf="@+id/itemicon"
        android:layout_toEndOf="@+id/itemicon"
        android:text="Share"/>

</RelativeLayout>

在使Media类Parcelable之前，我不会在每次打开对话框时都获得Inflate异常，但它仍然会像看似随机一样，每次我将一些Media添加到列表中然后打开对话框。我知道，一旦我能够显示列表，膨胀异常就不会发生，即使我关闭并再次打开对话框，除非我改变了它的内容。但是，在我按下分享按钮3秒后，应用程序仍然会崩溃，例外情况是“无法编组Media @ fdsg94934＆＃39;”。我尝试通过使Media Parcelable来修复此错误，但现在每次尝试打开对话框时我都会遇到Inflate异常。

我希望有经验的Android开发人员能够理解这些东西是如何协同工作的。