Question

我正在使用converflow布局按照给定库https://github.com/moondroid/CoverFlow中的说明进行操作它按照我的方式推出时完全没问题，但问题是当我点击屏幕时，应用程序崩溃在棒棒糖设备中观察到

＆lt; ---- mainactivity ----＆gt;

CoverFlowAdapter adapter = new CoverFlowAdapter(this);

FeatureCoverFlow featureCoverFlow = (FeatureCoverFlow) findViewById(R.id.coverflow);

featureCoverFlow.setAdapter(adapter);

＆lt; - xml used - ＆gt;

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    xmlns:coverflow="http://schemas.android.com/apk/res-auto">

    <it.moondroid.coverflow.components.ui.containers.FeatureCoverFlow
        android:id="@+id/coverflow"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        coverflow:coverHeight="150dp"
        coverflow:coverWidth="150dp"
        coverflow:maxScaleFactor="1.5"
        coverflow:reflectionGap="0px"
        coverflow:rotationThreshold="0.5"
        coverflow:scalingThreshold="0.5"
        coverflow:spacing="0.6" />

</LinearLayout>

＆lt; - CoverFlowAdapter - ＆gt;

public class CoverFlowAdapter extends BaseAdapter {
    private final ArrayList<String> mListString;
    private LayoutInflater mLayoutInflator;

    public CoverFlowAdapter(MainActivity activity) {
        mLayoutInflator = LayoutInflater.from(activity);
        mListString = new ArrayList<>();
        mListString.add("one");
        mListString.add("two");
        mListString.add("three");
        mListString.add("four");
        mListString.add("five");

    }

    @Override
    public int getCount() {
        return mListString.size();
    }

    @Override
    public String getItem(int position) {
        return mListString.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

            View rowView = convertView;
            if (rowView == null) {
                rowView = mLayoutInflator.inflate(R.layout.cover_flow_item,
                        parent, false);

                ViewHolder viewHolder = new ViewHolder();
                viewHolder.text = (TextView) rowView.findViewById(R.id.label);
                rowView.setTag(viewHolder);
            }

            ViewHolder holder = (ViewHolder) rowView.getTag();
            holder.text.setText(mListString.get(position));

        return rowView ;
    }

    static class ViewHolder {
        public TextView text;

    }
}

＆lt; ---将错误视为 - ＆gt;

java.lang.NullPointerException：尝试从字段中读取＆＃39; int android.view.View.mViewFlags＆＃39;在null对象引用上在android.view.ViewGroup.canViewReceivePointerEvents（ViewGroup.java:2316）在android.view.ViewGroup.dispatchHoverEvent（ViewGroup.java:1581）在android.view.View.dispatchGenericMotionEvent（View.java:8552）在android.view.ViewGroup.dispatchTransformedGenericPointerEvent（ViewGroup.java:1919）在android.view.ViewGroup.dispatchHoverEvent（ViewGroup.java:1624）在android.view.View.dispatchGenericMotionEvent（View.java:8552）在android.view.ViewGroup.dispatchTransformedGenericPointerEvent（ViewGroup.java:1919）在android.view.ViewGroup.dispatchHoverEvent（ViewGroup.java:1624）在android.view.View.dispatchGenericMotionEvent（View.java:8552）在android.view.ViewGroup.dispatchTransformedGenericPointerEvent（ViewGroup.java:1919）在android.view.ViewGroup.dispatchHoverEvent（ViewGroup.java:1624）在android.view.View.dispatchGenericMotionEvent（View.java:8552）在android.view.ViewGroup.dispatchTransformedGenericPointerEvent（ViewGroup.java:1919）在android.view.ViewGroup.dispatchHoverEvent（ViewGroup.java:1624）在android.view.View.dispatchGenericMotionEvent（View.java:8552）在android.view.ViewGroup.dispatchTransformedGenericPointerEvent（ViewGroup.java:1919）在android.view.ViewGroup.dispatchHoverEvent（ViewGroup.java:1624）在android.view.View.dispatchGenericMotionEvent（View.java:8552）在android.view.ViewGroup.dispatchTransformedGenericPointerEvent（ViewGroup.java:1919）在android.view.ViewGroup.dispatchHoverEvent（ViewGroup.java:1624）在android.view.View.dispatchGenericMotionEvent（View.java:8552）在com.android.internal.policy.impl.PhoneWindow $ DecorView.superDispatchGenericMotionEvent（PhoneWindow.java:2377）在com.android.internal.policy.impl.PhoneWindow.superDispatchGenericMotionEvent（PhoneWindow.java:1729）在android.app.Activity.dispatchGenericMotionEvent（Activity.java:2778）在android.support.v7.view.WindowCallbackWrapper.dispatchGenericMotionEvent（WindowCallbackWrapper.java:70）在com.android.internal.policy.impl.PhoneWindow $ DecorView.dispatchGenericMotionEvent（PhoneWindow.java:2344）在android.view.View.dispatchPointerEvent（View.java:8668）在android.view.ViewRootImpl $ ViewPostImeInputStage.processPointerEvent（ViewRootImpl.java:4123）在android.view.ViewRootImpl $ ViewPostImeInputStage.onProcess（ViewRootImpl.java:3989）在android.view.ViewRootImpl $ InputStage.deliver（ViewRootImpl.java:3544）在android.view.ViewRootImpl $ InputStage.onDeliverToNext（ViewRootImpl.java:3597）在android.view.ViewRootImpl $ InputStage.forward（ViewRootImpl.java:3563）在android.view.ViewRootImpl $ AsyncInputStage.forward（ViewRootImpl.java:3680）在android.view.ViewRootImpl $ InputStage.apply（ViewRootImpl.java:3571）在android.view.ViewRootImpl $ AsyncInputStage.apply（ViewRootImpl.java:3737）在android.view.ViewRootImpl $ InputStage.deliver（ViewRootImpl.java:3544）在android.view.ViewRootImpl $ InputStage.onDeliverToNext（ViewRootImpl.java:3597）在android.view.ViewRootImpl $ InputStage.forward（ViewRootImpl.java:3563）在android.view.ViewRootImpl $ InputStage.apply（ViewRootImpl.java:3571）在android.view.ViewRootImpl $ InputStage.deliver（ViewRootImpl.java:3544）在android.view.ViewRootImpl.deliverInputEvent（ViewRootImpl.java:5807）在android.view.ViewRootImpl.doProcessInputEvents（ViewRootImpl.java:5781）在android.view.ViewRootImpl.enqueueInputEvent（ViewRootImpl.java:5752）在android.view.ViewRootImpl $ WindowInputEventReceiver.onInputEvent（ViewRootImpl.java:5897）在android.view.InputEventReceiver.dispatchInputEvent（InputEventReceiver.java:185）在android.os.MessageQueue.nativePollOnce（本机方法）在android.os.MessageQueue.next（MessageQueue.java:143）在android.os.Looper.loop（Looper.java:122）在android.app.ActivityThread.main（ActivityThread.java:5254） at java.lang.reflect.Method.invoke（Native Method）在java.lang.reflect.Method.invoke（Method.java:372）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:903）在com.android.internal.os.ZygoteInit.m

Coverflow示例

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