Question

我正在创建一个ArrayAdapter的超级类，我在其中绑定从对象接收的数据并将它们放入TextViews。
代码并不复杂，我已经仔细检查了XML中所有TextView的ID。

我已经用相同的标题检查了所有其他问题在这种情况下，它们似乎都不起作用。

在下面附上我的代码。

public class EarthquakeAdapter extends ArrayAdapter<Earthquake> 
    {
        public EarthquakeAdapter(Context context, int resource) {
            super(context, resource);
        }
        public EarthquakeAdapter(Activity activity, ArrayList<Earthquake> Earthquakes)
        {
            super(activity,0, (List<Earthquake>) Earthquakes);
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            super.getView(position, convertView, parent);
            View ListItemView = convertView;
            if(ListItemView == null)
            {
                ListItemView = LayoutInflater.from(getContext()).inflate(
                    R.layout.earthquake_list_item, parent, false);
            }

            Earthquake currentItem = getItem(position);

            TextView magnitude = (TextView) 
            ListItemView.findViewById(R.id.magnitude);
            //Double m = ;
            magnitude.setText(""+currentItem.getmMag());

            TextView location = (TextView) ListItemView.findViewById(R.id.Location);
            location.setText(currentItem.getmLocation());

            TextView date = (TextView) ListItemView.findViewById(R.id.date);
            date.setText(currentItem.getmDate());

            return ListItemView;
        }

然后是xml文件。

    <?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:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="16dp"
    android:id="@+id/list_view_container">

    <TextView
        android:id="@+id/magnitude"
        android:layout_width="0dp"
        android:layout_height="60dp"
        android:layout_weight="1"
        tools:text="7.6"/>
    <TextView
        android:id="@+id/Location"
        android:layout_width="0dp"
        android:layout_height="60dp"
        android:layout_weight="1"
        tools:text="San Fransisco"/>
    <TextView
        android:id="@+id/date"
        android:layout_width="0dp"
        android:layout_height="60dp"
        android:layout_weight="1"
        tools:text="Date"/>

</LinearLayout>

这是我的地震班。

public class Earthquake 
     {
        private double mMag;
        private String mLocation;
        private String mDate;

        public Earthquake(double Mag, String Location, String Date){
            mMag = Mag;
            mLocation = Location;
            mDate = Date;
        }

        public String getmDate() {
            return mDate;
        }

        public double getmMag() {
            return mMag;
        }

        public String getmLocation() {

            return mLocation;
        }
    }

，这是错误日志。

06-11 20:38:36.570 9359-9359/com.example.android.quakereport W/ResourceType: No package identifier when getting value for resource number 0x00000000 06-11 20:38:36.571 9359-9359/com.example.android.quakereport D/AndroidRuntime: Shutting down VM 06-11 20:38:36.581 9359-9359/com.example.android.quakereport E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.android.quakereport, PID: 9359
   android.content.res.Resources$NotFoundException: Resource ID #0x0
       at android.content.res.Resources.getValue(Resources.java:1369)
       at android.content.res.MiuiResources.getValue(MiuiResources.java:145)
       at android.content.res.Resources.loadXmlResourceParser(Resources.java:2824)
       at android.content.res.Resources.getLayout(Resources.java:1183)
       at android.view.LayoutInflater.inflate(LayoutInflater.java:425)
       at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:378)
       at android.widget.ArrayAdapter.getView(ArrayAdapter.java:369)
       at com.example.android.quakereport.EarthquakeAdapter.getView(EarthquakeAdapter.java:28)
       at android.widget.AbsListView.obtainView(AbsListView.java:2346)
       at android.widget.ListView.makeAndAddView(ListView.java:1876)
       at android.widget.ListView.fillDown(ListView.java:702)
       at android.widget.ListView.fillFromTop(ListView.java:763)
       at android.widget.ListView.layoutChildren(ListView.java:1685)
       at android.widget.AbsListView.onLayout(AbsListView.java:2148)
       at android.view.View.layout(View.java:16653)
       at android.view.ViewGroup.layout(ViewGroup.java:5438)
       at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
       at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
       at android.view.View.layout(View.java:16653)
       at android.view.ViewGroup.layout(ViewGroup.java:5438)
       at android.support.v7.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:435)
       at android.view.View.layout(View.java:16653)
       at android.view.ViewGroup.layout(ViewGroup.java:5438)
       at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
       at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
       at android.view.View.layout(View.java:16653)
       at android.view.ViewGroup.layout(ViewGroup.java:5438)
       at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
       at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
       at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
       at android.view.View.layout(View.java:16653)
       at android.view.ViewGroup.layout(ViewGroup.java:5438)
       at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
       at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
       at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2680)
       at android.view.View.layout(View.java:16653)
       at android.view.ViewGroup.layout(ViewGroup.java:5438)
       at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2198)
       at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1958)
       at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1134)
       at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6045)
       at android.view.Choreographer$CallbackRecord.run(Choreographer.java:860)
       at android.view.Choreographer.doCallbacks(Choreographer.java:672)
       at android.view.Choreographer.doFrame(Choreographer.java:608)
       at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:846)
       at android.os.Handler.handleCallback(Handler.java:739)
       at android.os.Handler.dispatchMessage(Handler.java:95)
       at android.os.Looper.loop(Looper.java:148)
       at android.app.ActivityThread.main(ActivityThread.java:5441)
       at java.lang.reflect.Method.invoke(Native Method)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:738)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:628)

Answer 1

问题在于EarthquakeAdapter类的getView（）方法语句super.getView（）导致了一些问题。我删除了它，现在工作正常。

在问题本身中参考@MikeM的评论。

删除getView（）中的超级调用。你在三参数构造函数中传递了一个无效的布局资源ID - 当ArrayAdapter尝试对它进行膨胀时会导致异常 - 而且你还没有使用超级返回，因为你自己给布局充气了

Answer 2

我认为你需要修复你的构造函数。你只需要一个。

public class EarthquakeAdapter extends ArrayAdapter<Earthquake> {
    public EarthquakeAdapter(Context context, ArrayList<Earthquake> earthquakes) {
        super(context, 0, earthquakes);
    }

您不需要致电super.getView

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        final Earthquake earthquake = getItem(position);

        View v = convertView;
        if(v == null) {
            v = LayoutInflater.from(getContext()).inflate(
                R.layout.earthquake_list_item, parent, false);
        }

        return v;
    }

否则，您需要确定第28行发生的情况以及那里的零值。

您可以将此示例关注到define custom adapter

您可能需要清理并重建项目以重新生成资源。

Answer 3

试试这个

 Earthquake currentItem = new Earthquake(3.33,"someplace","05-05-05")
     currentItem=getItem(position);

取代

 Earthquake currentItem = get(position);        `//getItem(position);`

如果有效，则需要设置在Earthquake类中声明的变量的值

这可能会解决您的问题声明成员变量

Context ctx;
ArrayList<Earthquake> Earthquake;
    public EarthquakeAdapter(Activity activity, ArrayList<Earthquake> Earthquakes)
            {
               super(activity,0, (List<Earthquake>) Earthquakes);
               Ctx=activity;
               Earthquake=this.Earthquake; 
            }

现在你在做什么Earthquake currentItem = getItem(position); 这样做

Earthquake currentItem=Earthquake.get(position);     `//getItem(position);`

基本上你没有传递EarthquakeAdapter收到的值。

同时检查

    public Object getItem(int position) {
            return Earthquake.get(position);
        }
public int getCount() {
        return Earthquake.size();
    }
public long getItemId(int position) {
        return position;
    }

如果这不起作用，请显示您设置ArrayList<Earthquake>并调用适配器public EarthquakeAdapter(Activity activity, ArrayList<Earthquake> Earthquakes)的代码

android.content.res.Resources $ NotFoundException：资源ID＃0x0 Android错误

3 个答案: