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我在recyclerview适配器中充气我的布局xml。但我每次都碰到一个NPE，似乎无法找到问题的根源。onBindViewHolder找不到视图
这里是我的logcat：
E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.NullPointerException
at com.softtech.stevekamau.buyathome.adapter.RecomGridAdapter.onBindViewHolder(RecomGridAdapter.java:159)
at com.softtech.stevekamau.buyathome.adapter.RecomGridAdapter.onBindViewHolder(RecomGridAdapter.java:120)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:5217)
at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:5250)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4487)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4363)
at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1961)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1370)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1333)
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:562)
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2900)
at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3071)
at android.view.View.layout(View.java:13754)
at android.view.ViewGroup.layout(ViewGroup.java:4362)
.......而且我的适配器：
public class RecomGridAdapter extends RecyclerView.Adapter<RecomGridAdapter.ViewHolder> {
private List<NewModel> modelItems;
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class ViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public TextView mTextView;
public ViewHolder(View v) {
super(v);
mTextView = (TextView) v.findViewById(R.id.name);
}
}
// Provide a suitable constructor (depends on the kind of dataset)
public RecomGridAdapter(List<NewModel> modelItems) {
this.modelItems = modelItems;
}
// Create new views (invoked by the layout manager)
@Override
public RecomGridAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.grid_cell, parent, false);
// set the view's size, margins, paddings and layout parameters
return new ViewHolder(v);
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
// - get element from your dataset at this position
// - replace the contents of the view with that element
NewModel m = modelItems.get(position);
holder.mTextView.setText(m.getName());
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return modelItems.size();
}
}而且我grid_cell.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:foobar="http://schemas.android.com/apk/res-auto"
android:layout_width="118dp"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp">
<android.support.v7.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/list_row_selector"
card_view:cardCornerRadius="3dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.android.volley.toolbox.NetworkImageView
android:id="@+id/thumbnail"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_centerHorizontal="true"
android:layout_margin="5dp"
android:scaleType="centerCrop"
android:src="@drawable/loading4" />
<RelativeLayout
android:layout_width="110dp"
android:layout_height="60dp">
<ImageView
android:id="@+id/options"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignParentRight="true"
android:src="@drawable/options" />
<com.ctrlplusz.anytextview.AnyTextView
android:id="@+id/title"
android:layout_width="70dp"
android:layout_height="35dp"
android:ellipsize="end"
android:ems="10"
android:gravity="start"
android:maxLines="2"
android:paddingLeft="5dp"
android:text="Samsungf usb cablexvndvnsddvjdbv"
android:textSize="14dp"
android:textStyle="bold"
foobar:typeface="Gudea-Regular.ttf" />
<com.ctrlplusz.anytextview.AnyTextView
android:id="@+id/amount"
android:layout_width="110dp"
android:layout_height="wrap_content"
android:layout_below="@+id/title"
android:ellipsize="end"
android:ems="10"
android:paddingLeft="5dp"
android:singleLine="true"
android:text="10000000000"
android:textColor="#cf5862"
android:textSize="18dp"
foobar:typeface="Gudea-Bold.ttf" />
</RelativeLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>的logcat的建议，这条线：
holder.mTextView.setText(m.getName());
是我的异常发生。 而m.getName()肯定不是空或者甚至是问题，因为我试过holder.mTextView.setText("Test");。
任何想法究竟发生了什么？
的可能的复制（http://stackoverflow.com/questions/218384 /什么，是一个无效指针异常和如何-DO-I-FIX-IT） – 0X0nosugar