-1
的Java空指針異常==================這是我的片段：列表視圖崩潰的應用程序，在measureHeightOfChildren
public class ChooseAssigmentFragment extends Fragment {
private ListArrayAdapter listArrayAdapter;
private Assigment assigment;
private Assigments assigments;
private ListView assigList;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.assigments, null);
init(v);
assigments = new Assigments();
assigment = new Assigment("Nikon D700", "aisle 5, range 1m");
assigments.add(assigment); // daca comentez linia, atuncia functioneaza assigment.name si assigment.details nu is nule
loadAssigments(assigments);
return v;
}
private void init(View v) {
// TODO Auto-generated method stub
EditText assigSearchET = (EditText) v.findViewById(R.id.assigSearchET);
ImageButton assigSearcthIB = (ImageButton) v.findViewById(R.id.assigSearchIB);
assigList = (ListView) v.findViewById(R.id.assigListView);
assigList.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> assigList, View v, int position, long id) {
Assigment assigment = ((ListArrayAdapter) assigList.getAdapter()).getItem(position);
LogService.log(getTag(), "position: " + assigList.getAdapter().getItem(position));
}
});
}
private void loadAssigments(Assigments assigments) {
listArrayAdapter = new ListArrayAdapter(ChooseAssigmentFragment.this, assigments);
listArrayAdapter.notifyDataSetChanged();
assigList.setAdapter(listArrayAdapter);
}
}
======= =================這是我的ListView適配器：
public class ListArrayAdapter extends BaseAdapter implements Filterable {
private final LayoutInflater mInflater;
private ChooseAssigmentFragment chooseAssigmentFragment;
private Assigments assigments;
private Object mFilter;
public ListArrayAdapter(ChooseAssigmentFragment chooseAssigmentFragment, Assigments assigments) {
this.chooseAssigmentFragment = chooseAssigmentFragment;
this.assigments = assigments;
mInflater = LayoutInflater.from(chooseAssigmentFragment.getActivity());
}
public int getCount() {
return assigments.size();
}
public Assigment getItem(int position) {
return assigments.get(position);
}
public long getItemId(int position) {
return position;
}
public Assigment getAssigments(int i) {
return assigments.get(i);
}
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ItemFilter();
}
return (Filter) mFilter;
}
public View getView(int position, View convertView, ViewGroup parent) {
ListContent holder = null;
Assigment assigment = getAssigments(position);
if (convertView == null) {
convertView = mInflater.inflate(R.layout.row_layout_main_fragment, null);
holder = new ListContent();
holder.assigName = (TextView) convertView.findViewById(R.id.listItemName);
holder.assigDetails = (TextView) convertView.findViewById(R.id.listItemDetails);
convertView.setTag(holder);
} else {
holder = (ListContent) convertView.getTag();
}
holder.assigName.setText(assigment.name);
holder.assigDetails.setText(assigment.details);
return null;
}
private class ItemFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence prefix) {
return null;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
}
}
class ListContent {
TextView assigName;
TextView assigDetails;
}
}
=================我吹氣XML我的xml文件：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white"
android:orientation="vertical" >
<RelativeLayout
android:id="@+id/RelativeLayout2"
android:layout_width="match_parent"
android:layout_height="20dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="@color/SlateGray"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_gravity="center"
android:text="@string/sensor_conf" />
</RelativeLayout>
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="wrap_content"
android:layout_height="45dp"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_below="@+id/RelativeLayout2"
android:weightSum="8" >
<EditText
android:id="@+id/assigSearchET"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="7" >
<requestFocus />
</EditText>
<ImageButton
android:id="@+id/assigSearchIB"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.99"
android:background="@color/white"
android:src="@drawable/ic_action_search" />
</LinearLayout>
<ListView
android:id="@+id/assigListView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/linearLayout1"
android:layout_centerHorizontal="true" >
</ListView>
</RelativeLayout>
=================這是我的logcat給我：
12-06 11:35:54.156: E/AndroidRuntime(26171): FATAL EXCEPTION: main
12-06 11:35:54.156: E/AndroidRuntime(26171): java.lang.NullPointerException
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.AbsListView.obtainView(AbsListView.java:2048)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.ListView.measureHeightOfChildren(ListView.java:1216)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.ListView.onMeasure(ListView.java:1127)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.View.measure(View.java:8459)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.RelativeLayout.measureChild(RelativeLayout.java:566)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:381)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.View.measure(View.java:8459)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.View.measure(View.java:8459)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:581)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:365)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.View.measure(View.java:8459)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.LinearLayout.measureVertical(LinearLayout.java:386)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.View.measure(View.java:8459)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:581)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:365)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.View.measure(View.java:8459)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.View.measure(View.java:8459)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.View.measure(View.java:8459)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.ViewRoot.performTraversals(ViewRoot.java:864)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.view.ViewRoot.handleMessage(ViewRoot.java:1902)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.os.Handler.dispatchMessage(Handler.java:99)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.os.Looper.loop(Looper.java:130)
12-06 11:35:54.156: E/AndroidRuntime(26171): at android.app.ActivityThread.main(ActivityThread.java:3744)
12-06 11:35:54.156: E/AndroidRuntime(26171): at java.lang.reflect.Method.invokeNative(Native Method)
12-06 11:35:54.156: E/AndroidRuntime(26171): at java.lang.reflect.Method.invoke(Method.java:507)
12-06 11:35:54.156: E/AndroidRuntime(26171): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
12-06 11:35:54.156: E/AndroidRuntime(26171): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
12-06 11:35:54.156: E/AndroidRuntime(26171): at dalvik.system.NativeStart.main(Native Method)
我試圖改變片段XML，只包含該名單，試圖改變充氣的XML，但仍然沒有運氣。我沒有ideeas在我離開適配器