我正在编写一个应用程序，用于解析来自网络的当前和计划的道路工程信息，并以列表格式显示它们。我创建了一个自定义适配器来创建列表项并将其添加到ListView。当我运行应用程序时，我收到运行时错误：
Java.lang.RuntimeException: Unable to start activity ComponentInfo{labstuff.gcu.me.org.roadworksscotland/labstuff.gcu.me.org.roadworksscotland.MainActivity}: android.view.InflateException: Binary XML file line #54: addView(View, LayoutParams) is not supported in AdapterView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: android.view.InflateException: Binary XML file line #54: addView(View, LayoutParams) is not supported in AdapterView
Caused by: java.lang.UnsupportedOperationException: addView(View, LayoutParams) is not supported in AdapterView
at android.widget.AdapterView.addView(AdapterView.java:495)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:862)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:861)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:861)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:292)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at labstuff.gcu.me.org.roadworksscotland.MainActivity.onCreate(MainActivity.java:33)
at android.app.Activity.performCreate(Activity.java:6679)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
这是我的MainActivity类，它使用异步任务来获取Web信息，以及通过在完成时调用attachAdapters（）方法将适配器创建并附加到ListViews。
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private int currentRoadworksCount;
private int plannedRoadworksCount;
private LinkedList<CurrentRoadwork> currentRoadworks;
private LinkedList<PlannedRoadwork> plannedRoadworks;
private Button currentRoadworksButton;
private Button plannedRoadworksButton;
private ViewSwitcher viewSwitcher;
private ListView currentRoadworksList;
private ListView plannedRoadworkdsList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.currentRoadworksButton = (Button)findViewById(R.id.currentRoadworksButton);
currentRoadworksButton.setOnClickListener(this);
this.plannedRoadworksButton = (Button)findViewById(R.id.plannedRoadworksButton);
plannedRoadworksButton.setOnClickListener(this);
this.viewSwitcher = (ViewSwitcher)findViewById(R.id.viewSwitcher);
this.currentRoadworksList = (ListView)findViewById(R.id.currentRoadworksList);
this.plannedRoadworkdsList = (ListView)findViewById(R.id.plannedRoadworksList);
new NetworkAsyncTask().execute();
}
private class NetworkAsyncTask extends AsyncTask<Void, Void, Void>
{
ApiReader reader;
@Override
protected void onPreExecute()
{
reader = new ApiReader();
currentRoadworks = new LinkedList<CurrentRoadwork>();
plannedRoadworks = new LinkedList<PlannedRoadwork>();
}
@Override
protected Void doInBackground(Void... params)
{
currentRoadworks = reader.parseCurrentRoadworks();
Log.e("Progress update", "Current roadworks loaded");
plannedRoadworks = reader.parsePlannedRoadworks();
Log.e("Progress update", "Planned roadworks loaded");
return null;
}
@Override
protected void onPostExecute(Void result)
{
super.onPostExecute(result);
currentRoadworksCount = currentRoadworks.size();
plannedRoadworksCount = plannedRoadworks.size();
currentRoadworksButton.setText(currentRoadworksButton.getText().toString()
+ "\n(" + currentRoadworksCount + " Events)");
plannedRoadworksButton.setText(plannedRoadworksButton.getText().toString()
+ "\n(" + plannedRoadworksCount + " Events)");
attachAdapters();
}
}
public void attachAdapters()
{
RoadworkAdapter currentRoadworkAdapter = new RoadworkAdapter(this, currentRoadworks);
currentRoadworksList.setAdapter(currentRoadworkAdapter);
RoadworkAdapter plannedRoadworkAdapter = new RoadworkAdapter(this, plannedRoadworks, "planned");
plannedRoadworkdsList.setAdapter(plannedRoadworkAdapter);
}
@Override
public void onClick(View v)
{
if (v == currentRoadworksButton)
{
currentRoadworksButton.setEnabled(false);
plannedRoadworksButton.setEnabled(true);
viewSwitcher.showNext();
}
else if (v == plannedRoadworksButton)
{
currentRoadworksButton.setEnabled(true);
plannedRoadworksButton.setEnabled(false);
viewSwitcher.showPrevious();
}
}
}
这是我的适配器类：
public class RoadworkAdapter extends BaseAdapter {
private Context mContext;
private LayoutInflater mInflater;
private LinkedList<CurrentRoadwork> currentRoadworksSource;
private LinkedList<PlannedRoadwork> plannedRoadworksSource;
private boolean current;
private boolean grey;
public RoadworkAdapter(Context context, LinkedList<CurrentRoadwork> currentRoadworks)
{
current = true;
mContext = context;
currentRoadworksSource = currentRoadworks;
plannedRoadworksSource = null;
mInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public RoadworkAdapter (Context context, LinkedList<PlannedRoadwork> plannedRoadworks, String planned)
{
current = false;
mContext = context;
plannedRoadworksSource = plannedRoadworks;
currentRoadworksSource = null;
mInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount()
{
if (current) return currentRoadworksSource.size();
else return plannedRoadworksSource.size();
}
@Override
public Object getItem(int position)
{
if (current) return currentRoadworksSource.get(position);
else return plannedRoadworksSource.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 = mInflater.inflate(R.layout.current_roadwork, parent,false);}
if (current)
{
if (rowView == null){ rowView = mInflater.inflate(R.layout.current_roadwork, parent,false);}
TextView titleView = (TextView) rowView.findViewById(R.id.row_title);
TextView date = (TextView) rowView.findViewById(R.id.row_date);
TextView description = (TextView) rowView.findViewById(R.id.row_description);
CurrentRoadwork roadwork = (CurrentRoadwork) getItem(position);
titleView.setText(roadwork.getTitle());
date.setText(roadwork.getStartDate().toString()
+ " to " + roadwork.getEndDate().toString());
description.setText(roadwork.getDescription());
if (grey)
{
rowView.setBackgroundColor(mContext.getResources().getColor(R.color.GhostWhite));
grey = false;
}
else
{
grey = true;
}
return rowView;
}
else
{
if (rowView == null){ rowView = mInflater.inflate(R.layout.planned_roadwork, parent,false);}
TextView titleView = (TextView) rowView.findViewById(R.id.row_title_planned);
TextView date = (TextView) rowView.findViewById(R.id.row_date_planned);
TextView description = (TextView) rowView.findViewById(R.id.row_description_planned);
PlannedRoadwork roadwork = (PlannedRoadwork) getItem(position);
titleView.setText(roadwork.getTitle());
date.setText(roadwork.getStartDate().toString()
+ " to " + roadwork.getEndDate().toString());
String descriptionString = roadwork.getDescription();
if (roadwork.getTrafficManagement() != null) descriptionString += " " + roadwork.getTrafficManagement();
if (roadwork.getDiversionInfo() != null) descriptionString += " " + roadwork.getDiversionInfo();
if (roadwork.getWorksInfo() != null) descriptionString += " " + roadwork.getWorksInfo();
description.setText(roadwork.getDescription());
if (grey)
{
rowView.setBackgroundColor(mContext.getResources().getColor(R.color.GhostWhite));
grey = false;
}
else
{
grey = true;
}
return rowView;
}
}
}
此类可用于计划的或当前的道路工程，这些道路工程略有不同，哪一个由布尔＆＃34;当前＆＃34;确定。为ActivityMain中的每个ListView创建了两个实例。 在SO上出现此错误的所有其他事件中，我发现似乎是因为列表项被夸大了，如
rowView = mInflater.inflate(R.layout.planned_roadwork, parent)
但是地雷似乎被正确编码为
rowView = mInflater.inflate(R.layout.planned_roadwork, parent,false)
任何想法在这里出了什么问题？