Question

我想找出原因，但我不确定。我看了看，我很肯定我输入的东西都是我想的。我将在下面发布我的代码。

适配器类：

public class MyAgendaAdapter extends BaseAdapter {
    ArrayList<Agenda> agendas = new ArrayList<Agenda>();

public MyAgendaAdapter() {
    agendas.add(new Agenda());
}

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

@Override
public Object getItem(int position) {
    return agendas.get(position);
}

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

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

    if(convertView == null) {
        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        convertView = inflater.inflate(R.layout.agenda, parent, false);
    }

    Agenda agenda = agendas.get(position); //get the agenda from the ArrayList

    TextView nameTextView = (TextView) convertView.findViewById(R.id.agenda_name);
    nameTextView.setText(agenda.getEvent());

    TextView timeTextView = (TextView) convertView.findViewById(R.id.agenda_time);
    timeTextView.setText(agenda.getTime());

    TextView locationTextView = (TextView) convertView.findViewById(R.id.agenda_location);
    locationTextView.setText(agenda.getLocation());



    return convertView;
     }

}

主要活动类：

public class MainDisplayActivity extends Activity {
    MyAgendaAdapter agendaAdapter;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    ListView list = (ListView) findViewById(R.id.agenda_list); 
    agendaAdapter = new MyAgendaAdapter();
    list.setAdapter(agendaAdapter);
    }

}

我省略了导入。假设我的布局和ID是正确的，有谁知道问题是什么？

编辑（logcat上的确切错误）：

05-27 17:29:54.839: W/dalvikvm(1065): threadid=1: thread exiting with uncaught exception(group=0x409c01f8)
05-27 17:29:54.860: E/AndroidRuntime(1065): FATAL EXCEPTION: main
05-27 17:29:54.860: E/AndroidRuntime(1065): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.zeroe/com.zeroe.MainDisplayActivity}: java.lang.UnsupportedOperationException: addView(View, LayoutParams) is not supported in AdapterView
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.app.ActivityThread.access$600(ActivityThread.java:123)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.os.Looper.loop(Looper.java:137)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.app.ActivityThread.main(ActivityThread.java:4424)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at java.lang.reflect.Method.invokeNative(Native Method)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at java.lang.reflect.Method.invoke(Method.java:511)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at dalvik.system.NativeStart.main(Native Method)
05-27 17:29:54.860: E/AndroidRuntime(1065): Caused by: java.lang.UnsupportedOperationException: addView(View, LayoutParams) is not supported in AdapterView
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.widget.AdapterView.addView(AdapterView.java:471)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:743)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:742)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:742)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.app.Activity.setContentView(Activity.java:1835)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at com.zeroe.MainDisplayActivity.onCreate(MainDisplayActivity.java:21)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.app.Activity.performCreate(Activity.java:4465)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
05-27 17:29:54.860: E/AndroidRuntime(1065):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
05-27 17:29:54.860: E/AndroidRuntime(1065):     ... 11 more

Answer 1

修改

所以在对话后编辑MyAgendaAdapter课程并按照以下方式编辑conctructor：

public MyAgendaAdapter(Context c) { this.context = c; agendas.add(new Agenda()); }

所以你会：

public class MyAgendaAdapter extends BaseAdapter { Context context; ArrayList<Agenda> agendas = new ArrayList<Agenda>(); public MyAgendaAdapter() { agendas.add(new Agenda()); } ...

然后将其添加到您的getView方法

LayoutInflater inflater = LayoutInflater.from(context); if(convertView == null) { convertView = inflater.inflate(R.layout.agenda, null); }

然后你会这样打电话：

ListView list = (ListView) findViewById(R.id.agenda_list); agendaAdapter = new MyAgendaAdapter(this); list.setAdapter(agendaAdapter);

然后告诉我。

内部类的替代方式：

public class MainDisplayActivity extends Activity { MyAgendaAdapter agendaAdapter; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ListView list = (ListView) findViewById(R.id.agenda_list); agendaAdapter = new MyAgendaAdapter(); list.setAdapter(agendaAdapter); } private class MyAgendaAdapter extends BaseAdapter { ArrayList<Agenda> agendas = new ArrayList<Agenda>(); public MyAgendaAdapter() { agendas.add(new Agenda()); } @Override public int getCount() { return agendas.size(); } @Override public Object getItem(int position) { return agendas.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { LayoutInflater inflater = getLayoutInflater(); if(convertView == null) { convertView = inflater.inflate(R.layout.agenda, null); } Agenda agenda = agendas.get(position); //get the agenda from the ArrayList TextView nameTextView = (TextView) convertView.findViewById(R.id.agenda_name); nameTextView.setText(agenda.getEvent()); TextView timeTextView = (TextView) convertView.findViewById(R.id.agenda_time); timeTextView.setText(agenda.getTime()); TextView locationTextView = (TextView) convertView.findViewById(R.id.agenda_location); locationTextView.setText(agenda.getLocation()); return convertView; } } }

我的ListView的适配器给我这个错误：UnsupportedOperationException：AdapterView不支持addView（View，LayoutParams）

1 个答案: