java - Android傻瓜代码错误

Question

在傻瓜式 Android 应用程序开发中，我在最后一段代码后收到错误。

The method setListAdapter(ArrayAdapter<String>) is undefined for the type ReminderListActivity

代码如下:

package com.dummies.android.taskreminder;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;

public class ReminderListActivity extends Activity {
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.reminder_list);

    String[] items = new String[] { "Foo", "Bar", "Fizz", "Bin"};
    ArrayAdapter<String> adapter =
      new ArrayAdapter<String>(this, R.layout.reminder_row, R.id.text1, items);
    setListAdapter(adapter);
  }
}

Answer 1

在我看来就像 Activity没有 setListAdapter() 但它的子类 ListActivity做。也许你想要

public class ReminderListActivity extends ListActivity {

相反？这应该可以正常工作:

package com.dummies.android.taskreminder;

import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;

public class ReminderListActivity extends ListActivity {
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.reminder_list);

    String[] items = new String[] { "Foo", "Bar", "Fizz", "Bin"};
    ArrayAdapter<String> adapter =
      new ArrayAdapter<String>(this, R.layout.reminder_row, R.id.text1, items);
    setListAdapter(adapter);
  }
}