Android for Dummies代碼錯誤

Question

在Android應用程序開發傻瓜 ，我在最后一點代碼后得到一個錯誤。

對於ReminderListActivity類型，方法setListAdapter(ArrayAdapter<String>)未定義

代碼如下：

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

它看起來像Activity沒有setListAdapter()但它的子類ListActivity 。 也許你想要

public class ReminderListActivity extends ListActivity {

代替？ 這應該工作正常：

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);
  }
}

Answer 2

Activity沒有定義方法setListAdapter() 。 我想你想擴展ListActivity ：

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);
    }
}