java - Android Studio无法识别 "setAdapter()"方法

Question

我一直在尝试了解如何填充 ListView 并为此尝试制作一个简单的应用程序，该应用程序采用字符串数组并将其放在 ListView 上。我创建了一个 ListView 对象“myListView”并尝试调用该对象的“setAdapter()”函数。但“setAdapter”部分变成红色，并给我一条错误消息: “无法解析符号'setAdapter'”

以下是MainActivity.java的源代码:

import android.app.Activity;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.AbsListView;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}

String[] myArray = {"biscuits", "laptops", "mice", "headphones", "macBook", "bottles", "something", "also something",
                    "this list is stupid", "and", "dumb", "and", "useless", "okay", "here it ends"};

    ListAdapter myListAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, myArray);

    ListView myListView = (ListView) findViewById(R.id.myListView);

    myListView.setAdapter(myListAdapter);
}

Answer 1

请删除 setContentView 之后的 } 并在代码末尾添加新的 }

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


String[] myArray = {"biscuits", "laptops", "mice", "headphones", "macBook", "bottles", "something", "also something",
                    "this list is stupid", "and", "dumb", "and", "useless", "okay", "here it ends"};

    ListAdapter myListAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, myArray);

    ListView myListView = (ListView) findViewById(R.id.myListView);

    myListView.setAdapter(myListAdapter);
}
}