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私は初心者です。asyncTask でリストビューを表示したいので、このコードがありますが、以下の行でこれがどのように間違っているのかわかりません:

ListAdapter adapter =new SimpleAdapter(this, result,android.R.layout.simple_list_item_1, new String[] {"planet"}, new int[] {android.R.id.text1});

直してもらえますか?

私のコード:

 public class MainActivity extends Activity {
    List<Map<String, String>> planetsList;
    ListAdapter simpleAdpt;
    ListView lv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lv=(ListView) this.findViewById(R.id.listView1);
        planetsList = new ArrayList<Map<String,String>>();

        initList();
        simpleAdpt = new SimpleAdapter(this, planetsList, android.R.layout.simple_list_item_1, new String[] {"planet"}, new int[] {android.R.id.text1});

        lv.setAdapter(simpleAdpt);
    }


     private void initList() {
            // We populate the planets into planetslist

            planetsList.add(createPlanet("planet", "Mercury"));
            planetsList.add(createPlanet("planet", "Venus"));
            planetsList.add(createPlanet("planet", "Mars"));
            planetsList.add(createPlanet("planet", "Jupiter"));
            planetsList.add(createPlanet("planet", "Saturn"));
            planetsList.add(createPlanet("planet", "Uranus"));
            planetsList.add(createPlanet("planet", "Neptune"));

    }

     private HashMap<String, String> createPlanet(String key, String name) {
            HashMap<String, String> planet = new HashMap<String, String>();
            planet.put(key, name);

            return planet;
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}
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