Java 在这种情况下,如何将元素添加到ArrayList
我正在运行下面的代码,但没有发生。我怎么能做对呢Java 在这种情况下,如何将元素添加到ArrayList,java,android-studio,arraylist,Java,Android Studio,Arraylist,我正在运行下面的代码,但没有发生。我怎么能做对呢 public class MainActivity extends AppCompatActivity { LocationManager locationManager; LocationListener locationListener; List<String> memorablePlaces; ListView listView; } @Override protected vo
public class MainActivity extends AppCompatActivity {
LocationManager locationManager;
LocationListener locationListener;
List<String> memorablePlaces;
ListView listView;
}
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = findViewById(R.id.memorablePlaces);
memorablePlaces = new ArrayList<>();
memorablePlaces.add("Add a place");
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<>(this,android.R.layout.simple_list_item_1);
listView.setAdapter(arrayAdapter);
}
public类MainActivity扩展了AppCompatActivity{
地点经理地点经理;
LocationListener LocationListener;
列出值得纪念的地点;
列表视图列表视图;
}
@凌驾
创建时受保护的void(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView=findViewById(R.id.可记忆位置);
memorablePlaces=newarraylist();
可记忆地点。添加(“添加地点”);
ArrayAdapter ArrayAdapter=新的ArrayAdapter(这是android.R.layout.simple\u list\u item\u 1);
setAdapter(arrayAdapter);
}
将列表传递给适配器:
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<>(this,android.R.layout.simple_list_item_1, memorablePlaces);
ArrayAdapter ArrayAdapter=新的ArrayAdapter(这是android.R.layout.simple\u list\u item\u 1,memorablePlaces);
将列表传递给适配器:
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<>(this,android.R.layout.simple_list_item_1, memorablePlaces);
ArrayAdapter ArrayAdapter=新的ArrayAdapter(这是android.R.layout.simple\u list\u item\u 1,memorablePlaces);
TX!我错过了一些东西!我错过了一些东西