Question

我有方法show_list在将List添加到List并将适配器绑定到ArrayAdapter后，从某些字符串创建ListView。返回创建的ListView。如何将ListView添加到MainActivity并显示？

public class MainActivity extends AppCompatActivity {

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

    private View show_list() {
        String[] data = {"Ionut","Eugeniu","George","Felix","Fazlidin"};
        List<String> data_list = new ArrayList<>(Arrays.asList(data));
        ArrayAdapter<String> data_adapter = new ArrayAdapter<>(this,R.layout.list_item,data_list);
        ListView data_view = (ListView)this.findViewById(R.id.list_view);
        data_view.setAdapter(data_adapter);
        return data_view;
    }
}

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.ionut.vremea2.MainActivity">

    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/list_view" />
</RelativeLayout>

list_item.xml

<?xml version="1.0" encoding="utf-8"?>

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:text="Ionut"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/list_item" />

Answer 1

只需在show_list()

中拨打onCreate()即可

在MainActivity上显示ListView

1 个答案: