Android Adapter适配器练习

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".SeekBar.ListViewTest1"
    android:orientation="vertical">

    <ListView
        android:id="@+id/listview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"></ListView>

</LinearLayout>

public class ListViewTest1 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list_view_test1);

        //要显示的数据
        String[] strs = {"Android","iOS","Java","Python","Ruby"};

        //创建ArrayAdapter
        //构造函数的参数，第一个是上下文对象，第二个是列表项的模板，第三个就是数组
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_expandable_list_item_1,strs);

        //获得ListView对象
        //通过调用setAdapter()方法为ListView设置Adapter适配器
        ListView listView = findViewById(R.id.listview);
        listView.setAdapter(adapter);
    }
}

```![在这里插入图片描述](https://img-blog.csdnimg.cn/87fdd44c56ba463fb2d01d67ce5372c7.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NjUwNzU1Nw==,size_16,color_FFFFFF,t_70#pic_center)