ListView的简单使用

Posted 2020-10-06

简单来说，ListView简单是一个可以垂直滚动的列表控件。

ListView的简单使用：

在布局中加入ListView控件，并为ListView制定一个id，具体代码如下：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    <ListView
        android:id="@+id/list_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        />

</LinearLayout>

然后通过ListView的实例化和适配器的构建以及数据的传入来实现滚动列表ListView：

public class MainActivity extends AppCompatActivity {
    private String[] data = {"Apple","Banana","Orange","Watermelon","pear","Grape","Pineapple","Strawberry","Cherry","Mango",
            "Apple","Banana","Orange","Watermelon","pear","Grape","Pineapple","Strawberry","Cherry","Mango"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ListView listView = (ListView) findViewById(R.id.list_view);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_1,data);
        listView.setAdapter(adapter);
    }
}

如何想要实现列表数据的单选和多选模式：
多选模式：
public class MainActivity extends AppCompatActivity {

    private String[] data = {"Apple","Banana","Orange","Watermelon","pear","Grape","Pineapple","Strawberry","Cherry","Mango",
            "Apple","Banana","Orange","Watermelon","pear","Grape","Pineapple","Strawberry","Cherry","Mango"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ListView listView = (ListView) findViewById(R.id.list_view);
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_multiple_choice,data);
        listView.setAdapter(adapter);

    }
}
单选模式：

public class MainActivity extends AppCompatActivity {
    private String[] data = {"Apple","Banana","Orange","Watermelon","pear","Grape","Pineapple","Strawberry","Cherry","Mango",
            "Apple","Banana","Orange","Watermelon","pear","Grape","Pineapple","Strawberry","Cherry","Mango"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ListView listView = (ListView) findViewById(R.id.list_view);
        listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_single_choice,data);
        listView.setAdapter(adapter);
    }
}