Android Studio 实验四：手机通讯录（ListView的应用）

目录

activity_main.xml

FruitAdapter

Fruit类

fruit_item.xml

Activity

运行截图

项目文件

---

activity_main.xml

FruitAdapter

（虽然是通讯录，但是因为书上是拿水果举的例子，所以文件的命名也就照搬了）在包内创建一个Java类并命名为FruitAdapter，输入代码如下：

public class FruitAdapter extends ArrayAdapter {

    private int resouceId;

    public FruitAdapter(Context context, int textViewResourceId, List objects) {
        super(context, textViewResourceId, objects);
        resouceId = textViewResourceId;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        Fruit fruit = getItem(position);

        View view;
        if (convertView == null) {
            view = LayoutInflater.from(getContext()).inflate(resouceId,parent,false);
        } else {
            view = convertView;
        }

        ImageView fruitImage = (ImageView) view.findViewById(R.id.fruit_image);
        TextView fruitName = (TextView) view.findViewById(R.id.fruit_name);
        fruitImage.setImageResource(fruit.getImageId());
        fruitName.setText(fruit.getName());
        return view;

    }

}

Fruit类

在包里创建Java类并命名为Fruit，代码如下：

public class Fruit {
    private String name;
    private int imageId;

    public Fruit(String name, int imageId) {
        this.name = name;
        this.imageId = imageId;
    }

    public String getName() {
        return name;
    }

    public int getImageId() {
        return  imageId;
    }
}

fruit_item.xml

 创建layout文件并命名为fruit_item，代码如下：

Activity

public class MainActivity extends AppCompatActivity {

    private List fruitList = new ArrayList<>();

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

        initFruits();//初始化水果数据
        FruitAdapter adapter = new FruitAdapter(MainActivity.this,
                R.layout.fruit_item,fruitList);
        ListView listView = (ListView) findViewById(R.id.list_view);
        listView.setAdapter(adapter);

    }


//对图片进行加载，图片放在mian/res/drawable里面
    private void initFruits() {
        for(int i=0; i < 3; i++) {
            Fruit apple = new Fruit("周杰伦",R.drawable.image04);
            fruitList.add(apple);
            Fruit banana = new Fruit("哆啦",R.drawable.image02);
            fruitList.add(banana);
            Fruit orange = new Fruit("天皇",R.drawable.image03);
            fruitList.add(orange);
        }
    }
}

 

运行截图

  

项目文件

AndroidStudio实验四：手机通讯录（ListView的应用）-Android文档类资源-CSDN下载AndroidStudio实验四：手机通讯录（ListView的应用）更多下载资源、学习资料请访问CSDN下载频道.https://download.csdn.net/download/nazonomaster/85219538