唉 调皮的ListView

唉 调皮的ListView

本次任务是

运用LisTView和自定义Adapter

来实现资料以列表的形式展现

来看代码

---

布局代码老规矩 直接贴上

   <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/show"
        android:orientation="vertical">

    </LinearLayout>

<ImageView
        android:id="@+id/list_img"
        android:src="@drawable/img1"
        android:layout_width="76dp"
        android:layout_height="89dp" />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <TextView
            android:id="@+id/list_name"
            android:hint="name"
            android:textSize="30sp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

        <TextView
            android:id="@+id/list_age"
            android:hint="age"
            android:textSize="30sp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/list_hobby"
            android:hint="hobby"
            android:textSize="30sp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    
    </LinearLayout>

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

以上是三个界面的布局代码

布局代码都长得差不多 也就不上图了 啦啦啦

---

然后是主界面的Java代码

来看看Java代码

将对象的属性进行封装，给每个属性设置getter/setter方法

public class NameInfo {
    private String name;
    private String age;
    private String hobby;
    private int imgId;

    public NameInfo( int imgId,String name, String age, String hobby) {
        this.name = name;
        this.age = age;
        this.hobby = hobby;
        this.imgId = imgId;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

   ......等等 同上种方法

    public InfoAdapter(Context context, List datas) {
        this.datas = datas;
        this.context = context;
    }
    @Override
    public int getCount() {
        return datas.size();//一定要返回list长度！！！！
    }

    @Override
    public Object getItem(int i) {
        return datas.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        if(view == null){
            view = LayoutInflater.from(context).inflate(R.layout.item,null);
        }
     
        ImageView img = (ImageView)view.findViewById(R.id.list_img);
        TextView name =(TextView) view.findViewById(R.id.list_name);
        TextView age = (TextView)view.findViewById(R.id.list_age);
        TextView hobby = (TextView)view.findViewById(R.id.list_hobby);
    
    
        NameInfo nameminfo = datas.get(i);
        img.setImageResource(nameinfo.getImgId());
        name.setText(nameinfo.getName());
        age.setText(nameinfo.getAge());
        hobby.setText(nameinfo.getHobby());
    

        return view;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        FragmentManager manager = getFragmentManager() ;
        transction = manager.beginTransaction();
        if(adapterFragment ==null){
            adapterFragment = new AdapterFragment();
            transction.add(R.id.show,adapterFragment);
        }
        transction.replace(R.id.show,adapterFragment);
        transction.commit();
    }

上面这段代码 有点难 Java里的代码每次都折磨我老半天

可能我还有些驾驭不了它

一定要想办法搞定他...

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        View view =inflater.inflate(R.layout.fragment_adapter,container,false);
        List<NameInfo> datas = new ArrayList<>();
        datas.add(new NameInfo(R.drawable.img1,"杨洋","25","羊毛"));
        datas.add(new NameInfoe(R.drawable.img2,"黄子韬","24","羊毛"));
        datas.add(new NameInfo(R.drawable.img3,"郑爽","25","羊毛"));
        datas.add(new NameInfo(R.drawable.img4,"白敬亭","23","羊毛"));
        datas.add(new NameInfo(R.drawable.img5,"赵丽颖","28","羊毛"));

        InfoAdapter adapter = new InfoAdapter(getActivity(), datas);

        ListView listView = (ListView) view.findViewById(R.id.list_view);
        listView.setAdapter(adapter);
        return view;
    }

运行结果图如下