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如何在ListView项的视图上添加不同的OnClickListeners来执行不同的操作

onclick listview android

Stanislav Batura · 技术社区 · 6 年前

ListView 项目被单击?
换句话说,当你点击不同的视图时项目应用应执行其他操作。
在细节上,我有一个简单的 Book.java 类,该类包含一些书籍描述。
ListView<Book> 使用 BooksAdapter.class :

public class BooksAdapter extends ArrayAdapter<Book> {
    public BooksAdapter (Context context, List<Book> books) {
        super(context,0,books);
    }
    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {

//        ConstraintLayout constraintLayout = new ConstraintLayout();
//        constraintLayout.setVisibility();
        View listItemView = convertView;
        if (listItemView == null) {
            listItemView = LayoutInflater.from(getContext()).inflate(
                    R.layout.books_list_item, parent, false);
        }
        Book currentBook = getItem(position);
        ImageView coverView = (ImageView) listItemView.findViewById(R.id.preview_image_view);
        if (currentBook.getImage() == "No cover") {
            coverView.setImageResource(R.drawable.no_book_cover);
        } else {
            Picasso.get().load(currentBook.getImage()).into(coverView);
        }
        TextView authorTextView = (TextView)listItemView.findViewById(R.id.autor_text);
        authorTextView.setText(formatAuthor(currentBook.getAuthor(),currentBook.getDate()));
        TextView titleTextView = (TextView)listItemView.findViewById(R.id.title_text);
        titleTextView.setText(currentBook.getTitle());
        //TextView descrTextView = (TextView)listItemView.findViewById(R.id.description_text);
        //descrTextView.setText(currentBook.getDescription());
        return listItemView;
    }

    private String formatAuthor (String name,String date ) {
        name = name.substring(2,name.length()-2);
        date = date.substring(0,4);
        String fullString = name + ", " + date;
        return(fullString);
    }
}

books_list_item.xml :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/list_item"
        android:layout_width="match_parent"
        android:layout_height="120dp"
        android:orientation="horizontal"
        android:paddingEnd="16dp"
        android:paddingLeft="16dp"
        android:paddingRight="16dp"
        android:paddingStart="16dp"
        android:paddingBottom="16dp"
        android:paddingTop="8dp">
        <ImageView
            android:id="@+id/preview_image_view"
            android:layout_width="80dp"
            android:layout_height="match_parent" />
        <LinearLayout
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            android:orientation="vertical">
            <TextView
                android:id="@+id/autor_text"
                android:layout_width="match_parent"
                android:layout_height="40dp"
                android:maxLines="1"
                android:paddingLeft="8dp"
                android:paddingRight="8dp"
                android:paddingTop="8dp"
                android:textColor="@color/textColorPrimary"
                android:textSize="16sp" />
            <TextView
                android:id="@+id/title_text"
                android:layout_width="match_parent"
                android:layout_height="80dp"
                android:layout_gravity="center_vertical"
                android:maxLines="2"
                android:paddingLeft="8dp"
                android:paddingRight="8dp"
                android:paddingTop="0dp"
                android:textColor="@color/textColorLight"
                android:textSize="16sp" />
        </LinearLayout>
        <ImageView
            android:layout_width="40dp"
            android:layout_height="match_parent"
            android:src="@drawable/ic_info_black_24dp"
            android:scaleType="center"/>
    </LinearLayout>
    <View
        android:layout_width="match_parent"
        android:layout_height="0.5dp"
        android:background="@android:color/darker_gray"/>
</LinearLayout>

MainActivity.java 创建mAdapter并覆盖 setOnItemClickListener :

   ListView booksListView = (ListView) findViewById(R.id.list);
    mAdapter = new BooksAdapter(this, new ArrayList<Book>());
    booksListView.setAdapter(mAdapter);

    booksListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
            Book book = mAdapter.getItem(position);

            ad = new AlertDialog.Builder(BooksListActivity.this);
            ad.setTitle("Book description");
            ad.setMessage(book.getDescription());

            AlertDialog alert = ad.create();
            alert.show();
            //ad.create();
        }
    });

下面是一些一般性的问题 onClickListeners 不一样的 Views @+id/autor_text 和 @+id/title_text 例如)并在这些情况下执行不同的操作?

2 回复 | 直到 6 年前

Abhinav Suman 6 年前

在你的内心 getView() 方法集 onClickListener 完全不同 Views

通过实现此代码:-

authorTextView.setOnClickListener(this);
titleTextView.setOnClickListener(this);  

public void onClick(View v) {

      switch(v.getId()){  
           case R.id.authorTextView:  
                //code to be written to handle the click event
           break;

           case R.id.titleTextView: 
                //code to be written to handle the click event 
           break;
      }
    }
};

prashant17 OzanTabakoglu 6 年前

在你的内心 getView

    authorTextView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            //Do your action
        }
    });


    titleTextView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            //Do your action
        }
    });