java - 我想为 viewpager 页面中的按钮设置一个 onClickListener

Question

我正在开发一个应用程序，它由一个只有 2 个页面的 View 分页器和每个页面中的 LinearLayout 组成。我想为这些线性布局设置点击监听器。

我使用 PagerAdapter 实现了 View 寻呼机。我试过了

view.findViewById(R.id.add_new_tut_btn).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
            Toast.makeText(context, "works", Toast.LENGTH_SHORT).show();
                }
            });

但是根本不起作用

HomePagerAdapter.java

public class HomePagerAdapter extends PagerAdapter {
    Context context;
    HomePagerAdapter(Context context){
        this.context = context;
    }

    @NonNull
    @Override
    public Object instantiateItem(@NonNull ViewGroup container, final int position) {
        final ModelObject modelObject = ModelObject.values()[position];
        LayoutInflater inflater = LayoutInflater.from(context);
        ViewGroup layout = (ViewGroup) inflater.inflate(modelObject.getLayoutResId(), container, false);
        View view = inflater.inflate( modelObject.getLayoutResId(), container, false);
        if ( position == 0) {
            view.findViewById(R.id.add_new_tut_btn).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Toast.makeText(context, "works", Toast.LENGTH_SHORT).show();
                }
            });
        }

        container.addView(layout);
        return layout;
    }

    @Override
    public void destroyItem(ViewGroup collection, int position, Object view) {
        collection.removeView((View) view);
    }

    @Override
    public int getCount() {
        return ModelObject.values().length;
    }

    @Override
    public boolean isViewFromObject(@NonNull View view, @NonNull Object object) {
        return view == object;
    }

    public enum ModelObject{
        HOME_PAGE("Home", R.layout.home_btns_layout),
        FILES_PAGE("Files", R.layout.files_download_layout);

        private int mLayoutResId;
        private String mTitleResId;

        ModelObject(String titleResId, int layoutResId) {
            mTitleResId = titleResId;
            mLayoutResId = layoutResId;
        }

        public String getTitleResId() {
            return mTitleResId;
        }

        public int getLayoutResId()
        {
            return mLayoutResId;
        }
    }

}

home_btns_layout.xml

<?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"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/files_view">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent">

        <LinearLayout
            android:id="@+id/add_new_tut_btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:layout_marginBottom="16dp"
            android:background="@drawable/st_home_btn_bg_1"
            android:gravity="center"
            android:orientation="vertical"
            android:padding="20dp"
            android:paddingStart="20dp"
            android:paddingEnd="20dp">


            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Find"
                android:textAlignment="center"
                android:textColor="#000" />
        </LinearLayout>

        <LinearLayout
            android:id="@+id/upcoming_tut_btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:layout_marginBottom="16dp"
            android:background="@drawable/st_home_btn_bg_1"
            android:gravity="center"
            android:orientation="vertical"
            android:padding="20dp"
            android:paddingStart="20dp"
            android:paddingEnd="20dp"
            android:layout_marginStart="10dp">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Upcoming"
                android:textAlignment="center"
                android:textColor="#000" />
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

files_download_layout.xml

<?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"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent">

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:layout_marginBottom="16dp"
            android:background="@drawable/st_home_btn_bg_1"
            android:gravity="center"
            android:orientation="vertical"
            android:padding="20dp"
            android:paddingStart="20dp"
            android:paddingEnd="20dp">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Networks"
                android:textAlignment="center"
                android:textColor="#000" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:layout_marginBottom="16dp"
            android:background="@drawable/st_home_btn_bg_1"
            android:gravity="center"
            android:orientation="vertical"
            android:padding="20dp"
            android:paddingStart="20dp"
            android:paddingEnd="20dp"
            android:layout_marginStart="10dp">



            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Theories"
                android:textAlignment="center"
                android:textColor="#000" />
        </LinearLayout>
        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:layout_marginBottom="16dp"
            android:background="@drawable/st_home_btn_bg_1"
            android:gravity="center"
            android:orientation="vertical"
            android:padding="20dp"
            android:paddingStart="20dp"
            android:paddingEnd="20dp"
            android:layout_marginStart="10dp">


            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Questions"
                android:textAlignment="center"
                android:textColor="#000" />
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

Answer 1

我可以建议在 ViewPager 的每个屏幕上使用 Fragments 吗？然后在你的 Fragment 中你可以做任何你想做的事情，使用你需要的所有 ClickListener。

我已经为你创建了一个要点 gist ViewPagerAdapter