android实现图片自动滚动并且能滑动

要实现Android中图片的自动滚动并且能够滑动，可以使用ViewPager和Timer实现。

首先，在布局文件中添加ViewPager：

<androidx.viewpager.widget.ViewPager
    android:id="@+id/viewPager"
    android:layout_width="match_parent"
    android:layout_height="200dp" />

然后在Activity或Fragment中获取ViewPager，并设置Adapter和定时器：

ViewPager viewPager = findViewById(R.id.viewPager);
viewPager.setAdapter(new MyPagerAdapter(getSupportFragmentManager()));

// 设置定时器，每隔3秒钟切换一页
Timer timer = new Timer();
timer.schedule(new TimerTask() {
    @Override
    public void run() {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                int currentItem = viewPager.getCurrentItem();
                int count = viewPager.getAdapter().getCount();
                if (currentItem == count - 1) {
                    viewPager.setCurrentItem(0);
                } else {
                    viewPager.setCurrentItem(currentItem + 1);
                }
            }
        });
    }
}, 0, 3000);

在Adapter中实现图片的加载和点击事件：

private class MyPagerAdapter extends FragmentPagerAdapter {

    private int[] imageResIds = {R.drawable.img1, R.drawable.img2, R.drawable.img3};

    public MyPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        ImageFragment fragment = new ImageFragment();
        Bundle args = new Bundle();
        args.putInt("imageResId", imageResIds[position]);
        fragment.setArguments(args);
        return fragment;
    }

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

public static class ImageFragment extends Fragment {

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        ImageView imageView = new ImageView(getContext());
        Bundle args = getArguments();
        int imageResId = args.getInt("imageResId");
        imageView.setImageResource(imageResId);

        // 设置点击事件
        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getContext(), "点击了图片", Toast.LENGTH_SHORT).show();
            }
        });

        return imageView;
    }
}

最后，为了让ViewPager能够滑动，需要给ViewPager设置滑动监听器：

viewPager.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                timer.cancel();
                break;
            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_CANCEL:
                timer.schedule(new TimerTask() {
                    @Override
                    public void run() {
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                int currentItem = viewPager.getCurrentItem();
                                int count = viewPager.getAdapter().getCount();
                                if (currentItem == count - 1) {
                                    viewPager.setCurrentItem(0);
                                } else {
                                    viewPager.setCurrentItem(currentItem + 1);
                                }
                            }
                        });
                    }
                }, 0, 3000);
                break;
        }
        return false;
    }
});