【发布时间】：2020-06-10 12:41:07
【问题描述】：
我添加到我的应用 ViewPager 以显示一组图像我从数据库中获取图像。它工作正常但我需要工作（意图）到图像。所以在用户点击图像的地方他应该去一个新的活动和看到里面的那张图。我搜索了一个解决方案，但找不到解决方案。
如果有人知道解决方案，请帮助我。
public class ViewPagerAdapter extends PagerAdapter {
private Context context;
private LayoutInflater layoutInflater;
private List<SliderUtils> sliderImg;
private ImageLoader imageLoader;
public ViewPagerAdapter(List sliderImg,Context context) {
this.sliderImg = sliderImg;
this.context = context;
}
@Override
public int getCount() {
return sliderImg.size();
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
@Override
public Object instantiateItem(ViewGroup container, final int position) {
layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(R.layout.custom_layout, null);
SliderUtils utils = sliderImg.get(position);
ImageView imageView = (ImageView) view.findViewById(R.id.imageView);
imageLoader = CustomVolleyRequest.getInstance(context).getImageLoader();
imageLoader.get(utils.getSliderImageUrl(), ImageLoader.getImageListener(imageView, R.mipmap.ic_launcher_round, android.R.drawable.ic_dialog_alert));
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(position == 0){
Toast.makeText(context, "Slide 1 Clicked", Toast.LENGTH_SHORT).show();
} else if(position == 1){
Toast.makeText(context, "Slide 2 Clicked", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(context, "Slide 3 Clicked", Toast.LENGTH_SHORT).show();
}
}
});
ViewPager vp = (ViewPager) container;
vp.addView(view, 0);
return view;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
ViewPager vp = (ViewPager) container;
View view = (View) object;
vp.removeView(view);
}
}
public class FoodFregmaent extends Fragment {
ViewPager viewPager;
LinearLayout sliderDotspanel;
private int dotscount;
private ImageView[] dots;
RequestQueue rq;
List<SliderUtils> sliderImg;
ViewPagerAdapter viewPagerAdapter;
String request_url = "http://===========sliedshow.php";
public FoodFregmaent() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_food_fregmaent, container, false);
rq = CustomVolleyRequest.getInstance(getContext()).getRequestQueue();
sliderImg = new ArrayList<>();
viewPager = (ViewPager) view.findViewById(R.id.viewPager);
sliderDotspanel = (LinearLayout)view. findViewById(R.id.SliderDots);
sendRequest();
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
for(int i = 0; i< dotscount; i++){
dots[i].setImageDrawable(ContextCompat.getDrawable(getContext().getApplicationContext(), R.drawable.nonactive_dot));
}
dots[position].setImageDrawable(ContextCompat.getDrawable(getContext().getApplicationContext(), R.drawable.active_dot));
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
return view;
}
public void sendRequest(){
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.POST, request_url, null, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
for(int i = 0; i < response.length(); i++){
SliderUtils sliderUtils = new SliderUtils();
try {
JSONObject jsonObject = response.getJSONObject(i);
sliderUtils.setSliderImageUrl(jsonObject.getString("imageurl"));
} catch (JSONException e) {
e.printStackTrace();
}
sliderImg.add(sliderUtils);
}
viewPagerAdapter = new ViewPagerAdapter(sliderImg, getActivity());
viewPager.setAdapter(viewPagerAdapter);
dotscount = viewPagerAdapter.getCount();
dots = new ImageView[dotscount];
for(int i = 0; i < dotscount; i++){
dots[i] = new ImageView(getActivity());
dots[i].setImageDrawable(ContextCompat.getDrawable(getContext().getApplicationContext(), R.drawable.nonactive_dot));
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
params.setMargins(8, 0, 8, 0);
sliderDotspanel.addView(dots[i], params);
}
dots[0].setImageDrawable(ContextCompat.getDrawable(getContext().getApplicationContext(), R.drawable.ic_launcher_background));
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
});
CustomVolleyRequest.getInstance(getContext()).addToRequestQueue(jsonArrayRequest);
Timer timer = new Timer();
timer.scheduleAtFixedRate(new MyTimerTask(), 2000, 4000);
}
public class MyTimerTask extends TimerTask {
@Override
public void run() {
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
if(viewPager.getCurrentItem() == 0){
viewPager.setCurrentItem(1);
} else if(viewPager.getCurrentItem() == 1){
viewPager.setCurrentItem(2);
} else {
viewPager.setCurrentItem(0);
}
}
});
}
}
}
public class SliderUtils {
String imageurl;
public String getSliderImageUrl() {
return imageurl;
}
public void setSliderImageUrl(String imageurl) {
this.imageurl = imageurl;
}
}
我仍然在寻找解决方案
【问题讨论】：
-
在开始另一个活动时需要通过 Intent 传递。见这里：stackoverflow.com/a/23577964/13709773
-
我是一个新的应用程序开发人员，经验很少。此链接与我的项目不同。而且他也只传图片，如果他也想传文字怎么办
标签： android