动态加载数据到一个新视图

问题描述

首先即时动态加载数据到一个网格，其是在PMenu.java，那么每一个项具有更多的按钮。有一次我pressed，我想加载图像，名称及其在物品描述视图金额。

林使用自定义网格将数据加载到PMenu.java网格，我已经放置在自定义网格的一个按钮，以便将导航到viewmore.java

我想知道，一旦我preSS的按钮，然后如何将数据加载到viewmore.java文件

PMenu.java片段

 的GridView网格;@覆盖
    公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，
            捆绑savedInstanceState）{
        查看查看= inflater.inflate（R.layout.menu_grid_main，集装箱，FALSE）;        新PMenuAsyncTask（getActivity（），这一点）.execute（）;
        格=（GridView控件）view.findViewById（R.id.grid）;
        返回视图。
}@覆盖
    公共无效onTaskCompleted（JSONArray responseJson）{        尝试{
            清单＆LT;串GT;说明=新的ArrayList＆LT;串GT;（）;
            清单＆LT;串GT; imageUrls =新的ArrayList＆LT;串GT;（）;            的for（int i = 0; I＆LT; responseJson.length（）; ++ I）{
                的JSONObject对象= responseJson.getJSONObject（I）                如果（（object.getString（MainCategoryID））。等于（1）
                        ＆功放;＆安培; （object.getString（SubCategoryID））。等于（1））{
                    Log.i（IMAGEURL，object.getString（IMAGEURL））;
                    imageUrls.add（object.getString（IMAGEURL））;
                    Log.i（描述，object.getString（描述））;
                    descriptions.add（object.getString（描述））;
                }            }            CustomGrid适配器=新CustomGrid（getActivity（），描述，
                    imageUrls）;
            grid.setAdapter（适配器）;
        }赶上（JSONException E）{
            e.printStackTrace（）;
        }
    }
 

CustomGrid类

 公共类CustomGrid延伸BaseAdapter {
    私人上下文的背景下;
    私人最终名单＆LT;串GT;描述;
    私人最终名单＆LT;串GT; imageUrls;    公共CustomGrid（上下文C，列表与LT;弦乐＆GT;的描述，列表与LT;弦乐＆GT; imageUrls）{
        this.context = C;
        this.descriptions =描述;
        this.imageUrls = imageUrls;
    }    @覆盖
    公众诠释的getCount（）{
        返回descriptions.size（）;
    }    @覆盖
    公共对象的getItem（INT位置）{
        返回descriptions.get（位置）;
    }    @覆盖
    众长getItemId（INT位置）{
        返回的位置;
    }    @覆盖
    公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
        ViewHolder持有人;
        如果（convertView == NULL）{
            持有人=新ViewHolder（）;
            convertView = LayoutInflater.from（上下文）.inflate（
                    R.layout.fragment_pizza，父母，假）;
            holder.ivImage =（ImageView的）convertView
                    .findViewById（R.id.grid_image）;
            holder.tvHeader =（TextView中）convertView
                    .findViewById（R.id.grid_text）;
            convertView.setTag（保持器）;        }其他{
            支架=（ViewHolder）convertView.getTag（）;
        }
        holder.tvHeader.setText（descriptions.get（位置））;
        Picasso.with（this.context）.load（imageUrls.get（位置））到（holder.ivImage）。        键返回按钮=（按钮）convertView.findViewById（R.id.button1）;
        backButton.setOnClickListener（新View.OnClickListener（）{
            @覆盖
            公共无效的onClick（查看视图）{
                接下来意向=新意图（背景下，viewmore.class）;
                context.startActivity（下）;
            next.putExtra（说明，descriptions.get（位置））;
            next.putExtra（图片网址，imageUrls.get（位置））;
            context.startActivity（下）;
            }
        }）;
        返回convertView;
    }    私有类ViewHolder {
        私人TextView的tvHeader;
        私人ImageView的ivImage;
    }
}
 

viewmore.java

 公共类viewmore延伸活动{    私人上下文的背景下;
    私人最终名单＆LT;串GT;描述;
    私人最终名单＆LT;串GT; imageUrls;    公共viewmore（上下文C，列表与LT;弦乐＆GT;的描述，列表与LT;弦乐＆GT; imageUrls）{
        this.context = C;
        this.descriptions =描述;
        this.imageUrls = imageUrls;
    }
    私人动作条动作条;    @覆盖
    公共无效的onCreate（捆绑savedInstanceState）{
        super.onCreate（savedInstanceState）;
        this.setContentView（R.layout.activity_viewmore）;        字符串描述= getIntent（）getStringExtra（说明）。
        串图片网址= getIntent（）getStringExtra（图片网址）;        动作条= getActionBar（）;
        actionBar.setDisplayHomeAsUpEnabled（真）;
        actionBar.setDisplayShowHomeEnabled（假）;
        actionBar.setDisplayShowTitleEnabled（真）;
        actionBar.setDisplayUseLogoEnabled（假）;    }    @覆盖
    公共布尔onCreateOptionsMenu（菜单菜单）{
        MenuInflater吹气= getMenuInflater（）;
        inflater.inflate（R.menu.activity_main_actions，菜单）;        //使用搜索查看搜索关联配置        返回super.onCreateOptionsMenu（菜单）;
    }    @覆盖
    公共布尔onOptionsItemSelected（菜单项项）{
        //将每个动作项目点击适当的行动
        开关（item.getItemId（））{
        案例R.id.action_cart：
            返回true;
        案例R.id.action_search：
            //搜索行动
            返回true;        默认：
            返回super.onOptionsItemSelected（项目）;
        }
    }     @覆盖
        公共查看getView（最终诠释的立场，观点convertView，父母的ViewGroup）{
            ViewHolder持有人;
            如果（convertView == NULL）{
                持有人=新ViewHolder（）;
                convertView = LayoutInflater.from（上下文）.inflate（
                        R.layout.activity_viewmore，父母，假）;
                holder.ivImage =（ImageView的）convertView
                        .findViewById（R.id.grid_image）;
                holder.tvHeader =（TextView中）convertView
                        .findViewById（R.id.grid_text）;
                convertView.setTag（保持器）;            }其他{
                支架=（ViewHolder）convertView.getTag（）;
            }
            holder.tvHeader.setText（descriptions.get（位置））;
            Picasso.with（this.context）.load（imageUrls.get（位置））到（holder.ivImage）。            返回convertView;
        }        私有类ViewHolder {
            私人TextView的tvHeader;
            私人ImageView的ivImage;
        }}
 

解决方案

您可以使用 intent.putExtra（钥匙，值）启动<$ C之前的方法$ C> viewmore 活动。

然后在 viewmore 活动，您可以从 getIntent（）。获得*额外的（钥匙）方法。

我爱：

 意图下一=新意图（背景下，viewmore.class）;
next.putExtra（说明，descriptions.get（位置））;
next.putExtra（图片网址，imageUrls.get（位置））;
context.startActivity（下）;
 

然后（在 viewmore 活动）：

 保护无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    this.setContentView（R.layout.activity_viewmore）;    字符串描述= getIntent（）getStringExtra（说明）。
    串图片网址= getIntent（）getStringExtra（图片网址）;    //使用布局activity_viewmore.xml定义其ID获取的TextView
    TextView的电视=（的TextView）findViewById（R.id.my_text_view）;
    tv.setText（介绍）;    ImageView的ImageView的=（ImageView的）findViewById（R.id.my_image_view）;
    Picasso.with（本）.load（图片网址）.into（ImageView的）;
}
 

First im loading the data dynamically to a grid which is in the PMenu.java, then each item has view more button. once I pressed that I want to load the image, name and its amount in the item description view.

Im using a custom grid to load data to the grid in PMenu.java, and I have placed a button in the custom grid, so that it will navigate to viewmore.java.

I want to know once i press the button then how to load the data to viewmore.java file

PMenu.java fragment

GridView grid;

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.menu_grid_main, container, false);

        new PMenuAsyncTask(getActivity(), this).execute();
        grid = (GridView) view.findViewById(R.id.grid);
        return view;
}

@Override
    public void onTaskCompleted(JSONArray responseJson) {

        try {
            List<String> descriptions = new ArrayList<String>();
            List<String> imageUrls = new ArrayList<String>();

            for (int i = 0; i < responseJson.length(); ++i) {
                JSONObject object = responseJson.getJSONObject(i);

                if ((object.getString("MainCategoryID")).equals("1")
                        && (object.getString("SubCategoryID")).equals("1")) {
                    Log.i("ImageURL ", object.getString("ImageURL"));
                    imageUrls.add(object.getString("ImageURL"));
                    Log.i("Description ", object.getString("Description"));
                    descriptions.add(object.getString("Description"));
                }

            }

            CustomGrid adapter = new CustomGrid(getActivity(), descriptions,
                    imageUrls);
            grid.setAdapter(adapter);
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

CustomGrid class

public class CustomGrid extends BaseAdapter {
    private Context context;
    private final List<String> descriptions;
    private final List<String> imageUrls;

    public CustomGrid(Context c, List<String> descriptions, List<String> imageUrls) {
        this.context = c;
        this.descriptions = descriptions;
        this.imageUrls = imageUrls;
    }

    @Override
    public int getCount() {
        return descriptions.size();
    }

    @Override
    public Object getItem(int position) {
        return descriptions.get(position);
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            holder = new ViewHolder();
            convertView = LayoutInflater.from(context).inflate(
                    R.layout.fragment_pizza, parent, false);
            holder.ivImage = (ImageView) convertView
                    .findViewById(R.id.grid_image);
            holder.tvHeader = (TextView) convertView
                    .findViewById(R.id.grid_text);
            convertView.setTag(holder);

        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.tvHeader.setText(descriptions.get(position));
        Picasso.with(this.context).load(imageUrls.get(position)).into(holder.ivImage);

        Button backButton = (Button) convertView.findViewById(R.id.button1);
        backButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View view) {
                Intent next = new Intent(context, viewmore.class);
                context.startActivity(next);
            next.putExtra("description", descriptions.get(position));
            next.putExtra("imageUrl", imageUrls.get(position));
            context.startActivity(next);
            }
        });


        return convertView;
    }

    private class ViewHolder {
        private TextView tvHeader;
        private ImageView ivImage;
    }
}

viewmore.java

public class viewmore extends Activity {

    private Context context;
    private final List<String> descriptions;
    private final List<String> imageUrls;

    public viewmore(Context c, List<String> descriptions, List<String> imageUrls) {
        this.context = c;
        this.descriptions = descriptions;
        this.imageUrls = imageUrls;
    }
    private ActionBar actionBar;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.setContentView(R.layout.activity_viewmore);

        String description = getIntent().getStringExtra("description");
        String imageUrl = getIntent().getStringExtra("imageUrl");

        actionBar = getActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setDisplayShowHomeEnabled(false);
        actionBar.setDisplayShowTitleEnabled(true);
        actionBar.setDisplayUseLogoEnabled(false);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.activity_main_actions, menu);

        // Associate searchable configuration with the SearchView

        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Take appropriate action for each action item click
        switch (item.getItemId()) {
        case R.id.action_cart:
            return true;
        case R.id.action_search:
            // search action
            return true;

        default:
            return super.onOptionsItemSelected(item);
        }
    }

     @Override
        public View getView(final int position, View convertView, ViewGroup parent) {
            ViewHolder holder;
            if (convertView == null) {
                holder = new ViewHolder();
                convertView = LayoutInflater.from(context).inflate(
                        R.layout.activity_viewmore, parent, false);
                holder.ivImage = (ImageView) convertView
                        .findViewById(R.id.grid_image);
                holder.tvHeader = (TextView) convertView
                        .findViewById(R.id.grid_text);
                convertView.setTag(holder);

            } else {
                holder = (ViewHolder) convertView.getTag();
            }
            holder.tvHeader.setText(descriptions.get(position));
            Picasso.with(this.context).load(imageUrls.get(position)).into(holder.ivImage);

            return convertView;
        }

        private class ViewHolder {
            private TextView tvHeader;
            private ImageView ivImage;
        }



}

解决方案

You can use intent.putExtra("key", value) methods before starting the viewmore Activity.

Then in the viewmore Activity, you can get these data from the getIntent().get*Extra("key") methods.

Like:

Intent next = new Intent(context, viewmore.class);
next.putExtra("description", descriptions.get(position));
next.putExtra("imageUrl", imageUrls.get(position));
context.startActivity(next);

Then (in viewmore Activity):

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.setContentView(R.layout.activity_viewmore);

    String description = getIntent().getStringExtra("description");
    String imageUrl = getIntent().getStringExtra("imageUrl");

    // Get the TextView using its ID defined in the layout activity_viewmore.xml
    TextView tv = (TextView) findViewById(R.id.my_text_view);
    tv.setText(description);

    ImageView imageView = (ImageView) findViewById(R.id.my_image_view);
    Picasso.with(this).load(imageUrl).into(imageView);
}

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