Unable to start activity Error: NullPointerException in onCreate

Question

当我点击产品ListView查看产品数据时出现错误！ NullPointerException

FragmentAllShop.java onClick 列表视图项目将转到详细信息页面

@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {  
    int detailshop_id = model.getShop_id();
    String shopID = String.valueOf(detailshop_id);
    Toast.makeText(FragmentAllShopping.this.getActivity(), "Select shopping_id: "+detailshop_id, Toast.LENGTH_SHORT).show();

    Intent shopDetail = new Intent(getActivity(), ShoppingDetailActivity.class);
    shopDetail.putExtra("shopID", shopID);
    startActivity(shopDetail);
}

ShoppingDetail.java 第 89 行代码错误 -> TitleShop.setText(model.getShop_title());

    ShowImgProduct = (ImageView)findViewById(R.id.ShowImgProduct);
    TitleShop = (TextView)findViewById(R.id.TitleShop);
    TVPriceDetail = (TextView)findViewById(R.id.TVPriceDetail);
    DetailProduct = (TextView)findViewById(R.id.DetailProduct);
    TVuserPost = (TextView)findViewById(R.id.TVuserPost);

    show_shopdetail_id = getIntent().getStringExtra("shopID");
    detailshop_id = Integer.parseInt(show_shopdetail_id);

    JSONParser jspaser = new JSONParser();
    String url = "http://www.leveltistweb09.com/Hello_Oppa/get_shoppingdetail.php?shop_id="+detailshop_id;
    String dataJSON = jspaser.makeHttpRequest(url,JSONParser.methodGet, null);


    try {

        jsOBJ = new JSONObject(dataJSON);               
        int shop_id = jsOBJ.getInt("shop_id");
        String shop_img_url = jsOBJ.getString("shop_img_url");
        String shop_title = jsOBJ.getString("shop_title");
        String shop_price = "ราคา "+jsOBJ.getString("shop_price")+" บาท";
        String shop_detail = jsOBJ.getString("shop_detail");
        String user_display_name = "post by : "+jsOBJ.getString("user_display_name");
        String shop_email = jsOBJ.getString("shop_email");
        String shop_tel = jsOBJ.getString("shop_tel");


        model = new AllShop_Model(shop_id, shop_img_url, shop_title, shop_price, shop_detail, 
                user_display_name, shop_email, shop_tel);

    } catch (Exception e) {
        // TODO: handle exception
        e.printStackTrace();
    }


    TitleShop.setText(model.getShop_title());
    TVPriceDetail.setText(model.getShop_price());
    DetailProduct.setText(model.getShop_detail());
    TVuserPost.setText(model.getUser_display_name());

    String path = "http://su13540254.2th.asia/Hello_Oppa/img/";
    ShowImgProduct.setImageBitmap(loadBitmap(path+model.getShop_img_url()));
}

错误图片点击！！第 89 行代码错误 -> TitleShop.setText(model.getShop_title());

Answer 1

-首先你必须检查你是否得到 Json response 正确与否然后检查是否响应是正确的那么你是否存储在正确的对象中，即：- shop_title此处不为空检查。

-让我知道是否存在更多问题谢谢

Unable to start activity Error: NullPointerException in onCreate

Unable to start activity Error: NullPointerException in onCreate

java

android

syntax-error

nullpointerexception