我只能获得一个url（链接）的一部分并在android中放入字符串？

Question

[已解决] - 我需要解决以下问题 好吧我真的不确定如何说出这个问题，但基本上我想要做的是，我从android中的RSS源获取了一个url，我需要将该url的一部分放入一个字符串中，url会看起来类似这样的事情：http://www.prsn.uprm.edu/Spanish/Informe_Sismo/myinfoGeneral.php?id=20161206012821'我只想要id = 仅限ID ID 之后的部分，然后我需要id将其放在以下网址中：http://shake.uprm.edu/~shake/archive/shake/**ID HERE**/download/tvmap.jpg，在Glide中加载与id对应的图像： [已解决] 此部分已解决，但我还有其他问题

我必须这样做

第一种方式：

 //the original String
    String somestring = "http://www.prsn.uprm.edu/Spanish/Informe_Sismo/myinfoGeneral.php?id=20161206012821";
    //save the index of the string '=' since after that is were you find your number, remember to add one as the begin index is inclusive
    int beginIndex = somestring.indexOf("=") + 1;
    //if the number ends the string then save the length of the string as the end, you can change this index if that's not the case
    int endIndex = somestring.length();
    //Obtain the substring using the indexes you obtained (if the number ends the string you can ignore the second index, but i leave it here so you may use it if that's not the case)
    String theNumber = somestring.substring(beginIndex,endIndex);
    //printing the number for testing purposes
    System.out.println("The number is: " + theNumber);
    //Then create a new string with the data you want (I recommend using StringBuilder) with the first part of what you want
    StringBuilder sb=new StringBuilder("http://shake.uprm.edu/~shake/archive/shake/");
    // add the number
    sb.append(theNumber);
    //then the rest of the string
    sb.append("/download/tvmap.jpg");
    //Saving the String in a variable
    String endResult = sb.toString();
    //Verifying end result 
    System.out.println("The end result is: "+endResult);

Glide.with(context).load(endResult).into(holder.Thumbnail);

第二种方式：

String url = "http://www.prsn.uprm.edu/Spanish/Informe_Sismo/myinfoGeneral.php?id=20161206012821";
    String[] array = url.split("id=");
    String id  = array[1];
    String urlToLoad = "http://shake.uprm.edu/~shake/archive/shake/"+id+"/download/tvmap.jpg"
    Glide.with(context).load(urlToLoad).into(holder.Thumbnail);

[问题]

我的问题是，如果我正常放置网址，即http://www.prsn.uprm.edu/Spanish/Informe_Sismo/myinfoGeneral.php?id=20161206012821这两种方法对我有用，但如果我得到网址Via getLink()对我不起作用。 请帮帮我 我希望我解释得很好。 提前致谢。

我的 Myadapter.java 获取链接的方法是 current.getLink()

package com.example.rssreader;

import android.animation.ObjectAnimator;
import android.content.Context;
import android.support.v7.widget.CardView;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;
import com.daimajia.androidanimations.library.Techniques;
import com.daimajia.androidanimations.library.YoYo;
import com.squareup.picasso.Picasso;

import java.util.ArrayList;

/**
 * Created by Efrain on 26-02-2016.
 */
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
    ArrayList<FeedItem>feedItems;
    Context context;
    public MyAdapter(Context context,ArrayList<FeedItem>feedItems){
        this.feedItems=feedItems;
        this.context=context;
    }
    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view= LayoutInflater.from(context).inflate(R.layout.custum_row_news_item,parent,false);
        MyViewHolder holder=new MyViewHolder(view);
        return holder;
    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        YoYo.with(Techniques.FadeIn).playOn(holder.cardView);
        FeedItem current=feedItems.get(position);
        holder.Title.setText(current.getTitle());
        holder.Description.setText(current.getDescription());
        holder.Date.setText(current.getPubDate());
        holder.Link.setText(current.getLink());
        //the original String
        String somestring = current.getLink();
        //save the index of the string '=' since after that is were you find your number, remember to add one as the begin index is inclusive
        int beginIndex = somestring.indexOf("=") + 1;
        //if the number ends the string then save the length of the string as the end, you can change this index if that's not the case
        int endIndex = somestring.length();
        //Obtain the substring using the indexes you obtained (if the number ends the string you can ignore the second index, but i leave it here so you may use it if that's not the case)
        String theNumber = somestring.substring(beginIndex,endIndex);
        //printing the number for testing purposes
        System.out.println("The number is: " + theNumber);
        //Then create a new string with the data you want (I recommend using StringBuilder) with the first part of what you want
        StringBuilder sb=new StringBuilder("http://shake.uprm.edu/~shake/archive/shake/");
        // add the number
        sb.append(theNumber);
        //then the rest of the string
        sb.append("/download/tvmap.jpg");
        //Saving the String in a variable
        String endResult = sb.toString();
        //Verifying end result
        System.out.println("The end result is: "+endResult);
        Glide.with(context).load(endResult).into(holder.Thumbnail);

    }



    @Override
    public int getItemCount() {
        return feedItems.size();
    }

    public class MyViewHolder extends RecyclerView.ViewHolder {
        TextView Title,Description,Date,Link;
        ImageView Thumbnail;
        CardView cardView;
        public MyViewHolder(View itemView) {
            super(itemView);
            Title= (TextView) itemView.findViewById(R.id.title_text);
            Description= (TextView) itemView.findViewById(R.id.description_text);
            Date= (TextView) itemView.findViewById(R.id.date_text);
            Thumbnail= (ImageView) itemView.findViewById(R.id.thumb_img);
            cardView= (CardView) itemView.findViewById(R.id.cardview);
            Link= (TextView) itemView.findViewById(R.id.info);
        }
    }
}

Answer 1

这样做

String url = "http://www.prsn.uprm.edu/Spanish/Informe_Sismo/myinfoGeneral.php?id=20161206012821";
String[] array = url.split("id=");
String id  = array[1];
String urlToLoad = "http://shake.uprm.edu/~shake/archive/shake/"+id+"/download/tvmap.jpg"
Glide.with(context).load(urlToLoad).into(holder.Thumbnail);

然后在您想要使用的地方使用此ID

Answer 2

您可以实现创建要查找的数字的子字符串，然后将其附加到您需要的字符串。

代码如下：

    //the original String
    String somestring = "http://www.prsn.uprm.edu/Spanish/Informe_Sismo/myinfoGeneral.php?id=20161206012821";
    //save the index of the string '=' since after that is were you find your number, remember to add one as the begin index is inclusive
    int beginIndex = somestring.indexOf("=") + 1;
    //if the number ends the string then save the length of the string as the end, you can change this index if that's not the case
    int endIndex = somestring.length();
    //Obtain the substring using the indexes you obtained (if the number ends the string you can ignore the second index, but i leave it here so you may use it if that's not the case)
    String theNumber = somestring.substring(beginIndex,endIndex);
    //printing the number for testing purposes
    System.out.println("The number is: " + theNumber);
    //Then create a new string with the data you want (I recommend using StringBuilder) with the first part of what you want
    StringBuilder sb=new StringBuilder("http://shake.uprm.edu/~shake/archive/shake/");
    // add the number
    sb.append(theNumber);
    //then the rest of the string
    sb.append("/download/tvmap.jpg");
    //Saving the String in a variable
    String endResult = sb.toString();
    //Verifying end result 
    System.out.println("The end result is: "+endResult);

之后你可以把String放到Glide中 我希望它很清楚，也很好解释。