1

こんにちは、JSON テキストとサムネイル画像を読み込むリストビューがあります。http://www.androidhive.info/2012/02/android-custom-listview-with-image-and-text/のチュートリアルのコードを使用し、これを xml からロード json に変換しました。

テキストと画像の解析はリストビューで機能しますが、サムネイルと同じ画像を表示したい詳細ビューのような 2 番目のアクティビティを追加しました。lazylist チュートリアルの ImageLoader クラスを使用します。

問題は、詳細ビューでこの画像を読み込めないことです。誰かがこれを機能させる方法を提案していますか?

私のコード CustomizedListView:

    `package com.example.androidhive;

    import java.util.ArrayList;
    import java.util.HashMap;

    import org.json.JSONArray;
    import org.json.JSONException;
    import org.json.JSONObject;
    import org.w3c.dom.Document;

import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

import com.example.androidhive.JSONParser;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;

public class CustomizedListView extends Activity {


    // url om request te maken
    private static String URL = "http://www.iappministrator.com/OBDE/webservice/android_deelnemers_items.php";



    // JSON Node namen
    static final String TAG_ITEMS = "items";
    static final String TAG_TITLE = "title";
    static final String TAG_MESSAGE = "message";
    static final String TAG_DATE = "date";
    static final String TAG_IMAGES = "images";

    // Nieuws JSONArray
    JSONArray newsArray = null;

    ListView list;
    LazyAdapter adapter;

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

        // Hashmap voor listView
        ArrayList<HashMap<String, String>> newsList = new ArrayList<HashMap<String, String>>();

        // Maak een JSON Parser instance
        JSONParser jParser = new JSONParser();

        // Pakt JSON string uit URL
        JSONObject json = jParser.getJSONFromUrl(URL);

        try{
            // Pakt de Array van Nieuwsartikelen
            newsArray = json.getJSONArray(TAG_ITEMS);

            // Loop door alle Nieuwsartikels
            for(int i=0; i < newsArray.length(); i++){
                JSONObject c = newsArray.getJSONObject(i);

                // Het plaatsen van elk json item in variabele
                String title = c.getString(TAG_TITLE);
                String message = c.getString(TAG_MESSAGE);
                String date = c.getString(TAG_DATE);
                String images = c.getString(TAG_IMAGES);

                // maak een nieuwe HashMap
                HashMap<String, String> map = new HashMap<String, String>();

                // voeg elk item child node in de Hashmap -> value
                map.put(TAG_TITLE, title);
                map.put(TAG_MESSAGE, message);
                map.put(TAG_DATE, date);
                map.put(TAG_IMAGES, images);


                // voeg de HashList toe aan ArrayList
                newsList.add(map);
            }
        } catch(JSONException e){
            e.printStackTrace();
        }


        list=(ListView)findViewById(R.id.list);

        adapter=new LazyAdapter(this, newsList, R.layout.list_row, 
                new String[]{TAG_TITLE, TAG_MESSAGE, TAG_DATE, TAG_IMAGES}, new int[] {
                R.id.title, R.id.artist, R.id.duration, R.id.list_image});        
        list.setAdapter(adapter);


        // Click event for single list row
        list.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {


                String title = ((TextView) view.findViewById(R.id.title)).getText().toString();
                String date = ((TextView) view.findViewById(R.id.duration)).getText().toString();
                String message = ((TextView) view.findViewById(R.id.artist)).getText().toString();
                //String images = ((TextView) view.findViewById(R.id.list_image)).getText().toString();
                //ImageView thumb_image = (ImageView) view.findViewById(R.id.thumbnail); // thumb image
                String images = ((ImageView)view.findViewById(R.id.list_image)).getImageMatrix().toString();
                //String images = ((ImageView)view.findViewById(R.id.list_image)).toString();
                //String images = ((ImageView)view.findViewById(R.id.list_image)).getContext().toString();

                // Start de nieuwe intent

                Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
                //Bitmap bitmap = (Bitmap) in.getParcelableExtra(TAG_IMAGES);

                in.putExtra(TAG_TITLE, title);
                in.putExtra(TAG_DATE, date);
                in.putExtra(TAG_MESSAGE, message);
                in.putExtra(TAG_IMAGES, images);
                startActivity(in);

            }
        });     
    }   
}`

secondActivity のコード:

    package com.example.androidhive;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;

import com.nostra13.example.universalimageloader.ImageGridActivity.ImageAdapter;

import android.app.Activity;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.widget.ImageView;
import android.widget.TextView;

public class SingleMenuItemActivity  extends Activity {

    // JSON node keys
    private static final String TAG_TITLE = "title";
    private static final String TAG_MESSAGE = "message";
    private static final String TAG_DATE = "date";
    private static final String TAG_IMAGES = "images";

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


        // getting intent data
        Intent in = getIntent();

        // Get JSON values from previous intent
        String title = in.getStringExtra(TAG_TITLE);
        String date = in.getStringExtra(TAG_DATE);
        String message = in.getStringExtra(TAG_MESSAGE);
        String images = in.getStringExtra(TAG_IMAGES);
        //Bitmap bitmap = in.getParcelableExtra(TAG_IMAGES);
        //ImageView thumb_image=(ImageView)vi.findViewById(R.id.list_image);

        // Displaying all values on the screen
        TextView lblTitle = (TextView) findViewById(R.id.title_label);
        TextView lblDate = (TextView) findViewById(R.id.date_label);
        TextView lblMessage = (TextView) findViewById(R.id.message_label);
        ImageView lblImages = (ImageView) findViewById(R.id.images_label); 
        //TextView lblImages = (TextView) findViewbyId(R.id.images_label);

        // loader image
        //int loader = R.drawable.loader;
        System.out.println("Ja en nu werkt het niet meer");

        // image url
        //String image_url = "http://d24w6bsrhbeh9d.cloudfront.net/photo/5614379_460s.jpg";

       //ImageLoader imgLoader = new ImageLoader(getApplicationContext());
        //-imgLoader.DisplayImage(song.get(CustomizedListView.TAG_IMAGES), lblImages);
        System.out.println("Error? haha bam jammer dan:");
       //imgLoader.DisplayImage(images, lblImages);
        System.out.println("Plaatjes?:"+ images);

        lblTitle.setText(title);
        lblDate.setText(date);
        lblMessage.setText(message);
        //lblImages.setImageURI(Uri.parse(images));

        //ImageLoader imageLoader = new ImageLoader(getApplicationContext());
        //imageLoader.DisplayImage(images,lblImages);

        //lblImages.setImageResource(images);
        //imageLoader.displayImage(images);
        //lblImages.setImageBitmap(bitmap);
        //lblImages.setImageResource(R.drawable.bitmap);
        //lblImages.setImageResource(images);
        /*if (d instanceof BitmapDrawable) {
            Bitmap bm = ((BitmapDrawable)d).getBitmap();
            //Maybe more code here?
            lblImages.setImageBitmap(bm);
    }*/
        //lblImages.setImageResource(images);
        //lblImages.DisplayImage(images);
        //lblImages.DisplayImage(images);
    }
}

怠惰なアダプター:

`package com.example.androidhive;

import java.util.ArrayList;
import java.util.HashMap;

import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class LazyAdapter extends BaseAdapter {

    private Activity activity;
    private ArrayList<HashMap<String, String>> data;
    private static LayoutInflater inflater=null;
    public ImageLoader imageLoader; 

    public LazyAdapter(Activity a, ArrayList<HashMap<String, String>> d, int listRow, String[] strings, int[] is) {
        activity = a;
        data=d;
        inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        imageLoader=new ImageLoader(activity.getApplicationContext());
    }

    public int getCount() {
        return data.size();
    }

    public Object getItem(int position) {
        return position;
    }

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

    public View getView(int position, View convertView, ViewGroup parent) {
        View vi=convertView;
        if(convertView==null)
            vi = inflater.inflate(R.layout.list_row, null);

        TextView title = (TextView)vi.findViewById(R.id.title); // title
        TextView artist = (TextView)vi.findViewById(R.id.artist); // artist name
        TextView duration = (TextView)vi.findViewById(R.id.duration); // duration
        ImageView thumb_image=(ImageView)vi.findViewById(R.id.list_image); // thumb image

        HashMap<String, String> song = new HashMap<String, String>();
        song = data.get(position);

        // Setting all values in listview
        title.setText(song.get(CustomizedListView.TAG_TITLE));
        artist.setText(song.get(CustomizedListView.TAG_MESSAGE));
        duration.setText(song.get(CustomizedListView.TAG_DATE));
        imageLoader.DisplayImage(song.get(CustomizedListView.TAG_IMAGES), thumb_image);
        return vi;
    }
}`
4

2 に答える 2

0

これをカスタマイズされたリストビューに追加するだけです

TAG_ITEMS = "items";
static final String TAG_TITLE = "title";
static final String TAG_MESSAGE = "message";
static final String TAG_DATE = "date";
static final String TAG_IMAGES = "images";

public void onItemClick(AdapterView<?> parent, View view,
                            int position, long id) {
                          HashMap<String, String> map = newsList.get(position);

                        Intent in = new Intent(SingleMenuItemActivity.this, org.scout.android.library.LibraryDetail.class);
                        in.putExtra(TAG_TITLE, map.get(TAG_TITLE));
                        in.putExtra(TAG_MESSAGE, map.get(TAG_MESSAGE));                         
                        in.putExtra(TAG_DATE, map.get(TAG_DATE));
                        in.putExtra(TAG_IMAGES, map.get(TAG_IMAGES));

                        startActivity(in);

そして、単一のメニュー項目クラスで、次のように余分な画像を取得して表示します。

Intent in = getIntent();
final String image_url = in.getStringExtra(TAG_IMAGES);


ImageView imgv = (ImageView) findViewById(R.id.ID);
ImageLoader imageLoader = new ImageLoader(getApplicationContext());
imageLoader.DisplayImage(iamge_url, imgv);
于 2012-10-17T19:38:28.410 に答える
0

ここで、これを行うためのよりクリーンな方法を提案します（少なくとも私の意見では）。これは、すべてのビューを一覧表示するコードです。

public class ListFiles extends ListActivity {
private List<String> dirEntries = new ArrayList<String>();
File[] files;

@Override
public void onCreate(Bundle bundle) {
    super.onCreate(bundle);

    Intent i = getIntent();
    File dir = new File(i.getStringExtra("directory"));

    if (dir.isDirectory())
        files = dir.listFiles();

    this.dirEntries.clear();

    for (File file : files)
        this.dirEntries.add(file.getPath());

    ArrayAdapter<String> dirList = new ArrayAdapter<String>(this, R.layout.file_row, this.dirEntries);
    this.setListAdapter(dirList);
}

@Override
public void onListItemClick(ListView lv, View v, int pos, long id) {
    File clickedFile = new File(this.dirEntries.get(pos));
    Intent i = getIntent();
    //Detect what view was clicked
    i.putExtra("clickedFile", clickedFile.toString());
    setResult(RESULT_OK, i);
    finish();
}

}

クリックされたビューの詳細のコードは次のとおりです。

public class ImageManipulation extends Activity {
static final String CAMERA_PIC_DIR = "/DCIM/CAMERA";
ImageView image;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.board);

    image = new ImageView(this);
    this.addContentView(image, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
    String dir = Environment.getExternalStorageDirectory().getAbsolutePath() + CAMERA_PIC_DIR;

    Intent i = new Intent(this, ListFiles.class);
    i.putExtra("directory", dir);

    startActivityForResult(i, 0);
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if ((requestCode == 0) && (resultCode == RESULT_OK)) {
        String tmp = data.getExtras().getString("clickedFile");
        Bitmap bmp = BitmapFactory.decodeFile(tmp);
        processImage(bmp);
    }
}

private void processImage(Bitmap bmp) {


    image.setImageBitmap(bmp);
}

}

私のコードでは、リストビューに標準のアダプターを使用していますが、あなたがしたことをこれに適応させるのは非常に簡単だと確信しています.Good Luck!!!!

于 2012-10-17T19:38:57.387 に答える