ListViewのonListItemClickが機能しない - Android

Question

OnListItemClickを実装しようとしていますが、機能しないようです。来るエラーがない、以下閉じなど何の力は、私が持っているコードではありません：

package com.odhranlynch.filmCollection; 

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

import org.apache.http.util.ByteArrayBuffer; 

import android.app.Activity; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.SQLException; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ArrayAdapter; 
import android.widget.ListView; 
import android.widget.TextView; 

public class Main extends Activity { 
/** Called when the activity is first created. */ 
private final String databaseFilename = "/films.db"; //filename 
private final String url = "www.somesite.com"; //download database from here 
ArrayList<FilmRecord> films = new ArrayList<FilmRecord>(); 

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

    ListView listView = (ListView) findViewById(R.id.lstFilms); 
    listView.setAdapter(new FilmItemAdapter(this, android.R.layout.simple_list_item_1, films)); 
} 


protected void onListItemClick(ListView l, View v, int position, long id) 
{ 
    //ListItem clicked. 
    Log.d("ListView", String.valueOf(l.getSelectedItemPosition())); 
} 

public void DownloadFromUrl(String DownloadUrl, String fileName) { 
    try { 
     File root = android.os.Environment.getExternalStorageDirectory();    

     File dir = new File (root.getAbsolutePath() + "/Android/data/com.odhranlynch.filmcollection"); 
     if(dir.exists()==false) { 
      dir.mkdirs(); 
     } 

     URL url = new URL(DownloadUrl); //you can write here any link 
     File file = new File(dir, fileName); 

     long startTime = System.currentTimeMillis(); 
     Log.d("DownloadManager", "download begining"); 
     Log.d("DownloadManager", "download url:" + url); 
     Log.d("DownloadManager", "downloaded file name:" + fileName); 

     /* Open a connection to that URL. */ 
     URLConnection ucon = url.openConnection(); 

     /* 
     * Define InputStreams to read from the URLConnection. 
     */ 
     InputStream is = ucon.getInputStream(); 
     BufferedInputStream bis = new BufferedInputStream(is); 

     /* 
     * Read bytes to the Buffer until there is nothing more to read(-1). 
     */ 
     ByteArrayBuffer baf = new ByteArrayBuffer(5000); 
     int current = 0; 
     while ((current = bis.read()) != -1) { 
      baf.append((byte) current); 
     } 


     /* Convert the Bytes read to a String. */ 
     FileOutputStream fos = new FileOutputStream(file); 
     fos.write(baf.toByteArray()); 
     fos.flush(); 
     fos.close(); 
     Log.d("DownloadManager", "download ready in" + ((System.currentTimeMillis() - startTime)/1000) + " sec"); 

     //Download completed, run populateFields method. 
     populateFields(); 

} catch (IOException e) { 
    Log.d("DownloadManager", "Error: " + e); 
    } 
} 

public class FilmItemAdapter extends ArrayAdapter<FilmRecord> { 
    private ArrayList<FilmRecord> films; 

    public FilmItemAdapter(Context context, int textViewResourceId, ArrayList<FilmRecord> films) { 
     super(context, textViewResourceId, films); 
     this.films = films; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     View v = convertView; 
     if (v == null) { 
      LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      v = vi.inflate(R.layout.listitem, null); 
     } 

     FilmRecord film = films.get(position); 
     if (film != null) { 
      TextView filmTitle = (TextView) v.findViewById(R.id.username); 
      TextView filmShowingDate = (TextView) v.findViewById(R.id.email); 

      if (filmTitle != null) { 
       filmTitle.setText(film.filmTitle); 
      } 

      if(filmShowingDate != null) { 
       filmShowingDate.setText("Showing on " + film.filmShowingDate); 
      } 
     } 
     return v; 
    } 
} 

public class FilmRecord { 
    public String filmTitle; 
    public String filmShowingDate; 

    public FilmRecord(String username, String email) { 
     this.filmTitle = username; 
     this.filmShowingDate = email; 
    } 
} 

public void populateFields() { 
    //Populate the views with database content. 


    DataBaseHelper myDbHelper = new DataBaseHelper(this);; 
    myDbHelper = new DataBaseHelper(this); 

    //Load "productDatabase" database (see assets to left). 
    { 
     try { 
      myDbHelper.createDataBase();} 
     catch (IOException ioe) { 
      throw new Error("Unable to create database");} 

     try { 
      myDbHelper.openDataBase();} 
     catch(SQLException sqle){ 
      throw sqle;} 
    } 

    //---Get all records from database--- 
    myDbHelper.openDataBase(); 
    Cursor cursorPosition = myDbHelper.getAllTitles(); 


    if (cursorPosition.moveToFirst()) 
    { 
    do { 
    AddRecordToArray(cursorPosition); 
    } while (cursorPosition.moveToNext()); 
    } 
    myDbHelper.close(); 
    } 

    public void AddRecordToArray(Cursor cursorPosition) 
    { 
     //Add new record to array (which gets data from database using cursorPosition (for current row) and .getstring(for column number). 
     FilmRecord film1 = new FilmRecord(cursorPosition.getString(1), cursorPosition.getString(4)); 
     films.add(film1); 
    } 
} 

誰かが親切にも、このいずれかに私を助けることになる場合、私は本当に感謝だろう:)

Answer 1

リスナーをリストに設定していません。

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    DownloadFromUrl(url, databaseFilename); 

    ListView listView = (ListView) findViewById(R.id.lstFilms); 
    listView.setAdapter(new FilmItemAdapter(this, android.R.layout.simple_list_item_1, films)); 
    listView.setOnItemClickListener(new OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> adapter, View view, int pos, long id) { 
       Log.d("ListView", String.valueOf(pos)); 
      } 
    }); 
} 

アレイの特定の要素にアクセスするには、アダプタ実装にいくつかのメソッドを追加することもできます。

Answer 2

問題は、ListActivityの代わりにActivityから拡張しているということです。 アクティビティから拡張したい場合は、コードを変更することができます。

public class Main extends Activity implements OnItemClickListener 

とあなたのonCreate関数の最後でのonCreateに

listView.setOnItemClickListener(this); 

Answer 3

使用このコードを追加します。ClickOnList

class ClickOnList implements OnItemClickListener 
    { 
     @Override 
     public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, 
       long arg3) { 
      Log.d("ListView", "Position"+arg2); 

     } 

    }