android - チェックボックスの問題: 項目の選択と SQLite データベース - ANDROID

Question

チェックボックスに問題があります。さて、2つの問題。

1. チェックボックスの項目をチェックすると、他の項目もチェックされます。
2. 名前を（チェックした後）SQLiteDatabaseテーブルにキャプチャできません。

私のアプリには、連絡先名の ListView (Android の組み込みの連絡先リストから取得) とチェックボックスがあります。さらに、ユーザーはリスト内の名前を複数選択できます。
1 つのクラス内に 2 つのクラスがあり
ます 1. public class ContactsList
2.public class MyCustomAdapter

ここに私のコードがあります: ContactsList.java - 私のコードを更新しました

public class ContactsList extends ListActivity { static ArrayList friendsList = new ArrayList();

ListView list;
private ContactsList[] friends;
private ArrayAdapter<ContactsList> listAdapter;

final Context context = this;

Cursor cursor;

String[] buddiesList = 
    {"Kanak Priya",
    "Joanne Liew",
    "Michelle Lam",
    "Teo Kin Hua",
    "Melissa Haiting",
    "David Yeo",
    "Natasha Akhbar",
    "Gillian Gan",
    "Sonia",
    "Ms Long",
    "Joan Tang",
    "Stephanie",
    "Nur Ashiqin"
    };

BuddyDBAdapter buddyDB = new BuddyDBAdapter(this);

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    //setListAdapter(new MyCustomAdapter(ContactsList.this, R.layout.contacts_list, buddiesList));
    setContentView(R.layout.contacts_list);

    setListAdapter(new ArrayAdapter<String>(this, R.layout.contacts_list, buddiesList));

    ListView list = (ListView) findViewById(android.R.id.list);
    //ListView list = getListView();
    list.setOnItemClickListener(new AdapterView.OnItemClickListener()
    {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                long id)
        {
            ContactsList friends = listAdapter.getItem(position);
            friends.**toggleChecked**();
            ContactsListViewHolder viewHolder = (ContactsListViewHolder) view.getTag();
            viewHolder.**getCheckBox**().setChecked(friends.**isChecked**());


            Cursor cursor = null;

               cursor = (Cursor) parent.getItemAtPosition(position);
               Intent intent = new Intent(ContactsList.this, Create_Events.class);
               intent.putExtra("name", cursor.getString(cursor.getColumnIndex(buddyDB.KEY_NAME)));
               startActivity(intent);

        }

    });

    ContactsList[] arrContacts = friendsList.toArray(new ContactsList[0]);


    Uri allContacts = Uri.parse("content://contacts/people");

    Cursor c = managedQuery(allContacts, null, null, null, null);

    String[] columns = new String[] {ContactsContract.Contacts.DISPLAY_NAME};
    int[] views = new int[]  {R.id.contactName};

    startManagingCursor(c);

    SimpleCursorAdapter friendsAdapter = new SimpleCursorAdapter(this, R.layout.contacts_list, c, columns, views);
    this.setListAdapter(friendsAdapter);
}

private static class ContactsName
{
    private String name = "";
    private boolean checked = false;

    public ContactsName(String name)
    {
        this.name = name;
    }

    public String getName()
    {
        return name;
    }

    public boolean isChecked()
    {
        return checked;
    }

    public void setChecked(boolean checked)
    {
        this.checked = checked;
    }

    public String toString()
    {
        return name;
    }

    public void toggleChecked()
    {
        checked = !checked;
    }
}

private static class ContactsListViewHolder
{
    private CheckBox nameCheck;
    private TextView contactName;

    public ContactsListViewHolder(TextView contactName, CheckBox nameCheck)
    {
        this.nameCheck = nameCheck;
        this.contactName = contactName;
    }

    public CheckBox getNameCheck()
    {
        return nameCheck;
    }

    public TextView getContactName()
    {
        return contactName;
    }
}

private static class ContactsCustomAdapter extends ArrayAdapter<ContactsList>
{
    private LayoutInflater inflater;

    public ContactsCustomAdapter(Context context, List<ContactsList> friendsList)
    {
        **super(context, R.layout.contacts_list, R.id.contactName,  R.id.contactCheckbox, friendsList);**
        inflater = LayoutInflater.from(context);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent)
    {
        ContactsList friends = (ContactsList) this.getItem(position);

        CheckBox nameCheck;
        TextView contactName;

        if(convertView == null)
        {
            convertView = inflater.inflate(R.layout.contacts_list, null);

            contactName = (TextView) convertView.findViewById(R.id.contactName);
            nameCheck = (CheckBox) convertView.findViewById(R.id.contactCheckbox);

            convertView.setTag(new ContactsListViewHolder(contactName, nameCheck));

            nameCheck.setOnClickListener(new View.OnClickListener()
                {

                    @Override
                    public void onClick(View v)
                    {
                        CheckBox cb = (CheckBox) v;
                        ContactsList friends = (ContactsList) cb.getTag();
                        friends.**setChecked**(cb.isChecked());

                        if(cb.isChecked())
                        {
                            friendsList.add(friends.**name**);
                        }
                        else
                        {
                            friendsList.remove(friends.**name**);
                        }
                    }   
                });
        }
        else
        {
            ContactsListViewHolder viewHolder = (ContactsListViewHolder) convertView.getTag();
            nameCheck = viewHolder.**getCheckBox**();
            contactName = viewHolder.**getTexView**();
        }
    }
}

@Override
public void onListItemClick(ListView l, View v, int position, long id)
{
    buddyDB.open();
    long name_id;
    super.onListItemClick(l, v, position, id);

    Cursor cursor = null;

       cursor = (Cursor) l.getItemAtPosition(position);
       Intent intent = new Intent(ContactsList.this, Create_Events.class);
       intent.putExtra("name", cursor.getString(cursor.getColumnIndex(buddyDB.KEY_NAME)));
       startActivity(intent);

    ListView list = getListView();
    list.setChoiceMode(2);
    list.setTextFilterEnabled(true);

    l.setItemChecked(position, l.isItemChecked(position));

    Cursor c = ((SimpleCursorAdapter)l.getAdapter()).getCursor();
    c.moveToPosition(position);

    TextView contactName = (TextView) v.findViewById(R.id.contactName);
    String NameValue = contactName.getText().toString();        
    name_id = buddyDB.insertNames(NameValue);

    Toast.makeText(getBaseContext(),
            "Selected: " + buddiesList[position], Toast.LENGTH_SHORT).show();       
    buddyDB.close();



}

}

私
が太字にしたコードは、それらが私が持っているエラーであることを意味します。の create メソッドを要求していますisChecked(), toggleChecked(), setChecked() and getCheckBox()。

のフィールド型または定数型を作成するように求めていますnameが、既に作成しています

private static class ContactsName
    {
        private String name = "";

どこでコーディングを間違えたのかわかりません。名前をデータベーステーブルに挿入できるようにする必要があり、名前を確認するときに他の名前を確認しないようにしたいと考えています。誰でも私を助けることができますか？
ありがとう！=)

Answer 1

これは、例として惑星の名前を使用したものです。文字列を連絡先の名前に変更するだけです。

public class PlanetsActivity extends Activity {
static ArrayList<String> FavList = new ArrayList<String>();

  private ListView mainListView ;
  private Planet[] planets ;
  private ArrayAdapter<Planet> listAdapter ;

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main2);

    // Find the ListView resource. 
    mainListView = (ListView) findViewById( R.id.mainListView );

// When item is tapped, toggle checked properties of CheckBox and Planet.
    mainListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
  @Override
  public void onItemClick( AdapterView<?> parent, View item, 
                           int position, long id) {
    Planet planet = listAdapter.getItem( position );
    planet.toggleChecked();
    PlanetViewHolder viewHolder = (PlanetViewHolder) item.getTag();
    viewHolder.getCheckBox().setChecked( planet.isChecked() );
  }
});


    // Create and populate planets.
planets = (Planet[]) getLastNonConfigurationInstance() ;
if ( planets == null ) {
  planets = new Planet[] { 
      new Planet("Mercury"), new Planet("Venus"), new Planet("Earth"), 
      new Planet("Mars"), new Planet("Jupiter"), new Planet("Saturn"), 
      new Planet("Uranus"), new Planet("Neptune"), new Planet("Ceres"),
      new Planet("Pluto"), new Planet("Haumea"), new Planet("Makemake"),
      new Planet("Eris")
      };  
    }
ArrayList<Planet> planetList = new ArrayList<Planet>();
planetList.addAll( Arrays.asList(planets) );

// Set our custom array adapter as the ListView's adapter.
listAdapter = new PlanetArrayAdapter(this, planetList);
mainListView.setAdapter( listAdapter );      
  }

  /** Holds planet data. */
  private static class Planet {
  private String name = "" ;
  private boolean checked = false ;
  public Planet( String name ) {
  this.name = name ;
}
public String getName() {
  return name;
}
public boolean isChecked() {
  return checked;
}
public void setChecked(boolean checked) {
  this.checked = checked;
}
public String toString() {
  return name ; 
}
public void toggleChecked() {
  checked = !checked ;
    }
  }

  /** Holds child views for one row. */
  private static class PlanetViewHolder {
private CheckBox checkBox ;
private TextView textView ;
public PlanetViewHolder( TextView textView, CheckBox checkBox ) {
  this.checkBox = checkBox ;
  this.textView = textView ;
}
public CheckBox getCheckBox() {
  return checkBox;
}
public TextView getTextView() {
  return textView;
}    
  }

  /** Custom adapter for displaying an array of Planet objects. */
  private static class PlanetArrayAdapter extends ArrayAdapter<Planet> {

    private LayoutInflater inflater;

    public PlanetArrayAdapter( Context context, List<Planet> planetList ) {
      super( context, R.layout.simplerow, R.id.rowTextView, planetList );
      // Cache the LayoutInflate to avoid asking for a new one each time.
      inflater = LayoutInflater.from(context) ;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      // Planet to display
      Planet planet = (Planet) this.getItem( position ); 

      // The child views in each row.
      CheckBox checkBox ; 
      TextView textView ; 

      // Create a new row view
      if ( convertView == null ) {
       convertView = inflater.inflate(R.layout.simplerow, null);

      // Find the child views.
      textView = (TextView) convertView.findViewById( R.id.rowTextView );
      checkBox = (CheckBox) convertView.findViewById( R.id.CheckBox01 );

    // Optimization: Tag the row with it's child views, so we don't have to 
    // call findViewById() later when we reuse the row.
    convertView.setTag( new PlanetViewHolder(textView,checkBox) );

    // If CheckBox is toggled, update the planet it is tagged with.
    checkBox.setOnClickListener( new View.OnClickListener() {
      public void onClick(View v) {
        CheckBox cb = (CheckBox) v ;
        Planet planet = (Planet) cb.getTag();
        planet.setChecked( cb.isChecked() );

        if (cb.isChecked()){
            FavList.add(planet.name);
        }
        else{
            FavList.remove(planet.name);
        }
      }
    });        
  }
  // Reuse existing row view
  else {
    // Because we use a ViewHolder, we avoid having to call findViewById().
    PlanetViewHolder viewHolder = (PlanetViewHolder) convertView.getTag();
    checkBox = viewHolder.getCheckBox() ;
    textView = viewHolder.getTextView() ;
  }

  // Tag the CheckBox with the Planet it is displaying, so that we can
  // access the planet in onClick() when the CheckBox is toggled.
  checkBox.setTag( planet ); 

  // Display planet data
  checkBox.setChecked( planet.isChecked() );
  textView.setText( planet.getName() );      

  return convertView;
}

  }

  public Object onRetainNonConfigurationInstance() {
    return planets ;
  }

  public void comments (View view) {
  Intent myintent = new Intent (getApplicationContext(), DB.class);
  myintent.putExtra("name", FavList);
  startActivity(myintent);
  }
}

DB.class は次のようになります。

public class DB extends ListActivity {

private final String SAMPLE_DB_NAME = "myFriendsDb";
private final String SAMPLE_TABLE_NAME = "friend";

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    ArrayList<String> NumList = getIntent().getStringArrayListExtra("name");
    ArrayList<String> results = new ArrayList<String>();
    SQLiteDatabase sampleDB = null;

    try {
        sampleDB =  this.openOrCreateDatabase(SAMPLE_DB_NAME, MODE_PRIVATE, null);

        sampleDB.execSQL("CREATE TABLE IF NOT EXISTS " +
                SAMPLE_TABLE_NAME +
                " (FirstName VARCHAR);");

        for(String str: NumList){
            sampleDB.execSQL("INSERT INTO " +
                        SAMPLE_TABLE_NAME +
                        " ( FirstName ) Values ('"+str+"');");
            }


        Cursor c = sampleDB.rawQuery("SELECT FirstName FROM " +
                SAMPLE_TABLE_NAME +
                " where FirstName > 10 LIMIT 5", null);

        if (c != null ) {
            if  (c.moveToFirst()) {
                do {
                    String firstName = c.getString(c.getColumnIndex("FirstName"));
                    results.add("" + firstName);
                }while (c.moveToNext());
            } 
        }

        this.setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,results));

    } catch (SQLiteException se ) {
        Log.e(getClass().getSimpleName(), "Could not create or Open the database");
    } finally {
        if (sampleDB != null) 
            sampleDB.execSQL("DELETE FROM " + SAMPLE_TABLE_NAME);
            sampleDB.close();
    }
}
}