按钮监听器和适配器SimpleCursor

我有一个Fragment类，它可以在ListView显示在我的数据库的一切，我有一个延伸SimpleCursorAdapter我ListView内使用的按键内部类。按钮监听器和适配器SimpleCursor

所以在我的列表视图中的每一个元素，我有几个TextView的和2个按钮。用我的下面的代码，我可以在我的ListView里面使用一个按钮监听器。但在我的听众的内部，我想在与点击按钮相同的元素内获得TextView的内容。但是当我点击一个按钮，以显示我的TextView，它显示我ListView的最后一个元素，我不知道为什么！

例如，如果我有我的ListView 3个元素是这样的：

_id = 1, name = "bob" 
_id = 2, name = "john" 
_id = 3, name = "bobby"

所有这些元素都将显示一个按钮，显示有ID，但如果我点击按钮内，鲍勃，我得到“id = 3”。约翰和鲍比也一样。如果我有一个新的元素，我得到他的ID

我的监听器在我的内部类MySimpleCursorAdapter中的绑定函数。

这里是我的Fragment类：

public class ViewCardEditor extends Fragment implements LoaderManager.LoaderCallbacks<Cursor> { 
public static final String authority = "com.example.jean.cartememoire.CardContentProvider"; 
public String[] from; 
public final int[] to = {R.id.idList, R.id.themeList, R.id.questionList, R.id.reponseList, R.id.difficultList}; 
StockCard stock; 
ViewGroup container; 
ListView listView; 
MySimpleCursorAdapter adapter; 
private ArrayList<String> data = new ArrayList<String>(); 



@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup c, 
         Bundle savedInstanceState) { 
    container = c; 
    View view = inflater.inflate(R.layout.fragment_view_card_editor, container, false); 
    stock = new StockCard(c.getContext()); 
    from = new String[]{stock._ID, 
      stock.THEME, 
      stock.QUESTION, 
      stock.REPONSE, 
      stock.DIFFICULTE}; 

    // Inflate the layout for this fragment 
    if (container != null) { 
     container.removeAllViews(); 
    } 

    //listView.setAdapter(new MyListAdapter(container.getContext(), R.layout.card_stock, data)); 


    //View view_cs = LayoutInflater.from(container.getContext()).inflate(R.layout.card_stock, null); 

    //Supprimer = (Button) view_cs.findViewById(R.id.buttonDelete); 
    //Modifier = (Button) view_cs.findViewById(R.id.buttonModifier); 


    databaseView(view); 

    return view; 
} 

public Loader<Cursor> onCreateLoader(int id, Bundle args) { 
    Uri.Builder builder = new Uri.Builder(); 
    Uri uri = builder.scheme("content").authority(authority) 
      .appendPath(stock.STOCK_TABLE).build(); 
    return new CursorLoader(container.getContext(), uri, from, 
      null, null, null); 
} 
public void onLoadFinished(Loader<Cursor> loader, Cursor data) { 
    adapter.swapCursor(data); 
} 
public void onLoaderReset(Loader<Cursor> loader) { 
    adapter.swapCursor(null); 
} 



public void databaseView(View view) 
{ 
    ArrayList<String> list; 
    Cursor cursor = stock.getData(); 

    listView = (ListView) view.findViewById(R.id.listView); 

    adapter = new MySimpleCursorAdapter(container.getContext(), R.layout.card_stock, null, from, to,0); 
    listView.setAdapter(adapter); 

    LoaderManager manager = getLoaderManager(); 
    manager.initLoader(0, null, this); 

} 


public void deleteOneCard(int id) 
{ 
    Uri.Builder builder = new Uri.Builder(); 
    builder.scheme("content").authority(authority).appendPath(stock.STOCK_TABLE); 

    ContentUris.appendId(builder, id); 
    Uri uri = builder.build(); 
    ContentResolver resolver = container.getContext().getContentResolver(); 
    resolver.delete(uri, null, null); 

} 

private class MySimpleCursorAdapter extends SimpleCursorAdapter 
{ 
    ViewHolder vh; 
    public MySimpleCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to, int flags) { 
     super(context, layout, c, from, to, flags); 

    } 

    public View newView(Context _context, Cursor _cursor, ViewGroup parent) { 
     LayoutInflater inflater = (LayoutInflater) _context.getSystemService(_context.LAYOUT_INFLATER_SERVICE); 
     View view = inflater.inflate(R.layout.card_stock, parent, false); 
     vh = new ViewHolder(); 
     vh.idList = (TextView) view.findViewById(R.id.idList); 
     vh.themeList = (TextView) view.findViewById(R.id.themeList); 
     vh.questionList = (TextView) view.findViewById(R.id.questionList); 
     vh.reponseList = (TextView) view.findViewById(R.id.reponseList); 
     vh.difficulteList = (TextView) view.findViewById(R.id.difficultList); 
     vh.Supprimer = (Button) view.findViewById(R.id.buttonDelete); 
     vh.Modifier = (Button) view.findViewById(R.id.buttonModifier); 


     view.setTag(vh); 
     return view; 
    } 

    public void bindView(View view, Context Context, Cursor cursor) { 
     vh.idList.setText(cursor.getString(cursor.getColumnIndex(stock._ID))); 
     vh.themeList.setText(cursor.getString(cursor.getColumnIndex(stock.THEME))); 
     vh.questionList.setText(cursor.getString(cursor.getColumnIndex(stock.QUESTION))); 
     vh.reponseList.setText(cursor.getString(cursor.getColumnIndex(stock.REPONSE))); 
     vh.difficulteList.setText(cursor.getString(cursor.getColumnIndex(stock.DIFFICULTE))); 

     vh.Supprimer.setOnClickListener(new View.OnClickListener() 
     { 
      public void onClick(View v) { 
       int id = Integer.parseInt(vh.idList.getText().toString()); 
       Toast.makeText(container.getContext(), "bouton delete : "+id, Toast.LENGTH_LONG).show(); 
       //Here everytime I hit the button, the last ID i put on the listView is displayed, no matter what Supprimer button I click 

      } 
     }); 


    } 
} 



public class ViewHolder 
{ 
    Button Supprimer, Modifier; 
    TextView idList, themeList, questionList, reponseList, difficulteList; 

} 
}

这里是我的布局，我TextView：

<?xml version="1.0" encoding="utf-8"?> 
 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 
    xmlns:tools="http://schemas.android.com/tools" 
 
    android:layout_width="match_parent" 
 
    android:layout_height="match_parent" 
 
    android:id="@+id/relativeList" 
 
    android:descendantFocusability="blocksDescendants"> 
 

 
    <TextView 
 
     android:text="@string/difficult" 
 
     android:layout_width="wrap_content" 
 
     android:layout_height="wrap_content" 
 
     android:id="@+id/textView8" 
 
     android:layout_below="@+id/textView7" 
 
     android:layout_alignParentLeft="true" 
 
     android:layout_alignParentStart="true" 
 
     android:layout_marginTop="29dp" /> 
 

 
    <TextView 
 
     android:text="@string/r_ponse" 
 
     android:layout_width="wrap_content" 
 
     android:layout_height="wrap_content" 
 
     android:id="@+id/textView7" 
 
     android:layout_marginTop="20dp" 
 
     android:layout_below="@+id/textView6" 
 
     android:layout_alignParentLeft="true" 
 
     android:layout_alignParentStart="true" /> 
 

 
    <TextView 
 
     android:layout_width="wrap_content" 
 
     android:layout_height="wrap_content" 
 
     android:id="@+id/idList" 
 
     android:layout_alignParentTop="true" 
 
     android:layout_alignLeft="@+id/themeList" 
 
     android:layout_alignStart="@+id/themeList" 
 
     tools:ignore="HardcodedText" /> 
 

 
    <TextView 
 
     android:text="Question :" 
 
     android:layout_width="wrap_content" 
 
     android:layout_height="wrap_content" 
 
     android:id="@+id/textView6" 
 
     android:layout_marginTop="14dp" 
 
     android:layout_below="@+id/textView4" 
 
     android:layout_alignParentLeft="true" 
 
     android:layout_alignParentStart="true" 
 
     tools:ignore="HardcodedText" /> 
 

 
    <TextView 
 
     android:text="@string/id" 
 
     android:layout_width="wrap_content" 
 
     android:layout_height="wrap_content" 
 
     android:id="@+id/textView3" 
 
     android:layout_alignParentTop="true" 
 
     android:layout_alignRight="@+id/textView4" 
 
     android:layout_alignEnd="@+id/textView4" /> 
 

 
    <TextView 
 
     android:text="Thème :" 
 
     android:layout_width="wrap_content" 
 
     android:layout_height="wrap_content" 
 
     android:id="@+id/textView4" 
 
     android:layout_below="@+id/textView3" 
 
     android:layout_alignRight="@+id/textView6" 
 
     android:layout_alignEnd="@+id/textView6" 
 
     tools:ignore="HardcodedText" /> 
 

 
    <TextView 
 
     android:layout_width="wrap_content" 
 
     android:layout_height="wrap_content" 
 
     android:layout_alignBottom="@+id/textView6" 
 
     android:id="@+id/questionList" 
 
     android:layout_toRightOf="@+id/themeList" 
 
     android:layout_toEndOf="@+id/themeList" /> 
 

 
    <TextView 
 
     android:layout_width="wrap_content" 
 
     android:layout_height="wrap_content" 
 
     android:layout_above="@+id/textView8" 
 
     android:layout_alignLeft="@+id/questionList" 
 
     android:layout_alignStart="@+id/questionList" 
 
     android:id="@+id/reponseList" /> 
 

 
    <TextView 
 
     android:layout_width="wrap_content" 
 
     android:layout_height="wrap_content" 
 
     android:layout_alignTop="@+id/textView8" 
 
     android:layout_alignRight="@+id/reponseList" 
 
     android:layout_alignEnd="@+id/reponseList" 
 
     android:id="@+id/difficultList" 
 
     android:layout_toEndOf="@+id/reponseList" 
 
     android:layout_toRightOf="@+id/reponseList" /> 
 

 
    <TextView 
 
     android:layout_width="wrap_content" 
 
     android:layout_height="wrap_content" 
 
     android:id="@+id/themeList" 
 
     android:layout_marginLeft="33dp" 
 
     android:layout_marginStart="33dp" 
 
     tools:ignore="HardcodedText" 
 
     android:layout_below="@+id/idList" 
 
     android:layout_toRightOf="@+id/textView8" 
 
     android:layout_toEndOf="@+id/textView8" /> 
 

 
    <Button 
 
     android:text="@string/supprimerb" 
 
     android:layout_width="wrap_content" 
 
     android:layout_height="wrap_content" 
 
     android:layout_alignParentTop="true" 
 
     android:layout_alignParentRight="true" 
 
     android:layout_alignParentEnd="true" 
 
     android:id="@+id/buttonDelete"/> 
 

 
    <Button 
 
     android:text="@string/modifierB" 
 
     android:layout_width="wrap_content" 
 
     android:layout_height="wrap_content" 
 
     android:id="@+id/buttonModifier" 
 
     android:layout_alignTop="@+id/questionList" 
 
     android:layout_alignParentRight="true" 
 
     android:layout_alignParentEnd="true" 
 
     android:layout_alignLeft="@+id/buttonDelete" 
 
     android:layout_alignStart="@+id/buttonDelete" /> 
 
</RelativeLayout>

感谢您的帮助！

来源

2017-01-02 Zul Huky

大概vh.idList由含有其通过的newView最后呼叫提供最后一个项目视图。

获得点击行项目编号使用findViewById和v参数onClick方法：

public void onClick(View v) { 
    View parentView = (View)v.getParent(); 
    TextView idList = parentView.findViewById(R.id.idList); 
    int id = Integer.parseInt(idList.getText().toString()); 
    ... 
}

来源

2017-01-02 19:27:30

我完全忘了在的onClick参数查看，谢谢它的作品！ –

按钮监听器和适配器SimpleCursor

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