Question

我有一个Sectioned ListView标题，如＆＃34; A＆＃34; ，＆＃34; B＆＃34; ，...当我第一次加载应用程序并向下滚动列表时，＆＃34; Z＆＃34; 显示在prpoer位置。但每当我向上（向后移动）List时，标题的位置都会发生变化，有时会与其他类别重叠。

我的自定义程序Adapter是：

private class MySimpleCursorAdapter extends SimpleCursorAdapter {

        Holder holder = null;
        public MySimpleCursorAdapter(Context context, int layout, Cursor cur,
                String[] from, int[] to, int flag) {
            super(context, layout, cur, from, to, flag);
        }

        public String getTitle(String contName) {
            return contName.substring(0, 1);
        }

        @Override
        public void bindView(View view, Context context, Cursor mCursor) {

            holder =new Holder();
            final int curPosition  = mCursor.getPosition();
            String cont_Name = mCursor.getString(mCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));

            holder.titleText= (TextView) view.findViewById(R.id.section_title);
            holder.contactTitle= (TextView)view.findViewById(R.id.textView1);
            holder.contactDetail = (TextView)view.findViewById(R.id.textView2);
            holder.myImage = (ImageView) view.findViewById(R.id.imageView1);  

            Log.d("Cursor Postion " , ""+ curPosition);

            if( curPosition == 0 ){
                    holder.titleText.setText(getTitle(cont_Name));
                    holder.titleText.setVisibility(View.VISIBLE);
                    keyWord = getTitle(cont_Name);
                }           
            else if (keyWord.equalsIgnoreCase(getTitle(cont_Name))){
                    holder.titleText.setVisibility(View.GONE);
                    keyWord = getTitle(cont_Name);
                }else if (keyWord != getTitle(cont_Name)){
                    holder.titleText.setVisibility(View.VISIBLE);
                    holder.titleText.setText(getTitle(cont_Name));
                    keyWord = getTitle(cont_Name);
                }else{
                    holder.titleText.setVisibility(View.GONE);
                }

            holder.contactTitle.setText(mCursor.getString(mCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME)));
            holder.contactDetail.setText(mCursor.getString(mCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)));
        }
}

然而，我的layout是：

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >

<TextView
android:id="@+id/section_title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="@android:color/white"
android:textStyle="bold"
android:background="@android:color/holo_blue_bright"
style="?android:attr/listSeparatorTextViewStyle" />

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/section_title"
    android:contentDescription="@string/contact_img" />

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignTop="@+id/imageView1"
    android:layout_marginLeft="17dp"
     android:layout_below="@+id/section_title"
    android:layout_toRightOf="@+id/imageView1"
    android:text="@+id/textView1"
    android:textColor="@color/Black"
    android:textSize="16sp"
    android:textStyle="bold" />

<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/textView1"
    android:layout_marginLeft="17dp"
    android:layout_toRightOf="@+id/imageView1"
    android:paddingBottom="8dp"
    android:text="@+id/textView2" />

</RelativeLayout>

Answer 1

最后两周后得到了我自己的答案......我的if-else条件过于复杂，所以我根据一些不同的标准进行比较。

if (mCursor.getPosition() > 0 && mCursor.moveToPrevious()) 
            {
                preName = mCursor.getString(mCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
                mCursor.moveToNext();
            }
            else if(mCursor.getPosition() == 0)
            {
                preName = null;
            }
            else{
                preName = null;
            }

            if(preName != null){
                preTitle = getTitle(preName);
            }

//===============================================================================
            /*          
             * Setting Header And Contact Details
             */
//===============================================================================

            if(mCursor.isFirst()){
                holder.titleText.setVisibility(View.VISIBLE);
                holder.titleText.setText(itemTitle);
            }

            else if(preName != null){

                if(! itemTitle.equalsIgnoreCase(preTitle))
                {
                    holder.titleText.setVisibility(View.VISIBLE);
                    holder.titleText.setText(itemTitle);
                }else{
                    holder.titleText.setVisibility(View.GONE);
                }
            }

            holder.contactTitle.setText(mCursor.getString(mCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME)));
            holder.contactDetail.setText(mCursor.getString(mCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)));

滚动列表视图会更改标题的位置

1 个答案: