的GridView與字母索引和按字母順序的GroupWise在機器人

Question

IndexableGridView.java

public class IndexableGridView extends GridView { 

private boolean mIsFastScrollEnabled = false; 
private IndexGridScroller mScroller = null; 
private GestureDetector mGestureDetector = null; 

public IndexableGridView(Context context) { 
    super(context); 
} 

public IndexableGridView(Context context, AttributeSet attrs) { 
    super(context, attrs); 
} 

public IndexableGridView(Context context, AttributeSet attrs, int defStyle) { 
    super(context, attrs, defStyle); 
} 

@Override 
public boolean isFastScrollEnabled() { 
    return mIsFastScrollEnabled; 
} 

@Override 
public void setFastScrollEnabled(boolean enabled) { 
    mIsFastScrollEnabled = enabled; 
    if (mIsFastScrollEnabled) { 
     if (mScroller == null) 
      mScroller = new IndexGridScroller(getContext(), this); 
    } else { 
     if (mScroller != null) { 
      mScroller.hide(); 
      mScroller = null; 
     } 
    } 
} 

@Override 
public void draw(Canvas canvas) { 
    super.draw(canvas); 

    // Overlay index bar 
    if (mScroller != null) 
     mScroller.draw(canvas); 
} 

@Override 
public boolean onTouchEvent(MotionEvent ev) { 
    // Intercept ListView's touch event 
    if (mScroller != null && mScroller.onTouchEvent(ev)) 
     return true; 

    if (mGestureDetector == null) { 
     mGestureDetector = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() { 

      @Override 
      public boolean onFling(MotionEvent e1, MotionEvent e2, 
        float velocityX, float velocityY) { 
       // If fling happens, index bar shows 
       if (mScroller != null) 
        mScroller.show(); 
       return super.onFling(e1, e2, velocityX, velocityY); 
      } 

     }); 
    } 
    mGestureDetector.onTouchEvent(ev); 

    return super.onTouchEvent(ev); 
} 

@Override 
public void setAdapter(ListAdapter adapter) { 
    super.setAdapter(adapter); 
    if (mScroller != null) 
     mScroller.setAdapter(adapter); 
} 

@Override 
protected void onSizeChanged(int w, int h, int oldw, int oldh) { 
    super.onSizeChanged(w, h, oldw, oldh); 
    if (mScroller != null) 
     mScroller.onSizeChanged(w, h, oldw, oldh); 
} 

} 

ImageAdapter.java

public class ImageAdapter extends BaseAdapter implements SectionIndexer{ 

    private String mSections = "#ABCDEFGHIJKLMNOPQRSTUVWXYZ"; 
     private Context mContext; 
     List<String> mItems; 

     // Constructor 
     public ImageAdapter(Context c, List<String> mItems) { 
      mContext = c; 
      this.mItems = mItems; 
     } 

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

     public Object getItem(int position) { 
      return mItems.get(position); 
     } 

     public long getItemId(int position) { 
      return mItems.indexOf(getItem(position)); 
     } 

     // create a new ImageView for each item referenced by the Adapter 
     public View getView(int position, View convertView, ViewGroup parent) { 
      ImageView imageView; 
      if (convertView == null) { 
      imageView = new ImageView(mContext); 
      imageView.setLayoutParams(new GridView.LayoutParams(85, 85)); 
      imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); 
      imageView.setPadding(8, 8, 8, 8); 
      } else { 
      imageView = (ImageView) convertView; 
      } 

      imageView.setImageBitmap(getBitmapFromAsset("imgs", mItems.get(position))); 
      return imageView; 
     } 

    @Override 
    public Object[] getSections() { 
     // TODO Auto-generated method stub 
     String[] sections = new String[mSections.length()]; 

     for (int i = 0; i < mSections.length(); i++) 

     sections[i] = String.valueOf(mSections.charAt(i)); 

     return sections; 
    } 

    @Override 
    public int getPositionForSection(int sectionIndex) { 
     // TODO Auto-generated method stub 
     return 0; 
    } 

    @Override 
    public int getSectionForPosition(int position) { 
     // TODO Auto-generated method stub 
     for (int i = position; i >= 0; i--) { 
      for (int j = 0; j < getCount(); j++) { 
       if (i == 0) { 
        // For numeric section 
        for (int k = 0; k <= 9; k++) { 
         if (StringMatcher.match(String.valueOf(((String) getItem(j)).charAt(0)), String.valueOf(k))) 
          return j; 
        } 
       } else { 
        if (StringMatcher.match(String.valueOf(((String) getItem(j)).charAt(0)), String.valueOf(mSections.charAt(i)))) 
         return j; 
       } 
      } 
     } 
     return 0; 
    } 
} 
private Bitmap getBitmapFromAsset(String folder, String strName) 
{ 
    AssetManager assetManager = getResources().getAssets(); 
    InputStream istr = null; 
    Bitmap bitmap = null; 
    try { 
     istr = assetManager.open(folder+"/"+strName); 

    bitmap = BitmapFactory.decodeStream(istr); 
    istr.close(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
    return bitmap; 
} 

我上面的代碼用於在gridview的字母索引器。這與this link相同。 我只是改變列表視圖到gridview ..現在我的問題是它不顯示我alphaindexer在右側。

列表視圖索引例如：

我想像下面的圖像顯示數據：

Answer 1

用於排序的網格：

撥打pojo類與名稱字符串。然後將pojo傳遞給Comparator。將名稱1與2進行比較，然後返回前一個。

對於分組：

基本上你想要的分組報頭。爲此，請使用library（Stickygridheaders）。