Android CoverFlow在使用相同代码的SONY S平板电脑中无法正常工作

Question

我正在尝试实施CoverFlow。在其他设备中使用相同的代码看起来很完美，但在索尼S平板电脑中看起来并不合适。我附上了SONY S的截图。我在演示中使用了Android 4.0。

我无法理解这个问题。是面向设备还是我的代码中有任何问题？

如果有人能理解，请告诉我。

提前致谢。

我的代码

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

        CoverFlow coverFlow;
        coverFlow = new CoverFlow(this);

        coverFlow.setAdapter(new ImageAdapter(this));

        ImageAdapter coverImageAdapter =  new ImageAdapter(this);

        coverImageAdapter.createReflectedImages();

        coverFlow.setAdapter(coverImageAdapter);

        coverFlow.setSpacing(-50);
        coverFlow.setSelection(8, true);

        setContentView(coverFlow);

        //Use this if you want to use XML layout file
        //setContentView(R.layout.main);
        //coverFlow =  (CoverFlow) findViewById(R.id.coverflow);
    }

    public class ImageAdapter extends BaseAdapter
    {
        int mGalleryItemBackground;
        private Context mContext;

//      private FileInputStream fis;

        private Integer[] mImageIds =
        {
                R.drawable.kasabian_kasabian,
                R.drawable.starssailor_silence_is_easy,
                R.drawable.killers_day_and_age,
                R.drawable.garbage_bleed_like_me,
                R.drawable.death_cub_for_cutie_the_photo_album,
                R.drawable.kasabian_kasabian,
                R.drawable.massive_attack_collected,
                R.drawable.muse_the_resistance,
                R.drawable.starssailor_silence_is_easy
        };

        private ImageView[] mImages;

        public ImageAdapter(Context c) 
        {
            mContext = c;
            mImages = new ImageView[mImageIds.length];
        }
        public boolean createReflectedImages() 
        {
                //The gap we want between the reflection and the original image
                final int reflectionGap = 4;


                int index = 0;
                for (int imageId : mImageIds)
                {
                    Bitmap originalImage = BitmapFactory.decodeResource(getResources(), 
                            imageId);
                    int width = originalImage.getWidth();
                    int height = originalImage.getHeight();


                    //This will not scale but will flip on the Y axis
                    Matrix matrix = new Matrix();
                    matrix.preScale(1, -1);

                    //Create a Bitmap with the flip matrix applied to it.
                    //We only want the bottom half of the image
                    Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0, height/2, width, height/2, matrix, false);


                    //Create a new bitmap with same width but taller to fit reflection
                    Bitmap bitmapWithReflection = Bitmap.createBitmap(width 
                      , (height + height/2), Config.ARGB_8888);

                   //Create a new Canvas with the bitmap that's big enough for
                   //the image plus gap plus reflection
                   Canvas canvas = new Canvas(bitmapWithReflection);
                   //Draw in the original image
                   canvas.drawBitmap(originalImage, 0, 0, null);
                   //Draw in the gap
                   Paint deafaultPaint = new Paint();
                   canvas.drawRect(0, height, width, height + reflectionGap, deafaultPaint);
                   //Draw in the reflection
                   canvas.drawBitmap(reflectionImage,0, height + reflectionGap, null);

                   //Create a shader that is a linear gradient that covers the reflection
                   Paint paint = new Paint(); 
                   LinearGradient shader = new LinearGradient(0, originalImage.getHeight(), 0, 
                     bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff, 0x00ffffff, 
                     TileMode.CLAMP); 
                   //Set the paint to use this shader (linear gradient)
                   paint.setShader(shader); 
                   //Set the Transfer mode to be porter duff and destination in
                   paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN)); 
                   //Draw a rectangle using the paint with our linear gradient
                   canvas.drawRect(0, height, width, 
                     bitmapWithReflection.getHeight() + reflectionGap, paint); 

                   ImageView imageView = new ImageView(mContext);
                   imageView.setImageBitmap(bitmapWithReflection);
                   imageView.setLayoutParams(new CoverFlow.LayoutParams(120, 180));
                   imageView.setScaleType(ScaleType.MATRIX);
                   mImages[index++] = imageView;

                }
                return true;
        }

        public int getCount() {
            return mImageIds.length;
        }

        public Object getItem(int position) {
            return position;
        }

        public long getItemId(int position) {
            return position;
        }

        public View getView(int position, View convertView, ViewGroup parent) {

            //Use this code if you want to load from resources
            //ImageView i = new ImageView(mContext);
            //i.setImageResource(mImageIds[position]);
            //i.setLayoutParams(new CoverFlow.LayoutParams(130, 130));
            //i.setScaleType(ImageView.ScaleType.MATRIX);           
            //return i;

            return mImages[position];
        }
         /** Returns the size (0.0f to 1.0f) of the views 
         * depending on the 'offset' to the center. */ 
         public float getScale(boolean focused, int offset) { 
           /* Formula: 1 / (2 ^ offset) */ 
             return Math.max(0, 1.0f / (float)Math.pow(2, Math.abs(offset))); 
         } 

    }

}

SONY S中的输出

Answer 1

你需要在offsetChildrenLeftAndRight（）方法中调用child.invalidate（）。或者您将imageview设置为居中的地方，请调用此方法。