Android 3D倒影相册开发
http://www.drovik.com/ 2012-11-7 11:26:52 来源：CSDN社区 点击：
先上效果图：
部分代码：
public class MainActivity extends Activity implements OnItemSelectedListener{
private CustomGallery gallery;
private ImageAdapter imageAdapter;
private int[] resIds = new int[] { R.drawable.item1, R.drawable.item2,
R.drawable.item3, R.drawable.item4, R.drawable.item5,
R.drawable.item6, R.drawable.item7, R.drawable.item8,
R.drawable.item9, R.drawable.item10, R.drawable.item11,
R.drawable.item12, R.drawable.item13, R.drawable.item14,
R.drawable.item15 };
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
gallery = (CustomGallery) findViewById(R.id.gallery);
gallery.setSelection(2, true);
gallery.setAnimationDuration(1000);
imageAdapter = new ImageAdapter(this);
gallery.setAdapter(imageAdapter);
gallery.setOnItemSelectedListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position,
long id) {
// 选中Gallery中某个图像时，在ImageSwitcher组件中放大显示该图像
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
public class ImageAdapter extends BaseAdapter {
int mGalleryItemBackground;
private Context mContext;
public ImageAdapter(Context context) {
mContext = context;
TypedArray typedArray = obtainStyledAttributes(R.styleable.Gallery);
mGalleryItemBackground = typedArray.getResourceId(
R.styleable.Gallery_android_galleryItemBackground, 0);
typedArray.recycle();
}
// 第1点改进，返回一个很大的值，例如，Integer.MAX_VALUE
public int getCount() {
return Integer.MAX_VALUE;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView i = createReflectedImages(mContext, resIds[position%resIds.length]);
i.setLayoutParams(new CustomGallery.LayoutParams(120, 100));
i.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
// 设置的抗锯齿,防止图像在旋转的时候出现锯齿
BitmapDrawable drawable = (BitmapDrawable) i.getDrawable();
drawable.setAntiAlias(true);
return i;
}
}
/**
* 为图片添加倒影
* @param mContext
* @param imageId
* @return
*/
public ImageView createReflectedImages(Context mContext, int imageId) {
Bitmap originalImage = BitmapFactory.decodeResource(
mContext.getResources(), imageId);
final int reflectionGap = 4;
int width = originalImage.getWidth();
int height = originalImage.getHeight();
Matrix matrix = new Matrix();
matrix.preScale(1, -1);
Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0,
height / 2, width, height / 2, matrix, false);
Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
(height + height / 2), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmapWithReflection);
canvas.drawBitmap(originalImage, 0, 0, null);
Paint deafaultPaint = new Paint();
canvas.drawRect(0, height, width, height + reflectionGap, deafaultPaint);
canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);
Paint paint = new Paint();
LinearGradient shader = new LinearGradient(0,
originalImage.getHeight(), 0, bitmapWithReflection.getHeight()
+ reflectionGap, 0x70ffffff, 0x00ffffff,
TileMode.MIRROR);
paint.setShader(shader);
paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()
+ reflectionGap, paint);
ImageView imageView = new ImageView(mContext);
imageView.setImageBitmap(bitmapWithReflection);
return imageView;
}
}
工程代码下载地址：
http://www.drovik.com/android/demo/3DGalleryDemo.rar
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